DolorClast Radial vs. Focused Shockwave: The Truth About Their Differences

When providers compare EMS Swiss DolorClast radial pressure wave technology with electrohydraulic focused shockwave systems like StemWave, the question isn’t “Which device is better?”
It’s which technology is built for the types of conditions you treat.

These devices operate on fundamentally different physics. That difference determines:

• How deep therapeutic energy reaches

• What tissue structures can be treated

• How protocols are structured

• What clinical outcomes are realistic

• How the service integrates into a practice

1. The Real Technology Divide: How Waves Are Generated

Radial Pressure Waves (EMS Swiss DolorClast)

DolorClast uses a ballistic radial pressure wave mechanism, patented by EMS in 1997.

How it works:
Compressed air accelerates a projectile inside the handpiece. The projectile hits a fixed applicator, producing mechanical pressure waves that spread outward from the skin surface.

Wave characteristics:

• Highest energy at the skin surface

• Energy disperses rapidly with depth

• Most meaningful therapeutic effect occurs within ~1–3 cm

• Measured acoustic penetration is roughly 3–4 cm, depending on tissue and settings

• Longer rise times and lower peak pressures than focused shockwaves

This is why EMS refers to the output as radial pressure pulses—they are widely used, clinically valuable for the right indications, but they do not meet the strict physical criteria of a classic focused shockwave.

Electrohydraulic Focused Shockwaves

Electrohydraulic is the original form of extracorporeal shockwave generation.

How it works:
An electrical spark creates a plasma bubble in water. As the bubble expands and collapses, it generates a high-pressure acoustic pulse. A reflector focuses this pulse into a defined focal zone at depth.

Wave characteristics:

• Propagation in tissue at ~1,500 m/s (4–5× faster than sound in air)

• Very rapid pressure rise (on the order of a few–tens of nanoseconds)

• Peak pressures that can reach the tens–hundreds of MPa range

• A broad therapeutic focal zone spanning several centimeters

• Energy converges at depth rather than dispersing at the surface

Electrohydraulic systems are known for having the widest focal zones and deepest energy penetration among focused shockwave technologies.

2. Depth: The Deciding Factor for Most Clinical Indications

Radial Pressure Wave Depth (DolorClast)

Radial waves deliver the majority of their therapeutic energy within the first 1–3 cm and exhibit measurable penetration around 3–4 cm. Beyond that, energy density declines quickly.

This depth range aligns with superficial tendons, fascia, and myofascial trigger points.

Electrohydraulic Shockwave Depth (StemWave)

Electrohydraulic systems can deliver focused energy to 10–12 cm, depending on settings and patient anatomy.

Because the energy converges at depth, the therapeutic dose is not lost as tissue layers increase.

What this means clinically:

• Radial = reliable for surface-level pathology

• Focused = capable of treating both superficial and deep structures with one device

Depth alone explains why focused shockwave is commonly used in cases involving the shoulder, hip, spine, or deep knee—regions simply outside radial’s effective range.

3. Focal Zone Size: Why Coverage Pattern Matters

Radial Pressure Waves

Coverage is broad at the skin surface but loses force with depth.
This makes radial excellent for:

• Superficial myofascial pain

• Broad trigger-point regions

• Surface tendinopathies

Electrohydraulic Focused Shockwaves

Electrohydraulic devices create a large, structured focal zone—often several centimeters wide—allowing providers to treat an entire pathological region (not just a pinpoint).

This is especially important because most degenerative conditions (rotator cuff, hip labrum, meniscal degeneration) are multi-centimeter, multilayer problems rather than single-spot lesions.

4. What Each Technology Treats Best

Best-Fit Conditions for Radial Pressure Waves (DolorClast)

These conditions sit comfortably within radial’s 3–4 cm reach:

• Plantar fasciitis

• Achilles tendinopathy (insertional)

• Patellar tendinopathy

• Medial tibial stress syndrome

• Greater trochanteric pain syndrome (bursal origin)

• Tennis elbow, golfer’s elbow

• Superficial trigger points and myofascial restrictions

Where radial excels: high-volume, surface-level musculoskeletal cases.

Best-Fit Conditions for Electrohydraulic Focused Shockwaves 

Focused shockwave covers all radial indications plus deep or complex pathology:

• Deep rotator cuff tendinopathy and impingement

• Hip labral irritation and deep gluteal syndrome

• Iliopsoas, deep hamstring, and proximal adductor pathology

• Sacroiliac joint dysfunction

• Lumbar facet irritation and deep spinal ligament involvement

• Meniscal degeneration and knee OA

• Post-surgical adhesions affecting deeper layers

• Chronic pelvic and posterior hip pain

If the target tissue is deeper than 3–4 cm, focused shockwave becomes the appropriate modality.

5. Treatment Protocol Differences

Radial Protocols (DolorClast)

• 2,000–3,000 pulses per area

• 15–25 Hz

• 3–5 sessions, 1–2× weekly

• Minimum 72 hours between sessions

• Applicator is moved continuously for broad coverage

This works well for superficial, surface-spread pathology.

Focused Electrohydraulic Protocols (StemWave)

• 300–500 pulses per area

• 8–12 total sessions, typically twice weekly early on

• Focal zone enables targeted, depth-specific dosing

• Providers rely on patient feedback, acoustic changes, and palpation to locate dysfunctional tissue layers

Because energy is delivered efficiently at depth, fewer pulses are required.

6. Practice Integration: Where Each System Makes Sense

Radial Shockwave Fits Best In:

• Podiatry

• High-volume sports medicine

• PT clinics focused on superficial tendinopathies

• Practices prioritizing lower-cost, high-throughput treatments

Radial systems tend to carry a lower capital cost and command modest cash rates ($75–150 per session).

Electrohydraulic Focused Shockwave Fits Best In:

• Multi-specialty MSK clinics

• Chiropractors treating beyond the spine

• Orthopedic and sports medicine practices

• Regenerative medicine and chronic pain settings

• Clinics seeking a single device capable of treating both surface and deep pathology

Due to its versatility and depth capabilities, focused shockwave often supports premium treatment plans ($1,500–2,500 per protocol) and broader patient applicability.

7. Support, Training, and Implementation

EMS Swiss DolorClast

• Swiss DolorClast Academy (theoretical + practical training)

• Device certification and practice finder listings

• Protocol app with 17 indications in multiple languages

• Strong research portfolio, including numerous RCTs using DolorClast radial devices

StemWave

• Comprehensive clinical onboarding covering 50+ conditions

• Large provider community (750+ active users)

• Weekly clinical coaching and case-review calls

• Protocols plus marketing and patient-education systems to help integrate the service line

• Business support for patient acquisition, conversion, and outcomes tracking

Both companies invest heavily in training; the difference is that StemWave’s model includes full practice-integration infrastructure beyond clinical technique.

8. Bottom Line: Which Should a Provider Choose?

Both technologies are clinically valid.
They are simply not designed for the same job.

Choose Radial If:

Your practice primarily treats superficial tendinopathies and myofascial pain and you want a lower-cost, high-volume treatment option.

Choose Focused Electrohydraulic If:

You need to treat a wide spectrum of MSK conditions—including deep, layered, or complex pathology—with one device and want a system that supports premium service-line development.

The real decision comes down to this:

Does your patient population require treatment beyond the first 3–4 cm of tissue?
If the answer is yes, focused shockwave becomes essential.

Learn More About StemWave

If your clinic treats a mix of chronic, complex, and deep musculoskeletal conditions, explore how electrohydraulic focused shockwave may better align with your clinical and business goals by clicking the button below.