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ROTEM analyses of l...
ROTEM analyses of low molecular weight heparin effects with vitro induced thrombocythopenia
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- Kander, Thomas (författare)
- Lund University,Lunds universitet,Anestesiologi och intensivvård,Sektion II,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Klinisk forskning inom anestesi och intensivvårdsmedicin,Forskargrupper vid Lunds universitet,Anesthesiology and Intensive Care,Section II,Department of Clinical Sciences, Lund,Faculty of Medicine,Clinical Research in Anaesthesia and Intensive Care Medicine,Lund University Research Groups,Skåne University Hospital
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- Schött, Ulf (författare)
- Lund University,Lunds universitet,Anestesiologi och intensivvård,Sektion II,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Klinisk forskning inom anestesi och intensivvårdsmedicin,Forskargrupper vid Lunds universitet,Anesthesiology and Intensive Care,Section II,Department of Clinical Sciences, Lund,Faculty of Medicine,Clinical Research in Anaesthesia and Intensive Care Medicine,Lund University Research Groups,Skåne University Hospital
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(creator_code:org_t)
- 2021
- 2021
- Engelska.
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Ingår i: Women Health Care and Issues. - 2642-9756. ; 4:1, s. 1-9
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Abstract
Ämnesord
Stäng
- Background: Thrombocytopenia is correlated to hemorrhagic complications in patients with low molecular weight heparin (LMWH) thromboprophylaxis. Aims: The aims of our study were to investigate an experimentally induced in vitro thrombocytopenia and then adding 2 types of LMWHs in vitro. Our hypothesis was that a platelet depleted whole blood sample could reflect a stronger synergistic anticoagulative effect of in vitro added LMWH than in the non-manipulated blood. Method: Two venous citrated blood samples were consecutively drawn from 8 patient’s gynaecologic cancer and normal routine coagulation laboratory analyses immediately preopewratively. One of the two samples had its buffy coat pipetted away into a separate tube. Half of the buffy coat was returned to the same sample (treated sample). 3x500 μl of blood from the non-treated sample was added to 3 separate microtubes and corresponding for the treated sample. Thromboprophylactic doses corresponding to an in vivo peak effect 0.5 anti-Xa international units/ml of tinzaparin and enoxaparin were added both to untreated and treated samples – 2 microtubes were unheparinized (treated/untreatedsample).All samples were analysed with rotational thromboelastometry (ROTEM). Results: Wilcoxon matched-pairs signed rank tests of the in-group differences between non-non-treated and treated samples showed no significant differences (p≤0.05) for any of the parameters analysed with the ROTEM-INTEM reagent regardless of heparinization or not. Calculation of non-parametric spearman correlation for clotting time (CT) vs. platelet count (PLC) were not significant for any group. Tinzaparin was clearly observed to prolong CT in the buffy-coat lowered blood from two patients. Conclusions: Our results corroborate previous research that ROTEM cannot detect anticoagulative effects of low dose LMWH in patients with normal PLC. In two patients there was a clear prolongation of clot initiation after tinzaparin that warrants further studies on a more developed in vitro induced thrombocytopenia model.Keywords: thrombocytopenia; thromboprohylaxis; cancer; thromboelastography; low molecular weight heparin
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Hematologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Hematology (hsv//eng)
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