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The Journal of Bone & Joint Surgery British Volume
Vol. 90-B, Issue 5 | Pages 662 - 667
1 May 2008
Strauss EJ Egol KA Alaia M Hansen D Bashar M Steiger D

This study was undertaken to evaluate the safety and efficacy of retrievable inferior vena cava filters in high-risk orthopaedic patients. A total of 58 patients had a retrievable inferior vena cava filter placed as an adjunct to chemical and mechanical prophylaxis, most commonly for a history of previous deep-vein thrombosis or pulmonary embolism, polytrauma, or expected prolonged immobilisation. In total 56 patients (96.6%) had an uncomplicated post-operative course. Two patients (3.4%) died in the peri-operative period for unrelated reasons.

Of the 56 surviving patients, 50 (89%) were available for follow-up. A total of 32 filters (64%) were removed without complication at a mean of 37.8 days (4 to 238) after placement. There were four filters (8%) which were retained because of thrombosis at the filter site, and four (8%) were retained because of incorporation of the filter into the wall of the inferior vena cava. In ten cases (20%) the retrievable filter was left in place to continue as primary prophylaxis. No patient had post-removal thromboembolic complications.

A retrievable inferior vena cava filter, as an adjunct to chemical and mechanical prophylaxis, was a safe and effective means of reducing the acute risk of pulmonary embolism in this high-risk group of patients. Although most filters were removed without complications, thereby avoiding the long-term complications that have plagued permanent indwelling filters, a relatively high percentage of filters had to be left in situ.


The Journal of Bone & Joint Surgery British Volume
Vol. 67-B, Issue 3 | Pages 470 - 472
1 May 1985
Waisbrod H Panhans C Hansen D Gerbershagen H

Nineteen patients with chronic pain due to a traumatic peripheral neuropathy were treated by means of implanted nerve stimulation. In 11 (58%) pain was completely relieved and in four (21%) it was reduced sufficiently to discontinue analgesics. The average follow-up was 11.5 months. The technique is described and the failures discussed. The necessity for implanting the stimulator proximally is emphasised.