Abstract
Blood flow sound by using the ultrasound doppler sphygmomanometer in anesthetized dogs was evaluated on its usefulness to estimate peripheral circulation as well as blood pressure. Blood pressure by this unit was well correlated to that measured by invasive procedure. When the systolic blood pressure of the dog decreased to approximately 70 mmHg, the blood flow sound was not recorded. And when the blood pressure was within these ranges, the strength of blood flow sound seemed to be well correlated to the blood pressure. However, when the dog was in an unstable condition such as in the recovery phase, these parameters were not necessarily correlated. On the contrary, pattern of the blood flow sound was changed even when the blood pressure measured by the invasive procedure was stable. This fact may suggest the peripheral blood flow was changed during the long term anesthesia/surgery, thus the possibility of estimation of peripheral blood flow by monitoring blood flow sound may be indicated.
