Torque devices for use with intravascular devices and associated systems and methods
Torque devices for use with intravascular devices and associated systems and methods are disclosed. In some embodiments, a torque device for use with an intravascular device includes a first component having a body defining a tapered opening for receiving a proximal portion of the intravascular device, a first arm extending from the body, and a second arm extending from the body; and a second component movably coupled to the first component, wherein the second component is movable relative to the first component between an open position where the torque device is configured to slidably receive the proximal portion of the flexible elongate member between the first and second arms of the first component and a closed position where the torque device fixedly engages the proximal portion of the flexible elongate member between first and second arms of the first component.
1. An intravascular system, comprising:
an intravascular device comprising:
a flexible elongate member having a proximal portion and a distal portion;
at least one sensing element secured to the distal portion of the flexible elongate member; and
at least one communication line extending from the at least one sensing element to the proximal portion of the flexible elongate member; and
a torque device configured to selectively interface with the proximal portion of the flexible elongate member, the torque device including a first component and a second component, wherein the first component forms a distal end of the torque device and comprises:
a first body defining an opening for receiving a proximal end of the flexible elongate member;
a first arm extending from the first body; and
a second arm extending from the first body, wherein the second component is movably coupled to the first component and forms a proximal end of the torque device, the second component having:
a second body configured to be gripped by a user, wherein the second component is movable relative to the first component between:
an open position where the torque device is configured to slidably receive the proximal portion of the flexible elongate member between the first arm and the second arm of the first component; and
a closed position where the torque device fixedly engages the proximal portion of the flexible elongate member between the first and second arm of the first component, wherein the first component and the second component are configured to be threaded together via engagement between:
a groove in the second body of the second component; and
a single thread wrapped around the first arm and the second arm of the first component, wherein the groove and the single thread selectively control a relative displacement between the first arm and the second arm such that the torque device is configured to exert a plurality of amounts of grip on the intravascular device.
2. The system of claim 1 , wherein the first arm includes a recess sized and shaped to receive and engage the proximal portion of the flexible elongate member.
3. The system of claim 2 , wherein the second arm includes a planar surface to engage the proximal portion of the flexible elongate member.
4. The system of claim 1 , wherein the first body further includes a central lumen in communication with the tapered opening, the central lumen of the first body sized and shaped to slidably receive the proximal portion of the flexible elongate member.
5. The system of claim 1 , wherein the second component is further configured to couple to the first component via a snap-fit engagement.
6. The system of claim 5 , wherein the first component includes a tapered flange and the second component includes at least one projection to facilitate the snap-fit engagement with the tapered flange of the first component.
7. The system of claim 6 , wherein the at least one projection extends inwardly towards a central lumen of the second component.
8. The system of claim 5 , wherein a rotation of the second component relative to the first component through the engagement between the groove and the single thread moves the second component between the open position and the closed position.
9. The system of claim 1 , wherein the at least one sensing element includes at least one of a pressure sensor, a flow sensor, or an intravascular imaging component.
10. The system of claim 1 , wherein the first portion of the second body comprises a first plurality of radial projections extending longitudinally along the second body and separated from one another along the second body by a first spacing, wherein the second portion of the second body comprises a second plurality of radial projections extending longitudinally along the second body and separated from one another along the second body by a second spacing different than the first spacing.
11. The system of claim 1 , wherein, in the closed position:
the first portion of the second body is configured to permit a first amount of rotation of the intravascular device when gripped by the user; and
the second portion of the second body is configured to permit a second amount of rotation of the intravascular device when gripped by the user, wherein the second amount of rotation is different than the first amount of rotation.
12. The system of claim 1 , wherein the torque device includes only the first component and the second component.
13. The system of claim 1 , wherein the single thread and the groove each extend less than 360 degrees around a circumference.
14. The system of claim 1 , wherein the torque device fixedly engages the proximal portion of the flexible elongate member over only a single contact area, the single contact area being disposed between the first arm and the second arm of the first component and having a length of at least 0.33 inches.
15. The system of claim 1 , wherein the opening of the first body is tapered.
16. The system of claim 1 , wherein the single thread comprises a first thread portion on the first arm and a different, second thread portion on the second arm.