Which equipment is commonly used to measure respiration during polysomnography?

The correct answer involves the use of respiratory effort belts and nasal cannulas, which are critical components in polysomnography for measuring respiration.

Respiratory effort belts are elastic bands placed around the chest and abdomen to detect the expansion and contraction of the thoracic and abdominal areas during breathing. This allows for the monitoring of the pattern and quality of respiratory effort, which is essential for diagnosing sleep-disordered breathing, such as obstructive sleep apnea.

Nasal cannulas are used to measure airflow through the nasal passages. They consist of small tubes that sit in the nostrils, allowing for the detection of inhaled and exhaled breaths. By measuring airflow, clinicians can assess the patient's ventilation and confirm the presence of any apneas or hypopneas during sleep.

Together, these two tools provide a comprehensive view of a patient's respiratory function during the sleep study, allowing for accurate diagnosis and treatment planning. The other options mentioned do not focus specifically on measuring respiration or lack the capability to gather the necessary respiratory data as effectively as respiratory effort belts and nasal cannulas do.