Ventilator-Associated Pneumonia

What is ventilator-associated pneumonia?

People on breathing machines, called ventilators, have an increased risk of developing pneumonia. Pneumonia is an infection of one or both of the lungs. It's caused by germs such as bacteria, viruses, and fungi. Ventilator-associated pneumonia (VAP) is caused by germs that enter the lungs when a person is on a breathing machine.

What is a ventilator?

Side view of head and chest showing endotracheal tube in place.

A ventilator is a machine that helps a person breathe. A breathing tube carries oxygen from the ventilator to the patient. Breathing tubes may be placed as follows:

  • They may be placed into the windpipe (trachea) through the mouth or nose. This type of tube is called an endotracheal tube.

  • In some cases, the breathing tube is placed directly into the trachea. During a surgical procedure, a small hole is made in the front of the neck and then into the trachea. This type of tube is called a tracheostomy tube.

While on a ventilator, the person can't speak. This is because the breathing tube passes by the voice box in the throat. A person who has a breathing tube and ventilator is treated in a hospital intensive care unit (ICU).

What are the risk factors for VAP?

There are certain factors that increase the chance of developing VAP. They include:

  • Long periods of being on a ventilator

  • Tube feedings or receiving food through a tube into the stomach or small intestine

  • Secretions from the throat, stomach contents, or food or liquids getting into the lungs. This is called aspiration.

  • Improper handwashing by medical staff in taking care of  people on ventilators.

  • Use of certain medicines during tube placement

  • Taking certain medicines that may increase the growth of germs

  • Age, either very young or very old

What are symptoms of VAP?

The signs and symptoms of VAP include:

  • Fever

  • Pus in lung secretions

  • Changes in breathing

  • Low oxygen levels

How is VAP diagnosed?

It may be hard to diagnose VAP. Signs and symptoms, physical exam, and changes on chest X-rays are used to diagnose it. Blood tests and cultures of blood and lung secretions are used to identify the cause and help determine treatment.

How is VAP treated? 

VAP that is caused by bacteria is treated with antibiotic medicines. If there is no improvement in symptoms, healthcare providers look for other causes and then determine the best treatment. Other care includes:

  • Close monitoring

  • Supportive care, which includes providing supplemental oxygen, removing mucus from the lungs, and giving breathing treatments.

How can VAP be prevented?

To keep people from getting VAP, healthcare providers follow certain procedures:

  • Handwashing. This is the single most important way to prevent the spread of germs. Before and after treating each patient, healthcare workers should wash their hands with soap and water. Or they use an alcohol-based hand cleaner.

  • Raising the head of the bed. The head of the bed is kept at a 30° and 45° angle. This helps prevent bacteria or food from entering the lungs.

  • Cleaning the inside of the patient’s mouth. Healthcare providers brush the patient’s teeth and clean his or her mouth. This is done frequently throughout the day and night. This helps limit the germs that can go down into the lungs.

  • Removing or suctioning mucus and fluids from the mouth and throat. This helps prevent the patient from breathing them in. Mucus and fluids contain germs. If the germs get into the lungs, pneumonia can result. 

  • Limiting the use of breathing machines. Healthcare providers assess the patient daily to determine if he or she needs to remain on the ventilator. The breathing machine is stopped and the tube removed as soon as the machine is no longer needed.

To protect your loved one

Use protective gowns, and gloves if your loved one is infected with an organism. It's important not to spread any infection to other patients. You can help prevent your loved one from getting VAP by doing the following:

  • Before entering the hospital room, wash your hands with soap and water. And, continue to wash your hands or use a hand cleaner during your visit.

  • Be a supporter or advocate.

  • It's OK to ask questions and request care for your loved one. Watch to make sure those things that can help prevent VAP are done.

  • Make sure that all healthcare providers wash their hands. If someone does not, kindly remind him or her to do so.

  • Make sure the head of the bed is always raised, and that mouth-cleaning and suctioning are done regularly.

  • Ask when the breathing tube and ventilator are going to be removed.

If you have questions or concerns about your loved one's condition or care, talk to one of his or her nurses or healthcare providers. Also, most hospitals have patient advocate programs to help people and family members with problems.