Types of medical ventilators
Respiratory support is to save the acute and critically ill patients the most critical one of the means of life, and thus, in the clinical treatment of medical ventilator has become an indispensable instrument; it in the emergency, anesthesia, ICU and respiratory therapeutic areas to Chiang Yu Yu widely used; grasp ventilator basic knowledge and basic method of operation is the clinician required basic knowledge and skills. In this paper, the ventilator in the clinical application of some common sense to do something simple summary:
According to the working characteristics of the ventilator can be divided into the following types:
1, constant pressure ventilators
Breathing, airway ventilator pumped to a certain pressure of the gas, the alveolar expansion, airway pressure gradually rose, reaching a predetermined pressure, the flow terminates into the expiratory phase. Such tidal volume ventilator, ventilator preset pressure, inspiratory time, flow rate and so on. Such as low flow rate, inspiratory time is short, predetermined low pressure, tidal volume is small, and vice versa tidal volume increases. If decreased lung compliance or bronchial spasm increased airway resistance can make the tidal volume decline.
The disadvantage of this type of ventilator airway pressure increases, the tidal volume can not be guaranteed, the advantage of a leak when the airway, it must maintain a certain pressure, but also to maintain adequate ventilation, in short, such a ventilator holding pressure can not be maintained capacity.
2, set the volume ventilators
Fixed volume ventilator gas pumped into the airway and lung disease, resulting in inspiratory breath action. The advantage of this type of ventilator pressure range is in a safe, closed airway state can guarantee a certain tidal volume. Disadvantage is that the airway can not compensate for leakage, excessive airway pressure can occur equally hypoventilation. In short, this type of insurance capacity ventilator pressure can not be maintained.
3, regular ventilators
For the timing, pressure limiting constant-breathing machine, ICU ventilator generates airflow into the airway reaches a predetermined time, suction stop, resulting in breath. In the expiratory phase, there are still low-pressure air through the airway. Its inspiratory time, respiratory rate, suction / call ratio, inhalation gas oxygen concentration can be adjusted.
Above classification is based on the inspiratory phase and expiratory phase conversion and classification. Also press the control mode (electric, pneumatic), use classification. Another type of high frequency ventilation ventilator, which is characterized by high respiratory rate, tidal volume, non-confined gas operation.
1, constant pressure ventilators
Breathing, airway ventilator pumped to a certain pressure of the gas, the alveolar expansion, airway pressure gradually rose, reaching a predetermined pressure, the flow terminates into the expiratory phase. Such tidal volume ventilator, ventilator preset pressure, inspiratory time, flow rate and so on. Such as low flow rate, inspiratory time is short, predetermined low pressure, tidal volume is small, and vice versa tidal volume increases. If decreased lung compliance or bronchial spasm increased airway resistance can make the tidal volume decline.
The disadvantage of this type of ventilator airway pressure increases, the tidal volume can not be guaranteed, the advantage of a leak when the airway, it must maintain a certain pressure, but also to maintain adequate ventilation, in short, such a ventilator holding pressure can not be maintained capacity.
2, set the volume ventilators
Fixed volume ventilator gas pumped into the airway and lung disease, resulting in inspiratory breath action. The advantage of this type of ventilator pressure range is in a safe, closed airway state can guarantee a certain tidal volume. Disadvantage is that the airway can not compensate for leakage, excessive airway pressure can occur equally hypoventilation. In short, this type of insurance capacity ventilator pressure can not be maintained.
3, regular ventilators
For the timing, pressure limiting constant-breathing machine, ICU ventilator generates airflow into the airway reaches a predetermined time, suction stop, resulting in breath. In the expiratory phase, there are still low-pressure air through the airway. Its inspiratory time, respiratory rate, suction / call ratio, inhalation gas oxygen concentration can be adjusted.
Above classification is based on the inspiratory phase and expiratory phase conversion and classification. Also press the control mode (electric, pneumatic), use classification. Another type of high frequency ventilation ventilator, which is characterized by high respiratory rate, tidal volume, non-confined gas operation.
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