Biopsy device with variable speed cutter advance
First Claim
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1. A biopsy device comprising:
- an outer cannula having a lateral tissue receiving port;
an inner tubular cutter disposed for translation within the cannula;
a rotating member having a screw thread feature of varying pitch, wherein the rotating member is operatively associated with the cutter for varying the translational speed of the cutter as the tissue cutter is advanced in relation to the tissue receiving port.
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Abstract
A biopsy device having a translating and rotating cutter is disclosed. The translational speed of the cutter is varied using a variable pitch member. The variable pitch member can include a shaft having a relatively coarse threaded portion for rapid cutter advance and a relatively finer threaded portion for cutter advance during tissue severing.
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Citations
20 Claims
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1. A biopsy device comprising:
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an outer cannula having a lateral tissue receiving port; an inner tubular cutter disposed for translation within the cannula; a rotating member having a screw thread feature of varying pitch, wherein the rotating member is operatively associated with the cutter for varying the translational speed of the cutter as the tissue cutter is advanced in relation to the tissue receiving port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A biopsy device comprising:
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a cannula having a lateral tissue receiving port; a tissue cutter disposed coaxially with the cannula, the cutter adapted for translation relative to the cannula; and a variable pitch member operatively associated with the tissue cutter for providing variation in the translational speed of the tissue cutter as the tissue cutter is advanced in relation to the tissue receiving port. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A biopsy device comprising:
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an outer cannula having a lateral tissue receiving port; an inner tubular cutter disposed for translation within the cannula; a rotating member having a screw thread feature of varying pitch, wherein the rotating member is operatively associated with the cutter for varying the translational speed of the cutter, and wherein the rotating member is adapted to rotate without translation of the cutter in at least one position of the cutter. - View Dependent Claims (20)
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Specification