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ABSTRACT Objective To assess knowledge on sudden infant death syndrome (SIDS) prevention among postpartum women who received prenatal care in public and private services in Rio Grande, Rio Grande do Sul, Brazil, in 2019. Methods A cross-sectional study was conducted with postpartum women who gave birth in that municipality in 2019; the outcome was the indication of incorrect sleeping position (side/supine position) to prevent SIDS; the chi-square test was used to compare proportions between those who underwent prenatal care in public and private services. Results Among all 2,195 postpartum women, 67.7% (95%CI 65.7;69.6) were unaware of the position that prevents SIDS, 71.6% were public care service users; 77.8% of them feared choking/suffocation; 1.9% were informed about SIDS during prenatal care; doctors/nurses (70.5%) and grandmothers (65.1%) were influential regarding the baby's sleeping position. Conclusion Most postpartum women were unaware of the sleeping position that prevents SIDS, especially those receiving care in the public sector; in general, this subject is not discussed in prenatal care.

RESUMEN Objetivo Evaluar el conocimiento sobre la prevención del síndrome de muerte súbita del lactante (SMSL) entre puérperas que realizaron prenatal en servicios públicos y privados en Rio Grande, Rio Grande do Sul, Brasil, en 2019. Métodos Estudio transversal, con puérperas que dieron a luz en Rio Grande, en 2019; el resultado consistió en la indicación de posición incorrecta para dormir (lado/supino) para prevenir el SMSL; utilizando chi-cuadrado, se compararon las proporciones entre mujeres que recibieron atención prenatal en servicios públicos y privados. Resultados Entre las 2.195 puérperas, 67,7% (IC95% 65,7;69,6) desconocían como se previene el SMSL, estando el 71,6%, en la red pública; 77,8% temía asfixiarse/ahogarse; el 1,9% fue informado sobre el SMSL durante el prenatal; los médicos(as)/enfermeros(as) (70,5%) y los abuelos (65,1%) influyeron en la posición para dormir del bebé. Conclusión La mayoría de las puérperas desconocían la posición que previene el SMSL, especialmente en la red pública; en general, este tema no está cubierto en la atención prenatal.

RESUMO Objetivo Avaliar o conhecimento sobre prevenção da síndrome da morte súbita do lactente (SMSL) entre puérperas com pré-natal realizado nos serviços público e privado de Rio Grande, Rio Grande do Sul, Brasil, 2019. Métodos Estudo transversal, com puérperas do município; seu desfecho constituiuse da indicação de posição incorreta para dormir (decúbito lateral ou dorsal), visando prevenir a SMSL; utilizou-se o teste qui-quadrado para comparar proporções do desfecho e de exposição entre puérperas que realizaram pré-natal nos serviços público e privado. Resultados De 2.195 puérperas, 67,7% (IC95% 65,7;69,6), majoritariamente atendidas na rede pública (71,6%), desconheciam a posição preventiva da SMSL; 77,8% temiam engasgo/afogamento; 1,9% foram informadas sobre SMSL no pré-natal; médicos(as)/enfermeiros(as) (70,5%) e avós (65,1%) mostraram-se influentes na decisão sobre como posicionar o bebê adormecido. Conclusão A maioria das puérperas, especialmente as atendidas na rede pública, desconhecia a posição que previne SMSL; geralmente, o tema não é abordado no pré-natal.

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Abstract Background The efficacy and safety profiles of prone ventilation among intubated Coronavirus Disease 2019 (COVID-19) patients remain unclear. The primary objective was to examine the effect of prone ventilation on the ratio of arterial partial pressure of oxygen to fraction of inspired oxygen (PaO2/FiO2) in intubated COVID-19 patients. Methods Databases of MEDLINE, EMBASE and CENTRAL were systematically searched from inception until March 2021. Case reports and case series were excluded. Results Eleven studies (n = 606 patients) were eligible. Prone ventilation significantly improved PaO2/FiO2 ratio (studies: 8, n = 579, mean difference 46.75, 95% CI 33.35‒60.15, p < 0.00001; evidence: very low) and peripheral oxygen saturation (SpO2) (studies: 3, n = 432, mean difference 1.67, 95% CI 1.08‒2.26, p < 0.00001; evidence: ow), but not the arterial partial pressure of carbon dioxide (PaCO2) (studies: 5, n = 396, mean difference 2.45, 95% CI 2.39‒7.30, p= 0.32; evidence: very low), mortality rate (studies: 1, n = 215, Odds Ratio 0.66, 95% CI 0.32‒1.33, p= 0.24; evidence: very low), or number of patients discharged alive (studies: 1, n = 43, Odds Ratio 1.49, 95% CI 0.72‒3.08, p= 0.28; evidence: very low). Conclusion Prone ventilation improved PaO2/FiO2 ratio and SpO2 in intubated COVID-19 patients. Given the substantial heterogeneity and low level of evidence, more randomized- controlled trials are warranted to improve the certainty of evidence, and to examine the adverse events of prone ventilation.

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BACKGROUND: The efficacy and safety profiles of prone ventilation among intubated Coronavirus Disease 2019 (COVID-19) patients remain unclear. The primary objective was to examine the effect of prone ventilation on the ratio of arterial partial pressure of oxygen to fraction of inspired oxygen (PaO2/FiO2) in intubated COVID-19 patients. METHODS: Databases of MEDLINE, EMBASE and CENTRAL were systematically searched from inception until March 2021. Case reports and case series were excluded. RESULTS: Eleven studies (n = 606 patients) were eligible. Prone ventilation significantly improved PaO2/FiO2 ratio (studies: 8, n = 579, mean difference 46.75, 95% CI 33.35‒60.15, p < 0.00001; evidence: very low) and peripheral oxygen saturation (SpO2) (studies: 3, n = 432, mean difference 1.67, 95% CI 1.08‒2.26, p < 0.00001; evidence: ow), but not the arterial partial pressure of carbon dioxide (PaCO2) (studies: 5, n = 396, mean difference 2.45, 95% CI 2.39‒7.30, p = 0.32; evidence: very low), mortality rate (studies: 1, n = 215, Odds Ratio 0.66, 95% CI 0.32‒1.33, p = 0.24; evidence: very low), or number of patients discharged alive (studies: 1, n = 43, Odds Ratio 1.49, 95% CI 0.72‒3.08, p = 0.28; evidence: very low). CONCLUSION: Prone ventilation improved PaO2/FiO2 ratio and SpO2 in intubated COVID-19 patients. Given the substantial heterogeneity and low level of evidence, more randomized- controlled trials are warranted to improve the certainty of evidence, and to examine the adverse events of prone ventilation.

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SUMMARY OBJECTIVE: The aim of this study was to evaluate the predictive factors for success following percutaneous nephrolithotomy in the supine position. METHODS: Patients who underwent percutaneous nephrolithotomy in the supine position from June 2011 to October 2018 were evaluated. Age, sex, body mass index, the American Society of Anesthesiologists physical status classification, hemoglobin level, number of previous surgeries, stone size, and the Guy's Stone Score were analyzed. Success was considered if no fragments were observed on the computed tomography scan on the first postoperative day. Univariate and multivariate analyses were performed to determine significant parameters. RESULTS: We evaluated 961 patients; of them, 483 (50.2%) underwent previous stone-related surgery, and 499 (51.9%) had Guy's Stone Score 3 or 4. The overall success rate in a single procedure was 40.7%, and complication rate was 13.7%. The univariate analysis showed that the maximum diameter of the stone (25.10±10 mm; p<0.001), previous percutaneous nephrolithotomy (OR 0.52; p<0.001), number of previous percutaneous nephrolithotomy (OR 0.15; p<0.001), the Guy's Stone Score (OR 0.28; p<0.001), and the number of tracts (OR 0.32; p<0.001) were significant. In the multivariate analysis, the number of previous percutaneous nephrolithotomy (OR 0.54; p<0.001) and the Guy's Stone Score (OR 0.25; p<0.001) were statically significant. CONCLUSIONS: Guy's Stone Score and the number of previous percutaneous nephrolithotomy are predictors of success with the supine position. Complex cases and with previous percutaneous interventions may require technical improvements to achieve higher stone-free rates.

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PURPOSE: High-quality evidence comparing supine to prone percutaneous nephrolithotomy (PCNL) for the treatment of complex stones is lacking. This study aimed to compare the outcomes of supine position (SUP) and prone position (PRO) PCNL. MATERIALS AND METHODS: A noninferior randomized controlled trial was performed according to the CONSORT (Consolidated Standards for Reporting Trials) criteria. The inclusion criteria were patients over 18 years of age with complex stones. SUP was performed in the Barts flank-free modified position. Except for positioning, all the surgical parameters were identical. The primary outcome was the difference in the success rate on the first postoperative day (POD1) between groups. The secondary outcome was the difference in the stone-free rate (SFR) on the 90th postoperative day (final SFR). A noninferiority margin of 15% was used. Demographic, operative, and safety variables were compared between the groups. Statistical significance was set at p <0.05. RESULTS: Overall, 112 patients were randomized and their demographic characteristics were comparable. The success rates on POD1 were similar (SUP: 62.5% vs PRO: 57.1%, p=0.563). The difference observed (-5.4%) was lower than the predefined limit. The final SFRs were also similar (SUP: 55.4% vs PRO: 50.0%, p=0.571). SUP had a shorter operative time (mean±SD 117.9±39.1 minutes vs 147.6±38.8 minutes, p <0.001) and PRO had a higher rate of Clavien ≥3 complications (14.3% vs 3.6%, p=0.045). CONCLUSIONS: Positioning during PCNL for complex kidney stones did not impact the success rates; consequently, both positions may be suitable. However, SUP might be associated with a lower high-grade complication rate.

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ABSTRACT Objective To evaluate the displacement of nerve structures according to the decubitus position of the patient in a magnetic resonance imaging (MRI) study. Methods MRI was performed at a radiology clinic in 20 patients in dorsal and right lateral decubitus. The measurement considered was the shortest distance between the dura mater and the medial wall of the pedicle. Results The largest measurement was 11.6 mm in left lateral decubitus, 12.2 mm in right lateral decubitus, 10.5 mm in right dorsal decubitus, and 9.2 mm in left dorsal decubitus. In some patients the space between the medial wall of the pedicle and the dura mater was larger when in lateral decubitus, while in others when in dorsal decubitus. The mean displacement of the measurements on the left was 1.14 mm and on the right 1.355 mm. Conclusions The structures moved on average little more than 1 mm in the positions studied. The positioning of the patient for surgery does not change the space to be approached, being the surgeon's choice according to his learning curve. Level of evidence II; Prospective study of lower quality.

RESUMO Objetivo Avaliar o deslocamento das estruturas nervosas conforme o decúbito do paciente em um estudo de Ressonância Nuclear Magnética (RNM). Métodos Foram realizadas RNM em 20 pacientes em uma clínica de radiologia em decúbito dorsal e lateral direito. A medida considerada será a menor distância entre a dura-máter e a parede medial do pedículo. Resultados A maior medida em decúbito lateral esquerdo foi 11,6 mm, em decúbito lateral direito foi 12,2 mm, em decúbito dorsal direito foi 10,5 mm e no esquerdo, 9,2 mm. O espaço entre a parede medial do pedículo é maior em decúbito lateral em alguns pacientes e, em outros, em decúbito dorsal. O deslocamento médio das medidas à esquerda foi 1,14 mm e à direita 1,355 mm. Conclusões As estruturas se deslocaram, em média, pouco mais de 1 mm nas posições estudadas. O posicionamento do paciente na cirurgia não muda o espaço a ser abordado, sendo de escolha do cirurgião, conforme a sua curva de aprendizado. Nível de evidência II; Estudo prospectivo de menor qualidade .

RESUMEN Objetivo Evaluar el desplazamiento de las estructuras nerviosas conforme al decúbito del paciente en un estudio de Resonancia Nuclear Magnética (RNM). Métodos Fueron realizadas RNM en 20 pacientes en una clínica de radiología en decúbito dorsal y lateral derecho. La medida considerada será la menor distancia entre la duramadre y la pared medial del pedículo. Resultados La mayor medida en decúbito lateral izquierdo fue 11,6 mm, en decúbito lateral derecho fue 12,2 mm, en decúbito dorsal derecho fue 10,5 mm y en el izquierdo, 9,2 mm. El espacio entre la pared medial del pedículo es mayor en decúbito lateral en algunos pacientes y, en otros, en decúbito dorsal. El desplazamiento promedio de las medidas a la izquierda fue 1,14 mm y a la derecha de 1,355 mm. Conclusiones Las estructuras se desplazaron, en promedio, poco más de 1 mm en las posiciones estudiadas. El posicionamiento del paciente en la cirugía no cambia el espacio a ser abordado, siendo la elección del cirujano conforme a su curva de aprendizaje. Nivel de evidencia II; Estudio prospectivo de menor calidad.

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ABSTRACT Purpose: This study aims to compare the anatomical success rates of vitrectomy and SF6 gas tamponade for macular hole surgery with and without postoperative face-down posturing. Methods: This was an observational, longitudinal, and retrospective case series analysis. The study included 52 eyes from 52 patients who underwent pars plana vitrectomy with trypan blue-assisted internal limiting membrane peeling and 25% SF6 tamponade for stages 2, 3, and 4 macular holes. After surgery, all patients were provided with a postoperative postural regimen: 31 patients were instructed not to maintain face-down posturing, whereas 21 were instructed to maintain face-down posturing for 7 days. The primary outcome measure was the macular hole closure rate. Statistical analysis was performed using Epi Info 7.1. Results: A total of 47 (90.3%) patients achieved hole closure. The nonface-down posturing group and face-down posturing group obtained closure rates of 90.3% and 90.4%, respectively; these rates were not significantly different. Statistical analysis revealed that no significant differences existed in sex, age, hole duration, hole stage, preoperative visual acuity, or postoperative visual acuity between the two groups. Conclusion: Our results suggest that macular hole surgery with the use of short duration gas (SF6) is safe and effective and that maintaining a postural orientation of nonface-down posturing is also safe. However, these recommendations should be assessed further in a prospective and randomized study to comprehensively delineate the associated benefits and risks.

RESUMO Objetivos: Comparar as taxas de sucesso anatômico da vitrectomia e tamponamento de gás SF6 na cirurgia de buraco macular com e sem a postura pronada pós-operatória. Métodos: Foi realizado um estudo observacional, longitudinal e retrospectivo de séries de casos. O estudo incluiu 52 olhos de 52 pacientes submetidos à vitrectomia posterior via pars-plana com peeling de membrana limitante interna auxiliada por azul trypan e tamponamento com gás SF6 a 25% para os estágios 2, 3 e 4 dos buracos maculares. Após a cirurgia, todos os pacientes foram orientados a manter um regime postural pós-operatório: 31 pacientes foram orientados a não realizar posição pronada de cabeça, enquanto 21 foram orientados a manter uma pronada pós-operatória por 7 dias. O objetivo principal foi a análise da taxa de fechamento do buraco macular. A análise estatística foi realizada usando Epi-Info 7.1. Resultados: Um total de 47 (90,3%) pacientes obtiveram fechamento do buraco macular. O grupo de postura não pronada e o grupo de postura pronada obtiveram taxas de fechamento de 90,3%, e 90,4%, respectivamente; essas taxas não foram significativamente diferentes. A análise estatística revelou que não houve diferenças significativas relacionadas ao gênero, idade, duração do buraco macular, estágio do buraco macular, acuidade visual corrigida pré e pós-operatória entre os dois grupos. Conclusão: Nossos resultados sugerem que a cirurgia para buraco macular com o uso de gás de curta duração (SF6) é segura e eficaz e que a manutenção de uma orientação pós-operatória de não-pronada também é segura. No entanto, essas recomendações devem ser avaliadas em um estudo prospectivo e randomizado para delinear de forma abrangente os riscos e benefícios associados.

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ABSTRACT Purpose We aimed to compare the outcomes of supine and prone miniaturized percutaneous nephrolithotomy (m-PNL) in the treatment of lower pole, middle pole and renal pelvic stones. Materials and Methods 54 patients who performed supine m-PNL between January 2017 and March 2018 and 498 patients who performed prone m-PNL between April 2015 and January 2018 were included in the study. Of the 498 patients, 108 matching 1: 2 in terms of age, gender, body mass index, American Association of Anesthesiology score, stone size, stone localization and hydronephrosis according to the supine m-PNL group were selected as prone m-PNL group. The patients with solitary kidney, upper pole stone, urinary system anomaly or skeletal malformation and pediatric patients (<18 years old) were excluded from the study. The success was defined as 'complete stone clearance' and was determined according to the 1st month computed tomography. Results The operation time and fluoroscopy time in supine m-PNL was significantly shorter than prone m-PNL group (58.1±45.9 vs. 80.1±40.0 min and 3.0±1.7 min vs. 4.9±4.5 min, p=0.025 and p=0.01, respectively). When post-operative complications were compared according to the modified Clavien-Dindo classification, overall and subgroup complication rates were comparable between groups. There was no significant difference between the groups in terms of the success rates (supine m-PNL; 72.2%, prone m-PNL; 71.3%, p=0.902). Conclusions Supine m-PNL procedure is more advantageous in terms of operation time and fluoroscopy time in the treatment of lower pole, middle pole and renal pelvic stones.

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PURPOSE: We aimed to compare the outcomes of supine and prone miniaturized percutaneous nephrolithotomy (m-PNL) in the treatment of lower pole, middle pole and renal pelvic stones. MATERIALS AND METHODS: 54 patients who performed supine m-PNL between January 2017 and March 2018 and 498 patients who performed prone m-PNL between April 2015 and January 2018 were included in the study. Of the 498 patients, 108 matching 1: 2 in terms of age, gender, body mass index, American Association of Anesthesiology score, stone size, stone localization and hydronephrosis according to the supine m-PNL group were selected as prone m-PNL group. The patients with solitary kidney, upper pole stone, urinary system anomaly or skeletal malformation and pediatric patients (<18 years old) were excluded from the study. The success was defined as 'complete stone clearance' and was determined according to the 1st month computed tomography. RESULTS: The operation time and fluoroscopy time in supine m-PNL was significantly shorter than prone m-PNL group (58.1±45.9 vs. 80.1±40.0 min and 3.0±1.7 min vs. 4.9±4.5 min, p=0.025 and p=0.01, respectively). When post-operative complications were compared according to the modified Clavien-Dindo classification, overall and subgroup complication rates were comparable between groups. There was no significant difference between the groups in terms of the success rates (supine m-PNL; 72.2%, prone m-PNL; 71.3%, p=0.902). CONCLUSIONS: Supine m-PNL procedure is more advantageous in terms of operation time and fluoroscopy time in the treatment of lower pole, middle pole and renal pelvic stones.

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ABSTRACT Purpose: To evaluate the impact of the patient position on the outcomes of PCNL among patients with complex renal stones. Material and Methods: From July 2011 to July 2014, we collected prospective data of consecutive patients who underwent PCNL. We included all patients with complex stones (Guy's Stone Score 3 or 4 (GSS) based on a CT scan) and divided them based on the position used during PCNL (prone or supine). The variables analyzed were gender, age, body mass index, ASA score, stone diameter, GSS, number of punctures, calyx puncture site, intercostal access and patient positioning. Complications were graded according to the modified-Clavien Classification. Success was considered if fragments ≤ 4mm were observed on the first postoperative day CT scan. Results: We analyzed 240 (46.4%) of 517 PCNL performed during the study period that were classified as GGS 3-4. Regarding patient positions, 21.2% were prone and 79.8% were supine. Both groups were comparable, although intercostal access was more common in prone cases (25.5% vs 10.5%; p=0.01). The success rates, complications, blood transfusions and surgical times were similar for both groups; however, there were significantly more visceral injuries (10.3% vs 2.6%; p=0.046) and sepsis (7.8% vs 2.1%; p=0.042) in prone cases. Conclusion: Supine or prone position were equally suitable for PCNL with complex stones and did not impact the success rates. However, supine position was associated with fewer sepsis cases and visceral injuries.

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PURPOSE: To evaluate the impact of the patient position on the outcomes of PCNL among patients with complex renal stones. MATERIAL AND METHODS: From July 2011 to July 2014, we collected prospective data of consecutive patients who underwent PCNL. We included all patients with complex stones (Guy's Stone Score 3 or 4 (GSS) based on a CT scan) and divided them based on the position used during PCNL (prone or supine). The variables analyzed were gender, age, body mass index, ASA score, stone diameter, GSS, number of punctures, calyx puncture site, intercostal access and patient positioning. Complications were graded according to the modified-Clavien Classification. Success was considered if fragments ≤ 4mm were observed on the first postoperative day CT scan. RESULTS: We analyzed 240 (46.4%) of 517 PCNL performed during the study period that were classified as GGS 3-4. Regarding patient positions, 21.2% were prone and 79.8% were supine. Both groups were comparable, although intercostal access was more common in prone cases (25.5% vs 10.5%; p=0.01). The success rates, complications, blood transfusions and surgical times were similar for both groups; however, there were significantly more visceral injuries (10.3% vs 2.6%; p=0.046) and sepsis (7.8% vs 2.1%; p=0.042) in prone cases. CONCLUSION: Supine or prone position were equally suitable for PCNL with complex stones and did not impact the success rates. However, supine position was associated with fewer sepsis cases and visceral injuries.

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Objetivo: Verificar a sensibilidade do frequencímetro Polar® RS800CX na variação postural a partir da frequência cardíaca (FC) e parâmetros da variabilidade da FC (VFC). Método: Homens jovens (n=20) saudáveis tiveram registradas as medidas de FC e dos intervalos R-R da VFC (RRi) nos domínios do tempo (RRi, RMSSD, pNN50) e da frequência (LF, HF e LF.HF-1) utilizando o Polar® RS800CX. Resultados: Diferenças (p<0,05) foram encontradas para Posição Supina (PS) 5' e PS10' vs. Posição Ortostática (PO) 5' e PO10' para FC (61,1±1,1 e 61,0±1,3 bpm vs. 79,5±3,9 e 80,8±3,5 bpm), RRi (990,0±19,9 e 994,5±23,2 ms vs. 787,4±34,0 e 768,6±30,1 ms), rMSSD (70,5±8,4 e 71,1±8,5 ms vs. 32,2±3,4 e 30,7±3,7 ms), pNN50 (41,1±6,0 e 46,3±5,3% vs. 15,4±2,5 e 14,3±2,6%), LF (52,3±6,4 e 55,4±6,5 n.u. vs. 82,0±4,2 e 80,7±4,8 n.u.), HF (47,7±6,4 e 44,6±6,5 n.u. vs. 18,0±4,2 e 19,3±4,8 n.u.) e LF.HF-1 (2,9±0,8 e 3,1±0,8 vs. 14,1±2,9 e 14,3±3,1). Conclusão: O frequencímetro Polar® RS800CX se apresentou sensível a variações na postura corporal.

Purpose: To determine the sensitivity of the frequency meter Polar® RS800CX in postural maneuver from the heart rate (HR) and HR variability (HRV) parameters. Method: Young (n=20) healthy men had registered HR and RR intervals (RRi) measurements in the time domain (RRi, RMSSD, pNN50) and frequency (LF, HF and LF.HF-1) using the Polar® RS800CX. Results: Differences were found to supine position (SUP) 5 'and SUP10' vs. standing position (STP) 5 'and STP10' in HR (61.1 ± 1.1 and 61.0 ± 1.3 bpm vs. 79.5 ± 3.9 and 80.8 ± 3.5 bpm), RRi (990.0 ± 19.9 and 994.5 ± 23,2 ms vs. 787.4 ± 34.0 ms and 768.6 ± 30.1 ms), rMSSD (70.5 ± 8.4 and 71.1 ± 8.5 ms vs. 32.2 ± 3.4 and 30.7 ± 3.7 ms), pNN50 (41.1 ± 6 0 and 46.3 ± 5.3% vs. 15.4 ± 2.5 and 14.3 ± 2.6%), LF (52.3 ± 6.4 and 55.4 ± 6.5 n.u. vs. 82.0 ± 4.2 and 80.7 ± 4.8 n.u), HF (47.7 ± 6.4 and 44.6 ± 6.5 n.u. vs. 18.0 ± 4.2 and 19.3 ± 4.8 n.u.) and LF.HF-1 (2.9 ± 0.8 and 3.1 ± 0.8 vs. 14.1 ± 2.9 and 14.3 ± 3.1). Conclusion: The frequency meter RS800CX Polar® appeared sensitive to variations in body posture.

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Resumo Este estudo teve por objetivo conhecer a opinião das mães e identificar os fatores associados à intenção de colocar o bebê para dormir em decúbito dorsal em Rio Grande, RS. Foi aplicado questionário padronizado a todas as mães que tiveram filho nas duas únicas maternidades, entre 01/01 a 31/12/2010, e que residiam neste município. Utilizou-se teste do qui-quadrado para comparar proporções e regressão de Poisson, com ajuste robusto da variância na análise multivariável. A medida de efeito utilizada foi razão de prevalências (RP). Dentre as 2.395 (97,2% do total) mães entrevistadas, 20,5% (IC95%: 18,4%-21,6%) manifestaram intenção de colocar o bebê para dormir de barriga para cima. Esta intenção variou de 11% (IC95%: 8,1-13,7), entre mães com três ou mais filhos, a 35% (IC95% 31,1-40,2), entre aquelas com 12 anos ou mais de escolaridade. Após analise ajustada, mães de menor idade, de maior escolaridade e renda familiar, que realizaram pré-natal na rede privada, ou que tiveram três ou mais filhos, apresentaram RP significativamente maior para colocar o bebê para dormir de barriga para cima, em relação às demais. Campanhas de incentivo a esta prática devem priorizar mães de pior nível socioeconômico, de maior idade e que realizam pré-natal em unidades básicas de saúde.

Abstract This study aimed to identify mother's opinion on infant sleep position and the factors associated with the intention to place the infant in the supine position in the municipality of Rio Grande, Southern Brazil. A standardized questionnaire was applied to all mothers residing in this municipality who gave birth to a child in the only two local maternity wards from January 1 to December 31, 2010. Chi-square test was used to compare proportions, along with a Poisson regression with robust adjustment in the multivariate analysis. The effect measure used was prevalence ratio (PR). Of the 2,395 mothers interviewed (972% of the total), 20.5% (95%CI: 18.4%-21.6%) intended to place the newborn to sleep in the supine position. This prevalence varied from 11% (95%CI: 8.1-13.7) for mothers with three or more children to 35% (CI95%: 31.1-40.2) among those with 12 or more years of schooling. After adjusted analysis, younger mothers with higher education and household income who performed prenatal care in the private system or who have had three or more children had significantly higher PR to place the baby to sleep in the supine position compared to others. Campaigns encouraging this practice should focus primarily on older mothers of lower socioeconomic level and performing prenatal care in PHC facilities.

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Introducción: El síndrome de apnea e hipopnea obstructiva del sueño (SAHOS) es un problema de salud pública común, en donde la posición al dormir tiene influencias fisiológicas importantes en el patrón de sueño. Objetivo: Establecer la severidad según índice de apnea hipopnea del sueño en los pacientes con síndrome obstructivo del sueño posicional (supino) y no posicional (no supino) en el Hospital Universitario Clínica San Rafael entre el 1 de enero de 2014 al 31 de diciembre de 2017. Diseño: Estudio observacional descriptivo de corte transversal. Metodología: Se tomaron datos registrados en las historias clínicas de los pacientes que asistieron al Hospital Universitario Clínica San Rafael. El tamaño de la muestra fue de 88 personas de ambos sexos, en edades entre 18 y 90 años. Resultados: La distribución por género fue de 55 hombres (62,5%) y 33 mujeres (37,5%) de los cuales 47(53.4%) fueron SAHOS posicional y 41(46.6%) SAHOS no posicional. El peso promedio de las mujeres es de 71 kg y en hombres de 81 kg, la estatura es 1,58 cm y 1.67 respectivamente presentándose índices de masa corporal altos, en promedio de 28 para los dos géneros. La edad promedio es de 53 años para mujeres y de 46 años para hombres. Se encontró una asociación estadísticamente significativa entre la severidad y SAHOS posicional (Fischer exact p=0.018), en donde el SAHOS severo está asociado con apnea no posicional, mientras que el SAHOS leve tiende a corresponder a la apnea posicional. Conclusiones: En nuestro estudio se evidenció que el SAHOS más severo está asociado a la apnea no posicional, mientras que el SAHOS menos severo tiende a corresponder a la apnea posicional.

Introduction: Obstructive sleep apnea and hypopnea syndrome (OSAHS) is a common public health problem, where the sleeping position has important physiological influences on the sleep pattern. Objective: To establish the severity according to the index of hypopnea sleep apnea in patients with positional (supine) and non-positional (non-supine) sleep obstructive syndrome in the San Rafael Clinical University Hospital from January 1, 2014 to December 31, 2017. Design: Cross-sectional study. Methods: Recorded data of patients that attend the outpatient service of the San Rafael Clinical University Hospital has been taken for the study. The simple size was 88 people of both sexes, with ages between 18 and 90 years. Results: The distribution by gender was 55 men (62.5%) and 33 women (37.5%) of which 47(53.4%) were positional OSAS and 41(46.6%) non-positional OSAS The average weight of women is 71 kg and in men of 81 kg, the height is 1.58 cm and 1.67 cm respectively, with high body mass indexes, on average 28 for both genders. The average age is 53 for women and 46 for men. A statistically significant association was found between severity and positional OSAS (Fischer exact p = 0.018), where severe OSAS is associated with non-positional apnea, while mild OSAS corresponds to positional apnea. Conclusions: In our study it was evidenced that the most severe OSAS is associated to the non-positional apnea, while the less severe OSAS tends to correspond to the positional apnea.

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PURPOSE: Negative expiratory pressure (NEP) is a simple technique for the evaluation of upper airway collapsibility in patients with obstructive sleep apnea (OSA). Most studies evaluated NEP using a mouthpiece that may exclude the cephalic portion of the upper airway. We hypothesize that NEP determination is influenced by interface and position. METHODS: We evaluated patients with suspected OSA using polysomnography, NEP (-5 cmH2O in sitting and supine position with mouthpiece and nasal mask). A subgroup also underwent computed tomography (CT) of the upper airway. RESULTS: We studied a total of 86 subjects (72 male, age 46 ± 12 yrs, body mass index 30.0 ± 4.4 kg/m2, neck circumference 40.0 ± 3.5 cm, AHI 32.9 ± 26.4, range 0.5 to 122.5 events/hour). NEP was influenced by interface and position (p = 0.007), and upper airway was more collapsible with mouthpiece than with nasal mask in sitting position (p = 0.001). Position influenced NEP and was worse in supine only when evaluated by nasal mask. Expiratory resistance (R 0.2) at 0.2 s during NEP was significantly higher and independent of position with mouthpiece than with nasal mask (20.7 versus 8.6 cmH2O/L s-1, respectively, p = 0.018). NEP evaluated with nasal mask in supine position and with mouthpiece in sitting position, but not when evaluated with mouthpiece in supine position, were correlated with upper airway anatomical measurements including tongue dimensions and pharyngeal length. CONCLUSIONS: Interface and position influence NEP. NEP evaluated with nasal mask in supine position may convey more relevant information for patients under investigation for OSA than when evaluated with mouthpiece.

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INTRODUCTION AND HYPOTHESIS: To compare complications and outcomes of complete supine percutaneous nephrolithotomy (csPCNL) with ultrasound guided and fluoroscopically guided procedure. MATERIALS AND METHODS: In this randomized clinical trial study from January 2009 to September 2010, 26 of 51 patients with renal stones underwent csPCNL with ultrasonographic guidance in all steps of the procedure (group A), and the other 25 patients underwent standard fluoroscopically guided csPCNL (group B). All of the patients underwent PCNL in the complete supine position. Statistical analysis was performed with SPSS16 software. RESULTS: Mean BMI was 28.14 in group A and 26.31 in group B (p=0.30). The mean stone burden was 26.48 and 30.44 in groups A and B, respectively (p=0.20). The stone free rate was 88.5% in group A and 75.5% in group B, that was no significant (p=0.16). Overall 2 patients (7.7%) in group A and 6 patients (24%) in group B had complications (p=0.11). Mean operative time in group A was 88.46 minutes, and in group B it was 79.58 minutes (p=0.39). Mean hospital stay was 69.70 and 61.79 hours in group A and B, respectively (p=0.22). There was no visceral injury in groups. CONCLUSIONS: This randomized study showed that totally ultrasonic had the same outcomes of fluoroscopically csPCNL. Ultrasonography can be an alternative rather than fluoroscopy in PCNL. We believe that more randomized studies are needed to allow endourologists to use sonography rather than fluoroscopy in order to avoid exposition to radiation.

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ABSTRACT Introduction and Hypothesis: To compare complications and outcomes of complete supine percutaneous nephrolithotomy (csPCNL) with ultrasound guided and fluoroscopically guided procedure. Materials and Methods: In this randomized clinical trial study from January 2009 to September 2010, 26 of 51 patients with renal stones underwent csPCNL with ultrasonographic guidance in all steps of the procedure (group A), and the other 25 patients underwent standard fluoroscopically guided csPCNL (group B). All of the patients underwent PCNL in the complete supine position. Statistical analysis was performed with SPSS16 software. Results: Mean BMI was 28.14 in group A and 26.31 in group B (p=0.30). The mean stone burden was 26.48 and 30.44 in groups A and B, respectively (p=0.20). The stone free rate was 88.5% in group A and 75.5% in group B, that was no significant (p=0.16). Overall 2 patients (7.7%) in group A and 6 patients (24%) in group B had complications (p=0.11). Mean operative time in group A was 88.46 minutes, and in group B it was 79.58 minutes (p=0.39). Mean hospital stay was 69.70 and 61.79 hours in group A and B, respectively (p=0.22). There was no visceral injury in groups. Conclusions: This randomized study showed that totally ultrasonic had the same outcomes of fluoroscopically csPCNL. Ultrasonography can be an alternative rather than fluoroscopy in PCNL. We believe that more randomized studies are needed to allow endourologists to use sonography rather than fluoroscopy in order to avoid exposition to radiation.

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Objetivo:Analisar a influência da posição corporal no deslocamento da pronga nasal em recém-nascidos pré-termos.Métodos:Estudo prospectivo, randomizado e tipo crossover. Foram estudados recém-nascidos com média de idade gestacional de 29,7±2 semanas, peso de nascimento de 1.353±280 g, 2,9±2,2 dias de vida e em uso da pressão positiva contínua de vias aéreas. Avaliou-se o número de vezes em que o dispositivo nasal sofreu deslocamento, além de variáveis cardiorrespiratórias, como frequência respiratória, cardíaca e saturação de oxigênio, conforme a criança foi alocada nas posições corporais prona, lateral direita, lateral esquerda e supina, segundo ordem aleatória previamente estabelecida. As informações em cada posição foram coletadas a cada 10 minutos, por 60 minutos. Foi considerada ocorrência quando o dispositivo nasal se deslocou do orifício das narinas, após o período de três minutos na posição desejada, e houve necessidade de intervenção do examinador.Resultados:Nas 16 crianças estudadas, o deslocamento do dispositivo nasal ocorreu nas posições prona (nove crianças - 56,2%) e lateral esquerda (duas crianças - 12,5%). A pronga se deslocou 11 vezes na posição prona, sete delas nos primeiros dez minutos, e duas vezes na posição lateral esquerda, uma nos primeiros dez minutos. Não se detectaram alterações clinicamente significativas nas variáveis cardiorrespiratórias.Conclusões:A posição prona mostrou maior dificuldade para se manter o dispositivo nasal de suporte pressórico não invasivo na forma adequada.

Objective:To evaluate the influence of body position on the displacement of nasal prongs in preterm infants.Methods:This prospective, randomized, crossover study enrolled infants born at a mean gestational age of 29.7±2 weeks, birth weight of 1353±280g and 2.9±2.2 days of life, submitted to continuous positive airway pressure by nasal prongs. The main outcome was the number of times that the nasal prongs were displaced following infant positioning in the following body positions: prone, right lateral, left lateral, and supine, according to a pre-established random order. Moreover, cardiorespiratory variables (respiratory rate, heart rate, and oxygen saturation) were evaluated for each body position. Data for each position were collected every 10 min, over a period of 60 min. An occurrence was defined when the nasal prongs were displaced from the nostrils after 3 min in the desired position, requiring intervention of the examiner.Results:Among the 16 studied infants, the occurrence of nasal prong displacement was only observed in the prone position (9 infants - 56.2%) and in the left lateral position (2 infants - 12.5%). The number of times that the prongs were displaced was 11 in the prone position (7 within the first 10min) and 2 in the left lateral position (1 within the first 10min). No clinically significant changes were observed in the cardiorespiratory variables.Conclusions:Maintenance of the nasal prongs to provide adequate noninvasive respiratory support was harder in the prone position.

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OBJECTIVE: To evaluate the influence of body position on the displacement of nasal prongs in preterm infants. METHODS: This prospective, randomized, crossover study enrolled infants born at a mean gestational age of 29.7±2 weeks, birth weight of 1.353±280g and 2.9±2.2 days of life, submitted to continuous positive airway pressure by nasal prongs. The main outcome was the number of times that the nasal prongs were displaced following infant positioning in the following body positions: prone, right lateral, left lateral, and supine, according to a pre-established random order. Moreover, cardiorespiratory variables (respiratory rate, heart rate, and oxygen saturation) were evaluated for each body position. Data for each position were collected every 10 minutes, over a period of 60minutes. An occurrence was defined when the nasal prongs were displaced from the nostrils after 3 minutes in the desired position, requiring intervention of the examiner. RESULTS: Among the 16 studied infants, the occurrence of nasal prong displacement was only observed in the prone position (9 infants-56.2%) and in the left lateral position (2 infants-12.5%). The number of times that the prongs were displaced was 11 in the prone position (seven within the first 10minutes) and two in the left lateral position (one within the first 10minutes). No clinically significant changes were observed in the cardiorespiratory variables. CONCLUSIONS: Maintenance of the nasal prongs to provide adequate noninvasive respiratory support was harder in the prone position.

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Background: Early mobilization in intensive care units (ICU) provides respiratory, neurological and cardiovascular benefits in hospitalized patients. However, the orthostatic effects of changing from a supine to a sitting position may interfere with cerebral hemodynamics of patients with aneurysmal subarachnoid hemorrhage (aSAH). Aim: To describe the changes in mean cerebral blood flow velocity (MCBFV) in supine and sitting position, in adult patients with aSAH, with asymptomatic vasospasm (AVS) or without vasospasm (VS) at a neurosurgical ICU. Material and Methods: Descriptive case series study in 21 patients with aSAH, both with and without VS. They were positioned in a supine 30° position and then seated at the edge of bed for six minutes. MCBFV was measured by transcranial Doppler (TCD), and hemodynamic variables in both positions were registered. After this basal assessment and for 21 days after the episode of SAH, patients were seated once a day and signs of VS were recorded. Results: No significant changes in MCBFV or hemodynamic variables were detected during position changes, except for an increase in heart rate in the sitting position. No patient with AVS at the onset, had symptomatic VS during the 21 days of follow up when patients were seated. Among patients with a normal MCBFV at baseline, five patients (24%) had VS at a mean of three days after the first time that they were seated on the edge of bed. Conclusions: Sitting patients at the edge of the bed is a safe mobilization alternative for patients who suffered aSAH who did not have VS or had AVS.

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