US5456718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting surgical objects within the human body
Assignee: Individual
•
Filing: 1994-01-03
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Granted: 1995-10-10
•
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 00:27
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.
References Cited (Backward Citations)
US2190431A
Cited
US2698270A
Cited
US3577136A
Cited
US3587583A
Cited
US3665449A
Cited
US4134538A
Cited
US4124664A
Cited
US4185626A
Cited
US4074249A
Cited
US4205680A
Cited
US4215342A
Cited
US4298862A
Cited
US4290993A
Cited
US4405535A
Cited
US4342904A
Cited
US4431005A
Cited
US4416289A
Cited
US4445501A
Cited
US4581524A
Cited
US4626311A
Cited
US4622543A
Cited
US4568921A
Cited
US5045071A
Cited
US4769631A
Cited
US5079006A
Cited
US4857891A
Cited
US5003291A
Cited
US5015992A
Cited
US5015993A
Cited
US5057095A
Cited
US5329944A
Cited
US5027886A
Cited
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 |