Bandi Gaurav, Wen Charles C, Wilkinson Eric A, Hedican Sean P, Moon Timothy D, Nakada Stephen Y
Division of Urology, Department of Surgery, University of Wisconsin, Madison, Wisconsin, USA.
J Endourol. 2008 Feb;22(2):333-6. doi: 10.1089/end.2007.0169.
To compare tip temperatures of the vibrating blades of the newer-generation Harmonic Ace device and the older-generation Ultracision Harmonic Scalpel LCS-K5.
Comparison of two different harmonic scalpel blades was performed by applying them to 3-mm strips of raw chicken breast at room temperature and measuring the temperature of the tip of the vibrating blade at 0.5-second intervals using a thermocouple. Following activation, the tip was allowed to passively cool to 30 degrees C each time before reactivation. Each device was tested at power settings of 3 and 5 after activation for 1 to 5 seconds. All measurements were performed 5 times.
Compared to the older-generation Ultracision Harmonic Scalpel LCS-K5, the newer-generation Harmonic Ace was associated with higher tip temperatures at power level 5 at all times of activation (1-5 seconds), and at power level 3 at longer times of activation (3-5 seconds). The Harmonic Ace also takes longer to reach peak temperatures and can maintain blade hyperthermia for a longer period after activation for more than 3 seconds at power levels 3 and 5.
The newer-generation Harmonic Ace may be potentially more effective in tissue dissection, but is associated with greater increases in peak temperatures and longer blade hyperthermia periods compared to the older-generation Ultracision Harmonic Scalpel LCS-K5. The difference is greater after longer periods of activation, and this may have more potential for collateral damage, particularly to nerves and bowel.
比较新一代超声刀Harmonic Ace与旧一代超声刀Ultracision Harmonic Scalpel LCS-K5振动刀头的温度。
将两种不同的超声刀头应用于室温下3毫米厚的生鸡胸肉条，使用热电偶每隔0.5秒测量振动刀头尖端的温度，以此进行比较研究，并在每次激活后，使刀头被动冷却至30摄氏度后再重新激活。每种设备在激活1至5秒后分别在功率设置为3和5的情况下进行测试，所有测量均进行5次。
与旧一代超声刀Ultracision Harmonic Scalpel LCS-K5相比，新一代超声刀Harmonic Ace在功率水平5时所有激活时间（1至5秒）以及功率水平3时较长激活时间（3至5秒）下，刀头温度更高。Harmonic Ace达到峰值温度所需时间更长，并且在功率水平3和5激活超过3秒后，激活后可使刀头保持高温的时间更长。
新一代超声刀Harmonic Ace在组织切割方面可能更有效，但与旧一代超声刀Ultracision Harmonic Scalpel LCS-K5相比，其峰值温度升高幅度更大且刀头高温持续时间更长。激活时间越长差异越大，这可能对周围组织造成更大的潜在损伤，尤其是神经和肠道。
