The rationale for asking a patient to breathe in and hold breath for 3 seconds during incentive spirometry is to

Appeared in: GMCH - 2015

Explanation

The primary goal of incentive spirometry is to encourage voluntary deep breathing to prevent or treat atelectasis (collapse of the alveoli).
Holding the breath at peak inspiration for 3-5 seconds is known as a Sustained Maximal Inspiration (SMI).
This maneuver creates sustained pressure that keeps the alveoli open longer, allowing more time for gas exchange.
The sustained pressure also promotes the opening of collapsed alveoli through collateral air channels (Pores of Kohn), thus helping in their re-expansion.

Option B: Deep breathing exercises improve ventilation, which helps to blow off carbon dioxide (CO2). This leads to lower CO2 levels (hypocarbia), not higher levels (hypercarbia).
Option C: The act of deep breathing and expanding the chest wall often increases pain at a thoracic or abdominal incision site. It does not reduce it.
Option D: While improved lung volumes and the coughing that may follow incentive spirometry can help mobilize secretions, this is a secondary benefit. The specific instruction to hold the breath is directly aimed at alveolar re-expansion.

Clinical Relevance

Nursing practice connection: Use the key finding related to Incentive Spirometry and Postoperative Respiratory Care to guide bedside assessment, documentation, and the next nursing action.
Proper patient education on incentive spirometry is a key nursing responsibility to prevent postoperative pulmonary complications (PPCs) like atelectasis and pneumonia.
Nurses must assess the patient's ability to perform the exercise correctly, including the breath-hold, and provide feedback and encouragement.
What if the patient feels dizzy or lightheaded while using the spirometer? The nurse should instruct the patient to stop, remove the mouthpiece, take a few normal breaths, and then resume. This is often caused by breathing too quickly (hyperventilation).

How to Approach the Question

First, identify the core subject of the question, which is 'incentive spirometry'.
Next, pinpoint the specific action being asked about: 'hold breath for 3 seconds'.
Analyze the options in the context of the physiological purpose of this specific action.
Recall the primary goal of incentive spirometry, which is to combat atelectasis by promoting deep lung inflation.
Evaluate how holding the breath contributes to this goal. The sustained pressure helps keep alveoli open.
Eliminate the other options by considering their physiological effects. Deep breathing reduces CO2 (eliminating B), can increase incisional pain (eliminating C), and the breath-hold's primary role isn't secretion mobilization (eliminating D).

Concept Tested & Keywords

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E6 Nursing Fundamentals Potter Perry 12e Part 4 pp. 253-255, 254-255

E6 Nursing Fundamentals Taylor p. 724-726

Practise the full GMCH - 2015

Attempt every question from this paper in a timed mock, then review the full solution for each one.