Inside the healing trajectory: how WoundScribe detects a stalled DFU

The four-week, 50% area reduction threshold is the pivot point for advanced wound therapies — topical oxygen, skin substitutes, HBO. Here's how WoundScribe's healing dashboard turns that threshold from a manual calculation into an automated trigger.

Consistent measurements are the foundation

Trajectory math only works when each data point is comparable. WoundScribe's AI-powered wound imaging captures length, width, depth, and area using computer-vision edge detection — no calibration marker required. Every image carries timestamp and device metadata so measurements can't drift between visits or clinicians.

The trajectory curve

The dashboard plots wound area over time from the first encounter. At each visit it computes:

• Absolute area change since baseline
• Percent area reduction since baseline
• Rolling weekly healing rate

At the four-week mark, the system evaluates the stall criterion automatically. If reduction is under 50%, the wound is flagged.

Cross-referencing coverage criteria

A stall alone doesn't qualify a patient. WoundScribe cross-checks the chart for diabetes status, most recent HbA1c, perfusion assessment, and disqualifying findings (osteomyelitis, gangrene, active infection, same-limb DVT, malignancy). If anything is missing, the system surfaces the gap before an order is placed.

From detection to defensible chart

When criteria are met, the recommendation surfaces with the underlying data references so the ordering physician can act — and so WISER can build an audit-ready claim. Wounds that are healing on standard care stay on standard care; stalled wounds get escalated with documentation payers accept.

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