Medical device locking assemblies and methods of using the same
A medical device that includes a handle, a sheath extending from the handle, and a tool within the sheath and movable relative to the sheath. The handle includes an inner body and an outer body disposed over the inner body. The outer body is movable relative to the inner body. The handle includes a first actuator secured to the tool. The first actuator has an actuated state permitting movement of the tool relative to the sheath in response to moving the outer body relative to the inner body. The handle includes a second actuator secured to the sheath. The second actuator has an actuated state permitting movement of the sheath relative to the tool in response to moving the second actuator relative to the outer body. An unactuated state of the first actuator and an unactuated state of the second actuator prevents movement of the tool relative to the sheath.
1 . A handle of a medical device, comprising:
an outer body;
an inner body, wherein at least a portion of the inner body is movably disposed within the outer body;
an actuator, wherein the actuator has an actuated state permitting movement of the outer body relative to the inner body; and
a biasing mechanism disposed between the actuator and the outer body and within a cavity of the outer body, wherein the biasing mechanism is configured to (i) bias the actuator radially outward relative to the outer body and (ii) bias the actuator towards an unactuated state;
wherein the unactuated state of the actuator inhibits movement of the outer body relative to the inner body.
2 . The handle of claim 1 , further comprising:
a sheath extending from the handle; and
a tool movably disposed within the sheath, wherein the actuator is secured to the tool, and wherein the actuated state of the actuator permits movement of the tool relative to the sheath, and wherein the unactuated state of the actuator inhibits movement of the tool relative to the sheath.
3 . The handle of claim 2 , wherein the tool is a needle.
4 . The handle of claim 1 , wherein the actuator is a first actuator and the biasing mechanism is a first biasing mechanism, and wherein the handle comprises a second actuator and a second biasing mechanism, wherein the second biasing mechanism is disposed between the second actuator and the outer body, and wherein the second biasing mechanism is configured to (i) bias the second actuator radially outward relative to the outer body and (ii) bias the second actuator towards an unactuated state.
5 . The handle of claim 4 , wherein longitudinal movement of the first actuator moves the outer body longitudinally relative to the second actuator, and wherein longitudinal movement of the second actuator is configured to move a sheath longitudinally relative to the inner body and the outer body.
6 . The handle of claim 4 , further comprising:
a sled including an aperture;
a retainer including a protrusion that is received within the aperture to couple the retainer to the sled, wherein the second biasing mechanism is disposed between the second actuator and the retainer, wherein the second biasing mechanism is configured to bias the second actuator radially outward relative to the retainer and maintain the second actuator in the unactuated state.
7 . The handle of claim 6 , wherein an engagement feature of the retainer is received within the aperture.
8 . The handle of claim 1 , wherein the inner body includes a plurality of teeth extending along a portion of the inner body; and
wherein the actuator includes one or more teeth disposed entirely radially within a housing of the actuator, wherein the one or more teeth are of the actuator are configured to engage one or more of the plurality of teeth of the inner body when in the unactuated state.
9 . The handle of claim 8 , wherein the plurality of teeth of the inner body is disposed on a first side of the inner body, and wherein the biasing mechanism is disposed on a second side of the inner body, opposite the first side.
10 . The handle of claim 1 , wherein the biasing mechanism is a spring.
11 . The handle of claim 1 , wherein the inner body extends proximally relative to the outer body.
12 . The handle of claim 1 , wherein the actuator includes a button.
13 . The handle of claim 1 , wherein the inner body includes a pair of slots, wherein each slot of the pair of slots extends longitudinally along the inner body, wherein each slot of the pair of slots is positioned on an opposite side of the inner body, wherein the pair of slots is configured to slidably receive the actuator.
14 . The handle of claim 1 , further comprising a rotation assembly coupled to the outer body, wherein the rotation assembly is configured to rotate a medical instrument relative to the inner body and the outer body.
15 . A handle of a medical device, comprising:
a first body;
a second body, wherein at least a portion of the second body is movably disposed within the first body;
an actuator, wherein the actuator has an actuated state permitting movement of the first body relative to the second body and an unactuated state inhibiting movement of the first body relative to the second body, wherein the actuator is configured to engage with the second body in the unactuated state;
a spring disposed between the actuator and the second body and within a cavity of the first body, wherein the spring is configured to (i) bias the actuator radially outward relative to the first body and (ii) bias the actuator towards an unactuated state.
16 . The handle of claim 15 , further comprising:
a sheath extending from the handle; and
a needle movably disposed within the sheath, wherein the actuator is secured to the needle, and wherein the actuated state of the actuator permits movement of the needle relative to the sheath, and wherein the unactuated state of the actuator inhibits movement of the needle relative to the sheath.
17 . The handle of claim 15 , wherein the actuator includes one or more teeth disposed entirely radially within a housing of the actuator,
wherein the second body includes a plurality of teeth extending along a portion of the second body, wherein the plurality of teeth of the second body is disposed on a first side of the second body, and wherein the spring is disposed on a second side of the second body, opposite the first side, and
wherein, in the unactuated state, the one or more teeth of the actuator are configured to engage one or more of the plurality of teeth of the second body in the unactuated state.
18 . The handle of claim 15 , wherein the actuator is a first actuator and the spring is a first spring, and wherein the handle comprises a second actuator and a second spring, wherein the second spring is disposed between the second actuator and the first body, and wherein the second spring is configured to (i) bias the second actuator radially outward relative to the first body and (ii) bias the second actuator towards an unactuated state.
19 . A medical device, comprising:
a handle;
a sheath extending from the handle; and
a needle within the sheath and movable relative to the sheath;
wherein the handle includes:
an inner body;
an outer body disposed over the inner body, wherein the outer body is movable relative to the inner body;
an actuator, wherein the actuator has an actuated state permitting movement of the outer body relative to the inner body and an unactuated state inhibiting movement of the outer body relative to the inner body, wherein the actuator is configured to engage the outer body in the unactuated state, and wherein the unactuated state of the actuator inhibits movement of the needle relative to the sheath; and
a spring disposed between the actuator and the outer body and within a cavity of the outer body, wherein the spring is configured to (i) bias the actuator radially outward relative to the outer body and (ii) bias the actuator towards an unactuated state.
20 . The handle of claim 19 , wherein the actuator includes a button.