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Flexible biopsy needle

a biopsy needle and flexible technology, applied in the field of medical needles, can solve the problems of difficult to advance the penetrating/collecting distal end portion through and out of the sheath, and the needle is often considered stiff and unwieldy,

Inactive Publication Date: 2013-01-03
COOK MEDICAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes an endoscopic needle that can sample tissue from patients. The needle has a distal part made of metal and a proximal part made of plastic. The metal part of the needle can be fixed inside the plastic part, and the distal part has a cutting edge to remove tissue from a patient. This design allows for better tissue sampling and easier handling of the needle during use.

Problems solved by technology

However, these needles are often considered stiff and unwieldy by some users who find them difficult to insert fully into, for example, a working channel of an endoscopic ultrasound (EUS) endoscope.
In addition, as these needles typically include an outer sheath, it may be difficult to advance the penetrating / collecting distal end portion through and out of the sheath.
These challenges may be particularly problematic when a user is attempting to access more difficult-to-reach anatomical locations (such as, for example, attempting to access the head of a patient's pancreas from the duodenum).

Method used

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Examples

Experimental program
Comparison scheme
Effect test

embodiment 180

[0022]FIG. 1A shows a stylet embodiment 180 configured to provide or enhance distal flexibility of a needle that the stylet is supporting. The elongate shaft body of the stylet 180 has a first outer diameter portion 183 that may have about the same or slightly smaller diameter than the inner diameter of a needle lumen, in the manner typical of needle stylets in the art. A distal end portion 185 of the stylet body 180 may include a reduced diameter (compared to the larger outer diameter portion 183) that will still provide support for the needle, but that will provide reduced stiffness and improved navigability through, for example, an endoscope working lumen.

embodiment 190

[0023]FIG. 1B shows a stylet embodiment 190 configured to provide or enhance distal flexibility of a needle that the stylet is supporting. The elongate shaft body of the stylet 190 has a first larger-outer-diameter (“OD”) portion 194 and a second larger-OD portion 196 that each may have about the same or slightly smaller diameter than the inner diameter of a needle lumen, in the manner typical of needle stylets in the art. A distal end intermediate length 195 of the stylet body 190 is disposed between the first and second larger-OD portions 194, 196. The intermediate length 195 includes a reduced diameter (i.e., smaller than one or both of the first and second larger-OD portions 194, 196) that will still provide support for the needle, but that will provide reduced stiffness and improved navigability through, for example, an endoscope working lumen. The first larger-OD portion 194 and the second larger-OD portion 196 each will have a larger outer diameter than the intermediate porti...

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PUM

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Abstract

An endoscopic tissue-sampling needle includes an elongate needle shaft having a proximal and a distal shaft portion. The proximal shaft portion includes an inner tubular core that may be constructed of a same material as the distal shaft potion, having a longer length and a smaller outer diameter than the distal shaft portion. The distal shaft portion extends into and is fixedly attached to an inner diameter of a distal shaft portion lumen. The distal shaft portion lumen is configured for collection of patient tissue, with a distal penetrating tip and / or a side aperture with a cutting edge configured to excise tissue from a target site in a patient body. The proximal shaft portion includes polymer coating around the inner tubular core, which is configured to provide an outer diameter for the proximal shaft portion that may be substantially the same as the outer diameter of the distal shaft portion.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to U.S. Provisional Application Ser. No. 61 / 502,086, filed Jun. 28, 2011, which is incorporated herein by reference in its entirety.TECHNICAL FIELD[0002]The invention relates generally to medical needles. More particularly, the invention pertains to medical needles configured for ultrasound-guided endoscopic biopsy.BACKGROUND[0003]Endoscopists have developed great expertise in using elongate needles, including echogenic needles viewable under ultrasound, to obtain samples from patients in a minimally invasive manner. In particular, they use devices and techniques that allow carefully targeted collection of samples from deep in patient bodies without any external percutaneous incisions or punctures. Devices such as fine needle aspiration needles and fine needle biopsy needles may be directed through a working channel of an endoscope (e.g., duodenoscope, gastrointestinal end-viewing endoscope) to a target si...

Claims

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Application Information

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IPC IPC(8): A61B10/02
CPCA61B10/0275A61B10/0283A61B17/32053A61B2017/3413A61B2010/045A61B2017/0034A61B2010/0093A61B10/04A61B1/018A61B1/2733A61B1/2736A61B8/481A61B17/3496
Inventor TOOMEY, CIARANMCGRATH, DARACHCLANCY, MICHAELCAMPBELL, TRIONA
Owner COOK MEDICAL TECH LLC