Impact biopsy device and method of use
First Claim
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1. A tissue biopsy device, comprising:
- a handle configured to be grasped by a user;
a needle assembly comprising a cannula, the needle assembly operably coupled to the handle, the needle assembly configured to sever a tissue sample; and
an actuator assembly operably coupled to the handle and needle assembly, the actuator assembly comprising;
a biasing member;
a traveling member configured to be displaced by the biasing member when the actuator assembly is actuated;
a follower; and
an impact member coupled to the needle assembly, the impact member configured to displace at least a portion of the needle assembly when the traveling member impacts the impact member;
wherein the cannula is fixedly coupled to the follower, the follower is releasably coupled to the impact member, and the follower is configured to decoupled from the impact member such that the impact member travels a longer distance than the follower when the device is actuated.
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Abstract
An impact biopsy device is disclosed. The impact biopsy device may be configured to displace various cutting elements, such as an outer tubular member and cutting element and a cannula to sever a tissue sample from a patient. The impact biopsy device may comprise an actuation system configured to transfer displacement or force to the cutting elements by the impact of an element on another element.
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Citations
26 Claims
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1. A tissue biopsy device, comprising:
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a handle configured to be grasped by a user; a needle assembly comprising a cannula, the needle assembly operably coupled to the handle, the needle assembly configured to sever a tissue sample; and an actuator assembly operably coupled to the handle and needle assembly, the actuator assembly comprising; a biasing member; a traveling member configured to be displaced by the biasing member when the actuator assembly is actuated; a follower; and an impact member coupled to the needle assembly, the impact member configured to displace at least a portion of the needle assembly when the traveling member impacts the impact member; wherein the cannula is fixedly coupled to the follower, the follower is releasably coupled to the impact member, and the follower is configured to decoupled from the impact member such that the impact member travels a longer distance than the follower when the device is actuated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A tissue biopsy device comprising:
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a handle configured to be graspable by a user; a biasing member operably coupled to the handle, the biasing member configured to store potential energy when the biopsy device is in a primed configuration; a traveling member operably coupled to the handle, the traveling member disposed such that the potential energy stored in the biasing member is at least partially converted to kinetic energy associated with the traveling member when the biopsy device is actuated; an impact member operably coupled to the handle and to the biasing member, the device configured such that the traveling member impacts the impact member when the biopsy device is actuated such that the impact member is displaced relative to the handle and; a follower; wherein the impact member is coupled to the follower when the biopsy device is in a primed configuration and wherein the follower is initially displaced with the impact member when the device is actuated and wherein the follower decouples from the impact member such that the follower travels a shorter longitudinal distance than the impact member when the biopsy device is acutated. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of obtaining a tissue sample through actuation of a biopsy device, the method comprising:
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releasing a traveling member such that the traveling member is displaced a first longitudinal distance along the biopsy device; impacting the traveling member with an impact member such that the impact member is displaced a second longitudinal distance along the biopsy device; displacing a follower releasably coupled to the impact member and decoupling the follower from the impact member such that the follower travels a shorter distance the second longitudinal distance; and displacing a first cutting member coupled to the impact member such that the cutting member severs a first portion of the tissue sample. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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Specification