• Irish medical journal · Apr 1999

    Unfractionated heparin, time for a change?

    • P F Ridgway, J Crosbie, K A Hinedi, W Ghadban, A Kelly, R O'Donnell, and J Hollingsworth.
    • Dept. of Medicine, Beaumont Hospital, Dublin, Ireland.
    • Ir Med J. 1999 Apr 1; 92 (3): 302-6.

    BackgroundIn Ireland physician transfer to utilisation of Low Molecular Weight Heparin for Venous Thromboembolism has been slow, despite evidence of efficacy and concern about the level of anticoagulation achieved with Unfractionated Heparin.ObjectiveTo examine the effectiveness of Unfractionated Heparin administration in a teaching hospital in Ireland. Primary outcomes measured were time to therapeutic APTT and length of hospital stay.MethodsWe identified 50 consecutive eligible patients treated with continuous intravenous unfractionated heparin for Venous Thromboembolism from the period August 1994 to December 1996 at Beaumont Hospital, Dublin, Ireland. Data analysed included length of hospital stay, costing data and anticoagulation parameters (time to therapeutic APTT, percentage of time within therapeutic range, number of diagnostic tests, heparin dosages).ResultsA significant number of patients (22%) never achieved therapeutic APTT levels. Of those who did achieve therapeutic APTT levels at some time during their therapy, therapeutic range APTT was maintained only 28% of the time on heparin. 57% of the time results were below therapeutic while 15% of the time results were above therapeutic. Also 26% of the patients were discharged with INR results outside the therapeutic range despite an average length of stay of 13.3 days (over twice the ideal of 6 days). Ineffective anticoagulation influenced hospital length of stay in 60% of cases in our evaluation. Average cost of treatment with Unfractionated Heparin was 5897.86 Pounds versus the projected cost of Low Molecular Weight Heparin at 2562.78 Pounds for 6 days of in-patient therapy or 60.78 Pounds for outpatient therapy (excluding physician visit costs).ConclusionsUnfractionated Heparin therapy as reviewed in our study is sub-optimal with inadequate anti coagulation and prolonged hospitalisation. Low Molecular Weight heparin, with comparable therapeutic effect documented elsewhere, overall may cost less.

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