Which statement is an advantage of Sidestream sampling?

Which statement is an advantage of Sidestream sampling?

• A. It adds bulk and dead space
• B. It constantly stays calibrated, adds no weight to the airway, and can measure anesthetic gases
• C. It can measure anesthetic gases but adds weight to the airway
• D. It cannot be calibrated

Answer: (B)

Sidestream sampling works by pulling a small, continuous gas sample from the patient’s airway through a thin line to an external analyzer. Because the sample line is lightweight and the analysis happens outside the airway, it adds virtually no weight to the airway and contributes minimal dead space or resistance. This setup lets the monitor assess multiple gases—such as oxygen, carbon dioxide, and anesthetic vapors—without altering the patient’s airflow. In addition, these systems are designed to stay calibrated during use, helping maintain accurate readings. This combination—negligible impact on the airway and the ability to measure anesthetic gases—makes it a clear advantage of sidestream sampling.

Sidestream sampling works by pulling a small, continuous gas sample from the patient’s airway through a thin line to an external analyzer. Because the sample line is lightweight and the analysis happens outside the airway, it adds virtually no weight to the airway and contributes minimal dead space or resistance. This setup lets the monitor assess multiple gases—such as oxygen, carbon dioxide, and anesthetic vapors—without altering the patient’s airflow. In addition, these systems are designed to stay calibrated during use, helping maintain accurate readings. This combination—negligible impact on the airway and the ability to measure anesthetic gases—makes it a clear advantage of sidestream sampling.