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ABSTRACT Objective & Introduction: To show the feasibility of a combined transperitoneal (TP) and retroperitoneal (RP) laparoscopic approach in a Von Hipple-Lindau (VHL) patient with multiple kidney tumors. VHL is an autosomal dominant inherited syndrome characterized by a high incidence of benign and malignant tumors and cysts in many organs. Renal cell carcinoma is one of the most common and a leading cause of mortality (1). Surgical approach is usually complex because of its multiplicity and the need of maximum kidney function preservation due to the risk of future recurrences (2, 3). Intracorporeal renal hypothermia may be useful in these cases to prevent permanent renal function loss (4). Materials and Methods: A 40 years old male was being monitored for multiple bilateral renal masses. Family history included a VHL syndrome affecting his mother and sister. Past medical history included a VHL syndrome with multiple cerebellar and medular hemangioblastomas, a pancreatic cystoadenoma and bilateral kidney tumors which had significantly grown up during follow-up. The patient was scheduled for laparoscopic multiple partial nephrectomy. A combined TP and RP approach with intracorporeal hypothermia was chosen. Results: A total of six right kidney tumors were removed. Operative time was 240 min. Cold ischemia time was 50 min. Average kidney temperature was 23.7°C. Blood losses were negligible. The patient was discharged after 72 hours. No major changes in serum creatinine were found during the follow-up. Final pathology revealed a clear cell renal cell carcinoma, pT1a, ISUP grade 2 in most of the tumors but one ISUP grade 3. Surgical margins were negative. Conclusions: Combined TP and RP is a feasible alternative for the treatment of multiple renal tumors. It's safe and effective, allowing the use of intracorporeal hypothermia which may improve postoperative renal function. Consistent experience is needed before embarking on this surgery.

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PURPOSE: To evaluate the effects of hyperbaric oxygenation on prevention of adhesions in the abdominal cavity after laparotomy. METHODS: Fifty four rats underwent laparotomy; stitches were made in the four quadrant parietal peritoneum and abdominal cavity closure. Animals were divided into three groups: 1 - control; 2 - subjected to high pressures and oxygenation; 3 - subjected to 100% hyperbaric oxygenation. The animals in groups 2 and 3 were daily submitted to oxygenation hyperbaric chamber after surgery. On the seventh day another laparotomy, registration of procedure, assessment of adhesions and biopsies of the peritoneum were held. Professionals analyzed the videos and the biopsies. RESULTS: Peritoneal cavity adhesions occurred in animals of three groups with no difference between them. In Group 3, the adhesions presented more fragile and vascular proliferation more pronounced, and there was no difference in comparison with the first and second groups. However, there was no significant difference in the evaluation of these parameters between the animals in groups 1 and 2. CONCLUSIONS: Postoperative hyperbaric oxygenation in rats submitted to laparotomy did not alter the frequency, but reduced the density of adhesions in the peritoneal cavity and promoted vascular proliferation. The change in atmospheric pressure alone had no influence on the results.

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Abstract Purpose: To evaluate the effects of hyperbaric oxygenation on prevention of adhesions in the abdominal cavity after laparotomy. Methods: Fifty four rats underwent laparotomy; stitches were made in the four quadrant parietal peritoneum and abdominal cavity closure. Animals were divided into three groups: 1 - control; 2 - subjected to high pressures and oxygenation; 3 - subjected to 100% hyperbaric oxygenation. The animals in groups 2 and 3 were daily submitted to oxygenation hyperbaric chamber after surgery. On the seventh day another laparotomy, registration of procedure, assessment of adhesions and biopsies of the peritoneum were held. Professionals analyzed the videos and the biopsies. Results: Peritoneal cavity adhesions occurred in animals of three groups with no difference between them. In Group 3, the adhesions presented more fragile and vascular proliferation more pronounced, and there was no difference in comparison with the first and second groups. However, there was no significant difference in the evaluation of these parameters between the animals in groups 1 and 2. Conclusions: Postoperative hyperbaric oxygenation in rats submitted to laparotomy did not alter the frequency, but reduced the density of adhesions in the peritoneal cavity and promoted vascular proliferation. The change in atmospheric pressure alone had no influence on the results.

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Resumen Introducción: La resección quirúrgica ha demostrado ser la única opción curativa para el cáncer gástrico, al incluir linfadenectomía D2 como estándar de seguridad. Sin embargo, el beneficio de extender la resección a la bursa omentalis sigue siendo controvertido. La investigación publicada no ha arrojado evidencia categórica definiendo la eficacia. Realizamos una revisión sistemática de ensayos clínicos aleatorizados publicados (ECA), para evaluar el beneficio de la bursectomía en la sobrevida global (OS) y la sobrevida libre de enfermedad (SLE) de los pacientes. Como resultado secundario se consideró la seguridad del procedimiento. Métodos: Se realizó una búsqueda bibliográfica en las bases de datos de Pubmed, Cochrane, Scielo, Metabuscador PUC, Epistemonikos, Tripdatabase, Sciencedirect y Lilacs para ECA que compararan la bursectomía con la no bursectomía, publicados antes de marzo de 2016. Se establecieron y aplicaron criterios de inclusión y exclusión. Resultados: Se encontraron 3 ECA correspondientes a diferentes informes de la misma cohorte de pacientes. Se incluyeron 210 pacientes (104 en el grupo de bursectomía y 106 en el grupo de no bursectomía). La bursectomía no tuvo un efecto significativo ni en la OS a 5 años (HR: 1,4; IC del 95%: 0,87-2,25) ni en la SLE (HR: 1,25; IC del 95% 0,80-1,97). No se observó diferencia estadísticamente significativa en la tasa de complicaciones al comparar el grupo de bursectomía y el grupo de no bursectomía. Conclusión: La gastrectomía con bursectomía no es superior a la no bursectomía, ya sea en términos de OS a 5 años o de SLE.

Abstract Introduction: The surgical resection has proved to be the only curative option for Gastric Cancer, when including D2 linfadenectomy as security standard. The benefit of extending the resection to the bursa omentalis, however, is still controversial. The published research has not yielded categorical evidence on defining the efficacy of bursectomy. We conducted a systematic review of published randomized controlled trials (RCT), to evaluate the benefit of bursectomy in the overall survival (OS) and disease-free survival (DFS) of patients. As secondary outcome, was considered the safety of the procedure. Methods: A literature search was conducted in Pubmed, Cochrane library databases, Scielo, Metabuscador PUC, Epistemonikos, Tripdatabase, Sciencedirect, and Lilacs for randomized clinical trials comparing bursectomy with non-bursectomy, published before March 2016. Inclusion and exclusion criteria were established and applied. Results: We found three RCT corresponding to different reports of the same cohort of randomized patients. They included 210 patients (104 in the bursectomy group, and 106 in the non-bursectomy group). The bursectomy did not have a significant effect either on 5-years OS (HR: 1.4; 95%CI: 0,87-2,25), or on DFS (HR: 1.25; 95% CI: 0,80-1,97). No statistically significant difference was observed in the rate of complications, when comparing the bursectomy group and the non-bursectomy group. Conclusion: Gastrectomy with bursectomy is not superior to non-bursectomy either in terms of 5 years OS or on DFS.

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INTRODUCTION: Recently, placement of a ventriculoperitoneal shunt via a transumbilical approach has been reported. PATIENTS AND METHODS: Herein, we report the repair of an umbilical hernia via the same incision and introduction of the distal end of a ventricultoperitoneal shunt into the peritoneal cavity in 3 patients. A case illustration is included. RESULTS: Both hernia repair and placement of the distal end of the ventriculoperitoneal shunt were uncomplicated in our small case series. CONCLUSIONS: To our knowledge, simultaneous repair of an umbilical hernia followed by transumbilical shunt placement has not been reported. As umbilical hernias are so common in infants, this finding, based on our experience, should not exclude placement of peritoneal tubing in the same setting.

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The aim of this study was to explore the clinical efficacy of a novel retrograde puncture approach to establish a preperitoneal space for laparoscopic direct inguinal hernia repair with inguinal ring suturing. Forty-two patients who underwent laparoscopic inguinal hernia repair with retrograde puncture for preperitoneal space establishment as well as inguinal ring suturing between August 2013 and March 2014 at our hospital were enrolled. Preperitoneal space was successfully established in all patients, with a mean establishment time of 6 min. Laparoscopic repairs were successful in all patients, with a mean surgical time of 26±15.1 min. Mean postoperative hospitalization duration was 3.0±0.7 days. Two patients suffered from postoperative local hematomas, which were relieved after puncturing and drainage. Four patients had short-term local pain. There were no cases of chronic pain. Patients were followed up for 6 months to 1 year, and no recurrence was observed. Our results demonstrate that preperitoneal space established by the retrograde puncture technique can be successfully used in adult laparoscopic hernioplasty to avoid intraoperative mesh fixation, and thus reduce medical costs.

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The aim of this study was to explore the clinical efficacy of a novel retrograde puncture approach to establish a preperitoneal space for laparoscopic direct inguinal hernia repair with inguinal ring suturing. Forty-two patients who underwent laparoscopic inguinal hernia repair with retrograde puncture for preperitoneal space establishment as well as inguinal ring suturing between August 2013 and March 2014 at our hospital were enrolled. Preperitoneal space was successfully established in all patients, with a mean establishment time of 6 min. Laparoscopic repairs were successful in all patients, with a mean surgical time of 26±15.1 min. Mean postoperative hospitalization duration was 3.0±0.7 days. Two patients suffered from postoperative local hematomas, which were relieved after puncturing and drainage. Four patients had short-term local pain. There were no cases of chronic pain. Patients were followed up for 6 months to 1 year, and no recurrence was observed. Our results demonstrate that preperitoneal space established by the retrograde puncture technique can be successfully used in adult laparoscopic hernioplasty to avoid intraoperative mesh fixation, and thus reduce medical costs.

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PURPOSE: To assess the systemic response of pigs to the intraperitoneal implantation of polypropylene mesh associated with chitosan-based film with a degree of deacetylation of 95%. METHODS: Blood samples were collected 24 hours before, and two and seven days after surgery. Systemic reactions were evaluated based on white blood cell count, C-reactive protein, and total serum protein, albumin and globulin levels. RESULTS: The systemic response was proportional to the composite response induced by polypropylene mesh, and the tissue inflammatory response was higher in the PP group (p=0.0033). CONCLUSION: The polypropylene mesh/chitosan-based film composite did not elicit a systemic response in pigs.

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PURPOSE: To evaluate a new, low-cost, reusable balloon trocar device for dissection of the preperitoneal space during endoscopic surgery. METHODS: Twenty swine (weight: 15-37 kg) were randomized to two groups, according to whether the preperitoneal space was created with a new balloon device manufactured by Bhio-Supply (group B) or with the commercially available OMSPDB 1000® balloon device manufactured by Covidien (group C). Quality and size of the created preperitoneal space, identification of anatomic structures, balloon dissection time, total procedure time, balloon resistance and internal pressure after insufflation with 300 mL of ambient air, balloon-related complications, and procedure cost were assessed. RESULTS: No significant differences in dissection time, total procedure time, or size of the created preperitoneal space were found between the groups. Balloons in group B had a significantly higher internal pressure compared to balloons in group C. None of the balloons ruptured during the experiment. Three animals in group C had balloon-related peritoneal lacerations. Despite a higher individual device cost, group B had a lower procedure cost over the entire experiment. CONCLUSION: The new balloon device is not inferior to the commercially available device in terms of the safety and effectiveness for creating a preperitoneal space in swine.

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