A modular magnetic anastomotic device for minimally invasive digestive anastomosis: proof of concept and preliminary data in the pig model.

BACKGROUND: The aim of our study was to assess the feasibility of minimally invasive digestive anastomosis using a modular flexible magnetic anastomotic device made up of a set of two flexible chains of magnetic elements. The assembly possesses a non-deployed linear configuration which allows it to be introduced through a dedicated small-sized applicator into the bowel where it takes the deployed form. A centering suture allows the mating between the two parts to be controlled in order to include the viscerotomy between the two magnetic rings and the connected viscera. METHODS AND PROCEDURES: Eight pigs were involved in a 2-week survival experimental study. In five colorectal anastomoses, the proximal device was inserted by a percutaneous endoscopic technique, and the colon was divided below the magnet. The distal magnet was delivered transanally to connect with the proximal magnet. In three jejunojejunostomies, the first magnetic chain was injected in its linear configuration through a small enterotomy. Once delivered, the device self-assembled into a ring shape. A second magnet was injected more distally through the same port. The centering sutures were tied together extracorporeally and, using a knot pusher, magnets were connected. Ex vivo strain testing to determine the compression force delivered by the magnetic device, burst pressure of the anastomosis, and histology were performed. RESULTS: Mean operative time including endoscopy was 69.2 ± 21.9 min, and average time to full patency was 5 days for colorectal anastomosis. Operative times for jejunojejunostomies were 125, 80, and 35 min, respectively. The postoperative period was uneventful. Burst pressure of all anastomoses was ≥ 110 mmHg. Mean strain force to detach the devices was 6.1 ± 0.98 and 12.88 ± 1.34 N in colorectal and jejunojejunal connections, respectively. Pathology showed a mild-to-moderate inflammation score. CONCLUSIONS: The modular magnetic system showed enormous potential to create minimally invasive digestive anastomoses, and may represent an alternative to stapled anastomoses, being easy to deliver, effective, and low cost

2017 update of the WSES guidelines for emergency repair of complicated abdominal wall hernias

Emergency repair of complicated abdominal wall hernias may be associated with worsen outcome and a significant rate of postoperative complications. There is no consensus on management of complicated abdominal hernias. The main matter of debate is about the use of mesh in case of intestinal resection and the type of mesh to be used. Wound infection is the most common complication encountered and represents an immense burden especially in the presence of a mesh. The recurrence rate is an important topic that influences the final outcome. A World Society of Emergency Surgery (WSES) Consensus Conference was held in Bergamo in July 2013 with the aim to define recommendations for emergency repair of abdominal wall hernias in adults. This document represents the executive summary of the consensus conference approved by a WSES expert panel. In 2016, the guidelines have been revised and updated according to the most recent available literature.Peer reviewe

WSES guidelines for emergency repair of complicated abdominal wall hernias

Peer reviewe

Anwendung der Tschebyscheff-Approximation auf analytische Loesungsmethoden zur Feldberechnung

TIB Hannover: DU 404 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Video. Repeated Transvaginal Notes: Is It Possible?

Purpose: Transvaginal surgery has been performed by gynecologists for decades with abundant literature supporting its efficacy and safety. Recently, several groups reported on the NOTES transvaginal (TV) approach for extrapelvic disease. Nevertheless, repeated TV access for NOTES has never been reported to date. Two cases of "repeated" TV access for NOTES cholecystectomy after TV hybrid sleeve gastrectomy are described. Methods: Two women, aged 57 and 32 years, developed symptomatic cholelithiasis respectively 6 and 8 months after TV sleeve gastrectomy for morbid obesity. Sleeve gastrectomy: a 2-cm posterior colpotomy was performed under laparoscopic control between the uterosacral ligaments. A double-channel endoscope and a 60-cm-long laparoscopic grasper were introduced transvaginally. Two abdominal ports were placed to allow the introduction of the stapling device and to assist during the procedure. An intragastric endoscope served to expose the stomach and to calibrate the gastric sleeve, which was performed in the standard fashion. Colpotomy was closed by separate 3/0 Vicryl stitches. At cholecystectomy, an exploratory laparoscopy ascertained the feasibility of a NOTES cholecystectomy. The posterior vaginal vault was carefully examined before regaining peritoneal access with the technique described above. Cholecystectomy was performed by using a double-channel endoscope introduced TV and a 5-mm transabdominal port. Follow-up consisted of 3 and 6 months pelvic examination and interview, which included sexual function assessment by sexual function questionnaire (SFQ31). Results: Both operations were performed successfully with no intraoperative or postoperative complications. At cholecystectomy, minimal pelvic adhesions were found with no vaginal scarring at the colpotomy site. No bleeding, pain, or vaginal infection occurred after both procedures. Patients resumed sexual activity 5.2 weeks postoperatively with a consistently normal SFQ31. Conclusions: This report suggests that, in experienced hands, repeated TV access for extrapelvic surgery is possible and safe, putting forward the intriguing promises of less adhesions formation

A comparison between Raman spectroscopy and surface characterizations of multiwall carbon nanotubes

The distribution of graphene units with an axial symmetry gives rise to different types of carbon filaments: nanotubes, nanofilaments and classical fibers. In this work the surfaces of different multiwalled nanotubes are characteirzed by two complementary techniques: chemical ones based on Total Surface Area and Active Surface Area measurements, associated with a physical approach the Raman scattering spectroscopy. From analysis of Raman data we deduce the values of the in-plane coherence lengths, identified as L1 the planar projection of gaphene sheets, and we propose an analysis for the observed line-width bahavior related to the graphitation step. From coherence length L1 for all types of MWNT. This analysis allows us to show the influence of both, the structural organization and the different treatments on the interfacial characteristics of these nanocarbons