PROJECT
Design Solution
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​3-D printed volume control frame
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3 settings to fit standards: 285, 400, and 500 mL for neonatal, pediatric, and adult configurations
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Lock-spring mechanism at three pillars around pump with keys attached to tension springs
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Pressure relief valve
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Air release at 17.6 cm H2O to prevent over inflation
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Cylindrical pump
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Easy geometry for pumping with arms, legs, hands, or feet
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Extension tubing
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Removal of people around patient, flexible use of device
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3-D printed adapter between tubing and pump
Methods
Volume
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Height at set volumes of water in a cylindrical container were measured to determine the calibration factor.
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Cylindrical container was half submerged in large bath of water with extension tube with in air pocket.
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Volume was measured for each pump of air (n=10) at the four different configurations (neonatal, pediatric, adult, and AMBU bag) for three individuals.
Pressure
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Device was attached to pressure measurement device.
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For each configuration, two sets of data of the pressure generation over time was collected corresponding to two individuals pumping 10 times for 2 seconds each.
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Maximum pressure was determined by examining the plot.
Statistics
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Levene’s test
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Effect of adult vs. AMBU configurations on variation in volume and pressure
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1-way ANOVA, post hoc Tukey
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Effect of individual on volume and pressure for each configuration
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Welch’s ANOVA, post hoc Tukey
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Effect of configuration on pressure
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