Patent US5234438A successfully refreshed from Google Patents.
US5234438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for creating new tunnels in tissue
Assignee: Individual
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Filing: 1992-08-03
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Granted: 1993-08-10
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Expires: 2012-08-03
Abstract
Abstract A process for tunneling in tissue to install catheters and the like includes insertion of a hollow needle through the skin and, exiting from the skin as limited by the length of the needle or the catheter to be installed. A suture is then fed through the needle after which pulling tip of diameter approximately the same as the catheter to be installed, is selected and the suture attached to the distal end of the pulling tip. The catheter is then fastened to the proximal end of the pulling tip and the free end of the suture pulled to pull the catheter through the tunnel defined by the suture. The needle and suture may be inserted successively a number of times if a longer catheter is to be installed and the pulling tip and catheter pulled through the tissue. A similar procedure may be implemented using a solid needle with a swaged-on suture.
Inventors
- 👤 Neal Semrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:17
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/0194; A61M25/0067; A61M25/0068; A61M25/0069; A61M25/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
129 words
A process for tunneling in tissue to install catheters and the like comprising the steps of: a) inserting a needle through the skin and into the tissue for the length desired as limited by the length of said needle and exiting from the skin and causing a length of suture to follow the path of said needle through said tissue and exiting from the skin; b) selecting a pulling tip of diameter appropriate to the catheter to be installed and fastening said suture to the distal end of said pulling tip; c) fastening said catheter to the proximal end of said pulling tip; and d) pulling said suture to cause said pulling tip and said catheter to tunnel through the tissue as established by the path of said suture.
Claim 2
Dependent Claim
129 words
A process for tunneling in tissue to install catheters and the like comprising the steps of: a) inserting a needle through the skin and into the tissue for the length desired as limited by the length of said needle and exiting from the skin and causing a length of suture to follow the path of said needle through said tissue and exiting from the skin; b) selecting a pulling tip of diameter appropriate to the catheter to be installed and fastening said suture to the distal end of said pulling tip; c) fastening said catheter to the proximal end of said pulling tip; and d) pulling said suture to cause said pulling tip and said catheter to tunnel through the tissue as established by the path of said suture.
Claim 3
Dependent Claim
44 words
A process as claimed in claim 1 wherein following step a), said needle is reinserted at its previous exit point and caused to exit at a new location and said suture is again caused to follow the path of said needle through the tissue.
Claim 4
Dependent Claim
58 words
A process as claimed in claim 2 wherein said needle and suture are reinserted into the tissue as many times as required by the length of the catheter to be installed and said suture is pulled to pull the pulling tip and catheter through the tissue such that the desired length of catheter is tunneled through the tissue.
Claim 5
Dependent Claim
22 words
A process as claimed in claim 1 wherein said suture is swaged to said needle and follows said needle through said tissue.
Claim 6
Dependent Claim
127 words
A process for tunneling in tissue to install catheters and the like comprising the steps of: a) inserting a hollow needle through the skin and into the tissue for the length desired a limited by needle length and exiting from the skin; b) feeding a length of suture through the needle such that it extends out of the tissue on both ends; c) removing said needle; d) selecting a pulling tip appropriate to the catheter to be installed and fastening said suture the distal end of said pulling tip; e) fastening said catheter to the proximal end of said pulling tip; and f) pulling said suture to cause said pulling tip and said catheter to tunnel through the tissue as established by the path of said suture.
Claim 7
Dependent Claim
127 words
A process for tunneling in tissue to install catheters and the like comprising the steps of: a) inserting a hollow needle through the skin and into the tissue for the length desired a limited by needle length and exiting from the skin; b) feeding a length of suture through the needle such that it extends out of the tissue on both ends; c) removing said needle; d) selecting a pulling tip appropriate to the catheter to be installed and fastening said suture the distal end of said pulling tip; e) fastening said catheter to the proximal end of said pulling tip; and f) pulling said suture to cause said pulling tip and said catheter to tunnel through the tissue as established by the path of said suture.
Claim 8
Dependent Claim
53 words
A process as claimed in claim 5 wherein following step c),: said needle is reinserted at its previous exit point and caused to exit at a new location and the suture reinserted through the needle such that the needle and suture exit the tissue at said new location; and said needle is removed.
Claim 9
Dependent Claim
67 words
A process as claimed in claim 6 wherein said needle is reinserted into the tissue and the suture fed through the needle and the needle removed as many times as required by the length of the catheter to be inserted and said suture is pulled to pull the pulling tip and catheter through the tissue such that the desired length of catheter is tunneled through the tissue.
Claim 10
Dependent Claim
123 words
For use in creating tunnels in a patient's tissue for installation of catheters or other similar sized devices wherein a suture has been fed through the tissue by any suitable means; a pulling tip of generally cylindrical cross section and of diameter approximating that of the catheter or other device to be installed in the tissue, said pulling tip being sharply tapered toward the distal end and of sufficient stiffness to penetrate and tunnel through the tissue, and including means to which said suture is attached, the proximal end of said pulling tip including fastening means for attaching said catheter thereto, whereby said pulling tip and said catheter or similar device may be pulled through and installed in a tunnel in said tissue.
Claim 11
Dependent Claim
123 words
For use in creating tunnels in a patient's tissue for installation of catheters or other similar sized devices wherein a suture has been fed through the tissue by any suitable means; a pulling tip of generally cylindrical cross section and of diameter approximating that of the catheter or other device to be installed in the tissue, said pulling tip being sharply tapered toward the distal end and of sufficient stiffness to penetrate and tunnel through the tissue, and including means to which said suture is attached, the proximal end of said pulling tip including fastening means for attaching said catheter thereto, whereby said pulling tip and said catheter or similar device may be pulled through and installed in a tunnel in said tissue.
Claim 12
Dependent Claim
28 words
A pulling tip as claimed in claim 8 wherein said means for attaching said suture includes an eye or port in the distal end of said pulling tip.
Claim 13
Dependent Claim
21 words
A pulling tip as claimed in claim 8 wherein said suture is swaged to the distal end of said pulling tip.
Claim 14
Dependent Claim
27 words
A pulling tip as claimed in claim 8 wherein said pulling tip includes a socket at its proximal end and said catheter is fastened in said socket.
Claim 15
Dependent Claim
34 words
A pulling tip as claimed in claim 8 wherein said fastening means includes means formed on the exterior of the proximal end of said pulling tip for securing said catheter to said pulling tip.
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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) | 1996-08-09 | 1997-02-08 | 1997-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-09 | 2001-02-08 | 2001-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-09 | 2005-02-08 | 2005-08-10 | $7700.00 | Window Closed / Lapsed |