Intravenous Dabigatran for Anticoagulation during Cardiopulmonary Bypass in a Sheep Model

BACKGROUND: Heparin is the standard anticoagulant used during cardiopulmonary bypass (CPB). However, there are problems with heparin, including immunogenicity and variability of effect, that make a search for an alternative desirable. Dabigatran anticoagulation has been reported to provide adequate conditions for CPB in a rabbit model. This study used a sheep model of CPB to assess the efficacy of dabigatran and its reversibility with idarucizumab. METHODS: Twelve sheep were subjected to 120 min of CPB after anticoagulation with either intravenous dabigatran or heparin (N = 6 per group). In both groups, activated clotting time, kaolin/tissue factor-activated thromboelastography reaction time, and blood gases were monitored during and after CPB. Plasma dabigatran concentrations were measured during and after CPB. After CPB, two sections of each arterial filter were examined for thrombus using electron microscopy. Idarucizumab or protamine was administered after CPB to reverse anticoagulation, and the sheep were monitored for a subsequent 24 h. Plasma concentrations of inflammatory and coagulation markers were assessed at baseline, after 120 min of CPB, and 6 h after reversal administration. RESULTS: After 120 min of CPB, there was no visible thrombus or fibrin observed on the arterial line filters in either the dabigatran or heparin groups. Plasma dabigatran concentrations during CPB were below the target concentration (5 µg/ml), ranging from 1.7 ± 0.4 to 3.4 ± 1.5 µg/ml. In both groups, reaction time and activated clotting time values increased during CPB and then returned to nearly baseline levels after administration of the reversal agents. Interleukin-6 concentrations were elevated in the heparin group compared to the dabigatran group. Five sheep survived 24 h after idarucizumab administration. Four of six sheep survived 24 h after the administration of protamine. CONCLUSIONS: This study demonstrates that dabigatran effectively provides anticoagulation in a sheep CPB model, and idarucizumab successfully reverses its effects.

Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.

Heparin is the standard anticoagulant used during cardiopulmonary bypass (CPB).

Leech-derived molecules this paper discusses, each with a full profile in the ASH compound registry:

Узнайте, как это исследование связано с клинической практикой

More peer-reviewed studies in Геномика и протеомика.

• 434 Salivary Proteins — Integrated Proteomics of Hirudo medicinalis — Liu et al. (2019)
• Medicinal Leech Genome Assembly — Anticoagulant Gene Catalog — Kvist et al. (2020)
• Effects of hirudotherapy on liver functions, lipid profile, and insulin sensitivity in rats with metabolic syndrome — Bilden A et al. (2026)
• Efficacy and Safety of Hirudotherapy for Improving Sperm Quality Parameters in Male Infertility: A Randomized Controlled Trial — Abtahi-Forooshani M et al. (2026)
• Hirudotherapy in Wound Healing — Nair H et al. (2022)
• [Medicinal leeches and hirudotherapy] — Gödekmerdan A et al. (2011)
• [Cutaneous pseudolymphoma after hirudotherapy : Case report and review] — Hanner S et al. (2022)
• HIRUDOTHERAPY IN PRESBYACUZIS PRAECOX IN CLEAN-UP WORKERS AFTER THE CHORNOBYL ACCIDENT DURING THE POST-CATASTROPHE YEARS — Zabolotnyi D, Mishchanchuk N (2019)
• Hirudotherapy (medicinal leeches) for treatment of upper airway obstruction in a dog — Trenholme H, Masseau I, Reinero C (2021)
• Leech therapy — Yantis M, O'Toole K, Ring P (2009)

Browse all ASH-analysed research →