초록 ▼

The sensor guide wire assembly having a sensor element is inserted into the patient's body. Acoustic or electromagnetic waves are then emitted from an external source toward the senor element. The sensor element receives the incident waves and enters into a resonating state. The characteristics of t

The sensor guide wire assembly having a sensor element is inserted into the patient's body. Acoustic or electromagnetic waves are then emitted from an external source toward the senor element. The sensor element receives the incident waves and enters into a resonating state. The characteristics of the resonance correspond to the variable or variables to be measured. A transducer is located externally from the patient's body and receives the scattered wave and transmits a resultant signal to an electronic drive and detection unit for signal analysis.

대표청구항 ▼

[ What is claimed is:] [1.]1. A system for measuring a physiological variable in vivo in a human or animal body, comprising:a sensor device responsive to said physiological variable, comprising at least one mechanical resonant member disposed in vacuum, a property of which changes in response to the

[ What is claimed is:] [1.]1. A system for measuring a physiological variable in vivo in a human or animal body, comprising:a sensor device responsive to said physiological variable, comprising at least one mechanical resonant member disposed in vacuum, a property of which changes in response to the influence of said physiological variable, said resonant member having a quality factor (Q) greater than 10,a transmitter of ultrasound power for exciting said resonant member through body tissue to cause said resonant member to enter into a resonating state, anda receiver for recording a resonance signal emitted from said resonant member.