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Assembly for sequentially percutaneously applying an electrode and an anesthetic to tissue

a percutaneous application and tissue technology, applied in the field of percutaneous application of an electrode and fluid to tissue, to achieve the effect of facilitating the slip fitting of the electrod

Inactive Publication Date: 2016-10-06
STRYKER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a new assembly that allows for easy interchange of an electrode and a syringe with a cannula. The assembly ensures that each time the electrode is inserted, it extends out of the cannula in the same way it did during previous insertions. The assembly includes a means for releasably holding the electrode to the cannula, and the cannula has a stop that helps in fitting the electrode and a feature that releasably engages the electrode. The cannula can also have two proximal end bores to allow for simultaneous removal of the electrode and syringe.

Problems solved by technology

A problem with many known versions of these assemblies is that it has proven difficult to, when the electrode is reinserted into the cannula, to perform the ablation step, position the distal end of the electrode so it extends the same distance out of the cannula as it did during the stimulating step.

Method used

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  • Assembly for sequentially percutaneously applying an electrode and an anesthetic to tissue
  • Assembly for sequentially percutaneously applying an electrode and an anesthetic to tissue
  • Assembly for sequentially percutaneously applying an electrode and an anesthetic to tissue

Examples

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Embodiment Construction

[0021]FIG. 1 depicts the basic components of an assembly 30 of this invention. These components include a cannula 32. Cannula 32 is inserted percutaneously into the patient to provide a portal that opens into the space adjacent the tissue against which the current is to be applied. An electrode 70, also part of assembly 30, is inserted into the cannula 32. The electrode 70 is the device that sources the current to the tissue. Assembly 30 also includes a syringe 90. Syringe 90 is the source of fluid that is introduced into the tissue. This fluid is typically an anesthetic.

[0022]As seen by reference to FIGS. 1 and 2, cannula 32 includes a hub 34 from which a tube 60 extends distally forward. (“Distal” is to mean away from the practitioner using assembly 30, towards the percutaneous target site to which the assembly is applied. “Proximally” is understood to mean towards the practitioner holding the assembly, away from the site to which the assembly 30 is applied.) Hub 34 is dimensioned...

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PUM

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Abstract

An assembly that consist of a cannula; an electrode and a syringe. The cannula has a hub that defines a set of adjacent bores. A first proximal bore receives the head of the electrode. A second bore receives the head of the syringe. The cannula has a stop that limits the extent to which the electrode can be inserted in the proximal bore. When the syringe is inserted in the cannula hub, the syringe is inserted beyond the stop. The syringe presses against an adjacent surface that defines the second bore to form a seal between the cannula and the syringe.

Description

FIELD OF THE INVENTION[0001]This invention relates generally to an assembly for percutaneously applying an electrode and fluid to tissue. The assembly of this invention includes features that facilitate the rapid and precise positioning of the electrode.BACKGROUND OF THE INVENTION[0002]In some medical procedures it is desirable to both apply an electrical current and a fluid to the same target location within the body of the patient. One such procedure in which these steps are performed is a nerve ablation procedure. In a nerve ablation procedure, the nerve subjected to the procedure is ablated, essentially removed. As a result of the ablation process, the nerve no longer functions as a carrier for neurological signals. A nerve ablation is performed in some situations when the patient's neurological system continually transmits signals to the brain that provide the perception that that a limb or other portion of the patient is in pain. To eliminate the transmission of these signals,...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B18/14
CPCA61B18/1477A61M2202/048A61B2017/00477A61B2018/00577A61M5/3293A61B2018/00434A61B2018/1425
Inventor BOBOLTZ, DAVID ROBERT
Owner STRYKER CORP