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

1981-05-07

1984-05-01

Howell, Kyle L.

Surgery

Truss

Perineal

12820714, 128737, 324233, 324443, 340551, A61B 612

Patent

active

044455011

ABSTRACT:
A method of and apparatus for determining very accurately the position of a device inside biological tissue comprising a detecting instrument with a probe, which 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 causes the instrument to emit 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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