Cheung, TT

Ma, KW

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Title Standardizing laparoscopic left lateral sectionectomy forhepatocellular carcinomaAuthor(s) Ma, KW; Cheung, TTCitationStandardizing laparoscopic left lateral sectionectomy forhepatocellular carcinoma. In Florin Graur & Nadim Al Hajjar(Eds.), Recent Advances in Hepatocellular Cancer. Hyderabad:Avid Science, 2016Issued Date 2016URL http://hdl.handle.net/10722/233418Rights This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.2 3www.avidscience.comRecent Advances in Hepatocellular Cancer          Recent Advances in Hepatocellular Cancerwww.avidscience.comIntroductionLaparoscopic abdominal surgery has been proven to be an effective and safe approach in various abdominal procedures. Good evidences are there in the literatures suggesting laparoscopic surgery is associated with short-er hospital stay, less pain, and non-inferior surgical out-come when compared to open surgery[1-4]. It has been regarded as the standard of care in some operations, such as cholecystectomy, fundoplication and colectomy [5-7].  However, when compared to the hollow organs, the same pace of development was not seen in laparoscopic liver resection. This is partly related to the unique liver anatomy making laparoscopic mobilization, vascular in-flow/outflow control and parenchymal transection a tech-nically challenging task. On the other hand, an incision of certain length is required for delivery of specimen and this obviates the inherent advantages of small incision in laparoscopic surgery [8-10]. Thanks to the advances of laparoscopic instruments and accumulation of experi-ence, many complicated and risky steps during laparo-scopic liver resection are made easier and safer, leading to a number of breakthroughs in laparoscopic resection for Hepatocelullar carcinoma (HCC)[11-14]. While further robust data supporting laparoscopic major hepatectomy to be the gold standard is still eagerly awaited, the benefit of laparoscopic left lateral sectionectomy for both benign and malignant diseases is far less controversial [15-17]. This chapter outlines the knowledge and techniques in-volved in performing a standard laparoscopic left lateral sectionectomy.Chapter 2Standardizing Laparoscopic Left Lateral Sectionectomy for Hepatocellular CarcinomaKa Wing and Tan To Cheung*Division of Hepatoblilary, Pancreatic Surgery and Liver transplant, Department of Surgery, Queen Mary Hospi-tal, The University of Hong Kong, China*Corresponding Author: Tan To Cheung, Division of Hepa-toblilary, Pancreatic Surgery and Liver transplant, Department of Surgery, Queen Mary Hospital, The University of Hong Kong, China, Email: tantocheung@hotmail.comFirst Published January 06, 2016Copyright: © 2016 Tan To Cheung et al.This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and  reproduction in any medium, provided you give appropriate credit to the original author(s) and the source.4 5www.avidscience.comRecent Advances in Hepatocellular Cancer          Recent Advances in Hepatocellular Cancerwww.avidscience.comThe Constant Anatomical Features of Left Lateral SectionLeft lateral section is thin when compared to the right side, and it contributes 15-30% of total liver volume, mak-ing post-hepatectomy liver failure an unusual occurrence. The inter-sectional plane between left medial and left lat-eral section is represented by a constant surface anatomi-cal landmark-the Falciform ligament (Diagram 1). Situ-ated beneath the ligament, is the vertical portion of the left portal vein, which branches off to supply left medial and lateral section. The arterial inflow, biliary drainage, and portal venous branches of each segment and subseg-ment of the left lateral section converge intra-parenchy-mally within the Glissonian sheath on the left side of the falciform ligament, hence all pedicles to segment 2 and 3 will be divided by transecting along the left side of the falciform ligament. When Transection proceeds further cranially along the lateral part of falciform ligament, the left hepatic vein willbe encounteredwhere it can be readily divided.In the Operation TheatreAfter general anaesthesiacommenced, a central line can be placed for better control of central venous pres-sure and volume replacement; this is more important in cirrhotic patientshaving coagulopathy. Ideally the CVP should be kept less than 5cmH2O by fluid restriction dur-ing transection in order to minimize venous oozing. Fluid replacement could be resumed once parenchymal tran-section is completed. Urinary catheterization and invasive blood pressure monitoring with radial arterial line should be available as per other major operations. Pneumatic de-vice is advisable to minimize thromboembolic risk. Pa-tient’s body should be prepared and draped from nipple level to mid thigh. Hair especially those over the suprapu-bic area, should be removed with clipper.Diagram 1: Standard anatomy and line of transection in left lateral sectionectomy.6 7www.avidscience.comRecent Advances in Hepatocellular Cancer          Recent Advances in Hepatocellular Cancerwww.avidscience.comPositioning and Ports SitingPatient should be in Lloyd-Davis position with bilat-eral arm abducted. The operating table should be tilted with a 30-degree Trendelenburg adjustment. At least two surgeons should be involved in the operation with the chief surgeon stood between patient’s leg and the assistant surgeon stood on the side of patient facing the laparo-scopic display (Diagram 2).  Under normal circumstanc-es, three ports will be required for the operation. Firstly, a 10mm port is created at the subumbilical region (this port might be placed at the supra-umbilical region instead for patients with long abdominal parachute) with open di-rect cut down technique. This is followed by creation of CO2 pneumoperitoneum. The intra-abdominal pressure should be maintained at 12cmH2O. A second 12mm port should be introduced at the epigastric region (but avoid-ing insertion into the falciform ligament) for access of ul-trasound device, laparoscopic ultrasound probe, vascular stapler and optional laparoscopic Clavitron ultrasonic as-pirator (CUSA). One 5 mm working port would be in-troduced in the right subcostal area. One optional 5 mm working port might be introduced in the lateral aspect of the right subcostal area.Diagram 2: Illustrating patient, surgeon and port position.Surgical TechniqueThe surgeon and scrub nurse should ensure all nec-essary instruments are ready and functioning properly (Table 1). The operation should begin with diagnostic laparoscopy to look for any obvious peritoneal deposit. The liver surface is then inspected for the tumour loca-tion and surface anatomy. A thorough ultrasonography 8 9www.avidscience.comRecent Advances in Hepatocellular Cancer          Recent Advances in Hepatocellular Cancerwww.avidscience.comof both lobes of the liver would be performed to search for additional tumor. The portal vein, hepatic vein, and hepatic artery would be assessed for possible tumor in-vasion. After ultrasound evaluation, the round ligament should be taken down using the ultrasonic dissector as close to abdominal wall as possible, this is to avoid redun-dant peritoneum that may dangle in front of the laparo-scope. Liver parenchymal transection is carried out with ultrasonic dissector and CUSA along the lateral border of the falciform-round ligament complex (Figure 1). Smaller vessels or pedicles less than 5mm are safely sealed with modern energy sources. Pringle’s maneuver is not usually required during transection. Larger portal structures (S2 and S3 pedicle) encountered along this transection plane will be divided using vascular stapler of cartridge height 2-3.5mm depends of situation. Towards the end of tran-section, left hepatic vein (LHV) would be encountered. The left triangular ligament adjacent to the left hepatic vein would be divided just wide enough for the passage of the blade of vascular stapler (Figure 2). The reason for sparing the left triangular ligament until after division of LHV is that, in case of bleeding from transection surface, the triangular ligament can act as a fulcrum of the lever system and to control the bleeding by elevating the left lateral section against the abdominal wall. Subsequently, the attachments of LLS are freed and the specimen is put into a 12cm EndocatchTM and delivered via a Pfennenstial incision, which is safeguarded by a wound protector. Af-ter delivery of the specimen, the Pfennenstial wound is temporary sealed by twisting the wound protector, pneu-moperitoneum is re-established and laparoscope is rein-troduced. Transection surface is meticulously examined for any bleeding. The pneumoperitoneum pressure would be lowered to 6mmHg to look for any bleeder. Monopo-lar or bipolar diathery coagulation, argon beam coagula-tion, application of metal clips, local haemostatic material such as Haemopatch and intra-corporeal suturing are all effective means for haemostasis. In case of bile leakage, metal clips and suturing could be applied. Drain is not necessary under usual circumstances. After haemostasis is secured, wound protector and ports are removed. Local anaesthetic agent is infiltrated to the preperitoneal layer and the wound should be closed in usual manner and skin should be apposed with subcuticular stitches. If the above procedures were taken place smoothly, most left lateral sectionectomy could be completed in less than 2 hours. Post-operatively, patients will be allowed to have sips of water on postoperative day 1 and resume soft diet on post-operative day 2 and discharged home on post-operative day 3.10 11www.avidscience.comRecent Advances in Hepatocellular Cancer          Recent Advances in Hepatocellular Cancerwww.avidscience.comTable 1: Armamentarium for laparoscopic left lateral sectionectomy.Figure 1: Dissection along the lateral border of falciform ligament. Figure 2: DDivision of left hepatic vein with vascular starrrrpler.DiscussionOpen approach of left lateral section resection has been standardized amongst all sorts of minor liver resec-tion, it will be an ideal procedure to be performed by lapa-roscopic approach using smaller wounds at less obvious sites. Although experienced surgeons could perform open left lateral sectionectomy over a 5-cm midline wound, the procedure may not be easy as the assistant and the scrub nurse will have difficulties in assisting the operation through a limited exposure. Using laparoscopic approach, the operation field will be clearly seen. With the aid of cur-rent high definition video system, the magnification of the lens will allow a very meticulous dissection of the tissues Instrument Quantity30-degree laparoscope 110mm telescope port 112mm working port 15mm port working port 1Laparoscopic ultrasound 1Laparoscopic CUSA (Optional)Thunder beat dissectors (OlympusTM) /Sono-surg (OlympusTM)/ Harmonic scalpels (Ethi-conTM)/ Sonocision (Medtronic)1Stapling device with 2.5-3mm cartridge Stapler x1, cartridge x 2Multi-firing metal clips 1 (small and medium size) (optional)Haemolok 1(large and extra large) (optional)Laparoscopic Argon bean coagulator 1 (optional)12cm endo catchTM 1Wound protector 1 (optional)12 13www.avidscience.comRecent Advances in Hepatocellular Cancer          Recent Advances in Hepatocellular Cancerwww.avidscience.comand liver parenchyma. It has been reported that laparo-scopic liver resection is associated with reduced blood loss, shorter hospital stay, better post-operative pain con-trol and similar oncological outcome [17-20]. In both First and Second International Consensus Conference on Laparoscopic Liver Resection, laparoscopic left lateral sec-tionectomy had been recommended as the standard prac-tice [21,22]. However, this statement did not gain support from all the juries in Morioka consensus [21] due to the fact that most of the evidencepresentedwere from seriesof colorectal liver metastasis. We recently published a series HCC patients who received laparoscopic left lateral sec-tionectomy, majority of the patients had liver cirrhosis as evidenced by pathological examination [16]. The finding of less blood loss and comparable oncological outcomes suggested that, laparoscopic left lateral sectionectomy should be a superior treatment for HCC in cirrhotic pa-tient. Classically, performing liver resection in cirrhotic patient is more difficult than those without cirrhosis in terms of haemostasis. This is explained by the presence of portal hypertension and thrombocytopenia [23]. With the use of laparoscopic approach,bleeding is slowed down or even temporarily stoppedby the intra-abdominal pressure, this allowsample time for a targeted haemostasis by means of clip application or suture plication.  Laparosocpic live resection has been proven to be effective treatment in pa-tients with liver metastasis and patients with HCC even with cirrhosis.[24].A standardized laparoscopic left lateral sectionectomy is agood starting point and surgical exercise for hepato-biliary surgical traineeto get familiarized with the laparo-scopic environment and techniques before they embark onfurther major laparoscopic resection.ConclusionLaparoscopic left lateral sectionectomy is a well-rec-ognized standard procedure in many leading hepatobil-iary surgical centers around the world. As compared to open resection, its simplicity, repeatability, better surgi-cal and comparableoncological outcome make it an ideal treatment option for HCC patients.References1. Brunt LM, Lairmore TC, Doherty GM, Quase-barth MA, DeBenedetti M. Adrenalectomy for familial pheochromocytoma in the laparoscopic era. Ann Surg. 2002; 235: 713-720.2. Law WL, Chu KW, Tung PH. 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Standardizing laparoscopic left lateral sectionectomy for hepatocellular carcinoma

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