| 摘要 |
The medical pressure gauge and indicator device is for diagnosing the presence of tension pneumothorax in the pleural cavity of a patient. The gauge and indicator device comprises a diaphragm, a needle and a sleeve, with the diaphragm having an interior surface for contact with the pressurized air within the pleural cavity and having an exterior surface for contact with atmospheric air. The needle is of sufficient length for puncturing the chest wall and for extending into the pleural cavity. The sleeve is in the form of an elongated rigid tubular body, is provided with a pair of ends and mounts the needle and diaphragm at opposite ends thereof. The diaphragm has an expanded position and a collapsed position. When in the collapsed position, the diaphragm is generally located within the interior of the sleeve. The needle has a rear end inflow communication with the interior of the sleeve and the interior surface of the diaphragm and a sharpened chest wall-puncturing forward end. With such a construction, the needle is adapted to transmit the pressure of air within the pleural cavity to the interior of the sleeve where it acts upon the interior surface of the diaphragm, whereby, if a pressure greater than atmospheric pressure is present, the diaphragm will be urged out of the sleeve and form or assume a balloon-like shape or configuration which positively indicates the presence of greater than atmospheric air pressure within the pleural cavity, thus indicating to the medical person the treatment required for the patient. If the diaphragm does not expand, atmospheric or less than atmospheric pressure exits within the pleural cavity, thus indicating to the medical person another form of treatment required for the patient. |
