Assessment of pain in critically ill children. Is cutaneous conductance a reliable tool?

Area of Science:

• Pediatric Critical Care Medicine
• Pain and Sedation Monitoring
• Biomedical Engineering

Background:

• Accurate assessment of pain and sedation in critically ill children is challenging.
• Hemodynamic variables, clinical scales, and bispectral index (BIS) are commonly used.
• Skin conductance (SC) offers a potential non-invasive monitoring method.

Purpose of the Study:

• To evaluate the utility and accuracy of SC for assessing sedation and pain in pediatric critical patients during invasive procedures.
• To compare SC's effectiveness against hemodynamic variables, clinical scales (Ramsay, COMFORT, numeric rating pain scales), and BIS.
• To determine SC's performance in both non-muscle-relaxed and muscle-relaxed pediatric patients.

Main Methods:

• Prospective observational study involving 61 critically ill children undergoing invasive procedures.
• Collected hemodynamic data (heart rate, arterial blood pressure), clinical scale scores, BIS, and SC fluctuations per second.
• Data gathered before, during, and after the procedures.

Main Results:

• In non-muscle-relaxed patients, heart rate, pain scales, and Ramsay scale scores increased significantly.
• SC fluctuations per second increased during procedures but did not indicate pain or stress levels nor precede other measures.
• No significant changes were observed in any variable for muscle-relaxed patients.

Conclusions:

• Skin conductance was not more sensitive or faster than clinical scales for pain/stress assessment in critical pediatric patients.
• SC monitoring proved ineffective in muscle-relaxed pediatric patients.
• Current clinical scales and BIS remain more reliable for pain and sedation assessment in this population.