Chronic Plantar Fasciitis Baseline
Repeated strain thickens and inflames the plantar fascia at the heel.
- >4mm: Fascia thickness (vs ~2mm healthy)
- ~50%: Heel-spur prevalence (of chronic cases)
- >6 mo: Pain duration (defines chronic stage)
- Low: Blood flow (degenerative tissue)
Degenerative fascia changes
Collagen fibers disorganize and microtears accumulate over time.
Chronic cases show degeneration, not just inflammation.
Why conservative care stalls
Poor local blood supply limits the fascia's own repair capacity.
Rationale for shockwave therapy
Mechanical stimulation aims to restart a stalled healing response.
Shockwave Probe Application
A handheld probe couples to the heel and fires focused pulses.
- 2000-3000: Pulses per session (typical protocol)
- 0.1-0.4: Energy range (mJ/mm²)
- ~10 min: Session length (outpatient)
- Gel: Coupling medium (transmits acoustic energy)
Focused vs radial waves
Focused probes concentrate energy at a defined tissue depth.
Energy titration
Energy level is tuned to patient tolerance and target depth.
Higher energy reaches deeper but increases discomfort.
Pulse propagation
Pressure waves ripple through tissue as concentric rings.
Controlled Microtrauma Induction
Pulses create tiny, deliberate injury points within the fascia.
- Dozens: Microtrauma sites (per session)
- Micro: Injury scale (sub-millimeter)
- ↑: Cytokine release (growth factor signaling)
- Transient: Pain flare (resolves in days)
Purposeful micro-injury
Small controlled trauma reactivates the tissue repair cascade.
Growth factor release
Damaged cells release signals that summon repair machinery.
Microtrauma is the trigger, not the treatment itself.
Dose dependency
More sessions and energy generate broader microtrauma coverage.
Neovascularization Stimulation
New capillary sprouts grow into the injured fascia over sessions.
- ↑↑: VEGF expression (angiogenic signaling)
- Growing: New capillaries (per treated site)
- Progressive: Blood flow gain (across sessions)
- Weeks: Peak effect (after final session)
Angiogenesis cascade
VEGF and related factors drive sprouting of new vessels.
Neovascularization restores nutrient supply to healing tissue.
Capillary network growth
New vessels branch toward microtrauma sites over time.
Session dependency
Vascular response scales with number of completed sessions.
Tissue Repair & Pain Reduction
Collagen remodels and heel pain gradually resolves over months.
- ~70-80%: Success rate (symptom improvement)
- Progressive: Pain reduction (weeks to months)
- Restored: Collagen realignment (organized fibers)
- 3 months: Outcome window (typical assessment)
Collagen remodeling
Fibers reorganize into a stronger, aligned structure.
Symptom resolution
Pain and stiffness decline as repair progresses.
Full benefit typically appears weeks after therapy ends.
Long-term outlook
Most patients avoid surgery after a full ESWT course.