A 3D-Printable Instrument to Improve Force Vector Measurement in CPR Training

In this article, we extend our previous instrument [1], which helps trainees improve the precision of their compressions during Cardio-Pulmonary Resuscitation (CPR), by adding to it a 3D-printed component (http://acima.lncc. br/i&m) that further improves the precision of force angle measurements. Our instrument measures the force vector and frequency of CPR compressions performed by the trainee. CPR is a technique that allows a certified person to try to keep alive someone whose heartbeat and/or breathing has stopped. Through compressions applied to the thorax of the individual in need of help, one can maintain the blood flow and air intake until further help (and equipment) arrives. During CPR training, our 3D-prototype methodically attaches a standard CPR manikin to a Nintendo WiiTM Balance Board, enabling adequate balance of the instrument, and thus, obtaining more precise data out of the compressions performed. Results of our empirical evaluations show that with the 3D prototype, the measured parameters of force value, force direction and frequency have a standard uncertainty of 0.91 KgF, 0.25 Rad (14.35 degrees), and 0.15 Hz, respectively, while without our 3D prototype they have a standard uncertainty of 0.72 KgF, 0.44 Rad (25.25 degrees) and 0.12 Hz, respectively. Results prove that our 3D prototype contributes to increasing the precision of force angle measurement, since it holds the manikin firmly in place, while having negligible effect in force amount and frequency measurements. © 1998-2012 IEEE.