Housing: Plastic Display Gem Case (Pressed on diaphragm and aluminum retaining ring)
Diaphragm Seal: Super Glue
Visual Indicator‡: Circular Nail Polish on LDPE (Low Density Polyethylene; Sandwich Bag)
Membrane Seal: Generic Super Glue
Amplification: Aluminum Cone
Testing Details: The cone was situated within a housing structure that had an external diagphram; right-side-up, the device was placed on a table and the base of the aluminum cone was super glued to the interior. Then, the upper edge of both the housing and cone were doused with super glue and placed, upsidedown, on a sandwich bag that was held taught. The device was further secured with superglue to maintain the tension and air-tightness.
Results: Taken by a member of the Stony Brook Volunteer Ambulance Corp (SBVAC), which is in our group, the blood pressure procedure was standardized to the current ideal of the medical community. There was no movement that revealed clear indication of pulse.
Comments: Issues may have included no method of truly testing the seal to ensure air-tightness. Additionally, the use of super glue seemed detrimental to our device, visible by a cloudy appearance.
‡ The housing top was not used in the testing of the visual indicator.