Apparatuses for manipulating medical devices and related methods for use
Apparatuses for manipulating a collapsible medical device include a sheath, a first shaft including a first grasping member and a second grasping member. The second grasping member is separated from the first grasping member by a distance. The collapsible medical device may be manipulated by actuating the first grasping member and the second grasping member and by increasing the distance between the first grasping member and the second grasping member. Methods of using the apparatuses are provided.
1. An apparatus for manipulating a collapsible medical device, the apparatus comprising:
a sheath having a distal end, the sheath defining a sheath lumen that terminates at a sheath distal opening and that extends axially through at least a portion of the sheath;
a first shaft comprising a first grasping member, the first shaft structured and arranged to slide axially within and relative to the sheath lumen from a delivery configuration to a grasping configuration;
a second grasping member structured and arranged to slide axially relative to the first shaft, the second grasping member separated from the first grasping member by a distance;
a balloon expandable from a deflated configuration to an elongated configuration, the balloon structured and arranged such that expansion of the balloon increases the distance.
2. The apparatus of claim 1 wherein the grasping configuration is a first grasping configuration and wherein the first shaft is structured and arranged to slide axially within and relative to the sheath lumen from the first grasping configuration to a second grasping configuration.
3. The apparatus of claim 1 wherein the expansion of the balloon comprises inflating the balloon with an inflation medium.
4. The apparatus of claim 1 wherein the first grasping member comprises a hinge.
5. The apparatus of claim 1 wherein the first grasping member comprises two jaws.
6. The apparatus of claim 1 wherein the second grasping member comprises a hinge.
7. The apparatus of claim 1 wherein the balloon engages the first grasping member, wherein the balloon is expandable to a first partially expanded configuration in which a first portion of the balloon has a first length, has a first diameter, and is disposed between the first grasping member and the second grasping member, and further in which a second portion of the balloon has a second length, a second diameter, and is disposed proximal of the second grasping member, and wherein the first diameter is greater than the second diameter.
8. The apparatus of claim 7 wherein the balloon is expandable to a second partially expanded configuration wherein the second length is shorter than the second length in the first partially expanded configuration.
9. An apparatus for manipulating a collapsible medical device, the apparatus comprising:
a sheath having a distal end, the sheath defining a sheath lumen that terminates at a sheath distal opening and that extends axially through at least a portion of the sheath;
a first shaft comprising a first grasping member, the first shaft structured and arranged to slide axially within and relative to the sheath lumen from a delivery configuration to a grasping configuration;
a second grasping member structured and arranged to slide axially relative to the first shaft, the second grasping member separated from the first grasping member by a distance;
a balloon expandable from a deflated configuration to an elongated configuration, the balloon structured and arranged such that expansion of the balloon changes the distance; and
wherein a distal portion of the balloon engages the first grasping member, a proximal portion of the balloon engages the second grasping member, and expansion of the balloon causes an increase in the distance separating the first grasping member and the second grasping member.
10. An apparatus for manipulating a collapsible medical device, the apparatus comprising:
a first elongate shaft;
a first grasping member disposed on a distal end region of the first elongate shaft, the first grasping member being actuatable from a delivery configuration to a grasping configuration;
a second grasping member disposed proximal of the first grasping member and configured to slide axially relative to the first elongate shaft, the second grasping member being actuatable from a delivery configuration to a grasping configuration, the second grasping member separated from the first grasping member by a distance;
a balloon arranged between the first grasping member and the second grasping member, wherein expansion of the balloon increases the distance between the first grasping member and the second grasping member.
11. The apparatus of claim 10 , wherein the first grasping member comprises at least two jaws.
12. The apparatus of claim 11 , further comprising one or more pull wires extending along the first elongate shaft, wherein the one or more pull wires are configured to actuate the at least two jaws.
13. The apparatus of claim 10 , wherein the second grasping member is attached to a distal end of a second elongate shaft.
14. The apparatus of claim 13 , wherein the second elongate shaft is slidably disposed around the first elongate shaft.
15. The apparatus of claim 13 , wherein the second grasping member comprises at least two jaws.
16. The apparatus of claim 15 , further comprising one or more pull wires extending along the second elongate shaft, wherein the one or more pull wires are configured to actuate the at least two jaws.