RPM Devices Explained: CGMs, BP Cuffs, Pulse Oximeters & More

Not every gadget that logs a health reading counts as a remote patient monitoring device. Here's what separates an RPM-qualifying device from a consumer wellness tracker, and a walkthrough of the categories practices most commonly deploy.

What actually makes a device "RPM-qualifying"

Remote patient monitoring programs are built around a fairly narrow definition of "device." Two characteristics tend to matter most:

• It's an FDA-defined medical device. The device has to fall under FDA's medical device framework, which generally means it went through a clearance, approval, or classification pathway rather than being sold purely as a consumer wellness product. This is why a hospital-grade blood pressure cuff can qualify while a general fitness tracker typically does not.
• Data moves automatically, not by patient self-report. The device has to capture and transmit physiologic data digitally, without the patient re-typing a number into an app or reading it aloud over the phone. A patient who jots down a home BP reading and calls it in is not generating RPM data in the way the category is meant to work; a cuff that pairs to a hub and pushes the reading to the cloud on its own is.

Together, these two traits are what separate "monitoring" from "logging." A device that requires manual entry introduces transcription error and recall bias, and it can't demonstrate the kind of near-real-time data flow that remote monitoring programs are designed around. Automatic transmission is also what allows a care team to see trends and flags between visits, rather than a single number reported after the fact.

Below are the device categories most often used in RPM programs. Each one is FDA-regulated in its relevant class and transmits readings without the patient having to enter them by hand.

Continuous glucose monitors (CGMs)

A CGM uses a small sensor worn on the skin to sample interstitial glucose at regular intervals throughout the day and night, then sends those readings over Bluetooth to a paired smartphone app or reader. Because the sensor takes its own readings automatically, a CGM produces a much denser data stream than periodic fingerstick testing — dozens to well over a hundred data points a day rather than a handful.

Several manufacturers make FDA-cleared CGMs used in RPM programs today, including Dexcom, Abbott (FreeStyle Libre), and Eversense. Each has its own sensor wear duration, app, and data-sharing mechanism; Endobits does not manufacture any of these devices, but it can ingest and organize CGM data from supported platforms so a care team can review trends in one place rather than switching between manufacturer apps.

Cellular and Bluetooth blood pressure cuffs

Connected BP cuffs work the same way a standard home cuff does mechanically, but they transmit each reading electronically the moment it's taken — either directly over a built-in cellular connection or via Bluetooth to a paired hub or app. This is the key distinction from a traditional home cuff: the patient still puts the cuff on and takes the reading, but they don't have to remember, write down, or report the number themselves. The reading reaches the practice automatically, with the timestamp attached.

Pulse oximeters

A connected pulse oximeter clips onto a fingertip and measures blood oxygen saturation and pulse rate, then transmits the reading digitally rather than requiring the patient to read a small screen and report it. These are frequently used for patients managing chronic respiratory or cardiopulmonary conditions, where a downward trend in oxygen saturation between visits can be a meaningful early signal.

Connected weight scales

A cellular or Bluetooth-enabled scale transmits each weigh-in automatically to the monitoring platform. Weight trends are commonly used in heart failure and other cardiometabolic monitoring programs, where a rapid change over a short period can indicate fluid retention or another issue worth a clinical look before it becomes a hospitalization.

Cardiac monitors

This category covers a range of FDA-regulated devices — from connected single-lead ECG monitors to more comprehensive cardiac event monitors — that capture heart rhythm data and transmit it digitally for review. As with the other categories, the defining trait isn't the specific technology inside the device; it's that the data leaves the device and reaches the practice without the patient having to describe symptoms after the fact or transcribe a reading themselves.

How the data actually gets to your practice

The path is broadly similar across device categories, even though the underlying technology varies:

1. Device to hub or app. The device pairs with either a dedicated cellular hub (common for patients without a smartphone or reliable Wi-Fi) or a smartphone app over Bluetooth.
2. Hub or app to the cloud. The hub or app forwards the reading over a cellular or internet connection to the manufacturer's or platform's cloud service, usually within minutes of the reading being taken.
3. Cloud to the clinical platform. From there, the data is organized, and in many programs surfaced inside a clinical decision-support or monitoring dashboard the care team already uses, so readings from different device types can be reviewed alongside each other rather than in separate manufacturer portals.

This is the layer where a platform like Endobits fits: it doesn't replace the device or the transmission infrastructure, but it aggregates the incoming data and helps a care team make sense of it once it arrives.

Related: Remote patient monitoring: the complete guide, Choosing a CGM, All resources