The Paper Consent Problem
If you run orthopedic clinical research, you have lived this:
A patient signs a consent form at the pre-op visit. The form goes into a folder. The folder goes into a filing cabinet. Six months later, when the IRB auditor asks to see it, nobody can find it.
Or worse: the consent template was updated to version 3 last month, but the clinic is still printing version 2. Half your cohort signed the wrong version.
Or worst: a patient called to withdraw consent. Someone wrote it on a sticky note. The sticky note is gone.
These are not edge cases. In our conversations with teaching hospitals, roughly 10-15% of paper consent forms encounter some filing or versioning issue before the study concludes.
Two Versions, One Platform
iRehab v2.1 ships with a dual-version e-consent platform designed for two distinct use cases:
Hospital Version (IRB Research) — Full research disclosure: study purpose, risks, benefits, data usage scope, withdrawal rights. Meets GCP requirements. Designed for teaching hospitals running IRB-approved studies.
Personal Version (QI) — Streamlined consent for individual practice quality improvement tracking. No IRB overhead. Designed for private clinics tracking post-surgical outcomes for their own clinical improvement.
The doctor configures which version to use once. Every new patient automatically sees the correct consent form.
Patient Flow: Dashboard-First Interstitial
On first login (or when the doctor creates a new care episode), the Patient PWA displays a full-screen consent interstitial before showing the dashboard. The patient must choose "Agree" or "Decline" — there is no "maybe later" option.
This design pattern, which we call dashboard-first interstitial, ensures zero patients accidentally skip consent. It is the digital equivalent of "you must sign before we proceed," except it cannot be lost, misfiled, or accidentally shredded.
Doctor Flow: Four-Color Consent Badges
In the Doctor PWA patient list, every patient shows a consent status badge:
- Green — Consented. Safe to include in research analysis.
- Yellow — Pending. Patient has not yet opened the consent form.
- Red — Declined. Not included in research; clinical care continues normally.
- Gray — Withdrawn. Previously consented, then revoked. Research data collection stops.
No more digging through filing cabinets. One screen, full visibility.
Withdrawal: The Patient's Right, The System's Job
GCP (Good Clinical Practice) is unambiguous: participants may withdraw consent at any time without affecting their clinical care.
In iRehab, patients tap the consent status card on their home screen to withdraw. The system then:
- Stops research-related PROM scheduling
- Preserves already-collected data (per GCP requirements)
- Keeps all clinical features (exercises, pain reports, wound photos) fully functional
- Updates the doctor-side badge from green to gray automatically
The entire consent lifecycle is recorded as an append-only event log. Every consent, decline, and withdrawal generates a ConsentEvent with a timestamp. Nothing is overwritten. Nothing is deleted.
Tamper-Proof: SHA-256 Hashing
At the moment of signing, the system computes a SHA-256 hash covering: template version, timestamp, patient ID, and consent status.
If anyone — including platform administrators — attempts to alter a consent record after the fact, the hash will not match. The discrepancy is immediately detectable during audit.
This is not blockchain. We believe blockchain is over-engineered for this use case. SHA-256 hashing plus append-only event logging provides sufficient audit integrity for clinical research, without the complexity or cost.
White-Label Theming: Trust Drives Consent Rates
Here is a question that rarely appears in e-consent specs: when the patient sees the consent form, who do they trust?
If the app looks like it belongs to some tech company they have never heard of, hesitation is natural. But if the app carries the colors and identity of the hospital where they are receiving care, the trust barrier drops significantly.
iRehab's white-label theming system lets each hospital configure its own brand colors. Both the Doctor PWA and Patient PWA reflect the hospital's identity — from the moment the patient scans the QR code to the moment they sign consent.
Matching the hospital's color palette gives patients a sense of familiarity the first time they open the app. It also extends the patient's sense of belonging from inside the hospital to their home. iRehab's "family first" ethos and the hospital's own brand reinforce each other — what patients see is not an unfamiliar tech product, but a natural extension of the care team they already trust.
Currently live themes include hospitals in central and northern Taiwan, with more joining.
Integration with IRB Applications
If you are preparing an IRB application, iRehab provides a comprehensive Data Security Statement for Research that you can cite or attach to the "Data Security" section of your application.
It covers:
- 11 data types collected (including 19 validated PROM instruments)
- Storage and encryption (Firestore, TLS 1.3, AES-256)
- Access control (IDOR Guard, JWT scope)
- Export and de-identification
- AI tool access boundaries
19 PROM Instruments: Research-Grade Data From Day One
E-consent is not an isolated feature — it is the starting gate for research data collection. Once a patient consents, the system automatically schedules PROM questionnaires matched to their procedure:
- Joint generation: KOOS JR, HOOS JR, WOMAC, Oxford Knee/Hip Score, PROMIS Global-10, EQ-5D-5L
- Hip fracture generation: Parker Mobility Score
- Spine generation: ODI, NDI, Macnab, VAS Back/Leg split
- Shoulder generation: UCLA Shoulder Score, Constant-Murley (patient portion), QuickDASH
From pre-op baseline through one-year follow-up, data collection is automatic, scoring is automatic, and overdue tracking is automatic. Researchers export JSON at the end. No manual survey distribution, no chasing patients to fill forms.
From Paper to Digital — Not a Tech Demo
The value of e-consent is not "going digital" for its own sake. It is:
- No lost forms — Cloud-stored, encrypted, backed up
- Always the right version — System only serves the latest template
- Withdrawal on record — Append-only event log, audit-ready
- Brand consistency — White-label theming makes the app feel like the hospital's own
- Seamless research pipeline — Sign consent, PROM collection starts automatically
If you are planning orthopedic clinical research and want to see how iRehab fits your workflow, contact us.