Inside Point-n-Capture: Phone-Based Planimetry for Wound Measurement
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How WoundScribe replaces the wound ruler with calibrated phone imaging — and why measurement fidelity matters for healing trajectory.
The wound ruler has been the measurement standard for four decades. It is also the single largest source of variance in wound documentation. Point-n-Capture is WoundScribe's answer.
The problem with ruler-based measurement
Inter-rater variance on ruler measurements routinely exceeds 40%. A wound documented as 3.2 x 2.1 cm by one clinician may be logged as 3.8 x 2.4 cm by the next. Over four weeks, that noise obscures the fifty-percent-healing benchmark that drives care escalation and payer decisions.
What Point-n-Capture does differently
The clinician frames the wound on a standard smartphone. Depth sensors and calibrated computer vision compute length, width, surface area, and depth in under three seconds — no fiducial marker, no ruler in the frame, no manual tracing.
The imaging pipeline, agent by agent
- Capture agent — validates lighting, focus, and framing before accepting the shot.
- Segmentation agent — separates wound bed from periwound tissue.
- Planimetry agent — computes area from calibrated pixel-to-mm mapping.
- Trend agent — writes measurements into the healing analytics dashboard and flags stalled trajectories.
Why this matters for reimbursement
CMS audits and skin substitute LCDs increasingly require objective measurement evidence at each visit. A calibrated image is defensible in a way a hand-drawn ruler note is not.
How it fits the rest of the encounter
Measurement is one of six agents. The image and its computed dimensions flow directly into the SOAP note, the coding worksheet, and the patient's healing trajectory without a copy step. See the full picture on the AI-powered wound imaging page.