US5284153A
Expired / Lapsed
US
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Method for locating a nerve and for protecting nerves from injury during surgery
Assignee: The Brigham and Women's Hospital Inc
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Filing: 1992-04-14
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Granted: 1994-02-08
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Expires: 2012-04-14
Abstract
Abstract The present invention is directed to a method and apparatus for locating and identifying the function of specific peripheral nerves. In one embodiment, the present invention takes the form of a nerve stimulator which is used to locate nerves to assist in the administration of regional anesthesia. In another embodiment, the nerve stimulator is used to locate, identify the function of, and guard against the inadvertent cutting of specific nerves during surgical procedures. The apparatus of the present invention includes a stimulus delivery means, a response-detecting means and a means for automatically modulating the magnitude of the stimulus.
Inventors
- 👤 Stephen A. Raymond
- 👤 Gary R. Strichartz
- 👤 James H. Philip
- 👤 Daniel B. Raemer
- 👤 Martyn A. Vickers, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:08
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/48; A61B5/4887; A61B5/4893; A61B5/05; A61B5/40; A61B5/4029; A61B5/4041; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/36014; A61N1/36021; A61B17/00; A61B17/34; A61B17/3401; A61B5/72; A61B5/7203; A61B5/7217
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
163 words
A method for locating a nerve comprising the steps of: (a) delivering a stimulus to a nerve using a stimulus delivery means; (b) detecting the response of said nerve to said stimulus using a response detecting means; (c) determining the distance of said nerve from said stimulus delivery means by comparing the response of said nerve to said stimulus against a predetermined criterion; (d) modifying the next stimulus to be delivered to said nerve, wherein said next stimulus is automatically modified by a control means which continually modifies the next stimulus delivered to said nerve based on the response of the nerve to the previously delivered stimulus so as to hold the level of the nerve's response substantially constant at a predetermined value; (e) conveying to the user the distance between said stimulus delivery means and said nerve; (f) repositioning said stimulus delivery means in relation to said nerve; and (g) delivering said next stimulus to said nerve using said stimulus delivery means.
Claim 2
Independent Claim
163 words
A method for locating a nerve comprising the steps of: (a) delivering a stimulus to a nerve using a stimulus delivery means; (b) detecting the response of said nerve to said stimulus using a response detecting means; (c) determining the distance of said nerve from said stimulus delivery means by comparing the response of said nerve to said stimulus against a predetermined criterion; (d) modifying the next stimulus to be delivered to said nerve, wherein said next stimulus is automatically modified by a control means which continually modifies the next stimulus delivered to said nerve based on the response of the nerve to the previously delivered stimulus so as to hold the level of the nerve's response substantially constant at a predetermined value; (e) conveying to the user the distance between said stimulus delivery means and said nerve; (f) repositioning said stimulus delivery means in relation to said nerve; and (g) delivering said next stimulus to said nerve using said stimulus delivery means.
Claim 3
Dependent Claim
10 words
The method of claim 1, wherein steps b-g are repeated.
Claim 4
Dependent Claim
26 words
The method of claim 1, wherein steps b-g are repeated until the output of said response detecting means reaches either a predetermined upper or lower limit.
Claim 5
Dependent Claim
20 words
The method of claim 1, wherein steps b-g are repeated until said next stimulus is modified to a maximum value.
Claim 6
Dependent Claim
20 words
The method of claim 1, wherein steps b-g are repeated until said next stimulus is modified to a minimum value.
Claim 7
Dependent Claim
47 words
The method of claim 5, further comprising the step of holding said next stimulus substantially at said minimum value, wherein said minimum value has previously been shown to correspond to an interpretable state such as the stimulus delivery means being within a certain distance of the nerve.
Claim 8
Dependent Claim
14 words
The method of claim 5, wherein said stimulus delivery means is a hypodermic needle.
Claim 9
Dependent Claim
16 words
The method of claim 7, further comprising the step of injecting a drug through said needle.
Claim 10
Dependent Claim
15 words
The method of claim 1, wherein said control means modifies the intensity of said stimulus.
Claim 11
Dependent Claim
22 words
The method of claim 1, wherein the distance between said stimulus delivery means and the nerve is conveyed by an audible tone.
Claim 12
Dependent Claim
17 words
The method of claim 1, wherein said response detecting means comprises at least one pair of electrodes.
Claim 13
Dependent Claim
13 words
The method of claim 1, wherein said nerve is a mixed peripheral nerve.
Claim 14
Dependent Claim
14 words
The method of claim 12, wherein said mixed peripheral nerve is the sciatic nerve.
Claim 15
Dependent Claim
14 words
The method of claim 1, wherein said stimulus delivery means is a hypodermic needle.
Claim 16
Dependent Claim
15 words
The method of claim 1, wherein said control means modifies the duration of said stimulus.
Claim 17
Dependent Claim
15 words
The method of claim 1, wherein said control means modifies the frequency of said stimulus.
Claim 18
Dependent Claim
12 words
The method of claim 1, wherein said nerve is a pelvic nerve.
Claim 19
Dependent Claim
14 words
The method of claim 17, wherein said response detecting means is a tumescence monitor.
Claim 20
Dependent Claim
14 words
The method of claim 18, wherein said stimulus delivery means is a surgical instrument.
References Cited (Backward Citations)
US2704064A
Cited
US3364929A
Cited
US3664329A
Cited
US3641993A
Cited
US3672162A
Cited
US3830226A
Cited
US4207897A
Cited
US4099519A
Cited
US4103678A
Cited
US4291705A
Cited
US4542753A
Cited
US4515166A
Cited
US4515168A
Cited
US4585005A
Cited
US4811742A
Cited
US4817628A
Cited
US4777952A
Cited
US4848361A
Cited
US4892105A
Cited
US4815475A
Cited
US4926865A
Cited
US5007902A
Cited
US4913162A
Cited
US4928706A
Cited
US4949721A
Cited
US4909263A
Cited
US4977895A
Cited
US4962766A
Cited
US5125406A
Cited
US5020542A
Cited
US5131401A
Cited
US5092344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |