초록 ▼

A device for tracking catheters includes an oscillator which is coupled to a transmit coil. The transmit coil is rotated in a direction transverse to the longitudinal axis of the transmit coil. A receive coil situated on the guide wire of a catheter inserted into a patient\s body receives the signal

A device for tracking catheters includes an oscillator which is coupled to a transmit coil. The transmit coil is rotated in a direction transverse to the longitudinal axis of the transmit coil. A receive coil situated on the guide wire of a catheter inserted into a patient\s body receives the signal transmitted from the transmit coil. A rectifier rectifies the received signal, and a filter filters the rectified received signal. A strobe circuit provides strobes of light in response to the rectifie received signal and cooperates with bar image forming circuitry and structure to provide an image of a bar which is aligned with the longitudinal axis of the receive coil, which is indicative of the orientation of the catheter and guide wire on which the receive coil is situated. A bar display indicates the relative proximity of the transmit coil to the receive coil, and a numeric display provides a read-out of the distance between the transmit coil and the receive coil.

대표청구항 ▼

Apparatus for determining the location of an object adapted to be inserted into the body of a patient, which comprises: a transmitter, the transmitter including an oscillator for generating a transmit signal, and a transmit coil coupled to the oscillator for transmitting a signal corresponding to th

Apparatus for determining the location of an object adapted to be inserted into the body of a patient, which comprises: a transmitter, the transmitter including an oscillator for generating a transmit signal, and a transmit coil coupled to the oscillator for transmitting a signal corresponding to the transmit signal; a receiver, the receiver including a receive coil for receiving the signal transmitted by the transmitter by mutual inductance between the two coils, means for processing the signal received by the receive coil, one of the transmit coil and the receive coil being situated on the object adapted to be inserted into the patient\s body, and the other of the receive coil and the transmit coil being located externally to the patient\s body, the processing means providing an output signal which varies in accordance with the strength of the signal received by the receive coil and detecting the distance the transmit coil is form the receive coil based on the strength of the signal received by the receive coil, the receiver further including display means coupled to the processing means for indicating at least the relative distance which the transmit coil is from the receive coil, whereby the location of the object adapted to be inserted into the patient\s body may be located; and means for controlling the strength of the signal transmitted by the transmit coil in response to the output signal of the processing means of the receiver, the control means being operatively coupled to the processing means.