Biopsy device needle set

Abstract

Provided is a needle set for use in a biopsy device, where the needle set includes a plurality of annularly nested cannulae. Each of the cannulae has a distal end, a proximal end, a lumen, and a cannula body. At least two of the cannulae are joined at their proximal ends. The distal ends of the two joined cannulae are mountable in a biopsy device. At least one of the two joined cannulae further have at least two flexible linkages joining the cannula body to its proximal end. Upon rotating the cannula body around its longitudinal axis while fixing the proximal end, the linkages present therebetween will contact one another, effectively cutting the luminal space between the cannula body and the proximal end of the cannula, thereby also cutting any material, for example biopsy material, present in the lumen.

Description

[0001] Cross References to Related Applications [0002] This application claims priority under 35 U.S.C 119(e) to U.S. Provisional Patent Application Nos. 61 / 181933 and 61 / 182695, filed May 28, 2009, The U.S. Provisional Patent Application 61 / 182,695 has a filing date of May 30, 2009, both of which are incorporated herein by reference in their entirety. technical field [0003] The present invention generally relates to needle sets for biopsy devices. Background technique [0004] It is often desirable and often absolutely necessary to sample or test a portion of tissue from humans and even animals in order to aid in the diagnosis and treatment of patients with cancerous tumors, premalignant conditions and other diseases or disorders. Often, in the case of cancer or suspected malignancy, a very important procedure called a biopsy is performed in order to determine whether the cells are cancerous. [0005] Biopsies can be performed by open or closed techniques. An open bi...

AI Technical Summary

Problems solved by technology

These reports suggested that a bad sample cut / hold mechanism could lead to sample failure

[0011] Additionally, existing biopsy devices may cut only a portion of the cross-sectional area of ​​a tissue sample, which may require tearing the remainder of the cross-sectional area of ​​the sample, which may then result in the potential loss of a portion of the sample

[0012] Also, conventional biopsy devices will have sensitive and easily damaged components that are subject to relatively high forces associated with tissue penetration and placement of the needle set at the sample retrieval site and retrieval of the biopsy sample

Therefore, damage may occur to common biopsy devices, making them less effective or ineffective

For example, some existing biopsy devices include windows or other complex structures in the needle set that can trap tissue therein, making capture and withdrawal of the biopsy sample difficult

Images