These researchers compared the new generation Harmonic Ace device to the older generation Ultracision Harmonic Scalpel LCS-K5 (Ethicon Inc, Cincinnati, OH). They found the newer-generation Ultracision to have significantly higher tip temperatures, take longer to reach peak temperatures and maintain blade hyperthermia for a longer period of time after activation compared to the older-generation Ultracision.

These features likely explain the potential for more effective tissue dissection claimed for the newer Ace device. However, the longer duration of blade hyperthermia after activation potentially increases the risk of collateral damage to nerves, bowel or blood vessels contiguous to the working area if the surgeon is unaware of these feature changes of the device.

This is just another example of how surgeons must understand the physics and energy properties of every instrument they are using on their patients. Changes in instrumentation, even within the same company manufacturer, may have significant effects on the physical properties of the device.

Bandi G, Wen CC, Wilkinson EA, Hedican SP, Moon TD, Nakada SY

J Endourol. 2008 Feb;22(2):333-6
10.1089/end.2007.0169

PubMed Abstract
PMID: 18294041

UroToday.com Urologic Trauma & Reconstruction Section

Written by Elspeth M. McDougall, MD, a Contributing Editor with UroToday.

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