Methods of and apparatus for positioning and aiming an ultrasonic probe
摘要
A method of aiming an ultrasonic transducer at the center of a blood vessel such as a descending aorta. Automatic gain control is employed to amplify the transducer output signal to a constant level, and the transducer is manipulated until the gain in the amplifier circuitry reaches a minimum. The transducer output signal is used in calculating the cardiac output of the patient and/or his or her cardiac index and/or systemic vascular resistance.
申请公布号
US4858614(A)
申请公布日期
1989.08.22
申请号
US19860188356
申请日期
1986.04.29
申请人
STEVENS, JERRY D.;STEELE, DONALD R.;GORNEY, JR., DONALD A.
发明人
STEVENS, JERRY D.;STEELE, DONALD R.;GORNEY, JR., DONALD A.