Abstract 95: A Sternal Accelerometer Does Not Impair Hemodynamics During Piglet CPR
Background: Previous studies suggest that cardiopulmonary resuscitation (CPR) hemodynamics can be adversely affected by sternal CPR pressure transducers, presumably because of inadequate chest recoil or other effects on manual CPR performance. Such devices can be very helpful for monitoring and directing CPR performance.
Aim To determine the effect of a 260g sternal accelerometer/force-measurement device on CPR hemodynamics with manual compressions.
Methods: 10 piglets (10.8±1.9 kg) were anesthetized with isoflurane and instrumented with micromanometer-tipped catheters in the right atrium and aorta. Left ventricular myocardial blood flow (MBF) and cardiac index (CI) were determined by fluorescent, color-microsphere technique. After electrical induction of ventricular fibrillation, four 3-minute epochs of manual metronome-guided chest compressions at a rate of 100/minute were randomly performed with or without the sternal device (D or noD). Aortic systolic pressure (AoS) was targeted at 80 –90 mmHg. Statistics: t-test, p<0.05 considered as statistically significant.
Results: Baseline normal sinus rhythm (NSR) CI was 3.1 L/min/m2 and MBF was 0.63 L/g. Hemodynamics during CPR were not worse with device use, as reported in table 1⇓. In both groups, CI was ∼40% of NSR, and LVMBF was ∼40 –75% of NSR.
Conclusions: Use of a 260g sternal accelerometer/force-measurement device with manual chest compressions did not have adverse effects on CPR hemodynamics.