Nasopharyngeal Temperature Probes: Is South Africaâ??s Current Decontamination
Process Adequate?.

Ryan Davids

Abstract

Nasopharyngeal Temperature Probes: Is South AfricaÃ¢??s Current Decontamination Process Adequate?.

BACKGROUND

The standard practice in many institutions incorporates nasopharyngeal probes for temperature monitoring in patients undergoing general anaesthesia. Current disinfection guidelines for these devices are not clear and they are poorly adhered to. In South Africa, these temperature probes are reused and subjected to an unstandardized decontamination processes. This study sought to investigate the nasopharyngeal temperature probe as a possible cross-contaminant and investigate the efficacy of current cleaning practices.

METHOD

This descriptive double-blind study viewed 48 nasopharyngeal temperature probe cultures across the 4 different cleaning protocols. These probes were randomized to a cleaning protocol. The cleaning protocols included water wash, alcohol based wash, dry wipe and (2.4%glutaraldehyde) Cidex® wash. After randomization, the probes were aseptically cultured and inoculated to blood agar plates. After 48hrs of aerobic culture, specimens were examined, and microorganisms identified. Logistic regression analysis assessed the efficacy of these decontamination processes.

RESULTS

Chi-Square analysis [p-value < 0,0001] established the nasopharyngeal temperature probe as a source of cross-contamination. Diverse pathogens were identified on nasopharyngeal temperature probes after exposure to a predetermined cleaning practice. Logistic regression of these cleaning methods [confidence interval of 95%] illustrates Hibitane® and CIDEX® methods as being more effective, yet only the CIDEX® group demonstrated decontamination success in excess of 90%.

CONCLUSION

The data shows that the nasopharyngeal temperature probe is indeed a source of cross-contamination. It goes on to highlight the issue of pathogenic spread due to inadequate decontamination of these temperature probes.