US20140100566A1 - Medical catheter assembly with deflection pull ring and distal tip interlock - Google Patents
Medical catheter assembly with deflection pull ring and distal tip interlockDownload PDFInfo
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- US20140100566A1 US20140100566A1US14/051,143US201314051143AUS2014100566A1US 20140100566 A1US20140100566 A1US 20140100566A1US 201314051143 AUS201314051143 AUS 201314051143AUS 2014100566 A1US2014100566 A1US 2014100566A1
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- Prior art keywords
- pull
- assembly
- distal
- catheter
- pull wire
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- 210000001367arteryAnatomy0.000description1
- 238000005452bendingMethods0.000description1
- 230000001010compromised effectEffects0.000description1
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Images
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
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0147—Tip steering devices with movable mechanical means, e.g. pull wires
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1492—Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart ablation
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/003—Steerable
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1472—Probes or electrodes therefor for use with liquid electrolyte, e.g. virtual electrodes
- 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
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0147—Tip steering devices with movable mechanical means, e.g. pull wires
- A61M2025/015—Details of the distal fixation of the movable mechanical means
Definitions
- the present inventionrelates to medical catheter assemblies, and in particular to medical catheter assemblies which utilize a deflection pull ring adjacent a distal tip at the distal end of the catheter shaft to bend the deflectable catheter shaft and move the distal tip in a desired direction.
- Medical catheter assemblies used in the diagnosis or treatment of various medical abnormalitiesare in common use in medical facilities throughout the world. They generally include a deflectable catheter shaft that can be inserted in and extended along a suitable vein or artery of person being diagnosed or treated to a desired site; a handle actuator which supports a proximal end of the catheter shaft; a distal tip which is connected to the distal end of the catheter shaft and which includes a specialized tip element for the appropriate diagnosis or treatment; and a pull ring assembly which includes a pull ring near the distal end of the catheter shaft and pull wires which extend from the pull ring through the catheter shaft back to the handle actuator for tilting or rocking the pull ring upon manual operation of the handle actuator and consequential pulling of the pull wires, i.e., for deflecting a distal end portion of the catheter shaft with distal tip in a desired direction.
- Ablation catheter assembliesare a category of medical catheter assembly used to ablate tissue, e.g., in the treatment of heart malfunctions. They can be irrigated (discharge ablation fluid in addition to ablation energy) or non-irrigated (discharge of ablation energy but not fluid).
- the distal tipwill include a tip electrode as the specialized tip element and an energy source will be connected to their handle actuator to supply energy to the tip electrode.
- a fluid manifoldis attached to, or is one-piece with, the tip electrode, and a fluid source is attached to their handle actuator to supply ablation fluid thereto.
- the distal tipcan include a mounting shaft which cooperates with the distal end of the adjacent deflectable catheter shaft for connection thereto.
- a catheter assemblycan comprise a deflectable catheter shaft comprising a distal end and a lumen extending therethrough; at least one pull wire comprising a distal portion comprising: a side and a distal end, wherein the side comprises a first side portion and a second side portion; and a distal pull assembly operatively coupled to the at least one pull wire.
- the distal pull assemblycan comprise a longitudinal axis; a first surface; and a second surface.
- the first side portion of the at least one pull wirecan be adjacent to the first surface of the distal pull assembly.
- the second side portion of the at least one pull wirecan be adjacent to the second surface of the distal pull assembly.
- the first side portion of the at least one pull wirecan contact and/or be in engagement with the first surface of the distal pull assembly and the second side portion of the at least one pull wire can contact and/or be in engagement with the second surface of the distal pull assembly.
- the second surface of the distal pull assemblyis substantially transverse to the first surface of the distal pull assembly.
- the first surfacecan comprise a radially facing surface and the second surface can comprise a substantially distally facing surface in accordance with some embodiments of the invention.
- the catheter assemblycan further comprise a distal tip at the distal end of the catheter shaft and including a tip element and a mounting shaft.
- the at least one pull wirecan extend through the catheter shaft along the longitudinal axis of the distal pull assembly toward the distal end and then extend at least in part in a direction that is non-parallel to the longitudinal axis of the distal pull assembly.
- the at least one pull wirecan extend through the catheter shaft along the longitudinal axis of the pull assembly toward the distal end and then at least a portion of the pull wire can extend distal of the second surface of the distal pull assembly. Pulling of the at least one pull wire can directly impart force to the distal pull assembly to bend the catheter shaft.
- the catheter assemblycan comprise two pull wires attached to diametrically opposite locations on the distal pull assembly in accordance with some embodiments of the invention.
- the at least one pull wirecan be flat along at least a portion of its length in accordance with some embodiments of the invention. At least a portion of the at least one pull wire can be adjacent to an outer surface of the distal pull assembly in accordance with some embodiments of the invention.
- the at least one pull wirecan be configured such that when force is applied to the at least one pull wire in a proximal direction, the pull assembly deflects.
- a catheter assemblycan comprise a deflectable catheter shaft comprising a distal end and a lumen extending therethrough; at least one pull wire comprising a distal portion comprising: a side, wherein the side comprises a first side portion and a second side portion; and a distal end; and a distal pull assembly comprising: a longitudinal axis; a first surface comprising a radially facing surface; and a second surface comprising at least in part a substantially distally facing surface.
- the first side portion of the at least one pull wirecan be adjacent to the first surface of the distal pull assembly.
- the second side portion of the at least one pull wirecan be adjacent to the second surface of the distal pull assembly.
- the at least one pull wirecan extend through the catheter shaft along the longitudinal axis of the distal pull assembly toward the distal end and then extend at least in part in a direction that is non-parallel to the longitudinal axis of the distal pull assembly. At least a portion of the at least one pull wire can extend distal of the second surface of the distal pull assembly.
- the at least one pull wire and the distal pull assemblyare configured such that pulling of said pull wire can directly impart force to the distal pull assembly to bend the catheter shaft.
- FIG. 1is an isometric view of an irrigated ablation catheter system that includes an ablation catheter assembly, an energy source and a fluid source in accordance with a first embodiment of the present invention
- FIG. 2is an enlarged side view of the distal end portion of the deflectable ablation catheter shaft, the pull ring assembly and distal tip of the catheter of FIG. 1 ;
- FIG. 3is an enlarged detail of FIG. 2 ;
- FIG. 4is a side view, partly in section, of a distal end portion of a catheter shaft, a pull ring assembly and a distal tip according to a second embodiment of the invention.
- FIGS. 5 and 6show side views of third and fourth embodiments.
- FIG. 1shows an irrigated ablation catheter system 10 according to a preferred embodiment of the present invention. It includes an irrigated ablation catheter assembly 12 connected to an energy source 130 and a fluid source 140 .
- the irrigated ablation catheter assembly 12includes a catheter 20 , a handle actuator 120 which supports a proximate end of the catheter 20 , a distal tip 30 attached to a distal end of the catheter and a pull ring assembly 50 .
- the distal tip 30includes a tip electrode 31 , a fluid manifold 33 and a mounting shaft 38 .
- the fluid manifold 33is attached to the tip electrode with adhesive (in another embodiment the fluid manifold and the tip electrode can be one piece).
- the mounting shaft 38is one piece with the fluid manifold 33 , and it extends into the hollow interior 23 of the catheter shaft 21 . It has a smaller diameter than that of the fluid manifold (which is cylindrical in shape), thus leaving an outer annular ledge 34 on a rear face of the fluid manifold.
- the mounting shaftdefines a central axial passageway 39 for ablation fluid supplied by a fluid delivery tube (not shown) in the catheter shaft.
- the fluid manifold 33defines a central axial passageway 35 which is an extension of the central axial passageway 39 , and delivery channels 36 that extend from the axial passageway 35 to orifices 37 spaced around its periphery (in another embodiment only one delivery channel leading to one orifice is employed). Fluid supplied to the axial passageway 39 in the mounting shaft will flow to the axial passageway 35 and then through delivery channels 36 to orifices 37 for discharge around the distal tip.
- the tip electrode 31includes a channel 32 which will deliver fluid from the axial passageway 35 to its distal end. It can be made of platinum or other well-known materials.
- Guide channels 41 and 42are provided in the mounting shaft 38 at diametrically-opposed locations.
- the guide channel 41includes a curved section 41 a and a rectilinear section 41 b.
- the curved section 41 ahas an inlet opening in the outer surface of the mounting shaft near fluid manifold 33 and the rectilinear section 41 b has an outlet opening at the free end 40 of the mounting shaft.
- the guide channel 42has corresponding sections 42 a and 42 b. The pull wires of the pull ring assembly respectively extend through these guide channels.
- the pull ring assembly 50includes a pull ring 51 and pull wires 52 and 53 attached to diametrically opposite locations on an inner face of the pull ring by a solder or weld joint 54 .
- the pull wiresare flat along at least a portion of their length, in particular at their distal ends, otherwise round. Other configurations are possible.
- the pull ring 51is positioned between the distal end 22 of the catheter shaft 21 and the outer annular ledge 34 of the fluid manifold, and the pull wires extend from the pull ring toward the fluid manifold and then loop back respectively in and through the guide channels 41 and 42 to the handle actuator 120 .
- Pulling of the pull wires 52 , 53 by the handle actuator during use of the catheter assemblywill cause the pull ring to tilt or rock, thereby bending the catheter shaft 21 , and also pulling the pull ring 51 toward contact with the outer annular ledge 34 of the fluid manifold 33 .
- the distal tip 60includes a specialized tip element 61 (in an ablation catheter assembly a tip electrode) and a mounting shaft 62 having a distal portion 63 and a proximal portion 67 .
- the proximal portion 67includes barbs 68 in its outer surface to grip the distal end of the catheter shaft 21 a, and axial grooves (guide channels) 69 , 70 at diametrically opposed locations. The barbs could be replaced by surface protrusions of varying configurations.
- the distal portion 63includes an annular flange 64 having axial guide channels 65 and 66 therethrough which are aligned with axial grooves 69 and 70 .
- the pull ring 72 of pull ring assembly 71is positioned between the distal end of catheter shaft 21 a and an outer annular ledge 61 a of the tip element 61 , and the pull wires 73 and 74 attached to diametrically opposed locations on its inner face extend toward the tip electrode and then loop back through respective guide channels 65 , 69 and 66 , 70 to a handle actuator.
- a compression ring 100compresses a distal end portion of catheter shaft 21 b against an outer surface of mounting shaft 82 , which is one-piece with the tip element 81 , and the pull wires 93 and 94 of pull ring assembly 91 extend toward the tip element 81 of distal tip 80 and then loop back toward the catheter shaft and pass through respective axial grooves (guide channels) 95 , 96 in the outer surface of the mounting shaft.
- the compression ring 100has a generally rectangular cross-section.
- the compression ring 110defines a generally flat surface 111 facing inwardly toward the mounting shaft and a generally convex outwardly facing surface 112 .
- the pull ring assemblymay include more than two pull wires attached to the pull ring around its circumference, with corresponding guide channels provided in the distal tip to guide the individual pull wires first toward the tip element of the distal tip and then to loop back to the handle actuator.
- the compression ring as shown in FIGS. 5 and 6could have shapes other than those specifically depicted.
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Abstract
Description
- This application is a continuation of U.S. application Ser. No. 13/453,525, filed 23 Apr. 2012 (the '525 application) now pending, which is a continuation of U.S. application Ser. No. 11/963,441, filed 21 Dec. 2007, (the '441 application), now U.S. Pat. No. 8,162,934, issued 24 Apr. 2012. The '525 application and the '441 application are hereby incorporated by reference as though fully set forth herein.
- a. Field of the Invention
- The present invention relates to medical catheter assemblies, and in particular to medical catheter assemblies which utilize a deflection pull ring adjacent a distal tip at the distal end of the catheter shaft to bend the deflectable catheter shaft and move the distal tip in a desired direction.
- b. Background Art
- Medical catheter assemblies used in the diagnosis or treatment of various medical abnormalities are in common use in medical facilities throughout the world. They generally include a deflectable catheter shaft that can be inserted in and extended along a suitable vein or artery of person being diagnosed or treated to a desired site; a handle actuator which supports a proximal end of the catheter shaft; a distal tip which is connected to the distal end of the catheter shaft and which includes a specialized tip element for the appropriate diagnosis or treatment; and a pull ring assembly which includes a pull ring near the distal end of the catheter shaft and pull wires which extend from the pull ring through the catheter shaft back to the handle actuator for tilting or rocking the pull ring upon manual operation of the handle actuator and consequential pulling of the pull wires, i.e., for deflecting a distal end portion of the catheter shaft with distal tip in a desired direction.
- Ablation catheter assemblies are a category of medical catheter assembly used to ablate tissue, e.g., in the treatment of heart malfunctions. They can be irrigated (discharge ablation fluid in addition to ablation energy) or non-irrigated (discharge of ablation energy but not fluid). The distal tip will include a tip electrode as the specialized tip element and an energy source will be connected to their handle actuator to supply energy to the tip electrode. In irrigated catheter assemblies a fluid manifold is attached to, or is one-piece with, the tip electrode, and a fluid source is attached to their handle actuator to supply ablation fluid thereto. In either, the distal tip can include a mounting shaft which cooperates with the distal end of the adjacent deflectable catheter shaft for connection thereto.
- It has been found that the operation of such medical catheter assemblies, including irrigated or non-irrigated ablation catheter assemblies, can become compromised over time with creeping of the pull ring towards the handle actuator (and away from the distal tip) due to repeated tilting or rocking thereof by the pull wires. In addition, failure of the medical catheter assemblies can occur with separation of the pull wires from the pull rings of the pull ring assemblies due to stress failure of the braze or weld joints therebetween.
- It is thus an object of the present invention to provide a medical catheter assembly (including an irrigated or non-irrigated ablation catheter assembly) which is constructed such that creeping of the pull ring towards the handle actuator (and away from the distal tip) is prevented.
- It is another object of the present invention to provide a medical catheter assembly (including an irrigated or non-irrigated catheter assembly) which is constructed such that stress on the connecting joints between the pull wires and pull ring is reduced, reducing failure of medical catheter assembly due to failure of the pull ring assembly.
- A catheter assembly can comprise a deflectable catheter shaft comprising a distal end and a lumen extending therethrough; at least one pull wire comprising a distal portion comprising: a side and a distal end, wherein the side comprises a first side portion and a second side portion; and a distal pull assembly operatively coupled to the at least one pull wire. The distal pull assembly can comprise a longitudinal axis; a first surface; and a second surface. The first side portion of the at least one pull wire can be adjacent to the first surface of the distal pull assembly. The second side portion of the at least one pull wire can be adjacent to the second surface of the distal pull assembly. In accordance with some embodiments of the invention, the first side portion of the at least one pull wire can contact and/or be in engagement with the first surface of the distal pull assembly and the second side portion of the at least one pull wire can contact and/or be in engagement with the second surface of the distal pull assembly.
- In accordance with some embodiments of the invention, the second surface of the distal pull assembly is substantially transverse to the first surface of the distal pull assembly. The first surface can comprise a radially facing surface and the second surface can comprise a substantially distally facing surface in accordance with some embodiments of the invention. The catheter assembly can further comprise a distal tip at the distal end of the catheter shaft and including a tip element and a mounting shaft.
- The at least one pull wire can extend through the catheter shaft along the longitudinal axis of the distal pull assembly toward the distal end and then extend at least in part in a direction that is non-parallel to the longitudinal axis of the distal pull assembly. The at least one pull wire can extend through the catheter shaft along the longitudinal axis of the pull assembly toward the distal end and then at least a portion of the pull wire can extend distal of the second surface of the distal pull assembly. Pulling of the at least one pull wire can directly impart force to the distal pull assembly to bend the catheter shaft. The catheter assembly can comprise two pull wires attached to diametrically opposite locations on the distal pull assembly in accordance with some embodiments of the invention. The at least one pull wire can be flat along at least a portion of its length in accordance with some embodiments of the invention. At least a portion of the at least one pull wire can be adjacent to an outer surface of the distal pull assembly in accordance with some embodiments of the invention. The at least one pull wire can be configured such that when force is applied to the at least one pull wire in a proximal direction, the pull assembly deflects.
- A catheter assembly can comprise a deflectable catheter shaft comprising a distal end and a lumen extending therethrough; at least one pull wire comprising a distal portion comprising: a side, wherein the side comprises a first side portion and a second side portion; and a distal end; and a distal pull assembly comprising: a longitudinal axis; a first surface comprising a radially facing surface; and a second surface comprising at least in part a substantially distally facing surface. The first side portion of the at least one pull wire can be adjacent to the first surface of the distal pull assembly. The second side portion of the at least one pull wire can be adjacent to the second surface of the distal pull assembly. The at least one pull wire can extend through the catheter shaft along the longitudinal axis of the distal pull assembly toward the distal end and then extend at least in part in a direction that is non-parallel to the longitudinal axis of the distal pull assembly. At least a portion of the at least one pull wire can extend distal of the second surface of the distal pull assembly. The at least one pull wire and the distal pull assembly are configured such that pulling of said pull wire can directly impart force to the distal pull assembly to bend the catheter shaft.
- The invention will be better understood by reference to the attached drawings, taken in conjunction with the following discussion.
FIG. 1 is an isometric view of an irrigated ablation catheter system that includes an ablation catheter assembly, an energy source and a fluid source in accordance with a first embodiment of the present invention;FIG. 2 is an enlarged side view of the distal end portion of the deflectable ablation catheter shaft, the pull ring assembly and distal tip of the catheter ofFIG. 1 ;FIG. 3 is an enlarged detail ofFIG. 2 ;FIG. 4 is a side view, partly in section, of a distal end portion of a catheter shaft, a pull ring assembly and a distal tip according to a second embodiment of the invention, andFIGS. 5 and 6 show side views of third and fourth embodiments.FIG. 1 shows an irrigatedablation catheter system 10 according to a preferred embodiment of the present invention. It includes an irrigatedablation catheter assembly 12 connected to anenergy source 130 and afluid source 140.- The irrigated
ablation catheter assembly 12 includes acatheter 20, ahandle actuator 120 which supports a proximate end of thecatheter 20, adistal tip 30 attached to a distal end of the catheter and apull ring assembly 50. - As seen in
FIGS. 2 and 3 , thedistal tip 30 includes atip electrode 31, afluid manifold 33 and amounting shaft 38. Thefluid manifold 33 is attached to the tip electrode with adhesive (in another embodiment the fluid manifold and the tip electrode can be one piece). Themounting shaft 38 is one piece with thefluid manifold 33, and it extends into thehollow interior 23 of thecatheter shaft 21. It has a smaller diameter than that of the fluid manifold (which is cylindrical in shape), thus leaving an outerannular ledge 34 on a rear face of the fluid manifold. The mounting shaft defines a centralaxial passageway 39 for ablation fluid supplied by a fluid delivery tube (not shown) in the catheter shaft. Thefluid manifold 33 defines a centralaxial passageway 35 which is an extension of the centralaxial passageway 39, anddelivery channels 36 that extend from theaxial passageway 35 to orifices37 spaced around its periphery (in another embodiment only one delivery channel leading to one orifice is employed). Fluid supplied to theaxial passageway 39 in the mounting shaft will flow to theaxial passageway 35 and then throughdelivery channels 36 to orifices37 for discharge around the distal tip. Thetip electrode 31 includes achannel 32 which will deliver fluid from theaxial passageway 35 to its distal end. It can be made of platinum or other well-known materials. Guide channels shaft 38 at diametrically-opposed locations. Theguide channel 41 includes acurved section 41aand arectilinear section 41b.Thecurved section 41ahas an inlet opening in the outer surface of the mounting shaft nearfluid manifold 33 and therectilinear section 41bhas an outlet opening at thefree end 40 of the mounting shaft. Theguide channel 42 has correspondingsections - The
pull ring assembly 50 includes apull ring 51 and pullwires pull ring 51 is positioned between thedistal end 22 of thecatheter shaft 21 and the outerannular ledge 34 of the fluid manifold, and the pull wires extend from the pull ring toward the fluid manifold and then loop back respectively in and through theguide channels handle actuator 120. Pulling of thepull wires catheter shaft 21, and also pulling thepull ring 51 toward contact with the outerannular ledge 34 of thefluid manifold 33. - Turning now to the embodiment of
FIG. 4 , thedistal tip 60 includes a specialized tip element61 (in an ablation catheter assembly a tip electrode) and a mountingshaft 62 having adistal portion 63 and aproximal portion 67. Theproximal portion 67 includesbarbs 68 in its outer surface to grip the distal end of thecatheter shaft 21 a, and axial grooves (guide channels)69,70 at diametrically opposed locations. The barbs could be replaced by surface protrusions of varying configurations. Thedistal portion 63 includes anannular flange 64 havingaxial guide channels axial grooves pull ring assembly 71 is positioned between the distal end ofcatheter shaft 21 a and an outer annular ledge61 a of thetip element 61, and thepull wires respective guide channels - In the embodiment of
FIG. 5 , acompression ring 100 compresses a distal end portion of catheter shaft21bagainst an outer surface of mountingshaft 82, which is one-piece with thetip element 81, and thepull wires 93 and94 ofpull ring assembly 91 extend toward thetip element 81 ofdistal tip 80 and then loop back toward the catheter shaft and pass through respective axial grooves (guide channels)95,96 in the outer surface of the mounting shaft. Thecompression ring 100 has a generally rectangular cross-section. - In the embodiment of
FIG. 6 , which is similar to that ofFIG. 5 , thecompression ring 110 defines a generallyflat surface 111 facing inwardly toward the mounting shaft and a generally convex outwardly facingsurface 112. - Although a detailed explanation of various embodiments of the invention have been provided, changes therein can be made and still fall within the scope of the present invention. For example, the pull ring assembly may include more than two pull wires attached to the pull ring around its circumference, with corresponding guide channels provided in the distal tip to guide the individual pull wires first toward the tip element of the distal tip and then to loop back to the handle actuator. Also, the compression ring as shown in
FIGS. 5 and 6 could have shapes other than those specifically depicted.
Claims (15)
1. A catheter assembly comprising:
a deflectable catheter shaft comprising a distal end and a lumen extending therethrough;
at least one pull wire comprising a distal portion comprising:
a side, wherein the side comprises a first side portion and a second side portion; and
a distal end; and
a distal pull assembly operatively coupled to the at least one pull wire, the distal pull assembly comprising:
a longitudinal axis;
a first surface; and
a second surface, wherein the first side portion of the at least one pull wire is adjacent to the first surface of the distal pull assembly and wherein the second side portion of the at least one pull wire is adjacent to the second surface of the distal pull assembly.
2. The catheter assembly ofclaim 1 , wherein the second surface of the distal pull assembly is substantially transverse to the first surface of the distal pull assembly.
3. The catheter assembly ofclaim 1 , wherein the first surface comprises a radially facing surface.
4. The catheter assembly ofclaim 1 , wherein the second surface comprises a substantially distally facing surface.
5. The catheter assembly ofclaim 1 , further comprising a distal tip at the distal end of the catheter shaft and including a tip element and a mounting shaft.
6. The catheter assembly ofclaim 1 , wherein the at least one pull wire extends through the catheter shaft along the longitudinal axis of the distal pull assembly toward the distal end and then extends at least in part in a direction that is non-parallel to the longitudinal axis of the distal pull assembly.
7. The catheter assembly ofclaim 1 , wherein the at least one pull wire extends through the catheter shaft along the longitudinal axis of the pull assembly toward the distal end and then at least a portion of the pull wire extends distal of the second surface of the distal pull assembly.
8. The catheter assembly ofclaim 1 , wherein pulling of the at least one pull wire directly imparts force to the distal pull assembly to bend the catheter shaft.
9. The catheter assembly ofclaim 1 , wherein the catheter assembly comprises two pull wires attached to diametrically opposite locations on the distal pull assembly.
10. The catheter assembly ofclaim 1 , wherein the at least one pull wire is flat along at least a portion of its length.
11. The catheter assembly ofclaim 1 , wherein at least a portion of the at least one pull wire is adjacent to an outer surface of the distal pull assembly.
12. The catheter assembly ofclaim 1 , wherein the at least one pull wire is configured such that when force is applied to the at least one pull wire in a proximal direction, the pull assembly deflects.
13. The catheter assembly ofclaim 1 , wherein the first side portion of the at least one pull wire contacts the first surface of the distal pull assembly and wherein the second side portion of the at least one pull wire contacts the second surface of the distal pull assembly.
14. The catheter assembly ofclaim 1 , wherein the first side portion of the at least one pull wire is in engagement with the first surface of the distal pull assembly and wherein the second side portion of the at least one pull wire is in engagement with the second surface of the distal pull assembly.
15. A catheter assembly comprising:
a deflectable catheter shaft comprising a distal end and a lumen extending therethrough;
at least one pull wire comprising a distal portion comprising:
a side, wherein the side comprises a first side portion and a second side portion; and
a distal end; and
a distal pull assembly comprising:
a longitudinal axis;
a first surface comprising a radially facing surface; and
a second surface comprising at least in part a substantially distally facing surface, wherein the first side portion of the at least one pull wire is adjacent to the first surface of the distal pull assembly and wherein the second side portion of the at least one pull wire is adjacent to the second surface of the distal pull assembly,
wherein the at least one pull wire extends through the catheter shaft along the longitudinal axis of the distal pull assembly toward the distal end and then extends at least in part in a direction that is non-parallel to the longitudinal axis of the distal pull assembly,
wherein at least a portion of the at least one pull wire extends distal of the second surface of the distal pull assembly, and
wherein the at least one pull wire and the distal pull assembly are configured such that pulling of the at least one pull wire directly imparts force to the distal pull assembly to bend the catheter shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/051,143US20140100566A1 (en) | 2007-12-21 | 2013-10-10 | Medical catheter assembly with deflection pull ring and distal tip interlock |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/963,441US8162934B2 (en) | 2007-12-21 | 2007-12-21 | Medical catheter assembly with deflection pull ring and distal tip interlock |
| US13/453,525US8556893B2 (en) | 2007-12-21 | 2012-04-23 | Medical catheter assembly with deflection pull ring and distal tip interlock |
| US14/051,143US20140100566A1 (en) | 2007-12-21 | 2013-10-10 | Medical catheter assembly with deflection pull ring and distal tip interlock |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/453,525ContinuationUS8556893B2 (en) | 2007-12-21 | 2012-04-23 | Medical catheter assembly with deflection pull ring and distal tip interlock |
Publications (1)
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|---|---|
| US20140100566A1true US20140100566A1 (en) | 2014-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| US11/963,441Expired - Fee RelatedUS8162934B2 (en) | 2007-12-21 | 2007-12-21 | Medical catheter assembly with deflection pull ring and distal tip interlock |
| US13/453,525ActiveUS8556893B2 (en) | 2007-12-21 | 2012-04-23 | Medical catheter assembly with deflection pull ring and distal tip interlock |
| US14/051,143AbandonedUS20140100566A1 (en) | 2007-12-21 | 2013-10-10 | Medical catheter assembly with deflection pull ring and distal tip interlock |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
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| US11/963,441Expired - Fee RelatedUS8162934B2 (en) | 2007-12-21 | 2007-12-21 | Medical catheter assembly with deflection pull ring and distal tip interlock |
| US13/453,525ActiveUS8556893B2 (en) | 2007-12-21 | 2012-04-23 | Medical catheter assembly with deflection pull ring and distal tip interlock |
Country Status (5)
| Country | Link |
|---|---|
| US (3) | US8162934B2 (en) |
| EP (1) | EP2190515B9 (en) |
| JP (1) | JP5449190B2 (en) |
| CN (1) | CN101932357B (en) |
| WO (1) | WO2009082570A1 (en) |
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| CN107148291A (en)* | 2014-11-04 | 2017-09-08 | 皇家飞利浦有限公司 | The purposes of medical treatment device and stay thimble in the apparatus can be manipulated |
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| WO2022218931A3 (en)* | 2021-04-12 | 2022-12-08 | Karl Storz Se & Co. Kg | Shank for a flexible endoscope or for a flexible endoscopic instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5449190B2 (en) | 2014-03-19 |
| EP2190515B9 (en) | 2013-08-28 |
| CN101932357B (en) | 2013-12-25 |
| CN101932357A (en) | 2010-12-29 |
| JP2011507606A (en) | 2011-03-10 |
| EP2190515A4 (en) | 2011-03-16 |
| US8556893B2 (en) | 2013-10-15 |
| US8162934B2 (en) | 2012-04-24 |
| WO2009082570A1 (en) | 2009-07-02 |
| US20090163917A1 (en) | 2009-06-25 |
| EP2190515B1 (en) | 2013-05-29 |
| US20120203170A1 (en) | 2012-08-09 |
| EP2190515A1 (en) | 2010-06-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment | Owner name:ST. JUDE MEDICAL, ATRIAL FIBRILLATION DIVISION, IN Free format text:ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:POTTER, DANIEL J.;REEL/FRAME:033055/0028 Effective date:20080221 | |
| STCB | Information on status: application discontinuation | Free format text:ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |