US5387199A
Expired / Lapsed
US
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Polymer blends for torque transmitting catheters
Assignee: Edwards Lifesciences Corp
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Filing: 1994-03-02
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Granted: 1995-02-07
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Expires: 2014-03-02
Abstract
Abstract Polymer blends having improved torque transmitting properties are disclosed. The polymer blends include polyetherurethane and a concentration of polyetherester sufficient to provide the polymer blend with a 37 DEG C. dynamic torque value greater than 40% of the polymer blend's 25 DEG C. dynamic torque value. The polymer blend can be thermally processed to form small diameter tubing suitable for general purpose catheters requiring both a high degree of maneuverability and sufficient resiliency to avoid tissue perforation.
Inventors
- 👤 Jaime E. Siman
- 👤 Clement Lieber
- 👤 Nancy Shadforth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:18
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/04; A61L29/049; C; C08; C08L; C08L75/00; C08L75/04; C08L75/08
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
56 words
A catheter useful for accessing body cavities during therapeutic and diagnostic medical procedures, said catheter comprising: an elongated tubular member having at least one lumen, said elongated tubular member formed of a heat extruded homogeneous polymer blend of polyetherurethane and polyetherester, wherein said polymer blend provides the catheter with enhanced torque retention and balanced rebound properties.
Claim 2
Dependent Claim
56 words
A catheter useful for accessing body cavities during therapeutic and diagnostic medical procedures, said catheter comprising: an elongated tubular member having at least one lumen, said elongated tubular member formed of a heat extruded homogeneous polymer blend of polyetherurethane and polyetherester, wherein said polymer blend provides the catheter with enhanced torque retention and balanced rebound properties.
Claim 3
Dependent Claim
22 words
The catheter of claim 1 wherein said polyetherester is present in said polymer blend at a concentration of at least 5 w/w%.
Claim 4
Dependent Claim
53 words
The catheter of claim 1 wherein said polyetherurethane further includes a first polyetherurethane having a Shore hardness of about 65 D at 25° C., a second polyetherurethane having a Shore hardness of about 75 D at 25° C., and a third polyetherurethane having a Shore hardness of about 80 A at 25° C.
Claim 5
Dependent Claim
45 words
The catheter of claim 3 wherein said polymer blend includes from 0 w/w% to about 65 w/w% of said first polyetherurethane, from about 5 w/w% to about 35 w/w% of said second polyetherurethane, and from 0 w/w% to about 15 w/w% of said third polyetherurethane.
Claim 6
Dependent Claim
16 words
The catheter of claim 1 wherein said polymer blend further includes a filler of radiopaque material.
Claim 7
Dependent Claim
22 words
The catheter of claim 1 wherein said polymer blend further includes additives selected from the group consisting of TiO 2 and pigments.
Claim 8
Dependent Claim
60 words
The catheter of claim 1 wherein said polymer blend includes about 45 w/w% polyetherurethane having a Shore hardness of 65 D, about 7.2 w/w% polyetherurethane having a Shore hardness of 75 D, about 12.4 w/w% polyetherurethane having a Shore hardness of 80 A, about 6.4 w/w% polyetherester, about 1% TiO 2 , and about 28 w/w% BaSO 4 radiopaque material.
Claim 9
Dependent Claim
22 words
The catheter of claim 1 wherein said polymer blend includes inorganic compounds selected from the group consisting of radiopaque filler and pigments.
Claim 10
Dependent Claim
13 words
The composition of claim 8 wherein said radiopaque filler is BaSO 4 .
Claim 11
Dependent Claim
26 words
The catheter of claim 1 wherein said polyetherester is present in said polymer blend at a concentration of from about 5 w/w% to about 45 w/w%.
Claim 12
Dependent Claim
45 words
The catheter of claim 1 wherein said polymer blend includes from about 25 w/w% to about 75 w/w% polyetherurethane, from about 5 w/w% to about 45 w/w% polyetherester, from about 15 w/w% to about 30 w/w% filler of radiopaque material, and about 1 w/w% pigment.
Claim 13
Dependent Claim
105 words
A catheter having improved maneuverability and torque transmitting properties at 25° C. and 37° C., said catheter comprising: an elongated tubular member having at least one lumen, said elongated tubular member formed of a thermoplastic homogenous blend of polyetherurethane and polyetherester, said blend having from about 5 w/w% to about 45 w/w% polyetherester, from about 0 w/w% to about 45 w/w% polyetherurethane having a Shore hardness of 65 D, from about 7.2 w/w% to about 16 w/w% polyetherurethane having a Shore hardness of 75 D, and from about 12.4 w/w% to about 12.9 w/w% polyetherurethane having a Shore hardness of 80 A or 40 D.
Claim 14
Dependent Claim
105 words
A catheter having improved maneuverability and torque transmitting properties at 25° C. and 37° C., said catheter comprising: an elongated tubular member having at least one lumen, said elongated tubular member formed of a thermoplastic homogenous blend of polyetherurethane and polyetherester, said blend having from about 5 w/w% to about 45 w/w% polyetherester, from about 0 w/w% to about 45 w/w% polyetherurethane having a Shore hardness of 65 D, from about 7.2 w/w% to about 16 w/w% polyetherurethane having a Shore hardness of 75 D, and from about 12.4 w/w% to about 12.9 w/w% polyetherurethane having a Shore hardness of 80 A or 40 D.
Claim 15
Dependent Claim
23 words
The catheter of claim 1 wherein said polymer blend further includes inorganic compounds selected from the group consisting of radiopaque filler and pigments.
Claim 16
Dependent Claim
22 words
The catheter of claim 1 wherein said polyetherurethane is present in said polymer blend at a concentration of at least 22.4 w/w%.
Claim 17
Dependent Claim
26 words
The catheter of claim 1 wherein said polyetherurethane is present in said polymer blend at a concentration of from about 25 w/w% to about 75 w/w%.
Claim 18
Dependent Claim
19 words
The catheter of claim 1 wherein said polyetherester has a Shore hardness of about 55 D at 25° C.
Claim 19
Dependent Claim
13 words
The catheter of claim 5 wherein said radiopaque filler is BaSO 4 .
Claim 20
Dependent Claim
59 words
The catheter of claim 1 wherein said polymer blend includes about 16.0 w/w% polyetherurethane having a Shore hardness of 75 D, about 12.9 w/w% polyetherurethane having a Shore hardness of 80 A, about 39.9 w/w% polyetherester having a hardness of about 55 D, about 0.8% TiO 2 , about 30 w/w% BaSO 4 radiopaque material, and about 0.4% pigment.
Claim 21
Dependent Claim
59 words
The catheter of claim 1 wherein said polymer blend includes about 9.5 w/w% polyetherurethane having a Shore hardness of 75 D, about 12.9 w/w% polyetherurethane having a Shore hardness of 80 A, about 46.4 w/w% polyetherester having a hardness of about 55 D, about 0.8% TiO 2 , about 30 w/w% BaSO 4 radiopaque material, and about 0.4% pigment.
Claim 22
Dependent Claim
101 words
A catheter useful for accessing body cavities during therapeutic and diagnostic medical procedures, said catheter comprising: an elongated tubular member having at least one lumen, said elongated tubular member formed of a heat extruded homogeneous polymer blend of polyetherurethanes and polyetherester, said blend having about 45 w/w% polyetherurethane having a Shore hardness of 65 D, about 7.2 w/w% polyetherurethane having a Shore hardness of 75 D, about 12.4 w/w% polyetherurethane having a Shore hardness of 80 A, about 6.4 w/w% polyetherester having a hardness of about 55 D, about 1% TiO 2 , and about 28 w/w% BaSO 4 radiopaque material.
Claim 23
Dependent Claim
101 words
A catheter useful for accessing body cavities during therapeutic and diagnostic medical procedures, said catheter comprising: an elongated tubular member having at least one lumen, said elongated tubular member formed of a heat extruded homogeneous polymer blend of polyetherurethanes and polyetherester, said blend having about 45 w/w% polyetherurethane having a Shore hardness of 65 D, about 7.2 w/w% polyetherurethane having a Shore hardness of 75 D, about 12.4 w/w% polyetherurethane having a Shore hardness of 80 A, about 6.4 w/w% polyetherester having a hardness of about 55 D, about 1% TiO 2 , and about 28 w/w% BaSO 4 radiopaque material.
Claim 24
Dependent Claim
90 words
A catheter useful for accessing body cavities during therapeutic and diagnostic medical procedures, said catheter comprising: an elongated tubular member having at least one lumen, said elongated tubular member formed of a heat extruded homogeneous polymer blend of polyetherurethanes and polyetherester, said blend having about 16 w/w% polyetherurethane having a Shore hardness of 75 D, about 12.9 w/w% polyetherurethane having a Shore hardness of 80 A, about 39.9 w/w% polyetherester having a hardness of about 55 D, about 1.2% TiO 2 , and about 30 w/w% BaSO 4 radiopaque material.
Claim 25
Dependent Claim
90 words
A catheter useful for accessing body cavities during therapeutic and diagnostic medical procedures, said catheter comprising: an elongated tubular member having at least one lumen, said elongated tubular member formed of a heat extruded homogeneous polymer blend of polyetherurethanes and polyetherester, said blend having about 16 w/w% polyetherurethane having a Shore hardness of 75 D, about 12.9 w/w% polyetherurethane having a Shore hardness of 80 A, about 39.9 w/w% polyetherester having a hardness of about 55 D, about 1.2% TiO 2 , and about 30 w/w% BaSO 4 radiopaque material.
Claim 26
Dependent Claim
90 words
A catheter useful for accessing body cavities during therapeutic and diagnostic medical procedures, said catheter comprising: an elongated tubular member having at least one lumen, said elongated tubular member formed of a heat extruded homogeneous polymer blend of polyetherurethanes and polyetherester, said blend having about 9.5 w/w% polyetherurethane having a Shore hardness of 75 D, about 12.9 w/w% polyetherurethane having a Shore hardness of 80 A, about 46.4 w/w% polyetherester having a hardness of about 55 D, about 1.2% TiO 2 , and about 30 w/w% BaSO 4 radiopaque material.
Claim 27
Dependent Claim
90 words
A catheter useful for accessing body cavities during therapeutic and diagnostic medical procedures, said catheter comprising: an elongated tubular member having at least one lumen, said elongated tubular member formed of a heat extruded homogeneous polymer blend of polyetherurethanes and polyetherester, said blend having about 9.5 w/w% polyetherurethane having a Shore hardness of 75 D, about 12.9 w/w% polyetherurethane having a Shore hardness of 80 A, about 46.4 w/w% polyetherester having a hardness of about 55 D, about 1.2% TiO 2 , and about 30 w/w% BaSO 4 radiopaque material.
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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) | 1998-02-06 | 1998-08-08 | 1999-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-06 | 2002-08-08 | 2003-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-06 | 2006-08-08 | 2007-02-07 | $7700.00 | Window Closed / Lapsed |