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Related Concept Videos

Pulse rhythm01:30

Pulse rhythm

Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...

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User-Centered Redesign of Monitoring Alarms: A Pre-Post Study on Perception, Functionality, and Recognizability

Cynthia Hunn1, Christoph B Nöthiger1, Julia Braun2

  • 1Institute of Anesthesiology and Perioperative Medicine, University Hospital Zurich, 8091 Zurich, Switzerland.

Healthcare (Basel, Switzerland)
|December 11, 2025
PubMed
Summary
This summary is machine-generated.

Philips redesigned patient monitoring alarm sounds to reduce harshness, improving auditory comfort for anesthesia professionals. While preferred, recognition accuracy varied, with high-priority alarms identified more reliably, suggesting further development is needed for optimal safety and user experience.

Keywords:
alarm systemsanesthesiaauditory perceptionequipment designergonomicsmonitoringpatient safetyphysiologicsound

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Area of Science:

  • Clinical Engineering
  • Human Factors Engineering
  • Medical Device Acoustics

Background:

  • Traditional patient monitoring auditory alarms exhibit harsh acoustic properties, leading to stress and alarm fatigue among healthcare staff.
  • Philips collaborated with Sen Sound to refine alarm sounds, aiming to decrease auditory harshness while maintaining the salience of critical alerts.

Purpose of the Study:

  • To evaluate anesthesia professionals' perception of redesigned Philips alarm sounds compared to traditional sounds.
  • Assessed whether refined alarm sounds are perceived as more pleasant, clinically appropriate, and reliably recognizable.

Main Methods:

  • A single-center, pre-post intervention study was conducted at University Hospital Zurich.
  • Anesthesia providers evaluated traditional and refined Philips alarm sounds on perceived sound appeal, functionality, and recognition accuracy.
  • Mixed-effects regression models were used to test for superiority in perceived sound appeal.

Main Results:

  • Refined alarm sounds significantly improved perceived sound appeal (p < 0.001) but showed a small decrease in perceived functionality (p = 0.002).
  • Recognition accuracy for high-priority alarms improved with refined sounds (89.0% vs. 81.4%, p = 0.002).
  • Traditional sounds had higher recognition accuracy for low- and medium-priority alarms (p = 0.002 and p < 0.001, respectively); 71% preferred refined sounds.

Conclusions:

  • Refined alarm sounds enhance auditory comfort but present a trade-off between sound appeal and clarity, particularly for lower-priority signals.
  • While high-priority alarms were more reliably identified, further development, possibly including auditory icons or voice alerts, is necessary.
  • Optimizing both user experience and patient safety requires continued innovation in clinical alarm sound design.