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RF Cartridge Compression Management

IP.com Disclosure Number: IPCOM000249471D
Publication Date: 2017-Feb-28
Document File: 3 page(s) / 152K

Publishing Venue

The IP.com Prior Art Database

Abstract

Current Endo-cutters have a surgical efficiency disadvantage in that the cartridge must be exchanged between firings. There are instances where the addition of an advanced energy device to the procedure could improve the efficiency but would increase cost. One solution is to create a RF cartridge that can be installed in a standard Endo-cutter converting it into an advanced energy device. Typical Endo-cutter jaw sizes are 45mm or 60mm in length. Large volumes of tissue that these end effectors afford will be more difficult to compress. Therefore there is a need to limit the tissue volume. A second need is to adapt compression force given the tissue volume. The additional compression can help offset losses such as deflection of the anvil during closure. The invention disclosed in this publication describes limiting the tissue volume by incorporating a tissue stop into the RF cartridge while at the same time adapting compression force.

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RF Cartridge Compression Management

Summary: Current Endo-cutters have a surgical efficiency disadvantage in that the cartridge must

be exchanged between firings. There are instances where the addition of an advanced

energy device to the procedure could improve the efficiency but would increase cost.

One solution is to create a RF cartridge that can be installed in a standard Endo-cutter

converting it into an advanced energy device. Typical Endo-cutter jaw sizes are 45mm

or 60mm in length. Large volumes of tissue that these end effectors afford will be more

difficult to compress. Therefore there is a need to limit the tissue volume. A second

need is to adapt compression force given the tissue volume. The additional

compression can help offset losses such as deflection of the anvil during closure. The

invention disclosed in this publication describes limiting the tissue volume by

incorporating a tissue stop into the RF cartridge while at the same time adapting

compression force.

Description: A tissue shield/stop is integrated into the proximal portion of the RF cartridge having a

hinge pivot and is biased upward by a spring. Also integrated into the RF cartridge is an

expandable fluid reservoir or bladder having two chambers. One chamber is located

below the tissue stop the second chamber is located below the electrode. The

chambers are filled with an incompressible fluid such as saline. The tissue stop has

three surfaces: One surface (top) maintains contact with the anvil, one surface (distal)

that maintains contact with the tissue, and one surface (bottom) that maintains contact

with the first fluid chamber. The electrode is configured to float above the second fluid

chamber and is normally biased against the deck of the cartridge when tissue is

clamped in the device jaws. Refer Figure 1. The concept of the floating electrode is

that it is able to com...