US4846181A
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US
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Soft tissue wound healing therapy utilizing pulsed electrical stimulation
Assignee: REHABILLICARE Inc
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Filing: 1987-10-02
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Granted: 1989-07-11
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Expires: 2007-10-02
Abstract
Abstract Wound healing therapy utilizing pulsed electrical stimulation is disclosed with the process including repeated short treatments of electrical stimulation applied to a soft tissue wound through an active electrode positioned preferably at the wound and with a dispersive electrode positioned at a distance from the wound. The active electrode positioned at the wound is normally caused to have negative pulses applied therethrough to the wound during a first treatment period of a treatment cycle, and thereafter is made to have positive pulses applied therethrough to the wound during a second treatment period of the treatment cycle, with the treatment cycle being preferably thereafter repeated one or more times in treating most wounds, and with the negative pulses causing debriding of the wound. Effectively treated soft tissue wounds include partial thickness and full thickness open skin wounds, and particularly chronic ulcers, burns, and skin flaps by way of example, with electrical stimulation being effected by both direct pad and hydrotherapy applications utilizing an electrical pulse stimulating unit capable of delivering pulses at a predetermined pulse intensity and rate.
Inventors
- 👤 Katherine H. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:29
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/326
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
161 words
A method for enhancing soft tissue wound healing utilizing pulsed electrical stimulation, said method comprising: positioning an active electrode at a wound to be treated; positioning a dispersive electrode at a body having said wound thereon with said dispersive electrode engaging said body at a position spaced from said wound to be treated; applying substantially rectangular pulses of electrical energy of predetermined polarity and having a high intensity of at least about 2.8 microcoulombs per pulse through said active electrode to said wound during repeated intervals of a first treatment period with said intervals being of timewise short duration relative to the time elapsed between application of said pulses; and applying substantially rectangular pulses of electrical energy of a polarity opposite to that of said predetermined polarity and having a high intensity of at least about 2.8 microcoulombs per pulse through said active electrode to said wound during repeated intervals of a second treatment period that follows said first treatment period.
Claim 2
Independent Claim
161 words
A method for enhancing soft tissue wound healing utilizing pulsed electrical stimulation, said method comprising: positioning an active electrode at a wound to be treated; positioning a dispersive electrode at a body having said wound thereon with said dispersive electrode engaging said body at a position spaced from said wound to be treated; applying substantially rectangular pulses of electrical energy of predetermined polarity and having a high intensity of at least about 2.8 microcoulombs per pulse through said active electrode to said wound during repeated intervals of a first treatment period with said intervals being of timewise short duration relative to the time elapsed between application of said pulses; and applying substantially rectangular pulses of electrical energy of a polarity opposite to that of said predetermined polarity and having a high intensity of at least about 2.8 microcoulombs per pulse through said active electrode to said wound during repeated intervals of a second treatment period that follows said first treatment period.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein said high intensity substantially rectangular pulses have a pulse width of at least about 140 microseconds.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein said applied pulses are substantially constant current pulses having an intensity of at least about 20 milliamperes.
Claim 5
Dependent Claim
20 words
The method of claim 3 wherein said applied pulses have an intensity of between about 20 milliamperes and 50 milliamperes.
Claim 6
Dependent Claim
16 words
The method of claim 4 wherein said applied pulses have an intensity of about 35 milliamperes.
Claim 7
Dependent Claim
22 words
The method of claim 1 wherein said pulses are applied at an intensity of between about 2.8 and 7.0 microcoulombs per pulse.
Claim 8
Dependent Claim
19 words
The process of claim 6 wherein said pulses are applied at an intensity of about 5 microcoulombs per pulse.
Claim 9
Dependent Claim
25 words
The method of claim 1 wherein said pulses are applied at a rate of between about 32 pulses per second and 128 pulses per second.
Claim 10
Dependent Claim
19 words
The method of claim 1 wherein said pulses are applied at a rate of about 128 pulses per second.
Claim 11
Dependent Claim
20 words
The method of claim 1 wherein said pulses are applied for repeated intervals of between about 15 and 45 minutes.
Claim 12
Dependent Claim
17 words
The method of claim 1 wherein said pulses are applied for repeated intervals of about 30 minutes.
Claim 13
Dependent Claim
24 words
The method of claim 1 wherein said pulses are applied for repeated intervals having an elapsed time therebetween of at least about 4 hours.
Claim 14
Dependent Claim
23 words
The method of claim 1 wherein said method is utilized for treatment of one of partial thickness and full thickness open skin wounds.
Claim 15
Dependent Claim
19 words
The method of claim 13 wherein said method is sued for one of chronic ulcers, burns, and skin flaps.
Claim 16
Dependent Claim
18 words
The method of claim 1 wherein said active electrode is smaller in size than is said dispersive electrode.
Claim 17
Dependent Claim
28 words
The method of claim 1 wherein said predetermined polarity of said applied high intensity pulses of electrical energy have a negative polarity to cause debriding of said wound.
Claim 18
Dependent Claim
25 words
The method of claim 18 wherein said applied high intensity pulses of negative polarity also cause reduction of edema while said wound is being debrided.
Claim 19
Independent Claim
200 words
A method for enhancing soft tissue wound healing utilizing pulsed electrical stimulation, said method comprising: positioning an active electrode at a wound to be treated so that said active electrode is contiguous to said wound to be treated; positioning a dispersive electrode at the body having said wound thereon with said dispersive electrode being spaced from said wound to treated so that said dispersive electrode engages said body at a position spaced from said wound to be treated; applying substantially rectangular pulses of electrical energy of negative polarity and having a high intensity of at least 2.8 microcoulombs per pulse through said active electrode to said wound during repeated intervals with said intervals being of timewise short duration relative to the elapsed time between application of said pulses; and applying substantially rectangular pulses of electrical energy of positive polarity and having a high intensity of at least 2.8 microcoulombs per pulse through said active electrode to said wound during repeated intervals with said intervals being of timewise short duration relative to the elapsed time between application of said pulses, and with said positive polarity pulses being applied after said negative polarity pulses have been applied for a preselected time period.
Claim 20
Independent Claim
200 words
A method for enhancing soft tissue wound healing utilizing pulsed electrical stimulation, said method comprising: positioning an active electrode at a wound to be treated so that said active electrode is contiguous to said wound to be treated; positioning a dispersive electrode at the body having said wound thereon with said dispersive electrode being spaced from said wound to treated so that said dispersive electrode engages said body at a position spaced from said wound to be treated; applying substantially rectangular pulses of electrical energy of negative polarity and having a high intensity of at least 2.8 microcoulombs per pulse through said active electrode to said wound during repeated intervals with said intervals being of timewise short duration relative to the elapsed time between application of said pulses; and applying substantially rectangular pulses of electrical energy of positive polarity and having a high intensity of at least 2.8 microcoulombs per pulse through said active electrode to said wound during repeated intervals with said intervals being of timewise short duration relative to the elapsed time between application of said pulses, and with said positive polarity pulses being applied after said negative polarity pulses have been applied for a preselected time period.
Claim 21
Dependent Claim
34 words
The method of claim 18 wherein said negative and positive pulses are applied for substantially equal time intervals, and wherein said elapsed times between application of said negative and positive pulses are substantially equal.
Claim 22
Dependent Claim
33 words
The method of claim 18 wherein said step of applying negative pulses and said step of applying positive pulses form a treatment cycle, and wherein said treatment cycle is repeated at least once.
Claim 23
Dependent Claim
74 words
The method of claim 18 wherein said applied negative and applied positive pulses are caused to be applied at a rate of between about 32 and 128 pulses per second at an intensity of between about 2.8 and 7 microcoulombs per pulse and are applied for between about 15 and 45 minutes during each treatment interval, with said treatment intervals being caused to occur between about two and four times during a treatment period.
Claim 24
Dependent Claim
28 words
The method of claim 21 wherein said applied negative and positive pulses are applied as constant current pulses having an intensity of between about 20 and 50 milliamperes.
Claim 25
Dependent Claim
56 words
The method of claim 18 wherein said applied negative and positive pulses are caused to be applied at a rate of about 128 pulses per second and at an intensity of about 5 microcoulombs per pulse for an interval of about 30 minutes twice a day with about a four hour period between applied pulse intervals.
Claim 26
Dependent Claim
25 words
The method of claim 23 wherein said applied negative and positive pulses are applied as constant current pulses having an intensity of about 35 milliamperes.
Claim 27
Dependent Claim
35 words
The method of claim 18 wherein each of said negative and positive pulses cause a voltage through said body between said active electrode and said dispersive electrode of between about 10 to 30 volts peak.
Claim 28
Dependent Claim
20 words
The method of claim 18 wherein said repeated intervals of application of said negative pulses causes debriding of said wound.
Claim 29
Dependent Claim
18 words
The method of claim 26 wherein said cycle of treatment is repeated until wound healing is substantially completed.
Claim 30
Independent Claim
138 words
A method for enhancing soft tissue wound healing utilizing pulsed electrical stimulation, said method comprising: applying negative pulses to a soft tissue wound at a rate of between about 32 and 128 pulses per second at high intensity intensity of between about 2.8 and 7.0 microcoulombs per pulse for an interval of between 15 and 45 minutes with the negative pulses being applied about twice to four times a day for a predetermined period of time; later applying positive pulses to said soft tissue wound at a rate and intensity and for a time interval and period of time substantially the same as that of said negative pulse applications, with said application of said negative pulses followed by said application of said positive pulses being a cycle of treatment; and repeating said cycle of treatment at least once.
Claim 31
Independent Claim
138 words
A method for enhancing soft tissue wound healing utilizing pulsed electrical stimulation, said method comprising: applying negative pulses to a soft tissue wound at a rate of between about 32 and 128 pulses per second at high intensity intensity of between about 2.8 and 7.0 microcoulombs per pulse for an interval of between 15 and 45 minutes with the negative pulses being applied about twice to four times a day for a predetermined period of time; later applying positive pulses to said soft tissue wound at a rate and intensity and for a time interval and period of time substantially the same as that of said negative pulse applications, with said application of said negative pulses followed by said application of said positive pulses being a cycle of treatment; and repeating said cycle of treatment at least once.
Claim 32
Dependent Claim
27 words
The method of claim 28 wherein said negative and positive pulses are applied as constant current pulses having an intensity of between about 20 and 50 milliamperes.
Claim 33
Dependent Claim
17 words
The method of claim 29 wherein said constant current pulses have an intensity of about 35 milliamperes.
Claim 34
Dependent Claim
45 words
The method of claim 28 wherein said negative and positive pulses are applied at a rate of about one of 64 and 128 pulses per second at an intensity of about 5 microcoulombs per pulse for an interval of about 30 minutes twice a day.
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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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |