WO2003057299A1 - Catheter having an improved torque transmitting shaft - Google Patents
Catheter having an improved torque transmitting shaft Download PDFInfo
- Publication number
- WO2003057299A1 WO2003057299A1 PCT/US2002/040953 US0240953W WO03057299A1 WO 2003057299 A1 WO2003057299 A1 WO 2003057299A1 US 0240953 W US0240953 W US 0240953W WO 03057299 A1 WO03057299 A1 WO 03057299A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- catheter
- raised pattern
- accordance
- elongate shaft
- shaft
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M2025/006—Catheters; Hollow probes characterised by structural features having a special surface topography or special surface properties, e.g. roughened or knurled surface
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
Definitions
- the present invention relates generally to catheters for performing medical procedures including intravascular procedures such as percutaneous transluminal coronary angioplasty. More particularly, the present invention relates to catheters with an improved shaft design.
- intravascular catheters have become an effective method for treating many types of vascular disease.
- an intravascular catheter is inserted into the vascular system of the patient and navigated through the vasculature to a desired target site.
- vascular system vascular system of the patient
- PTCA percutaneous transluminal coronary angioplasty
- Catheters are also known for use in other body lumens for non-vascular therapeutic purposes. These can include pancreato-biliary treatments and urological applications.
- a catheter enables a physician to remotely perform a medical procedure by inserting the catheter into a body lumen, such as a blood vessel, of a patient at a location that is easily accessible, and thereafter navigating the catheter to the desired target site.
- a body lumen such as a blood vessel
- the catheter typically enters the patient's vasculature at a convenient location such as a blood vessel in the arm, neck or near the groin.
- the balloon dilatation catheter is then advanced past the distal end of the guide catheter over the guidewire until the balloon is positioned across the treatment site. After the balloon is inflated to dilate the blood vessel in the region of the treatment site, the guidewire, balloon dilatation catheter and guide catheter can be withdrawn.
- Balloon catheters used with the above-described guide catheters are typically classified as over-the-wire (OTW) or single operator exchange (SOE).
- An OTW catheter includes a guidewire lumen extending through a tubular shaft from the distal tip of the catheter to the proximal end of the catheter.
- a second tubular shaft extends coaxially over the first shaft to form an annular inflation lumen therebetween in fluid communication with a balloon disposed near the distal end of the two shafts.
- SOE catheters have a relatively short guidewire lumen relative to the length of the catheter which extends through a first tubular shaft.
- the first tubular shaft is usually disposed within a lumen of a second tubular shaft which extends the length of the catheter.
- the second tubular shaft lumen again provides means for inflating the balloon disposed near the distal end of the shaft assembly.
- a common feature to all catheters is the need for shaft assemblies which have adequate torque transmission and yet retain sufficient flexibility to reach desired treatment sites.
- Tubular members having lumens therethrough are generally used to form the shaft assemblies and selection and design of the tubular members determines the resulting balance between torqueability and flexibility.
- the present invention relates generally to catheters for performing medical procedures including percutaneous transluminal coronary angioplasty. More particularly, the present invention relates to catheters with an improved shaft design. Preferably, the present invention comprises a catheter with an improved torque transmitting shaft. In an exemplary embodiment, the current invention comprises a catheter having an improved torque transmitting shaft and having a desired amount of flexibility.
- a raised pattern is disposed at the outer surface.
- the raised pattern may include a number of shapes and patterns.
- a pattern is understood to include regular, irregular, and random arrangements of a design or object.
- the raised pattern may resemble a tire tread pattern, a plurality of castellations, a diamond-shaped tread pattern, an embossed pattern, etc.
- the catheter may include, but is not limited to, a single-operator-exchange catheter, an over-the-wire catheter, a guide catheter, a balloon catheter, an angioplasty catheter, an atherectomy catheter, etc.
- the elongate shaft may comprise one or more components of a catheter.
- the elongate shaft may include an inner shaft, an outer shaft, or both.
- the raised pattern can be formed on the outer surface by a number of methods including, but not limited to, laser ablation, overmolding, hot die casting, embossing, and extrusion.
- the raised pattern can be formed by removing a portion of the outer surface.
- a portion of the outer surface can be removed by laser ablation.
- when a portion of the outer surface is removed, for example by laser ablation no more than about 25%-75% of the wall thickness on the outer surface is removed.
- no more than about 65%-75% of the wall thickness of the outer surface is removed.
- the raised pattern can be formed by embedding a braid into the outer surface, preferably when the polymer shaft is heated or softened, then cooled. The braid is then removed, and the pattern left by the braid forms the raised pattern.
- the raised pattern improves the transmission of torque along the elongate shaft.
- the raised pattern can provide a high degree of torque transmittance while maintaining a high degree of flexibility.
- torque transmission is understood to mean that applying torque to one end of an object, for example, the proximal end of the elongate shaft, results in a substantially equivalent amount of torque at another end of the object, for example, the distal end of the elongate shaft.
- Figure 1 is a plan view of a portion of a catheter shaft according to a preferred embodiment of the invention.
- Figure 2 is a cross-sectional view of the catheter shaft through line 2-2 of Figure 1 according to a preferred embodiment of the invention
- Figure 3 is a cross-sectional view of the catheter through line 3-3 of Figure 1 according to a preferred embodiment of the invention.
- Figure 4 is a plan view of the catheter shaft of Figure 1 depicting transmission of torque according to a preferred embodiment of the invention. Detailed Description of the Preferred Embodiments
- FIG. 1 is a plan view of a portion of a catheter according to a preferred embodiment of the invention.
- a catheter 10 comprises an elongate shaft 12.
- elongate shaft 12 further comprises a proximal end (not shown) and a distal end (not shown).
- catheter 10 may include, but is not limited to, a single-operator-exchange catheter, an over-the-wire catheter, a guide catheter, a balloon catheter, an angioplasty catheter, an atherectomy catheter, etc.
- a person of ordinary skill in the art would be familiar with different types of catheters appropriate for multiple embodiments of the present invention.
- elongate shaft 12 may comprise one or more components of catheter 10.
- catheter 10 may further comprise an inner shaft, an outer shaft, or both.
- elongate shaft 12 may comprise the inner shaft, outer shaft, or both.
- elongate shaft 12 can be manufactured from a number of materials including, but not limited to, stainless steel metal, nickel alloy, nickel-titanium alloy, hollow cylindrical stock, thermoplastics, high performance engineering resins, polymer, polyethylene (PE), polypropylene (PP), polyvinylchloride (PNC), polyurethane, polytetrafluoroethylene (PTFE), polyether- ether ketone (PEEK), polyimide, polyamide, polyphenylene sulfide (PPS), polyphenylene oxide (PPO), polysufone, nylon, or perfluoro(propyl vinyl ether) (PFA).
- PPS polyphenylene sulfide
- PPO polyphenylene oxide
- PFA perfluoro(propyl vinyl ether)
- elongate shaft 12 is manufactured so as to maintain the desired level of flexibility and torqueability according to multiple embodiments of the current invention.
- elongate shaft 12 further comprises an outer surface 20.
- outer surface 20 comprises materials similar to those disclosed above including metals and polymers.
- outer surface 20 comprises a unique surface disposed on elongate shaft 12.
- outer surface 20 may comprise a polymer sheath disposed over elongate shaft 12.
- a raised pattern 24 is disposed at outer surface 20.
- Raised pattern 24 may include a number of shapes and patterns. According to a preferred embodiment of the present invention, a pattern is understood to include regular, irregular, and random arrangements of a design or objects. For example, raised pattern 24 may resemble a tire tread pattern, a plurality of castellations, a diamond-shaped tread pattern, an embossed pattern, a plurality of turrets, etc.
- raised pattern 24 can be formed on outer surface 20 by a number of methods including, but not limited to, laser ablation, overmolding, hot die casting, embossing, and extrusion.
- raised pattern 24 can be formed by removing a portion of outer surface 20.
- a portion of outer surface 20 can be removed by laser ablation.
- no more than about 25%-75% of the wall thickness on the outer surface 20 is removed.
- Preferably about 60%-75% of the wall thickness on the outer surface is removed.
- the raised pattern can be formed by embedding a braid into the outer surface, preferably when the polymer shaft is heated and softened, then cooled with the braid in place. Upon removal of the braid, the raised pattern is left.
- the thickness of the shaft wall is somewhat greater than what is typically used in the art.
- the thickness of typical shaft walls may be about 0.001 inches to 0.001 inches.
- the shaft wall may have a thickness of about 0.002 inches.
- forming raised pattern 24, for example by laser ablation may eliminate about 60%- 70% of the wall thickness of the shaft wall.
- outer surface 20 substantially emulates the thickness of thin-walled tubing.
- emulation of thin- walled tubing provides elongate shaft 12 with the desired level of flexibility.
- a catheter for example catheter 10 comprising elongate shaft 12, to be highly flexible.
- elongate shaft 12 is flexible.
- elongate shaft 12 emulates the flexibility of thin- walled tubing.
- elongate shaft 12 comprises an amount of flexibility suitable for performing an appropriate medical procedure.
- raised pattern 24 improves the transmission of torque along elongate shaft 12.
- raised pattern 24 can provide a high degree of torque transmittance while maintaining a high degree of flexibility.
- catheter 10 may comprise an elongate shaft with the desired amount of flexibility and improved torque transmission.
- torque transmission is understood to mean that applying torque to one end of an object, for example the proximal end of elongate shaft 12, results in a substantially equivalent amount of torque at another end of the object, for example distal end of elongate shaft 12.
- elongate shaft 12 includes means for improving torqueability. Torsional forces applied at the proximal end preferably translate to the distal end to aid in steering. Because of the tortuous path of the vascular system, the combination of flexibility and torqueability may aid in steering a catheter, for example catheter 10.
- FIG 2 is a cross-sectional view of the catheter shaft through line 2-2 of Figure 1.
- catheter 10 comprises elongate shaft 12 having lumen 18, outer surface 20, and inner surface 22.
- a raised pattern 24 is disposed at outer surface 20. Similar to what is disclosed above, raised pattern 24 may include a number of shapes and patterns and can be formed on outer surface 20 by a number of methods. As indicated, in a non-torqued state, the raised patterns maintain space between them which makes the untorqued shaft more flexible than a smooth-surfaced shaft of equal diameter and overall wall thickness.
- FIG. 3 is a cross-sectional view of the catheter shaft portion through line 3-3 of Figure 1 according to a preferred embodiment of the invention.
- catheter 10 comprises elongate shaft 12 having a proximal end (not shown) and a distal end (not shown).
- elongate shaft 12 further comprises outer surface 20.
- a lumen 18 extends between the proximal end and the distal end.
- elongate shaft 12 further comprises an inner surface 22.
- inner surface 22 is in fluid communication with lumen 18.
- catheters 10 such as single-operator-exchange catheters, over-the-wire catheters, guide catheters, balloon catheters, angioplasty catheters, atherectomy catheters, etc.
- the raised pattern 24 is disposed at outer surface
- raised pattern 24 may include a number of shapes and patterns and can be formed on outer surface 20 by a number of methods.
- the raised pattern 24 improves the transmission of torque along elongate shaft 12.
- raised pattern 24 comes in contact with itself creating a plurality of bearing points (not shown, please see element 26 of Figure 4).
- the bearing points transmit torque along elongate shaft 12.
- the transmission of torque along elongate shaft 12 is understood to be the transmission of torque longitudinally along elongate shaft 12.
- Figure 4 is a plan view of the catheter shaft portion of Figure 1 transmitting torque according to a preferred embodiment of the invention.
- catheter 10 comprises elongate shaft 12 having a proximal end and a distal end.
- elongate shaft 12 further comprises outer surface 20.
- a raised pattern 24 is disposed at outer surface 20.
- Raised pattern 24 may include a number of shapes and patterns and can be formed on outer surface 20 by a number of methods.
- bearing points 26 are understood to be contact points within or between portions of raised pattern 24 over at least a portion of the catheter shaft length that contact one another when elongate shaft 12 is torqued.
- bearing points 26 transmit torque along elongate shaft 12.
- the transmission of torque along elongate shaft 12 is understood to be the transmission of torque longitudinally along at least a portion of elongate shaft 12.
- raised pattern 24 improves torque transmission with minimal negative effects on the flexibility of elongate shaft 12.
- catheter 10 may comprise an elongate shaft with the desired amount of flexibility and improved torque transmission.
- bearing points 26 will prevent the failure of torque transmission along elongate shaft 12.
- torque transmission is understood to mean that applying torque to one end of an object, for example the proximal end of elongate shaft 12, results in a substantially equivalent amount of torque at another end of the object, for example the distal end of elongate shaft 12.
- catheter 10 may be used to perform an appropriate medical procedure.
- bearing points 26 within raised pattern 24 will contact one another.
- bearing points 26 will transfer torque along elongate shaft 12.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002360706A AU2002360706A1 (en) | 2001-12-27 | 2002-12-19 | Catheter having an improved torque transmitting shaft |
JP2003557653A JP4906232B2 (en) | 2001-12-27 | 2002-12-19 | Catheter with improved torque transmission shaft |
CA2469062A CA2469062C (en) | 2001-12-27 | 2002-12-19 | Catheter having an improved torque transmitting shaft |
EP02795987A EP1461107B1 (en) | 2001-12-27 | 2002-12-19 | Catheter having an improved torque transmitting shaft |
DE60209803T DE60209803T2 (en) | 2001-12-27 | 2002-12-19 | CATHETER WITH AN IMPROVED SHAFT TRANSMITTING THE TORQUE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/034,586 US7488338B2 (en) | 2001-12-27 | 2001-12-27 | Catheter having an improved torque transmitting shaft |
US10/034,586 | 2001-12-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003057299A1 true WO2003057299A1 (en) | 2003-07-17 |
Family
ID=21877334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2002/040953 WO2003057299A1 (en) | 2001-12-27 | 2002-12-19 | Catheter having an improved torque transmitting shaft |
Country Status (9)
Country | Link |
---|---|
US (2) | US7488338B2 (en) |
EP (1) | EP1461107B1 (en) |
JP (1) | JP4906232B2 (en) |
AT (1) | ATE319497T1 (en) |
AU (1) | AU2002360706A1 (en) |
CA (1) | CA2469062C (en) |
DE (1) | DE60209803T2 (en) |
ES (1) | ES2259392T3 (en) |
WO (1) | WO2003057299A1 (en) |
Families Citing this family (23)
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US20040167438A1 (en) * | 2003-02-26 | 2004-08-26 | Sharrow James S. | Reinforced medical device |
US8550985B2 (en) * | 2004-12-14 | 2013-10-08 | Boston Scientific Scimed, Inc. | Applications of LIPSS in polymer medical devices |
US8202245B2 (en) * | 2005-01-26 | 2012-06-19 | Boston Scientific Scimed, Inc. | Medical devices and methods of making the same |
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US10391274B2 (en) | 2016-07-07 | 2019-08-27 | Brian Giles | Medical device with distal torque control |
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2001
- 2001-12-27 US US10/034,586 patent/US7488338B2/en not_active Expired - Fee Related
-
2002
- 2002-12-19 ES ES02795987T patent/ES2259392T3/en not_active Expired - Lifetime
- 2002-12-19 AT AT02795987T patent/ATE319497T1/en not_active IP Right Cessation
- 2002-12-19 AU AU2002360706A patent/AU2002360706A1/en not_active Abandoned
- 2002-12-19 WO PCT/US2002/040953 patent/WO2003057299A1/en active IP Right Grant
- 2002-12-19 JP JP2003557653A patent/JP4906232B2/en not_active Expired - Fee Related
- 2002-12-19 DE DE60209803T patent/DE60209803T2/en not_active Expired - Lifetime
- 2002-12-19 EP EP02795987A patent/EP1461107B1/en not_active Expired - Lifetime
- 2002-12-19 CA CA2469062A patent/CA2469062C/en not_active Expired - Fee Related
-
2008
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Also Published As
Publication number | Publication date |
---|---|
EP1461107A1 (en) | 2004-09-29 |
DE60209803D1 (en) | 2006-05-04 |
JP2005538747A (en) | 2005-12-22 |
US20090118759A1 (en) | 2009-05-07 |
EP1461107B1 (en) | 2006-03-08 |
DE60209803T2 (en) | 2006-11-16 |
ES2259392T3 (en) | 2006-10-01 |
US20030125762A1 (en) | 2003-07-03 |
US8231647B2 (en) | 2012-07-31 |
US7488338B2 (en) | 2009-02-10 |
CA2469062C (en) | 2011-03-22 |
JP4906232B2 (en) | 2012-03-28 |
CA2469062A1 (en) | 2003-07-17 |
ATE319497T1 (en) | 2006-03-15 |
AU2002360706A1 (en) | 2003-07-24 |
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