PMID- 38367099 OWN - NLM STAT- Publisher LR - 20240217 IS - 1619-0904 (Electronic) IS - 1434-7229 (Linking) DP - 2024 Feb 17 TI - Contributing factors to heparin resistance during cardiopulmonary bypass. LID - 10.1007/s10047-024-01435-1 [doi] AB - Since the risk factors for heparin resistance (HR) before cardiopulmonary bypass (CPB) have not been fully clarified, this study investigated the contributing factors for HR after the initial unfractionated heparin (UFH) dose of 500 IU/kg. We retrospectively analyzed the data of 371 patients who underwent CPB surgery, with the initial UFH dose of 500 IU/kg, between May 2017 and December 2021. We defined HR as the failure to achieve activated clotting time (ACT) of > 480 s after the initial UFH dose of 500 IU/kg. HR was observed in 36 patients (9.7%) (HR group), while HR was not observed in 335 patients (control group). The HR group included significantly more patients with preoperative use of UFH, with significantly higher white blood cell counts, fibrinogen, fibrinogen degradation products, D-dimer, and C-reactive protein, and lower hemoglobin and albumin. The multivariable logistic regression analysis identified albumin (OR: 3.09, 95% CI 1.3504-7.0845, p = 0.0075) and fibrinogen (OR: 0.99, 95% CI 0.9869-0.9963, p = 0.0003) as independent predictors for HR. Using the Youden index, the cutoffs of albumin and fibrinogen were calculated as 3.8 g/dL and 303 mg/dL, respectively. The receiver operating characteristic curves showed the predictive performance of albumin (area under the curve (AUC): 0.78, sensitivity: 65%, specificity: 81%) and fibrinogen (AUC: 0.77, sensitivity: 56%, specificity: 88%). The incidence of HR after the initial UFH dose of 500 IU/kg was 9.7%. The preoperative albumin < 3.8 g/dL and fibrinogen > 303 mg/dL were independent predictors for HR. CI - (c) 2024. The Japanese Society for Artificial Organs. FAU - Yamashiro, Tomoaki AU - Yamashiro T AD - Department of Clinical Engineering, Fujita Health University Hospital, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan. tyama@fujita-hu.ac.jp. FAU - Takami, Yoshiyuki AU - Takami Y AUID- ORCID: 0000-0002-4623-6233 AD - Department of Cardiovascular Surgery, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan. mytakami@fujita-hu.ac.jp. FAU - Takagi, Yasushi AU - Takagi Y AD - Department of Cardiovascular Surgery, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan. LA - eng PT - Journal Article DEP - 20240217 PL - Japan TA - J Artif Organs JT - Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs JID - 9815648 SB - IM OTO - NOTNLM OT - Activated clotting time OT - Cardiopulmonary bypass OT - Heparin resistance OT - Unfractionated heparin EDAT- 2024/02/17 21:42 MHDA- 2024/02/17 21:42 CRDT- 2024/02/17 11:06 PHST- 2023/12/02 00:00 [received] PHST- 2024/01/18 00:00 [accepted] PHST- 2024/02/17 21:42 [medline] PHST- 2024/02/17 21:42 [pubmed] PHST- 2024/02/17 11:06 [entrez] AID - 10.1007/s10047-024-01435-1 [pii] AID - 10.1007/s10047-024-01435-1 [doi] PST - aheadofprint SO - J Artif Organs. 2024 Feb 17. doi: 10.1007/s10047-024-01435-1.