Rotating soft tissue biopsy needle

Details Rotating soft tissue biopsy needle Rotating soft tissue biopsy needle

2004-07-29

2009-10-27

Hindenburg, Max (Department: 3736)

Surgery

Diagnostic testing

Sampling nonliquid body material

Reexamination Certificate

active

07608048

ABSTRACT:
In one embodiment, a biopsy needle that is particularly suited for shearing and collecting soft tissue specimens is provided and is formed of an inner tube with a snare at a distal end thereof, an outer cannula, a stylet and a handle assembly. In one aspect of the present invention, the handle assembly includes a spring loaded mechanism described in greater detail below that permits the user to selectively actuate the biopsy needle so that the outer cannula and the inner tube are rapidly advanced beyond the stylet to provide a shearing action of the soft tissue specimen. In one exemplary embodiment, the rapid advancement of the needle to achieve appropriate shear/cutting forces and to facilitate specimen transit into the needle is accomplished by a first spring loaded mechanism. A second spring loaded mechanism is automatically actuated after actuation of the first spring loaded mechanism and serves to rotate the inner tube relative to the outer cannula resulting in actuation of the snare coil.

REFERENCES:
patent: 5617874 (1997-04-01), Baran
patent: 6015391 (2000-01-01), Rishton et al.

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