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Proceedings Paper

A simplified, low power system for effective vessel sealing
Author(s): Allison B. Lyle; Jenifer S. Kennedy; Dale F. Schmaltz; Aaron S. Kennedy
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Paper Abstract

The first bipolar vessel sealing system was developed nearly 15 years ago and has since become standard of care in surgery. These systems make use of radio frequency current that is delivered between bipolar graspers to permanently seal arteries, veins and tissue bundles. Conventional vessel sealing generators are based off traditional electrosurgery generator architecture and deliver high power (150-300 Watts) and high current using complex control and sense algorithms to adjust the output for vessel sealing applications. In recent years, a need for small-scale surgical vessel sealers has developed as surgeons strive to further reduce their footprint on patients. There are many technical challenges associated with miniaturization of vessel sealing devices including maintaining electrical isolation while delivering high current in a saline environment. Research into creating a small, 3mm diameter vessel sealer revealed that a highly simplified generator system could be used to achieve excellent results and subsequently a low power vessel sealing system was developed. This system delivers 25 Watts constant power while limiting voltage (≤ Vrms) and current (≤ Amps) until an impedance endpoint is achieved, eliminating the use of complicated control and sensing software. The result is optimized tissue effect, where high seal strength is maintained (> 360mmHg), but seal times (1.7 ± 0.7s versus 4.1 ± 0.7s), thermal spread (<1mm vs ≤2mm) and total energy delivery are reduced, when compared to an existing high power system.

Paper Details

Date Published: 11 March 2015
PDF: 5 pages
Proc. SPIE 9326, Energy-based Treatment of Tissue and Assessment VIII, 93260D (11 March 2015); doi: 10.1117/12.2082693
Show Author Affiliations
Allison B. Lyle, JustRight Surgical, LLC (United States)
Jenifer S. Kennedy, JustRight Surgical, LLC (United States)
Dale F. Schmaltz, JustRight Surgical, LLC (United States)
Aaron S. Kennedy, JustRight Surgical, LLC (United States)

Published in SPIE Proceedings Vol. 9326:
Energy-based Treatment of Tissue and Assessment VIII
Thomas P. Ryan, Editor(s)

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