Neonatal Chest Compression Device

Neonatal Chest Compression DeviceCourtney GallagherJillian ZeberAdvisor: 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 11-12 lbs of force directly below the nipples in the center of the chest. • Verified with bathroom scale and free weights.

• Maintain a rate of 80-100 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• http://www.zoll.com/medical-products/cardiac-support-pump

/autopulse/

• http://content.onlinejacc.org/cgi/content/full/44/11/2214/FIG2