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US5456718A
Expired / Lapsed
US
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Apparatus for detecting surgical objects within the human body
Assignee: Individual
•
Filing: 1994-01-03
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Granted: 1995-10-10
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Expires: 2014-01-03
Abstract
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.
Inventors
- 👤 Dennis W. Szymaitis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:20
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/06; A61B90/00; A61B90/39; A61B90/90; A61B90/98; A61F; A61F13/00; A61F13/15; A61F13/44; G; G01; G01V; G01V15/00; A61B90/08; A61B2090/0804; A61F2013/00361; A61F2013/00902; A61F2013/00936
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
87 words
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.
Claim 2
Dependent Claim
87 words
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.
Claim 3
Dependent Claim
15 words
The detectable surgical object of claim 1 wherein the surgical object is a surgical sponge.
Claim 4
Dependent Claim
15 words
The detectable surgical object of claim 2 wherein the marker is woven into the sponge.
Claim 5
Dependent Claim
13 words
The detectable surgical object of claim 1 wherein the coating is radio opaque.
Claim 6
Dependent Claim
16 words
The detectable surgical object of claim 1 wherein the marker comprises a soft magnetic amorphous material.
Claim 7
Dependent Claim
18 words
The detectable surgical object of claim 1 wherein the marker comprises a ribbon of soft magnetic amorphous material.
Claim 8
Dependent Claim
15 words
The detectable surgical object of claim 1 also comprising a biocompatible coating encapsulating the marker.
Claim 9
Dependent Claim
20 words
The detectable surgical object of claim 1 wherein the marker comprises at least one fiber of soft magnetic amorphous material.
Claim 10
Dependent Claim
16 words
The detectable surgical object of claim 1 wherein the marker comprises a soft magnetic crystalline material.
Claim 11
Dependent Claim
18 words
The detectable surgical object of claim 1 wherein the marker comprises a ribbon of soft magnetic crystalline material.
Claim 12
Dependent Claim
20 words
The detectable surgical object of claim 1 wherein the marker comprises at least one fiber of soft magnetic crystalline material.
Claim 13
Dependent Claim
22 words
The detectable surgical object of claim 1 wherein the at least one elongated body has an aspect ratio of at least 200.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-10-09 | 1999-04-10 | 1999-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-09 | 2003-04-10 | 2003-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-09 | 2007-04-10 | 2007-10-10 | $7700.00 | Window Closed / Lapsed |