Comprehensive Guide to Incentive Spirometry: Technique, Indications, and Clinical Management

Definition: An incentive spirometer is a handheld, plastic medical device used in respiratory therapy to measure the volume of air inhaled into the lungs during the inspiration phase of breathing.
Primary Functions:
- Improvement of overall oxygen flow throughout the body.
- Prevention of various respiratory complications, particularly in clinical settings.
- Facilitation of inspiratory muscle training to strengthen the diaphragm and intercostal muscles.
- Prevention of mucus and secretion buildup within the airways.
- Reversing lung collapse by encouraging deep, sustained breaths.

Lung Expansion: The device is integral to increasing total lung capacity. By encouraging deep breaths, it helps open the alveoli (microscopic air sacs), allowing the lungs to expand fully. This results in significant improvements in oxygen exchange and overall respiratory function.
Mitigation of Post-operative Pulmonary Complications: Surgical patients often produce shallow breaths due to the effects of anesthesia, post-surgical pain, or decreased mobility. The incentive spirometer assists in maintaining lung integrity and supports the movement and clearance of secretions or mucus buildup that can occur during recovery.
Promotion of Deep Breathing: The device provides real-time, visual feedback to the user. This feedback serves as a method of encouragement, helping the patient follow specific indicators to achieve slower and deeper breaths rather than rapid, shallow ones.

Step 1: Positioning: Ensure the patient is seated in either the Fowler’s or high-Fowler’s position to allow for maximum chest expansion.
Step 2: Preparation: Instruct the patient to exhale completely first. Then, have the patient place the mouthpiece between their lips, ensuring a tight seal is maintained.
Step 3: Inhalation: The patient must inhale slowly and deeply. This action should raise the ball or piston within the device to the pre-determined target level.
Step 4: Breath Hold: Once the target is reached, the patient should maintain the inhaled breath for a duration of $3-5\,\text{seconds}$ before exhaling slowly.
Step 5: Frequency: This cycle should be repeated $10$ times every hour during the hours the patient is awake.
Step 6: Clearance: After completing the set of $10$ breaths, the patient should cough to help clear any excess secretions mobilized from the lungs.

Postoperative Patients: Specifically those recovering from surgeries that impact breathing or mobility.
Prolonged Immobility: Patients who are bedridden or have significantly limited movement, increasing the risk of fluid stasis in the lungs.
Respiratory Illness: Patients suffering from conditions that compromise lung volume or efficiency.

Atelectasis: This involves the partial or complete collapse of a lung or a specific lobe of a lung.
- Signs and Symptoms (S/S): Diminished breath sounds upon auscultation, dyspnea (shortness of breath), and low oxygen saturation levels.
Pneumonia: An infection causing inflammation in the alveoli of one or both lungs, leading to the air sacs filling with fluid or pus.
- Signs and Symptoms (S/S): Fever, persistent cough, chest discomfort, and abnormal lung sounds (e.g., crackles).
Hypoxemia: Defined as abnormally low levels of oxygen within the blood.
- Signs and Symptoms (S/S): Tachycardia (rapid heart rate), confusion, restlessness, and cyanosis (bluish discoloration of the skin or mucous membranes).

Inhaling Too Quickly: Patients often try to force the air in.
- Correction: Instruct the patient to inhale slowly and steadily, using the metaphor of "slowly sipping through a straw."
Irregular Use: Patients may forget to use the device at the prescribed intervals.
- Correction: Reinforce the prescribed frequency ( $10$ times per hour), provide physical reminders, and educate the patient on the benefits of compliance to encourage regular use.
Incorrect Body Alignment: Using the device while lying flat restricts lung expansion.
- Correction: Instruct the patient to sit upright or assist them in elevating the head of the bed before beginning the exercise.

Patient Teaching Strategies:
- Demonstrate the proper technique independently before asking the patient to try.
- Utilize the "teach-back" method to verify patient understanding.
- Set realistic and attainable volume goals for the patient.
- Ensure the patient understands the necessity of coughing after taking several deep breaths.
- Reinforce the requirement of $10$ repetitions every hour while awake.
Monitoring Patient Compliance:
- Monitor the patient’s progress toward their specific volume goals.
- Verify that the spirometer is being used exactly as prescribed.
- Observe the patient's technique periodically to ensure continued accuracy.
- Provide education reinforcement and positive encouragement to promote consistent behavior.
Documentation Requirements:
- Record the patient’s response to the treatment.
- Document any coughing or sputum production (including color, consistency, and amount).
- Note the frequency of use and the level of patient participation.
- Assess and record respiratory status, including oxygen saturation ( $O_2$ ), respiratory rate ( $RR$ ), and breath sounds.

Cleveland Clinic. (2022). Incentive spirometer: Purpose, goals & how to use.
Franklin, E., & Anjum, F. (2022). Incentive Spirometer and Inspiratory Muscle Training. PubMed; StatPearls Publishing.
Pullen, R. L. J. (2003). Teaching bedside incentive spirometry. Nursing2020, $33(8)$ , $24$ .