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US 5,456,718 AGranted
Apparatus for detecting surgical objects within the human body
OwnerDennis W. Szymaitisinventor
Life of this patent
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Abstract
An apparatus and method detects surgical objects within the human body where the apparatus includes the surgical object utilized in surgical procedures including a marker made of a selected nonmagnetostrictive, soft magnetic material which will emit known specific selected harmonic frequencies when exposed to an alternating electromagnetic field. That emission will cause a change in the alternating electromagnetic field which can be correlated to the presence of only the selected nonmagnetostrictive, soft magnetic material.
Claims12
A detectable surgical object used in surgical procedures comprising:
- a) a surgical object;
- and
- b) a marker attached to the surgical object comprised of at least one marker comprised of at least one elongated body of a selected nonmagnetostrictive, soft magnetic material with zero magnetostriction which will emit known specific intensity of selected harmonic frequencies when exposed to an alternating electromagnetic field thereby causing a change in the alternating electromagnetic field which change can be correlated to the presence of only the selected nonmagnetostrictive, soft magnetic material.
Dependencies are inferred from the claim text.