US4693250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for dilating puncture site in the renal pelvis
Assignee: Cook Inc
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Filing: 1986-01-29
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Granted: 1987-09-15
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Expires: 2006-01-29
Abstract
Abstract A renal tissue puncture site dilator with grooves in the jaws to receive a wire guide. The renal tissue dilator is a scissor-like surgical instrument, similar to a clamp, with jaws that have a triangular cross section to aid in tearing of tissue. The grooves in the jaws form a channel beginning at the tips of the jaws and exiting the jaws through the side of the jaws. This channel has a circular cross section, designed to slidably receive a wire guide. A needle is inserted into the renal tissue and a wire guide is threaded into the needle. The needle is removed. The instrument is threaded onto the wire guide and moved into the puncture site. The puncture site is dilated by opening the jaws of the clamp thereby tearing the renal tissue. The dilated tissue may be further dilated by rotating the clamp approximately 90° and again opening the jaws of the clamp to tear the renal tissue further. The turning of the clamp and opening of the jaws to enlarge the puncture in renal tissue is continued until an opening of appropriate size is obtained.
Inventors
- 👤 Harold G. Coons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:20
CPC Classifications
A; A61; A61M; A61M29/00; A61M29/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A process for dilating a puncture site in tissue to allow for insertion of instruments therein, comprising the steps of: inserting a wire guide in a puncture in tissue; inserting the wire guide in a clamp having jaws with a channel defined therein for receipt of the wire guide; sliding the clamp with the wire guide therein along the wire guide until the jaws of the clamp are through the tissue; enlarging the puncture in the tissue by opening the jaws of the clamp.
Claim 2
Dependent Claim
84 words
A process for dilating a puncture site in tissue to allow for insertion of instruments therein, comprising the steps of: inserting a wire guide in a puncture in tissue; inserting the wire guide in a clamp having jaws with a channel defined therein for receipt of the wire guide; sliding the clamp with the wire guide therein along the wire guide until the jaws of the clamp are through the tissue; enlarging the puncture in the tissue by opening the jaws of the clamp.
Claim 3
Dependent Claim
43 words
A process for dilating a puncture site as described in claim 1, further comprising the steps of: rotating the clamp that has its jaws inserted through the enlarged puncture; and then further enlarging the puncture by again opening the jaws of the clamp.
Claim 4
Dependent Claim
26 words
A process for dilating a puncture site as described in claim 2, further comprising repeating the steps of claim 9 until the puncture is appropriately enlarged.
Claim 5
Dependent Claim
36 words
A process for dilating a puncture site in tissue to allow for insertion of instruments therein, as described in claim 3, additionally comprising the step of inserting a needle to form the puncture in the tissue.
Claim 6
Dependent Claim
61 words
A process for dilating a puncture site in tissue to allow for insertion of instruments therein, comprising the steps of: sliding a clamp having jaws with a channel defined therein for receipt of the wire guide along a wire guide inserted in a puncture in tissue until the jaws are within the puncture; and, enlarging the puncture by opening the jaws.
Claim 7
Dependent Claim
61 words
A process for dilating a puncture site in tissue to allow for insertion of instruments therein, comprising the steps of: sliding a clamp having jaws with a channel defined therein for receipt of the wire guide along a wire guide inserted in a puncture in tissue until the jaws are within the puncture; and, enlarging the puncture by opening the jaws.
Claim 8
Dependent Claim
44 words
A process for dilating a puncture site in tissue to allow for insertion of instruments therein, as described in claim 5, additionally comprising the steps of: puncturing the tissue with a needle to define the puncture; and, inserting a wire guide in the puncture.
Claim 9
Dependent Claim
38 words
A process for dilating a puncture site in tissue to allow for insertion of instruments therein, as described in claim 5, further comprising the step of inserting the wire guide in the clamp prior to said sliding step.
Claim 10
Dependent Claim
52 words
A process for dilating a puncture site in tissue to allow for insertion of instruments therein, as described in claim 7, further comprising the steps of: rotating the clamp that has its jaws inserted through the enlarged puncture; and then further enlarging the puncture by again opening the jaws of the clamp.
Claim 11
Dependent Claim
26 words
A process for dilating a puncture site, as described in claim 8, further comprising repeating the steps of claim 8 until the puncture is appropriately enlarged.
References Cited (Backward Citations)
US474130A
Cited
US673598A
Cited
US762743A
Cited
CH36108A
Cited
US1097978A
Cited
US1328624A
Cited
US1340501A
Cited
US1592836A
Cited
US3143114A
Cited
US3446211A
Cited
US4034746A
Cited
US4449532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |