---
title: "blood_pressure"
description: "The local measurement of arterial blood pressure which is a surrogate for arterial pressure in the systemic circulation."
---

The local measurement of arterial blood pressure which is a surrogate for arterial pressure in the systemic circulation.

**Purpose.** To record the systemic arterial blood pressure of an individual.

## Source

| Model | Leg | Role |
|---|---|---|
| `openEHR-EHR-OBSERVATION.blood_pressure.v2` | openEHR | defines this table |

## Columns

| Column | Type | Null | Description | Source |
|---|---|---|---|---|
| `id` | `uuid primary key` | no | Primary key. | — |
| `form_id` | `uuid` → [`form`](/docs/tables/form) | no | The form this entry was recorded on. | — |
| `form_block_id` | `uuid` | yes | The block within the form, when the entry is bound to one. | — |
| `event_type` | `text` | yes | null represents any_event | — |
| `systolic_magnitude`<br />`systolic_units` | quantity<br />`numeric`, `text` | yes | Systolic | `/data[at0001]/events[at0006]/data[at0003]/items[at0004]` |
| `diastolic_magnitude`<br />`diastolic_units` | quantity<br />`numeric`, `text` | yes | Diastolic | `/data[at0001]/events[at0006]/data[at0003]/items[at0005]` |
| `mean_arterial_pressure_magnitude`<br />`mean_arterial_pressure_units` | quantity<br />`numeric`, `text` | yes | Mean arterial pressure | `/data[at0001]/events[at0006]/data[at0003]/items[at1006]` |
| `pulse_pressure_magnitude`<br />`pulse_pressure_units` | quantity<br />`numeric`, `text` | yes | Pulse pressure | `/data[at0001]/events[at0006]/data[at0003]/items[at1007]` |
| `clinical_interpretation`<br />`clinical_interpretation_code`<br />`clinical_interpretation_system`<br />`clinical_interpretation_valueset_id` | coded text<br />`text`, `text`, `text`, `text` | yes | Clinical interpretation | `/data[at0001]/events[at0006]/data[at0003]/items[at1059]` |
| `comment` | `text` | yes | Comment | `/data[at0001]/events[at0006]/data[at0003]/items[at0033]` |
| `position`<br />`position_code`<br />`position_system`<br />`position_valueset_id` | coded text<br />`text`, `text`, `text`, `text` | yes | Position | `/data[at0001]/events[at0006]/state[at0007]/items[at0008]` |
| `confounding_factors` | `text` | yes | Confounding factors | `/data[at0001]/events[at0006]/state[at0007]/items[at1052]` |
| `sleep_status`<br />`sleep_status_code`<br />`sleep_status_system`<br />`sleep_status_valueset_id` | coded text<br />`text`, `text`, `text`, `text` | yes | Sleep status | `/data[at0001]/events[at0006]/state[at0007]/items[at1043]` |
| `tilt_magnitude`<br />`tilt_units` | quantity<br />`numeric`, `text` | yes | Tilt | `/data[at0001]/events[at0006]/state[at0007]/items[at1005]` |
| `cuff_size`<br />`cuff_size_code`<br />`cuff_size_system`<br />`cuff_size_valueset_id` | coded text<br />`text`, `text`, `text`, `text` | yes | Cuff size | `/protocol[at0011]/items[at0013]` |
| `location_of_measurement`<br />`location_of_measurement_code`<br />`location_of_measurement_system`<br />`location_of_measurement_valueset_id` | coded text<br />`text`, `text`, `text`, `text` | yes | Location of measurement | `/protocol[at0011]/items[at0014]` |
| `method`<br />`method_code`<br />`method_system`<br />`method_valueset_id` | coded text<br />`text`, `text`, `text`, `text` | yes | Method | `/protocol[at0011]/items[at1035]` |
| `mean_arterial_pressure_formula` | `text` | yes | Mean arterial pressure formula | `/protocol[at0011]/items[at1038]` |
| `systolic_pressure_formula` | `text` | yes | Systolic pressure formula | `/protocol[at0011]/items[at1054]` |
| `diastolic_pressure_formula` | `text` | yes | Diastolic pressure formula | `/protocol[at0011]/items[at1055]` |
| `diastolic_endpoint`<br />`diastolic_endpoint_code`<br />`diastolic_endpoint_system`<br />`diastolic_endpoint_valueset_id` | coded text<br />`text`, `text`, `text`, `text` | yes | Diastolic endpoint | `/protocol[at0011]/items[at1010]` |
| `device` | `uuid` | yes | Device | `/protocol[at0011]/items[at1025]` |

## Constraints

```sql
check ((systolic_magnitude is null and systolic_units is null) or (systolic_magnitude is not null and systolic_units is not null))
check (systolic_magnitude is null or (systolic_units = 'mm[Hg]' and systolic_magnitude between 0 and 1000))
check ((diastolic_magnitude is null and diastolic_units is null) or (diastolic_magnitude is not null and diastolic_units is not null))
check (diastolic_magnitude is null or (diastolic_units = 'mm[Hg]' and diastolic_magnitude between 0 and 1000))
check ((mean_arterial_pressure_magnitude is null and mean_arterial_pressure_units is null) or (mean_arterial_pressure_magnitude is not null and mean_arterial_pressure_units is not null))
check (mean_arterial_pressure_magnitude is null or (mean_arterial_pressure_units = 'mm[Hg]' and mean_arterial_pressure_magnitude between 0 and 1000))
check ((pulse_pressure_magnitude is null and pulse_pressure_units is null) or (pulse_pressure_magnitude is not null and pulse_pressure_units is not null))
check (pulse_pressure_magnitude is null or (pulse_pressure_units = 'mm[Hg]' and pulse_pressure_magnitude between 0 and 1000))
check ((clinical_interpretation_code is null and clinical_interpretation_system is null and clinical_interpretation_valueset_id is null) or (clinical_interpretation is not null and clinical_interpretation_code is not null and clinical_interpretation_system is not null and clinical_interpretation_valueset_id is not null))
check ((position_code is null and position_system is null and position_valueset_id is null and position is null) or (position is not null and position_code is not null and position_system is not null and position_valueset_id is not null))
check ((sleep_status_code is null and sleep_status_system is null and sleep_status_valueset_id is null and sleep_status is null) or (sleep_status is not null and sleep_status_code is not null and sleep_status_system is not null and sleep_status_valueset_id is not null))
check ((tilt_magnitude is null and tilt_units is null) or (tilt_magnitude is not null and tilt_units is not null))
check (tilt_magnitude is null or (tilt_units = 'deg' and tilt_magnitude between -90 and 90))
check ((cuff_size_code is null and cuff_size_system is null and cuff_size_valueset_id is null and cuff_size is null) or (cuff_size is not null and cuff_size_code is not null and cuff_size_system is not null and cuff_size_valueset_id is not null))
check ((location_of_measurement_code is null and location_of_measurement_system is null and location_of_measurement_valueset_id is null) or (location_of_measurement is not null and location_of_measurement_code is not null and location_of_measurement_system is not null and location_of_measurement_valueset_id is not null))
check ((method_code is null and method_system is null and method_valueset_id is null and method is null) or (method is not null and method_code is not null and method_system is not null and method_valueset_id is not null))
check ((diastolic_endpoint_code is null and diastolic_endpoint_system is null and diastolic_endpoint_valueset_id is null and diastolic_endpoint is null) or (diastolic_endpoint is not null and diastolic_endpoint_code is not null and diastolic_endpoint_system is not null and diastolic_endpoint_valueset_id is not null))
```

## Unique

- `form_block_id`

## References

| Columns | Target | On delete |
|---|---|---|
| `form_id` | [`form`](/docs/tables/form) | cascade |
| `form_id, form_block_id` | [`form_block`](/docs/tables/form_block) | cascade |
| `clinical_interpretation_valueset_id, clinical_interpretation_code, clinical_interpretation_system, clinical_interpretation` | [`valueset_code`](/docs/tables/valueset_code) | restrict |
| `position_valueset_id, position_code, position_system, position` | [`valueset_code`](/docs/tables/valueset_code) | restrict |
| `sleep_status_valueset_id, sleep_status_code, sleep_status_system, sleep_status` | [`valueset_code`](/docs/tables/valueset_code) | restrict |
| `cuff_size_valueset_id, cuff_size_code, cuff_size_system, cuff_size` | [`valueset_code`](/docs/tables/valueset_code) | restrict |
| `location_of_measurement_valueset_id, location_of_measurement_code, location_of_measurement_system, location_of_measurement` | [`valueset_code`](/docs/tables/valueset_code) | restrict |
| `method_valueset_id, method_code, method_system, method` | [`valueset_code`](/docs/tables/valueset_code) | restrict |
| `diastolic_endpoint_valueset_id, diastolic_endpoint_code, diastolic_endpoint_system, diastolic_endpoint` | [`valueset_code`](/docs/tables/valueset_code) | restrict |
| `device` | [`device`](/docs/tables/device) | no action |

## Referenced by

- [`blood_pressure_structured_measurement_location`](/docs/tables/blood_pressure_structured_measurement_location) via `blood_pressure_id`

## Indexes

- `blood_pressure_form_id_idx` on `form_id`
- `blood_pressure_device_idx` on `device`

## Child tables

1 table hang off `blood_pressure`, one row per repetition.

### `blood_pressure_structured_measurement_location`

Child table — one row per repetition, deleted with its parent.

| Column | Type | Null | Description | Source |
|---|---|---|---|---|
| `id` | `uuid primary key` | no | Primary key. | — |
| `blood_pressure_id` | `uuid` → [`blood_pressure`](/docs/tables/blood_pressure) | no | — | — |
| `position` | `integer` | no | Order of this row within its parent, from zero. | — |
| `anatomical_location_id` | `uuid` | no | Structured measurement location | `/protocol[at0011]/items[at1057]` |

#### Unique

- `blood_pressure_id, position`
- `blood_pressure_id, anatomical_location_id`

#### References

| Columns | Target | On delete |
|---|---|---|
| `blood_pressure_id` | [`blood_pressure`](/docs/tables/blood_pressure) | cascade |
| `anatomical_location_id` | [`anatomical_location`](/docs/tables/anatomical_location) | no action |

#### Indexes

- `blood_pressure_structured_measurement_location_anatomica_253b08` on `anatomical_location_id`

## Value sets

| Value set | Codes |
|---|---|
| `org.openehr::openEHR-EHR-OBSERVATION.blood_pressure.v2/cuff_size` | 7 |
| `org.openehr::openEHR-EHR-OBSERVATION.blood_pressure.v2/diastolic_endpoint` | 2 |
| `org.openehr::openEHR-EHR-OBSERVATION.blood_pressure.v2/location_of_measurement` | 12 |
| `org.openehr::openEHR-EHR-OBSERVATION.blood_pressure.v2/method` | 4 |
| `org.openehr::openEHR-EHR-OBSERVATION.blood_pressure.v2/position` | 5 |
| `org.openehr::openEHR-EHR-OBSERVATION.blood_pressure.v2/sleep_status` | 2 |