The 125I-labelled fibrinogen uptake test in elective hip surgery.

The value of the 125I-labelled fibrinogen uptake test as a screening method for deep vein thrombosis was estimated in 49 patients (97 extremities) undergoing elective hip operations. The legs were monitored preoperatively, on the 1st, 2nd and 4th postoperative days. Contrast venography, as a reference method, was performed on the 5th postoperative day. The sensitivity was 73%, specificity 85%, positive predictive value 63%, negative predictive value 86% and correlation coefficient 55%. 78% of fibrinogen uptakes appeared within the first 24 hours, and 6% on the 4th postoperative day. Only 1 of 3 patients with a positive fibrinogen uptake test in the femoral region had roentgenologic evidence of deep vein thrombosis. According to these results the isotope-labelled fibrinogen uptake test can also be utilized as a screening method in elective hip surgery.