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RF Cartridge Bladder with Compliant Multiple Electrode

IP.com Disclosure Number: IPCOM000249331D
Publication Date: 2017-Feb-16
Document File: 4 page(s) / 158K

Publishing Venue

The IP.com Prior Art Database

Abstract

Typical advanced bipolar energy devices seal tissue by first applying a specific compression force at a fixed distance (or gap) then applying RF energy to the tissue captured between the device electrodes. A first problem with this approach is that all tissue, regardless of thickness or volume, is treated the same way. Thicker tissue may not be adequately compressed to achieve a strong seal. Thin, delicate tissue may be over-compressed leading to potential damage. In addition, tissue that is thinner than the fixed gap may also not be adequately compressed. A second problem to be solved is how to treat tissues having complex composition, like liver or lung, where each of the internal structures may potentially need a specific treatment to produce a reliable seal. Both problems can be solved with the incorporation of variable tissue compression within the fixed jaws of a device. The idea disclosed herein describes how a compliant element is incorporated into the jaws of an RF device to provide variable compression to the tissue captured between them.

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RF Cartridge Bladder with Compliant Multiple Electrode

Summary: Typical advanced bipolar energy devices seal tissue by first applying a specific

compression force at a fixed distance (or gap) then applying RF energy to the tissue

captured between the device electrodes. A first problem with this approach is that all

tissue, regardless of thickness or volume, is treated the same way. Thicker tissue may

not be adequately compressed to achieve a strong seal. Thin, delicate tissue may be

over-compressed leading to potential damage. In addition, tissue that is thinner than

the fixed gap may also not be adequately compressed. A second problem to be solved

is how to treat tissues having complex composition, like liver or lung, where each of the

internal structures may potentially need a specific treatment to produce a reliable seal.

Both problems can be solved with the incorporation of variable tissue compression

within the fixed jaws of a device. The idea disclosed herein describes how a compliant

element is incorporated into the jaws of an RF device to provide variable compression

to the tissue captured between them.

Description: Typical RF energy devices have a set of movable jaws onto which are mounted fixed

opposing electrodes. Closing the jaws compresses the tissue to a specific force or a

fixed gap. RF energy is then passed through the compressed tissue along all points of

contact with the electrodes. The idea presented here is to incorporate two compliant

electrodes into the lower jaw of the RF device. More specifically, the idea described

below pertains to an RF cartridge with compliant electrodes that can be installed in a

commercially available endoscopic stapling device converting it to a RF energy device.

This concept could be adapted to common RF energy device jaw construction by those

skilled in the art.

The RF cartridge contains two bladders separated from one another by a channel used

for deploying a knife to transect tissue. Electrodes are mounted on the tissue contact

surfaces of each bladder. The electrodes are flexible in nature and may be constructed

using single or multiple elements. An opposing fixed electrode is mounted on the upper

jaw or in this case the endoscopic stapler anvil. The bladders are inflated using a fluid

(ex. sterile saline) de...