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Development of easy-to-notice nurse call with low stress: a pilot study using heart rate variability
Mako Katagiri1, Masao Ohira2, Yoshiaki Sakurai3
1Research Division of Product Reliability, Osaka Research Institute of Industrial Science and Technology, Osaka, Japan.
Objectives:
This study evaluated sounds used in nurse call (NC) systems to reduce stress in the nursing work environment by developing low-stress NCs.
Methods:
Participants' noticeability and stress were evaluated based on their heart rate variability while listening to nine types of test sounds, including two existing NCs. Next, a new NC was extracted from the test sounds and was verified in the field as a replacement for the tremolo sound (tremolo), which has a negative impression.
Results:
Tremolo was the most noticeable. However, this sound generates the highest cardiac sympathetic index (CSI), which is an index of stress-related sympathetic nerve activity. Therefore, we extracted a C sound (C6 + G#6), which is the second most noticeable sound after tremolo. The new sound was introduced into a NC system, and the CSI of nurses on duty was analyzed. We noticed that the C sound was less stressful than tremolo.
Conclusions:
The findings suggest that an improvement in the NC sound quality may lead to reduced stress among nurses in the work field.
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