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Laparoscopic Cholecystectomy Using 2-mm Instruments

1998, Journal of Laparoendoscopic & Advanced Surgical Techniques

Today, laparoscopic cholecystectomy is the method of choice for treatment of symptomatic gallbladder disorders. It minimizes effects of the operation that are independent of the gallbladder, such as trauma to the abdominal wall and other soft tissue. The surgical wounds were even smaller when 2-mm trocars were used. Laparoscopic cholecystectomy using 2-mm instruments was performed in a consecutive series of 14 patients with symptomatic gallstones. The procedure was completed in 12 cases, with conversion to open surgery in two cases. Intraoperative cholangiography was always performed. The postoperative course was always uneventful. The cosmetic effect was highly satisfactory. The procedure using 2-mm instruments could be indicated in selected patients with uncomplicated gallstone disease.

JOURNAL OF LAPAROENDOSCOPIC & ADVANCED SURGICAL Volume 8, Number 5, 1998 Mary Ann Liebert, Inc. TECHNIQUES Laparoscopic Cholecystectomy Using SELMAN 2-mm Instruments URANUS, M.D., F.A.C.S.,1 ZHIHAI PENG, M.D.,2 LEO KRONBERGER, M.D.,1 JOHANN PFEIFER, M.D.,1 and BEHROOZ SALEHI, M.D.1 ABSTRACT Today, laparoscopic cholecystectomy is the method of choice for treatment of symptomatic gallbladder disorders. It minimizes effects of the operation that are independent of the gallbladder, such as trauma to the abdominal wall and other soft tissue. The surgical wounds were even smaller when 2-mm trocars were used. Laparoscopic cholecystectomy using 2-mm instruments was performed in a consecutive series of 14 patients with symptomatic gallstones. The procedure was completed in 12 cases, with conversion to open surgery in two cases. Intraoperative cholangiography was always performed. The postoperative course was always uneventful. The cosmetic effect was highly satisfactory. The procedure using 2-mm instruments could be indicated in selected patients with uncomplicated gallstone disease. INTRODUCTION replaced Laparoscopic managing symptomatic widely gallstone lower.1,2 has open cholecystectomy, and currently is the gold disease. Overall, the mortality rate is the same as for The minimal trauma to the abdominal wall is one open cholecystectomy, but the morbidity is far of the main reasons for the lower morbidity; other advantages of this method are shorter hospital stay, better cosmetic effect, and last but not least, lower treatment costs. To reduce soft-tissue trauma even further, we used 2-mm trocars with suitable instruments rather than the usual 5-mm and 10/11-mm trocars. cholecystectomy standard for MATERIALS AND METHODS Optic and instruments (Fig. 1) The 2-mm instruments currently available include grasping forceps and metal scissors. The newest development is disposable 2-mm scissors with an insulated surface that can be used for electrocoagulation. Except for these new scissors, the instruments can be sterilized and reused. The disposable plastic trocars have an inner diameter of 2 mm and a safety closing mechanism at the tip. The 2-mm optic differs from the usual optics in that the image is transmitted via glass fiber bundles •Department of General Surgery and Department of School of Medicine, Graz, Austria. 2Shanghai First People's Hospital, Shanghai, China. University Surgical Research, University Surgical Clinic, 255 Karl-Franzens URANUS ET AL. FIG. 1. Optic (2-mm) and instruments. (1) trocars, (2) grasping forceps and scissors, (3) light cable, and (4) optic. (about 30,000-50,000) rather than a system of lenses. The image can be enlarged with a C-mount coupler. The 70° visual field is smaller than with the 10-mm optic, which has a visual field of over 90°. The visual capacity is somewhat limited with the 2-mm optic, and the image quality is poorer than with conventional 10-mm optics. Surgical techniques Four trocars are used (Fig. 2). Pneumoperitoneum is established with a Verres® needle through a 2-mm trocar in the supraumbilical fold, then the 2-mm optic (Auto Suture, U.K.) is installed through it. After placing another 2-mm trocar on the epigastrium, the optic is changed on the epigastrium and the umbilical 2mm trocar is removed and replaced with a 10/11-mm trocar. Two further 2-mm trocars are placed sub- costally in the usual way. Grasping forceps with a 2-mm diameter are inserted through the subcostal ports. The umbilical port is the working canal. The bile duct and the cystic artery are clipped through this port with a 10-mm clip setter. We usually remove the specimen through the umbilicus and use this trocar for 5or 10-mm instruments and cholangiography. Theoretically, smaller trocars could also be used umbilically, but as a larger opening is needed in any case at the end of the operation to remove the specimen, it is not feasible to use a small trocar there. Preparation usually starts caudal from the infundibulum with the bile duct, which is clipped toward the gallbladder and incised just below it. The cholangiography catheter is introduced with a basket forceps (Storz®, Tuttlingen, Germany) (Fig. 3). Our success rate for dynamic fluoroscopy is about 95%. PATIENTS Currently, 14 patients have undergone surgery using this method. Each patient underwent elective cholecystectomies for symptomatic gallstone disease. Thirteen were female, aged 31 to 60 years. Two cases (nos. 2 and 4) at the beginning of our series required conversion to open technique. One of them (no. 2), had chronic renal failure in the compensatory stage with creatinine of 5 mg% and 150 mg urea. 256 LAPAROSCOPIC CHOLECYSTECTOMY USING 2-mm INSTRUMENTS FIG. 2. Trocar placement. (1) working port, (2) optic, and (3) and (4) grasping forceps. RESULTS The cholecystectomy was completed laparoscopically in 12 patients. The patient (no. 2) with renal failhad an extremely short cystic duct, and the normal caliber common bile duct (CBD) was displaced laterally. As it was not possible to visualize the upper part of the CBD with intraoperative cholangiography (IOC), we opted for a conventional approach to prevent accidental injury to it. Patient No. 4 was converted to the conventional approach owing to subacute inflammation of the gallbladder, which hindered visibility due to increased bleeding. There were no intraoperative complications. The patients whose cholecystectomies were completed via the laparoscopic route did not require drains and were discharged on the second to fourth postoperative day. ure 257 URANUS FIG. 3. ET AL. Intraoperative cholangiography through the 10/11-mm trocar. The patients with conversions were discharged on the fifth day. Due to the small size of the trocars, the cosmetic effect of the 2-mm incisions was highly satisfactory (Fig. 4). DISCUSSION Thanks to continuing experience in laparoscopic surgery and improvements in equipment, today every abdominal organ is accessible for laparoscopic surgical procedures, which now account for approximately 30% of abdominal operations.3 One of the greatest advantages of the minimally invasive technique is that surgery can be performed as needed on the respective organs with minimal trauma to tissue, especially the abdominal wall, that is not involved in the disease. This basic idea behind laparoscopic surgery led us to reduce as far as possible the wound surface created by the insertion of trocars. With the 2-mm technique, the insertion sites for ports can be kept so small as to be virtually invisible. FIG. 4. Cosmetic result on the fifth 258 day after cholecystectomy. LAPAROSCOPIC CHOLECYSTECTOMY USING 2-mm INSTRUMENTS The small size of the wounds reduces the danger of wound infection, and scar or trocar hernias can be ruled out. Theoretically, it would be possible to avoid using a 10/11-mm trocar in the umbilical region by using a clip applicator through a 5-mm trocar. However, because the gallbladder and the stones are removed through this port incision, this reduction in the umbilical region would be pointless. If the gallstones are so large as to require a larger opening, the gallbladder can be removed through a suprapubic (Pfannenstiel) in5-mm cision. Then it would be feasible to use a 5-mm trocar at the umbilicus. We used the umbilical trocar as the working port, as we did not have any 2-mm instruments with surface insulation for coagulation when we did this series, and so were obliged to use the usual 5-mm dissecting forceps and scissors, which had to be inserted through the umbilical trocar. When suitable 2-mm instruments go into series, it will be time to rethink the position of the instruments and optics. Bile duct injuries are the worst complication of cholecystectomy. There is no doubt that the incidence of ductal injuries is higher in laparoscopic surgery.3-5 The value of cholangiography for discovering anomalies and variations in the bile duct system (in 10% of cases) should not be underestimated. We perform IOCs routinely during all open and conventional laparoscopic cholecystectomies, and the operations performed with the 2-mm technique were no exception. IOC extends the operating time by no more than 5-10 minutes because the image is immediately available. The pros and cons notwithstanding, cholangiography can serve to prevent bile duct injuries with their debilitating and life-threatening sequelae.5 The diagnosis of the anatomic variation in the cystic bile duct in patient no. 2 illustrates this point. The limited visual field of the 2-mm optic does pose a certain risk. The minigrasping forceps are not suitable for an engorged and/or inflamed gallbladder. In these cases, conversion to 10-mm optic and 5-mm instruments is possible. This involves more equipment and instruments, but is a good alternative when unforeseen problems arise. For these reasons, we find at present that the 2-mm technique is best suited to selected elective cases. A widening of the range of indications would, however, be thinkable in the future with improved optics and instruments. REFERENCES 1. Perissat K: 2. Laparoscopic cholecystectomy. Tagle FM, Lavergne J, Barkin JS, The Unger SW: European experience. Am J Surg 1993;165:444-449. Laparoscopic cholecystectomy in the elderly. Surg Endose 1997; 11 : 636-638. Complications of laparoscopic cholecystectomy. Surg Endose 1998;12:291-293. 4. Regöly-Merei J, Ihasz M, Szeberin Z, Sandor J, Mate M: Biliary tract complications in laparoscopic cholecystectomy. Surg Endose 1998;12:294-300. 5. Carroll BJ, Birth M, Phillips EH: Common bile duct injuries during laparoscopic cholecystectomy that result in litigation. Surg Endose 1998;12:310-314. 3. Berci G: Address reprint requests to: Selman Uranus, MD, FACS Universitätsklinik für Chirurgie Auenbruggerplatz 29 A-8036 Graz, Austria 259