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With intermittent positive pressure ventilation, the lungs are expanded by actively blowing air into them.
The positive pressure may be controlled by:
If the patient's breathing is completely taken over by the machine, sedation is required.
Access to the patient's lungs is either by an endotracheal tube or a tracheostomy. The latter is necessary if long term IPPV is required in order to prevent the development of tracheal stenosis.