Minimally-invasive delivery systems
A tool ( 410 ) for use with an implant ( 20 ) includes a housing ( 426 ) and a controller ( 440 ). The housing includes a tubular wall ( 428 ) that circumscribes a longitudinal axis; is dimensioned to house at least part of the implant; and defines a track ( 430 ) that follows a generally-helical path around the longitudinal axis. The controller includes a rod ( 442 ) that extends from a proximal part of the tool to the housing; and an actuator ( 444 ). The actuator is fixedly coupled to the rod, includes an engaging element ( 446 ) that engages the track, and is rotatable with respect to the housing. The controller and the housing mechanically cooperate such that rotation of the actuator with respect to the housing slides the housing longitudinally with respect to the actuator. Other embodiments are also described.
1. Apparatus, for use with an implant, the apparatus comprising a tool, the tool comprising:
a housing, at a distal part of the tool, the housing:
comprising a tubular wall that circumscribes a longitudinal axis of the distal part of the tool,
dimensioned to house at least part of the implant, and
defining:
a first track that follows a generally-helical path around the longitudinal axis, and
a second track that follows a generally-linear path parallel to the longitudinal axis;
a shaft to which the implant is fixable, the shaft being slidably coupled to the housing,
and extending proximally from the housing, and
a controller, comprising:
a rod that extends from a proximal part of the tool to the housing; and
an actuator, fixedly coupled to the rod, comprising:
a first engaging element that engages the first track, and is rotatable with respect to the housing,
a second engaging element that engages the second track such that the shaft is rotationally fixed with respect to the housing;
the controller and the housing mechanically cooperating such that rotation of the actuator with respect to the housing:
slides the housing longitudinally with respect to the actuator.
2. The apparatus according to claim 1 , wherein:
the housing is a proximal housing, and the part of the implant is a first part of the implant;
the proximal housing is configured to house the first part of the implant, and has a distal opening for deployment of the first part of the implant therethrough; and
the tool further comprises a distal housing that is configured to house a second part of the implant, and has a proximal opening for deployment of the second part of the implant therethrough, the proximal opening of the distal housing facing the distal opening of the proximal housing.
3. The apparatus according to claim 1 , wherein the housing is dimensioned to house at least the part of the implant such that at least the part of the implant is coincident along the longitudinal axis with at least part of the first track.
4. The apparatus according to claim 1 , wherein the housing is dimensioned to house at least the part of the implant such that the generally-helical path around the longitudinal axis is also around at least the part of the implant, and at least part of the first track follows the generally-helical path around the longitudinal axis and at least the part of the implant.
5. The apparatus according to claim 1 , wherein:
the tool further comprises a catheter,
the rod extends through the catheter,
the controller and the housing mechanically cooperate such that rotation of the actuator with respect to the housing slides the housing proximally along and over part of the catheter.
6. The apparatus according to claim 1 , wherein the controller and the housing mechanically cooperate such that rotation of the actuator in a first direction with respect to the housing slides the housing proximally with respect to the actuator, and rotation of the actuator in a second, opposite direction with respect to the housing slides the housing distally with respect to the actuator.
7. The apparatus according to claim 1 , wherein the first track is a channel, and the first engaging element is a spur that engages the first track by protruding into the channel.
8. The apparatus according to claim 1 , wherein the first track is a rail, and the first engaging element is a notch that engages the first track by receiving the rail.
9. The apparatus according to claim 1 , wherein:
a first portion of the generally-helical path has a first pitch,
a second portion of the generally-helical path has a second pitch, the second portion being distal to the first portion, and the second pitch being greater than the first pitch, and
the first track follows the generally-helical path that has the first portion that has the first pitch and the second portion that has the second pitch.
10. The apparatus according to claim 1 , wherein:
the generally-helical path has a pitch that is progressively greater at progressively distal portions of the generally-helical path, and
the first track follows the generally-helical path that has the pitch that is progressively greater at progressively distal portions of the generally-helical path.
11. The apparatus according to claim 1 , further comprising the implant.
12. The apparatus according to claim 1 , wherein the controller and the housing mechanically cooperate such that rotation of the actuator with respect to the housing slides the second track longitudinally with respect to the second engaging element.
13. The apparatus according to claim 1 , further comprising the implant, fixedly coupled to the shaft, at least the part of the implant housed by the housing.
14. The apparatus according to claim 1 , wherein the rod is coaxial with the shaft.
15. The apparatus according to claim 14 , wherein the shaft is disposed within the rod.
16. The apparatus according to claim 1 , wherein the actuator defines a hole through which the shaft extends.
17. The apparatus according to claim 1 , wherein the shaft is rotationally fixed with respect to the housing.
18. The apparatus according to claim 1 , wherein at least part of the shaft is disposed within the housing.
19. Apparatus, for use with an implant, the apparatus comprising a tool, the tool comprising:
a catheter;
a housing, at a distal part of the tool, the housing:
comprising a tubular wall that circumscribes a longitudinal axis of the distal part of the tool,
dimensioned to house at least part of the implant, and
defining a track that follows a generally-helical path around the longitudinal axis; and
a controller, comprising:
a rod that extends from a proximal part of the tool to the housing, the rod extending through the catheter; and
an actuator, fixedly coupled to the rod, comprising an engaging element that engages the track, and rotatable with respect to the housing, the controller and the housing mechanically cooperating such that rotation of the actuator with respect to the housing slides the housing proximally along and over part of the catheter.
20. The apparatus according to claim 19 , wherein:
the housing is a proximal housing, and the part of the implant is a first part of the implant;
the proximal housing is configured to house the first part of the implant, and has a distal opening for deployment of the first part of the implant therethrough; and
the tool further comprises a distal housing that is configured to house a second part of the implant, and has a proximal opening for deployment of the second part of the implant therethrough, the proximal opening of the distal housing facing the distal opening of the proximal housing.
21. The apparatus according to claim 19 , wherein the track is a channel, and the engaging element is a spur that engages the track by protruding into the channel.
22. The apparatus according to claim 19 , wherein the housing is dimensioned to house at least the part of the implant such that the generally-helical path around the longitudinal axis is also around at least the part of the implant, and at least part of the track follows the generally-helical path around the longitudinal axis and at least the part of the implant.
23. The apparatus according to claim 19 , wherein:
a first portion of the generally-helical path has a first pitch,
a second portion of the generally-helical path has a second pitch, the second portion being distal to the first portion, and the second pitch being greater than the first pitch, and
the track follows the generally-helical path that has the first portion that has the first pitch and the second portion that has the second pitch.
24. The apparatus according to claim 19 , wherein:
the generally-helical path has a pitch that is progressively greater at progressively distal portions of the generally-helical path, and
the track follows the generally-helical path that has the pitch that is progressively greater at progressively distal portions of the generally-helical path.
25. The apparatus according to claim 19 , further comprising the implant.
26. The apparatus according to claim 19 , wherein the rod is coaxial with the shaft.
27. The apparatus according to claim 26 , wherein the shaft is disposed within the rod.
28. The apparatus according to claim 19 , wherein the actuator defines a hole through which the shaft extends.
29. The apparatus according to claim 19 , wherein the shaft is rotationally fixed with respect to the housing.
30. The apparatus according to claim 19 , wherein at least part of the shaft is disposed within the housing.