1. แบบ negative pressure ventilator

1. a negative pressure ventilator (NPV) by keeping air pressure in chest respirator that negative ropthonwong reduced. As a result, chest expanded. The pressure in the respiratory system and airbags is reduced below atmospheric. Make the air flow into the lungs without needing to use the respiratory tubes. 2. Positive pressure ventilator (PPV) is the pressure of air entering the lungs directly to cause a positive pressure in the vagina or the air entrapped at the beginning of your tract transmission power of breath and drive mechanism until the required level, then, it will push the air flow into the lungs and air sacs (output control valve) positive pressure occurs during the breath.

1. A negative pressure ventilator (NPV) by making the air pressure in the ventilator surrounding breast reduction is negative. As a result, the pressure in the chest expands the airways and alveoli lower atmosphere. Airflow into the lungs without the need for endotracheal
2. Positive pressure ventilator (PPV) is a compressed air pressure directly into the lungs. By making a positive pressure in the cavity. Or the entrapped air in the early part of the respiratory system, power transmission and drive mechanism to the desired level. Then, it will push air into the lungs and air sacs (output control valve) was positive pressure during inhalation.

1.A negative pressure ventilator (NPV) by making the air pressure in the enclosed lower chest respirator was negative. Xinhua chest. Expansion pressure in the respiratory system and air sacs are lower than the atmosphere.2.Positive pressure ventilator (PPV) is compressed to push air into the lungs directly. By creating a positive pressure in the channel. Or a box to store the air part of the machine of respiratory system and power transmission drive mechanism until the desired level.(output control valve) positive pressure during the breath.