Is laparoscopic liver resection safe and comparable to open liver resection for hepatocellular carcinoma?

Safety and effectiveness of fluorescence laparoscopy in precise hepatectomy: A meta-analysis

BACKGROUND

To perform a systematic review of the safety and effectiveness of fluorescence laparoscopy-guided precise hepatectomy.

METHODS

We searched the PubMed, Embase, Web of Science, and Cochrane Library databases from inception to December 1, 2022, using the search terms "indocyanine green," "ICG," "infracyanine green," "laparoscopy," "liver resection," and "hepatectomy." After performing a methodological quality assessment of the included studies, the overall results were subjected to meta-analysis using Review Manager 5.3.

RESULTS

After screening, the meta-analysis included a total of 13 articles. The studies included 1,115 patients who were grouped into the fluorescence laparoscopy (490 patients) and conventional laparoscopy (625 patients) groups. All articles included in the meta-analysis were of high quality. The results of the meta-analysis revealed that compared to the conventional laparoscopy group, the fluorescence laparoscopy group had a higher R0 resection rate (odds ratio=4.03, 95% confidence interval [1.50, 10.83], P=0.006), lower blood transfusion rate (odds ratio=0.46, 95% confidence interval [0.21, 0.97], P=0.04) and lower blood loss (mean difference=-36.58; 95% confidence interval [-59.75, -13.41], P=0.002). However, the length of hospital stay, operative time, and incidence of postoperative complications did not differ significantly between both groups (P>0.05).

CONCLUSION

Compared to conventional laparoscopy, fluorescence laparoscopy provides better application effects in hepatectomy. The surgical procedure has demonstrated good safety and feasibility, which make it worthy of popularization.

Meta-analysis of indocyanine green fluorescence imaging-guided laparoscopic hepatectomy

BACKGROUND

This meta-analysis was conducted to systematically evaluate the short-term efficacy and safety of indocyanine green (ICG) fluorescence imaging-guided laparoscopic hepatectomy.

METHODS

A systematic search was conducted of the literature on ICG fluorescence imaging-guided laparoscopic hepatectomy in randomized, semi-randomized controlled trials and observational studies. The found publications and conference papers in English were manually searched and the references included in the literature were traced. The retrieval period was up to February 2021. After evaluating the quality of the included studies, the meta-analysis was conducted using the STATA 15.1 software.

RESULTS

This meta-analysis included 6 studies comprising 417 patients with liver disease. The meta-results showed that compared to the control group, ICG fluorescence imaging-guided laparoscopic hepatectomy can significantly shorten the operative time [weighted mean differences (WMD) = -20.81, 95% CI, -28.02--13.59, p = 0.000], reduce intraoperative bleeding  [WMD = -108.16, 95% CI, -127.88--88.44, p = 0.000], shorten hospital stay  [WMD= -1.23,95% CI, -1.50--0.95, p = 0.000], and reduce the incidence of postoperative complications  [OR = 0.49,95% CI, 0.26-0.91, p = 0.025]. There were no differences in blood transfusion, hilar occlusion time, and surgical margin.

CONCLUSION

The application of ICG fluorescence imaging technology in laparoscopic hepatectomy can effectively reduce the operative time, blood loss, hospital stay and the incidence of postoperative complications. However, more multicenter large-sample randomized controlled trials are needed to further confirm its advantages.

Clinical outcomes of laparoscopic versus open right hepatectomy for liver tumors: A meta-analysis

BACKGROUND

Laparoscopic right hepatectomy (LRH) is one of the most challenging procedures. Right liver resections have been always performed in open procedure and open right hepatectomy (ORH) was initially considered as routine way. Moreover, it is unclear how beneficial the minimally invasive technique is to patients; thus, we conducted a meta-analysis to acquire a more reliable conclusion about the feasibility and safety of LRH compared with ORH.

METHODS

We comprehensively searched the electronic databases of PubMed, Embase, and the Cochrane Library using the key words. Meta-analysis was performed using the Review Manager, with results expressed as odds ratio and weighted mean difference with 95% confidence intervals. The fixed-effect model was selected initially if high heterogeneity was not present between the studies; otherwise, the randomized-effect model was used. Subgroup analysis was performed based on different surgical methods of pure laparoscopic operation or hand-assisted operation.

RESULTS

Seven studies with 467 patients were included. In the overall analysis, less intraoperative blood loss (MD = -155.17; 95% CI, -238.89, -71.45; P = .0003) and a shorter length of stay (MD = -4.45; 95% CI, -5.84, -3.07; P < .00001) were observed in the LRH group compared to the ORH group. There were fewer overall complications (OR = 0.30; 95% CI, 0.10, 0.90; P = 0.03) and severe complications (OR = 0.24; 95% CI, 0.10, 0.58; P = .002;) in the LRH group than in the ORH group. The disadvantage of LRH was the longer operative time (MD = 49.39; 95% CI, 5.33, 93.45; P = .03). No significant difference was observed between the 2 groups in portal occlusion, rate of R0 resection, transfusion rate, mild complications, and postoperative mortality. In the subgroup analysis, intraoperative blood loss was significantly lower in the pure LRH group and hand-assist LRH group compared with ORH group. Length of stay was shorter by use of pure LRH and hand-assisted LRH manners than ORH. The incidence rate of complications was lower in the pure LRH group than in the ORH group. In contrast, there was no significant difference between hand-assisted LRH group and ORH group.

CONCLUSION

Compared to ORH, LRH has short-term surgical advantages and leads to a shorter recovery time in selected patients. We speculate that the operative time of LRH is closer with ORH. Overall, LRH can be considered a feasible choice in routine clinical practice with experienced surgeons, although more evidence is needed to make a definitive conclusion.

Robot-assisted liver surgery in a general surgery unit with a "Referral Centre Hub&Spoke Learning Program". Early outcomes after our first 70 consecutive patients

BACKGROUND

The aim of this study was to evaluate safety, feasibility and short-term outcomes of our first 70 consecutive patients treated by robotic-assisted liver resection after a reversal proctoring between a high HPB volume centre and our well-trained center in minimally invasive General Surgery. Six surgeons were involved in this Hub&Spoke learning program.

METHODS

From September 2012 to December 2016, 70 patients underwent robotic-assisted liver resections (RALR). We treated 18 patients affected by colorectal and gastric cancer with synchronous liver lesions suspected for metastases in a one-stage robotic-assisted procedure. For the first 20 procedures we had a tutor in the operatory room, who was present also in the next most difficult procedures.

RESULTS

The 30- and 90-day mortality rate was zero with an overall morbidity rate of 10.1%. Associated surgical procedures were performed in about 65,7% of patients. The observed conversion rate was 10%. The results of the first 20 cases were similar to the next 50 showing a shortned learning curve.

CONCLUSIONS

Minimally invasive robot-assisted liver resection is a safe technique; it allows overcoming many limits of conventional laparoscopy. This innovative, time-enduring Hub&Spoke may allow patients to undergo a proper standard of care also for complex surgical procedures, without the need of reaching referral centres.

CRITICAL EVALUATION OF LONG-TERM RESULTS OF MALIGNANT HEPATIC TUMORS TREATED BY MEANS CURATIVE LAPAROSCOPIC HEPATECTOMY

BACKGROUND

Laparoscopic hepatectomy has presented great importance for treating malignant hepatic lesions.

AIM

To evaluate its impact in relation to overall survival or disease free of the patients operated due different hepatic malignant tumors.

METHODS

Thirty-four laparoscopic hepatectomies were performed in 31 patients with malignant neoplasm. Patients were distributed as: Group 1 - colorectal metastases (n=14); Group 2 - hepatocellular carcinoma (n=8); and Group 3 - non-colorectal metastases and intrahepatic cholangiocarcinoma (n=9). The conversion rate, morbidity, mortality and tumor recurrence were also evaluated.

RESULTS

Conversion to open surgery was 6%; morbidity 22%; postoperative mortality 3%. There was tumor recurrence in 11 cases. Medians of overall survival and disease free survival were respectively 60 and 46 m; however, there was no difference among studied groups (p>0,05).

CONCLUSION

Long-term outcomes of laparoscopic hepatectomy for treating hepatic malignant tumors are satisfactory. There is no statistical difference in relation of both overall and disease free survival among different groups of hepatic neoplasms.

Totally laparoscopic anatomical liver resection for centrally located tumors: A single center experience

Laparoscopic major hepatectomy is a common procedure that has been reported frequently; however, laparoscopic resection of centrally located tumors involving segments 4, 5, and 8 remains a technically difficult procedure because it requires 2 transection planes and dissection of numerous branches of the hepatic vein and glissonean capsule compared to hemi-hepatectomy. Here, we present 7 cases of totally laparoscopic right anterior sectionectomy (Lap-RAS) and 3 cases of totally laparoscopic central bisectionectomy (Lap-CBS).Between May 2013 and January 2015, 10 totally laparoscopic anatomical resections of centrally located tumors were performed in our institution. The median age of the patients was 54.2 (38-72) years and the median ICG-R15 was 10.4 (3.9-17.4). There were 8 patients with hepatocellular carcinoma (HCC) and 2 with metastatic colorectal cancer. All the HCC patients has the liver function impairment on the degree of Child-Pugh score A.The mean operation time was 330 ± 92.7 minutes with an estimated blood loss of 325 ± 234.5 mL. Only 1 patient required transfusion during surgery. Mean postoperative hospital stay was 9.5 ± 3.4 day and postop complication was reported only 1 case that has the fluid collection at the resection margin of the liver. Mean resection margin was 8.5 ± 6.1 mm and tumor size was 2.9 ± 1.9 cm.Totally lap-RAS and lap-CBS are feasible operative procedures in patients with centrally located tumor of the liver and particularly in patients with limited liver function such as those with cirrhosis.

What is the Learning Curve for Laparoscopic Major Hepatectomy?

BACKGROUND

Laparoscopic liver resection is rapidly expanding with more than 9500 cases performed worldwide. While initial series reported non-anatomic resection of benign peripheral hepatic lesions, approximately 50-65 % of laparoscopic liver resections are now being done for malignant tumors, primarily hepatocellular carcinoma (HCC) or colorectal cancer liver metastases (mCRC).

METHODS

We performed a literature review of published studies evaluating outcomes of major laparoscopic liver resection, defined as three or more Couinaud segments.

RESULTS

Initial fears of adverse oncologic outcomes or tumor seeding have not been demonstrated, and dozens of studies have reported comparable 5-year disease-free and overall survival between laparoscopic and open resection of HCC or mCRC in case-cohort and propensity score-matched analyses. Increased experience has led to laparoscopic anatomic liver resections including laparoscopic major hepatectomy. A steep learning curve of 45-60 cases is evident for laparoscopic hepatic resection.

CONCLUSION

Laparoscopic major hepatectomy is safe and effective in the treatment of benign and malignant liver tumors when performed in specialized centers with dedicated teams. Comparable to other complex laparoscopic surgeries, laparoscopic major hepatectomy has a learning curve of 45-60 cases.

Laparoscopic hepatectomy: indications and results from 18 resectable cases

OBJECTIVE

To evaluate the early and late results from laparoscopic hepatectomy procedures at a tertiary hospital in Brasília (DF), Brazil.

METHODS

The authors report on a series of 18 patients (11 women) who underwent laparoscopic hepatectomy performed by a single surgical team at Santa Lúcia Hospital, in Brasília, between June 2007 and December 2010. Age ranged from 21 to 71 years (median = 43 years). There were eleven women and seven men. Nine patients had benign diseases and nine had malignant lesions. The lesion diameter ranged from 1.8 to 12 cm (mean: 4.96 cm).

RESULTS

Six major hepatectomy procedures and 12 minor hepatectomy procedures were performed. The mean duration of the operation was 205 minutes (range: 90 to 360 minutes). The mean intraoperative blood loss was 300 mL (range: 100 to 1,500 mL). Two patients received a transfusion (11%). There was one conversion to open surgery. There was no death and no patient underwent reoperation. The postoperative morbidity rate was 11% (n = 2). One patient presented with a minor complication (lobar pneumonia) while other presented with two major complications (intraoperative bleeding and incisional hernia). The median length of hospital stay was 4 days (range: 2 to 11 days). The median time to return to normal activities was 13 days (range: 7 to 40 days).

CONCLUSION

Laparoscopic hepatectomy is a safe surgical approach for treating both benign and malignant hepatic lesions. This small series showed no mortality, low morbidity and good cosmetic results.

Laparoscopic versus Open Liver Resection: Differences in Intraoperative and Early Postoperative Outcome among Cirrhotic Patients with Hepatocellular Carcinoma-A Retrospective Observational Study

Introduction. Laparoscopic liver resection is considered risky in cirrhotic patients, even if minor surgical trauma of laparoscopy could be useful to prevent deterioration of a compromised liver function. This study aimed to identify the differences in terms of perioperative complications and early outcome in cirrhotic patients undergoing minor hepatic resection for hepatocellular carcinoma with open or laparoscopic technique. Methods. In this retrospective study, 156 cirrhotic patients undergoing liver resection for hepatocellular carcinoma were divided into two groups according to type of surgical approach: laparoscopy (LS group: 23 patients) or laparotomy (LT group: 133 patients). Perioperative data, mortality, and length of hospital stay were recorded. Results. Groups were matched for type of resection, median number of nodules, and median diameter of largest lesions. Groups were also homogeneous for preoperative liver and renal function tests. Intraoperative haemoglobin decrease and transfusions of red blood cells and fresh frozen plasma were significantly lower in LS group. MELD score lasted stable after laparoscopic resection, while it increased in laparotomic group. Postoperative liver and renal failure and mortality were all lower in LS group. Conclusions. Lower morbidity and mortality, maintenance of liver function, and shorter hospital stay suggest the safety and benefit of laparoscopic approach.

Laparoscopic right hepatectomy: a challenging, but feasible, safe and efficient procedure

BACKGROUND

Few centers are undertaking major laparoscopic liver resections, because of the well-recognized technical difficulties and lack of training opportunities.

METHODS

The authors describe their technique for laparoscopic right hepatectomy, highlighting relevant details for accomplishing a safe and efficient procedure. Patients were chronologically divided into 2 groups to evaluate the impact of increasing experience on the surgical outcomes.

RESULTS

Group I included 17 patients and group II 18 patients. The conversion rate to open or hybrid techniques significantly decreased from 36% in group I to 6% in group II (P = .03). The hospital stay decreased from a median of 6 days in group I to a median of 4 days in group II (P = .05). Complications occurred in 4 patients (11%), of whom 3 were in group I. The mortality was zero.

CONCLUSIONS

Laparoscopic right hepatectomy is a safe and efficient procedure when performed at specialized centers with extensive experience in hepatic surgery. Long-term training is necessary to acquire adequate expertise.

Meta-analysis of trials comparing minimally-invasive and open liver resections for hepatocellular carcinoma

BACKGROUND

Recent literature suggests that minimally-invasive hepatectomy (MIH) for hepatocellular carcinoma (HCC) is associated with better perioperative results and similar oncologic outcomes compared to open hepatectomy (OH). However, previous reports have been limited by small sample size and single-institution design.

METHODS

To overcome these limitations, we performed a meta-analysis of studies comparing MIH and OH in patients with HCC using a random-effects model.

RESULTS

Nine eligible studies were identified that included 227 patients undergoing MIH and 363 undergoing OH. Patients were similar respect to age, gender, rates of cirrhosis, hepatitis C infection, tumour size, and American Society of Anesthesiology classification. The MIH group had lower rates of hepatitis B infection. There were no differences in type of resection (anatomic or non-anatomic), use of Pringle's maneuver, and operative time. Patients undergoing MIH had less blood loss [difference -217 mL; 95% confidence interval (CI), -314 to -121], lower rates of transfusion [odds ratio (OR), 0.38; 95% CI, 0.24 to 0.59], shorter postoperative stay (difference -5 days; 95% CI, -7.84 to -2.25), lower rates of positive margins (OR, 0.30; 95% CI, 0.12 to 0.69) and perioperative complications (OR, 0.45; 95% CI, 0.31 to 0.66). Survival outcomes were similar in the two groups.

CONCLUSIONS

Although patient selection might have influenced some of the observed outcomes, MIH was associated with decreased blood loss, transfusions, rates of positive resection margins, overall and specific morbidity, and hospital stay. Survival outcomes did not differ between MIH and OH, although further studies are needed to evaluate the impact of MIH on long-term results.

Single-centre comparative study of laparoscopic versus open right hepatectomy

BACKGROUND

Expansion of laparoscopic major hepatectomy is still limited mainly due to the well-recognised technical difficulties compared to open surgery, and doubts regarding the oncological efficiency when major resections are required.

METHODS

Patients undergoing open right hepatectomy (ORH) were matched with patients undergoing laparoscopic right hepatectomy (LRH) and compared for perioperative outcomes.

RESULTS

Seventy patients were included: 36 patients underwent LRH and 34 ORH. Operative time was significantly longer for LRH (median, 300 min vs. 180 min for ORH; p < 0.0001). Intensive care unit (median, 2 days for LRH vs. 4 days for ORH; p < 0.0001) and postoperative length of stay (5 days for LRH vs. 9 days for ORH; p < 0.0001) were significantly shorter for LRH. Four laparoscopic cases were converted to open surgery. No significant difference in postoperative complications and mortality was observed between LRH and ORH. Among patients with colorectal carcinoma liver metastases, R0 resection was obtained in 20/21 (95%) cases after LRH, and in 20/25 (80%) after ORH (p = 0.198). Mid-term overall survival did not significantly differ between the laparoscopic and the open group.

CONCLUSIONS

LRH can be a safe, effective, and oncologically efficient alternative to open resection in selected cases. Extensive experience in hepatic and laparoscopic surgery is required.

Laparoscopic hepatectomy: a systematic review, meta-analysis, and power analysis

PURPOSE

A previous meta-analysis study demonstrated that bleeding and the duration of the hospital stay following laparoscopic hepatectomy (Lap) were significantly smaller and shorter, respectively, than for patients undergoing an open approach (Op). The aim of the present study was to re-evaluate perioperative variables and adverse outcomes in patients undergoing Lap versus (vs) Op after 2000.

METHODS

A PubMed and Ovid Medline search identified clinical studies that compared the outcomes of Lap vs Op patients after 2000. A meta-analysis and power analysis were performed.

RESULTS

Operative time was not significantly different between the two approaches (95% confidence interval [CI]: -0.063 to 0.992). Patient bleeding in the Lap group was significantly lower than in the Op group (95% CI: -1.027 to -0.390). Complications with Lap patients were significantly less frequent (95% CI: 0.231-0.642), and the duration of the hospital stay for Lap patients was significantly shorter (95% CI: -0.950 to -0.530) than for Op patients. Only one paper presented 80% power with 0.05 α-errors in all four outcomes, whereas four studies did not have sufficient statistical power.

CONCLUSIONS

The clinical benefits of Lap include a smaller incidence of complications and a shorter duration of hospital stay at the current time. Several studies had too few cases to sufficiently evaluate these factors, although other studies were appropriately analyzed.

Novel 3-D laparoscopic magnetic ultrasound image guidance for lesion targeting

OBJECTIVES

Accurate laparoscopic liver lesion targeting for biopsy or ablation depends on the ability to merge laparoscopic and ultrasound images with proprioceptive instrument positioning, a skill that can be acquired only through extensive experience. The aim of this study was to determine whether using magnetic positional tracking to provide three-dimensional, real-time guidance improves accuracy during laparoscopic needle placement.

METHODS

Magnetic sensors were embedded into a needle and laparoscopic ultrasound transducer. These sensors interrupted the magnetic fields produced by an electromagnetic field generator, allowing for real-time, 3-D guidance on a stereoscopic monitor. Targets measuring 5 mm were embedded 3-5 cm deep in agar and placed inside a laparoscopic trainer box. Two novices (a college student and an intern) and two experts (hepatopancreatobiliary surgeons) targeted the lesions out of the ultrasound plane using either traditional or 3-D guidance.

RESULTS

Each subject targeted 22 lesions, 11 with traditional and 11 with the novel guidance (n= 88). Hit rates of 32% (14/44) and 100% (44/44) were observed with the traditional approach and the 3-D magnetic guidance approach, respectively. The novices were essentially unable to hit the targets using the traditional approach, but did not miss using the novel system. The hit rate of experts improved from 59% (13/22) to 100% (22/22) (P < 0.0001).

CONCLUSIONS

The novel magnetic 3-D laparoscopic ultrasound guidance results in perfect targeting of 5-mm lesions, even by surgical novices.

Gas embolism during laparoscopic liver resection in a pig model: frequency and severity

BACKGROUND

Laparoscopic liver surgery is evolving rapidly. Carbon dioxide embolism is a potential complication. The aim of this work was to study the frequency and severity of gas embolism (GE) during laparoscopic liver lobe resection in a pig model and the resulting cardiovascular and respiratory changes.

METHODS

Fifteen anaesthetized piglets underwent laparoscopic left liver lobe resection. Haemodynamic and respiratory variables were monitored, including systemic and pulmonary arterial pressures, end-tidal CO2, and pulmonary dead space. Online blood gas monitoring and a transoesophageal echocardiography (TOE) were used. GE was graded semi-quantitatively as grade 0 (none), grade 1 (minor), or grade 2 (major), depending on the TOE results.

RESULTS

In 10 of 15 piglets, GE occurred. In total, 33 separate episodes of GE were recorded. All 13 episodes of grade 2 and three of grade 1 were serious enough to cause mainly respiratory, but also haemodynamic effects. Mostly, grade 1 GE caused only minor respiratory or haemodynamic changes. Most variables were affected during grade 2 GE; the most important were Pa(o(2)), Pa(co(2)), end-tidal CO2, Vd/Vt, and mean pulmonary arterial pressure.

CONCLUSIONS

GE occurred frequently during laparoscopic liver resection in this experimental study. Approximately half of the embolisms were serious enough to cause respiratory or haemodynamic disturbances or both. Pending further human studies, a combination of several monitoring techniques, with narrow limits for the alarm settings, will ensure correct interpretation of the complex physiological response to GE and reveal it early enough to alert the anaesthetist and the surgeon to the ongoing problem.