Surgical biopsy instrument

a biopsy instrument and surgical technology, applied in the field of medical devices, can solve the problems that the cost of manufacturing such a device probably precludes disposable use, and achieve the effects of less trauma, enhanced rigidity and strength of the distal end of the stylet, and greater assurance of tip stability

Inactive Publication Date: 2005-08-16
CAREFUSION 2200 INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0010]The biopsy needle is rendered less traumatic by restricting the distance between the most distal point of the stylet and the most distal face of the tissue sample notch. This means that the stylet need be advanced only slightly beyond the intended sample to accommodate the distal tip (i.e. the distance between the distal tip and the most distal face...

Problems solved by technology

Though probably somewhat easier to operate, the cost of manufacturing such a devic...

Method used

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  • Surgical biopsy instrument
  • Surgical biopsy instrument
  • Surgical biopsy instrument

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Embodiment Construction

[0021]FIG. 1 is a frontal plan view of a surgical instrument, often called biopsy needle, made and used in accordance with the preferred mode of the present invention. Those of skill in the art will be readily able to apply the teachings found herein to yet other embodiments within the scope of the present invention.

[0022]To be inserted into the patient is long thin stainless steel canula 12. Although not seen in this view, canula 12 is hollow, having a central lumen containing a longitudinally slidable stylet which is described in greater detail below. Of particular interest is distal tip 14 which is also described in greater detail below and shown in close up in FIG. 6.

[0023]The proximal end of canula 12 is coupled to preloading engagement assembly 16 to permit retraction and advancement of canula 12 with respect to main housing 22, which are preferably molded of a suitable polymer for disposability. Before insertion, the surgical instrument is preloaded by manually pulling actuat...

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Abstract

A surgical instrument in the form of a biopsy needle for removing tissue samples from a patient. The device has means for preloading to excise tissue samples of a preselected one of many possible tissue sample sizes. After preloading, the procedure is easily accomplished using a single hand. The tip is rendered less traumatic by positioning the distal end of the tissue sample notch relatively close to the very distal tip of the stylet. This is accomplished by grinding the distal tip of the stylet into an elliptical shape in a plane having a lateral projection which is away from the distal end of the tissue sample notch.

Description

BACKGROUND OF THE INVENTION[0001]1. Summary of the Invention[0002]The present invention generally relates to medical devices and more particularly relates to surgical instruments.[0003]2. Description of the Prior Art[0004]The diagnostic advantages of obtaining and analyzing a tissue sample have been long known. This procedure is often termed biopsy. To be most useful, the surgical instrument or biopsy needle, utilized to obtain the tissue sample must be insertable through the skin of the patient, guidable through the body to the sample site, and capable of quickly and easily excising and removing the selected sample.[0005]An early biopsy instrument is seen in U.S. Pat. No. 3,577,979, issued to van der Gaast, incorporated herein by reference. Called a disposable surgical skin punch by the inventor, the device is capable of taking manual core samples. U.S. Pat. No. 4,940,061, issued to Terwilliger et al., incorporated herein by reference, shows an extremely complex motorized version o...

Claims

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Application Information

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IPC IPC(8): A61B10/00A61B10/02
CPCA61B10/0275A61B2010/0208
Inventor BAUER, ALBERTO
Owner CAREFUSION 2200 INC
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