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Connecting a Werfen GEM Hemochron 100 to your LIS or EHR
Quick answer
The GEM Hemochron 100 has built-in Wi-Fi and Ethernet, with automatic two-way data transfer and remote management through Werfen's GEMweb Plus 500. Werfen does not publish the message format, so the route into Catenix, direct or through GEMweb Plus, is confirmed during setup. From there Catenix sends each ACT to your EHR or LIS with the operator recorded.
The GEM Hemochron 100 is Werfen's newer handheld ACT system for heparin monitoring during cardiac surgery, catheter ablation, PCI in the cath lab and ECMO in intensive care. It runs ACT+ for moderate to high heparin doses (1 to 6 U/mL) and ACT-LR for lower doses (up to 2.5 U/mL), with an ACT+ result in around four minutes.
It uses one drop of fresh whole blood, about 35 microlitres, of which roughly 15 are tested. The FDA cleared it in December 2021.
| What | How Catenix handles it |
|---|---|
| Tests | ACT+ and ACT-LR |
| Result time | About 4 minutes for ACT+ |
| Networking | Wi-Fi 802.11 b/g/n and Ethernet, encrypted |
| Records held | Up to 10,000 patient and QC records |
| Cartridge ID | 2D barcode read by an internal camera |
| Remote management | GEMweb Plus 500 (Werfen) |
Heparin dosing needs the whole timeline
During bypass or ECMO, clinicians compare each ACT with the baseline. The analyser shows the patient's ACT history on screen, and Werfen describes automatic transfer of results to the HIS or LIS. Catenix carries each result into the record against the right patient and with the operator who ran it, so the full series is visible there too.
Operator and patient IDs are scanned with the external scanner or entered on the touchscreen, while the internal camera reads the cartridge's test type, lot and expiry. A result that does not match a known patient waits for review.
QC rules set by the hospital
Sites choose how often QC is due, which lots are allowed, and whether testing is blocked when QC has expired or failed. Two levels of electronic QC run automatically or by hand, and liquid controls are also supported.
In Catenix, any liquid control results received are separated from patient data, graded with Westgard rules and charted on Levey-Jennings plots, and a failed control holds patient ACTs.
Wi-Fi in theatre, gateway on site
On Wi-Fi or Ethernet, the Catenix gateway sits on the hospital network, reconnects after a drop and holds results on site through an internet outage. ACT+ and ACT-LR are mapped to your EHR's codes during setup, and each message is stored with its result.
Werfen and GEM Hemochron 100 are trademarks of their owners. Catenix is an independent connectivity provider, not affiliated with or endorsed by Werfen.
Questions people ask
Does the GEM Hemochron 100 connect wirelessly?
Yes. It has built-in Wi-Fi (802.11 b/g/n) and Ethernet, with encrypted, automatic two-way data transfer.
How is it different from the Hemochron Signature Elite?
It focuses on ACT+ and ACT-LR, adds Wi-Fi and a large touchscreen, and holds up to 10,000 records.
How much blood does a test use?
One drop of fresh whole blood, about 35 microlitres, of which around 15 are used.
Related: Werfen Hemochron Signature Elite connection · Werfen GEM Premier 3500 connection · QC lockout and operator competency · Device library
Product and company names are trademarks of their owners and are used for identification only. Catenix moves, stores and displays results with traceability; it does not interpret results or give clinical advice. Reviewed November 2026.
Tell us your setup
Send us your analyser and the system you want results in, and we will confirm how it connects, usually within one working day. Ask about your setup.