A modified technique of single-incision laparoscopic hepaticojejunostomy for children with choledochal cysts
To present a modified laparoscopic surgical technique that works to optimize the surgical view in laparoscopic total excision of choledochal cyst in pediatric patients.
From June 2015 to June 2017, a total of 48 pediatric cases of choledochal cyst were admitted. Their age ranged from 15 month to 8 years (average 3.5 years). The Todani types were: type I (n = 32) and type IVa (n = 16), according to the diagnostic criteria of ultrasound, abdominal computed tomography (CT) and magnetic resonance cholangiopancreatography (MRCP).
Total cystic excision with hepaticoenterostomy was accomplished laparoscopically in 48 cases with our transumbilical single -incision method without conversion to open surgery. Average duration of operation was 200 min (range 170–240 min), average intraoperative blood loss was 9 ml (range 6–14 ml) without the need for blood transfusion. The 72-h postoperative ultrasound reported no abdominal effusion, when the intraperitoneal drainage tube was removed. There was no postoperative complication during the 6 months of follow-up.
We accomplished the same postoperative outcome in laparoscopic total cyst excision with our modified method as that with conventional laparoscopic surgery. This technique allows the operator to have a stabilized surgical view without needing to rely on an assistant to hold up the liver lobe for larger operative space.
KeywordsCholedochal cyst Laparoscopy Anastomosis Minimally invasive surgery Transumbilical
Magnetic resonance cholangiopancreatography
Single-incision laparoscopic cyst excision and Roux-en-Y hepaticojejunostomy
Since Farello et al.  first reported laparoscopic surgery for choledochal cyst (CC) excision in 1995, minimally invasive surgery has been increasingly used in the surgical intervention of CCs, which are congenital disorders manifested as cystic dilatation of the biliary ducts. CCs are primarily diagnosed before the age of 10 . Pediatric CC is rare in western countries but common among East Asian populations, and affects girls much more often than boys.
Conventionally, the standard approach in open surgery for CC treatment includes total cyst excision and Roux-en-Y hepaticoenterostomy, preferably hepaticojejunostomy . In China, laparoscopic total cyst excision with Roux-en-Y hepaticojejunostomy was first reported in the treatment of congenital CC in 2002, since which it has increasingly become the method of choice in the management of pediatric CC in some large hospitals . The Roux-Y jejunojejunostomy anastomosis is typically performed extracorporally with the jejunum taken out through an umbilical incision. In recent years, single-incision laparoscopic cyst excision and Roux-en-Y hepaticojejunostomy (SILH) has been widely adopted for better cosmetic results and quicker recovery, and postulated to be comparable with conventional laparoscopic methods in surgical outcome [5, 6].
However, laparoscopic surgery for cyst excision is a technically challenging procedure and largely depends on the experience of the surgeon. Since 2015, we have adapted to laparoscopic CC excision in our pediatric department using a modified transumbilical single-incision method, and achieved satisfactory postoperative outcome. We present in this paper a technique used in our single-incision laparoscopic surgery for total CC excision that allows the operator to have a stable and enlarged surgical view without relying on a surgical assistant to expose the operative target or to provide a steady view.
A total of 48 pediatric patients of congenital CC underwent total cyst excision via transumbilical SILH in our department during June 2015 and June 2017. Among these, 35 cases were female and 13 male, 15 months to 8 years of age (average 3.5 years). Preoperative ultrasound, computed tomography (CT), and magnetic resonance cholangiopancreatography (MRCP) were performed to confirm the diagnosis of CC. According to the Todani classification , 32 cases were type I and 16 type IVa.
Routine preoperative intestinal lavage was performed, indwelling gastric tube and catheter to empty the stomach, colon and bladder.
The patient was placed in a supine position with head lifted at 30° and slightly tilted to the left, upper abdomen and lumbar elevated, intravenous-inhalation general anesthesia administered with caudal block.
Carbon dioxide pnumoperitoneum was established at a pressure of 10-12 mmHg.
Pull the duodenum with forceps, the ultrasonic scalpel kept to the cyst wall, and separate the CC wall towards the thinning distal end of the cyst converging with the pancreatic duct, clip the distal end of the common bile duct with a hemo-lock, then resect the distal cyst wall. In a similar fashion, separate the proximal part of the cyst wall with an ultrasonic scalpel, to its normal junction with the hepatic duct; identify the opening of the left and right hepatic duct, then transversely dissect and resect the proximal cyst.
Rinse the peritoneal cavity, then guide the drainage tube through the Trocar hole on the right of the umbilicus to the Winslow hole.
All patients underwent laparoscopic complete excision of congenital CC, with Roux-en-Y jejunojejunostomy and hepaticojejunostomy. Operative time was 170–240 min (average 200 min); intraoperative blood loss was 6-14 ml (average 9 ml). No intraoperative or postoperative transfusion was needed; and there was no conversion to open surgery. The hepaticojejunostomy anastomosis was 0.9–1.2 cm in diameter.
Abdominal drainage tube was removed three days after the procedure. No seroperitoneum was observed on postoperative ultrasound B examination. None of the patients had intraoperative complications. The pediatric patients resumed ambulation in 24 h, resumed food intake in 48 h, and resumed normal activity, pain from the incision completely relieved, in five days post-surgery. Length of hospital stay was 6–9 days, no infection of the wound was observed.
During the six months of follow-up, ultrasound scan found no dilatation of the common hepatic duct or the intrahepatic bile duct. No case of bile reflux gastritis or cholangitis was found.
The incidence of CC is much higher in East Asian than in western countries. Especially in Japan, reportedly 1:1000 live births is diagnosed with CC, and the female to male ratio is as high as 4:1 .
For congenital CC patients, the key in successful management is total cyst excision with correction of the pancreaticobiliary maljunction (PBM), and reconstruction of the biliary tract [3, 9]. Majority of the cases are, by the Todani classification, type I (cystic or shuttle dilatation of the common bile duct), and type IVa (fusiform dilatation with extensions of dilatations of the intrahepatic bile ducts) CCs, for which it is crucial to perform wide hilar hepaticojejunostomy following complete cyst excision [2, 10]. Farello was first to report in 1995 the use of EndoGIA and Endostapler in laparoscopic complete cyst excision in CC surgery, and the use of 4–0 interrupted suture and cellulose glue in bilioenteric anastomosis: patients recovered uneventfully and were discharged in seven days . Diao et al. first reported transumbilical single-port laparoscopic surgery with Roux-en-Y hepaticojejunostomy in children with congenital CCs and had satisfactory outcome . Improved cosmesis is only an added benefit with a single-port laparoendoscopic approach compared with multi-port surgery. With less invasion, patients can recover and resume to normal activity more quickly, experience less pain and shorter hospital stay, given that the surgery is performed with equivalent precision.
In recent years, increasingly more adoptions of the single-site laparoscopic approach have been reported for surgical management of CC, and other general surgical procedures, including cholecystectomy and transperitoneal pyeloplasty [11, 12, 13]. Yet, reports of the application of SILH in the pediatric population are limited, perhaps because the technique of single-port laparoscopic reconstruction performed on children requires experienced hands that can maneuver in the very limited operative field. Moreover, there is a lack of surgical equipment specifically designed for pediatric laparoscopic operations.
We have adopted a modified transumbilical single-incision laparoscopic technique that offers the surgeon more control of the operative field. The operator can have a better/enlarged and stabilized operative view compared with conventional laparoscopic methods in which a surgical assistant is needed to perform the duties of exposing the hilum and other intended surgical areas. With this technique, lifting sutures are applied to pull and hold the liver lobe and the surgical view is enlarged and stabilized, which is particularly useful in laparoendoscopic pediatric surgery where the surgical space is often covered and concealed.
In addition, this technique can help enlarge and stabilize the operative field by minimizing the movement of local tissue, which facilitates the handling of dissection and anastomosis. This technique is simple and easily reproducible. It can be accomplished by: a) stitch and lift the round ligament and the gallbladder fundus with suture before separating and dissecting the cyst; b) stitch and lift the common hepatic duct before the hepaticojejunostomy anastomosis. With the tension and traction created by the lifting, creases are minimized and anastomosis is easier to perform as there is less of a chance to miss a stitch.
However, the lifting suture is meant to hold stable the surgical view and to offer the operator more control of the surgical field. This technical modification does not change the nature or the essence of a SILH approach, but to offer a better surgical experience. We described the clinical outcome during the 6-month follow-up of our pediatric patients undergoing this version of SILH when it started to be performed as standard of care in our hospital in 2015. Long term outcome will need to be examined when the cohort is followed for an intended 10-year time frame.
Critical voices have also been heard, regarding the single-site approach in the management of CC . More long term observations and studies would be needed to resolve the debate and it is beyond the scope of our current work on the technical profile.
In summary, single-incision laparoscopic cyst excision with hepaticojejunostomy has become the mainstream surgical management for CC in China, where the condition is commonly presented in children. Our modified SILH method with a lifting technique offers a simple and reproducible tool for surgeons to have more control over the operative field and improved surgical experiences.
We thank Dr. Ying-Ying Yu, for moral support and linguistic assistance she has generously provided.
This study received no funding from any source.
Availability of data and materials
The clinical data used in this study are available from the corresponding author on reasonable request.
DX and SH drafted the manuscript and conducted all the relevant investigations in the process. KT contributed to editing and revising the manuscript. SH performed all the operations in this series and was a major contributor. All authors read and approved the final manuscript.
Ethics approval and consent to participate
This was a report of clinical practice as well as surgical experience, which is part of a large study of pediatric CC patients. The study received ethics approval by the Fujian Provincial Hospital Ethics Committee. Written consent to participate was obtained from all patients (in this case, their parent or legal guardian) undergoing laparoscopic single-incision total cyst excision surgery in our department.
Consent for publication
The authors declare that they have no competing interests.
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