Patent US5490820A successfully refreshed from Google Patents.
US5490820A
Expired / Lapsed
US
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Active compression/decompression cardiac assist/support device and method
Assignee: Datascope Investment Corp
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Filing: 1993-03-12
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Granted: 1996-02-13
•
Expires: 2013-03-12
Abstract
Abstract An active compression/decompression CPR device capable of providing both complete cardiopulmonary support and cardiopulmonary assistance includes two or more thoracic compressors, preferably inflatable bladders, positioned so that the chest can first be flattened and compressed, increasing the pressure in the chest, and then circularized and decompressed, decreasing the pressure in the chest. When inflatable bladders are used, they can be surrounded with a rigidifying vest which resists outward bladder expansion. Compression and decompression can be performed along with abdominal compression, and the device is capable of shifting between support and assist modes when the patient's condition so requires. Also described is a method of compressing and then decompressing a patient's thorax by applying anterior and/or posterior pressure to the thorax, so as to compress the thorax and increase pressure therein, relieving that pressure, and then applying lateral pressure to the thorax to decompress and relieve pressure in the thorax, and then relieving the lateral pressure.
Inventors
- 👤 Robert B. Schock
- 👤 Victoria Hunsicker-Sanko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:21
CPC Classifications
A; A61; A61H; A61H9/00; A61H9/005; A61H9/0078; A61H31/00; A61H31/004; A61H31/006; A61H31/008; A61H2031/002; A61H2031/003; A61H2201/00; A61H2201/01; A61H2201/0103; A61H2201/10; A61H2201/12; A61H2201/1238; A61H2201/16; A61H2201/1602; A61H2201/165; A61H2205/00; A61H2205/08; A61H2205/083; A61H2230/00; A61H2230/04; A61N; A61N1/00
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
201 words
A device for compressing and decompressing a patient's thorax, the patient having a heart, comprising: a first thoracic compressor suitably dimensioned and disposed to cover at least a portion of an anterior region of the thorax, said first thoracic compressor being positioned adjacent to the thorax; a second thoracic compressor suitably dimensioned and disposed to cover at least a portion of a lateral region of the thorax, said second thoracic compressor being positioned substantially adjacent to and lateral of the patient's thorax; urging means for urging at least one of said thoracic compressors against the thorax, such that when a particular one of said thoracic compressors is actuated, said urging means causes said particular thoracic compressor to press against the thorax; and a compression controller for sequentially actuating and deactuating said first and said second thoracic compressors, wherein when said first thoracic compressor is inflated, the patient's thorax is compressed and pressure in the thorax increases, so that blood is driven away from the heart, and wherein when said second thoracic compressor is inflated, lateral force is applied to the patient's thorax, the patient's thorax is decompressed and pressure in the thorax decreases, so that blood is drawn toward the heart.
Claim 2
Independent Claim
201 words
A device for compressing and decompressing a patient's thorax, the patient having a heart, comprising: a first thoracic compressor suitably dimensioned and disposed to cover at least a portion of an anterior region of the thorax, said first thoracic compressor being positioned adjacent to the thorax; a second thoracic compressor suitably dimensioned and disposed to cover at least a portion of a lateral region of the thorax, said second thoracic compressor being positioned substantially adjacent to and lateral of the patient's thorax; urging means for urging at least one of said thoracic compressors against the thorax, such that when a particular one of said thoracic compressors is actuated, said urging means causes said particular thoracic compressor to press against the thorax; and a compression controller for sequentially actuating and deactuating said first and said second thoracic compressors, wherein when said first thoracic compressor is inflated, the patient's thorax is compressed and pressure in the thorax increases, so that blood is driven away from the heart, and wherein when said second thoracic compressor is inflated, lateral force is applied to the patient's thorax, the patient's thorax is decompressed and pressure in the thorax decreases, so that blood is drawn toward the heart.
Claim 3
Dependent Claim
34 words
A device according to claim 1, wherein said urging means comprises an expansion limiting harness which at least partially surrounds at least one of the first and said second thoracic compressors and said patient.
Claim 4
Dependent Claim
44 words
A device according to claim 2, wherein said expansion limiting harness comprises: a vest having at least one evacuable chamber; and a plurality of beads disposed in said evacuable chamber, wherein when said chamber is evacuated, said beads are compressed, and said vest stiffens.
Claim 5
Dependent Claim
31 words
A device according to claim 1, further comprising at least one set of electrical signal detection pads disposed in a location for detecting bodily electrical signals during operation of said device.
Claim 6
Dependent Claim
24 words
A device according to claim 1, further comprising at least a pair of defibrillation contact pads disposed in a location for performing cardiac defibrillation.
Claim 7
Dependent Claim
89 words
A device according to claim 1, wherein said device has an assist mode of operation wherein said device operates at least one of said first and said second thoracic compressors and said urging means in a manner suitable to assist the patient when the patient has impaired cardiac function, and a support mode of operation wherein said device operates at least one of said first and said second thoracic compressors and said urging means in a manner suitable to support the patient when the patient has no cardiac function.
Claim 8
Dependent Claim
28 words
A device according to claim 6, further comprising monitoring means for monitoring a condition of the patient and for selectively implementing said assist mode and said support mode.
Claim 9
Dependent Claim
46 words
A device according to claim 3, wherein at least one said thoracic compressor is affixed to said vest and further comprising means for attaching said affixed thoracic compressor to the patient, wherein when said thoracic compressor is deactuated, said thoracic compressor pulls on said patient's thorax.
Claim 10
Dependent Claim
58 words
A device according to claim 1, further comprising: at least one abdominal bladder, said bladder suitably dimensioned and disposed to cover at least a portion of the abdomen of the patient, wherein said abdominal bladder is inflated to a predetermined volume or pressure or in timed sequence with the inflation of at least one of said thoracic compressors.
Claim 11
Dependent Claim
14 words
A device according to claim 1, further comprising ventilating means for ventilating the patient.
Claim 12
Independent Claim
187 words
A device for compressing and decompressing a patient's thorax, the patient having a heart, comprising: a first thoracic compressor and a first opposing surface, said first thoracic compressor and said first opposing surface being dimensioned and disposed so that when the patient is placed therebetween, said first thoracic compressor and said first opposing surface are respectively positioned anteriorly and posteriorly adjacent to the patient's thorax; a second thoracic compressor and a second opposing surface, said second thoracic compressor and said second surface being dimensioned and disposed so that when the patient is placed therebetween, said second thoracic compressor and said second opposing surface are positioned adjacent to and laterally of the patient's thorax; and a compression controller for sequentially actuating and deactuating each of said first and said second thoracic compressors, wherein when said first thoracic compressor is actuated, the patient's thorax is compressed and pressure in the thorax increases, so that blood is driven away from the heart, and wherein when said second thoracic compressor is actuated, the patient's thorax is decompressed and pressure in the thorax decreases, so that blood is drawn toward the heart.
Claim 13
Independent Claim
187 words
A device for compressing and decompressing a patient's thorax, the patient having a heart, comprising: a first thoracic compressor and a first opposing surface, said first thoracic compressor and said first opposing surface being dimensioned and disposed so that when the patient is placed therebetween, said first thoracic compressor and said first opposing surface are respectively positioned anteriorly and posteriorly adjacent to the patient's thorax; a second thoracic compressor and a second opposing surface, said second thoracic compressor and said second surface being dimensioned and disposed so that when the patient is placed therebetween, said second thoracic compressor and said second opposing surface are positioned adjacent to and laterally of the patient's thorax; and a compression controller for sequentially actuating and deactuating each of said first and said second thoracic compressors, wherein when said first thoracic compressor is actuated, the patient's thorax is compressed and pressure in the thorax increases, so that blood is driven away from the heart, and wherein when said second thoracic compressor is actuated, the patient's thorax is decompressed and pressure in the thorax decreases, so that blood is drawn toward the heart.
Claim 14
Dependent Claim
31 words
A device according to claim 11, further comprising at least one set of electrical signal detection pads disposed in a location for detecting bodily electrical signals during operation of said device.
Claim 15
Dependent Claim
24 words
A device according to claim 11, further comprising at least a pair of defibrillation contact pads disposed in a location for performing cardiac defibrillation.
Claim 16
Dependent Claim
85 words
A device according to claim 11, wherein said device has an assist mode of operation wherein said device operates at least one of said first and said second thoracic compressors in a manner suitable to assist the patient when the patient has impaired cardiac function, and a support mode of operation wherein said device operates at least one of said first and said second thoracic compressors and said urging means in a manner suitable to support the patient when the patient has no cardiac function.
Claim 17
Dependent Claim
28 words
A device according to claim 14, further comprising monitoring means for monitoring a condition of the patient and for selectively implementing said assist mode and said support mode.
Claim 18
Dependent Claim
48 words
A device according to claim 11, further comprising: at least one abdominal bladder, said bladder suitably dimensioned and disposed to cover at least a portion of the abdomen of the patient, wherein said abdominal bladder is inflated in timed sequence to at least one of said thoracic compressors.
Claim 19
Dependent Claim
14 words
A device according to claim 11, further comprising ventilating means for ventilating the patient.
Claim 20
Independent Claim
206 words
A device for compressing and decompressing a patient's thorax, the patient having a heart, comprising: a first inflatable bladder and a first opposing surface, said first bladder and said first opposing surface being dimensioned and disposed so that when the patient is placed therebetween, said first bladder and said first opposing surface are respectively positioned across an anterior part and a posterior part of the patient's thorax; a second inflatable bladder which is substantially adjacent to and lateral of the patient's thorax, and a second opposing surface, said second bladder and said second surface being dimensioned and disposed so that when the patient is placed therebetween, said second bladder and said second opposing surface are positioned across at least a part of the lateral regions of the patient's thorax; and an inflation controller for sequentially inflating and deflating said first and said second bladders, wherein said first bladder is inflated, the patient's thorax is compressed and pressure in the thorax increases, so that blood is driven away from the heart, and wherein when said second bladder is inflated, lateral force is applied to the patient's thorax and the patient's thorax is decompressed and pressure in the thorax decreases, so that blood is drawn toward the heart.
Claim 21
Independent Claim
206 words
A device for compressing and decompressing a patient's thorax, the patient having a heart, comprising: a first inflatable bladder and a first opposing surface, said first bladder and said first opposing surface being dimensioned and disposed so that when the patient is placed therebetween, said first bladder and said first opposing surface are respectively positioned across an anterior part and a posterior part of the patient's thorax; a second inflatable bladder which is substantially adjacent to and lateral of the patient's thorax, and a second opposing surface, said second bladder and said second surface being dimensioned and disposed so that when the patient is placed therebetween, said second bladder and said second opposing surface are positioned across at least a part of the lateral regions of the patient's thorax; and an inflation controller for sequentially inflating and deflating said first and said second bladders, wherein said first bladder is inflated, the patient's thorax is compressed and pressure in the thorax increases, so that blood is driven away from the heart, and wherein when said second bladder is inflated, lateral force is applied to the patient's thorax and the patient's thorax is decompressed and pressure in the thorax decreases, so that blood is drawn toward the heart.
Claim 22
Dependent Claim
45 words
A device according to claim 18 further comprising: urging means for urging at least one of said inflatable bladders against the thorax, such that when a particular one of said bladders is inflated, said urging means causes said particular bladder to press against the thorax.
Claim 23
Dependent Claim
29 words
A device according to claim 19, wherein said urging means comprises an expansion limiting harness which at least partially surrounds at least one of said bladders and the patient.
Claim 24
Dependent Claim
48 words
A device according to claim 20, wherein said expansion limiting harness comprises: a vest having at least one evacuable chamber; and a plurality of beads disposed in said evacuable chamber, wherein said expansion limiting harness when said chamber is evacuated, said beads are compressed, and said vest rigidifies.
Claim 25
Dependent Claim
31 words
A device according to claim 18, further comprising at least one set of electrical signal detection pads disposed in a location for detecting bodily electrical signals during operation of said device.
Claim 26
Dependent Claim
24 words
A device according to claim 18, further comprising at least a pair of defibrillation contact pads disposed in a location for performing cardiac defibrillation.
Claim 27
Dependent Claim
81 words
A device according to claim 18, wherein said device has an assist mode of operation wherein said device operates at least one of said first and said second inflatable bladders in a manner suitable to assist the patient when the patient has impaired cardiac function, and a support mode of operation wherein said device operates at least one of said first and said second inflatable bladders in a manner suitable to support the patient when the patient has no cardiac function.
Claim 28
Dependent Claim
28 words
A device according to claim 24, further comprising monitoring means for monitoring a condition of the patient and for selectively implementing said assist mode and said support mode.
Claim 29
Dependent Claim
48 words
A device according to claim 21, wherein at least one of said bladders is affixed to said vest which can rigidify and further comprising means for attaching said bladder to the patient, wherein when said bladder which is affixed is deflated, said bladder pulls on the patient's thorax.
Claim 30
Dependent Claim
55 words
A device according to claim 18, further comprising: at least one abdominal bladder, said bladder suitable dimensioned and disposed to cover at least a portion of the abdomen of the patient, wherein said abdominal bladder is inflated to a predetermined volume or pressure or in timed sequence to at least one of said thoracic bladders.
Claim 31
Dependent Claim
14 words
A device according to claim 18, further comprising ventilating means for ventilating the patient.
Claim 32
Independent Claim
197 words
A device for compressing and decompressing a patient's thorax, the patient having a heart, comprising: a first thoracic compressor; a second thoracic compressor; a third thoracic compressor acting in opposition to said second thoracic compressor, said first, said second, and said third thoracic compressors being dimensioned and disposed about the patient so that said first thoracic compressor is positioned across at least a part of an anterior region of the thorax, and said second and said third thoracic compressors are substantially adjacent to and lateral of the patient's thorax, and said second and third thoracic compressors are each positioned across at least a part of lateral regions of the thorax, and a compression controller for sequentially actuating and deactuating said first thoracic compressor and said second and third thoracic compressors, wherein when said first thoracic compressor is actuated, the patient's thorax is compressed and pressure in the thorax increases, so that blood is driven away from the heart, and wherein when said second and said third thoracic compressors are actuated, lateral force is applied to the patient's thorax, the patient's thorax is decompressed and pressure in the thorax decreases, so that blood is drawn toward the heart.
Claim 33
Independent Claim
197 words
A device for compressing and decompressing a patient's thorax, the patient having a heart, comprising: a first thoracic compressor; a second thoracic compressor; a third thoracic compressor acting in opposition to said second thoracic compressor, said first, said second, and said third thoracic compressors being dimensioned and disposed about the patient so that said first thoracic compressor is positioned across at least a part of an anterior region of the thorax, and said second and said third thoracic compressors are substantially adjacent to and lateral of the patient's thorax, and said second and third thoracic compressors are each positioned across at least a part of lateral regions of the thorax, and a compression controller for sequentially actuating and deactuating said first thoracic compressor and said second and third thoracic compressors, wherein when said first thoracic compressor is actuated, the patient's thorax is compressed and pressure in the thorax increases, so that blood is driven away from the heart, and wherein when said second and said third thoracic compressors are actuated, lateral force is applied to the patient's thorax, the patient's thorax is decompressed and pressure in the thorax decreases, so that blood is drawn toward the heart.
Claim 34
Dependent Claim
63 words
A device according to claim 29, wherein each of said first, second and said third thoracic compressors comprises an inflatable bladder, and further comprising: at least one urging means for urging at least one of said inflatable bladders against the thorax, such that when a said bladder is inflated, said urging means causes at least said particular bladder to press against said thorax.
Claim 35
Dependent Claim
28 words
A device according to claim 30, wherein said urging means comprises an expansion limiting harness which at least partially surrounds at least one said bladder and the patient.
Claim 36
Dependent Claim
44 words
A device according to claim 31, wherein said expansion limiting harness comprises: a vest having at least one evacuable chamber; and a plurality of beads disposed in said evacuable chamber, wherein when said chamber is evacuated, said beads are compressed, and said vest rigidifies.
Claim 37
Dependent Claim
31 words
A device according to claim 29, further comprising at least one set of electrical signal detection pads disposed in a location for detecting bodily electrical signals during operation of said device.
Claim 38
Dependent Claim
24 words
A device according to claim 29, further comprising at least a pair of defibrillation contact pads disposed in a location for performing cardiac defibrillation.
Claim 39
Dependent Claim
85 words
A device according to claim 29, wherein said device has an assist mode of operation wherein said device operates at least one of said first, said second and said third thoracic compressors in a manner suitable to assist the patient when the patient has impaired cardiac function, and a support mode of operation wherein said device operates at least one of said first, said second and said third thoracic compressors in a manner suitable to support the patient when the patient has no cardiac function.
Claim 40
Dependent Claim
28 words
A device according to claim 35, further comprising monitoring means for monitoring a condition of the patients and for selectively implementing said assist mode and said support mode.
Claim 41
Dependent Claim
49 words
A device according to claim 32, wherein at least one of said bladders is affixed to said vest which can rigidify and further comprising means for attaching said affixed bladder to the patient, wherein when said bladder which is affixed is deflated, said bladder pulls on the patient's thorax.
Claim 42
Dependent Claim
47 words
A device according to claim 29, further comprising: at least one abdominal bladder, said bladder suitably dimensioned and disposed to cover at least a portion of the abdomen of the patient, wherein said abdominal bladder is inflated in relationship to at least one of said thoracic compressors.
Claim 43
Dependent Claim
30 words
A device according to claim 29, further comprising a fourth thoracic compressor, said fourth thoracic compressor being positioned across at least a part of a posterior region of the thorax.
Claim 44
Dependent Claim
15 words
A device according to claim 39, wherein said fourth thoracic compressor comprises an inflatable bladder.
Claim 45
Dependent Claim
14 words
A device according to claim 29, further comprising ventilating means for ventilating the patient.
Claim 46
Independent Claim
128 words
A method of compressing and then decompressing a patient's thorax, the patient having a heart, comprising the steps of: applying at least one of anterior pressure and posterior pressure to the thorax and compressing the thorax thereby increasing pressure in the thorax, so that blood is pushed from the heart; relieving said at least one of anterior pressure and posterior pressure; applying lateral pressure to the thorax and decompressing the thorax thereby decreasing pressure in the thorax, so that blood is drawn toward the heart; relieving said lateral pressure; and regulating said steps of applying said at least one of anterior pressure and posterior pressure and applying lateral pressure to obtain alternate compression and decompression of the heart in the thorax at a rate which provides cardiac assistance.
Claim 47
Independent Claim
128 words
A method of compressing and then decompressing a patient's thorax, the patient having a heart, comprising the steps of: applying at least one of anterior pressure and posterior pressure to the thorax and compressing the thorax thereby increasing pressure in the thorax, so that blood is pushed from the heart; relieving said at least one of anterior pressure and posterior pressure; applying lateral pressure to the thorax and decompressing the thorax thereby decreasing pressure in the thorax, so that blood is drawn toward the heart; relieving said lateral pressure; and regulating said steps of applying said at least one of anterior pressure and posterior pressure and applying lateral pressure to obtain alternate compression and decompression of the heart in the thorax at a rate which provides cardiac assistance.
Claim 48
Dependent Claim
21 words
A method according to claim 42, wherein said regulating is performed in response to detection of a heartbeat of the patient.
Claim 49
Dependent Claim
27 words
A method according to claim 42, further comprising the step of determining whether the patient requires cardiac support or cardiac assistance, and said regulating is selected accordingly.
Claim 50
Dependent Claim
23 words
A method according to claim 42, further comprising a step of ventilating the patient in timed sequence to said decompressing of said thorax.
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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) | 1999-02-12 | 1999-08-14 | 2000-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-12 | 2003-08-14 | 2004-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-12 | 2007-08-14 | 2008-02-13 | $7700.00 | Window Closed / Lapsed |