A nurse assisted in endotracheal intubation. The doctor advised to maintain cuff pressure between 20-25 mm Hg. What is the complication of low cuff pressure?

1. A

   Risk for aspiration pneumonia

2. B

   Ischemia

3. C

   Tracheal bleeding

4. D

   Pressure necrosis

Appeared in: DSSSB - 28 August 2019 (Shift-1)

Explanation

• The primary function of an endotracheal tube (ETT) cuff is to seal the airway, preventing air leakage during ventilation and protecting the lower airway from aspiration of secretions.
• Low cuff pressure (less than 20 mm Hg) results in an inadequate seal against the tracheal wall.
• This poor seal allows oropharyngeal secretions pooled above the cuff to leak down into the lungs.
• This leakage, known as aspiration, significantly increases the risk of developing aspiration pneumonia, a common type of ventilator-associated pneumonia (VAP).

Why Other Options Were Wrong

• Option B: Ischemia, or reduced blood flow to tissues, is a complication of HIGH cuff pressure, not low pressure.
• Option C: Tracheal bleeding is a complication associated with HIGH cuff pressure, which can cause erosion and damage to the tracheal mucosa.
• Option D: Pressure necrosis, the death of tissue due to prolonged pressure, is a severe complication of HIGH cuff pressure.

Related Visual

Clinical Relevance

• Nursing practice connection: Knowing Complications of endotracheal tube cuff pressure management helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
• Nurses play a crucial role in preventing complications by regularly monitoring ETT cuff pressure with a manometer, typically every 8-12 hours and after repositioning.
• Maintaining cuff pressure within the therapeutic range (20-25 mm Hg or 25-30 cm H₂O) is a critical nursing intervention to prevent both aspiration pneumonia (from low pressure) and tracheal injury (from high pressure).
• What if? If a patient suddenly requires higher ventilator pressures to achieve adequate tidal volumes and the cuff pressure is found to be low despite adding air, the nurse should suspect a cuff leak. This requires immediate notification of the respiratory therapist and physician, as the ETT may need to be replaced to prevent aspiration and ensure adequate ventilation.

How to Approach the Question

• First, identify the key phrase in the question: "complication of low cuff pressure."
• Recall the primary purpose of an endotracheal tube cuff, which is to create a seal within the trachea.
• Think logically about what would happen if the seal is insufficient due to low pressure. An incomplete seal would allow substances from above to leak past it.
• Evaluate the options based on this logic. 'Risk for aspiration pneumonia' directly relates to leakage of secretions into the lungs.
• Consider the other options: 'Ischemia,' 'tracheal bleeding,' and 'pressure necrosis' are all forms of tissue damage caused by excessive force or pressure, which corresponds to HIGH cuff pressure, not low.
• Therefore, eliminate the options related to high pressure, leaving 'Risk for aspiration pneumonia' as the correct answer.

Concept Tested & Keywords

• Concept Tested: Complications of endotracheal tube cuff pressure management.
• Stem keywords: endotracheal intubation, cuff pressure, complication, low cuff pressure
• Lead-in keywords: What is
• Clinical cues: maintain cuff pressure between 20-25 mm Hg

Question ID

QTTjokfUahsuGNXctUwma9

Copy ID

Reference Book

E6 Nursing Fundamentals Potter Perry 12e Part 5 p. 30-32

E6 Nursing Fundamentals Taylor p. 734-736