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OBJECTIVE: To identify and categorize system factors in complex laparoscopic surgery that have the potential to either threaten patient safety or support system resilience. BACKGROUND: The operating room is a uniquely complex sociotechnical work system wherein surgical successes prevail despite pervasive safety threats. Holistically characterizing intraoperative factors that thus support system resilience in addition to those that threaten patient safety using contextual methodologies is critical for optimizing surgical safety overall. METHOD: In this prospective descriptive interdisciplinary study, 19 audio/video recordings of complex laparoscopic general surgical procedures were directly observed and transcribed. Using a qualitative systems-based approach, intraoperative human factors with the potential to impact patient safety, either as a safety threat or as a support for resilience, were identified. Adverse events were further assessed for shared threats and supports. Data collection was guided by the Systems Engineering Initiative for Patient Safety 2.0 work system model. RESULTS: A total of 1083 relevant observations were made over 39.8 hours of operative time, enabling the identification of 79 distinct safety threats and 67 resilience supports within the surgical system. Safety threats associated with the physical environment, tasks, organization, and equipment were prevalent and observed in equal measure, whereas supports for resilience were predominantly attributed to clinician behaviors, including proactive team management and skills coaching. Two subclinical adverse events were identified; shared safety threats included suboptimal technology design, whereas shared resilience supports included calm clinician behavior and redundant intraoperative resourcing. CONCLUSIONS: Safety threats and resilience supports were found to be systematic in the surgical setting. Identified safety threats should be prioritized for remediation, and clinician behaviors that contribute to fostering resilience should be valued and protected.
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Laparoscopía/normas , Seguridad del Paciente , Humanos , Complicaciones Intraoperatorias/prevención & control , Estudios Prospectivos , Medición de Riesgo , Grabación en VideoRESUMEN
The present study aimed to determine the impact of different sealant materials on histopathological changes to the liver surface after liver resection. Thirty-six landrace pigs underwent left anatomical hemihepatectomy and were assigned to a histopathological control group (HPC, n = 9) with no bleeding control, a clinically simulated control group (CSC, n = 9) with no sealant but bipolar cauterization and oversewing of the liver surface, and two treatment groups (n = 9 each) with a collagen-based sealant (CBS) or a fibrinogen-based sealant (FBS) on resection surface. After postoperative day 6, tissue samples were histologically examined. There were no significant differences in preoperative parameters between the groups. Fibrin production was higher in sealant groups compared with the HPC and CSC groups (both p < 0.001). Hepatocellular regeneration in sealant groups was higher than in both control groups. A significantly higher regeneration was seen in the FBS group. Use of sealants increased the degree of fibrin exudation at the resection plane. Increased hepatocellular necrosis was seen in the CBS group compared with the FBS group. The posthepatectomy hepatocellular regeneration rate was higher in the FBS group compared with the CBS group. Randomized studies are needed to assess the impact of sealants on posthepatectomy liver regeneration in the clinical setting.
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Colágeno/uso terapéutico , Adhesivo de Tejido de Fibrina/uso terapéutico , Fibrinógeno/uso terapéutico , Hemostáticos/uso terapéutico , Hepatectomía/efectos adversos , Regeneración Hepática/efectos de los fármacos , Hemorragia Posoperatoria/tratamiento farmacológico , Trombina/uso terapéutico , Administración Tópica , Animales , Colágeno/administración & dosificación , Combinación de Medicamentos , Fibrina/biosíntesis , Adhesivo de Tejido de Fibrina/administración & dosificación , Fibrinógeno/administración & dosificación , Hemostáticos/administración & dosificación , Hígado/patología , Necrosis/tratamiento farmacológico , Periodo Perioperatorio , Porcinos , Trombina/administración & dosificación , Resultado del TratamientoRESUMEN
BACKGROUND: The burden of device-related interruptions is expected to increase as modern surgical practices adopt complex minimally invasive surgery devices. Currently, there is a paucity of empiric data that examined the nature of device-related interruptions using comprehensive intraoperative data. METHODS: We performed a cross-sectional study of consecutive elective laparoscopic general surgery cases performed in one operating room (OR) at a referral center between April 2014 and April 2016. The included cases were directly observed using a comprehensive multiport data recorder called the OR Black Box. The data were synchronized, encrypted, and reviewed by expert surgeon assessors. The assessors characterized device-related interruptions that occurred during operations. The prevalence of the cases with device-related interruptions was calculated. Device-related interruptions were classified into a priori categories of (1) absent/wrong device; (2) improper assembly; (3) loss of sterility; (4) disconnection; and (5) device failure. RESULTS: In a cohort of 210 cases, 64 (30%) had at least one device-related interruption. Sleeve gastrectomy (52%) and oncologic gastrectomy (43%) procedures experienced the highest prevalence of device-related interruptions. Device failure was the most frequently chosen category with laparoscopic staplers implicated in more than half of these failures. Three failure modes were described for laparoscopic stapler, of which stapler malfunction (46%) was the most common. CONCLUSIONS: Device-related interruptions occurred frequently in the OR and could be characterized into one of the five categories. Understanding the nature of the device-related interruptions can help guide implementation of safety interventions and user training in the future.
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Falla de Equipo/estadística & datos numéricos , Gastrectomía/instrumentación , Laparoscopía/instrumentación , Adulto , Estudios Transversales , Procedimientos Quirúrgicos Electivos/instrumentación , Femenino , Gastrectomía/métodos , Humanos , Masculino , Persona de Mediana Edad , Quirófanos , Engrapadoras QuirúrgicasRESUMEN
BACKGROUND/OBJECTIVE: Biliary leakage is a potential complication of liver resection and is still a concern. The aim of the present study was to evaluate the effectiveness of four routinely used sealants in preventing bile leakage under pressure from an induced perforation of the gallbladder in a porcine model. METHODS: Forty Landrace pigs were randomly assigned to one of five groups. These included a control group (n = 8) and one group each for the sealants TachoSil®, TissuCol Duo®, Coseal®, and FloSeal® (n = 8 per group). In the control group, the perforation was left unsealed. To evaluate the biliostatic potential of the sealants, we measured the pressure that was needed to induce leakage (mmHg) and the gallbladder volume (cc) at the time of leakage in each group. RESULTS: A significantly higher mean pressure was required to induce leakage in the sealant groups compared with the control group. However, the biliostatic effects were heterogeneous among the sealant groups. Sealants with the highest to lowest effectiveness were TachoSil, Coseal, TissuCol, and FloSeal. The mean gallbladder volume at the time of leakage also varied between sealant groups. CONCLUSION: Biliostatic properties are markedly improved by the use of modern sealants compared with using no sealant. However, the advantages and disadvantages of using sealants should be carefully considered in each clinical situation. The effectiveness of the sealants should be evaluated in chronic and clinical studies.
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Fuga Anastomótica/etiología , Fuga Anastomótica/prevención & control , Conductos Biliares Intrahepáticos/lesiones , Bilis , Adhesivo de Tejido de Fibrina , Fibrinógeno , Vesícula Biliar/lesiones , Hepatectomía/efectos adversos , Polietilenglicoles , Trombina , Técnicas de Cierre de Heridas , Animales , Fenómenos Biomecánicos , Combinación de Medicamentos , Modelos Animales , Presión , PorcinosRESUMEN
Parenchymal transection during hepatobiliary surgery can disrupt small vasculature or bile ducts, which could be managed difficultly. Sealants are helpful tools to achieve better hemostasis. The aim of this study is to analyze the hemostatic efficiency of four modern sealants in a porcine model. In this study, 40 landrace pigs were assigned equally to the control (without sealant) and four sealant groups. Standardized liver resection and splenic lesions were performed and left without using sealant (control) or treated with one of the following sealants: TachoSil® , Tissucol Duo® , Coseal® , and FloSeal® . We measured relative and absolute bleeding times (seconds) as well as total blood loss (g) in a maximum observation time of 300 s. Sealants could show a significantly improved hemostasis comparing to the control group. However, hemostasis was heterogeneous among the sealant groups (liver resection: 60%-100%, spleen injury: 70%-100%). The mean blood loss decreased significantly using sealants comparing to control group (liver resection: 6-120 fold, spleen injury: 2.5-36 fold). The hemostatic time in groups that achieved complete hemostasis was different in each sealant group (liver resection: 30-166 s, spleen injury: 60-180 s). We conclude that the hemostatic efficacy of modern sealants is impressive but heterogeneous in liver resection or splenic lesion. To maximize the effectiveness of these tools, the indication of each sealant should be carefully considered in individual settings by the surgeons. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1307-1316, 2018.
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Hemostasis Quirúrgica/métodos , Hemostáticos/farmacología , Hígado/cirugía , Bazo/cirugía , Animales , Tiempo de Sangría , Pérdida de Sangre Quirúrgica/prevención & control , Combinación de Medicamentos , Adhesivo de Tejido de Fibrina , Fibrinógeno , Hemostasis , Laceraciones , Hígado/lesiones , Perfusión , Bazo/lesiones , Sus scrofa , Porcinos , TrombinaRESUMEN
One of the widely accepted adjunctive agents in the variety of surgical modalities are sealants. Our study aim was to compare four commonly used modern sealants in a standardized experimental setting to assess their feasibility, and hemostatic efficacy in vascular anastomosis. Forty landrace pigs (weight: 24.7 ± 3.8 kg) were randomized into the control (n = 8) and four sealant groups; TachoSil® (n = 8), Tissucol Duo® (n = 8), Coseal® (n = 8), and FloSeal® (n = 8). After doing a portal vein end-to-end anastomosis as well as stitches of aortic incision, the sealants were applied on anastomotic site. The control group was left intact. In portal vein anastomosis, the sealants led to a complete hemostasis significantly better than control group. The mean of blood loss was also significantly reduced. In successful subgroups, there was a difference in the mean-time to reach complete hemostasis ranging from 15 s in Coseal® to 76 s in FloSeal® group (p < 0.05). In aortotomy experiments, except Tissucol Due®, which had insufficient hemostasis, other sealants led to a complete hemostasis. The mean blood loss was significantly reduced in sealants groups as well. The four sealants are effective in reducing the suture-hole bleeding in portal vein anastomosis. However, the hemostatic potential is heterogeneous among sealants. This means that "one-size-fits-all" approach is not appropriate for application of sealants in diversity of vascular surgery and it should be based on the type and the severity of injury and the structure of tissue. Comparison of hemostasis efficacy of four modern sealants (TachoSil®, Tissucol Duo®, Coseal®, and FloSeal®) in vascular anastomosis in porcine model. The figures below show the total blood loss (g) in the control and sealant groups after aortotomy (left) and portal vein anastomosis (right). The mean of blood loss decreased significantly by the usage of sealants in both experiment groups as compared to control group (*: p < 0.05; sealant groups vs. control group). 1. The right column shows the mean of blood loss (g) in all experiments in each group. 2. The middle column presents the subgroup with unsuccessful hemostasis at the end of observation time (Tmax = 20 sec. for aortotmy and 300 sec. for portal vein anastomosis). 3. The left column shows mean of total blood loss in subgroups with successful hemostasis during observation time (20 sec for aortotomy and 300 sec for portal vein).
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Adhesivo de Tejido de Fibrina , Fibrinógeno , Hemorragia/prevención & control , Polietilenglicoles , Trombina , Anastomosis Quirúrgica/efectos adversos , Animales , Aorta Abdominal/cirugía , Combinación de Medicamentos , Hemorragia/etiología , Hemostasis , Hemostasis Quirúrgica/instrumentación , Hemostáticos , Masculino , Vena Porta/cirugía , Hemorragia Posoperatoria/prevención & control , PorcinosRESUMEN
BACKGROUND: Surgical residency has the reputation of being arduous and stressful. We sought to determine the stress levels of surgical residents, the major causes of stress and the coping mechanisms used. METHODS: We developed and distributed a survey among surgical residents across Canada. RESULTS: A total of 169 participants responded: 97 (57%) male and 72 (43%) female graduates of Canadian (83%) or foreign (17%) medical schools. In all, 87% reported most of the past year of residency as somewhat stressful to extremely stressful, with time pressure (90%) being the most important stressor, followed by number of working hours (83%), residency program (73%), working conditions (70%), caring for patients (63%) and financial situation (55%). Insufficient sleep and frequent call was the component of residency programs that was most commonly rated as highly stressful (31%). Common coping mechanisms included staying optimistic (86%), engaging in enjoyable activities (83%), consulting others (75%) and exercising (69%). Mental or emotional problems during residency were reported more often by women (p = 0.006), who were also more likely than men to seek help (p = 0.026), but men reported greater financial stress (p = 0.036). Foreign graduates reported greater stress related to working conditions (p < 0.001), residency program (p = 0.002), caring for family members (p = 0.006), discrimination (p < 0.001) and personal and family safety (p < 0.001) than Canadian graduates. CONCLUSION: Time pressure and working hours were the most common stressors overall, and lack of sleep and call frequency were the most stressful components of the residency program. Female sex and graduating from a non-Canadian medical school increased the likelihood of reporting stress in certain areas of residency.
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Internado y Residencia/organización & administración , Estrés Psicológico/epidemiología , Tolerancia al Trabajo Programado/psicología , Carga de Trabajo , Adulto , Canadá , Estudios Transversales , Educación de Postgrado en Medicina/organización & administración , Femenino , Cirugía General/educación , Hospitales de Enseñanza , Humanos , Satisfacción en el Trabajo , Masculino , Evaluación de Necesidades , Satisfacción Personal , Encuestas y Cuestionarios , Factores de Tiempo , Adulto JovenRESUMEN
OBJECTIVES: Owing to an imbalance between demand and supply, which is more prominent in pediatric transplant, every year more patients lose their lives on waiting lists. In addition to the use of deceased-donor split and living-donor organs, xenotransplant could provide a solution if associated problems, such as immunologic and physiologic ones, are solved. This study sought to analyze the surgical aspects for liver xenotransplant in a porcine model. MATERIALS AND METHODS: Landrace pigs (n=22, 23 to 37 kg) underwent a laparotomy under general anesthesia. The hepatic hilum was prepared and the common bile ducts, common hepatic artery, portal vein, supra- and infrahepatic inferior vena cava were identified. The length and diameter of each vessel and bile duct and the weight of the liver were measured. RESULTS: Pearson tests showed a clear correlation between the increase of the pigs' weight and the livers' weight, and the length of the vessels and the bile ducts. We did not find a clear correlation between the increase of the pigs' liver weight and the diameters of the vessels and the bile duct. CONCLUSIONS: As the first reporting, this study on xenotransplants from the surgical point of view, we postulate that it could be possible to estimate the size of the liver and the proper length of its vessels and bile duct by weighing only the pigs. It was not feasible to match the diameter of mentioned structures by the livers' weight. However, the weight of pig's liver as well as vascular anatomy of pigs appeared to be suitable alternative for the human liver.
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Tamaño Corporal , Trasplante de Hígado/métodos , Hígado/anatomía & histología , Trasplante Heterólogo/métodos , Animales , Conducto Colédoco/anatomía & histología , Conducto Colédoco/cirugía , Supervivencia de Injerto , Arteria Hepática/anatomía & histología , Arteria Hepática/cirugía , Humanos , Hígado/cirugía , Trasplante de Hígado/tendencias , Tamaño de los Órganos , Vena Porta/anatomía & histología , Vena Porta/cirugía , Sus scrofa , Donantes de Tejidos , Trasplante Heterólogo/tendencias , Vena Cava Inferior/anatomía & histología , Vena Cava Inferior/cirugíaRESUMEN
BACKGROUND: Microdialysis (MD) can detect organ-related metabolic changes before they become measurable in plasma through the biochemical parameters. This study aims to evaluate the early detection of metabolic changes during experimental kidney transplantation (KTx). MATERIAL AND METHODS: During preparation of 8 donor kidneys, one MD catheter was inserted in the renal cortex and samples were collected. After a 6-hour cold ischemia time (CIT), kidneys were implanted in the 8 recipient pigs. Throughout the warm ischemia time (WIT) and after reperfusion, kidneys were monitored. The interstitial glucose, lactate, pyruvate, glutamate, and glycerol concentrations were evaluated. RESULTS: A significant decline in glucose level was observed at the end of CIT. The lactate level was reduced to the minimum point of 0.35 ± 0.08 mmol/L in CIT. After reperfusion, lactate values raised significantly. During the WIT, the pyruvate level increased, continued until the end of the WIT. For glutamate, a steady increase was noted during explantation, CIT, WIT, and early reperfusion phases. The increase of glycerol value continued in the early postreperfusion, which was then followed by a sharp decline. CONCLUSION: MD is a fast and simple minimally invasive method for measurement of metabolic substrates in renal parenchyma during KTx. MD offers the option of detecting minor changes of interstitial glucose, lactate, pyruvate, glutamate, and glycerol in every stage of KTx. Through the use of MD, metabolic changes can be continuously monitored during the entire procedure of KTx.
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Supervivencia de Injerto/fisiología , Trasplante de Riñón/efectos adversos , Riñón/metabolismo , Microdiálisis , Monitoreo Intraoperatorio/métodos , Animales , Isquemia Fría , Diagnóstico Precoz , Glucosa/metabolismo , Ácido Glutámico/metabolismo , Glicerol/metabolismo , Ácido Láctico/metabolismo , Modelos Animales , Ácido Pirúvico/metabolismo , Reproducibilidad de los Resultados , PorcinosRESUMEN
BACKGROUND: Little is known about donors' perception and psychologic impact of the physical changes that occur after (open) living donor hepatectomy. The aim of this study was to examine the body image and scar satisfaction after donor hepatectomy and to measure the relationship to postdonation quality of life. METHODS: Questionnaires measuring body image, cosmesis, and health-related quality of life were administered to 142 adults who underwent right lobe living donor hepatectomy between 2000 and 2007. RESULTS: Liver donors reported a significantly lower body image and lower cosmetic satisfaction with their scar when compared with published data on donors who underwent open nephrectomy. Donors' predonation health concerns and the perception that the recipient was engaging in risky behavior posttransplant were associated with lower postdonation body image scores. In addition, younger age and non-white ethnicity were associated with lower cosmetic scores after donation. Donors with a lower perception of body image and cosmesis reported lower physical and mental health, based on scores on the 36-item Short-Form Health Survey health-related quality of life index, and significantly greater interference in both spousal relationships and their sex life. Younger donors and donors with perioperative complications were also more likely to report decreased confidence after donation. CONCLUSION: There are unique risk factors that predict a decreased perception of body image and cosmesis postdonation that may be useful in the donor evaluation process. Donors identified to be at risk for the development of a low perception of body image and cosmesis may require close follow-up and additional psychiatric services during the donation process.
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Imagen Corporal , Hepatectomía/psicología , Donadores Vivos , Percepción , Autoimagen , Adulto , Anciano , Estudios Transversales , Escolaridad , Femenino , Encuestas Epidemiológicas , Hepatectomía/economía , Humanos , Renta , Masculino , Persona de Mediana Edad , Satisfacción Personal , Calidad de Vida , Encuestas y CuestionariosRESUMEN
BACKGROUND: In 2002, the New York State Committee on Quality Improvement in Living Liver Donation prohibited live liver donation for potential recipients with Model for End-stage Liver Disease (MELD) scores greater than 25. Despite the paucity of evidence to support this recommendation, many centers in North America remain reluctant to offer living donor (LD) to patients with moderate to high MELD scores. METHODS: We analyzed 271 consecutive adult-to-adult right lobe LD liver transplants performed at our institution between 2002 and 2008 to study the relationship, between recipient MELD scores and the outcome of LD liver transplantation. The recipients were categorized according to their MELD score into a low (Low: <25)and high (Hi: >or=25) MELD group. We compared short-term donor morbidity, graft loss within 30 days, length of hospital stay, biochemical markers of hepatocyte injury and graft function, and 90 day posttransplant complications including infection, rejection, bleeding, and renal failure. Long-term posttransplant outcome was measured by graft and patient survival after 1-, 3-, and 5-years. RESULTS: Donor and recipient characteristics were similar between groups. Donor outcomes were similar in both groups. Peak recipient aspartat aminotransferase, alanine aminotransferase, and length of hospital stay were similar between both groups. The proportional decrease in postoperative INR and creatinine within the first week was greater in the high versus low MELD score group. High MELD score recipients had more frequent postoperative pneumonia (Low: 2.2% vs. Hi: 14%, P = 0.003), while no differences were observed in rates of biliary complications, rejection, renal failure, or overall infections. Recipients with a MELD <25 versus >or=25 had a similar 1-year (Low: 92% vs. Hi: 83%), 3-year (Low: 86% vs. Hi: 80%), and 5-year (Low: 78% vs. Hi: 80%) graft survival after LD liver transplantation (P = 0.51). CONCLUSION: LD liver transplantation can provide excellent graft function and survival rates in high MELD score recipients. Thus, when deceased donor organs are scare, a high MELD score alone should not be an absolute contraindication to living liver donation.
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Fallo Hepático/cirugía , Trasplante de Hígado , Donadores Vivos , Adulto , Supervivencia sin Enfermedad , Femenino , Supervivencia de Injerto , Humanos , Fallo Hepático/clasificación , Fallo Hepático/mortalidad , Fallo Hepático/fisiopatología , Trasplante de Hígado/mortalidad , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias , Tasa de Supervivencia , Adulto JovenRESUMEN
Many centers require a minimal graft to body weight ratio (GBWR) >or= 0.8 as an arbitrary threshold to proceed with right-lobe living donor liver transplantation (RL-LDLT), and there is often hesitancy about transplanting lower volume living donor (LD) liver grafts into sicker patients. The data supporting this dogma, based on the early experience with RL-LDLT at Asian centers, are weak. To determine the effect of LD liver volume in the modern era, we investigated the impact of GBWR on the outcome of RL-LDLT with a GBWR as low as 0.6 at the University of Toronto. Between April 2000 and September 2008, 271 adult-to-adult RL-LDLT procedures and 614 deceased donor liver transplants were performed. Twenty-two living donor liver transplantation (LDLT) cases with a GBWR of 0.59 to 0.79 (group A) were compared with 249 LDLT cases with a GBWR >or= 0.8 (group B) and with 66 full-graft deceased donor liver transplants (group C), who were matched 3:1 according to donor and recipient age, Model for End-Stage Liver Disease score, and presence of hepatitis C and hepatocellular carcinoma with the low-GBWR group. Portal vein shunts were not used. Markers of reperfusion injury [aspartate aminotransferase (AST) and alanine aminotransferase (ALT)], graft function (international normalized ratio and bilirubin), complications graded by the Clavien score, and graft and patient survival were compared. As expected, LD recipients had a significantly shorter cold ischemia time (94 +/- 43 minutes for A, 96 +/- 57 minutes for B, and 453 +/- 152 minutes for C, P = 0.0001). However, the peak AST, peak ALT, absolute decrease in the international normalized ratio, day 7 bilirubin level, postoperative creatinine clearance, complication rate graded by the Clavien score, and median hospital stay were similar in all groups. The rate of biliary complications was higher with LD grafts than deceased donor grafts (19% for A versus 10% for B and 0% for C, P = 0.2). Patient survival was similar in all groups at 1, 3, and 5 years (91% for A versus 89% for B and 93% for C at 1 year, 87% for A versus 81% for B and 89% for C at 3 years, and 83% for A versus 81% for B and 87% for C at 5 years, P = 0.63). A Cox proportional regression analysis revealed only hepatitis C virus as a risk factor for poorer graft survival and not GBWR as a continuous or categorical variable. In conclusion, we found no evidence of inferior outcomes with smaller size grafts versus larger size LD grafts or full-size deceased donor grafts. Further studies are warranted to examine the factors affecting the function of smaller grafts for living liver donation and thereby define the safe lower limits for transplantation.
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Peso Corporal , Supervivencia de Injerto , Trasplante de Hígado , Hígado/cirugía , Donadores Vivos , Selección de Paciente , Adolescente , Adulto , Bases de Datos como Asunto , Medicina Basada en la Evidencia , Femenino , Humanos , Estimación de Kaplan-Meier , Hígado/anatomía & histología , Trasplante de Hígado/efectos adversos , Trasplante de Hígado/mortalidad , Masculino , Persona de Mediana Edad , Tamaño de los Órganos , Guías de Práctica Clínica como Asunto , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Medición de Riesgo , Factores de Riesgo , Factores de Tiempo , Resultado del Tratamiento , Adulto JovenRESUMEN
BACKGROUND: Efficacy and long-term outcome of antiviral therapy for recurrent hepatitis C after liver transplantation is poorly defined. AIM: This study aimed at assessing the efficacy of antiviral therapy regarding sustained hepatitis C virus (HCV) clearance, liver histology, and patient survival. METHODS: We retrospectively reviewed all 446 patients who received a liver allograft at our institution for HCV-related cirrhosis between January 1992 and December 2006. Two hundred thirty-two patients (52%) were eligible for antiviral therapy based on predefined criteria (Metavir stage > or =1 and/or grade > or =2; protocol biopsies). One hundred seventy-two patients (39%) had no contraindication for treatment, received more than or equal to 1 dose of interferon-alpha-based combination therapy, and form the basis of this analysis. Therapy was aimed for 48 weeks; median posttreatment follow-up was 68 months. RESULTS: The overall sustained virological response (SVR) rate was 50% (genotype 1/4: 40%; genotype 2/3: 76%). SVR was higher on cyclosporine A (CsA) (56%) than on tacrolimus (44%, P=0.05), largely because of a lower relapse rate (6% vs. 19%, P=0.01). In multivariate analysis, genotype 2/3, CsA use, donor age, and pretreatment necroinflammatory activity were independently associated with SVR. SVR significantly improved histology and long-term survival (actuarial 5-year survival 96% vs. 69% in nonresponders, P<0.0001). CONCLUSION: Antiviral therapy of recurrent hepatitis C after liver transplantation is able to clear HCV in half the patients, more likely on CsA than on tacrolimus, and markedly improves outcome.
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Antivirales/uso terapéutico , Hepatitis C/tratamiento farmacológico , Hepatitis C/cirugía , Fallo Hepático/cirugía , Trasplante de Hígado/fisiología , Corticoesteroides/uso terapéutico , Adulto , Anciano , Tolerancia a Medicamentos , Femenino , Estudios de Seguimiento , Genotipo , Hepatitis C/genética , Hepatitis C/mortalidad , Humanos , Inmunosupresores/uso terapéutico , Interferón alfa-2 , Interferón-alfa/uso terapéutico , Fallo Hepático/virología , Trasplante de Hígado/mortalidad , Masculino , Persona de Mediana Edad , Polietilenglicoles/uso terapéutico , Proteínas Recombinantes , Recurrencia , Estudios Retrospectivos , Ribavirina/uso terapéutico , Tasa de Supervivencia , Tacrolimus/uso terapéutico , Factores de Tiempo , Donantes de Tejidos/estadística & datos numéricos , Resultado del TratamientoRESUMEN
The ability to inform prospective donors of the psychosocial risks of living liver donation is currently limited by the scant empirical literature. The present study was designed to examine donor perceptions of the impact of donation on financial, vocational, and interpersonal life domains and identify demographic and clinical factors related to longer recovery times and greater life interference. A total of 143 donors completed a retrospective questionnaire that included a standardized measure of life interference [Illness Intrusiveness Rating Scale (IIRS)] and additional questions regarding the perceived impact of donation. Donor IIRS scores suggested that donors experience a relatively low level of life interference due to donation [1.60 +/- 0.72, with a possible range of 1 ("not very much" interference) to 7 ("very much" interference)]. However, approximately 1 in 5 donors reported that donating was a significant financial burden. Logistic regression analysis revealed that donors with a psychiatric diagnosis at or prior to donation took longer to return to their self-reported predonation level of functioning (odds ratio = 3.78, P = 0.016). Medical complications were unrelated to self-reported recovery time. Multiple regression analysis revealed 4 independent predictors of greater life interference: less time since donation (b = 0.11, P < 0.001), income lower than CAD$100,000 (b = 0.28, P = 0.038), predonation concerns about the donation process (b = 0.24, P = 0.008), and the perception that the recipient is not caring for the new liver (b = 0.12, P = 0.031). In conclusion, life interference due to living liver donation appears to be relatively low. Donors should be made aware of risk factors for greater life disruptions post-surgery and of the potential financial burden of donation.
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Costo de Enfermedad , Empleo , Hepatectomía , Donadores Vivos/psicología , Complicaciones Posoperatorias , Adulto , Anciano , Canadá/epidemiología , Estudios Transversales , Femenino , Costos de la Atención en Salud , Hepatectomía/economía , Hepatectomía/psicología , Hepatectomía/estadística & datos numéricos , Humanos , Modelos Logísticos , Masculino , Trastornos Mentales/epidemiología , Persona de Mediana Edad , Complicaciones Posoperatorias/economía , Complicaciones Posoperatorias/epidemiología , Complicaciones Posoperatorias/psicología , Valor Predictivo de las Pruebas , Psicología , Factores de Riesgo , Adulto JovenRESUMEN
We studied the role of donor and recipient age in transplantation/ischemia-reperfusion injury (TIRI) and short- and long-term graft and patient survival. Eight hundred twenty-two patients underwent deceased donor liver transplantation, with 197 donors being > or = 60 years old. We evaluated markers of reperfusion injury, graft function, and clinical outcomes as well as short- and long-term graft and patient survival. Increased donor age was associated with more severe TIRI and decreased 3- and 5-year graft survival (73% versus 85% and 72% versus 81%, P < 0.001) and patient survival (77% versus 88% and 77% versus 82%, P < 0.003). Hepatitis C virus (HCV) infection and recipient age were the only independent risk factors for graft and patient survival in patients receiving an older graft. In the HCV(+) cohort (297 patients), patients > or = 50 years old who were transplanted with an older graft versus a younger graft had significantly decreased 3- and 5-year graft survival (68% versus 83% and 64% versus 83%, P < 0.009). In contrast, HCV(+) patients < 50 years old had similar 3- and 5-year graft survival if transplanted with either a young graft or an old graft (81% versus 82% and 81% versus 82%, P = 0.9). In conclusion, recipient age and HCV status affect the graft and patient survival of older livers. Combining older grafts with older recipients should be avoided, particularly in HCV(+) patients, whereas the effects of donor age can be minimized in younger recipients.
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Envejecimiento , Hepatitis C/etiología , Hepatitis C/terapia , Fallo Hepático/terapia , Trasplante de Hígado/métodos , Donantes de Tejidos , Factores de Edad , Anciano , Estudios de Cohortes , Femenino , Supervivencia de Injerto , Humanos , Fallo Hepático/cirugía , Trasplante de Hígado/efectos adversos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Recurrencia , Estudios Retrospectivos , Resultado del TratamientoRESUMEN
Over the past 4 decades, the surgical techniques of liver transplantation (LTx) have permanently evolved and been modified. Among these, the modified piggyback (MPB) technique by Belghiti offers specific advantages. The objective of this study was to present our single-center experience with the MPB technique in 500 cases. Recipients' perioperative data were prospectively collected and evaluated. Postoperative and specific complications, stay in the intensive and intermediate care unit, and the mortality rate with cause of death were analyzed. Most recipients were classified as Child C (49.1%). For the patients who underwent LTx for the first time, alcoholic (23.9%) and viral (22.2%) cirrhosis and hepatocellular carcinoma (15.1%) were the prevalent indications. The overall median warm ischemia time, anastomosis duration, and operative time were 45, 108, and 320 minutes, respectively. The median intraoperative blood loss was 1500 mL. A venovenous bypass was never needed to maintain hemodynamic stability. Only in a few cases was temporary inferior vena cava clamping necessary. Most prominent surgical complications were hemorrhage, hematoma, and wound dehiscence. Renal failure occurred in 6.2% of patients. The overall median stay in the intensive and intermediate care unit was 14 days. The mortality rates within 30 and 90 days were 6.3% and 13.3%, respectively. No technique-related death occurred. The MPB technique by Belghiti is a feasible and simple LTx technique. The caval flow is preserved during the anhepatic phase, and this minimizes the need for venovenous bypass or portocaval shunt. This technique requires only 1 caval anastomosis, which is easy to perform with a short anhepatic phase. To minimize the risk of outflow obstruction, attention should be paid by doing a wide cavocavostomy cranially to the donor inferior vena cava in a door-lock manner. This technique can be applied in almost all patients undergoing LTx for the first time and liver retransplantation as well.
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Hepatectomía , Hepatopatías/cirugía , Trasplante de Hígado/métodos , Vena Porta/cirugía , Vena Cava Inferior/cirugía , Adolescente , Adulto , Anciano , Anastomosis Quirúrgica , Niño , Preescolar , Cuidados Críticos , Femenino , Mortalidad Hospitalaria , Humanos , Lactante , Tiempo de Internación , Circulación Hepática , Hepatopatías/mortalidad , Hepatopatías/fisiopatología , Trasplante de Hígado/efectos adversos , Trasplante de Hígado/mortalidad , Masculino , Persona de Mediana Edad , Vena Porta/fisiopatología , Estudios Prospectivos , Índice de Severidad de la Enfermedad , Factores de Tiempo , Resultado del Tratamiento , Vena Cava Inferior/fisiopatología , Adulto JovenRESUMEN
BACKGROUND: Our aim was to compare cardiovascular and stress response to robotic technology during thoracoscopic mobilization and anastomosis of the esophagus vs the conventional open approach. DESIGN: Randomized experimental study. SETTING: Department of Experimental Surgery, University of Heidelberg. SUBJECTS: Twelve pigs randomized to undergo robotic or conventional surgery (6 animals each). INTERVENTIONS: Fundus rotation gastroplasty followed by esophageal mobilization and intrathoracic anastomosis by conventional or robotic surgery. MAIN OUTCOME MEASURES: Mean arterial pressure, central venous pressure, mean pulmonary arterial pressure, pulmonary capillary wedge pressure, cardiac output, pulmonary vascular resistance, partial oxygen pressure, alveolar-arterial difference in partial pressure of oxygen, and arteriovenous oxygen content difference measured preoperatively, during esophageal manipulation, and 30 minutes after operation. Operative stress was assessed by plasma levels of cortisol and substance P. RESULTS: Hemodynamic measures showed higher intraoperative central venous pressure and pulmonary vascular resistance in the open surgery group, whereas cardiac output was significantly decreased compared with the robotic group. Blood gas values showed significant deterioration during esophageal manipulation with open surgery in contrast to the robotic group. Substance P and cortisol levels were significantly higher with the open approach. CONCLUSIONS: The robot-assisted approach is associated with improved intraoperative cardiopulmonary function and seems to be a less stressful technique.
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Esofagectomía/métodos , Hemodinámica/fisiología , Robótica , Cirugía Torácica Asistida por Video/métodos , Toracotomía/métodos , Anastomosis Quirúrgica/métodos , Animales , Análisis de los Gases de la Sangre , Citocinas/sangre , Modelos Animales de Enfermedad , Ensayo de Inmunoadsorción Enzimática , Esofagectomía/instrumentación , Femenino , Masculino , Procedimientos Quirúrgicos Mínimamente Invasivos/métodos , Monitoreo Intraoperatorio/métodos , Estrés Oxidativo , Probabilidad , Circulación Pulmonar/fisiología , Intercambio Gaseoso Pulmonar , Distribución Aleatoria , Sensibilidad y Especificidad , Sustancia P/sangre , Porcinos , Cirugía Torácica Asistida por Video/instrumentaciónRESUMEN
Partial cholecystectomy (PC) is an alternative choice to standard cholecystectomy in situations with increased risk of Calot's components injury. We reported our experience with the patients treated with PC and reviewed the literature. Fifty-four patients with complex acute cholecystitis underwent PC, including conventional partial cholecystectomy (CPC; n = 48) and laparoscopic partial cholecystectomy (LPC; n = 6). The clinical diagnosis was verified by ultrasonography. In addition, we reviewed 1190 published cases (1972-2005) who underwent a "nonconventional" surgery for severe cholecystitis, including cholecystostomy, CPC, or LPC. Review of the literature, including our cases, showed a male:female ratio of 1.3:1. The major operative indication was severe acute cholecystitis. Procedures included cholecystostomy (65.8%) and PC (34.2%). In the follow-up (n = 1190), biliary leak (4.8%), retained stones (4.6%), recurrent symptoms (2.3%), wound infections (1.9%), persistent biliary fistula (0.9%), and prolonged biliary drainage (0.2%) were found, with an overall mortality rate of 9.4 per cent. In 133 patients, because of postoperative complications (e.g., recurrent symptoms, remaining common bile duct stones, or persistence of bile fistula), reoperation was necessary, including 121 cases (90.1%) of cholecystectomy, whereas the other 11 patients underwent other procedures such as common bile duct exploration or closure of the fistula. The surgical trend for complex acute cholecystitis treatment has been changed from only cholecystostomy to a spectrum of cholecystostomy, CPC, and LPC with the progressive increase of PC. The proportion of the LPC compared with CPC has also increased during recent years. It seems that PC is a safe procedure for treating complicated acute cholecystitis. Whether the indication and need for alternative techniques to standard cholecystectomy is changing should be evaluated in future studies.
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Colecistectomía/métodos , Colecistitis Aguda/cirugía , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Colecistitis Aguda/complicaciones , Colecistitis Aguda/diagnóstico , Servicio de Urgencia en Hospital , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Resultado del TratamientoRESUMEN
Wandering spleen, which is defined as a spleen without peritoneal attachments, is a rare disease and a delay in the clinical and/or radiological diagnosis may lead to splenic torsion, infarction, and necrosis. Owing to the physiologic importance of the spleen, especially in children, and the risk of postsplenectomy sepsis, early diagnosis and splenopexy are recommended. In the present article, we describe the results of our management of this rare problem on six patients, and we review all available literature from 1895 to 2005. Briefly, our technique includes flap creation from parietal peritoneum and settlement of spleen in the fossa splenica. Free edges of this flap are stitched to the stomach and the left end of transverse colon and the beginning of the descending colon. The body of the stomach was stitched to the abdominal wall to prevent gastric volvulus, while the fundus region was fixed to the diaphragm to support the spleen. Finally, an omental patch was stitched to the intact abdominal wall above the flap. In conclusion, the procedure of splenopexy without using mesh is considered to be a safe and curative modality for wandering spleen without imposing any undue risk of infection or foreign material reaction.
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Bazo/cirugía , Ectopía del Bazo/cirugía , Adolescente , Adulto , Niño , Femenino , Humanos , Laparoscopía , Masculino , Mallas QuirúrgicasRESUMEN
INTRODUCTION: A qualified surgical team is required to perform liver transplantation (LTX). Growing numbers of transplants at transplant centers and large variations of transplant frequencies make a continuous education to train young surgeons on this complex field of hepato-biliary surgery mandatory, both from the organizational and motivational point of view (job enrichment and professional growth). On the contrary, perioperative patient risk management is of major importance in surgical practice and given growing organizational concern in hospitals. A retrospective clinical study was performed to describe and evaluate the process of surgical training for orthotopic LTX. Patient risks associated with or caused by the education process in clinical LTX were analyzed. METHODS: Perioperative patient data and details of surgical strategies were collected for 155 consecutive LTX carried out at a single center. Operative and follow-up data were correlated with the degree of surgical experience of the first operating surgeon. Two groups were defined. In group A, transplant surgeons with >30 personally performed LTXs (n = 3) and in group B, transplant fellows with >30 assistance in LTx (n = 3) performed the operations. All LTX operations were standardized based on modified piggyback technique described by Belghiti. Group B operations were performed under close supervision/assistance of the ''transplant surgeon.'' Selection of patients for exposure to surgical training was based on the pre-operative estimation of surgical difficulty. Operative time, blood loss, liver function, post-operative morbidity, and survival rate data were compared in both groups. RESULTS: A total of 155 LTX were performed in 131 patients and were analyzed, and 106 operations (68.3%) were performed by group A and 49 operations (31.6%) were performed by transplant fellows under supervision (group B). No significant differences concerning mean patient age, distribution of type of disease, operating time, the Model for Endstage Liver Disease (MELD) score and frequency of category Child A, B and C were detected between groups. Overall post-operative complication rate was 21.9% (n = 34). Transplant surgeons and transplant fellows had 19.8% (n = 21) and 26.5% (n = 13) of complication rate, respectively (p > 0.05). Overall patients survival rate was 94% and 89% at 45 days for the patients operated in groups A and B, respectively (p > 0.05). Survival rate, blood loss, intraoperative transfusion requirements and operating time did not differ significantly between groups. CONCLUSIONS: Liver transplantation requires team performance to minimize patient risks. Incidence of complications was associated with the severity of disease but not with the education process. It could be demonstrated that with careful patient selection and supervision of the transplant fellow with a more experienced surgeon, the results are equal to those obtained when the experienced transplant surgeon is the prime operator.