A pressure measuring syringe, known as the EasyCuff™, has been designed and manufactured to provide physicians with a tool to accurately measure the pressure inside the distal cuff of endotracheal tube tubes (ETTs). The syringe, identical in size to a standard 10 cc syringe, has four components: a seal, a plunger, a barrel, and a silicone-rubber bellows (the pressure measuring component). A finite-element model of the bellows was created using ADINA™; silicone rubber bellows were then produced and shown to correlate linearly with the model to within ±5% up to a load equivalent to an internal pressure of 200 cm H2O. 20 of these bellows were then assembled into EasyCuff™ syringes and tested to assess their accuracy and repeatability. The experimental setup used a currently-available manometer, which the EasyCuff™ is designed to replace, as a reference tool. The data show that the relationship between measured pressure and bellows deflection is linear, with a correlation factor of R2 = 0.99; additionally, environmental testing showed that the EasyCuff™ is unaffected by temperature cycling between −15 °F and +170 °F.
Design, Manufacture, and Testing of the Easycuff™ Pressure Measuring Syringe
Slocum, A. H., Duffley, S. C., Gamazo, J. M., Watral, A., Spiegel, J. E., and Slocum, A. H. (August 20, 2012). "Design, Manufacture, and Testing of the Easycuff™ Pressure Measuring Syringe." ASME. J. Med. Devices. September 2012; 6(3): 031008. https://doi.org/10.1115/1.4007250
Download citation file: