US5084024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter and method for relieving catheter stress
Assignee: Thermo Fisher Scientific Inc
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Filing: 1989-12-07
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Granted: 1992-01-28
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Expires: 2009-12-07
Abstract
Abstract An improved catheter and catheter system for long term implantation in a patient through a percutaneous access device are provided. The improved catheter has a loop in an external lead portion of the catheter which reduces bending, kinking, and cracking of the catheter and which reduces stress on the catheter and on the percutaneous access device as well. The system employs multiple catheters, each catheter having a loop to reduce stress. Each of the catheters of the system may have a single lumen or multiple lumens. A method of relieving stress at an external lead portion of a single or multi-lumen catheter is also provided.
Inventors
- 👤 Steven M. Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:55
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/0247; A61M25/00; A61M25/0021; A61M25/0041; A61M2039/0273; A61M2039/0282
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
151 words
An improved system for the introduction of fluids or electrical leads to a patient, said system comprising: a percutaneous access device including a skirt for embedding in the subcutaneous tissue of the patient and a neck extending from the skirt for extending through the dermal and epidermal layers of the skin of the patient, said neck having a bore therethrough; and a catheter comprising a thermoset or thermoplastic tube defining an internal lumen, said tube having an outer diameter sized to permit insertion of the tube through said bore and having a proximal end for placement in the patient and a distal end located external to the patient when the catheter is in use, said tube also having a permanent loop with an arc of at least 90° toward its distal end at a portion of the catheter which is just external to the patient when the catheter is in place.
Claim 2
Dependent Claim
151 words
An improved system for the introduction of fluids or electrical leads to a patient, said system comprising: a percutaneous access device including a skirt for embedding in the subcutaneous tissue of the patient and a neck extending from the skirt for extending through the dermal and epidermal layers of the skin of the patient, said neck having a bore therethrough; and a catheter comprising a thermoset or thermoplastic tube defining an internal lumen, said tube having an outer diameter sized to permit insertion of the tube through said bore and having a proximal end for placement in the patient and a distal end located external to the patient when the catheter is in use, said tube also having a permanent loop with an arc of at least 90° toward its distal end at a portion of the catheter which is just external to the patient when the catheter is in place.
Claim 3
Dependent Claim
11 words
The improved system of claim 1 wherein said loop is heat-set.
Claim 4
Dependent Claim
28 words
The improved system of claim 1 wherein a remaining external portion of said tube, proximal to said external portion having said loop, may be oriented in any direction.
Claim 5
Dependent Claim
13 words
The improved system of claim 1 wherein said arc is at least 180°.
Claim 6
Dependent Claim
13 words
The improved system of claim 1 wherein said system is a multi-lumen catheter.
Claim 7
Dependent Claim
21 words
The improved system of claim 1 further comprising electrical conductors running through the lumen of said catheter for delivery of electricity.
Claim 8
Dependent Claim
18 words
The improved system of claim 1 wherein said loop has a radius of curvature of at least 3/16".
Claim 9
Dependent Claim
23 words
The improved system of claim 7 wherein said catheter has an inner diameter of 0.104 inches and an outer diameter of 0.165 inches.
Claim 10
Dependent Claim
156 words
An improved system for the introduction of fluids or electrical leads to a patient, said system comprising: a percutaneous access device including a skirt for embedding in the subcutaneous tissue of the patient and a neck extending from the skirt for extending through the dermal and epidermal layers of the skin or the patient, said neck having a bore therethrough; and a catheter comprising at least two thermoplastic tubes each defining an internal lumen, each of said tubes having an outer diameter sized to permit insertion of the tube through said bore and having a proximal end for placement in the patient and a distal end located external to the patient when the catheter is in use, each of said tubes also having a permanent loop with an arc of at least 90° toward its distal end at a portion of the tube which is just external to the patient when the system is in place.
Claim 11
Dependent Claim
156 words
An improved system for the introduction of fluids or electrical leads to a patient, said system comprising: a percutaneous access device including a skirt for embedding in the subcutaneous tissue of the patient and a neck extending from the skirt for extending through the dermal and epidermal layers of the skin or the patient, said neck having a bore therethrough; and a catheter comprising at least two thermoplastic tubes each defining an internal lumen, each of said tubes having an outer diameter sized to permit insertion of the tube through said bore and having a proximal end for placement in the patient and a distal end located external to the patient when the catheter is in use, each of said tubes also having a permanent loop with an arc of at least 90° toward its distal end at a portion of the tube which is just external to the patient when the system is in place.
Claim 12
Dependent Claim
11 words
The improved system of claim 9 wherein said loop is heat-set.
Claim 13
Dependent Claim
28 words
The improved system of claim 9 wherein a remaining external portion of said tube, proximal to said external portion having said loop, may be oriented in any direction.
Claim 14
Dependent Claim
13 words
The improved system of claim 9 wherein said arc is at least 180°.
Claim 15
Dependent Claim
13 words
The improved system of claim 9 wherein said catheter is a multi-lumen catheter.
Claim 16
Dependent Claim
21 words
The improved system of claim 9 further comprising electrical conductors running through the lumen of said catheter for delivery of electricity.
Claim 17
Dependent Claim
18 words
The improved system of claim 9 wherein said loop has a radius of curvature of at least 3/16".
Claim 18
Dependent Claim
23 words
The improved system of claim 15 wherein said catheter has an inner diameter of 0.104 inches and an outer diameter of 0.165 inches.
Claim 19
Dependent Claim
149 words
An improved system for the introduction of fluids or electrical leads to a patient, said system comprising: a percutaneous access device including a skirt for embedding in the subcutaneous tissue of the patient and a neck extending from the skirt for extending through the dermal and epidermal layers of the skin of the patient, said neck having a bore therethrough; and a catheter comprising a thermoset tube defining an internal lumen, said tube having an outer diameter sized to permit insertion of the tube through said bore and having a proximal end for placement in the patient and a distal end located external to the patient when the catheter is in use, said tube also having a permanent loop with an arc of at least 90° toward its distal end at a portion of the catheter which is just external to the patient when the catheter is in place.
Claim 20
Dependent Claim
149 words
An improved system for the introduction of fluids or electrical leads to a patient, said system comprising: a percutaneous access device including a skirt for embedding in the subcutaneous tissue of the patient and a neck extending from the skirt for extending through the dermal and epidermal layers of the skin of the patient, said neck having a bore therethrough; and a catheter comprising a thermoset tube defining an internal lumen, said tube having an outer diameter sized to permit insertion of the tube through said bore and having a proximal end for placement in the patient and a distal end located external to the patient when the catheter is in use, said tube also having a permanent loop with an arc of at least 90° toward its distal end at a portion of the catheter which is just external to the patient when the catheter is in place.
Claim 21
Dependent Claim
18 words
The improved system of claim 17 wherein said loop has a radius of curvature of at least 3/16".
Claim 22
Dependent Claim
23 words
The improved system of claim 17 wherein said catheter has an inner diameter of 0.104 inches and an outer diameter of 0.165 inches.
Claim 23
Dependent Claim
11 words
The improved system of claim 17 wherein said loop is heat-set.
Claim 24
Dependent Claim
28 words
The improved system of claim 17 wherein a remaining external portion of said tube, proximal to said external portion having said loop, may be oriented in any direction.
Claim 25
Dependent Claim
13 words
The improved system of claim 17 wherein said arc is at least 180°.
Claim 26
Dependent Claim
13 words
The improved system of claim 17 wherein said system is a multi-lumen catheter.
Claim 27
Dependent Claim
21 words
The improved system of claim 17 further comprising electrical conductors running through the lumen of said catheter for delivery of electricity.
Claim 28
Dependent Claim
156 words
An improved system for the introduction of fluids or electrical leads to a patient, said system comprising: a percutaneous access device including a skirt for embedding in the subcutaneous tissue of the patient and a neck extending from the skirt for extending through the dermal and epidermal layers of the skin or the patient, said neck having a bore therethrough; and a catheter comprising at least two thermoset tubes each defining an internal lumen, each of said tubes having an outer diameter sized to permit insertion of the tube through said bore and having a proximal end for placement in the patient and a distal end located external to the patient when the catheter is in use, each of said tubes also having a permanent loop with an arc of at least 90° toward its distal end at a portion of the tube which is just external to the patient when the system is in place.
Claim 29
Dependent Claim
156 words
An improved system for the introduction of fluids or electrical leads to a patient, said system comprising: a percutaneous access device including a skirt for embedding in the subcutaneous tissue of the patient and a neck extending from the skirt for extending through the dermal and epidermal layers of the skin or the patient, said neck having a bore therethrough; and a catheter comprising at least two thermoset tubes each defining an internal lumen, each of said tubes having an outer diameter sized to permit insertion of the tube through said bore and having a proximal end for placement in the patient and a distal end located external to the patient when the catheter is in use, each of said tubes also having a permanent loop with an arc of at least 90° toward its distal end at a portion of the tube which is just external to the patient when the system is in place.
Claim 30
Dependent Claim
18 words
The improved system of claim 25 wherein said loop has a radius of curvature of at least 3/16".
Claim 31
Dependent Claim
23 words
The improved system of claim 23 wherein said catheter has an inner diameter of 0.104 inches and an outer diameter of 0.165 inches.
Claim 32
Dependent Claim
11 words
The improved system of claim 25 wherein said loop is heat-set.
Claim 33
Dependent Claim
28 words
The improved system of claim 25 wherein a remaining external portion of said tube, proximal to said external portion having said loop, may be oriented in any direction.
Claim 34
Dependent Claim
13 words
The improved system of claim 25 wherein said arc is at least 180°.
Claim 35
Dependent Claim
13 words
The improved system of claim 25 wherein said catheter is a multi-lumen catheter.
Claim 36
Dependent Claim
21 words
The improved system of claim 25 further comprising electrical conductors running through the lumen of said catheter for delivery of electricity.
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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) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |