Neonatal Chest Compression Device Courtney Gallagher Jillian Zeber Advisor: Dr. Walsh, Vanderbilt NICU

Problem Statement When performed in conjunction with operations of the neck and lower abdomen, there is limited space for manual chest compressions. Manual chest compressions require both hands to be wrapped around the chest. 2 occurrences at the Vanderbilt NICU this past year.

Project Goal Small, easy to setup device that will perform automatic chest compressions on a 0-30 day old infant for use in the OR during a simultaneous procedure.

Performance Criteria Small but adjustable to fit the size of the baby. Provide enough force for sufficient chest compressions to reduce the width to one third, 2 to 3 cm. Apply the lbs of force directly below the nipples in the center of the chest. Verified with bathroom scale and free weights. Maintain a rate of compressions per minute for blood pumping. Simple and easy to use by Dr. Walsh in the NICU

Solution Proposal Pneumatic air cylinder Air compressor Possible Modifications Inflatable balloon Backboard

Device Components Pneumatic cylinder, air compressor, solenoid valve, and a automatic controller Use 1.1 inch diameter plunger to displace chest 2-3 cm. An adjustable elastic Velcro band To fit different sized infants A rigid backboard To concentrate the force on the sternum and not around the entire torso Wheel-up cart supporting base structure and air compressor

Factors Provide necessary but not excessive force (11-12 lbs = 5 kg) Materials that can be sterilized Comfortable Quick setup Potentially portable Safety Adjustable

Previous Work Researched existing adult compression devices AutoPulse, Lucas, Thumper Established goals and criteria that must be met Discussed with advisors Decided on a prototype design Pneumatic cylinder Purchased materials to build initial prototype Pneumatic cylinder and Air compressor Measured force required to provide chest compressions

Current Work Acquiring needed materials Building initial prototype Testing basic setup on Isabel

Future Work After testing, make modifications and re-test Research solenoid valve and controllers Pre-set timers (automatic) Foot pedal w/ exhaust (manual) Design Safe Make Demo Evaluate effectiveness against traditional method

Evaluation Isabel in the NICU Simulation Lab Responds like an alive baby Provides vitals Can determine if chest compression are adequate

References pump/autopulse/ pump/autopulse/