US4535782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for determining wound volume
Assignee: Covidien AG
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Filing: 1984-03-07
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Granted: 1985-08-20
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Expires: 2004-03-07
Abstract
Abstract A non-contacting volume determination method for use on wounds, having a known pattern of lines optically projected onto the volume to be determined. The image of the projection viewed from an angle other than the projection axis, along with the image of a reference volume located near the volume to be determined, are used to accurately determine the unknown volume.
Inventors
- 👤 Bart J. Zoltan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:53
CPC Classifications
G; G01; G01B; G01B11/00; A; A61; A61B; A61B5/00; A61B5/103; A61B5/107; A61B5/1079; A61B5/44; A61B5/441; A61B5/445; A61B90/00; A61B90/36; A61B2090/364; A61B2090/366
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
114 words
A method of determining the volume of a wound comprising: (a) placing a reference volume of known geometry adjacent a wound, (b) projecting a pattern of lines onto said wound and unto an area contiguous with said wound, (c) imaging said wound and said contiguous area from said projecting step, with means for imaging, (d) obtaining the image from said imaging step, (e) measuring the area of said image bounded by the projected pattern of the lines on said wound surface, and by the projected pattern of the lines were said wound not present, and (f) using the areas from said measuring step and said reference volume to calculate said volume of said wound.
Claim 2
Independent Claim
114 words
A method of determining the volume of a wound comprising: (a) placing a reference volume of known geometry adjacent a wound, (b) projecting a pattern of lines onto said wound and unto an area contiguous with said wound, (c) imaging said wound and said contiguous area from said projecting step, with means for imaging, (d) obtaining the image from said imaging step, (e) measuring the area of said image bounded by the projected pattern of the lines on said wound surface, and by the projected pattern of the lines were said wound not present, and (f) using the areas from said measuring step and said reference volume to calculate said volume of said wound.
Claim 3
Dependent Claim
14 words
The method of claim 1 step (a) comprising placing a cube adjacent a wound.
Claim 4
Dependent Claim
15 words
The method of claim 1 step (a) comprising placing a rectangular prism adjacent a wound.
Claim 5
Dependent Claim
14 words
The method of claim 2 step (b) comprising projecting a grid onto said wound.
Claim 6
Dependent Claim
23 words
The method of claim 3 step (c) comprising imaging said wound and said contiguous area from said projecting step, with a photographic camera.
Claim 7
Dependent Claim
24 words
The method according to claim 3 step (c) comprising imaging said wound and said contiguous area from said projecting step, with a television camera.
Claim 8
Independent Claim
172 words
A method of determining a volume of a decubitus ulcer wound, comprising: (a) placing a cube of known geometry next to a wound, with at least one surface of said cube being co-planar with said wound, (b) projecting a parallel image of a square grid of lines onto said wound with means for projecting, (c) photographing said wound, said reference cube, and said square grid of projected lines from an oblique angle to the axis of projection, (d) measuring the area of said image bounded by the locus of said projected pattern of lines upon said wound surface, and by the locus of said lines were said wound not present, (II) measuring the area of said image of the side of said reference cube that is co-planar with said wound, and (e) using said area from said measuring sub-step II to normalize the areas from said measuring sub-step I and (f) determining said volume by multiplying the sum of the areas obtained in step (e) by the distance between the projected lines.
Claim 9
Independent Claim
172 words
A method of determining a volume of a decubitus ulcer wound, comprising: (a) placing a cube of known geometry next to a wound, with at least one surface of said cube being co-planar with said wound, (b) projecting a parallel image of a square grid of lines onto said wound with means for projecting, (c) photographing said wound, said reference cube, and said square grid of projected lines from an oblique angle to the axis of projection, (d) measuring the area of said image bounded by the locus of said projected pattern of lines upon said wound surface, and by the locus of said lines were said wound not present, (II) measuring the area of said image of the side of said reference cube that is co-planar with said wound, and (e) using said area from said measuring sub-step II to normalize the areas from said measuring sub-step I and (f) determining said volume by multiplying the sum of the areas obtained in step (e) by the distance between the projected lines.
Claim 10
Dependent Claim
17 words
The method of claim 7 step (d) wherein said measuring sub-steps I and II are conducted simultaneously.
Claim 11
Dependent Claim
17 words
The method of claim 7 step (d) wherein said measuring sub-steps I and II are conducted sequentially.
Claim 12
Dependent Claim
18 words
The method of claim 7 step (d) wherein said measuring sub-steps I and II are conducted reverse sequentially.
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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) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |