Biomedical subjects
Publications and source records attributed to O Landau.
Aortocaval fistula is a rare phenomenon which has both acute and chronic clinical presentations. Its diagnosis and treatment are difficult and it presents a surgical challenge of the first degree, requiring intensive perioperative care. A patient with an aortocaval fistula is described. It was found during emergency operation for a ruptured abdominal aortic aneurysm.
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In order to evaluate the risk of acute cholecystitis in diabetic patients, we analyzed 2,700 consecutive cholecystectomies, 566 of which were performed in the presence of acute cholecystitis. Of these patients 123 had diabetes mellitus (DM) and 433 had no diabetes (ND). The aim of this study was to establish the comparative risks in the two groups. We found that diabetics are more likely to be operated on in the acute stage of their disease (22% vs. 12%). The DM group had a higher rate of septic bile, gangrenous changes and perforations of the gallbladder wall. The morbidity rate was higher in the DM group (21% vs. 9%), and mortality was slightly higher in the DM group. The degree of additional operative risk does not in our view justify recommending cholecystectomy in diabetic patients with asymptomatic gallstones. Early surgery however, is highly recommended in diabetics with symptomatic gallstones and acute cholecystitis.
Eight patients were treated for ischemic venous thrombosis of the extremities. The patients were evaluated retrospectively concerning their history, clinical signs and symptoms, management and follow-up. Neoplastic disease and immobility were the major etiological factors. Once diagnosed, an urgent combined medical and surgical approach proved to be successful in all patients as far as restoration of blood flow to the limb was concerned.
The problem of long waiting list of patients for varicose vein surgery may be eased by bilateral operation when both limbs are involved and not in two separate operations as is the practice in many surgical centers. We found that patients undergoing unilateral high ligation and stripping did not differ from patients who had bilateral limb operation in terms of complications, morbidity and length of hospitalization. Most of our patients were released after one day of hospitalization. Therefore, we recommend bilateral operation when there is an indication, rather than two unilateral operations.
A unifactorial analysis for possible risk factors was applied to 2,700 consecutive operations for benign disease of the biliary tract. A series of high risk factors in relation to positive bacteriology and septic complication could be identified. These risk factors were patients who were elderly (greater than 70 years; p less than 0.001), those who were diabetic, those who had a serum bilirubin greater than 1.1 mg% (p less than 0.001), those who had acute cholecystitis (p less than 0.001), and those in whom choledochal stones were found (p less than 0.001). Using a multivariate analysis, we concluded that in patients with no risk factors (56.9%) the incidence of a positive bacteriology was low (10.9%) and they should receive no antibiotic prophylaxis. Patients with one risk factor (24%), had a 36% incidence of positive bacteriology and minimal pre-operative prophylaxis is recommended. Patients with two or more risk factors (19.1%) had a 77.6% incidence of positive bacteriology and full peri-operative prophylaxis is recommended, starting pre-operatively and continuing for 3 to 5 days postoperatively. The aim of this study was to identify patients at risk for septic complication in biliary surgery and to create new guidelines for the antibiotic treatment of selected groups.
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The treatment of septic complications of cholecystectomy patients requires special attention. In a prospective study of 1009 consecutive cholecystectomy patients (including all acute and elective patients, excluding cases of malignancy), we routinely took cultures from the cystic duct and the gallbladder, and checked the strain for sensitivity. Positive cultures were found in 31.4% of the series, the most frequent bacteria being E. coli (50.3%). The aminoglycosides and the second and third generations of cephaloridins were found more specific for the strains that were cultured. While the new cephaloridins are the first choice for prophylaxis, the combination of aminoglycosides with ampicillin is to be preferred from the medical and cost effective standpoint while the aim is therapeutic.