Cirrhotics Undergoing General Surgery

Introduction

The incidence of cirrhosis is increasing as alcoholic liver disease overtakes hepatitis as the cause of cirrhosis although it will likely stabilize as Hepatitis C treatment makes its way through the population. However, liver disease continues to have a large impact on morbidity and mortality with a prevalence of approximately 4.5 million people diagnosed with liver disease with an incidence of 1.8% per year and 12.8 deaths per 100,000 people. The cost of treating cirrhosis ranges from $14 million to $2 billion dollars depending on the etiology of the disease. The large cost is driven by multiple hospitalizations, surgical procedures, rehabilitation/nursing home, and other factors.

For surgeons, cirrhotic patients represent an especially high-risk patient population. In the past, many surgeons were hesitant to offer definitive surgeries for symptomatic cholelithiasis, hernias, or cancer surgeries. Historically these patients had a high risk of mortality with competing causes of mortality driven by liver cirrhosis as well as other issues. Hence, it was thought that these patients should only be operated on in emergent cases unless it precluded them from being transplant eligible. For example, Garrison, et al. noted in 1984 that patients who underwent exploratory laparotomy with either a Child B and C had a 31% and 76% mortality, respectively. Furthermore, this was not unique to that group as another group in 1997 showed surgeries like hernia procedures, cholecystectomy, and other procedures had mortality rates of up to 82% for Child C cirrhotics. As general post-surgical care and critical care have improved, contemporary studies show that mortality although decreased still is significant. A prospective study looking at cirrhotic patients who underwent an umbilical hernia for 30 patients had a mortality of 6%. Moreover, a retrospective analysis of a prospectively maintained database from the American College of Surgeons National Surgical Quality Improvement Program revealed that in a series of 390 pts undergoing umbilical hernia repair there was a 5.1% mortality and 13.1% morbidity in comparison to 0.1 and 3.9% on non-cirrhotic patients, respectively.

There are few papers that look at the drivers of morbidity, mortality, and complications among this population and none looking at more than 30 days post-operative re-admissions, morbidity, or mortality. Furthermore, there is no literature on how elective or emergent surgery may facilitate a longer survival so that patients may still be alive and eligible to receive their liver, the ultimate treatment for liver cirrhosis. Hence, the investigator's tertiary center experience was evaluated focusing on pre-operative, intraoperative, and postoperative factors that may explain the drivers of morbidity and mortality in cirrhotics undergoing elective and emergent surgery. The investigators will also study at how many patients after their index procedure survived to receive their liver transplant. Hence, the investigator's surgical, single-center experience at a tertiary hospital with the largest referral center in the area for liver transplant candidates for any cirrhotics requiring surgery either emergent (\<24 hours since admission), urgent (same admission but > 24 hrs), or elective (patient coming from outpatient setting for planned surgery). The investigators hypothesize, that although the risk is high for patients undergoing surgery, it currently is much lower than historically reported, which may make more patients eligible for transplant and prevent complications that may lead to death for the transplant eligible patients, and may reveal associations that can lead to good outcomes in this high-risk population.

Materials and Methods

The investigator's institutional review board approved this study and data were collected in a retrospective fashion. Initially, a query was done looking at all participants with cirrhosis who underwent any procedure done by the principal investigator. After this, a chart review was done looking at all the participants with a diagnosis of cirrhosis via manual chart review. The index procedure, as well as any re-operation done, were included and all performed by the surgeon who is the principal investigator. Furthermore, pre-operative data that was collected included medications used to treat cirrhosis, etiology of cirrhosis, biological Na-MELD/ Child's classification, whether a transjugular intrahepatic portosystemic shunt was performed, the incidence of esophageal varices/ ascites, pre-operative drainage of ascites or placement of a drain as well as cases of refractory ascites.

Furthermore, intraoperative data were obtained from the anesthesia records regarding estimated blood loss, crystalloid/ colloid administered, blood products administered, any episodes of hypotension, and the use of vasopressors. Post-operative data collected included any complications, blood products administered, the use of colloids, and finally the date of discharge. The participants were tracked for over a year and any cases of re-admission were noted from the charts and the causes of re-admission were noted for further analysis.

Data was collected in a de-identified fashion. Comparisons were done via Student T-tests when applicable. Logistic regression was done to identify factors associated with a given outcome including morbidity and mortality with a limit of 3 factors chosen in a univariable model and multivariable model given the low number of cases. Kaplan Meier curves were done to analyze the time to transplant after elective surgery to analyze whether elective surgery may increase the life span of cirrhotics who undergo surgery and stratifying by different risk factors to predict who may need a transplant sooner after elective surgery. Data were analyzed via SPSS 26.0.