Sample retrieval tool with compliant retention member
The embodiments described herein can be used in a variety of sample retrieval, grasping, cutting, and manipulating operations. In some embodiments, an apparatus includes an elongated member and a retention member movably coupled to the elongated member. The elongated member includes a cutting portion configured to cut a target sample when moved, and defines an internal volume within which at least a portion of the target sample can be received. The retention member includes an engagement portion configured to move between a first position and a second position when the retention member is actuated. The engagement portion is configured to extend within the internal volume to exert a force on the target sample within the internal volume when the engagement portion is in the second position.
1 . A method, comprising:
producing, in a material sheet when the material sheet is in a planar configuration, a side wall of a sample retrieval tool, the side wall including a retention member, the retention member includes an engagement portion and an actuation portion, the engagement portion includes a flexure at a proximal end portion of the engagement portion, the side wall defining a first notch that surrounds a portion of the retention member except for the flexure,
the retention member defining a second notch that surrounds a portion of the actuation portion, and the engagement portion configured to move relative to the side wall;
after the producing, rolling the material sheet such that an end portion of the side wall defines an internal volume within which at least a portion of a target sample can be received; and
after the rolling, joining a first side of the material sheet to a second side of the material sheet.
2 . The method of claim 1 , wherein:
the producing the side wall includes removing material from the material sheet to define the first notch; and
removing material from the material sheet to define the second notch.
3 . The method of claim 2 , wherein:
the removing material from the material sheet is performed via an electrical discharge machining process.
4 . The method of claim 1 , wherein:
the rolling includes forming a cylinder that defines the internal volume.
5 . The method of claim 1 , further comprising:
deforming the actuation portion of the retention member relative to the engagement portion of the retention member.
6 . The method of claim 1 , wherein the actuation portion includes a connector, the method further comprising:
coupling an end portion of an actuator to the connector of the actuation portion such that the end portion of the actuator is within the internal volume.
7 . The method of claim 1 , wherein the material sheet is constructed from a nickel titanium alloy.
8 . The method of claim 1 , wherein:
the producing the side wall of the sample retrieval tool includes producing the side wall with a second retention member, the second retention member being monolithically constructed with the side wall.