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Inside the ELSA Monitor: Transforming ECMO Care

By Transonic Staff13 May 2025

Managing Extracorporeal Membrane Oxygenation ECMO isn’t just about reacting to problems. It’s about staying ahead of them. With so many variables at play and patients’ wellbeing at stake, making the right calls at the right time can be life-changing. 

The right tools help you make those calls and navigate the complexities of ECMO care with confidence. 

Enter the ELSA® Monitor, a game-changing device that gives ECMO care teams the insights needed to make proactive, data-driven decisions on the spot. Real-time measurements help detect clotting, verify blood flow and optimize catheter placement – all from one piece of technology.

A Trio of Measurements That Matter

ECMO teams don’t have a crystal ball, but the ELSA® Monitor provides the next best thing: real-time data on recirculation, delivered blood flow, and oxygenator blood volume (OXBV)—alerting teams to issues before they escalate.

This means you can identify and correct excessive recirculation. You can verify that the patient is receiving the correct blood flow. And you can measure OXBV. 

Why care about OXBV? Measuring OXBV allows care teams to:

  • Detect changes in oxygenator blood volume early on
  • Track trends over time to assess circuit performance
  • Proactively exchange oxygenator and avoid emergency change-outs 

 

How the ELSA Monitor Works

The ELSA® Monitor makes tracking these three measurements simple. Here’s how it works for measuring oxygenator blood volume, for example. 

  1. Non-Invasive Sensors: Clamp-on sensors attach to arterial and venous bloodlines without disrupting flow.
  2. Ultrasound Dilution Technology: A saline bolus is injected upstream and the monitor calculates oxygenator blood volume in real-time.
  3. Real-Time Data and Graphs: A touchscreen displays trends, allowing teams to act proactively.

A drop in OXBV may signal changes within the oxygenator, prompting further assessment and potential intervention.

ELSA: The Key to Proactive ECMO Care

At Transonic, we’ve spent over 40 years creating tools that empower healthcare teams like yours to stay ahead. The ELSA® Monitor transforms how ECMO is managed, giving teams the data needed to detect problems early, act proactively and avoid unnecessary emergencies. 

Explore the Benefits of Measuring OXBV