Abstract
Purposes of this study were to compare tibial intraosseous (TIO) and intravenous (IV) administration of vasopressin relative to return of spontaneous circulation (ROSC) and time to ROSC in an adult swine cardiac arrest model. In addition, the purposes were to compare the concentration maximum (Cmax), time to maximum concentration (Tmax), and odds of ROSC. This was a between-subjects, prospective experimental study. Yorkshire swine (N = 21) were randomly assigned to 1 of 3 groups: TIO, IV, or control groups. The swine were anesthetized and instrumented, and then cardiac arrest was induced and sustained for 2 minutes. Cardiopulmonary resuscitation was initiated and continued for 2 minutes. Vasopressin was then administered via the TIO or IV route. Blood samples were collected for 4 minutes to determine the Cmax and Tmax of vasopressin. Concentration maximum and Tmax were calculated by use of liquid chromatography with mass spectrometry. There was no difference in ROSC between the TIO and IV groups (P = .63). The Cmax of vasopressin was significantly higher in the IV group compared to the TIO group (P = .017). However, there was no significant difference in ROSC, time to ROSC, or Tmax between groups (P > .05). All subjects had ROS...Continue Reading
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