Surgical implement detector utilizing a resonant marker

Details Surgical implement detector utilizing a resonant marker Surgical implement detector utilizing a resonant marker

1989-11-16

1991-10-15

Jaworski, Francis

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

128899, 604 20, 600 12, 600 13, 340572, A61F 1316

Patent

active

050570951

ABSTRACT:
Apparatus for detecting a surgical implement in human or animal tissue comprises a detector responsive to the presence, within an interrogation zone, of a surgical implement to which a marker is secured. The marker is adapted to produce identifying signal characteristics within a frequency band generated in the interrogation zone. Variations in the phase and or direction of the interrogating field and changes in the electromagnetic coupling between markers and receiver optimize coupling therebetween.

REFERENCES:
patent: 3587583 (1971-06-01), Greenberg
patent: 4384281 (1983-05-01), Cooper
patent: 4658818 (1987-04-01), Miller Jr. et al.
patent: 4710752 (1987-12-01), Cordery
patent: 4859991 (1989-08-01), Watkins et al.
patent: 4872018 (1989-10-01), Feltz et al.

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