US5448996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Patient monitor sheets
Assignee: Lifesigns Inc
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Filing: 1994-02-08
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Granted: 1995-09-12
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Expires: 2014-02-08
Abstract
Abstract A patient monitor sheet device of simplified construction permits the accurate measurement of respiration, heart beat, and body position with a minimum of intrusion on the subject. Sensors are located in a bed sheet with which a subject comes in contact. One sensor produces a signal corresponding to respiratory induced, pulmonary motion, and myocardial pumping sounds. A second sensor produces a signal corresponding to changes in body position. A processor amplifies and filters the induced signals resulting in resolved output highly correlated to respiration rate, heart beat rate, and changes in body position.
Inventors
- 👤 Howard T. Bellin
- 👤 Robert P. Dingwall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:09
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/68; A61B5/6887; A61B5/6892; A61B5/02; A61B5/0205; A61B5/103; A61B5/11; A61B5/113
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
95 words
A device for monitoring patients, comprising: a) a sheet having a first sensor segment and a second sensor segment; b) said first sensor segment comprised of a metallic foil layer and a first flexible polymeric layer; c) said second sensor segment comprised of a piezoelectric film layer and a second flexible polymeric layer; d) said first sensor segment capable of generating an electrical signal corresponding to body position of said patient being monitored; and e) said second sensor segment capable of generating an electrical signal corresponding to respiratory induced, pulmonary motion and cardiovascular pumping action.
Claim 2
Independent Claim
95 words
A device for monitoring patients, comprising: a) a sheet having a first sensor segment and a second sensor segment; b) said first sensor segment comprised of a metallic foil layer and a first flexible polymeric layer; c) said second sensor segment comprised of a piezoelectric film layer and a second flexible polymeric layer; d) said first sensor segment capable of generating an electrical signal corresponding to body position of said patient being monitored; and e) said second sensor segment capable of generating an electrical signal corresponding to respiratory induced, pulmonary motion and cardiovascular pumping action.
Claim 3
Dependent Claim
42 words
The monitoring device of claim 1, wherein said first sensor segment comprised of said metallic foil layer and said first flexible polymeric layer creates electric capacitance when a part of the body of said patient being monitored exerts a weight force thereon.
Claim 4
Dependent Claim
39 words
The monitoring device of claim 1, wherein said electric signal from said first sensor segment is filtered then processed in a signal process means capable of generating a digital output corresponding to body position of said patient being monitored.
Claim 5
Dependent Claim
42 words
The monitoring device of claim 1, wherein said electric signal from said second sensor segment is filtered then processed in a signal process means capable of generating a digital output corresponding to respiration rate and heart rate of said patient being monitored.
Claim 6
Dependent Claim
45 words
The monitoring device of claim 1, wherein said electric signal from said first sensor segment is processed in a signal process means having stored program memory containing parameters which sets off an alarm when the body position of said patient being monitored exceeds said parameters.
Claim 7
Dependent Claim
48 words
The monitoring device of claim 1, wherein said electric signal from said second sensor segment is processed in a signal process means having stored program memory containing parameters which sets off an alarm when the respiratory rate of said patient being monitored exceeds or falls below said parameters.
Claim 8
Dependent Claim
49 words
The monitoring device of claim 1, wherein said electric signal from said second sensor segment is processed in a signal process means having stored program memory containing parameters which sets off an alarm when the heart beat rate of said patient being monitored exceeds or falls below said parameters.
Claim 9
Dependent Claim
96 words
A patient monitoring sheet, comprising: a) a first sensor segment comprised of a layer of aluminum foil situated between a first flexible polymeric layer and a second flexible polymeric layer; b) a second sensor segment comprised of a piezo-electric film layer situated between said second flexible polymeric layer and a third flexible polymeric layer; c) said first sensor segment capable of generating an electrical signal corresponding to body position of said patient being monitored; and d) said second sensor segment capable of generating an electrical signal corresponding to respiratory induced, pulmonary motion and cardiovascular pumping action.
Claim 10
Dependent Claim
96 words
A patient monitoring sheet, comprising: a) a first sensor segment comprised of a layer of aluminum foil situated between a first flexible polymeric layer and a second flexible polymeric layer; b) a second sensor segment comprised of a piezo-electric film layer situated between said second flexible polymeric layer and a third flexible polymeric layer; c) said first sensor segment capable of generating an electrical signal corresponding to body position of said patient being monitored; and d) said second sensor segment capable of generating an electrical signal corresponding to respiratory induced, pulmonary motion and cardiovascular pumping action.
Claim 11
Dependent Claim
39 words
The monitoring device of claim 8, wherein said electric signal from said first sensor segment is filtered then processed in a signal process means capable of generating a digital output corresponding to body position of said patient being monitored.
Claim 12
Dependent Claim
39 words
The monitoring device of claim 8, wherein said electric signal from said second sensor segment is filtered then processed in a signal process means capable of generating a digital output corresponding to respiration rate of said patient being monitored.
Claim 13
Dependent Claim
39 words
The monitoring device of claim 8, wherein said electric signal from said second sensor segment is filtered then processed in a signal process means capable of generating a digital output corresponding to heart rate of said patient being monitored.
Claim 14
Independent Claim
111 words
A device for monitoring respiratory activity, heart rate and body position, comprising: a) a first detector means sensitive to respiratory induced motion and heart beat sounds, said first detector means capable of generating a first electrical signal in response to said respiratory induced motion and heart beat; b) a second detector means sensitive to changes in body position, said detector means capable of generating a second electrical signal corresponding to movement by the detector means in response to said body position changes; and c) a processor means for receiving said first and second electrical signals from said detector means and converting said electrical signal into filtered signals for an output device.
Claim 15
Independent Claim
111 words
A device for monitoring respiratory activity, heart rate and body position, comprising: a) a first detector means sensitive to respiratory induced motion and heart beat sounds, said first detector means capable of generating a first electrical signal in response to said respiratory induced motion and heart beat; b) a second detector means sensitive to changes in body position, said detector means capable of generating a second electrical signal corresponding to movement by the detector means in response to said body position changes; and c) a processor means for receiving said first and second electrical signals from said detector means and converting said electrical signal into filtered signals for an output device.
Claim 16
Dependent Claim
14 words
The device of claim 12, wherein said first detector means comprises a piezo-electric film.
Claim 17
Dependent Claim
17 words
The device of claim 12, wherein said second detector means comprises a planar sheet of aluminum foil.
Claim 18
Dependent Claim
20 words
The device of claim 12, wherein said processor means comprises a signal amplifier coupled to at least one electronic filter.
Claim 19
Dependent Claim
28 words
The device of claim 15, wherein said filter is selected from the group consisting of those with a frequency cutoff of 5 Hz, 50 Hz, and 100 Hz.
Claim 20
Dependent Claim
27 words
The device of claim 12, wherein an alarm in communication with said processor means is triggered by a change in said respiratory induced motion or heart beat.
Claim 21
Dependent Claim
23 words
The device of claim 12, wherein an alarm in communication with said processor means is triggered by a change in said body position.
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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) | 1998-09-11 | 1999-03-13 | 1999-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-11 | 2003-03-13 | 2003-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-11 | 2007-03-13 | 2007-09-12 | $7700.00 | Window Closed / Lapsed |