A method for simultaneous physiological and radiographic recordings from sleeping neonatal piglets

Area of Science:

• Neonatal physiology
• Gastroenterology
• Pulmonology

Background:

• Neonatal piglets share physiological similarities with human infants, making them a suitable model for studying infant conditions.
• Gastro-esophageal reflux (GER) is a common issue in infants, potentially affecting airway protection.
• Understanding GER's impact on airway mechanisms during sleep is crucial for infant health.

Purpose of the Study:

• To develop and validate a healthy neonatal piglet model for investigating simulated GER.
• To assess the effects of simulated GER on airway protective mechanisms during different sleep states.
• To correlate physiological and radiographic data during GER events.

Main Methods:

• Developed an unanesthetized, instrumented neonatal piglet model for sleep studies.
• Simultaneously recorded physiological data (sleep, cardiorespiratory, swallowing, GER) and radiographic images.
• Simulated GER by introducing solutions (NaCl, water, HCl) into the pharynx or esophagus.
• Validated the model by comparing piglet responses to known human infant physiology.

Main Results:

• The piglet model successfully simulated GER events.
• Simultaneous physiological and radiographic monitoring provided comprehensive data.
• The model demonstrated accurate reflection of healthy sleeping neonate responses to GER.

Conclusions:

• The developed neonatal piglet model is a valid tool for studying GER and its effects on airway protection.
• This model allows for detailed investigation of physiological responses during simulated GER in sleep states.
• Findings contribute to understanding the impact of GER on airway protection in neonates.