Patent US3681752A successfully refreshed from Google Patents.
Patent US5895353A successfully refreshed from Google Patents.
US5895353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vessel isolating retractor cannula and method
Assignee: Maquet Cardiovascular LLC
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Filing: 1998-06-22
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Granted: 1999-04-20
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Expires: 2018-06-22
Abstract
Abstract A retractor and a surgical tool are positioned within a cannula, and a dissection cradle of the retractor is positioned at the distal end of the cannula. The retractor includes a first portion with an axis approximately parallel to the axis of the cannula and a second portion with an axis at an angle to the axis of the cannula. The dissection cradle is located at the distal end of the second portion of the retractor, and may include two substantially parallel, spaced legs with the retractor shaped in a loop between and in a plane skewed relative to the axis of the legs, and with the loop directed away from the surgical tool. Thus, in operation, when the surgeon locates a vein and side branch of interest, the surgeon extends the retractor to cradle the vein in the dissection cradle. Once cradled, the retractor may be fully extended to urge the vein away from the axis of the cannula isolate the side branch for exposure to the surgical tool. In another embodiment, the cannula includes a sheath which encases the curved, resilient retractor at a first position to retain the retractor in substantially straight orientation, and which encases the retractor at a second position that allows the retractor to extend at an angle relative to the axis of the cannula.
Inventors
- 👤 John P. Lunsford
- 👤 Charles Gresl, Jr.
- 👤 Albert K. Chin
- 👤 John W. Davis
- 👤 Tenny Chang
- 👤 Jeffrey W. Baxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:42
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/02; A61B17/0218; A61B1/00; A61B1/313; A61B17/00008
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
198 words
A surgical apparatus comprising: an elongated cannula having a central axis between distal and proximal ends; and a retractor, slidably supported by the cannula for translational movement substantially aligned with the central axis and having a first portion disposed near the proximal end of the cannula and a second portion disposed near the distal end of the cannula, the second portion having a dissection cradle positioned at the distal end of the second portion and projecting away from the central axis of the cannula upon slidable extension thereof forward of the distal end of the cannula, the retractor further comprising two legs, and the dissection cradle is formed between the two legs having substantially parallel axes at the distal end of the retractor in the shape of a loop positioned in a plane skewed relative to the axes of the legs, and a portion of the loop between the two legs is directed away from the central axis of the cannula, and the portion of the retractor forming the loop of the dissection cradle is substantially flattened, and wherein the thickness of the portion of the cradle forming the loop is less than the width of the legs.
Claim 2
Dependent Claim
198 words
A surgical apparatus comprising: an elongated cannula having a central axis between distal and proximal ends; and a retractor, slidably supported by the cannula for translational movement substantially aligned with the central axis and having a first portion disposed near the proximal end of the cannula and a second portion disposed near the distal end of the cannula, the second portion having a dissection cradle positioned at the distal end of the second portion and projecting away from the central axis of the cannula upon slidable extension thereof forward of the distal end of the cannula, the retractor further comprising two legs, and the dissection cradle is formed between the two legs having substantially parallel axes at the distal end of the retractor in the shape of a loop positioned in a plane skewed relative to the axes of the legs, and a portion of the loop between the two legs is directed away from the central axis of the cannula, and the portion of the retractor forming the loop of the dissection cradle is substantially flattened, and wherein the thickness of the portion of the cradle forming the loop is less than the width of the legs.
Claim 3
Dependent Claim
138 words
A surgical apparatus comprising: an elongated cannula having a central axis between distal and proximal ends; and a retractor, slidably supported by the cannula for translational movement substantially aligned with the central axis and having a first portion disposed near the proximal end of the cannula and a second portion disposed near the distal end of the cannula, the second portion having a dissection cradle positioned at the distal end of the second portion and projecting away from the central axis of the cannula upon slidable extension thereof forward of the distal end of the cannula, wherein the retractor includes one leg, and the dissection cradle is formed with respect to the one leg of the retractor, and comprises a stopper, disposed on the distal end of the retractor for guiding a target vessel in the dissection cradle.
Claim 4
Dependent Claim
138 words
A surgical apparatus comprising: an elongated cannula having a central axis between distal and proximal ends; and a retractor, slidably supported by the cannula for translational movement substantially aligned with the central axis and having a first portion disposed near the proximal end of the cannula and a second portion disposed near the distal end of the cannula, the second portion having a dissection cradle positioned at the distal end of the second portion and projecting away from the central axis of the cannula upon slidable extension thereof forward of the distal end of the cannula, wherein the retractor includes one leg, and the dissection cradle is formed with respect to the one leg of the retractor, and comprises a stopper, disposed on the distal end of the retractor for guiding a target vessel in the dissection cradle.
References Cited (Backward Citations)
US3313294A
Cited
US3857386A
Cited
US4190042A
Cited
US4428746A
Cited
US4874375A
Cited
US5251613A
Cited
US5275608A
Cited
US5337736A
Cited
US5558620A
Cited
US5450842A
Cited
US5501654A
Cited
US5512037A
Cited
US5690606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-04-19 | 2002-10-19 | 2003-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-19 | 2006-10-19 | 2007-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-19 | 2010-10-19 | 2011-04-20 | $7700.00 | Window Closed / Lapsed |