PM stands for which device used in sleep testing?

• A. Portable Monitor
• B. Unattended Portable Monitor
• C. Portable Monitoring System
• D. Unmonitored Portable Monitor

Answer: (B)

In sleep testing, a portable monitor is a device designed for home (out-of-lab) use to assess breathing and related signals without requiring full in-lab polysomnography. The key distinction is whether a technologist is present during the test. When the study is performed without on-site supervision, it’s described as unattended. That combination—portable monitor used without a technologist present—defines the standard term used in guidelines and exams. So the best match is Unattended Portable Monitor, since it specifies both the portable nature of the device and that the test is conducted without supervision. The other phrases either omit the unattended usage or don’t align with the conventional terminology for this sleep-testing device.