Related Experiment Videos
The effect of continuous positive airway pressure on middle ear pressure
Bekir Sivri1, Ozan Seymen Sezen, Sevtap Akbulut
1Otolaryngology Head and Neck Surgery Clinic, Bingol State Hospital, Bingol, Turkey.
Objectives/Hypothesis:
To investigate the effect of continuous positive airway pressure (CPAP) on middle ear pressure in patients with obstructive sleep apnea syndrome (OSAS).
Study Design:
Prospective clinical case-control study.
Methods:
Seventy-eight patients with moderate and severe OSAS (the mean apnea-hypopnea indexes were 22.70 ± 3.59 and 48.59 ± 12.50, respectively) using CPAP (study group) and 60 patients with no sleep apnea syndrome (control group) were included in the study. Forty-two of the patients were female and 96 were male. The mean age in the study group was 47.38 ± 6.23, whereas it was 46.10 ± 11.96 in the control group (P > .05). The middle ear pressure of all study subjects was evaluated with tympanometry at the beginning of the study and 6 months later. Tympanometric measurements of both groups were compared. Furthermore, the same data for the study group were also evaluated according to CPAP pressure levels.
Results:
The middle ear peak pressure values of the patients in the study group were significantly increased from -63.04 ± 55.82 daPa to -39.6 ± 27.72 daPa after 6 months (P < .01). The middle ear pressure in the control group was found to be -13.26 ± 22.60 daPa at the beginning of the study and -13.60 ± 38.82 daPa after 6 months (P > .05). The mean middle ear pressure level was significantly higher in patients using CPAP at 12 to 14 cm H2 O pressure than in those using CPAP at 8 to 10 cm H2 O pressure (P < .05).
Conclusions:
There was a significant increase in the middle ear pressure of patients using CPAP regularly for 6 months. This increase was proportional to the pressure level of the CPAP device.
Level Of Evidence:
3b.
Related Concept Videos
Mechanical Ventilation III: Noninvasive Ventilation
Noninvasive Positive-Pressure Ventilation (NIPPV)
Pressure Relationships in Thoracic Cavity
Breathing Mechanisms
Both intra-alveolar and intrapleural pressures rely on specific lung properties. The ability to breathe—allowing air to enter the lungs during...
Mechanical Ventilation II: Invasive Ventilation
Negative-Pressure Ventilators
Negative-pressure ventilators create a vacuum around the chest or body to draw air into the lungs, simulating breathing. This method does not require an...
Factors Affecting Pulmonary Ventilation
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
Chest Physiotherapy
Purpose
CPT is primarily used for patients with excessive bronchial secretions who have difficulty clearing...
Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features