What is ventilation with positive pressure?

Positive pressure ventilation (PPV) is a form of artificial respiration in which the mechanical fan is used to forced air into the non -called patient. In contrast to the ventilation with a negative pressure in which the body is closed in iron lungs, which forces the chest to expand and suck air, PPV forces air directly into the lungs. This is achieved by connecting the artificial endotracheal or tracheostomy air tract tube of the patient. The most common types of PPV machines are volume -cycled fans, pressure fans, flow fans and time -cycled fans. A certain preset air flow is pumped into the lungs, after which passive exhalation is allowed. It is most commonly used in critical situations where the patient requires a pre -calculated amount of air and is one of the most commonly used forms of this treatment.

PVP-cycled PVP provides oxygen during inhalation until a certain preset pressure level, after which passive exhalation is allowed. Generally less powerfulOut than the type cycled, pressure -cycling positive pressure is more commonly used as a short -term solution to ensure breath supported by pressure. Sometimes it is also used for critical situations, but it is rare. It is used more often in healthcare facilities and mobile units of intensive care.

Ventilation with positive flow pressure provides increasing oxygen intake. At least it is until the resistance is sufficiently reduced to allow preset flow. When it has been achieved, the oxygen rate is gradually stored until it matches the required flow.

Time cycled ventilation of positive pressure relies on the timer to provide artificial respiration until the preset timby is reached. Then the patient may allow to exhale passively. The amount of time is based on the required volume. If the current flow of oxygen is higher than required, less time must be used. PHowever, the flow is prevented, the time must be prolonged until the correct volume is delivered to the patient's lung.

6 Unlike negative ventilation, the ventilation of positive pressure is much less invasive and is therefore more preferred. Since the 90s of the 20th century it has become an integral tool in the treatment of respiratory failure.