Handheld tool extender
A medical instrument includes a tool extender used to retain and move a tool relative to a flexible elongate device. The tool extender includes a slider that allows a user to move the tool relative to a flexible elongate device with one hand using a portion of the slider that is configured to be engaged and manipulated by the user's hand or fingers. A portion of the slider is attached to the tool shaft such that moving the slider moves the tool relative to the tool extender and to the flexible elongate device.
1 . A tool extender comprising:
an elongated housing including a channel extending through the elongated housing, and wherein the elongated housing is configured to be stationarily attached to a tool insertion port of a flexible elongate device;
a slot extending along at least a portion of a length of the elongated housing; and
a slider including a first portion disposed in the channel and a second portion disposed on an external surface of the elongated housing, wherein the first portion and the second portion of the slider are connected through the slot of the elongated housing, and wherein the first portion of the slider is configured to be engaged with a shaft of a tool positioned within the channel of the elongated housing to cause, by movement of the slider, a corresponding axial movement of the tool within and relative to the flexible elongate device.
2 . The tool extender of claim 1 , wherein moving the slider along the length of the elongated housing correspondingly moves the tool relative to the elongated housing.
3 . The tool extender of claim 1 , wherein the slider is configured to be axially fixed to the shaft of the tool.
4 . The tool extender of claim 3 , wherein the slider is engaged with the shaft of the tool via one of an elastic compression fitting and an adjustable elastic compression fitting.
5 . The tool extender of claim 1 , further comprising an elastic compression fitting coupled to the elongated housing and configured to apply a retention force to the shaft of the tool.
6 . The tool extender of claim 1 , wherein the slider extends at least partially around the elongated housing and is configured to be grasped by a user's hand.
7 . The tool extender of claim 1 , wherein the elongated housing is configured to be grasped by one or more fingers of a user's hand and the slider is configured to be grasped by one or more other fingers to move the slider relative to the elongated housing.
8 . The tool extender of claim 1 , further comprising a lock configured to maintain a position of the slider relative to the elongated housing when the lock is in a locked configuration.
9 . The tool extender of claim 1 , further comprising a sleeve arranged between the shaft of the tool and an internal surface of the slider, wherein the sleeve is configured to permit rotation of the slider relative to the shaft of the tool.
10 . The tool extender of claim 1 , wherein a longitudinal axis of the slider is aligned with a longitudinal axis of the elongated housing.
11 . The tool extender of claim 1 , wherein the flexible elongate device is a catheter or an endoscope.
12 . The tool extender of claim 1 , wherein the slot extends along only a portion of the length of the elongated housing and constrains maximum relative motion between the slider and the elongated housing.
13 . The tool extender of claim 1 , wherein the slot prevents relative rotational movement between the elongated housing and the slider.
14 . The tool extender of claim 1 , wherein the slot is enclosed by exterior surface of the elongated housing.
15 . A method for controlling movement of a medical instrument, the method comprising:
positioning a tool in an elongated housing stationarily attached to a tool insertion port of a flexible elongate device, wherein the tool extends into a first channel extending through the flexible elongate device of a medical instrument;
retaining the tool in a slider that is slidingly disposed in a second channel extending through the elongated housing; and
moving the slider relative to the elongated housing while maintaining an axial position of the flexible elongate device relative to the elongated housing to axially move the tool within and relative to the flexible elongate device.
16 . The method of claim 15 , further comprising fixing the slider axially to a shaft of the tool.
17 . The method of claim 16 , further comprising engaging the slider with a shaft of the tool via one of an elastic compression fitting and an adjustable elastic compression fitting.
18 . The method of claim 15 , further comprising coupling an elastic compression fitting to the elongated housing to apply a retention force to a shaft of the tool.
19 . A medical instrument comprising:
a flexible elongate device including a first channel extending through a flexible elongated body of the flexible elongate device;
a tool extender stationarily coupled to a tool insertion port of the flexible elongate device, the tool extender comprising:
an elongated housing having a second channel extending through the elongated housing,
a slot extending along at least a portion of a length of the elongated housing; and
a slider including a first portion disposed in the second channel and a second portion disposed on an external surface of the elongated housing, wherein the first portion and the second portion of the slider are connected through the slot of the elongated housing, and wherein the first portion of the slider is configured to be engaged with a shaft of a tool positioned within the second channel of the elongated housing and the first channel of the flexible elongate device to cause, by movement of the slider, a corresponding axial movement of the tool within and relative to the flexible elongate device.
20 . The medical instrument of claim 19 , wherein moving the slider along the length of the elongated housing correspondingly moves the tool relative to the elongated housing.