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Introduction: Approximately 234 million surgeries are done annually worldwide. There is a growing concern for the safety of the anesthetic act, and the pre-anesthetic consultation emerges as an important and widely recommended activity, used as a preventive measure for the emergence of a complication. Objectives: To describe the complications related to anesthesia, to identify the factors that contribute to its appearance and to reflect on ways to improve clinical practice. Methods: 700 patients, 175 cases and 525 controls, were evaluated over a period of 21 months. The data obtained through the pre-anesthetic consultation were evaluated descriptively and then tested with conditional univariate and multivariate logistic regression analysis. Results: 175 cases of anesthesia-related complications (2.74%) out of 6365 anesthetic acts were evaluated. Hypotension was the most common complication (40 patients, 22.8%), followed by vomiting (24 patients, 13.7%) and arrhythmia (24 patients, 13.7%). Among the complications, 55% were due to patient conditions, 26% accidental, 10% predictable and 9% iatrogenic. The complications were classified as mild in 106 (61%), moderate in 63 (36%) and severe in six (3%) patients. Conclusion: Patients with more impaired physical status (American Society of Anaesthesiology 3 and 4), with airway disease, tumor or parenchymal disease, diabetes or disorder of lipid metabolism, thyroid disease, former smokers and very prolonged anesthetic acts present a higher risk of anesthesia-related complications. Therefore, they should be actively investigated in the pre-anesthetic evaluation consultation. .

introdução: Cerca de 234 milhões de cirurgias são feitas anualmente no mundo. É cada vez maior o interesse pela segurança do ato anestésico e a consulta pré-anestésica surge como atividade importante e amplamente recomendada, usada como medida preventiva para o surgimento de uma complicação. Objetivos: Descrever as complicações relacionadas à anestesia, identificar os fatores que contribuem para o seu surgimento e refletir sobre formas de melhoria na prática clínica. Métodos: foram avaliados 700 pacientes, 175 casos e 525 controles, em um período de 21 meses. Os dados obtidos por meio da consulta pré-anestésica foram avaliados descritivamente e em seguida testados com regressão logística condicional univariada e multivariada. Resultados: Foram avaliados 175 casos de complicação relacionada à anestesia (2,74%) dentre 6.365 atos anestésicos. A hipotensão foi a complicação mais comum (40 casos, 22,8%), seguida do vômito (24%, 13,7%) e arritmia (24%, 13,7%). Das complicações, 55% foram devidas às condições do paciente, 26% acidentais, 10% previsíveis e 9% iatrogênicas. As complicações foram classificadas como leves em 106 pacientes (61%), moderadas em 63 (36%) e graves em seis (3%). Conclusão: Pacientes com estado físico mais debilitado (ASA 3 e 4), com doença de vias aéreas, tumor ou doença parenquimatosa, com diabetes ou transtorno do metabolismo lipídico, com doença de tireoide, ex-fumantes e as anestesias muito prolongadas apresentam maior risco de complicações relacionadas à anestesia e, por isso, devem ser investigados ativamente na consulta de avaliação pré-anestésica. .

Introducción: Cerca de 234 millones de cirugías se hacen anualmente en todo el mundo. Cada vez crece más el interés por la seguridad de la anestesia, y la consulta preanestésica surge como una actividad importante y ampliamente recomendada, usada como medida preventiva para el surgimiento de una complicación. Objetivos: Describir las complicaciones relacionadas con la anestesia, identificar los factores que contribuyen a su aparición y reflexionar sobre las formas de mejorar la práctica clínica. Métodos: Se evaluaron 700 pacientes, 175 casos y 525 controles, en un período de 21 meses. Los datos que se obtuvieron por medio de la consulta preanestésica se calcularon descriptivamente y enseguida fueron testados con la regresión logística condicional univariada y multivariada. Resultados: Fueron evaluados 175 casos de complicación relacionada con la anestesia (2,74%) entre 6.365 anestesias practicadas. La hipotensión fue la complicación más común (40 casos; 22,8%), seguida del vómito (24%; 13,7%) y de la arritmia (24%; 13,7%). De las complicaciones, un 55% de debieron a las condiciones del paciente, un 26% accidentales, un 10% previsibles y un 9% iatrogénicas. Las complicaciones fueron clasificadas como leves en 106 pacientes (61%), moderadas en 63 (36%) y graves en 6 (3%). Conclusión: Los pacientes con estado físico más debilitado (ASA 3 y 4), con enfermedad de vías aéreas, tumor o enfermedad parenquimatosa, con diabetes o trastorno del metabolismo lipídico, con enfermedad de la tiroides, exfumadores y las anestesias muy prolongadas presentan un mayor riesgo de complicaciones relacionadas con la anestesia y por eso deben ser investigados activamente en la consulta de evaluación preanestésica. .

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INTRODUCTION: Approximately 234 million surgeries are done annually worldwide. There is a growing concern for the safety of the anesthetic act, and the pre-anesthetic consultation emerges as an important and widely recommended activity, used as a preventive measure for the emergence of a complication. OBJECTIVES: To describe the complications related to anesthesia, to identify the factors that contribute to its appearance and to reflect on ways to improve clinical practice. METHODS: 700 patients, 175 cases and 525 controls, were evaluated over a period of 21 months. The data obtained through the pre-anesthetic consultation were evaluated descriptively and then tested with conditional univariate and multivariate logistic regression analysis. RESULTS: 175 cases of anesthesia-related complications (2.74%) out of 6365 anesthetic acts were evaluated. Hypotension was the most common complication (40 patients, 22.8%), followed by vomiting (24 patients, 13.7%) and arrhythmia (24 patients, 13.7%). Among the complications, 55% were due to patient conditions, 26% accidental, 10% predictable and 9% iatrogenic. The complications were classified as mild in 106 (61%), moderate in 63 (36%) and severe in six (3%) patients. CONCLUSION: Patients with more impaired physical status (American Society of Anaesthesiology 3 and 4), with airway disease, tumor or parenchymal disease, diabetes or disorder of lipid metabolism, thyroid disease, former smokers and very prolonged anesthetic acts present a higher risk of anesthesia-related complications. Therefore, they should be actively investigated in the pre-anesthetic evaluation consultation.

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JUSTIFICATIVA E OBJETIVOS: A síndrome dolorosa complexa regional (SDCR), anteriormente conhecida como distrofia simpático-reflexa, descreve um conjunto de sinais e sintomas que incluem dor, sudorese e instabilidade vasomotora. A dor geralmente é desencadeada por estímulo nocivo em um nervo periférico e se mostra desproporcional ao estímulo desencadeante. Seu aparecimento após cirurgia não é incomum, variando com a intervenção. Após descompressão do túnel do carpo (DTC), descreve-se incidência de 2,1 por cento a 5 por cento. O bloqueio simpático pode prevenir o aparecimento de SDCR, mas nenhum estudo validou essa técnica como prevenção da SCR após cirurgia para DTC. O objetivo do estudo foi definir a incidência de SDCR após cirurgia de DTC e sua relação com quatro técnicas de anestesia. MÉTODO: Os pacientes foram distribuídos aleatoriamente e receberam uma das técnicas: anestesia geral, anestesia venosa regional com lidocaína, anestesia venosa regional com lidocaína e clonidina ou bloqueio de plexo axilar. No pós-operatório, foram acompanhados por uma enfermeira que desconhecia a técnica utilizada, fazendo-se o seguimento pelo prontuário eletrônico até 6 meses depois da anestesia. Nesse período, foram pesquisados sinais e sintomas típicos de SDCR e, em caso positivo, instituiu-se o tratamento. Foi realizada avaliação descritiva, empregando-se o Qui-quadrado. RESULTADOS: Foram estudados 301 pacientes. Destes, 25 desenvolveram SDCR configurando uma incidência de 8,3 por cento. Não houve predominância entre as técnicas de anestesia. Foram pesquisados outros fatores como: tabagismo, profissão e outras doenças concomitantes e nenhum mostrou relação com o desenvolvimento de SDCR após DTC. CONCLUSÕES: A incidência de SDCR após cirurgia para DTC é de 8,3 por cento sem relação com as técnicas anestésicas estudadas.

BACKGROUND AND OBJECTIVE: Complex regional pain syndrome (CRPS) previously known as reflex sympathetic dystrophy refers to a set of signs and symptoms that include pain, increased sweating, and vasomotor instability. Pain is usually triggered by a noxious stimulus in a peripheral nerve, which is disproportionate to the triggering stimulus. Its development after surgery is not uncommon varying with the type of intervention. An incidence of 2.1 to 5 percent has been reported after carpal tunnel release (CTR). Sympathetic blockade may prevent the onset of CRPS. However, there is no study validating this technique to prevent CRPS after CTR. The objective of the present study was to define the incidence of CRPS after CTR and its relationship with four anesthetic techniques. METHODS: Patients were randomly distributed to undergo one of the following techniques: general anesthesia, regional intravenous anesthesia with lidocaine, regional intravenous anesthesia with lidocaine and clonidine, or axillary plexus block. Postoperatively, they were followed-up by a nurse who was unaware of the anesthetic technique used, and follow-up was done through electronic patient records for up to 6 months after the anesthesia. During this period signs and symptoms typical of CRPS were investigated and, if positive, treatment was instituted. A descriptive evaluation using the chi-square test was performed. RESULTS: Three-hundred and one patients were investigated. Twenty-five of them developed CRPS, an incidence of 8.3 percent. Predominance was not observed among the anesthetic techniques used. Other factors such as smoking, profession, and other concomitant diseases were also investigated, and none showed a relationship with the development of post-CTR CRPS. CONCLUSIONS: Complex regional pain syndrome has an incidence of 8.3 percent after CTR surgery without association with the anesthetic techniques investigated.

JUSTIFICATIVA Y OBJETIVOS: El síndrome doloroso complejo regional (SDCR), anteriormente conocido como distrofia simpático refleja, es un conjunto de señales y de síntomas que incluyen dolor, sudoresis e inestabilidad vasomotora. El dolor generalmente se desencadena por un estímulo nocivo en un nervio periférico, y no es proporcional al estímulo que lo desencadena. Su aparición después de la cirugía no es algo poco frecuente, variando con la intervención. Posteriormente a la descompresión del túnel del carpo (DTC), vemos una incidencia de 2,1-5 por ciento. El bloqueo simpático puede prevenir la aparición de SDCR. Pero ningún estudio ha refrendado esa técnica como prevención de la SCR después de una cirugía para DTC. El objetivo del estudio fue definir la incidencia de SDCR después de una cirugía de DTC y su relación con cuatro técnicas de anestesia. MÉTODO: Los pacientes se distribuyeron aleatoriamente y recibieron una de las siguientes técnicas: anestesia general, anestesia venosa regional con lidocaína, anestesia venosa regional con lidocaína y clonidina o bloqueo del plexo axilar. En el postoperatorio, estuvieron acompañados por una enfermera que no conocía la técnica utilizada, y se hizo el seguimiento por medio de los datos de la historia clínica electrónica hasta 6 meses después de la anestesia. En ese período, se investigaron las señales y los síntomas típicos de SDCR y en caso positivo, se inició el tratamiento. Fue realizada una evaluación descriptiva, usando el Xi-Cuadrado (Xi²). RESULTADOS: Se estudiaron 301 pacientes. De ellos, 25 desarrollaron SDCR, configurando una incidencia de un 8,3 por ciento. No hubo una predominancia entre las técnicas de anestesia. Se investigaron otros factores, como el tabaquismo, la profesión y otras enfermedades concomitantes, y ningún caso se registró con relación al desarrollo de SDCR posterior a la DTC. CONCLUSIONES: La incidencia de SDCR después de la cirugía para DTC está en el umbral del 8,3 por ciento sin que exista una relación con las técnicas anestésicas estudiadas.

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BACKGROUND AND OBJECTIVES: Complex regional pain syndrome (CRPS) previously known as reflex sympathetic dystrophy refers to a set of signs and symptoms that include pain, increased sweating, and vasomotor instability. Pain is usually triggered by a noxious stimulus in a peripheral nerve, which is disproportionate to the triggering stimulus. Its development after surgery is not uncommon varying with the type of intervention. An incidence of 2.1 to 5% has been reported after carpal tunnel release (CTR). Sympathetic blockade may prevent the onset of CRPS. However, there is no study validating this technique to prevent CRPS after CTR. The objective of the present study was to define the incidence of CRPS after CTR and its relationship with four anesthetic techniques. METHODS: Patients were randomly distributed to undergo one of the following techniques: general anesthesia, regional intravenous anesthesia with lidocaine, regional intravenous anesthesia with lidocaine and clonidine, or axillary plexus block. Postoperatively, they were followed-up by a nurse who was unaware of the anesthetic technique used, and follow-up was done through electronic patient records for up to 6 months after the anesthesia. During this period signs and symptoms typical of CRPS were investigated and, if positive, treatment was instituted. A descriptive evaluation using the chi-square test was performed. RESULTS: Three-hundred and one patients were investigated. Twenty-five of them developed CRPS, an incidence of 8.3%. Predominance was not observed among the anesthetic techniques used. Other factors such as smoking, profession, and other concomitant diseases were also investigated, and none showed a relationship with the development of post-CTR CRPS. CONCLUSIONS: Complex regional pain syndrome has an incidence of 8.3% after CTR surgery without association with the anesthetic techniques investigated.

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A anestesia para procedimentos de Cirurgia Plástica eletivos é geralmente muito segura, todavia o conhecimento das complicações mais frequentes e o controle efetivo são importantes para a segurança do paciente. A consulta pré-anestésica realizada por equipe formada por anestesista e enfermeiros já está estabelecida no contexto da segurança do paciente cirúrgico, pois pode reduzir as intercorrências intra e pós-operatórias e evitar desfechos desfavoráveis. Embora tenha custos efetivos e necessite mudanças de condutas, a consulta pré-anestésica já é uma recomendação do Conselho Federal de Medicina desde 2006. Os autores descrevem as complicações anestésicas em Cirurgia Plástica observadas, ao longo de um ano, no Hospital Sarah Brasília e contextualizam a importância da consulta pré-anestésica. Método: Realizou-se estudo de coorte retrospectiva e analítica de pacientes hospitalares, focado na causalidade abordando as complicações anestésicas dos procedimentos cirúrgicos realizados pela equipe da Cirurgia Plástica e outras especialidades no Hospital Sarah Brasília. Descreveu-se a consulta anestésica realizada rotineiramente no pré-operatório. Resultados: Observaram-se 14 (8%) casos, 11 homens e 3 mulheres, de 477 pacientes operados para procedimentos reconstrutivos pela equipe de Cirurgia Plástica entre 2006 e 2007. Doze dos pacientes apresentavam co-morbidades. As principais complicações foram hipertensão e hipotensão com desfecho favorável. Conclusão: No presente estudo, a incidência de complicações anestésicas foi de 8%, principalmente cardiovasculares e todas apresentaram desfecho favorável.

Anesthesia for elective Plastic Surgery procedures is generally very safe, however the knowledge of the most common and effective control are important for patient safety. The authors consider the importance of pre-anesthetic performed by team of anesthesiologist and nurses in the context of patient safety in plastic surgery because it can reduce intra and postoperative outcomes and reduce complications. The anesthesia is a new trend in improving the quality of surgical patient safety. Although cost effective and require behavioral changes is already a recommendation of the Federal Council of Medicine since 2006. The authors describe the anesthetic complications observed in Plastic Surgery over a year at Sarah Hospital Brasilia and describe the pre-anesthetic evaluation importance of the relationship between pre-anesthetic and anesthetic complications. Methods: This is part of a retrospective cohort study of hospital patients and analytical, focused on causality anesthetic complications of surgical procedures performed in the Sarah Hospital in Brasilia. We describe the anesthetic consultation routinely performed preoperatively. Results: There were 14 (8%) cases, 11 men and 3 women of 477 patients who performed reconstructive procedures between 2006 and 2007. Twelve patients have comorbidities. Major complications were hypotension and hypertension with favorable outcome. Conclusion: This study was low incidence of anesthetic complications and all showed favorable outcome.

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BACKGROUND AND OBJECTIVES: Patients with cerebral palsy (CP) frequently receive drugs for the treatment of concomitant diseases, such as seizures. Midazolam is a benzodiazepine with hypnotic action most often used as pre-anesthetic medication and its drug interactions in patients with CP are unknown. The objective of the present study was to evaluate the effect of midazolam as pre-anesthetic drug on the BIS of patients with CP undergoing chronic treatment with anticonvulsant agents. METHOD: Three groups of patients were assessed: CP without anticonvulsant treatment, CP undergoing treatment with anticonvulsant and a group with no disease and no medication use (control group). On the day before the surgery, with the patients conscious and in dorsal decubitus, the BIS monitor was placed and the basal BIS values were recorded. On the following day, 40 minutes before the surgery, the patients received 0.6 mg*kg(-1) of midazolam orally. Before the start of the anesthetic procedure, the same procedure for BIS recording was carried out after midazolam administration. RESULTS: A total of 107 patients were studied - 39 patients from the Control Group (CG) and 68 with a diagnosis of CP. Among these, 17 used anticonvulsant drugs. Regarding the mean BIS value after the midazolam administration, there was no difference between patients from the CG and those in the CP group that did not take anticonvulsant drugs, whereas the ones who took anticonvulsants exhibited a difference (p = 0.003). The possibility of decrease in the BIS after midazolam use increases according to the number of anticonvulsant drugs used by the patient. CONCLUSIONS: The chronic use of anticonvulsants associated to oral midazolam as pre-anesthetic medication can lead to the decrease in the BIS values, which configures deep level of hypnosis.

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JUSTIFICATIVA E OBJETIVOS: Os pacientes com paralisia cerebral (PC) frequentemente usam fármacos para tratamento de doenças concomitantes, como convulsões. O midazolam é o hipnótico mais utilizado como medicação pré-anestésica e suas interações medicamentosas nos pacientes com PC são desconhecidas. O objetivo deste estudo foi avaliar o midazolam como medicação pré-anestésica no BIS dos pacientes com PC em uso crônico de anticonvulsivantes. MÉTODO: Foram avaliados três grupos de pacientes: PC sem uso de anticonvulsivantes, PC em uso de anticonvulsivante e outro grupo sem doença e sem uso de medicações (Grupo Controle). Na véspera da cirurgia, com os pacientes despertos e em decúbito dorsal, foi colocado o monitor do BIS e foram registrados os valores basais do BIS. No dia seguinte, 40 minutos antes da cirurgia, os pacientes receberam 0,6 mg.kg-1 de midazolam por via oral. Antes do início da anestesia, foi realizado o mesmo procedimento para registro do BIS, após o uso do midazolam. RESULTADOS: Foram estudados 107 pacientes - 39 pacientes do Grupo Controle e 68 com diagnóstico de PC. Desses, 17 faziam uso de anticonvulsivante. Com relação ao valor médio de BIS após o uso do midazolam, não houve diferença entres os pacientes do Grupo Controle e do Grupo PC que não tomavam anticonvulsivante, enquanto entre os pacientes que faziam uso de anticonvulsivantes houve diferença (p = 0,003). A possibilidade de diminuição do BIS após o uso do midazolam aumenta de acordo com o número de anticonvulsivantes usados pelo paciente. CONCLUSÕES: O uso crônico de anticonvulsivante associado ao midazolam via oral como medicação pré-anestésica pode levar à diminuição dos valores de BIS, configurando níveis profundos de hipnose.

BACKGROUND AND OBJECTIVES: Patients with cerebral palsy (CP) frequently receive drugs for the treatment of concomitant diseases, such as seizures. Midazolam is a benzodiazepine with hypnotic action most often used as pre-anesthetic medication and its drug interactions in patients with CP are unknown. The objective of the present study was to evaluate the effect of midazolam as pre-anesthetic drug on the BIS of patients with CP undergoing chronic treatment with anticonvulsant agents. METHOD: Three groups of patients were assessed: CP without anticonvulsant treatment, CP undergoing treatment with anticonvulsant and a group with no disease and no medication use (control group). On the day before the surgery, with the patients conscious and in dorsal decubitus, the BIS monitor was placed and the basal BIS values were recorded. On the following day, 40 minutes before the surgery, the patients received 0.6 mg.kg-1 of midazolam orally. Before the start of the anesthetic procedure, the same procedure for BIS recording was carried out after midazolam administration. RESULTS: A total of 107 patients were studied - 39 patients from the Control Group (CG) and 68 with a diagnosis of CP. Among these, 17 used anticonvulsant drugs. Regarding the mean BIS value after the midazolam administration, there was no difference between patients from the CG and those in the CP group that did not take anticonvulsant drugs, whereas the ones who took anticonvulsants exhibited a difference (p = 0.003). The possibility of decrease in the BIS after midazolam use increases according to the number of anticonvulsant drugs used by the patient. CONCLUSIONS: The chronic use of anticonvulsants associated to oral midazolam as pre-anesthetic medication can lead to the decrease in the BIS values, which configures deep level of hypnosis.

JUSTIFICATIVA Y OBJETIVOS: Los pacientes con parálisis cerebral (PC), a menudo usan fármacos para el tratamiento de enfermedades concomitantes, como las convulsiones. El midazolam es el hipnótico más utilizado como medicación preanestésica y no se conocen sus interacciones medicamentosas en los pacientes con PC. El objetivo de este estudio fue evaluar el midazolam como medicación preanestésica en el BIS de los pacientes con PC en uso crónico de antiepilépticos. MÉTODO: Se evaluaron tres grupos de pacientes: PC sin uso de antiepilépticos, PC en uso de antiepiléptico y otro grupo sin enfermedad y sin uso de medicaciones (grupo control). En la víspera de la cirugía, con los pacientes despiertos y en decúbito dorsal, fue colocado el monitor del BIS y se registraron los valores basales del BIS. Al día siguiente, 40 minutos antes de la cirugía, los pacientes recibieron 0,6 mg.kg-1 de midazolam por vía oral. Antes del inicio de la anestesia fue realizado el mismo procedimiento para registro del BIS, después del uso del midazolam. RESULTADOS: Fueron estudiados 107 pacientes, 39 pacientes del grupo control y 68 con diagnóstico de PC. De ellos, 17 usaban antiepilépticos. Con relación al valor promedio de BIS después del uso del midazolam, no hubo diferencia entres los pacientes del grupo control y del grupo PC que no tomaban antiepiléptico, mientras que los pacientes que usaban antiepilépticos fueron diferentes (p = 0,003). La posibilidad de disminución del BIS después del uso del midazolam, aumenta de acuerdo con el número de antiepiléptico usado por el paciente. CONCLUSIONES: El uso crónico de antiepiléptico asociado al midazolam vía oral como medicación preanestésica, puede conllevar a la disminución de los valores de BIS configurando niveles profundos de hipnosis.

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BACKGROUND AND OBJECTIVES: Correction of congenital clubfoot (CCF) is associated with severe postoperative pain. Caudal epidural block associated with general anesthesia is the anesthetic technique used more often in children, but it is limited by the short duration of the postoperative analgesia. Peripheral nerve blocks are associated with a low incidence of complications and prolonged analgesia. The objective of this study was to compare the duration of analgesia in peripheral nerve blocks and caudal block, as well as morphine consumption in the first 24 hours after correction of CCF in children. METHODS: This is a randomized, double-blind study with children undergoing surgeries for posteromedial release of CCF, who were divided in four groups according to the anesthetic technique: caudal (ACa), sciatic and femoral block (IF), sciatic and saphenous block (IS), and sciatic block and local anesthesia (IL), associated with general anesthesia. In the first 24 hours, patients received oral dypirone and acetaminophen, and they were evaluated by anesthesiologists who were unaware of the technique used. Oral morphine (0.19 mg x kg(1) per day) was administered according to the scores of the CHIPPS (Children's and infants' postoperative pain scale) scale. RESULTS: One hundred and eighteen children separated into four groups: ACa (30), IF (32), IS (28), and IL (28) participated in this study. The mean time between the blockade and the first dose of morphine was 6.16 hours in group ACa, 7.05 hours in group IF, 7.58 in IS, and 8.18 hours in IL. Morphine consumption was 0.3 mg.kg-1 per day in all four groups. Significant differences were not observed among the groups. CONCLUSIONS: peripheral nerve blocks did not promote longer lasting analgesia or a decrease in morphine consumption in the first 24 hours in children undergoing CCF correction when compared to caudal epidural block.

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BACKGROUND AND OBJECTIVES: Anesthesia for total hip arthroplasty (THA) is a challenge due to the advanced age and associated diseases of patients. The objective of this study was to evaluate whether the efficacy of the nociceptive blockade, secondary hemodynamic effects, difficulty to execute the technique, and influence in intraoperative bleeding of lumbar plexus block combined with general anesthesia is equivalent to epidural lumbar block in patients undergoing THA. METHODS: Patients with physical status ASA I to III were randomly separated into two groups, Epidural and Lumbar. In the Epidural group, continuous epidural lumbar block with 10 to 15 mL of 0.5% ropivacaine was performed. Patients in the Lumbar group underwent posterior lumbar plexus block with 0.4 mL.kg(-1) of 0.5% ropivacaine. All patients underwent general anesthesia. The difficulty to perform the technique, its efficacy, and secondary hemodynamic effects were evaluated. RESULTS: Forty-one patients were included in this study. The length of time to execute the epidural block was shorter, but the number of attempts to position the needle was similar in both groups. Epidural block was more effective. In the Lumbar group, an increase in diastolic blood pressure and mean arterial pressure (MAP) and in the double product was observed after the incision, and anesthetic consumption was greater. After the blockade, MAP was lower 50, 60, and 70 minutes after the epidural block. Bleeding was similar in both groups. CONCLUSIONS: Nociceptive blockade, which was not associated with hemodynamic instability when combined with general anesthesia, was more effective in epidural block. Lumbar plexus block proved to be a useful technique when combined with general anesthesia when epidural block is contraindicated.

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BACKGROUND AND OBJECTIVES: The discontinuation of drugs such as angiotensin-converting enzyme inhibitors (ACE inhibitors) has been suggested based on reports of hypotension during anesthesia. This may imply on a higher risk of intraoperative hypertensive peaks with deleterious consequences for the patient. The objective of the present study was to evaluate the influence of the preoperative use of ACE inhibitors on the development of hypotension during anesthesia. METHODS: This is a case-controlled study of patients who developed hypotension after anesthetic induction. The control group was composed of patients of the same age and gender who underwent surgeries during the same period and who did not develop hypotension. Parameters of interest included: age, gender, size of the surgery, prior diagnosis of hypertension, use of ACE inhibitors, physical status (ASA), intraoperative bleeding, anesthetic technique, and duration of the surgery. RESULTS: In 2,179 surgeries, 40 patients developed hypotension. Twenty of those patients used ACEIs on the day of the surgery. The control group was composed by 171 patients, 11 of which used ACE inhibitors. Univariate analysis showed an association between hypertension and advanced age (p < 0.001), prior diagnosis of hypertension (p < 0.001), use of ACEIs (p = 0.006), physical status (ASA) (p = 0.006), and size of the surgery (p = 0.028). Stratified analysis did not show an association between hypotension and use of ACE inhibitors. On logistic regression, the association between the size of the surgery and the age of the patient and the development of hypotension remained. CONCLUSIONS: We did not observe an association between the use of ACE inhibitors and hypotension during anesthesia. The authors considered that the recommendation to discontinue ACE inhibitors on the day before the surgery should be reviewed. Other studies are necessary to confirm those results.

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Justificativa e objetivos: A anestesia para artroplastia total do quadril (ATQ) constitui desafio devido à idade avançada e às doenças associadas dos pacientes. O objetivo do estudo foi avaliar se o bloqueio do plexo lombar combinado à anestesia geral se equivale à anestesia peridural lombar quanto à eficácia do bloqueio nociceptivo, efeitos hemodinâmicos secundários, dificuldade na sua execução e influência no sangramento operatório...

Background and objectives: Anesthesia for total hip arthroplasty (THA) is a challenge due to the advanced age and associated diseases of patients. The objective of this study was to evaluate whether the efficacy of the nociceptive blockade, secondary hemodynamic effects, difficulty to execute the technique, and influence in intraoperative bleeding of lumbar plexus block combined with general anesthesia is equivalent to epidural lumbar...

Justificativa y objetivos: La anestesia para la artroplastia total de la cadera (ATC), constituye un reto a causa de la edad avanzada y de las enfermedades asociadas a los pacientes. El objetivo del estudio, fue evaluar si el bloqueo del plexo lumbar combinado con la anestesia general, equivale a la anestesia epidural lumbar en cuanto a la eficacia del bloqueo nociceptivo, efectos hemodinámicos secundarios, dificultad en su ejecución e influencia en el sangramiento operatorio...

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Justificativa e objetivos: O procedimento de correção de pé torto congênito (PTC) cursa com dor pós-operatória intensa. A técnica mais utilizada em crianças é a peridural caudal associada à anestesia geral. Tem como limitação a curta duração da analgesia pós-operatória. Os bloqueios de nervos periféricos têm sido apontados como procedimentos com baixa incidência de complicações e tempo prolongado de analgesia. O objetivo do estudo foi comparar o tempo de analgesia dos bloqueios nervosos periféricos e bloqueio caudal e o consumo de morfina nas primeiras 24 horas após a correção de PTC em crianças...

Background and objetives: Correction of congenital clubfoot (CCF) is associated with severe postoperative pain. Caudal epidural block associated with general anesthesia is the anesthetic technique used more often in children, but it is limited by the short duration of the postoperative analgesia. Peripheral nerve blocks are associated with a low incidence of complications and prolonged analgesia. The objective of this study was to compare the duration of analgesia in peripheral nerve blocks and caudal block, as well as morphine consumption in the first 24 hours after correction of CCF in children...

Justificativa y objetivos: El procedimiento de corrección depie jorobado congénito (PJC), debuta con dolor postoperatorio intenso. La técnica más utilizada en niños es la epidural caudal asociada a la anestesia general. Posee la limitante de una corta duración de la analgesia postoperatoria. Los bloqueos de nervios periféricos han sido indicados como procedimientos con una baja incidencia de complicaciones y un tiempo prolongado de analgesia. El objetivo del estudio actual, fue comparar el tiempo de analgesia de los bloqueos nerviosos periféricos y del bloqueo caudal y el consumo de morfina, en las primeras 24 horas después de la corrección...

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Justificativa e objetivos: Tem sido sugerida a suspensão de medicamentos como os inibidores da enzima conversora de angiotensina (IECA) com base em relatos de hipotensão arterial durante a anestesia. Isso pode implicar em maior risco de picos hipertensivos no intraoperatório, com efeitos deletérios para o paciente. O objetivo deste estudo foi avaliar a influência dos IECA utilizados no pré-operatório na ocorrência de hipotensão arterial...

Background and objetives: The discontinuation of drugs such as angiotensin-converting enzyme inhibitors (ACE inhibitors) has been suggested based on reports of hypotension during anesthesia. This may imply on a higher risk of intraoperative hypertensive peaks with deleterious consequences for the patient. The objective of the present study was to evaluate the influence of the preoperative use of ACE inhibitors on the development of hypotension...

Justificativa y objetivos: En base a relatos de hipotensión arterial durante la anestesia, se ha sugerido la suspensión de medicamentos como los inhibidores de la enzima conversora de angiotensina (IECA). Eso puede redundar en un riesgo más elevado de picos hipertensivos en el intraoperatorio y con efectos perjudiciales para el paciente. El objetivo de este estudio, fue evaluar la influencia de los IECA utilizados en el preoperatorio si surge la hipotensión arterial...

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JUSTIFICATIVA E OBJETIVOS: A dor após artroplastia total do quadril (ATQ) é intensa e agravada pelas mobilizações, o que demanda técnica analgésica eficaz e que permita mobilidade precoce, participação nas atividades de reabilitação e rápida recuperação funcional. O objetivo do estudo foi comparar os efeitos das técnicas de analgesia controlada pelo paciente (ACP) pelas vias peridural e perineural do plexo lombar sobre a reabilitação funcional em pacientes submetidos à ATQ. MÉTODO: Pacientes estado físico ASA I a III foram alocados aleatoriamente nos grupos Peridural e Lombar. Para a ATQ, foi realizada anestesia peridural lombar contínua com ropivacaína a 0,5 por cento (Peridural) ou bloqueio contínuo do plexo lombar com ropivacaína a 0,5 por cento (Lombar). Na sala de recuperação, iniciou-se ACP com infusão de ropivacaína a 0,2 por cento (Lombar) ou ropivacaína a 0,2 por cento + fentanil 3 µg.mL-1 (Peridural). A eficácia da analgesia nas primeiras 48 horas após a ATQ (escores de dor, consumo de morfina de resgate e de bolos da bomba de ACP) foi comparada entre os grupos. Diferentes parâmetros da reabilitação pós-operatória foram estudados. RESULTADOS: Quarenta e um pacientes foram submetidos à análise estatística. Os escores de dor em repouso foram semelhantes nos dois grupos. Apesar do controle mais efetivo da dor dinâmica no grupo Peridural e o uso de morfina ter sido maior, mais frequente e mais precoce no grupo Lombar, não houve diferença entre os grupos em nenhum dos parâmetros estudados de reabilitação. As técnicas de analgesia não influenciaram as falhas no processo de reabilitação. CONCLUSÕES: A maior efetividade da analgesia peridural não se traduziu em melhora no processo de reabilitação, nem reduziu o tempo necessário para alcançar os desfechos estudados.

BAKGROUND AND OBJECTIVES: Pain after total hip arthroplasty (THA) is severe and it is aggravated by movements, which requires an effective analgesic technique that allows early mobilization, participation in rehabilitation activities, and fast functional recovery. The objective of this study was to compare the effects of epidural and perineural patient-controlled analgesia (PCA) of the lumbar plexus on functional rehabilitation of patients undergoing THA. METHODS: Patients classified as physical status ASA I to III were randomly divided into two groups: Epidural and Lumbar. For THA, patients underwent continuous epidural lumbar block with 0.5 percent ropivacaine (Epidural) or continuous lumbar plexus block with 0.5 percent ropivacaine (Lumbar). In the recovery room, PCA with infusion of 0.2 percent ropivacaine (Lumbar) or 0.2 percent ropivacaine + fentanyl 3 µg.mL-1 (Epidural) was instituted. Analgesic efficacy in the first 48 hours after THA (pain scores, rescue morphine consumption, and bolus of the PCA pump) was compared between both groups. Different postoperative rehabilitation parameters were analyzed. RESULTS: Forty-one patients underwent statistical analysis. Resting pain scores were similar in both groups. Despite more effective control of dynamic pain in the Epidural group and the greater, more frequent, and earlier morphine consumption in the Lumbar group, rehabilitation parameters evaluated did not differ in both groups. Analgesia techniques did not affect rehabilitation failures. CONCLUSIONS: The greater effectivity of epidural analgesia did not translate in improvement of the rehabilitation process nor did it decrease the time necessary to achieve end goals.

JUSTIFICATIVA Y OBJETIVOS: El dolor después de la artroplastia total de la cadera (ATC) es intenso y se agrava por los movimientos, lo que demanda una técnica analgésica eficaz y que permita la movilidad precoz, la participación en las actividades de rehabilitación, y una rápida recuperación funcional. El objetivo de este estudio, fue comparar los efectos de las técnicas de analgesia controlada por el paciente (ACP), por las vías epidural y perineural del plexo lumbar sobre la rehabilitación funcional en pacientes sometidos a la ATC. MÉTODO: Pacientes en estado físico ASA I a III, que fueron ubicados aleatoriamente en los grupos Epidural y Lumbar. Para la ATC, se realizó la anestesia epidural lumbar continua con ropivacaína a 0,5 por ciento (Epidural) o bloqueo continuo del plexo lumbar con ropivacaína a 0,5 por ciento (Lumbar). En la sala de recuperación, se inició ACP con infusión de ropivacaína a 0,2 por ciento (Lumbar) o ropivacaína a 0,2 por ciento + fentanil 3 µg.mL-1 (Epidural). La eficacia de la analgesia en las primeras 48 horas después de la ATC (niveles de dolor, consumo de morfina de rescate y de bolos de la bomba de ACP), se comparó entre los grupos. Los diferentes parámetros de la rehabilitación postoperatoria también se estudiaron. RESULTADOS: Cuarenta y un pacientes se sometieron al análisis estadístico. Los niveles de dolor en reposo fueron similares en los dos grupos. A pesar de un control más efectivo del dolor dinámico en el grupo Epidural y de un uso más potente de la morfina, que se aplicó más a menudo y precozmente en el grupo Lumbar, no hubo diferencia entre los grupos en ninguno de los parámetros estudiados de rehabilitación. Las técnicas de analgesia no influyeron en las fallas en el proceso de rehabilitación. CONCLUSIONES: El más alto nivel de efectividad de la analgesia epidural, no se tradujo en una mejoría en el proceso de rehabilitación, ni tampoco redujo el tiempo necesario para alcanzar los resultados estudiados.

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UNLABELLED: BAKGROUND AND OBJECTIVES: Pain after total hip arthroplasty (THA) is severe and it is aggravated by movements, which requires an effective analgesic technique that allows early mobilization, participation in rehabilitation activities, and fast functional recovery. The objective of this study was to compare the effects of epidural and perineural patient-controlled analgesia (PCA) of the lumbar plexus on functional rehabilitation of patients undergoing THA. METHODS: Patients classified as physical status ASA I to III were randomly divided into two groups: Epidural and Lumbar. For THA, patients underwent continuous epidural lumbar block with 0.5% ropivacaine (Epidural) or continuous lumbar plexus block with 0.5% ropivacaine (Lumbar). In the recovery room, PCA with infusion of 0.2% ropivacaine (Lumbar) or 0.2% ropivacaine + fentanyl 3 microg.mL-1 (Epidural) was instituted. Analgesic efficacy in the first 48 hours after THA (pain scores, rescue morphine consumption, and bolus of the PCA pump) was compared between both groups. Different postoperative rehabilitation parameters were analyzed. RESULTS: Forty-one patients underwent statistical analysis. Resting pain scores were similar in both groups. Despite more effective control of dynamic pain in the Epidural group and the greater, more frequent, and earlier morphine consumption in the Lumbar group, rehabilitation parameters evaluated did not differ in both groups. Analgesia techniques did not affect rehabilitation failures. CONCLUSIONS: The greater effectivity of epidural analgesia did not translate in improvement of the rehabilitation process nor did it decrease the time necessary to achieve end goals.

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BACKGROUND AND OBJECTIVES: Intravenous or epidural patient-controlled analgesia (PCA) is a safe and effective technique in the treatment of postoperative pain. However, the use of opioids is not devoid of risks,and respiratory depression represents the most feared complication. The objective of the present study was to describe the incidence of respiratory depression associated with postoperative analgesia with the intravenous or epidural administration of opioids and the characteristics of the patients who developed this complication. METHODS: This is a retrospective, incidence study in patients who underwent surgeries at the Hospital SARAH Brasília from December 1999 to December 2007 and treated with intravenous or epidural PCA with opioids. Respiratory depression was defined as: respiratory rate < 8 bpm, need to use naloxone, or peripheral oxygen saturation below 90%. RESULTS: Two thousand seven hundred and ninety patients were evaluated; 635 of those patients received intravenous PCA and 2155 epidural analgesia. Seven patients developed postoperative respiratory depression (0.25%). Six of those patients were treated with intravenous PCA with morphine, while the last one received epidural analgesia with fentanyl. Patients had a mean age of 30.5 +/- 24.7 years; the mean time between the end of anesthesia and the development of respiratory depression was 18.1 +/- 26.3 hours. The incidence of respiratory depression was significantly higher in PCA with intravenous morphine (p = 0.001) and age below 16 years (p < 0.05). CONCLUSIONS: The incidence of respiratory depression was similar to that described in the literature; it is more frequent in children and adolescents, and with intravenous PCA.

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JUSTIFICATIVA E OBJETIVOS: A analgesia controlada pelo paciente (PCA), por via venosa ou peridural, é técnica segura e eficaz no tratamento da dor pós-operatória. Todavia, o uso de opioides não é isento de risco, e a depressão respiratória é a complicação mais temida. Os objetivos deste estudo foram descrever a incidência de depressão respiratória associada à analgesia pós-operatória com opioides administrados por via peridural ou venosa e as características dos pacientes que apresentaram a complicação. MÉTODO: Estudo de incidência, retrospectivo, em pacientes operados no Hospital SARAH Brasília entre dezembro de 1999 e dezembro de 2007 e tratados com PCA com opioides por via venosa ou peridural. Foram definidos como casos de depressão respiratória: frequência respiratória < 8 irpm, necessidade do uso de naloxona ou saturação periférica de oxigênio abaixo de 90 por cento. RESULTADOS: Foram avaliados 2790 pacientes, dos quais 635 pacientes receberam PCA venosa e 2155, analgesia peridural. Ocorreram sete casos de depressão respiratória pós-operatória (incidência de 0,25 por cento). Destes, seis pacientes foram tratados com PCA venosa com morfina, enquanto o último recebeu analgesia peridural com fentanil. A média de idade foi de 30,5 ± 24,7 anos; o tempo médio entre o término da anestesia até a ocorrência da depressão respiratória foi de 18,1 ± 26,3 horas. A ocorrência de depressão respiratória foi significativamente mais frequente na PCA venosa com morfina (p = 0,001) e idade menor que 16 anos (p < 0,05). CONCLUSÕES: A incidência de depressão respiratória encontrada foi semelhante à descrita na literatura, sendo mais frequente em crianças e adolescentes, e com PCA venosa.

BACKGROUND AND OBJECTIVES: Intravenous or epidural patient-controlled analgesia (PCA) is a safe and effective technique in the treatment of postoperative pain. However, the use of opioids is not devoid of risks,and respiratory depression represents the most feared complication. The objective of the present study was to describe the incidence of respiratory depression associated with postoperative analgesia with the intravenous or epidural administration of opioids and the characteristics of the patients who developed this complication. METHODS: This is a retrospective, incidence study in patients who underwent surgeries at the Hospital SARAH Brasília from December 1999 to December 2007 and treated with intravenous or epidural PCA with opioids. Respiratory depression was defined as: respiratory rate < 8 bpm, need to use naloxone, or peripheral oxygen saturation below 90 percent. RESULTS: Two thousand seven hundred and ninety patients were evaluated; 635 of those patients received intravenous PCA and 2155 epidural analgesia. Seven patients developed postoperative respiratory depression (0.25 percent). Six of those patients were treated with intravenous PCA with morphine, while the last one received epidural analgesia with fentanyl. Patients had a mean age of 30.5 ± 24.7 years; the mean time between the end of anesthesia and the development of respiratory depression was 18.1 ± 26.3 hours. The incidence of respiratory depression was significantly higher in PCA with intravenous morphine (p = 0.001) and age below 16 years (p < 0.05). CONCLUSIONS: The incidence of respiratory depression was similar to that described in the literature; it is more frequent in children and adolescents, and with intravenous PCA.

JUSTIFICATIVA Y OBJETIVOS: La analgesia controlada por el paciente (PCA), por vía venosa o epidural, es una técnica segura y eficaz en el tratamiento del dolor postoperatorio. Sin embargo, el uso de opioides no está exento de riesgos y la depresión respiratoria es la complicación más temida. Los objetivos de este estudio fueron describir la incidencia de depresión respiratoria asociada a la analgesia postoperatoria con opioides administrados por vía epidural o venosa, y las características de los pacientes que presentaron la complicación. MÉTODO: Estudio de incidencia retrospectiva en pacientes operados en el Hospital SARAH Brasília entre diciembre de 1999 y diciembre de 2007 y tratados con PCA con opioides por vía venosa o epidural. Se definieron como casos de depresión respiratoria, frecuencia respiratoria d" 8 irpm, necesidad del uso de naloxona, o saturación periférica de oxígeno por debajo de un 90 por ciento. RESULTADOS: Fueron evaluados 2790 pacientes, de los cuales 635 pacientes recibieron PCA venosa y 2155, analgesia epidural. Se dieron siete casos de depresión respiratoria postoperatoria (incidencia de 0,25 por ciento). De ellos, seis pacientes fueron tratados con PCA venosa con morfina, mientras que el último recibió analgesia epidural con fentanil. El promedio de edad fue de 30,5 ± 24,7 años; el tiempo medio entre el término de la anestesia hasta el aparecimiento de la depresión respiratoria fue de 18,1 ± 26,3 horas. El aparecimiento de depresión respiratoria fue significativamente más frecuente en la PCA venosa con morfina (p = 0,001) y en una edad menor que 16 años (p < 0,05). CONCLUSIONES: La incidencia de depresión respiratoria encontrada fue similar a la descrita en la literatura, siendo más frecuente en niños y adolescentes con PCA venosa.

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BACKGROUND AND OBJECTIVES: Posterior lumbar plexus block promotes effective postoperative analgesia in total knee arthroplasty. Ropivacaine and bupivacaine do not show differences in analgesic efficacy when used in different peripheral nerve blocks. The objective of this study was to compare the efficacy of postoperative analgesia resulting from the administration of a single dose of 0.5% bupivacaine or 0.5% ropivacaine in posterior lumbar plexus block for total hip arthroplasty. METHODS: Thirty-seven patients were randomly divided in two groups according to the local anesthetic used: Group B - 0.5% bupivacaine with 1:200,000 epinephrine; or group R - 0.5% ropivacaine. During the postoperative period, pain scores and morphine consumption in patient controlled analgesia were compared between groups. Bleeding during surgery and the incidence of side effects and complications were also compared. RESULTS: Although pain scores were lower in Group R 8 hours, 12 hours, and 24 hours after the blockade, these differences were not clinically significant. Multiple linear regression identified the local anesthetic as an independent variable. Differences in morphine consumption, intraoperative bleeding, and the incidence of complications and side effects were not observed between both groups. CONCLUSIONS: 0.5% Bupivacaine and 0.5% ropivacaine produced effective and prolonged postoperative pain relief after total hip arthroplasty, without clinical differences, when equivalent doses were administered for posterior lumbar plexus block.

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JUSTIFICATIVA E OBJETIVOS: O bloqueio do plexo lombar pela via posterior promove analgesia pós- operatória efetiva na artroplastia totaldo quadril. Ropivacaína e bupivacaína não apresentaram qualquer diferença na eficácia analgésica em diferentes bloqueios de nervos periféricos. O objetivo deste estudo foi comparar a eficácia da analgesia pós-operatória resultante da administração em dose única da bupivacaína a 0,5% ou da ropivacaína a 0,5% no bloqueio doplexo lombar pela via posterior na artroplastia total do quadril. MÉTODO: Trinta e sete pacientes foram alocados aleatoriamente em dois grupos, segundo o anestésico local utilizado no bloqueio: Grupo B û bupivacaína a 0,5% com epinefrina 1:200.000 ou Grupo R -ropivacaína a 0,5%. Durante o período pós-operatório, os escores de dor e o consumo de morfina na analgesia controlada pelo paciente foram comparados entre os grupos. O sangramento durante a operação e a incidência de efeitos adversos e de complicações também foram comparados. RESULTADOS: Apesar dos escores de dor terem sido menores no Grupo R 8, 12 e 24 horas após o bloqueio, essas diferenças não foram clinicamente significativas. Regressão linear múltipla não identificou o anestésico local como variável independente. Não houve diferença noconsumo de morfina, no sangramento intraoperatório e na incidência decomplicações e efeitos adversos entre os dois grupos.

BACKGROUND AND OBJECTIVES: Posterior lumbar plexus block promotes effective postoperative analgesia in total knee arthroplasty. Ropivacaine and bupivacaine do not show differences in analgesic efficacy when used in different peripheral nerve blocks. The objective of this study was to compare the efficacy of postoperative analgesiaresulting from the administration of a single dose of 0.5% bupivacaine or 0.5% ropivacaine in posterior lumbar plexus block for total hip arthroplasty.METHODS: Thirty-seven patients were randomly divided in two groups according to the local anesthetic used: Group B û 0.5% bupivacaine with 1:200,000 epinephrine; or group R û 0.5% ropivacaine. During the postoperative period, pain scores and morphine consumption in patient controlled analgesia were compared between groups. Bleeding during surgery and the incidence of side effects and complications were also compared.RESULTS: Although pain scores were lower in Group R 8 hours, 12 hours, and 24 hours after the blockade, these differences were not clinically significant. Multiple linear regression identified the local anesthetic as an independent variable. Differences in morphine consumption, intraoperative bleeding, and the incidence of complications and side effects were not observed between both groups. CONCLUSIONS: 0.5% Bupivacaine and 0.5% ropivacaine produced effective and prolonged postoperative pain relief after total hip arthroplasty, without clinical differences, when equivalent doses were administered for posterior lumbar plexus block.

JUSTIFICATIVA Y OBJETIVOS: El bloqueo del plexo lumbar por la vía posterior, genera una analgesia postoperatoria efectiva en la artroplastia total de la cadera. La ropivacaína y la bupivacaína no arrojaron ninguna diferencia en la eficacia analgésica en diferentes bloqueos de nervios periféricos. El objetivo de este estudio, fue comparar la eficacia de la analgesia postoperatoria, resultante de la administración en dosis única de la bupivacaína a 0,5% o de la ropivacaína a 0,5% en el bloqueo del plexo lumbar por la vía posterior en la artroplastia total de la cadera. MÉTODO: Treinta y siete pacientes fueron ubicados aleatoriamente en dos grupos según el anestésico local utilizado en el bloqueo:Grupo B û bupivacaína a 0,5% con epinefrina 1:200.000 o Grupo R - ropivacaína a 0,5%. Durante el período postoperatorio, los puntajes de dolor y el consumo de morfina en la analgesia controlada por el paciente, fueron comparados entre los grupos. El sangramiento durante la operación y la incidencia de efectos adversos y de complicaciones también fueron comparados. RESULTADOS: Pese a que los puntajes de dolor hayan sido menores en el Grupo R 8 horas, 12 horas y 24 horas después del bloqueo,esas diferencias no fueron clínicamente significativas. La regresión lineal múltiple no identificó el anestésico local como una variable independiente. No hubo diferencia en el consumo de morfina, en el sangramiento intraoperatorio y en la incidencia decomplicaciones y efectos adversos entre los dos grupos. CONCLUSIONES: La bupivacaína a 0,5% y la ropivacaína a 0,5%, ofrecieron un alivio eficaz y prolongado del dolor postoperatoriodespués de la artroplastia total de la cadera, sin diferencia clínica, cuando dosis equivalentes fueron administradas en el bloqueo del plexo lumbar por la vía posterior.

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BACKGROUND AND OBJECTIVES: Midazolam is a benzodiazepine with hypnotic action widely used as pre-anesthetic medication in pediatric anesthesia. Children with cerebral palsy (CP) also benefit from the use of midazolam, but its effects on this group of patients, who present several particularities, including changes at the site of action of midazolam, are still unknown. The objective of this study was to evaluate the effects of midazolam, when used as pre-anesthetic medication, on the bispectral index (EEG-BIS) of patients with cerebral palsy. METHODS: Two groups of patients were evaluated: one group with the diagnosis of CP and the other without central and peripheral nervous system disorders. The EEG-BIS was recorded in the room, the day before the surgery and at the day of the surgery, 40 minutes after the administration of 0.6 mg.kg(-1) of oral midazolam. Patients with a history of paradoxal reaction to midazolam as well as patients in the control group who were using other medications were excluded. RESULTS: Seventy-seven patients of both genders, 4 to 18 years old, participated in this study. Differences in EEG-BIS between both groups were not detected. After the use of midazolam EEG-BIS decreased in both groups with a statistically significant difference in each group. Statistically significant intergroup differences were not observed. CONCLUSIONS: Midazolam, used as pre-anesthetic medication, at a dose of 0.6 mg.kg(-1), reduced basal EEG-BIS without characterizing hypnosis and without statistically significant differences between the study groups.

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