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  • Title: Platelet count, antiplatelet therapy and pulmonary embolism--a prospective study in patients with hip surgery.
    Author: Monreal M, Lafoz E, Roca J, Granero X, Soler J, Salazar X, Olazabal A, Bergqvist D.
    Journal: Thromb Haemost; 1995 Mar; 73(3):380-5. PubMed ID: 7667819.
    Abstract:
    Pulmonary embolism (PE) is a serious complication following hip surgery. Trials of antiplatelet thromboprophylaxis indicated a substantial reduction in PE rate, and we prospectively studied the effect of a combination of low-dose heparin and two different antiplatelets. Furthermore, our experience in previous studies suggested that platelet count (PC) levels could be useful to reliably suspect PE at a very early stage, and we prospectively tried to confirm our previous findings. Ours is a prospective study in 459 consecutive patients operated on because of hip fracture (265) or elective hip replacement (194), aimed to determine: 1) whether the benefits of antiplatelets plus heparin on PE outweigh the risks; 2) to assess the clinical usefulness of PC monitoring in these patients, so as to confirm whether PE could be recognized early. It was a prospective, randomized, double-blind study. All patients received unfractioned heparin (7500 IU sc twice daily, starting 2 h before operation). In addition, they received aspirin (200 mg thrice daily, with meals), Triflusal (300 mg thrice daily, with meals), or placebo. Real time B-mode ultrasonography (US) was performed on all patients on the 8-9th day after surgery. Venography was performed in patients with normal US, if clinical symptoms suggested venous thrombosis. Twelve out of the 459 patients (2.6%) had to discontinue prophylaxis, because of major bleeding (6 patients), or gastric intolerance (6 patients). There were no significant differences between groups in either deep vein thrombosis (26 patients (18%) with aspirin, 18 (12%) with Triflusal, 26 (17%) with placebo), or PE development (7 patients (5%) with aspirin, 3 (2%) with Triflusal, 8 (5%) taking placebo).(ABSTRACT TRUNCATED AT 250 WORDS)
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