Assess Performance and Efficacy of Manual Resuscitator Bag Valve Mask (BVM) Devices & Techniques

REQUIRED MATERIALS

• Any model of Michigan Instruments TTL^® or PneuView^® System
• Head Simulation Module-Adult (HSM-A) or Head Simulation Module-Infant (HSM-I)
• Manual Resuscitator (Bag Valve Mask (BVM))

For this application, the TTL Test Lung or PneuView System may be used. Use of the PneuView System will provide the user with digital data and waveforms that are unavailable on the TTL alone. Still, the TTL can provide accurate mechanical indications of volume and pressure seen during ventilation.

This setup and application may be used to assess:

• Actual volume delivery during manual resuscitation
• Effects of varying lung compliance and airway resistance on BVM performance
• Incidence of Gas-trapping or AutoPEEP seen during manual resuscitation
• Actual FiO2 delivery to the lungs during manual resuscitation (requires PneuView with oxygen sensor or independent oxygen analyzer)
• Train medical personnel on effective use of manual resuscitators to deliver adequate volume and oxygen to patients while minimizing the risk of trauma caused by excessive pressure to the airways and lungs (barotrauma)

TTL Head Simulation Module Application Guide

1. Connect the Head Simulation Module to the TTL Test Lung.
2. Set nominal compliance setting(s) on the TTL. We suggest a starting setting of .05 L/cmH2O on the adult lung or .005 L/cmH2O on the infant lung.
3. Place a nominal resistance in the upper and lower airways of the TTL. We suggest a starting resistance of Rp5 in the upper and Rp20 in the lower airways of the adult lung, and similarly an Rp50 and Rp200 on the infant lung.
4. If using the PneuView System, start the PneuView Software and make appropriate selections in the Conditions screen and set the Compliance to actual conditions in the data display screen. If not using PneuView, proceed to step 5.
5. Begin ventilation of the simulated patient using the manual resuscitator.
6. Note the upper and lower airway pressures, and the delivered tidal volume.
7. Note the resulting pressure, volume, and flow values and waveforms.

8. Vary ventilation technique and note changes in these values.
9. Vary lung compliance and/or airway resistance, and again note changes in the values.
10. If measuring the delivered FiO2, note how changes in ventilation rate and technique affect the FiO2 values. Also note how changes in the oxygen flowrate to the manual resuscitator affect the delivered FiO2.

Regarding Applications

Michigan Instruments’ “Application & Use Case” documents are intended to provide some guidance and suggestions for use of the Test Lung Simulators. They do not encompass the range of applications for which the TTL and PneuView Systems are appropriate.

We welcome your suggestions for future Application & Use Case scenarios, and encourage you to share your own experiences and applications with us via email at  mii@michiganinstruments.com or contact us today.