Browse Prior Art Database

Control of Suction and Mitigation of Liver Tissue Clogging for a Cavitron Ultrasonic Surgical Aspirator

IP.com Disclosure Number: IPCOM000249117D
Publication Date: 2017-Feb-07
Document File: 2 page(s) / 302K

Publishing Venue

The IP.com Prior Art Database

Abstract

CUSA is an instrument that is used to advance thru the liver transecting thru the upper layers for dissecting the liver. CUSA stands for Cavitron Ultrasonic Surgical Aspirator, where Cavitron was the original manufacturer. At the tip of the device the ultrasonic action fragments the soft parenchyma by mechanical failure and or by ultrasonic cavitation. The fragments are removed by aspiration (suction) through a central lumen of the blade. Irrigation is added to keep the instrument cool and facilitate the flow of the fragments and in essence sweeps away the parenchyma for skeletonizing the liver vessels and ducts.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 71% of the total text.

Disclosed Anonymously 1/16/2017

Control of Suction and Mitigation of Liver Tissue Clogging for a Cavitron Ultrasonic Surgical

Aspirator

Background:

CUSA is an instrument that is used to advance thru the liver transecting thru the upper layers for

dissecting the liver. CUSA stands for Cavitron Ultrasonic Surgical Aspirator, where Cavitron was the

original manufacturer. At the tip of the device the ultrasonic action fragments the soft parenchyma by

mechanical failure and or by ultrasonic cavitation. The fragments are removed by aspiration (suction)

through a central lumen of the blade. Irrigation is added to keep the instrument cool and facilitate the

flow of the fragments and in essence sweeps away the parenchyma for skeletonizing the liver vessels

and ducts.

Problem:

The problem is that the CUSA’s ultrasonic blade has a central lumen for liver parenchyma aspiration that

clogs during the liver fragmentation procedure. The CUSA instrument has a relatively small diameter

which makes it precise for skeletonizing vessels however it exacerbates the clogging problem. This paper

describes different methods to prevent clogging by means of a solid ultrasonic blade which has no

internal suction hole and is surrounded by a suction channel for parenchyma removal. A design

improvement could be in the form of parylene coating the acoustic components to reduce friction with

the tissue being mobilized and thereby prevent tissue clogging. Depending on cost, manufacturing and

fluid flow design...