Are twitches, startles, and body movements pain indicators in extremely low birth weight infants?

Area of Science:

• Neonatal care
• Infant pain assessment
• Developmental pediatrics

Background:

• Preterm infants in Neonatal Intensive Care Units (NICUs) experience numerous medical procedures.
• Identifying reliable pain cues in these vulnerable infants is crucial for appropriate care.
• Current understanding of motor activity as pain indicators in preterm infants requires further investigation.

Purpose of the Study:

• To investigate if specific body movements, including postural, trunk, and limb actions, serve as pain indicators in preterm infants.
• To differentiate between movements associated with distress and those that are not during routine NICU procedures.

Main Methods:

• A convenience sample of 64 extremely low birth weight preterm infants in a Level III NICU was observed.
• Behaviors during procedures like endotracheal suctioning and chest physical therapy were recorded using the Neonatal Individualized Developmental Care and Assessment Program.
• Heart rate and sleep/waking state changes were also monitored as indicators of distress.

Main Results:

• While heart rate and sleep state changes correlated with procedures, arching, squirming, startles, and twitching were not significantly increased during procedures.
• Finger splay and leg extension were significantly associated with ongoing medical procedures.
• Facial brow raising indicated sensitization, correlating with the number of invasive procedures in the prior 24 hours.

Conclusions:

• Certain extensor movements may indicate distress in preterm infants, whereas tremors, startles, and twitches did not appear to be related to discomfort during the study.
• Motor behaviors may manifest differently during prolonged or more invasive events.
• Further research with extended observation periods is recommended to comprehensively evaluate motor activity patterns as potential stress and pain indicators in NICU infants.