US5158081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treatment of soft tissue wounds by electrical stimulation
Assignee: Wound Solutions Ltd
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Filing: 1991-05-29
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Granted: 1992-10-27
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Expires: 2011-05-29
Abstract
Abstract A method for treating pressure sores, decubitus ulcers, or other soft tissue wounds involves the application of a pulsed DC current to the patient's body to stimulate healing of the soft tissue wound. In accordance with the present invention, a pair of electrodes are applied to the patient's body outside the area of the sore, but closely adjacent the outer edges of the sore. The electrodes are placed on opposite sides of the sore and a current is applied to the patient's skin through the electrodes so that the current path is across the sore. The current is applied for a short duration and the probes are repositioned. The process is repeated as many times as necessary to direct current across the entire surface area of the wound. Unlike prior art methods of electrotherapy, the method of the present invention takes only a few minutes to treat each sore.
Inventors
- 👤 Luther S. McWhorter
- 👤 Mark H. Chandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:35
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/326
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
119 words
A method for treating pressure sores and other soft tissue wounds in a patient's skin tissue comprising: (a) positioning a pair of electrodes in contact with the patient's skin tissue closely adjacent to and on opposite sides of the soft tissue wound; (b) applying a pulsed DC current of predetermined intensity to the patient's skin through the electrodes on opposite sides of the wound for a predetermined time interval so that the current flowing between the electrodes crosses over the soft tissue wound; and (c) brushing a wide area of the patient's skin tissue surrounding the soft tissue wound with at least one of the electrodes to increase blood circulation to the skin tissue surrounding the soft tissue wound.
Claim 2
Independent Claim
119 words
A method for treating pressure sores and other soft tissue wounds in a patient's skin tissue comprising: (a) positioning a pair of electrodes in contact with the patient's skin tissue closely adjacent to and on opposite sides of the soft tissue wound; (b) applying a pulsed DC current of predetermined intensity to the patient's skin through the electrodes on opposite sides of the wound for a predetermined time interval so that the current flowing between the electrodes crosses over the soft tissue wound; and (c) brushing a wide area of the patient's skin tissue surrounding the soft tissue wound with at least one of the electrodes to increase blood circulation to the skin tissue surrounding the soft tissue wound.
Claim 3
Dependent Claim
18 words
The method according to claim 1 wherein the electrodes are positioned on laterally opposite sides of the wound.
Claim 4
Dependent Claim
18 words
The method according to claim 1 wherein the electrodes are positioned on diametrically opposite sides of the wound.
Claim 5
Dependent Claim
36 words
The method according to claim 1 wherein the electrodes are placed on laterally opposite sides of the wound during a first treatment phase and on diametrically opposite sides of the wound during a second treatment phase.
Claim 6
Dependent Claim
16 words
The method according to claim 1 wherein the current has an intensity of approximately 40 microamperes.
Claim 7
Dependent Claim
18 words
The method according to claim 1 wherein the pulsed DC current has a frequency of approximately 1 hz.
Claim 8
Dependent Claim
18 words
The method according to claim 1 wherein the pulsed DC current has a frequency of approximately 3 hz.
Claim 9
Dependent Claim
33 words
The method according to claim 1 further including the step of reversing the polarity of the DC current at predetermined intervals of short duration to prevent acid and base build-up on the electrodes.
Claim 10
Dependent Claim
23 words
The method according to claim 1 wherein the current is applied for a short duration each time the electrodes are positioned or repositioned.
Claim 11
Dependent Claim
16 words
The method according to claim 9 wherein the current is applied in intervals of 10-60 seconds.
Claim 12
Independent Claim
142 words
A method for treating pressure sores and other soft tissue wounds, in a patient's skin tissue comprising: (a) attaching pads made of an absorbent material to a pair of electrodes; (b) saturating the pads with a zinc oxide solution; (c) positioning the electrodes closely adjacent to the soft tissue wound with the electrodes on opposite sides of the wound; (d) applying a pulsed DC current of predetermined intensity to the patient's skin tissue through the electrodes for a predetermined time interval of relatively short duration so that the current flowing between the electrodes crosses directly over the soft tissue wound to stimulate the healing of the soft tissue wound and to effect iontophoresis of zinc into the tissue adjacent the soft tissue wound; and (e) reversing the direction of current flow at a relatively high rate while the current is being applied.
Claim 13
Independent Claim
142 words
A method for treating pressure sores and other soft tissue wounds, in a patient's skin tissue comprising: (a) attaching pads made of an absorbent material to a pair of electrodes; (b) saturating the pads with a zinc oxide solution; (c) positioning the electrodes closely adjacent to the soft tissue wound with the electrodes on opposite sides of the wound; (d) applying a pulsed DC current of predetermined intensity to the patient's skin tissue through the electrodes for a predetermined time interval of relatively short duration so that the current flowing between the electrodes crosses directly over the soft tissue wound to stimulate the healing of the soft tissue wound and to effect iontophoresis of zinc into the tissue adjacent the soft tissue wound; and (e) reversing the direction of current flow at a relatively high rate while the current is being applied.
Claim 14
Dependent Claim
18 words
The method according to claim 11 wherein the electrodes are positioned on laterally opposite sides of the wound.
Claim 15
Dependent Claim
18 words
The method according to claim 11 wherein the electrodes are positioned on diametrically opposite sides of the wound.
Claim 16
Dependent Claim
36 words
The method according to claim 11 wherein the electrodes are placed on laterally opposite sides of the wound during a first treatment phase and on diametrically opposite sides of the wound during a second treatment phase.
Claim 17
Dependent Claim
52 words
The method according to claim 11 further including the step of brushing a wide area surrounding the soft tissue wound with at least one of the electrodes while the other of the electrodes is positioned adjacent the area being brushed to increase blood circulation to the tissue surrounding the soft tissue wound.
Claim 18
Dependent Claim
16 words
The method according to claim 11 wherein the current has an intensity of approximately 40 microamperes.
Claim 19
Dependent Claim
18 words
The method according to claim 11 wherein the pulsed DC current has a frequency of approximately 1 hz.
Claim 20
Dependent Claim
18 words
The method according to claim 11 wherein the pulsed DC current has a frequency of approximately 3 hz.
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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) | 1995-10-27 | 1996-04-27 | 1996-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-27 | 2000-04-27 | 2000-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-27 | 2004-04-27 | 2004-10-27 | $7700.00 | Window Closed / Lapsed |