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  • Title: Treatment of iatrogenic femoral pseudoaneurysms with percutaneous thrombin injection: experience in 54 patients.
    Author: Sheiman RG, Brophy DP.
    Journal: Radiology; 2001 Apr; 219(1):123-7. PubMed ID: 11274546.
    Abstract:
    PURPOSE: To assess the clinical success of ultrasonography (US)-guided thrombin injection for the treatment of iatrogenic femoral pseudoaneurysms and to identify criteria that may predispose to treatment failure. MATERIALS AND METHODS: Fifty-four iatrogenic femoral pseudoaneurysms were treated with US-guided thrombin injection. Forty-five were classified as simple (single lobe) and nine, as complex (at least two lobes and a single neck to the native vessel). Pseudoaneurysm volume, classification, thrombin dose, anticoagulation therapy status, and sheath size were compared between failed and successful cases. Seven- to 10-day follow-up US and a minimum 4-month clinical follow-up were also performed to evaluate success. RESULTS: Fifty of 54 pseudoaneurysms were successfully treated with topical thrombin without complication and included all 45 simple and five of nine complex pseudoaneurysms. US follow-up in all 50 successful cases and clinical follow-up in 37 of these revealed no recurrence. Only a complex pseudoaneurysm classification was significantly associated with failure (P<.01). Among the complex pseudoaneurysms, successful cases involved two injections and a total thrombin dose of at least 1,500 units. In failed cases, pseudoaneurysms were treated with a single injection of 1,000 units, initially thrombosed, and recurred. CONCLUSION: Simple iatrogenic femoral pseudoaneurysms, regardless of size or concomitant anticoagulation therapy, can be treated with a single injection of up to 1,000 units of topical thrombin and require no follow-up. Complex pseudoaneurysms will likely require a second injection (total thrombin dose of at least 1,500 units) and short-term clinical and US follow-up to ensure successful treatment.
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