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Heparin-induced thrombocytopenia in newborns: experience at a pediatric hospital and a literature review.
Research and Practice in Thrombosis and Haemostasis 2023 October
BACKGROUND: Heparin-induced thrombocytopenia (HIT) is a rare, difficult-to-diagnose, and potentially serious adverse drug reaction with thrombotic complications. Even though the immune system is still immature during the neonatal period, HIT has been described in newborns with reporting rates ranging from 0% to 2.3%. Therefore, it is important to clarify the risk of HIT in newborns because it can affect the management and monitoring of heparin treatment.
OBJECTIVES: The objectives of the present study were to review the literature and determine the incidence of HIT after cardiac surgery in newborns in our pediatric hospital.
METHODS: We searched the literature from 1992 to 2021 for reports of HIT in newborns. Four raters then analyzed all the literature reports on HIT and classified them as "likely," "uncertain," or "unlikely." We also determined the incidence of HIT among newborns having undergone cardiac surgery in our pediatric hospital.
RESULTS: Eleven population-based studies and 12 case reports on suspected HIT in 17 newborns were reviewed. One study reported HIT in 14 out of 930 (1.5%) heparin-treated newborns, but the other studies ( n = 467 newborns) did not mention HIT at all. None of the cases described in the literature was classified as "likely" by the raters. In our center, none of the 2997 newborns that had undergone cardiac surgery in the previous 16 years was diagnosed with HIT.
CONCLUSION: We conclude that the incidence of HIT in newborns has been overestimated in the literature.
OBJECTIVES: The objectives of the present study were to review the literature and determine the incidence of HIT after cardiac surgery in newborns in our pediatric hospital.
METHODS: We searched the literature from 1992 to 2021 for reports of HIT in newborns. Four raters then analyzed all the literature reports on HIT and classified them as "likely," "uncertain," or "unlikely." We also determined the incidence of HIT among newborns having undergone cardiac surgery in our pediatric hospital.
RESULTS: Eleven population-based studies and 12 case reports on suspected HIT in 17 newborns were reviewed. One study reported HIT in 14 out of 930 (1.5%) heparin-treated newborns, but the other studies ( n = 467 newborns) did not mention HIT at all. None of the cases described in the literature was classified as "likely" by the raters. In our center, none of the 2997 newborns that had undergone cardiac surgery in the previous 16 years was diagnosed with HIT.
CONCLUSION: We conclude that the incidence of HIT in newborns has been overestimated in the literature.
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