[Manual chest compressor for cardiac massage for patients transported on a litter--Part 2: Return to the air balloon method and the future direction of the study].
The prior idea of sternal compression with an inflatable balloon inserted between the chest wall and the precordial metal plate was not realized due to the compressibility of gases. Based on the thoracic pump theory of cardiac massage, an accordion type balloon with a wider contact area to the chest wall was made after many years' of unsuccessful trials of various energy transmission methods. Since the compression power to the chest with this device does not exert extra weight underneath the patient, it can be used on a patient being transported on a litter. It is a simple, safe and light weight device and can be used on a helicopter as well, because the balloon can be inflated from an adjacent seat in the helicopter. Applying the principle of lever, it demands less muscle work compared with the conventional method of cardiac massage. Therefore, it may be useful even in hospitals. For the push-pull method of cardiac massage, however, an electric device may be promising when a.c. electricity or a light weight battery is available.
Morioka
T
T
Takano Hospital, Kumamoto.
Sugiyama
G
G
Kon
Y
Y
D000388:Air; D011211:Electric Power Supplies; D005069:Evaluation Studies as Topic; D005544:Forecasting; D006336:Heart Massage / Q000295:instrumentation*; D006801:Humans; D014187:Transportation of Patients