While suctioning of the patient placed ET tube in the mouth, suction catheter should insert?

AIIMS Rishikesh & Jodhpur NO - 2017

Medical Surgical Nursing

Medium

Appeared in: AIIMS Rishikesh & Jodhpur NO - 2017

Explanation

The correct technique is to advance the suction catheter until resistance is met or the patient coughs.
This resistance signifies that the catheter tip has reached the carina, which is the anatomical landmark where the trachea bifurcates into the two main bronchi.
Using the carina as a stopping point prevents the catheter from being inserted too deeply, which could cause significant trauma, bleeding, or bronchospasm.
After reaching the carina, it is standard practice to pull the catheter back 1-2 cm before applying suction to avoid direct injury to this sensitive area.

Option B: Inserting the total length of the catheter is incorrect and dangerous. Catheter lengths are not standardized to patient anatomy, and this action would lead to severe trauma to the trachea and bronchi.
Option C: This measurement method (tip of the nose to the earlobe, then to the xiphoid process) is used to determine the insertion length for a nasogastric (NG) tube, not for endotracheal suctioning.
Option D: Inserting the catheter to a fixed depth of 10 cm is arbitrary and not based on individual patient anatomy. For most adults, this would be too shallow, leading to ineffective secretion removal. For a pediatric patient, it could be too deep.

Clinical Relevance

Nursing practice connection: Use the key finding related to Correct procedure and depth for endotracheal tube suctioning to guide bedside assessment, documentation, and the next nursing action.
Proper suctioning technique is a critical nursing skill to maintain a patent airway in ventilated patients, preventing complications like atelectasis and pneumonia.
Improper technique can lead to serious adverse events, including hypoxemia, cardiac arrhythmias (due to vagal stimulation), tracheal mucosal damage, bleeding, and introduction of pathogens into the lower airway.
What if? If you notice bloody secretions upon suctioning, you should immediately stop, re-evaluate your technique, check the suction pressure (should be 80-150 mmHg for adults), and ensure you are not inserting the catheter too forcefully or applying suction during insertion. Notify the healthcare provider as it indicates mucosal trauma.

How to Approach the Question

First, identify the core procedure in the question: suctioning an endotracheal (ET) tube.
Recall the key safety principles for this invasive procedure. The primary goal is to remove secretions while minimizing harm.
Evaluate each option based on these principles. Ask yourself: 'Is this method based on patient anatomy and safety?'
Eliminate options that are clearly for other procedures. The measurement 'Tip of the nose to ear and ear to chest' is a classic distractor for nasogastric tube insertion.
Dismiss options that use arbitrary or non-patient-specific measures, such as 'Total length of catheter' or a fixed number like '10 cm'.
The remaining option, 'Insert until resistance is felt', aligns with the anatomical landmark (the carina) used to guide safe insertion depth. This makes it the most logical and correct answer.

Concept Tested & Keywords

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E6 Nursing Fundamentals Potter Perry 12e Part 5 pp. 19-21, 15-17