---
title: "capillary_refill"
description: "Measurement of the time taken for color to return to an external capillary bed after pressure is applied to cause blanching."
---

Measurement of the time taken for color to return to an external capillary bed after pressure is applied to cause blanching.

**Purpose.** To record findings related to the capillary refill time.

## Source

| Model | Leg | Role |
|---|---|---|
| `openEHR-EHR-OBSERVATION.capillary_refill.v1` | 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. | — |
| `refill_time_magnitude`<br />`refill_time_units` | quantity<br />`numeric`, `text` | yes | Refill time | `/data[at0001]/events[at0002]/data[at0003]/items[at0009]` |
| `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[at0002]/data[at0003]/items[at0005]` |
| `comment` | `text` | yes | Comment | `/data[at0001]/events[at0002]/data[at0003]/items[at0040]` |
| `confounding_factors` | `text` | yes | Confounding factors | `/data[at0001]/events[at0002]/state[at0021]/items[at0023]` |
| `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[at0019]/items[at0024]` |
| `structured_measurement_location_anatomical_location` | `uuid` | yes | — | — |
| `structured_measurement_location_anatomical_location_relative` | `uuid` | yes | — | — |
| `measurement_method` | `text` | yes | Measurement method | `/protocol[at0019]/items[at0041]` |
| `device` | `uuid` | yes | Device | `/protocol[at0019]/items[at0037]` |

## Constraints

```sql
check ((refill_time_magnitude is null and refill_time_units is null) or (refill_time_magnitude is not null and refill_time_units is not null))
check (refill_time_magnitude is null or (refill_time_units = 's' and refill_time_magnitude between 0 and 20))
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 ((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 (num_nonnulls(structured_measurement_location_anatomical_location, structured_measurement_location_anatomical_location_relative) <= 1)
```

## 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 |
| `location_of_measurement_valueset_id, location_of_measurement_code, location_of_measurement_system, location_of_measurement` | [`valueset_code`](/docs/tables/valueset_code) | restrict |
| `structured_measurement_location_anatomical_location` | [`anatomical_location`](/docs/tables/anatomical_location) | no action |
| `structured_measurement_location_anatomical_location_relative` | [`anatomical_location_relative`](/docs/tables/anatomical_location_relative) | no action |
| `device` | [`device`](/docs/tables/device) | no action |

## Indexes

- `capillary_refill_form_id_idx` on `form_id`
- `capillary_refill_structured_measurement_location_anatomi_832616` on `structured_measurement_location_anatomical_location`
- `capillary_refill_structured_measurement_location_anatomi_15f439` on `structured_measurement_location_anatomical_location_relative`
- `capillary_refill_device_idx` on `device`

## Value sets

| Value set | Codes |
|---|---|
| `org.openehr::openEHR-EHR-OBSERVATION.capillary_refill.v1/clinical_interpretation` | 3 |

