How much PEEP do anesthesia bellows deliver by themselves?

Anesthesia bellows, which are a part of the anesthesia delivery system, typically provide a level of Positive End Expiratory Pressure (PEEP) around 2-3 cm H2O. This amount of pressure helps keep the alveoli open at the end of expiration, promoting gas exchange and improving oxygenation during the administration of anesthesia. The bellows function in this capacity to ensure that there is a minimal amount of baseline pressure in the lungs, which is particularly important during the mechanical ventilation that often accompanies anesthesia.

In practice, while this PEEP is beneficial, it is generally lower compared to other mechanical ventilation devices that may allow for higher settings depending on patient needs. Understanding the function of anesthesia bellows in providing this baseline PEEP helps ensure optimal respiratory parameters are maintained during surgical procedures.