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Related Concept Videos

Operational Amplifiers01:17

Operational Amplifiers

The operational amplifier, often referred to as an op-amp, is a multifaceted building block of a circuit. This electronic component functions like a voltage-controlled voltage source and can also be used to create a voltage- or current-controlled current source. The design of an operational amplifier enables it to execute mathematical operations when external components like resistors and capacitors are linked to its terminals. An op-amp has the capacity to sum signals, amplify a signal,...

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Related Experiment Video

Updated: May 12, 2026

Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach
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Improved pointer in auditory alarms enhances response accuracy.

Michelle Shin1, Ian Grant2, Ramez Mikhail3

  • 1Eastern Virginia Medical School, Norfolk, VA, USA.

BJA Open
|March 31, 2025
PubMed
Summary
This summary is machine-generated.

Enhanced auditory alarms with a novel pointer design significantly improved clinicians' accuracy in identifying critical alerts. This advancement in alarm technology can enhance patient safety and reduce missed alarms in clinical settings.

Keywords:
IEC 60601-1-8auditory iconsclinical alarmspatient safetypointers

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Area of Science:

  • Biomedical Engineering
  • Human Factors Engineering
  • Clinical Informatics

Background:

  • Auditory alarms are critical for alerting clinicians to urgent events in healthcare.
  • Multitasking in clinical environments can lead to missed alarms, negatively impacting patient care.
  • Improving auditory alarm design is essential for enhancing patient safety and clinician satisfaction.

Purpose of the Study:

  • To evaluate an improved auditory alarm design featuring a novel 'pointer' sound.
  • To compare the accuracy and response time of the improved alarm against a previous design.
  • To assess the alarm's effectiveness with both clinicians and non-clinicians.

Main Methods:

  • A controlled laboratory study involved 26 clinicians and 19 non-clinicians.
  • Participants responded to auditory alarms from a previous design and an improved design incorporating harmony, intervallic change, roughness, and glissando.
  • Key metrics included response accuracy (correct identification) and response time.

Main Results:

  • The improved alarm pointer significantly increased response accuracy (F(1,44)=9.11, P=0.004, η² =0.17).
  • Mean accuracy for the improved pointer was 0.90 (95% CI [0.84-0.95]) versus 0.80 (95% CI [0.74-0.87]) for the previous design.
  • Ascending alarms for hypertension (0.89 accuracy) and descending alarms for hypotension (0.81 accuracy) showed varied performance, with low acuity alarms having slower response times.

Conclusions:

  • The enhanced auditory alarm pointer design led to statistically significant improvements in accuracy for all participants.
  • The improved design did not compromise response time, indicating a practical advantage.
  • This novel alarm design has the potential to influence international alarm standards and bolster patient safety.