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What this system collects

Every clinical concept the repository records, with the SNOMED CT code that gives it meaning outside this installation, the measurements taken under it, and the coded answers each one accepts. Concepts without a SNOMED code are local to this installation and mean what the description says.

Computed tomography of heart

OH_P_1 Procedure

SNOMED CT 241547009 — Cardiac CT

Using device Reference
SNOMED
424226004
— Using device
Has intent SNOMED concept
SNOMED
363703001
— Has intent
Actor primarily responsible for procedure Reference

Obtaining consent

OH_P_2 Procedure

SNOMED CT 414925007 — Obtaining consent

Actor primarily responsible for procedure Reference

Digital slit-beam radiograph

OH_P_3 Procedure

SNOMED CT 241597008 — Digital slit-beam radiograph

Recorded as an event — no measured values are collected under this concept.

Cardiac CT for calcium scoring

OH_P_4 Procedure

SNOMED CT 426005005 — Cardiac computed tomography for calcium scoring

Recorded as an event — no measured values are collected under this concept.

CT of heart with contrast

OH_P_5 Procedure

SNOMED CT 764579002 — CT of heart with contrast

Recorded as an event — no measured values are collected under this concept.

Percutaneous transluminal cannulation of vein

OH_P_6 Procedure

SNOMED CT 175872000 — Percutaneous transluminal cannulation of vein

Actor primarily responsible for procedure Reference

Administration via intravenous route (contrast)

OH_P_7 Procedure

SNOMED CT 386358000 — Medication administration: intravenous

Direct substance SNOMED concept
SNOMED
363701004
— Direct substance
Contrast agents (iodinated) — 5 allowed values
  • 395753004 — Iomeprol (substance)
  • 395751002 — Iohexol (substance)
  • 395750001 — Iodixanol (substance)
  • 395756007 — Iopromide (substance)
  • 704384003 — Iobitridol (substance)

Administration via oral route (metoprolol)

OH_P_8 Procedure

SNOMED CT 386359008 — Administration of drug or medicament via oral route

Direct substance SNOMED concept
SNOMED
363701004
— Direct substance
Oral rate control drugs — 2 allowed values
  • 409226009 — Metoprolol tartrate 25 mg oral tablet (product)
  • 72770009 — Metoprolol tartrate (substance)

Administration via oral route (alprazolam)

OH_P_9 Procedure

SNOMED CT 386359008 — Administration of drug or medicament via oral route

Direct substance SNOMED concept
SNOMED
363701004
— Direct substance
Oral benzodiazepines — 2 allowed values
  • 321241004 — Alprazolam 250 microgram oral tablet (product)
  • 321242006 — Alprazolam 500 microgram oral tablet (product)

Administration via sublingual route

OH_P_10 Procedure

SNOMED CT 433066006 — Administration of substance via sublingual route

Direct substance SNOMED concept
SNOMED
363701004
— Direct substance
Sublingual nitrates — 1 allowed value
  • 425176000 — Glyceryl trinitrate 400 microgram/actuation sublingual spray (product)

Administration of prophylactic drug for allergy

OH_P_11 Procedure

SNOMED CT 1373565000 — Administration of prophylactic drug or medicament for allergy

Direct substance SNOMED concept
SNOMED
363701004
— Direct substance
Anti-allergy drugs — 1 allowed value
  • 781803000 — Chlorpromazine hydrochloride 25 mg/mL solution for injection (product)

Measurement of blood pressure using cuff method

OH_P_12 Procedure

SNOMED CT 371911009 — Measurement of blood pressure using cuff method

Recorded as an event — no measured values are collected under this concept.

Administration via intravenous route (metoprolol)

OH_P_13 Procedure

SNOMED CT 386358000 — Medication administration: intravenous

Source: April 2026 codebook, mapped into May structure.

Direct substance SNOMED concept
SNOMED
363701004
— Direct substance
IV rate control drugs — 1 allowed value
  • 895721002 — Metoprolol tartrate 1 mg/mL solution for injection (product)

X-ray Tube Voltage

OH_O_1 Observable Entity

Local concept — no SNOMED CT code.

X-ray tube voltage. Device-specific acquisition parameter. No SNOMED CT concept — Open-Heart local concept OH_O_1.

Value Numeric in kV (kilovolt)
Plausible range
60 – 140

X-ray Tube Current

OH_O_2 Observable Entity

Local concept — no SNOMED CT code.

X-ray tube current. Device-specific parameter. No SNOMED CT concept — OH_O_2.

Value Numeric in mA (milliampere)
Plausible range
50 – 500