Circuits for determining very accurately the position of a devic

Details Circuits for determining very accurately the position of a devic Circuits for determining very accurately the position of a devic

1982-04-26

1983-11-22

Recla, Henry J.

Surgery

Truss

Pad

128 15, 12820714, 324243, 340551, A61B 505, A61B 506

Patent

active

044162898

ABSTRACT:
A circuit for determining very accurately the position of a device inside biological tissue in which a probe generates a small magnetic field which can be disturbed by a magnetically permeable metal in the device inside the tissue when a narrow end of the probe is positioned immediately adjacent to tissue containing the metal, whereby after the metal-carrying device is inserted in the tissue, the end of the probe is used to precisely locate the device by scanning the tissue until the magnetic field is disturbed, which disturbance causes the circuit to generate a signal.

REFERENCES:
patent: 2442805 (1948-06-01), Gilson
patent: 3371272 (1968-02-01), Stanton
patent: 3436649 (1969-04-01), Takechi et al.
patent: 3460528 (1969-08-01), Carney
patent: 3826973 (1974-07-01), Pflaum
Cullen et al., "A New Method of Positioning Endotracheal Tubes," Anesthesiology, vol. 43, No. 5, Nov. 1975, pp. 596-599.

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