Cryogen spray cooling (CSC) is used to minimize the risk of epidermal damage during various laser dermatologic surgeries. However, as the application of single or multiple cryogen spurts becomes available on some commercial lasers devices, it is necessary to determine the optimal CSC parameters for different laser surgeries. The objective of this study was to measure the time the sprayed surface of a human skin phantom (HSP) remains below water freezing temperature 0°C, referred to as subzero time (ts), and below the cryogen boiling temperature −26°C, referred to as residence time (tr), as well as the minimum surface temperature (Tmin) and the time at which Tmin occurs (tTmin) for two HSP-initial temperatures (20 °C and 70 °C) during and after the application of single (SCS) and multiple cryogen spurts (MCS). For this propose, a HSP was used to measure ts, tr, Tmin, and tTmin for nine sequences: one SCS of ΔtT = TCT = 40 ms; four MCS sequences, all adding to a ΔtT of 40 ms but with different TCT up to 110 ms and, finally; four SCS that matched the TCT of the four MCS sequences, but lead to different ΔtT. Our results show that the differences between SCS and MCS sequences with the same TCT are negligible for all variables measured (ts, tr, Tmin, tTmin). Moreover, in this interval (40 ms ≤ TCT ≤ 110 ms), this variables show a remarkable linear dependence with the TCT.
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ASME 2004 International Mechanical Engineering Congress and Exposition
November 13–19, 2004
Anaheim, California, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-4711-X
PROCEEDINGS PAPER
Evaluation of Sub-Zero and Residence Times After Continuous Versus Multiple Intermittent Cryogen Spray Cooling Exposure on Human Skin Phantom
Julio C. Ramirez-San-Juan,
Julio C. Ramirez-San-Juan
University of California at Irvine
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Alia T. Tuqan,
Alia T. Tuqan
University of California at Irvine
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Kristen M. Kelly,
Kristen M. Kelly
University of California at Irvine
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J. Stuart Nelson,
J. Stuart Nelson
University of California at Irvine
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Guillermo Aguilar
Guillermo Aguilar
University of California at Riverside
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Julio C. Ramirez-San-Juan
University of California at Irvine
Alia T. Tuqan
University of California at Irvine
Kristen M. Kelly
University of California at Irvine
J. Stuart Nelson
University of California at Irvine
Guillermo Aguilar
University of California at Riverside
Paper No:
IMECE2004-59635, pp. 683-686; 4 pages
Published Online:
March 24, 2008
Citation
Ramirez-San-Juan, JC, Tuqan, AT, Kelly, KM, Nelson, JS, & Aguilar, G. "Evaluation of Sub-Zero and Residence Times After Continuous Versus Multiple Intermittent Cryogen Spray Cooling Exposure on Human Skin Phantom." Proceedings of the ASME 2004 International Mechanical Engineering Congress and Exposition. Heat Transfer, Volume 1. Anaheim, California, USA. November 13–19, 2004. pp. 683-686. ASME. https://doi.org/10.1115/IMECE2004-59635
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