Towards a better knot: Using mechanics methods to evaluate three knot-tying techniques in laparo-endoscopic single-site surgery.

Introduction: Knot tying is difficult but important for laparo-endoscopic single-site surgery (LESS). There are several techniques for LESS knot-tying. However, objective assessment of these skills has not yet been established.

Development of a measurement system for laparoendoscopic single-site surgery: reliability and repeatability of digital image correlation for measurement of surface deformations in SILS port.

Objective: Analysis of mechanical measurements in laparoendoscopic single-site surgery (LESS) is important for instrument design and surgical simulators. The aim of this study was to develop a measuring system for different instruments and manipulations in LESS using a single-incision laparoscopic surgery (SILS) port.

Methods: The loads on the SILS port were applied and recorded by the universal material testing machine by the following method.

Mechanical evaluation of articulating instruments and cross-handed manipulation in laparoendoscopic single-site surgery.

Background: Laparoendoscopic single-site surgery (LESS) is limited by loss of triangulation and internal instruments conflict. To overcome these difficulties, some concepts have been introduced, namely, articulating instruments and cross-handed manipulation, which causes the right hand to control the left instrument tip and vice versa. The aim of this study was to compare task performance with different approaches based on a mechanical evaluation platform.

Mechanical evaluation of three access devices for laparoendoscopic single-site surgery.

Background: Many access devices have been developed for laparoendoscopic single-site surgery (LESS) during recent years. However, investigations are needed to determine which port is most suitable for this relatively new technique. The aim of this study was to evaluate commonly used ports using mechanical approaches in a training simulator.

Single-port laparoscopic intragastric surgery using SILS port: a feasibility study on a porcine model.

Objective: The aim of this study was to evaluate the feasibility, safety, and efficiency of single-port laparoscopic intragastric surgery by using a single-port device.

Methods: The single-port device was introduced into the anterior wall of the stomach through 2.5-cm long abdominal and gastric incisions.

Covert laparoscopic cholecystectomy:a new minimally invasive technique.

To further improve our developed transumbilical endoscopic surgery (TUES), we developed a completely covert laparoscopic cholecystectomy (LC). Twelve cases of LC were recruited for this new approach. First, a 10-mm trocar was placed above the umbilicus for inserting the laparoscope.

Transumbilical endoscopic surgery: History, present situation and perspectives.

Transumbilical endoscopic surgery or laparo-endoscopic single site (LESS) surgery has become an exciting area of surgical development as innovation continues to move in the 21(st) century to minimally invasive surgery. The history, present situation and perspectives are reviewed and the nomenclature of this technique is discussed in this article. The range of this technique has been applied in almost all abdominal diseases, surgeries for morbid obesity, hernia and so on, in recent years.

Totally transumbilical endoscopic cholecystectomy without visible abdominal scar using improved instruments.

Objective: The major barrier to transumbilical endoscopic surgery is external interference between the instrument handles around the umbilicus. We describe technique of totally transumbilical endoscopic cholecystectomy using improved instruments.

Methods: New trocars (5 and 3 mm in diameter, respectively) without proximal seal system on the sleeves were designed for this procedure.

Transumbilical endoscopic surgery: a preliminary clinical report.

Objective: There has been great interest in natural orifice transluminal endoscopic surgery (NOTES) in recent years. We report another new approach--transumbilical endoscopic surgery (TUES)--which we have performed in 40 cases for liver cysts (3), bleeding ascites (1), chronic appendicitis (10), and gallbladder diseases (26).

Methods: Transumbilical endoscopic liver cyst fenestration, abdominal cavity exploration, appendectomy, and cholecystectomy were performed in a total of 40 patients.

Transumbilical endoscopic cholecystectomy with the trichannel trocar technique: a porcine feasibility study.

The aim of this study is to verify the feasibility of another option: transumbilical endoscopic cholecystectomy by using the trichannel trocar technique. Eight domestic pigs were submitted to transumbilical endoscopic cholecystectomy by using the trichannel trocar technique. A fine grasper of 2 mm in diameter was inserted through a small skin incision on the right upper abdomen for grasping the gallbladders.