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Endotracheal tube suctioning is a vital component of bronchial hygiene therapy by applying negative pressure to facilitate the removal of pulmonary secretions resulting in promotion of gas exchange. Hence the study was conducted to compare the effect of two different levels of 120mmHg and 200mmHg of negative pressure in open endotracheal tube suctioning on physiological indices. Pre-experimental research design was adopted to conduct the study with 60 samples and were allocated into experimental group I (n=30) and experimental group II (n=30). Pre-test assessment was done by assessing Oxygen saturation, respiratory rate, heart rate and mean arterial pressure for both the groups. Open endotracheal tube suctioning was done by applying negative pressure of 120 mmHg to experimental group I and 200 mmHg to experimental group II. Post-test was done immediately, 5 minutes, and 20 minutes after suctioning for both experimental groups. The results of the study reveal the significant changes in both the group however highly significant changes observed in oxygen saturation (p<0.001), respiratory rate (p<0.001), and heart rate (p<0.001) in high level negative pressure. The findings of the study concluded that 200 mmHg negative pressure is safe and can be recommended for open endotracheal tube suctioning for effective oxygen saturation, respiratory rate, and heart rate.


Endotracheal suctioning Heart rate Mechanical ventilation Negative pressure Oxygen saturation Physiological indices Respiratory rate

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How to Cite
Sheeba Rajakumari S, Thenmozhi P, & Kala Barathi S. (2020). Two Levels of Negative Pressure in Open Endotracheal Tube Suctioning on Physiological Indices. International Journal of Research in Pharmaceutical Sciences, 11(SPL4), 70-80.