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The effect of the sound of the womb on reducing stress in premature infants

Design and Clinical Evaluation of a Womb Sound Simulator Device for Reducing Stress in Preterm Infants in the Neonatal Intensive Care Unit (NICU)

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
IRCT
Registry ID
IRCT20250509065657N1
Enrollment
30
Registered
2026-05-13
Start date
2026-01-30
Completion date
Unknown
Last updated
2026-06-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pain / painful procedure. Preterm [premature] newborn [other]

Interventions

Intervention 1: In this study, the intervention consists of delivering Simulated Intrauterine Sounds to preterm infants admitted to the NICU. These sounds are provided using a calibrated and standardi

Sponsors

Shahid Beheshti University of Medical Sciences
Lead Sponsor

Eligibility

Sex/Gender
All
Age
7 Months to 9 Months

Inclusion criteria

Inclusion criteria: Late preterm infants, with a gestational age of 34 full weeks to 36 weeks and 6 days Having a stable clinical condition as determined by a neonatologist Absence of any known life-threatening diseases, major congenital anomalies, or diagnosed hearing impairments No need for invasive mechanical ventilation

Exclusion criteria

Exclusion criteria: Sudden and acute change in the clinical condition of the infant requiring emergency intervention Initiation of sedative medications that affect the level of consciousness Parental withdrawal at any stage of the study

Design outcomes

Primary

MeasureTime frame
Measured by the total score of the Premature Infant Pain Profile Revised, following exposure to the womb sound simulator intervention. This outcome reflects behavioral and physiological responses to auditory stimulation and is considered the main indicator of the effectiveness of the intervention. The sample size of the study is calculated based on the expected change in this outcome variable. Timepoint: The primary outcome will be measured at the following time points: at baseline before the intervention, during the intervention at the thirtieth minute of sound exposure, and thirty minutes after completion of the intervention session. Measurements will be performed on each intervention day during the three consecutive days of intervention. Method of measurement: The primary outcome will be measured using the Premature Infant Pain Profile Revised, a standardized and validated clinical assessment tool. This scale evaluates pain and stress in preterm infants based on changes in heart rate, oxygen saturation, facial expressions, and gestational age, and is completed by a trained nurse or researcher through direct observation and monitoring data.

Secondary

MeasureTime frame
The secondary outcome variable is the change in physiological stability of preterm infants, defined as the mean heart rate measured during and after the intervention period, following exposure to the womb sound simulator intervention. This outcome reflects the autonomic nervous system response to auditory stimulation and is considered a supportive indicator of the calming effect of the intervention. Timepoint: At baseline before the intervention, during the intervention at the thirtieth minute of sound exposure, and thirty minutes after completion of the intervention session. Measurements will be recorded continuously using bedside monitoring and averaged for each defined time point during the three consecutive days of intervention. Method of measurement: Will be measured using continuous heart rate monitoring through a standard neonatal bedside monitoring system. Heart rate values will be extracted from the monitor records and analyzed by the research team according to predefined time intervals.

Countries

Iran (Islamic Republic of)

Contacts

Public ContactMohammad Shokraei

Shahid Beheshti University of Medical Sciences

info@sbmu.ac.ir+98 21 23871

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Jun 11, 2026