US6162170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices and methods for percutaneous surgery
Assignee: SDGI Holdings Inc
•
Filing: 1999-01-20
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Granted: 2000-12-19
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Expires: 2019-01-20
Abstract
Abstract A method for percutaneous surgery on the spine of a patient under direct visualization is performed through a single cannula having a predetermined length. The length is determined by measuring a distance from the lamina of a spinal vertebra to the skin of the patient, determining a first portion of the length to be less than the measured distance, and determining a second portion of the length to be about one fourth (1/4) the length of the first portion. The first portion is the length of the cannula to be introduced into the patient and the second portion extends external to the patient. This length is preferably 5.5 to 7.0 times greater than the transverse dimension of the cannula. Such dimensions for the cannula permits the longitudinal axis of a tool to be angled between 5 degrees and 8 degrees with respect to the longitudinal axis of the cannula.
Inventors
- 👤 Kevin Thomas Foley
- 👤 Maurice Mell Smith
- 👤 John B. Clayton
- 👤 Joseph Moctezuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:50
CPC Classifications
A; A61; A61M; A61M29/00; A61B; A61B17/00; A61B17/34; A61B17/3417; A61B17/3421; A61B17/16; A61B17/1662; A61B17/1671; A61B17/00234; A61B2017/00238; A61B2017/00261; A61B2017/00292; A61B2017/00296; A61B2017/0046; A61B2017/00469; A61B2017/00477; A61B2017/3445; A61B2017/347; A61B90/00; A61B90/06; A61B2090/062; A61B90/30; A61B2090/306; A61B90/36; A61B90/361; A61B2090/3614; A61B90/37; A61B2090/373; A61B90/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
112 words
A method for manufacturing an apparatus for use in percutaneous surgery on the spine of a patient, comprising the steps of: (a) measuring a distance from the lamina of a spinal vertebra to the skin of the patient; (b) determining a first portion of a length of a cannula to be less than the distance measured in step (a), the first portion for introduction into the patient; (c) determining a second portion of the length of the cannula to be about one-fourth (1/4) of the length of the first portion, the second portion external to the patient; and (d) providing the cannula having the length determined according to steps (b) and (c).
Claim 2
Independent Claim
112 words
A method for manufacturing an apparatus for use in percutaneous surgery on the spine of a patient, comprising the steps of: (a) measuring a distance from the lamina of a spinal vertebra to the skin of the patient; (b) determining a first portion of a length of a cannula to be less than the distance measured in step (a), the first portion for introduction into the patient; (c) determining a second portion of the length of the cannula to be about one-fourth (1/4) of the length of the first portion, the second portion external to the patient; and (d) providing the cannula having the length determined according to steps (b) and (c).
Claim 3
Dependent Claim
19 words
The method according to claim 1, wherein the cannula includes a circular cross-section along the length of the cannula.
Claim 4
Dependent Claim
19 words
The method according to claim 1, wherein the length of the second portion is less than about 30 millimeters.
Claim 5
Dependent Claim
59 words
The method according to claim 1, further comprising: (e) providing a tool having an elongated shaft and a longitudinal axis extending therethrough, wherein the cannula provided in step (d) includes a working channel that permits the longitudinal axis of the tool to be angled between 5 degrees and 8 degrees with respect to a longitudinal axis of the cannula.
Claim 6
Dependent Claim
39 words
The method according to claim 1, wherein the cannula has a dimension transverse to its length, and further comprising: (e) determining the length of the cannula to also be between 5.5 to 7.0 times greater than the transverse dimension.
Claim 7
Independent Claim
104 words
A method for performing percutaneous surgery on the spine of a patient, comprising the steps of: (a) measuring a distance from a spinal body to the skin of the patient; (b) determining a first portion of a length of a cannula to be less than the distance measured in step (a), the first portion for introduction into the patient; (c) determining a second portion of the length of the cannula to be about one-fourth (1/4) of the length of the first portion, the second portion external to the patient; and (d) providing the cannula having the length determined according to steps (b) and (c).
Claim 8
Independent Claim
104 words
A method for performing percutaneous surgery on the spine of a patient, comprising the steps of: (a) measuring a distance from a spinal body to the skin of the patient; (b) determining a first portion of a length of a cannula to be less than the distance measured in step (a), the first portion for introduction into the patient; (c) determining a second portion of the length of the cannula to be about one-fourth (1/4) of the length of the first portion, the second portion external to the patient; and (d) providing the cannula having the length determined according to steps (b) and (c).
Claim 9
Dependent Claim
19 words
The method according to claim 6, wherein the cannula includes a circular cross-section along the length of the cannula.
Claim 10
Dependent Claim
19 words
The method according to claim 6, wherein the length of the second portion is less than about 30 millimeters.
Claim 11
Dependent Claim
59 words
The method according to claim 6, further comprising: (e) providing a tool having an elongated shaft and a longitudinal axis extending therethrough, wherein the cannula provided in step (d) includes a working channel permitting the longitudinal axis of the tool shaft to be angled between 5 degrees and 8 degrees with respect to a longitudinal axis of the cannula.
Claim 12
Dependent Claim
38 words
The method according to claim 6, wherein the cannula has a dimension transverse to its length, and further comprising determining the length of the cannula to also be between 5.5 to 7.0 times greater than the transverse dimension.
Claim 13
Dependent Claim
19 words
The method according to claim 6, wherein step (a) includes measuring the distance from the lamina to the skin.
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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) | 2003-12-19 | 2004-06-19 | 2004-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-19 | 2008-06-19 | 2008-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-19 | 2012-06-19 | 2012-12-19 | $7700.00 | Window Closed / Lapsed |