The Effect of Acupressure Application on Respiratory Performance and Pain Levels in Adult Patients Undergoing Cardiac Surgery

Experimental: Acupressure Group

Acupressure will be applied to the LI4 (Hegu) (on the dorsum of the hand, between the 1st and 2nd metacarpal bones), LU7 (Lieque) (on the radial side of the forearm, approximately 3.75 cm [1.5 cun] above the wrist crease), and PC6 (Neiguan) (on the palmar aspect of the forearm, approximately 5 cm [2 cun] above the wrist crease) acupoints (Appendix-4), which are reported in the literature to positively affect pain and the respiratory system. The intervention will be performed by a researcher holding an acupressure certification. Using the thumb, index finger, or middle finger, pressure will be applied to the identified LI4, LU7, and PC6 points to a depth of 1 to 1.5 cm for 10 seconds. After a 2-second release, the pressure will be continued for 2 minutes (Düzel et al., 2023; Vanzini et al., 2021; Narimani et al., 2018).

Conductual: Acupressure

Acupressure will be applied to the LI4 (Hegu) (on the dorsum of the hand, between the 1st and 2nd metacarpal bones), LU7 (Lieque) (on the radial side of the forearm, approximately 3.75 cm [1.5 cun] above the wrist crease), and PC6 (Neiguan) (on the palmar aspect of the forearm, approximately 5 cm [2 cun] above the wrist crease) acupoints (Appendix-4), which are reported in the literature to positively affect pain and the respiratory system. The intervention will be performed by a researcher holding an acupressure certification. Using the thumb, index finger, or middle finger, pressure will be applied to the identified LI4, LU7, and PC6 points to a depth of 1 to 1.5 cm for 10 seconds. After a 2-second release, the pressure will be continued for 2 minutes (Düzel et al., 2023; Vanzini et al., 2021; Narimani et al., 2018).

Conductual: Incentive spirometry

The study will use a triflow device, which consists of three separate chambers and a breathing tube with a mouthpiece. The chambers contain colored balls corresponding to flow volumes of 600, 900, and 1200 mL/sec, respectively. An inspiratory flow of 600 mL/sec raises the ball in the first chamber, an inspiratory flow of 900 mL/sec raises the ball in the second chamber, and an inspiratory flow of 1200 mL/sec raises the ball in the third chamber (Amin et al., 2021).

To measure inspiratory flow rate and volume, patients will be instructed to seal their lips tightly around the triflow mouthpiece, ensuring no gaps remain. Patients will be asked to take a deep and slow breath to raise the balls. Subsequently, to measure expiratory flow rate and volume, they will be asked to remove the mouthpiece, hold their breath for 3 to 5 seconds, and then exhale normally (Gökçe et al., 2025).

Comparador falso: Placebo Acupressure Group

In the placebo acupressure group, all procedural steps will be performed in the exact same manner as in the true acupressure group. However, very light pressure will be applied to sham areas located 1.5 cm away from the LI4, LU7, and PC6 acupoints that do not fall on any meridian. Using the thumb, index finger, or middle finger, this very light pressure will be applied to each point for 10 seconds, followed by a 2-second rest, continuing for 2 minutes per point. The application will be performed bilaterally and will take an average of 15 minutes. Following the procedure, a 20-minute resting period will be provided.

Conductual: Incentive spirometry

The study will use a triflow device, which consists of three separate chambers and a breathing tube with a mouthpiece. The chambers contain colored balls corresponding to flow volumes of 600, 900, and 1200 mL/sec, respectively. An inspiratory flow of 600 mL/sec raises the ball in the first chamber, an inspiratory flow of 900 mL/sec raises the ball in the second chamber, and an inspiratory flow of 1200 mL/sec raises the ball in the third chamber (Amin et al., 2021).

To measure inspiratory flow rate and volume, patients will be instructed to seal their lips tightly around the triflow mouthpiece, ensuring no gaps remain. Patients will be asked to take a deep and slow breath to raise the balls. Subsequently, to measure expiratory flow rate and volume, they will be asked to remove the mouthpiece, hold their breath for 3 to 5 seconds, and then exhale normally (Gökçe et al., 2025).

Conductual: Placebo Acuprresure

In the placebo acupressure group, all procedural steps will be performed in the exact same manner as in the true acupressure group. However, very light pressure will be applied to sham areas located 1.5 cm away from the LI4, LU7, and PC6 acupoints that do not fall on any meridian. Using the thumb, index finger, or middle finger, this very light pressure will be applied to each point for 10 seconds, followed by a 2-second rest, continuing for 2 minutes per point. The application will be performed bilaterally and will take an average of 15 minutes. Following the procedure, a 20-minute resting period will be provided.

Comparador activo: control group

Patients in this group will receive only standard postoperative nursing care and routine incentive spirometry exercises.

Conductual: Incentive spirometry

The study will use a triflow device, which consists of three separate chambers and a breathing tube with a mouthpiece. The chambers contain colored balls corresponding to flow volumes of 600, 900, and 1200 mL/sec, respectively. An inspiratory flow of 600 mL/sec raises the ball in the first chamber, an inspiratory flow of 900 mL/sec raises the ball in the second chamber, and an inspiratory flow of 1200 mL/sec raises the ball in the third chamber (Amin et al., 2021).

To measure inspiratory flow rate and volume, patients will be instructed to seal their lips tightly around the triflow mouthpiece, ensuring no gaps remain. Patients will be asked to take a deep and slow breath to raise the balls. Subsequently, to measure expiratory flow rate and volume, they will be asked to remove the mouthpiece, hold their breath for 3 to 5 seconds, and then exhale normally (Gökçe et al., 2025).

Inspiratory and Expiratory Airflow Volume and Rate

Airflow rate (mL/sec) and volume (mL) will be measured using a three-chamber incentive spirometer (triflow). The average of the three highest values obtained during five inspirations and five expirations will be recorded.

Postoperative Pain Severity

Pain severity will be assessed using the Visual Analog Scale (VAS) ranging from 0 (no pain) to 10 (most severe pain).

State and Trait Anxiety Levels

Anxiety will be assessed using the State-Trait Anxiety Inventory (STAI), which consists of 40 items on a 4-point Likert scale. Scores range from 20 to 80, with higher scores indicating higher anxiety levels.

Chest Tube Removal Time

The duration from the end of the surgical procedure until the removal of the chest tube. This outcome will be measured and reported in hours.