Pezi Labs

Use case 001Household applications

Trace

A private health record that keeps the whole story of a long-term condition in one place.

The need

Someone in my family manages a long-term condition. Their health story was scattered. Documents sat in patient portals. Medication changes lived on pill bottles and in memory. Symptoms were barely written down at all.

Then, in a short appointment, the doctor would ask why a medication had been stopped, and nobody could remember. A symptom means little without knowing what was being taken at the time, and that’s exactly the detail memory loses first.

What I built

A health record kept by the person it’s about, built around one idea: nothing is recorded alone. Every medication change carries its reason. Every symptom note is stamped with what was being taken at that moment. Documents link to the events they describe.

Adding to it happens in plain words, not forms. Questions get answered from the record itself, privately, without handing a health history to an outside AI company. It doesn’t diagnose anything. It makes sure the history comes to the appointment.

Fig. 1  Record modelSchematic · 12 weeks · not real data
Diagram: a medication timeline with notes and documents anchored to it Three medications run as bars across twelve weeks. Each start, stop or dose change carries a marker with its reason. Three symptom notes drop dotted lines onto whichever medications were active at that moment. One document links to the medication change it describes. Symptom notesstamped Medication Awith reasons Medication B Medication C Documentslinked W01W02W03W04W05W06W07W08W09W10W11W12 Week taking A + C taking A + B taking B Visit summary StoppedReason: side effects StartedReason: replaces C Dose loweredReason: advice StoppedReason: finished Diagram: a medication timeline with notes and documents anchored to it Time runs downward over twelve weeks. Three medications, A, B and C, run as vertical bars. Numbered markers show each change and its reason. Three symptom notes connect to whichever medications were active. One document links to the change it describes. ABCDocNotes W01W02W03W04W05W06W07W08W09W10W11W12 A + C A + B B 1 2 3 4
  1. 1C stopped. Reason: side effects
  2. 2B started. Reason: replaces C
  3. 3A dose lowered. Reason: advice
  4. 4A stopped. Reason: finished
Change
Every medication change carries its reason.
Symptom note
Every symptom note is stamped with what was being taken at that moment.
Document
Documents link to the events they describe.
Fig. 1Nothing is recorded alone. A schematic of the record model, drawn with placeholder medications. Screenshots on fixture data will sit in this same plate.

What changed

It works, and it’s in real use today. Then people who saw it started asking whether it would work for their condition too. That question is why it’s becoming a product, called Trace. Trace is in research now: I’m talking with people who manage long-term conditions before building the version meant for them.

→Contact

Want to see it running? I'll show you.

Get in touch tom@pezilabs.com