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Heparin-Induced Thrombocytopenia in Healthy Individuals with Continuous Heparin Infusion

The risk for developing heparin-induced thrombocytopenia in healthy individuals is thought to be low, but monitoring recommendations remain controversial. Therefore, a retrospective cohort study was conducted to identify the incidence of thrombocytopenic events in a healthy research population expos...

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Detalles Bibliográficos
Autores principales: Williams, Jonathan S., Autori, Paula J., Kidd, Stephen K., Piazza, Gregory, Connors, Molly C., Czeisler, Charles A., Scheuermaier, Karine D., Duffy, Jeanne, Klerman, Elizabeth B., Scheer, Frank A., Kozak, Marjorie, Driscoll, Sheila M., Goldhaber, Samuel Z.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Georg Thieme Verlag KG 2018
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6524859/
https://www.ncbi.nlm.nih.gov/pubmed/31249929
http://dx.doi.org/10.1055/s-0038-1624565
Descripción
Sumario:The risk for developing heparin-induced thrombocytopenia in healthy individuals is thought to be low, but monitoring recommendations remain controversial. Therefore, a retrospective cohort study was conducted to identify the incidence of thrombocytopenic events in a healthy research population exposed and re-exposed to continuous intravenous (IV) unfractionated heparin. The Division of Sleep Medicine and the Centre for Clinical Investigations at Brigham and Women's Hospital, Boston, Massachusetts, United States, instituted a standardized platelet monitoring procedure for all research protocols that involved heparin to detect platelet count decreases. Protocol-related frequent blood sampling required use of continuous IV unfractionated heparin infusion (5,000 unit/L in 0.45% saline at 40 mL/h) to maintain line patency over extended periods of IV access. From the years 2009 to 2012, a total of 273 healthy volunteers enrolled in Sleep Medicine research protocols met study criteria as having been exposed and/or re-exposed to continuously infused intravenous heparin for at least 4 hours. The mean continuous heparin exposure time was 88 ± 82 SD hours with a total of 397 heparin exposure and re-exposure events. Platelet count measurements were obtained on 629 occasions, representing a range from 2 to 9 draws per participant. No platelet count decrease of more than 50% was detected. There were no detected adverse bleeding or thrombotic events. In this retrospective study of healthy volunteers involved in a rigorously applied inpatient platelet monitoring protocol, heparin exposure and re-exposure did not lower platelet concentration and, therefore, does not appear to be associated with increased risk of HIT in this population.