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[Retrospective multicenter study of prevention of thromboembolic complications after lumbar disk surgery].

A retrospective study of thromboembolic complications after lumbar disc surgery has been performed. It included 16,656 patients from fifty neurosurgical units, operated on over the year 1989. The average number of operations was 333 +/- 19.5 in each unit, their average duration 55.2 +/- 20 minutes, and the hospital care 6.2 +/- 1.7 days. Surgery was performed using the genupectoral position in 64% of the cases, the supine position in 28%, and the lateral position in 8%. Two groups of patients have been individualized: a first group of patients with no preventive antithrombic treatment (46% of the units) including 10,351 patients, a second group (54% of the units) including 6,305 patients and receiving a systematic treatment with low molecular weight heparin (4,304 patients) or calciparin (1,001 patients) or antiplatelet agents or pentosane polysulfate (1,000 patients). 0.63% of the patients (105) had a thromboembolic accident: 0.65% in the first group (68 cases) and 0.58% in the second (37 cases). No statistically significant difference was noticed between the two groups concerning pulmonary embolism and/or lower-limb thrombophlebitis. Nevertheless, a prospective randomized study would be usefull to corroborate this first data.