The prevention of venous thromboembolism in older adults: guidelines.

The rationale for thromboprophylaxis is based on the high prevalence of venous thromboembolism (VTE), a disorder involving deep vein thrombosis (DVT) and pulmonary embolism (PE), among hospitalized patients, the clinically silent nature of VTE in most patients, and the morbidity, cost, and potential mortality associated with unprevented thromboembolism. Both DVT and PE cause few specific symptoms, and the clinical diagnosis is unreliable. Since the first clinical manifestation of VTE may be fatal PE, it is inappropriate to wait for symptoms before treatment. Unrecognized and untreated DVT may also cause the postphlebitic syndrome and predispose patients to subsequent episodes of recurrent VTE. Routine screening for VTE has also not been shown to reduce the incidence of symptomatic VTE or fatal PE. Use of effective methods of prophylaxis is more cost effective and is safer than selective, intensive screening for VTE. This article reviews current recommendations for the prevention of VTE as they apply to older adults. The recommendations discussed are based on the Sixth American College of Chest Physicians Consensus Conference on Antithrombotic Therapy reported in Chest. 2001;119:132S-175S.