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Videosurgery and Other Miniinvasive Techniques
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vol. 5
 
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Case report

Transumbilical single-incision laparoscopic inguinal hernia repair – feasibility study on anatomical specimens

Andreas Kirschniak
,
Thomas Shiozawa
,
Markus Küper
,
Frank A. Granderath

Videosurgery and other miniinvasive techniques 2010; 5 (2): 72-75
Online publish date: 2010/07/01
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Introduction
With the beginning of the natural orifice transluminal endoscopic surgery (NOTES) era, a new spirit came into the scientific world, inventing new approaches to the abdominal cavity and reducing incisions through the abdominal wall. With this technique it is assumed that less postoperative pain, faster recovery and reduced abdominal scarring can be achieved [1]. For this, organs such as the vagina [2-4], the colon [5] or the stomach [6, 7] are penetrated.
However, development in this area remains static. Only transvaginal cholecystectomy seems to be entering clinical practice. Reasons for this are damage to healthy hollow organs, deficit of sufficient and secure closure of the lesions, contamination of the abdominal cavity and geometrical and mechanical problems. These seem to be the reasons why newer reports deal with laparoscopic single incision procedures, reducing the skin lesions to one scar sub- or transumbilically.
In the literature different surgical procedures for different indications are described. First of all, cholecystectomy was established. After that, some reports described sigmoid resections, sleeve gastrectomies, appendicectomies, adrenalectomies and other procedures. Concerning single incision inguinal hernia repair, the first clinical cases could be found which describe a single incision total extraperitoneal hernia repair [8-13]. Two clinical case reports could be found which describe transabdominal laparoscopic hernia repair using a special port system [14, 15].
We describe the technical feasibility of laparoscopic single incision transabdominal preperitoneal hernioplasty (TAPP) using one 15 mm subumbilical skin incision and three 5 mm trocars. This study was performed on anatomical specimens.

Case report
With respect to ethical considerations we prepared three human cadavers (79-95 years, 2 male, 1 female) donated for research and medical education to the Institute of Anatomy, University of Tuebingen. The cadavers were preserved with alcohol-glycerol and stored air tightly under refrigerated conditions (8°C). Fixation allows the preservation of tissue properties [16].
For laparoscopy we used standard laparoscopic equipment (Karl Storz, Tuttlingen, Stuttgart). Three trocars with a working channel of 5 mm and one trocar with a working channel of 10 mm were used, which replaces one 5 mm trocar during the procedure. For visualisation, a 5 mm laparoscope with 30 degree angle was used. As instruments for preparation, we used rotatable arcuated instruments (Covidien, USA).
The relevant steps of laparoscopic transumbilical single incision preperitoneal hernioplasty are adapted to transabdominal preperitoneal hernioplasty (TAPP). After positioning in a head-down position an approximately 15 mm long subumbilical skin incision is performed. After that, we insert the Veress needle and establish a pneumoperitoneum. The trocars are set separately through the abdominal wall in a triangular setting. The medial one is placed cranially, and the lateral two 5 mm trocars are set caudally (Figure 1). The laparoscope is inserted into one lateral trocar, opposite to the prepared site.
The grasping instrument is inserted through the left trocar, and the scissors through the right port.
The peritoneum is cut and the preperitoneal fat tissue is prepared (Figure 2). The inguinal region is prepared analogously to the TAPP procedure. In preparing the medial region and the symphysis, the arcuated instruments are used (Figure 3). After finishing the preparation, the right 5 mm trocar is changed to a 10 mm trocar and the prostheses can be inserted when used (Figure 4). The mesh is fixed using a protac® device. The peritoneum could be adapted using prolene 2/0 running suture (Figure 5).
All procedures could be finished and the steps described could be finished. The procedure time was 45.5 min on average (35-55 min, ±7 min).

Discussion
Single incision laparoscopic hernia repair seems to be possible and feasible using available laparoscopic instruments. However, from an ergonomic point of view, there is need for improvement for it to become established in clinical practice.
The anatomical specimen, apart from computer simulation, is the only model for simulating procedures in the inguinal region. However, the prepared specimen had no relevant inguinal hernia and the results must be interpreted from this point of view.
Using only one skin incision for laparoscopic surgery, one has to distance oneself from the triangulation idea. The instruments are inserted parallel to the abdominal cavity. In our opinion, the arcuated instruments help in preparation.
Different accesses are described in the literature. Most single incision procedures are performed using a single port with three separate trocars. We used three 5 mm trocars inserted separately through the fascia into the abdominal cavity. At the end of the procedure we changed one 5 mm trocar to a 10 mm port for inserting the mesh. With this procedure, only small lesions into the fascia are necessary. A large facia lesion is avoided.

Dr. Andreas Kirschniak, Dr. Thomas Shiozawa, Dr. Markus Küper and Prof. Dr. Frank Granderath have no conflicts of interest or financial ties to disclose.

References
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Copyright: © 2010 Fundacja Videochirurgii This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) License (http://creativecommons.org/licenses/by-nc-sa/4.0/), allowing third parties to copy and redistribute the material in any medium or format and to remix, transform, and build upon the material, provided the original work is properly cited and states its license.
  
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