Pyogenic liver abscess: an audit of 10 years' experience and analysis of risk factors

BACKGROUND/AIMS

Despite continuous improvement in image modalities, availability of potent antibiotics and advancement in the knowledge and treatment of pyogenic liver abscess, mortality remains high. The high mortality rate has underlined the important role of prognostic factors and prompts a number of studies to identify the risk factors. The present study aims to audit our experience in managing patients with pyogenic hepatic abscess during the period of 1989-1999, and to document changes in etiology, bacteriology and outcome, and to identify any risk factor associated with mortality.

METHODS

One hundred and thirty-three patients with pyogenic hepatic abscess were studied to determine the demographic characteristics, clinical features, laboratory, bacteriological findings, methods of treatment, final outcome and risk factor analysis. All patients were treated with parenteral antibiotics. One hundred and twelve patients were subjected to ultrasound-guided percutaneous aspiration of the abscess. A percutaneous drainage catheter was inserted after aspiration in all patients. Laparotomy was done in 21 patients.

RESULTS

The overall hospital mortality rate was 6% (8/133). Biliary tract disease was the most frequently identified cause. Leukocytosis, hypoalbuminemia and hyperbilirubinemia were common laboratory findings. The most common microorganism cultured was Klebsiella pneumoniae. The most common concomitant disease was diabetes mellitus. On univariate analysis, large abscess, diabetes mellitus and sepsis were significantly associated with hospital mortality. On multivariate logistic regression analysis, the presence of sepsis (p = 0.0031) was found to be an independent risk factor.

CONCLUSIONS

In addition to early diagnosis and prompt treatment, making every effort to treat patients with adverse prognostic factors and systemic complications, the hospital mortality rate will be decreased significantly.

Ultrasound-guided percutaneous cholecystostomy as an initial treatment for acute cholecystitis in elderly patients

BACKGROUND/AIMS

Acute cholecystitis may atypically present itself in the elderly, thus causing diagnostic and therapeutic problems, and it is well recognized as a high-risk condition for morbidity. The outcome has been attributed to the presence of severe co-morbid disease. In an attempt to minimize the postoperative morbidity and mortality, we performed ultrasound-guided percutaneous transhepatic cholecystostomy (PC) on elderly patients with acute cholecystitis for both initial treatment and subsequent diagnosis of their biliary tract disorders.

METHODS

Those being more than 70 years old, had acute episode of cholecystitis for more than 48 h and still had positive Murphy's signs and distended gallbladders were candidates for ultrasound-guided PC.

RESULTS

Forty-two elderly patients underwent ultrasound-guided PC. Once the condition of each patient showed signs of improvement and stability, cholangiography was performed via PC tube. The results of the cholangiography showed 20 patients with gallbladder stones, 16 with common bile duct stones and 6 with acalculous cholecystitis. Once stable enough, 32 patients underwent definite surgery, 18 having cholecystectomies, 14 having cholecystectomies and choledocholithotomies. The 6 patients with acalculous cholecystitis had the PC tube removed 3 weeks later, without further surgery. Two patients had gallbladder stones removed by choledochofiberscope. Two patients had common bile duct stone removed by endoscopic sphincteroplasty. Although postoperative complications occurred in 5 patients (11.9%), no instance of operative mortality was found.

CONCLUSION

Our findings lead us to conclude that the use of PC in the early treatment of acute cholecystitis in elderly patients can decrease postoperative morbidity and mortality.

Pancreatic pseudocyst involving the spleen

The pseudocyst of the pancreas is a frequent complication of acute pancreatitis. The splenic involvement from the pancreatic pseudocyst is an uncommon entity. A 40-year-old man, who had a five-year history of alcohol consumption, was referred to our hospital for treatment of throbbing pain over left upper quadrant (LUQ) of the abdomen. Except for LUQ tenderness, physical examination was essentially normal. MRI showed two cystic lesions in splenic hilum and pancreatic tail, and prominent vessels in left infrasplenic area and gastrosplenic ligament. Angiography revealed splenic vein thrombosis. Because of persistent LUQ pain, he underwent laparotomy. During the operation, we found the cysts in pancreatic tail and splenic hilum. The cystic content was aspirated to check amylase, which showed the level of amylase being as high as 20,000 IU/L. The diagnosis of a pancreatic pseudocyst involving the spleen was established. Splenectomy and distal pancreatectomy were performed to remove both cysts. The pathologic examination of the resected spleen showed splenic infarction with cyst formation and pancreatic pseudocyst. The patient recovered uneventfully after operation.

Ultrasound-guided percutaneous transhepatic drainage of gallbladder followed by cholecystectomy for acute cholecystitis--10 years' experience

Acute cholecystitis is a common disease which may carry the risk of complications, including empyema, perforation, abscess, peritonitis and sepsis. Percutaneous transhepatic drainage of the gallbladder (PTGBD) with antibiotics can provide prompt decompression of gallbladder in acute cholecystitis and interrupt the natural history of the disease effectively. From July 1986 to June 1996, 154 patients with acute cholecystitis were reviewed retrospectively in Kaohsiung Medical College Hospital. The chief symptoms and signs were pain (98.1%), fever (57.1%) and jaundice (37.7%). WBC count more than 10,000 was noted in 116 (75.3%) patients. Associated diseases included empyema: 42 (27.3%), septic shock: 14 (9.1%), diabetes mellitus: 13 (8.4%), pancreatitis: 10 (6.5%), perforation: 7 (4.5%), liver cirrhosis: 6 (3.9%) and respiratory failure: 1 (0.6%). All of them underwent ultrasound-guided PTGBD immediately after the diagnosis was established. The symptoms and signs disappeared soon after this procedure. Bacterial culture was found positive in 104 (67.5%) of 154 patients in which Escherichia coli (51.9%) was the most common organism, followed by Klebsiella pneumonia (20.2%). After acute stage, 138 patients obtained the cholangiography via PTGBD tube. Gallbladder stones were only noted in 56 (40.6%) patients, gallbladder stone concomitant with common bile duct stone in 26 (18.8%), cystic duct obstruction in 25 (18.1%), acalculous cholecystitis in 21 (15.2%), gallbladder perforation in 1 (0.7%), choledochocyst in 1 (0.7%), and cholecystocolonic fistula in 1 (0.7%). There were 135 patients to undergo surgery after the clinical condition was stable. The operative findings included gallbladder stones only in 88 (65.2%), gallbladder stone concomitant with common bile duct stone in 34 (25.2%), acalculous cholecystitis in 13 (9.6%), choledochocyst in 1 (0.7%), and cholecysto-colonic fistula in 1 (0.7%). The postoperative complications included wound infection 8 (5.9%), UGI bleeding 3 (2.2%), acute renal failure 1 (0.7%) and acute respiratory failure 1 (0.7%). The postoperative mortality rate was 0.7% (1/135), which was much lower than those of previous reports, which not undergoing PTGBD initially. It led us to conclude that PTGBD, as an initial preoperative modality to treat acute cholecystitis, is effective in decreasing postoperative morbidity and mortality.

Suppression of humoral immune responses in mice by antigens derived from Trichomonas vaginalis

The occurrence of immunosuppression in mice inoculated with antigens prepared from Trichomonas vaginalis was investigated in this study. One hundred and fourteen BALB/c mice with half of each sex were divided into 19 groups and inoculated with different antigen preparations before or after sheep red blood cell (Srbc) immunization. Antigen preparations included live T. vaginalis (LTV), excretory and secretory products (ESP), and freeze and thaw antigens (FTA). The immunosuppressive effects of these T. vaginalis-derived antigens were demonstrated by the decrease of hemagglutination titers to Srbc. Results indicated that all three antigen preparations exhibited immunodepressive potentials in the primary and secondary responses to Srbc. Among them, FTA showed the highest inhibitory effect. The duration of the effect persisted for 21 days. The immunosuppressive effect was not observed for antigens which were given after Srbc injection.

Chemical and immunological characterization of a basement membrane-like glycoprotein in the rat

Images