The predictive value of risk indices for cardiac complications in living donor liver transplantation.

BACKGROUND AND AIMS: The American College of Surgeons' National Surgical Quality Improvement Program (NSQIP) risk tool and Revised Cardiac Risk Index (RCRI) are recommended tools for cardiovascular assessment before non-cardiac surgery to predict early postoperative cardiac morbidity and mortality. Their predictive value for postoperative cardiovascular morbidity and mortality after liver transplantation is unknown. We aimed to evaluate the validity of these two risk tools to predict early (30-day) cardiovascular complications and in-hospital all-cause mortality. METHODS: Patients who underwent living donor liver transplantation were retrospectively analyzed. Consecutive 278 adult patients were included and their NSQIP and RCRI scores were calculated. RESULTS: Cardiovascular morbidity occurred in 5 (1.8 %) patients. In-hospital all-cause mortality occurred in 18 (6.4 %) patients. None-of the patients died from cardiac complications. Causes of cardiac morbidity were as follows; acute coronary syndrome in 1 patient, intraoperative cardiac arrest with successful resuscitation in 1 patient, heart failure in 3 patients. Neither the NSQIP nor the RCRI score were associated with cardiovascular morbidity. Only RCRI medium-high score, DM and Nonalcoholic steatohepatitis as transplant indications were associated with in-hospital all-cause mortality (p = 0.001). CONCLUSIONS:  The NSQIP risk calculator and RCRI scores failed to accurately predict the risk of perioperative cardiac complications (Tab. 3, Ref. 30). Text in PDF www.elis.sk.

Management of patients with recurrent hepatocellular carcinoma following living donor liver transplantation: a single center experience.

OBJECTIVE: Tumor recurrence is the most important predictive factor for the survival of patients following liver transplantation for hepatocellular carcinoma (HCC). The management of recurrent HCC remains controversial. In this study, we presented the clinical outcomes of patients with recurrent HCC following living donor liver transplantation. MATERIAL AND METHODS: Of the 109 patients who underwent liver transplantation due to hepatocellular carcinoma, sixteen (14.7%) developed tumor recurrence and were included in the study. We analyzed the management of patients with recurrent tumors and their outcomes. RESULTS: The mean age of patients included in the study was 55.2 ± 7.82 (28-65) years, and 13 patients (81%) were male. The mean follow up and time to recurrence were 25.8 ± 19.2 (5-78) months and 11 ± 9.4 (4-26) months, respectively. Four patients developed recurrence in the liver graft and 12 (75%) developed recurrence in extrahepatic organs. Of these patients, seven had surgical treatment, seven received chemotherapy, and two did not receive any treatment. All four surviving patients received surgical treatment. CONCLUSION: Recurrence of HCC following liver transplantation generally occurs in the first two years and in extrahepatic organs. The most effective treatment for patients with single and isolated recurrent tumors is surgery. However, the long term survival differed according to the type of recurrence, depending on which organs recurrence occurred in and whether recurrence was in single or multiple locations. Therefore, the treatment strategy should be individualized for longer survival. KEYWORDS: The management of HCC, Recurrent HCC, Living donor liver transplantation.

Which incision is better for living-donor right hepatectomy? Midline, J-shaped, or Mercedes.

Incision-related morbidity for donors is a major concern in living-donor right hepatectomy (LDRH). Open approaches use midline, J-shaped, and Mercedes incisions for LDRH. We retrospectively studied 95 consecutive donors who underwent LDRH between January 2009 and November 2010. They underwent midline (n = 32), J-shaped (n = 28), or Mercedes (n = 35) incisions. We studied resection times, perioperative bleeding, postoperative hospital stay, and postoperative pain assessed by the visual analog scale (VAS) and by analgesic requirements as well as laboratory data and complications. Postoperative analgesic requirements and postoperative VAS scores were significantly lower in the midline group (P < .05) upon univariate but not multivariate analyses. The postoperative complications as well as other parameters were similar between the groups. In conclusion, compared with a J-type shaped or not for Mercedes incision, a donor hepatectomy can be satisfactorily performed via a midline incision by experienced surgeons without increased risk.

International collaboration of Turkey in liver transplantation research: a bibliometric analysis.

OBJECTIVES: Scientific publications are valuable markers of scientific activity for countries. We performed a bibliometric study to evaluate the number of publications written by Turkish authors. The aim of this study is to evaluate Turkey's contribution in terms of number of publications included in Science Citation Index Expanded (SCI-E) in the scientific field of liver transplantation compared with other countries. To our knowledge, this is the first bibliometric study in liver transplantation research of Turkey. MATERIALS AND METHODS: ISI Web of Knowledge-Science was used for the analysis. All scientific works published included in SCI-E in English from 1980 to August 10, 2011, were analyzed. A retrospective search was performed using key words "liver transplantation," "hepatic transplantation," "liver transplant," and "hepatic transplant." We further analyzed these results by the "analyze" function of the software in terms of number of papers for each country, type of documentation, number of publications per year, journal, institute, and author. The number of citations to published works was calculated by using the citation function of the same software. We also used the same function of the software to analyze publications from Turkey in the last three decades between 1980 and 1989, 1990 and 1999, and 2000 and 2009 for statistical evaluation. Collected data from the comparison periods were statistically analyzed using the chi-square test. RESULTS: In all, 48,418 publications related to liver transplantation were included in SCI-E in English between 1980 and August 2011. Overall, 675 of those publications were from Turkey (2.05%). There was no publication from Turkey between 1980 and 1989; 37 between 1990 and 1999; and 511 between 2000 and 2009. The rank of Turkey among other countries according to the number of publications was 25th between 1990 and 1999 and improved to 14th between 2000 and 2009. The number of scientific publications in the field of liver transplantation from Turkey among other countries increased during the last three decades. CONCLUSIONS: Turkey showed a significant positive trend in publications in the scientific field of liver transplantation in the last 30 years, and the rank of Turkey among other countries improved in recent decades. Currently, Turkey is one of the top 17 countries in terms of number of scientific publications listed in SCI-E. This can be considered as another indicator for Turkey's progress in the field of liver transplantation.

Cryopreserved aortic quilt plasty for one-step reconstruction of multiple hepatic venous drainage in right lobe living donor liver transplantation.

Hepatic venous outflow should be maintained for the success of living right lobe liver transplantation. In cases when the right hepatic vein is not the dominant venous drainage, the anterior branch of the middle hepatic vein and the accessory hepatic veins should be adequately drained to preserve graft function. One-step reconstruction of the hepatic veins became a preferred technique to create separate outflow for each of the graft's veins. In this report, we have described a quilt plasty technique for 1-step reconstruction of living donor hepatic veins using cadaveric cryopreserved aorta and iliac vein grafts.

Dual left lobe living donor liver transplantation using donors unacceptable for right lobe donation: a case report.

Living donor liver transplantation (LDLT) has become a viable alternative for end-stage liver disease. The shortage of brain-dead donors has led to development of advanced surgical approaches. Dual lobe LDLT has been performed successfully in the recent years. The major indication for this complex procedure has been insufficient graft size from a single donor or insufficient remnant in the donor. We performed a dual left lobe LDLT using 2 donors who were unacceptable for right lobe donation.

Splenic abscess after splenic artery ligation in living donor liver transplantation: a case report.

Although recent developments in living donor liver transplantation (LDLT) yield promising results, a size mismatch between the weights of the graft and the recipient remains a significant problem. Recipients of LDLT may have hyperdynamic splanchnic circulations resulting in graft hyperperfusion and increased portal vein flow leading to small-for-size syndrome. Splenic artery ligation is one of the least invasive measures to prevent occurrence of this syndrome. Despite its potentially devastating consequences, splenic infarction following splenic artery ligation has received little attention to date. Herein we have reported a patient who developed a splenic abscess due to a splenic infarction following splenic artery ligation during LDLT.

A very rare venous anomaly in a living liver donor: left hepatic venous connection to the right atrium.

In humans, three main hepatic veins drain the liver into the inferior vena cava below the diaphragm. This report represents the first living donor liver that had a rare anatomic variation of the left hepatic vein draining directly to the right atrium, which was detected preoperatively by routine investigations of the living donor transplantation. This type of anomaly may present potentially fatal challenges to a donor operation if not detected preoperatively, especially when the left lobe is the choice for explantation.

Does pharmaconutrition with L-arginine and/or alpha-tocopherol improve the gut barrier in bile duct ligated rats?

BACKGROUND/AIM: Nitric oxide supplementation and antioxidant therapy modulate gut barrier function, but the relationships between enhanced nitric oxide production, antioxidant administration, and biliary obstruction remain unclear. We evaluated the role of nitric oxide and alpha-tocopherol supplementation in bile duct ligated rats. METHODS: Fifty male Wistar albino rats underwent sham operation (group I; control animals) or bile duct ligation (groups II, III, IV, and V). The ligation groups received the following regimens: standard pellet diet (group II), pellet diet plus intramuscularly administered alpha-tocopherol (group III), and L-arginine-enriched pellet diet without (group IV) or with (group V) alpha-tocopherol. Nitric oxide, malondialdehyde, and alpha-tocopherol concentrations were assessed at the end of 3 weeks. Liver and intestinal samples were scored histologically. Mesenteric lymph node and liver cultures were assessed for bacterial translocation. RESULTS: The liver malondialdehyde concentration was highest in group III. The nitric oxide content in the liver was higher in groups III and V, as were the blood alpha-tocopherol levels. Bacterial translocation was evident following bile duct ligation, but did not differ among the treatment groups. Intestinal histology revealed that group III had the lowest villus height, that group V had the least villus count, and that group II had the highest mucous cell count. The fibrosis scores were higher in groups IV and V. CONCLUSIONS: An obvious effect of alpha-tocopherol (with or without L-arginine) on the gut barrier could not be demonstrated. Moreover, the L-arginine-enriched diet promoted fibrosis in the liver. Thus, while biliary duct obstruction triggers bacterial translocation, nitric oxide and/or alpha-tocopherol supplementation did not seem to improve the gut barrier in our model.

Effects of somatostatin analogues and vitamin C on bacterial translocation in an experimental intestinal obstruction model of rats.

The passage of viable endogenous bacteria and their products across the intact intestinal mucosal barrier, disseminating to the mesenteric lymph nodes, peritoneal cavity, spleen, liver, and circulation, is defined as bacterial translocation. Intestinal obstruction induces bacterial translocation due to mucosal disruption, motility dysfunction, and increased intestinal volume, leading to bacterial overgrowth. In a rat model of intestinal obstruction, the effects of both high-dose vitamin C (350 microg/kg), an antioxidant agent known to have a cytoprotective effect in ischemia-reperfusion injury, and somatostatin (20 microg/kg), a gastrointestinal antisecretory agent, in preventing bacterial translocation were studied. Both intestinal and liver samples from the rats was observed, and it was found that the rate of bacterial translocation was 100% in the control group, and only 43% for the rats who were given intraperitoneal vitamin C and somatostatin. The difference was statistically significant. In conclusion, we are convinced that vitamin C and somatostatin analogues may have protective effects against bacterial translocation in mechanical bowel obstruction.