Impact of pneumoperitoneum on intra-abdominal microcirculation blood flow: an experimental randomized controlled study of two insufflator models during transanal total mesorectal excision : An experimental randomized multi-arm trial with parallel treatment design.

OBJECTIVE: To compare changes in microcirculation blood flow (MCBF) between pulsatile and continuous flow insufflation. Transanal total mesorectal excision (TaTME) was developed to improve the quality of the resection in rectal cancer surgery. The AirSeal IFS® insufflator facilitates the pelvic dissection, although evidence on the effects that continuous flow insufflation has on MCBF is scarce. METHODS: Thirty-two pigs were randomly assigned to undergo a two-team TaTME procedure with continuous (n = 16) or pulsatile insufflation (n = 16). Each group was stratified according to two different pressure levels in both the abdominal and the transanal fields, 10 mmHg or 14 mmHg. A generalized estimating equations (GEE) model was used. RESULTS: At an intra-abdominal pressure (IAP) of 10 mmHg, continuous insufflation was associated with a significantly lower MCBF reduction in colon mucosa [13% (IQR 11;14) vs. 21% (IQR 17;24) at 60 min], colon serosa [14% (IQR 9.2;18) vs. 25% (IQR 22;30) at 60 min], jejunal mucosa [13% (IQR 11;14) vs. 20% (IQR 20;22) at 60 min], renal cortex [18% (IQR 15;20) vs. 26% (IQR 26;29) at 60 min], and renal medulla [15% (IQR 11;20) vs. 20% (IQR 19;21) at 90 min]. At an IAP of 14 mmHg, MCBF in colon mucosa decreased 23% (IQR 14;27) in the continuous group and 28% (IQR 26;31) in the pulsatile group (p = 0.034). CONCLUSION: TaTME using continuous flow insufflation was associated with a lower MCBF reduction in colon mucosa and serosa, jejunal mucosa, renal cortex, and renal medulla compared to pulsatile insufflation.

Safety of extraperitoneal rectal resection and ileo- or colorectal anastomosis without loop ileostomy in patients with peritoneal metastases treated with CRS and HIPEC.

AIM: Extraperitoneal rectal resection combined with complete peritonectomy of the pelvis in patients with peritoneal metastases is associated with a high rate of morbidity and mortality due to anastomotic leakage (AL). Therefore, many centers tend to perform loop ileostomy to reduce the clinical impact of AL. The aim of this study was to analyze the need for protective stoma creation in this patient group to avoid major complications and mortality in the case of AL. METHOD: We analyzed 53 patients who underwent extraperitoneal rectal resection from 409 consecutive patients treated with cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (HIPEC) at our department between January 1997 and December 2016. RESULTS: Mean age of the patients was 56.7 (SD 12.2) years and the mean Peritoneal Cancer Index was 24.6 (SD 12.0). Complete cytoreduction was achieved in 33 patients (62.3%). Six patients received an ileostomy or a colostomy, 5 of 6 with permanent intention. One patient (2.1%) developed AL postoperatively. Overall, 21 patients (39.6%) developed surgical complications, while 41 (77.3%) developed medical complications. The mortality rate was 7.5% (n = 4). In total, 26 patients (49.1%) developed Clavien-Dindo class-III/IV complications. CONCLUSIONS: These results demonstrate the safety of colorectal anastomosis in combination with HIPEC in the absence of loop ileostomy. Loop ileostomy may be omitted for patients with low risk for AL in experienced centers with adequate post-operative care, possibilities for post-operative assessment and radiological intervention to avoid stoma related complications and increase the quality of life of patients with peritoneal metastases. This article is protected by copyright. All rights reserved.

Transanal total mesorectal excision: pathological results of 186 patients with mid and low rectal cancer.

BACKGROUND: Transanal total mesorectal excision (TaTME) seems to be a valid alternative to the open or laparoscopic TME. Quality of the TME specimen is the most important prognostic factor in rectal cancer. This study shows the pathological results of the largest single-institution series published on TaTME in patients with mid and low rectal cancer. METHODS: We conducted a retrospective cohort study of all consecutive patients with rectal cancer, treated by TaTME between November 2011 and June 2016. Patient data were prospectively included in a standardized database. Patients with all TNM stages of mid (5-10 cm from the anal verge) and low (0-5 cm from the anal verge) rectal cancer were included. RESULTS: A total of 186 patients were included. Tumor was in the mid and low rectum in, respectively, 62.9 and 37.1%. Neoadjuvant chemoradiotherapy was given in 62.4%, only radiotherapy in 3.2%, and only chemotherapy in 2.2%. Preoperative staging showed T1 in 3.2%, T2 in 20.4%, T3 in 67.7%, and T4 in 7.5%. Mesorectal resection quality was complete in 95.7% (n = 178), almost complete in 1.6% (n = 3), and incomplete in 1.1% (n = 2). Overall positive CRM (≤ 1 mm) and DRM (≤ 1 mm) were 8.1% (n = 15) and 3.2% (n = 6), respectively. The composite of complete mesorectal excision, negative CRM, and negative DRM was achieved in 88.1% (n = 155) of the patients. The median number of lymph nodes found per specimen was 14.0 (IQR 11-18). CONCLUSIONS: The present study showed good rates regarding total mesorectal excision, negative circumferential, and distal resection margins. As the specimen quality is a surrogate marker for survival, TaTME can be regarded as a safe method to treat patients with rectal cancer, from an oncological point of view.

Transanal Hartmann's colostomy reversal assisted by laparoscopy: outcomes of the first 10 patients.

INTRODUCTION: Restoration of intestinal continuity after Hartmann's procedure is a technically difficult surgery associated with significant morbidity and mortality. This study presents the short-term results of a new approach: a transanal Hartmann's colostomy reversal assisted by laparoscopy. METHOD: This is a retrospective analysis of data collected in one tertiary hospital, from October 2013 to November 2015. RESULTS: During the study period, there were ten cases of transanal Hartmann's reversal. Reasons for Hartmann's procedure were: complicated diverticulitis (4), anastomotic leak (3), and recto-sigmoid cancer (3). Rectal stump length was 10.4 ± 4.5 cm. Reconstruction was achieved in all patients. One low colorectal anastomosis was hand-sewn, the other 9 were stapled. Mean operative time was 204 ± 65 min. Diverting loop ileostomies were created in five patients and all were closed during the following year. One case required hand-assistance but there was no conversion to open surgery. Iatrogenic laparoscopic enterotomies occurred in four patients and all were repaired primarily without consequences. Three patients had a total of four post-operative complications: ileus (2), abdominal abscess and wound infection (1). None required reoperation. Mean length of stay was 7.2 ± 4.3 days. One required readmission. CONCLUSION: A transanal Hartmann's reversal assisted by laparoscopy is a new approach for a difficult surgery. It has the potential to be an additional tool in the case of hostile pelvises or with a rectal stump difficult to identify. The surgery remains challenging and indications need to be clarified.

Salud bucal y xilitol: usos y posibilidades en caries y enfermedad periodontal en poblaciones "PEPE" / Xylitol and oral health: uses and possibilities in caries and periodontal disease in populations "PEPE"

La caries dental y la enfermedad periodontal constituyen un problema constante que demanda muchos recursos pero que sigue atacando día a día a la población, razón por la cual se deben explorar nuevas posibilidades de prevención y tratamiento complementarias a las ya existentes. El xilitol es un alcohol de 5 carbonos derivado de la D-xilosa cuyo mecanismo de acción es inhibir el crecimiento bacteriano, principalmente de Streptococcus mutans en la saliva y la biopelícula además de mejorar el flujo salivar y otros efectos como evitar la inflamación gingival, disminuir el efecto adherente de microorganismos (proporcionando una protección contra enfermedades del periodonto) e impedir la desmineralización del esmalte, ya que reduce la producción de ácido. Esta investigación viabiliza el uso del xilitol en la salud bucal y tiene como propósito impulsar nuevos proyectos de aplicación en el campo de prevención y tratamiento de alteraciones bucales para proponer usos reales e innovadores en algunas poblaciones que hemos titulado como poblaciones "PEPE" (Poblaciones Especiales Para el Periodonto): niños discapacitados, soldados en campaña, mujeres en gestación, indígenas, pueblo ROM (romaníes), pacientes con xerostomía (bien sea por patologías reumatoides o por quimioterapia), entre otras. Se propone el uso del xilitol, para el mejoramiento de su salud bucal promoviendo el uso de la goma de mascar como vehículo.

Dental caries and periodontal disease are a constant problem that demands a lot of resources but which is still attacking the population every day. Therefore new possibilities for prevention and treatment complementary should be explored to the existing ones. Xylitol is a 5-carbon alcohol derived from the D-xylose whose mechanism of action is to inhibit the growth of bacteria, mainly Streptococcus mutans found in saliva and biofilm. Besides, it also improves the flow of saliva, prevents the gingival inflammation, reduces adherence of the microorganism (providing protection against periodontal disease) and prevents enamel demineralization reducing acid production. This research makes viable the use of xylitol on oral health and aims to promote new application projects in the field of prevention and treatment of oral alterations. This research also proposes innovative uses in some kind of populations called "PEPE" ("Poblaciones Especiales para el Periodonto" or periodontium special populations) such as disabled children, soldiers in the field, pregnant women, indigenous people, ROM people (Gypsies), patients with xerostomia (either for rheumatoid diseases or chemotherapy), among others. It is proposed that the use of xylitol improves oral health by promoting the use of chewing gum as a vehicle.

Tumor pseudopapilar del páncreas: reporte de caso / Pancreatic pseudopapilar tumor: case report

El tumor pseudopapilar del páncreas es una entidad muy poco frecuente que afecta preferentemente a mujeres jóvenes. Se trata de un carcinoma quístico con bajo potencial maligno que se diagnostica generalmente de forma incidental pues no hay signos ni síntomas patognomónicos de dicha enfermedad. La resección quirúrgica es curativa en la mayoría de los casos y el pronóstico es excelente aun si hay metástasis al momento del diagnóstico. Se presenta el caso de una paciente de sexo femenino de 21 años de edad, sin antecedentes personales de importancia, quien consultó por dolor abdominal agudo. Se realizó tomografía computarizada, la cual reportó una masa de 75 x 80 x 76 mm en la cola del páncreas, por lo que se llevó a cirugía realizándose pancreatrectomía distal con resección completa del tumor y preservación esplénica. El estudio de anatomía patológica reportó tumor pseudopapilar del páncreas. La paciente tuvo una evolución satisfactoria y hasta el seguimiento a los 16 meses persiste asintomática y no ha presentado recurrencia.

Pseudo papillary tumor of the pancreas is a rare entity most commonly seen in young females. This neoplasm it is a cystic carcinoma of low malignant potential usually diagnosed incidentally because an abscense of typical signs or symptoms. Surgical resection it is usually curative with excellent prognosis even when metastasis are present at the time of diagnosis. We report the case of a 21-year-old female who presented with abdominal pain with no previous history of any abdominal discomfort or pain. Computed tomography showed a 75 x 80 x 76 mm solid mass located at the tail of the pancreas. A distal pancreatectomy with preservation of the Spleen was performed. Pathology reported: pseudo papillary tumor of the pancreas. Evolution was satisfactory with no complication and the follow up at 16 months showed no recurrence. Histological examination confirmed the diagnosis and the complete resection of this tumor has an excellent prognosis with rare recurrences.