What Is the GE Corometrics 3919BAO Compatible Fetal Event Marker?

The GE Corometrics 3919BAO compatible fetal remote event marker is a reusable, handheld push-button accessory for fetal monitors. During a non-stress test or labor monitoring, the patient presses the button each time she feels fetal movement. The monitor then places a mark on the strip chart and electronic record, aligned with the fetal heart rate and uterine activity tracings. Clinicians use these patient-reported marks to relate fetal movement to heart rate accelerations when interpreting the trace. This event marker is a compatible replacement, not an original GE or Philips part, and it is built to the same fit, form, and function as the OEM 3919BAO event marker.

Compatible Monitor Models

This compatible event marker is confirmed for use with a wide range of fetal monitors. For GE Healthcare Corometrics, that includes the 115, 116, 118, 120, 130, 145, 150, 155, 170, 171, 250, and 250cx. For Philips, it includes the M1350A, M1350B, M1351A, M1353A, M2922A, and 8040A. It also fits the Edan F2, F3, F6, F9, and F9 Express, and the Bionet FC1400 and FC700. This broad compatibility lets labor and delivery units and antepartum testing areas standardize on one event marker across mixed-brand fetal monitor fleets, which simplifies stocking and replacement.

Design and Construction

The event marker has a handheld body with a single push button that is easy for patients to find and press without looking. The 9.8 ft (3.0 m) cable lets the patient hold the marker comfortably in the bed or a recliner while the monitor stays out of the way. It is latex-free, non-sterile, reusable after cleaning between patients according to facility protocol, weighs about 0.4 lbs, and ships one per bag.

When to Replace Your Fetal Event Marker

Event markers are handled constantly by patients, so buttons and cables wear out over time. Replace the marker when button presses stop registering on the trace or register only intermittently, when the button sticks or no longer clicks, when marks appear without a press, or when you find a cracked housing, a damaged cable jacket, or a connector that no longer seats firmly in the monitor. Checking the marker on a second monitor quickly shows whether the fault is in the marker or the monitor’s input.

Cross Reference and Interchange Part Numbers

This compatible fetal remote event marker, IPR Medical SKU FM-001, cross-references to GE Healthcare Corometrics part numbers 3919BAO, 2107349-001, and 5924508, and to Philips part number M15249A. It also interchanges with Edan 02.01.210095, Huntleigh EM1 and EM1L, Bionet FC-EM and MD17F, and USOC15249A. Materials managers and purchasing staff can use any of these numbers to confirm the match against existing inventory, work orders, or requisitions. Contact IPR Medical if you are replacing a part number not listed here and need help confirming compatibility.

Why Source Fetal Monitoring Accessories from IPR Medical?

IPR Medical is an ISO 9001:2015-certified independent service organization that buys, sells, repairs, and stocks parts for fetal monitoring, patient monitoring, and infusion equipment. We supply compatible fetal accessories alongside repair and resale of fetal monitors and transducers, so labor and delivery departments can source event markers, transducers, and monitor service from one partner. Our team can help confirm the right accessory for each monitor in your fleet and support your equipment with in-house repair services.

IPR Medical buys, sells, repairs, and stocks parts for GE Corometrics and Philips fetal monitors. Contact us at 855-477-8866 or cs@iprmed.com.

Trademark Notice: This is a compatible aftermarket product. It is not manufactured, sold, licensed, or endorsed by GE Healthcare, Corometrics, Philips, or any other manufacturer or supplier named on this page. GE Healthcare, Corometrics, Philips, and all other brand names, model names, and part numbers shown are trademarks of their respective owners and are used on this page only to identify the equipment this product is compatible with and the OEM parts it can replace, consistent with nominative fair use. IPR Medical is an ISO 9001:2015-certified independent service organization; references to OEM equipment describe the equipment we sell, service, and support, and do not indicate any affiliation with, sponsorship by, or endorsement from its manufacturer.