NSK AI
Solutions · Health and insurance
Plate V
NSK·SOL·05

Notes, labelled and redacted

Clinical text made usable without being made public.

Fig. 1 — A ward at the Elliot Community Hospital. Public domain.
Plate V
NSK·SOL·05
The problem

The note holds the finding and the identity in the same sentence. Every research request stalls on that fact.

So the notes stay unread, and the labelling that would make them useful never happens.

Grant a tier of consent.

Grant a tier of consent. The note reveals only what that tier permits.

Clinical note · extract

Patient A. O. Adeyemi, aged 54, seen at Ikoyi clinic on 11 March. Metformin increased to 1g twice daily following an HbA1c of 8.4%. Renal function stable. Review in twelve weeks; letter copied to Dr B. Okonkwo.

Fields visible 0 of 7
Consent granted
Where it applies
Three places the same consent register is used.
01
Cohort building

A research cohort assembled from notes under the consent tier that covers it, and no wider.

02
Coding and labelling

Diagnoses and procedures labelled to a schema clinicians signed, with agreement rates published.

03
Claims review

A decision with the note it rests on quoted, so the reviewer reads evidence rather than a score.

Fig. 2 — Mothers waiting at a child clinic centre in Lagos. Public domain.
A worked example
Notes processed
4.18M
Inter-annotator agreement
κ 0.91
Identifiers held in audited sample
100%
Cohort build
3 days, from 6 weeks
Successful re-identification in red team
0
Figures from one deployment, quoted with the client’s permission. Yours will differ.
Notes on compliance
01

Consent recorded per tier and per purpose, and enforced at read time.

02

Identifiers separated before any model reads the text.

03

Audit trail per field and per viewer; clinical sign-off on every label schema.

Deployment
Week 1–4
Schema agreed with clinicians, pilot double-labelled
Week 5–8
Redaction tiers implemented against the consent register
Week 9–12
Cohort queries opened to research
Ongoing
An adjudication panel reviews contested labels
The other plates

Bring us the case you have not been able to close.

We will tell you which part of it is a model problem and which part is not.