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What Is Pressure Support Ventilation?

Mary McMahon
Mary McMahon
Mary McMahon
Mary McMahon

Pressure support ventilation (PSV) is a form of mechanical ventilation for patients that works with them when they try to breathe, instead of totally controlling the airway. It can be used with patients capable of breathing independently who are not getting quite enough air. This can be especially useful for ventilator weaning, where the eventual goal is to take the patient off the ventilator altogether. Pediatric and adult patients can be provided with pressure support ventilation, and it can also be used in operating rooms with some kinds of anesthesia.

Patients still need to wear ventilation equipment when they use pressure support ventilation. When they start to breathe in, this triggers the ventilator to increase the positive pressure in the airway, which forces air into the patient’s lungs. The patient wouldn’t be able to get enough air independently, and the ventilator ensures that sufficient gas exchange occurs. Fresh oxygen enters the blood through the lungs while the lungs exchange carbon dioxide for release. As the patient exhales, the ventilator pressure drops to allow for complete exhalation.

Patients still need to wear ventilation equipment when they use pressure support ventilation.
Patients still need to wear ventilation equipment when they use pressure support ventilation.

This patient-triggered approach provides respiratory support, rather than total respiratory control. A technician can set the machine to the specifications suitable for the patient, considering the desired amount of airflow. As the patient’s lungs improve, the level of assistance provided by the ventilator can drop, until the patient can breathe entirely independently. Such patients may need to remain on oxygen in some cases, but do not need assistance with maintaining ventilation pressure.

Pressure support ventilation (PSV) is a form of mechanical ventilation for patients that works with them when they try to breathe, instead of totally controlling the airway.
Pressure support ventilation (PSV) is a form of mechanical ventilation for patients that works with them when they try to breathe, instead of totally controlling the airway.

One benefit to this technique is that less sedation is required. Patients in intensive care sometimes need to be heavily sedated for their comfort, which is not necessarily beneficial for their long term health, and can be unsettling for family members. Pressure support ventilation creates less discomfort and distress, and can allow care providers to back down on sedation, which may promote faster healing. Patients also don’t need to stay on the ventilator as long, which reduces the risk of pneumonia and other complications.

A patient needs more assistance than a pressure support ventilator can give during surgery, but may be able to use the machine after waking.
A patient needs more assistance than a pressure support ventilator can give during surgery, but may be able to use the machine after waking.

Care providers may recommend pressure support ventilation to allow a patient to breathe as independently as possible while reducing the workload and strain on the lungs. The settings need to be carefully customized to the individual patient and can require adjustment over time. Patients who experience discomfort should alert care providers. Since a ventilator can inhibit verbal communication, they may need to touch care providers and point at the ventilator, or use paper and pen to communicate about the issue.

Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a TheHealthBoard researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Learn more...
Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a TheHealthBoard researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Learn more...

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    • Patients still need to wear ventilation equipment when they use pressure support ventilation.
      By: Kadmy
      Patients still need to wear ventilation equipment when they use pressure support ventilation.
    • Pressure support ventilation (PSV) is a form of mechanical ventilation for patients that works with them when they try to breathe, instead of totally controlling the airway.
      By: sudok1
      Pressure support ventilation (PSV) is a form of mechanical ventilation for patients that works with them when they try to breathe, instead of totally controlling the airway.
    • A patient needs more assistance than a pressure support ventilator can give during surgery, but may be able to use the machine after waking.
      By: sudok1
      A patient needs more assistance than a pressure support ventilator can give during surgery, but may be able to use the machine after waking.
    • Pressure support ventilation is used with some types of anesthesia.
      By: uwimages
      Pressure support ventilation is used with some types of anesthesia.
    • Pressure support ventilation works with patients when they try to breathe, instead of totally controlling the airway.
      By: snapgalleria
      Pressure support ventilation works with patients when they try to breathe, instead of totally controlling the airway.