Pressure volume parameters for optimal function of an intraaortic balloon without a pump.
An air filled intraaortic balloon connected to an extravascular air chamber (compression chamber system-CCS) was used in 10 anesthetized dogs to increase its stroke volume (SV). Highest SV increases (up to over 200%) were observed at low SV states, with a high CCS volume and with high increases of the systolic pressure. The CCS pressure--systolic pressure relationship was a sigmoid-like curve. In conclusion, highest SV's may be achieved at low SV states, using CCS volumes about 400 ml and the highest CCS pressure that may cause a linear aortic pressure increase.
D000818:Animals; D001794:Blood Pressure; D004285:Dogs; D005069:Evaluation Studies as Topic; D007423:Intra-Aortic Balloon Pumping / Q000295:instrumentation*; D013318:Stroke Volume