Normal saline instillation with endotracheal suctioning: primum non nocere (first do no harm)

Area of Science:

• Critical Care Medicine
• Respiratory Therapy
• Patient Safety

Background:

• Normal saline instillation before endotracheal suctioning is a common practice for managing respiratory secretions in mechanically ventilated patients.
• Current guidelines and clinical practices for this procedure are inconsistent, lacking strong research-based evidence for efficacy.
• The routine use of saline instillation raises questions about its actual benefits versus potential risks.

Purpose of the Study:

• To critically evaluate the physiological and psychological effects of normal saline instillation during endotracheal suctioning.
• To review the existing evidence supporting or refuting the benefits of this procedure for patients on mechanical ventilation.
• To propose a shift in clinical focus from secretion removal to secretion prevention strategies.

Main Methods:

• This is a discussion paper synthesizing current literature and clinical observations.
• It critically analyzes the purported benefits against the documented physiological and psychological impacts.
• It reviews the lack of empirical evidence supporting the efficacy of saline instillation.

Main Results:

• The procedure offers no demonstrable physiological benefits for patients requiring mechanical ventilation.
• Saline instillation may lead to adverse psychological effects, impacting patient wellbeing.
• There is a significant lack of research-based evidence to support the routine use of this intervention.

Conclusions:

• The practice of normal saline instillation prior to endotracheal suctioning is not supported by evidence and may be harmful.
• A paradigm shift is needed to prioritize the prevention of thick and tenacious secretions.
• Future clinical efforts should focus on proactive strategies to minimize secretion burden in mechanically ventilated patients.