Application of improved wet sensors in the early warning of internal fistula needles prolapse

Abstract

Objective To explore the warning effect of the improved wet sensor in the oozing and bleeding of internal fistula puncture site,so as to prevent the phenomenon of fistula needle slippage.Methods From January 2012 to June 2012,to select the 60 patients who accepted hemodialysis treatment by arteriovenous fistula needle,then to monitor the blood oozing and bleeding of fistula needle point with the improved wet sensors.Results The saline induction alarm sensitivity between the wet sensors with resistance value of 1.2 MΩ and 2.2 MΩ and the wet sensors with value of 2 000 Ω,significant differences were found (t =19.91,20.13 ; P ＜0.01).While no significant difference was found in saline induction alarm sensitivity between the wet sensors with resistance value of 1.2 MΩand of 2.2 MΩ (t =1.43,P ＞ 0.05).The sensitivity of wet sensors with resistance value of 1.2 MΩ and 2.2 MΩ was higher.when the oozing amount reached (1.21 ± 0.49) ml and (1.12 ± 0.50) ml,they were alerted.While there was no significant difference was found between them (t =0.73,P ＞ 0.05).Conclusions The wet sensor can effectively monitor and early warning the oozing and bleeding during the operation of internal fistula puncture point,and can effectively prevent the phenomenon of fistula needle slippage and avoid the harm of dialysis accident. Key words: Diffusion of innovation; Internal arteriovenous fistula; Wet sensor; Early warning; Puncture needle prolapse