Medical device locking assemblies and methods of using the same

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.

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.