Left iliac venous thrombosis caused by venous spur: treatment with thrombectomy and stent implantation.

PURPOSE

To determine the frequency of iliac venous spurs in left iliofemoral venous thrombosis and to report the results of interventional management of venous spurs after transfemoral venous thrombectomy.

METHODS

From 1990 through 1996, 77 patients with acute iliac venous thrombosis (61 left and 16 right) underwent surgical treatment. Patients with malignant disease were excluded from this series. All patients had transfemoral venous thrombectomy with construction of an inguinal arteriovenous fistula and perioperative anticoagulation with heparin with a switch to warfarin sodium for at least 12 postoperative months. Immediate results of thrombectomy were documented by means of intraoperative completion venography. Arteriovenous fistulas were ligated 3 months after control arteriovenography. Since 1995 venous spurs eventually detected during thrombectomy were treated immediately by means of stent implantation.

RESULTS

Among 61 patients with left-sided thrombosis, intraoperative phlebography revealed common iliac venous obstruction suggestive of venous spurs in 30 patients (49%). In 16 of 22 patients (73%) with untreated spurs, postoperative rethrombosis of the iliac vein was documented despite adequate anticoagulation. Only one of eight patients (13%) with stented spurs had reocclusion (chi2 test P < .01).

CONCLUSION

Venous spurs are found among about half of patients with left-sided iliac venous thrombosis. As long as the underlying venous pathologic process is left untreated, thrombectomy will not restore patency. Stent implantation is a simple and safe means to correct central venous strictures and provides excellent long-term results.