Introduction: We tested the efficacy and safety of fixed doses of Low-Molecular Weight Heparin (LMWH) in patients requiring interruption of Vitamin-k Antagonist (VKA) because of invasive procedures Methodology: Pre-operatively, patients discontinued VKA 5 +/- 1days; in those at low-risk for thrombosis, LMWH was given at a prophylactic dosage of 3.800 U.I. (nadroparin) or 4.000 U.I. (enoxaparin) anti-FXa once daily the night before the procedure. In patients at high-risk for thrombosis, LMWH was started early after VKA cessation and given at fixed sub-therapeutic doses (3.800 or 4.000 UI anti-FXa twice daily) until surgery. Post-operatively, LMWH was reinitiated 12 hours after procedure while VKA the day after. Heparin was continued until a therapeutic INR value was reached. The primary efficacy endpoints were the incidence of thromboembolism and major bleeding from VKA suspension (because of surgery) to 30 +/- 2 days post-procedure. Results: A total of 328 patients (55.4% at low-risk and 44.6% at high-risk for thrombosis) were enrolled; 103 (31.4%) underwent major surgery and 225 (68.6%) non major invasive procedures. Overall, thromboembolic events occurred in 6 patients (1.8%, 95% confidence intervals 0.4 to 3.2), 5 belonging to high-risk and 1 to low-risk group. Overall, major bleeding occurred in 7 patients (2.1%, 95 CI 0.6 to 3.6), 6 patients belonged to high-risk and 1 to low-risk group; most of events occurred in high-risk group during major surgery. Conclusion: LMWH given at fixed sub-therapeutic doses appears to be a feasible and safe approach for bridging therapy in chronic anticoagulated patients.

Summary. Introduction: We tested the efficacy and safety of fixed doses of low-molecular-weight heparin (LMWH) in patients requiring interruption of vitamin-K antagonist (VKA) because of invasive procedures. Methodology: Preoperatively, patients discontinued VKA for 5 +/- 1 days; in those at low risk for thrombosis, LMWH was given at a prophylactic dosage of 3800 UI (nadroparin) or 4000 UI (enoxaparin) anti-factor (F) Xa once daily the night before the procedure. In patients at high risk for thrombosis, LMWH was started early after VKA cessation and given at fixed sub-therapeutic doses (3800 or 4000 UI anti-FXa twice daily) until surgery. Postoperatively, LMWH was reinitiated 12 h after procedure while VKA was reinitiated the day after. Heparin was continued until a therapeutic INR value was reached. The primary efficacy endpoints were the incidence of thromboembolism and major bleeding from VKA suspension (because of surgery) up to 30 +/- 2 days postprocedure. Results: A total of 328 patients (55.4% at low risk and 44.6% at high risk for thrombosis) were enrolled; 103 (31.4%) underwent major surgery and 225 (68.6%) non-major invasive procedures. Overall, thromboembolic events occurred in six patients (1.8%, 95% confidence interval 0.4-3.2), five belonging to the high-risk group and one belonging to the low-risk group. Overall, major bleeding occurred in seven patients (2.1%, 95 confidence interval 0.6-3.6), six patients belonged to the high-risk group and one belonged to the low-risk group; most of the events occurred in the high-risk group during major surgery. Conclusion: LMWH given at fixed sub-therapeutic doses appears to be a feasible and safe approach for bridging therapy in chronic anticoagulated patients

Malato, A., Saccullo, G., Lo Coco, L., Caramazza, D., Abbene, I., Pizzo, G., et al. (2010). Patients requiring interruption of long-term oral anticoagulant therapy: the use of fixed sub-therapeutic doses of low-molecular-weight heparin. JOURNAL OF THROMBOSIS AND HAEMOSTASIS, 8(1), 107-113 [10.1111/j.1538-7836.2009.03649.x].

Patients requiring interruption of long-term oral anticoagulant therapy: the use of fixed sub-therapeutic doses of low-molecular-weight heparin

CASUCCIO, Alessandra;SIRAGUSA, Sergio
2010-01-01

Abstract

Summary. Introduction: We tested the efficacy and safety of fixed doses of low-molecular-weight heparin (LMWH) in patients requiring interruption of vitamin-K antagonist (VKA) because of invasive procedures. Methodology: Preoperatively, patients discontinued VKA for 5 +/- 1 days; in those at low risk for thrombosis, LMWH was given at a prophylactic dosage of 3800 UI (nadroparin) or 4000 UI (enoxaparin) anti-factor (F) Xa once daily the night before the procedure. In patients at high risk for thrombosis, LMWH was started early after VKA cessation and given at fixed sub-therapeutic doses (3800 or 4000 UI anti-FXa twice daily) until surgery. Postoperatively, LMWH was reinitiated 12 h after procedure while VKA was reinitiated the day after. Heparin was continued until a therapeutic INR value was reached. The primary efficacy endpoints were the incidence of thromboembolism and major bleeding from VKA suspension (because of surgery) up to 30 +/- 2 days postprocedure. Results: A total of 328 patients (55.4% at low risk and 44.6% at high risk for thrombosis) were enrolled; 103 (31.4%) underwent major surgery and 225 (68.6%) non-major invasive procedures. Overall, thromboembolic events occurred in six patients (1.8%, 95% confidence interval 0.4-3.2), five belonging to the high-risk group and one belonging to the low-risk group. Overall, major bleeding occurred in seven patients (2.1%, 95 confidence interval 0.6-3.6), six patients belonged to the high-risk group and one belonged to the low-risk group; most of the events occurred in the high-risk group during major surgery. Conclusion: LMWH given at fixed sub-therapeutic doses appears to be a feasible and safe approach for bridging therapy in chronic anticoagulated patients
2010
Settore MED/15 - Malattie Del Sangue
Malato, A., Saccullo, G., Lo Coco, L., Caramazza, D., Abbene, I., Pizzo, G., et al. (2010). Patients requiring interruption of long-term oral anticoagulant therapy: the use of fixed sub-therapeutic doses of low-molecular-weight heparin. JOURNAL OF THROMBOSIS AND HAEMOSTASIS, 8(1), 107-113 [10.1111/j.1538-7836.2009.03649.x].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/55592
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