HAI Compass
App documentation — last updated August 18, 2026
HAI Compass is a companion app for people living with an implanted
hepatic artery infusion (HAI) pump, such as the Intera 3000. The pump
delivers chemotherapy directly to the liver, and it has no onboard
display or alarm — between clinic visits, patients have no built-in way
to know how their treatment is going. HAI Compass closes that gap.
What the app does
- Refill countdown. HAI pumps are refilled on a strict
14-day schedule. The app tracks the next refill date and reminds the
patient as it approaches, with escalating reminders if the date is
close or missed.
- Symptom tracking. A daily check-in tuned to HAI
therapy. Symptoms that may need prompt attention are flagged with
clear guidance to contact the care team.
- Lab tracking. Patients can record their liver
function tests (AST, ALT, ALP, bilirubin) and other labs they choose
to follow, and see trends between visits.
- Health record connection. Patients can optionally
link their patient portal (MyChart) account so recent lab results and
imaging history appear in the app automatically — described in detail
below.
- Travel mode. Altitude and temperature affect pump
flow rate. Travel mode provides a pre-travel checklist and tracks
altitude during trips.
- Education. Plain-language chapters about HAI
therapy, the pump, and living with it, written for patients at
multiple reading levels.
- Device ID card. An in-app version of the pump
identification card, including MRI-conditional status information.
- Companion access. Patients can invite a family
member or caregiver to view their information, with the patient in
control of the access level.
A separate, clinician-gated section of the app provides dosing
reference tools for healthcare professionals who manage HAI therapy.
Those tools sit behind a professional attestation and are never shown
to patients.
The health record connection
Linking a patient portal account is optional. Nothing in the app
requires it — patients can always enter information themselves. When a
patient chooses to connect:
- The patient signs in through their own health system's MyChart
login page. HAI Compass never sees or stores the portal password.
- The connection uses SMART on FHIR, the same standards-based,
patient-authorized access defined by the 21st Century Cures Act.
- Access is read-only. The app cannot change
anything in the patient's chart.
- The patient can disconnect at any time from inside the app, and
can also revoke access from their patient portal.
What the app requests
- Basic patient information — the patient's name,
shown once to confirm the right account was linked.
- Lab results — recent laboratory values, including
the liver panel central to HAI care.
- Imaging history — the name, date, and status of
recent imaging studies. The app does not fetch report narratives.
- Medications, procedures, implanted devices, and
appointments — display-only treatment history planned for a
future update, shown on the patient's timeline.
How connected data is handled
Lab values the patient chooses to import join their own
longitudinal record in the app, stored in the same secure cloud
database as labs the patient enters by hand (HIPAA-eligible
infrastructure covered by a signed Business Associate Agreement, in
pseudonymous, patient-scoped storage). All other chart data stays on
the patient's device in an encrypted cache and is never sent to our
servers. Chart data is never used for advertising or analytics, and
it is deleted when the patient unlinks or deletes their account.
What HAI Compass is not
HAI Compass is an informational tool. It does not diagnose, treat,
or make clinical recommendations, and it is not a substitute for the
care team's guidance. Lab values and chart data are displayed without
interpretation. When a symptom may need attention, the app says so and
directs the patient to their pump clinic — decisions are always made by
the patient's clinicians.
For clinicians and health systems
HAI Compass is a patient-facing application using standards-based
patient access:
- SMART on FHIR R4, standalone patient launch, authorization code
flow with PKCE (public client, no client secret).
- Read-only FHIR resources: Patient, Observation (labs),
DiagnosticReport (results), MedicationRequest, Procedure, Device,
and Appointment.
- Tokens are stored in the device keychain. The PKCE verifier is
held in memory only.
- The app writes nothing to the chart.
If you are a health system considering enabling HAI Compass for
your patients, or a clinician whose patient uses the app, we are glad
to answer questions — contact details below.
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