Vein graft surveillance: Is graft revision without angiography justified and what criteria should be used?

AbstractPurpose: The objective of this study was to assess the accuracy of color-flow duplex surveillance parameters to detect infrainguinal vein graft stenoses and to investigate whether graft revision without angiography is justified. Methods: In a prospective study in which three centers participated, the data of graft surveillance in 300 patients were analyzed. For the evaluation of surveillance criteria all patients underwent a digital subtraction angiography if a graft stenosis was suspected. To create a control group, in patients with normal grafts a consented digital subtraction angiography was performed also. From these data the accuracy of seven duplex and three ankle blood pressure-derived variables was assessed. The relation between various surveillance criteria and continued graft patency was determined with life table analysis with the transient state method. Results: The mean follow-up period was 20 months (range, 1 to 40 months). At univariate and multivariate analysis the peak systolic velocity (PSV) ratio provided the best correlation with angiographic stenoses ≥70% (PSV ratio cutoff 3.0: sensitivity 80%, specificity 84%). This finding did not differ between the participating centers. With life table methods it was demonstrated that the best combination of efficacy (limitation of the number of unnecessary revisions), safety (minimal number of correctable lesions missed), and reduction of angiograms was obtained by a two-parameter surveillance algorithm. This algorithm included a PSV ratio <2.5 to delineate patients in whom a conservative approach without angiography or revision was appropriate, a PSV ratio ≥4.0 to indicate patients in whom vein graft revision without angiography could be scheduled, and a group with PSV ratios between 2.5 and 4.0 in whom angiography was to be performed to determine clinical management on the basis of the stenosis severity. This algorithm had a positive predictive value of 93% and a negative predictive value of 89%. In addition, it resulted in a reduction of the number of angiograms of 49% compared with a policy of angiographies in all patients with a PSV ratio ≥2.5. Conclusions: The best criterion to identify a failing graft is the PSV ratio. With a two-parameter algorithm for vein graft surveillance, the incidence of unnecessary revisions and of missed high-grade lesions was acceptably low, whereas the number of angiograms was reduced by one half. (J Vasc Surg 1998;27:399-413.

Pancreatic fibrosis correlates with exocrine pancreatic insufficiency after pancreatoduodenectomy

Background: Obstruction of the pancreatic duct can lead to pancreatic fibrosis. We investigated the correlation between the extent of pancreatic fibrosis and the postoperative exocrine and endocrine pancreatic function. Methods: Fifty-five patients who were treated for pancreatic and periampullary carcinoma and 19 patients with chronic pancreatitis were evaluated. Exocrine pancreatic function was evaluated by fecal elastase-1 test, while endocrine pancreatic function was assessed by plasma glucose level. The extent of fibrosis, duct dilation and endocrine tissue loss was examined histopathologically. Results: A strong correlation was found between pancreatic fibrosis and elastase-1 level less than 100 μg/g (p < 0.0001), reflecting severe exocrine pancreatic insufficiency. A strong correlation was found between pancreatic fibrosis and endocrine tissue loss (p < 0.0001). Neither pancreatic fibrosis nor endocrine tissue loss were correlated with the development of postoperative diabetes mellitus. Duct dilation alone was neither correlated with exocrine nor with endocrine function loss. Conclusion: The majority of patients develop severe exocrine pancreatic insufficiency after pancreatoduodenectomy. The extent of exocrine pancreatic insufficiency is strongly correlated with preoperative fibrosis. The loss of endocrine tissue does not correlate with postoperative diabetes mellitus. Preoperative dilation of the pancreatic duct per se does not predict exocrine or endocrine pancreatic insufficiency postoperatively. Copyrigh

Recurrent Inguinal Hernia Treated by Classical Hernioplasty

The treatment of recurrent inguinal hernia by classical hernioplasty, ie, via the anterior approach and using endogenous tissue for repair, was evaluated in 163 patients operated on between 1980 and 1987. One hundred fifteen patients had a first recurrence and 48 had a multiple recurrence; 58% were of the direct type; 30% were of the indirect type; 7% were of the combined type; and 5% were not defined. In 1989 a questionnaire was sent to all patients; those indicating symptoms of recurrence underwent further examination. There was a mean follow-up of 52 months and a total follow-up period of 706 years. Thirty-seven patients had a repeated recurrence with a cumulative recurrence rate of 16%, 21%, and 23%, after 1, 2, and 5 years, respectively. Increase of age and time passed since the last repair reduced the recurrence rate. Increased abdominal pressure, type of anesthesia or surgical technique, and wound hematoma had no effect. It is concluded that the technique of classical hernioplasty as such may be unsuitable for repair of recurrent inguinal hernias.</p

Recurrent Inguinal Hernia Treated by Classical Hernioplasty

The treatment of recurrent inguinal hernia by classical hernioplasty, ie, via the anterior approach and using endogenous tissue for repair, was evaluated in 163 patients operated on between 1980 and 1987. One hundred fifteen patients had a first recurrence and 48 had a multiple recurrence; 58% were of the direct type; 30% were of the indirect type; 7% were of the combined type; and 5% were not defined. In 1989 a questionnaire was sent to all patients; those indicating symptoms of recurrence underwent further examination. There was a mean follow-up of 52 months and a total follow-up period of 706 years. Thirty-seven patients had a repeated recurrence with a cumulative recurrence rate of 16%, 21%, and 23%, after 1, 2, and 5 years, respectively. Increase of age and time passed since the last repair reduced the recurrence rate. Increased abdominal pressure, type of anesthesia or surgical technique, and wound hematoma had no effect. It is concluded that the technique of classical hernioplasty as such may be unsuitable for repair of recurrent inguinal hernias.</p