Routine Normal Saline Instillation Before Tracheostomy Suctioning Is Not Recommended

Evidence of Lack of Benefit and Harm

Routine instillation of normal saline into tracheostomy tubes before suctioning does not thin secretions and is linked to decreased oxygen saturation, increased coughing with aerosolization risk, and possible contamination of the lower airway 1, 2.
Controlled studies have failed to show that normal saline effectively thins or mixes mucus in tracheostomy patients 1, 2.
Historical rationales—such as loosening secretions, lubricating catheters, or stimulating cough—are not supported by current evidence 1.
Saline instillation leads to a measurable drop in oxygen saturation during and after suctioning 1, 3.
The procedure increases coughing and aerosol generation, heightening infection‑control concerns 3.
Use of unsterile saline can contaminate the lower airways 1.

The American Thoracic Society explicitly recommends that routine saline instillation is not advised for children with chronic tracheostomy 1, 2.
Recent multidisciplinary guidelines echo this stance, advising avoidance of saline before suctioning because of the heightened risk of coughing and aerosolization and the lack of demonstrable benefit 3.

Adequate humidification (environmental humidity and heated humidification systems) is more effective than saline instillation for keeping secretions thin 1.
Optimizing humidification should replace routine saline use 2.

Perform suctioning with a clean technique for home care, including thorough handwashing before and after each procedure 4.
Employ closed‑circuit suctioning systems to reduce aerosolization, especially during infectious disease outbreaks 3.
Select the largest catheter size that comfortably fits within the tracheostomy tube to maximize secretion removal efficiency 1, 2.
Apply a rapid suctioning method—completed in less than 5 seconds—with continuous suction during both insertion and removal 1, 2.
Conduct an initial suction pass to clear visible secretions before delivering any hyperinflation or hyper‑oxygenation breaths 1, 2.

After suctioning, flush the catheter with tap water rather than saline 4.
Reusable catheters should be cleaned with hot soapy water, disinfected, rinsed, and air‑dried 4.

Do not routinely instill saline even when secretions appear thick; instead, optimize humidification and ensure adequate patient hydration 1, 3.
Avoid forcing secretions distally by delivering manual breaths while secretions are bubbling in the tube; suction should be performed first 1, 2.
Jet nebulizers should not be used in tracheostomy patients because they generate excessive aerosol; preferred devices are spacers or vibrating‑mesh nebulizers 5, 3.