Issue |
J Extra Corpor Technol
Volume 28, Number 2, June 1996
|
|
---|---|---|
Page(s) | 67 - 70 | |
DOI | https://doi.org/10.1051/ject/199628267 | |
Published online | 18 August 2023 |
Original Article
Comparison of Three Methods to Estimate Heparin Loading Dose for Cardiopulmonary Bypass
Medical University of South Carolina, Program in Extracorporeal Circulation Technology, Charleston, South Carolina
* Address correspondence to: Jodie M. Ecklund, BS, CCP Program in Extracorporeal Circulation Technology 101 Doughty St., 2nd Floor Charleston, SC 29401
Three available methods used to determine heparin loading dose were studied to determine the most reliable method for reaching a target pre-bypass activated clotting time (ACT) of 510 seconds. One hundred and seven patients were randomly assigned to one of three treatment methods: A) 300 units/kg; B) Hemostasis Management System (HMS); C) RX/DX. Five different lots of heparin were assigned to Groups A and B, and Group C had one heparin lot. Different lots were used to account for possible variations in heparin activity.
Post-skin incision ACTs, post-heparin pre-bypass ACTs, and heparin loading doses were compared. The mean and standard deviation of the post-heparin pre-bypass ACTs were used to determine which method was most reliable to obtain a desired ACT.
There was no statistical difference between different heparin lots. There was no difference in the post-heparin ACTs for the three methods (A:487±135 vs. B:474±105 vs. C:474±111 sec). There was a statistically significant difference between the standard deviation for the HMS and 300 u/kg standard deviations (p<0.05). The HMS has the smallest deviation which makes it the most reliable predictor of heparin loading doses to reach a target ACT for cardiopulmonary bypass.
Key words: cardiopulmonary bypass / activated clotting time / heparin loading dose / RX/DX / HMS
© 1996 AMSECT
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