Spray Performances and Cryogenic Characteristics of C02 Snow under Cryosurgery Guided by Endoscopic. (22nd May 2014)

• Record Type: Journal Article
• Authors: Lin, T.-C.; Shen, Y.-J.; Wang, M.-R.
• Is Part Of: Journal of mechanics. Volume 30:Number 3(2014)
• Page Start: 247
• Page End: 253
• Publication Date: 2014-05-22
• Subjects: Mechanics, Analytic -- Periodicals; Mechanics -- Periodicals; 620.1005
• DOI: 10.1017/jmech.2014.26
• Languages: English
• ISSNs: 1727-7191

Abstract

<abstract abstract-type="normal"> <title>ABSTRACT</title> <p>This research experimentally investigated effects of injection pressure, formation chamber and bypass flow on spray performances and cryogenic characteristics of CO₂ snow under cryosurgery guided by endoscopic. Results show that CO₂ snow has a superior freezing capability in the application of cryosurgery. The length of formation chamber is an effective design parameter to control spray performances and cryogenic characteristics. Increase in the length of formation chamber can increase snow size and conversion ratio, as well as the cooling rate and impact area of the tissue. Thus, it is suitable for the application on wider range nidus. Moreover, the bypass flow can efficiently modulate the cooling effect of the main flow with CO₂ snow particles, and extend the operation time of cryosurgery. The experimental results also show that decrease the cylinder pressure, decrease the length of formation chamber, and increase the diameter of bypass apertures can slow down the flying velocity of CO₂ snow which are effective methods to control the jet velocity and prevent the risk of penetration.</p> </abstract>