Catheter handle with torque mechanism and valve relief component
A catheter includes a handle with torqueing and steering mechanisms. The torqueing mechanism includes a rotatable nosecone and a bearing coupled to the nosecone to be rotatable therewith. The bearing is concentrically disposed over a shaft of the catheter. The steering mechanism includes a rack coupled to the bearing to be slideable therewith and a pull wire having a proximal end attached to the bearing and a distal end attached to a distal portion of the shaft. Rotation of the nosecone causes an entire length of the shaft to rotate and axial movement of the rack tensions the pull wire to bend the distal portion of the shaft. A valve relief component is slidingly disposed over the shaft and is configured to dock onto the handle when not in use.
1 . A catheter comprising:
a handle; and
a shaft extending from within the handle, the handle including
a housing;
a tubular component disposed within the housing and over the shaft;
a rack disposed within the housing and axially movable relative to the housing of the handle, wherein the tubular component is coupled to the rack such that the tubular component moves axially with the rack and is rotatable relative to the rack; and
a pull wire having a proximal end attached to the tubular component and a distal end attached to a distal portion of the shaft, wherein axial movement of the rack tensions the pull wire to bend the distal portion of the shaft.
2 . The catheter of claim 1 , further comprising an actuator rotatable relative to the housing of the handle, wherein the tubular component is coupled to the actuator such that the tubular component rotates with the actuator and is axially movable relative to the actuator.
3 . The catheter of claim 2 , wherein the actuator is a nosecone.
4 . The catheter of claim 3 , wherein the nosecone includes first and second fingers proximally extending from a proximal end of the nosecone, and wherein the tubular component is coupled to the nosecone via the first and second fingers.
5 . The catheter of claim 4 , wherein the tubular component includes first and second slots, the first and second slots being configured to receive the first and second fingers proximally extending from the proximal end of the nosecone.
6 . The catheter of claim 2 , further comprising a locking mechanism configured to lock a circumferential position of the actuator relative to the housing of the handle.
7 . The catheter of claim 6 , wherein the locking mechanism includes a slider accessible from an exterior of the housing of the handle, the slider having a pointed tip formed at a distal end thereof that is configured to selectively engage one of a plurality of teeth formed on a proximal end surface of the actuator.
8 . The catheter of claim 2 , wherein the tubular component is configured to transmit a torque from the actuator to the shaft when the actuator is rotated via a contoured inner surface of the tubular component.
9 . The catheter of claim 8 , wherein the contoured inner surface includes a plurality of protrusions.
10 . The catheter of claim 9 , wherein a tubular component interface is disposed over a portion of the shaft, the tubular component interface including a plurality of grooves, and wherein the plurality of protrusions are configured to be received within the plurality of grooves.
11 . The catheter of claim 10 , wherein the plurality of protrusions are permitted to slide within the plurality of grooves.
12 . The catheter of claim 2 , wherein rotation of the actuator causes an entire length of the shaft to rotate therewith.
13 . The catheter of claim 2 , wherein the shaft and the actuator are coupled together such that the actuator causes rotation of the shaft.
14 . The catheter of claim 1 , wherein the handle further includes a knob rotatable relative to the housing of the handle, and wherein the knob includes a thread formed on an inner surface thereof and the rack includes a series of protrusions formed on an outer surface thereof that are configured to mate with the thread formed on the inner surface of the knob, and wherein rotation of the knob causes axial movement of the rack and the tubular component coupled thereto.
15 . The catheter of claim 1 , wherein a radial flange is formed on the tubular component and the rack includes a clip extending therefrom, the clip being configured to attach onto the radial flange in order to couple the rack and the tubular component together such that the tubular component moves axially with the rack and is rotatable relative to the rack.
16 . The catheter of claim 1 , further comprising:
a balloon-expandable prosthesis disposed at the distal portion of the shaft;
a component slidingly disposed over an outer surface of the shaft, the component being configured to be selectively disposed over the balloon-expandable prosthesis to protect the balloon-expandable prosthesis during insertion into an introducer sheath; and
a strain relief component concentrically disposed over a portion of the shaft and extending from a distal end of the housing of the handle, wherein the strain relief component is configured to serve as a docking station for the component when the component is not disposed over the balloon-expandable prosthesis.
17 . The catheter of claim 11 , wherein the shaft includes an elongated slot formed in a sidewall thereof, and wherein the pull wire is disposed within a lumen of the shaft and through the elongated slot of the shaft.
18 . A catheter comprising:
a handle; and
a shaft extending from within the handle, the handle including
a housing; and
a torqueing mechanism disposed at least partially within an interior of the housing of the handle, the torqueing mechanism including a nosecone rotatable relative to the housing of the handle and a tubular component coupled to the nosecone to be rotatable therewith, wherein the tubular component is disposed over the shaft,
a steering mechanism disposed at least partially within the interior of the housing of the handle, the steering mechanism including a rack and a pull wire having a proximal end attached to the tubular component and a distal end attached to a distal portion of the shaft, wherein the rack is coupled to the tubular component such that the tubular component is slideable therewith, and
wherein an entire length of the shaft rotates in conjunction with the nosecone and the tubular component rotates relative to the rack during rotation thereof, and
wherein axial movement of the rack tensions the pull wire to bend the distal portion of the shaft and the tubular component slides relative to the shaft and relative to the nosecone during axial movement thereof.
19 . The catheter of claim 18 , wherein the tubular component is configured to transmit a torque from the nosecone to the shaft when the nosecone is rotated.
20 . The catheter of claim 18 , wherein the shaft and the nosecone are coupled together such that the nosecone causes rotation of the shaft.