Localization device, delivery devices, systems and methods
Devices, systems, and methods used to deploy a localization device into a target lesion are disclosed. The system includes a delivery device configurable in a ready-to-deploy state and a deployed state. When the delivery device is in the ready-to-deploy state, biased engagement members are engaged with proximal detents of a handle of the delivery device. When the delivery device is in the deployed state, the biased engagement members are engaged with distal detents. The delivery device is transitioned from the ready-to-deploy state to the deployed state by distal displacement of a plunger relative to the handle. The localization device is deployed from a cannula of the delivery device into the target lesion when the delivery device transitions from the ready-to-deploy state to the deployed state.
1 . A delivery device to deliver a localization device, comprising:
a handle to be gripped by a user and comprising:
a bore defined by a wall of the handle;
a proximal detent extending through the wall of the handle; and
a distal detent extending through the wall of the handle,
wherein the distal detent is longitudinally spaced from the proximal detent;
a cannula coupled to the handle and comprising a lumen;
a plunger slidingly disposed within the bore of the handle and comprising an outwardly biased engagement member comprising:
a cantilever arm; and
a catch disposed at an end of the cantilever arm, the catch configured to engage with the proximal detent and the distal detent; and
a deployment rod coupled to the plunger and co-axially disposed within the lumen of the cannula.
2 . The delivery device of claim 1 , wherein the delivery device further comprises a resilient member disposed within the handle to apply a proximally-directed force to the plunger.
3 . The delivery device of claim 1 , wherein the delivery device further comprises a spacer selectively couplable to a distal end of the handle to effectively shorten a length of the cannula.
4 . The delivery device of claim 1 , wherein the proximal and distal detents comprise windows through the wall to allow visualization of the biased engagement member when the biased engagement member is engaged with the proximal and distal detents.
5 . The delivery device of claim 1 , wherein the cannula comprises:
a retention tab disposed proximal to a distal end of the cannula to retain the localization device within the lumen of the cannula prior to deployment of the localization device from the delivery device; and
a cannula window disposed proximal to the retention tab to allow visualization of the localization device within the lumen of the cannula prior to deployment of the localization device from the delivery device.
6 . The delivery device of claim 1 , wherein the biased engagement member comprises:
the cantilever arm coupled to an elongate body; and
the catch disposed at a proximal end of the cantilever arm to engage with the proximal and distal detents of the handle,
wherein the catch comprises:
a distal face oriented at an angle to a longitudinal axis of the elongate body to prevent the plunger from being distally displaced; and
a proximal face oriented perpendicular relative to the longitudinal axis of the elongate body to allow the plunger to be displaced from engagement with the proximal detent to engagement with the distal detent.
7 . The delivery device of claim 1 , wherein the delivery device is in a ready-to-deploy state when the biased engagement member is engaged with the proximal detent, and
wherein the delivery device is in a deployed state when the biased engagement member is engaged with the distal detent.
8 . The delivery device of claim 1 , wherein the localization device is deployed from the delivery device in axial alignment with the delivery device.
9 . The delivery device of claim 2 , wherein the proximally-directed force applied to the plunger is configured to cooperate with an outward force applied by the outwardly biased engagement member so as to maintain engagement of the catch with the proximal detent or the distal detent.
10 . The delivery device of claim 1 , further comprising a resilient member configured to apply a proximally-directed force to the plunger such that the catch is prevented from disengaging with the proximal detent or the distal detent.