How much suction should be used for an adult?

The recommended suction pressure for adults typically falls within the range of 120 to 150 mm Hg. This pressure level is effective for clearing secretions safely and efficiently without causing trauma to the airway. Maintaining suction pressure within this range helps minimize the risk of complications, such as mucosal injury or hypoxia, which can occur when suctioning is performed with excessive force.

Using lesser pressure, below 120 mm Hg, may not effectively clear thick secretions, while applying higher pressures, above 150 mm Hg, increases the likelihood of damaging the tissues within the airway or the lungs. Thus, the range of 120 to 150 mm Hg strikes a balance between efficacy and safety, making it the appropriate choice for adult patients requiring suctioning.