---
title: "mallampati_classification"
description: "A classification that relates to the degree of visibility in the oral cavity and pharynx to assess the difficulty of oral intubation by direct laryngoscopy."
---

A classification that relates to the degree of visibility in the oral cavity and pharynx to assess the difficulty of oral intubation by direct laryngoscopy.

**Purpose.** To be used as a part of the assesment level of intubation difficulty before a planned anesthesia.

## Source

| Model | Leg | Role |
|---|---|---|
| `openEHR-EHR-OBSERVATION.mallampati_classification.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. | — |
| `mallampati_classification`<br />`mallampati_classification_code`<br />`mallampati_classification_system`<br />`mallampati_classification_numeric`<br />`mallampati_classification_valueset_id` | coded text<br />`text`, `text`, `text`, `numeric`, `text` | yes | Mallampati classification | `/data[at0001]/events[at0002]/data[at0003]/items[at0004]` |
| `comment` | `text` | yes | Comment | `/data[at0001]/events[at0002]/data[at0003]/items[at0005]` |

## Constraints

```sql
check ((mallampati_classification_code is null and mallampati_classification_system is null and mallampati_classification_numeric is null and mallampati_classification is null) or (mallampati_classification_valueset_id is not null and mallampati_classification_code is not null and mallampati_classification_system is not null and mallampati_classification_numeric is not null and mallampati_classification 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 |
| `mallampati_classification_valueset_id, mallampati_classification_code, mallampati_classification_system, mallampati_classification, mallampati_classification_numeric` | [`valueset_code`](/docs/tables/valueset_code) | restrict |

## Indexes

- `mallampati_classification_form_id_idx` on `form_id`

## Value sets

| Value set | Codes |
|---|---|
| `org.openehr::openEHR-EHR-OBSERVATION.mallampati_classification.v1/mallampati_classification` | 4 |