Digital Stethoscopes in EMS: Using the Littmann Eko CORE 500

For over 200 years, the stethoscope has been one of the most recognizable tools in medicine. Despite massive advances in imaging, laboratory testing, and monitoring technology, clinicians still rely heavily on auscultation to guide immediate decisions.

In recent years, digital stethoscopes like the Littmann Eko CORE 500 have begun changing how clinicians hear — and interpret — those sounds.

For providers working in noisy environments like emergency departments, ambulances, and helicopters, enhanced audio technology may provide a meaningful advantage.

But it also introduces an interesting clinical question: what happens when one clinician can hear something that another cannot?

What Makes the Eko CORE 500 Different

The Littmann Eko CORE 500 combines a traditional stethoscope with digital signal processing. Unlike acoustic scopes that rely purely on mechanical sound transmission through tubing, digital stethoscopes convert sound into electronic signals that can be amplified, filtered, and analyzed.

Key features include:

• Up to 40× sound amplification
• Active noise cancellation to reduce environmental noise
• The ability to record and replay heart and lung sounds
• Integrated single-lead ECG capability
• Optional AI analysis to help screen for murmurs or atrial fibrillation (Eko Health)

In environments like rotor-wing transport or crowded emergency departments, these features can make auscultation significantly easier.

What the Research Says About Digital Stethoscopes

Research on digital stethoscopes is still developing, but several studies suggest they may improve the ability to detect subtle abnormalities.

A study published in JMIR Cardio compared contemporary digital stethoscopes and found measurable differences in the ability to detect cardiac sounds such as S1, S2, and murmurs. The results suggested that sound quality and detection capability vary between devices, indicating that digital technology can influence how well clinicians identify auscultatory findings. (cardio.jmir.org)

Another recent multi-center observational study using an Eko digital stethoscope with ECG capability evaluated whether the device could help detect reduced left ventricular ejection fraction (≤40%). Among 867 analyzed patients, the system identified reduced ejection fraction with a specificity of 81.3%, suggesting potential usefulness as a clinical screening tool. (ScienceDirect)

Importantly, these technologies are intended to assist clinicians, not replace clinical judgment.

Real-World Experience in the HEMS Environment

In helicopter EMS, auscultation can be extremely challenging.

Between turbine noise, vibration, headsets, and patient packaging, hearing lung or heart sounds clearly can be difficult even with a high-quality acoustic stethoscope.

Using the Eko CORE 500, I have personally noticed situations where I can hear sounds that others cannot.

A common example occurs when evaluating lung sounds:

A partner using a standard acoustic stethoscope might report “absent lung sounds in the bases.”

Using the digital scope, I may be able to hear very diminished airflow rather than complete absence.

From a practical standpoint, both clinicians often reach the same conclusion:

Something is wrong with the lungs.

But the description of the finding may differ.

Most of the time this discrepancy doesn’t change management.

However, it raises an interesting question in very specific clinical scenarios.

When Better Hearing Could Change a Decision

Consider needle decompression for suspected tension pneumothorax.

In many EMS systems, one of the clinical triggers is:

Absent lung sounds on one side.

If one provider using a traditional stethoscope hears nothing and another provider using enhanced audio hears faint airflow, the clinical description changes:

• One clinician documents absent
• The other documents diminished

This creates a theoretical divergence in treatment pathways.

Would the clinician with enhanced hearing delay a needle decompression?

Would that be the correct decision — or would it introduce risk by over-interpreting subtle sounds?

There isn’t a clear answer yet.

Digital tools may allow us to detect physiology that traditional tools miss, but protocols and training have historically been written around the limitations of acoustic equipment.

As technology improves, clinical guidelines may eventually need to evolve alongside it.

Technology Doesn’t Replace Clinical Judgment

Despite the impressive capabilities of devices like the Eko CORE 500, they remain tools — not decision makers.

Digital amplification may allow clinicians to:

• Hear subtle airflow
• Detect faint murmurs
• Auscultate more effectively in noisy environments

But clinical context still matters.

A patient with hypotension, respiratory distress, unilateral chest trauma, and tracheal deviation probably doesn’t need a perfect auscultatory exam before treatment.

At the same time, improved diagnostic tools may help clinicians better characterize subtle pathology and document more accurate physical exams.

The Future of Auscultation

The stethoscope is unlikely to disappear anytime soon.

Instead, it appears to be evolving.

Digital amplification, signal processing, and AI-assisted interpretation may help clinicians:

• Detect abnormalities earlier
• Share and record sounds for consultation
• Improve diagnostic confidence in difficult environments

For providers in EMS, critical care transport, and HEMS, tools like the Littmann Eko CORE 500 can provide a significant practical advantage.

Just be aware that better hearing may sometimes reveal a new challenge:

When you can hear something others cannot, clinical interpretation becomes just as important as the technology itself.

Don’t forget to protect your investment. Digital stethoscopes like the Littmann Eko CORE and CORE 500 are powerful clinical tools, but they’re also expensive pieces of equipment that can easily be damaged in busy clinical environments. At 1393 Productions, I design and manufacture protective devices specifically to help shield these scopes from impact, drops, and day-to-day wear. If you want to keep your gear working as hard as you do, check out the protective options available in my shop.

Author:

Jay Korza, FP-C

HEMS clinician and founder of 1393 Productions