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      Renaissance of Minilaparoscopy in the NOTES and Single Port Era

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          Abstract

          The authors suggest that minilaparoscopy should be considered as the most sophisticated evolution of laparoscopic surgery at the present time.

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          Single-incision laparoscopic cholecystectomy: initial evaluation of a large series of patients

          Background Findings have shown that single-incision laparoscopic cholecystectomy (SILC) is feasible and reproducible. The authors have pioneered a two-trocar SILC technique at the University of Texas Southwestern. Their results for 100 patients are presented. Methods From January 2008 to March 2009, 100 patients with symptomatic gallbladder disease underwent SILC through a 1.5- to 2-cm umbilical incision using a two-port (5-mm) technique. For nearly all the patients, a 30° angled scope was used. The gallbladder was retracted, with two or three sutures placed along the gallbladder. These sutures were either fixated internally or placed through the abdominal wall to obtain a critical view of Calot’s triangle. The SILC procedure was performed using standard technique with 5-mm reticulating or conventional laparoscopic instruments. The cystic duct and artery were well visualized, clipped, and divided. Cholecystectomy was completed with electrocautery, and the specimen was retrieved through the umbilical incision. Results In this series, 80 women (85%) and 15 men (15%) with an average age of 33.8 years (range, 17–66 years) underwent SILC. Their mean BMI was 29.8 kg/m2 (range, 17–42.5 kg/m2), and 39% of these patients had undergone previous abdominal surgery. The mean operative time was 50.8 min (range, 23–120 min). The mean estimated blood loss was 22.3 ml (range, 5–125 ml), and 5% of the patients had an intraoperative cholangiogram. There were no conversions of the SILC technique. A two-trocar technique was feasible for 87% of the patients. For the remaining patients, either a three-channel port or three individual trocars were required. A SILC technique was used for 5% of the patients to manage acute cholecystitis or gallstone pancreatitis. Conclusion The SILC technique with a two-trocar technique is safe, feasible, and reproducible. The operating times are reasonable and can be lessened with experience. Even complex cases can be managed with this technique. Excellent exposure of the critical view was obtained in all cases. The SILC procedure is becoming the standard of care for most of the authors’ elective patients with gallbladder disease. Clinical trials are warranted before the SILC technique is adopted universally.
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            Single-incision laparoscopic surgery - current status and controversies

            Scarless surgery is the Holy Grail of surgery and the very raison d’etre of Minimal Access Surgery was the reduction of scars and thereby pain and suffering of the patients. The work of Muhe and Mouret in the late 80s, paved the way for mainstream laparoscopic procedures and it rapidly became the method of choice for many intra-abdominal procedures. Single-incision laparoscopic surgery is a very exciting new modality in the field of minimal access surgery which works for further reducing the scars of standard laparoscopy and towards scarless surgery. Natural orifice translumenal endoscopic surgery (NOTES) was developed for scarless surgery, but did not gain popularity due to a variety of reasons. NOTES stands for natural orifice translumenal endoscopic surgery, a term coined by a consortium in 2005. NOTES remains a research technique with only a few clinical cases having been reported. The lack of success of NOTES seems to have spurred on the interest in single-incision laparoscopy as an eminently doable technique in the present with minimum visible scarring, rendering a ‘scarless’ effect. Laparo-endoscopic single-site surgery (LESS) is, a term coined by a multidisciplinary consortium in 2008 for single-incision laparoscopic surgery. These are complementary technologies with similar difficulties of access, lack of triangulation and inadequate instrumentation as of date. LESS seems to offer an advantage to surgeons with its familiar field of view and instruments similar to those used in conventional laparoscopy. LESS remains a evolving special technique used successfully in many a centre, but with a significant way to go before it becomes mainstream. It currently stands between standard laparoscopy and NOTES in the armamentarium of minimal access surgery. This article outlines the development of LESS giving an overview of all the techniques and devices available and likely to be available in the future.
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              Incisions do not simply sum.

              Critics of minimally invasive methods sometimes argue that the summed lengths of all trocar sites have a morbidity similar to that for an open incision of equal length. This argument assumes correctly that pain and scarring are proportional to the total tension normal to a linear incision. But the argument also assumes that total tension sums linearly with incision length. This report demonstrates why that premise is not valid. Wounds of various sizes are compared using a simple mathematical model. The closing tension perpendicular to any linear incision is a function of the incision's length, varying symmetrically together with a maximum at the midpoint of length. If tension rises linearly across an incision, integration of the tension relationship demonstrates that the total wound tension actually is proportional to the square of the length. In this report, incisions of various lengths are modeled, and plausible alternative incision scenarios for various procedures (e.g., Nissen, appendectomy) are compared. Total tension rises nonlinearly with increasing wound length. Thus, total tension across multiple incisions is always less than the total tension for an incision of the same total length. For example, an open appendectomy creates 2.7-fold more wound tension than a laparoscopic appendectomy. Similarly, two 3-mm trocars create less total tension than a single 5-mm trocar. Conventional incisions are subject to more total tension than any combination of trocar incisions of equal total length. This inequality yields three clinically relevant corollaries. First, it supports the practice of using the smallest effective trocars (or even no-trocar methods) to minimize pain and scar. Second, addition of a trocar in difficult cases adds relatively little morbidity. Finally, using two small trocars is better than using a single larger trocar.
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                Author and article information

                Journal
                JSLS
                JSLS
                jsls
                jsls
                JSLS
                JSLS : Journal of the Society of Laparoendoscopic Surgeons
                Society of Laparoendoscopic Surgeons (Miami, FL )
                1086-8089
                1938-3797
                Oct-Dec 2011
                : 15
                : 4
                : 585-588
                Affiliations
                Oswaldo Cruz University Hospital and UNIPECLIN, Faculty of Medical Sciences, University of Pernambuco; Recife; Brazil.
                Author notes
                Address correspondence to: Av. Boa Viagem 5526B Ap1902 - 51030-000, Recife - PE, Brazil. Tel: +55 81 9971-9698, Fax: +55 81 3325-3318, Email: gc@ 123456elogica.com.br
                Article
                11-03-052
                10.4293/108680811X13176785204832
                3340978
                22643524
                764f3e31-c24e-460e-afa2-a0da15f775ca
                © 2011 by JSLS, Journal of the Society of Laparoendoscopic Surgeons.

                This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives License ( http://creativecommons.org/licenses/by-nc-nd/3.0/), which permits for noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited and is not altered in any way.

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