Facialis Palsy File Models

Introduction

There exist some Grading Systems for Facial Palsy. These Gradings are mostly saved in own developed File Formats. This Repository trys to define a standardised file format for the most common grading systems.

File Format

The File Format is based on the JSON Format. This library implements a pydantic base model for the JSON Format definition and parsing.

Models

Sunnybrook

The Sunnybrook Grading System is defined in the Sunnybrook Facial Grading System: Reliability and Criteria for Nasolabial Fold Paper.

The Model is defined in the facialis_palsy.models.sunnybrook Module.

House Brackmann

The Sunnybrook Grading System is defined in:

House, J.W., Brackmann, D.E. Facial nerve grading system. Otolaryngol. Head Neck Surg, [93] 146–147. 1985.

The Model is defined in the facialis_palsy.models.house_brackmann Module.

Grade I - Normal

Normal facial function in all areas

Grade II - Slight Dysfunction

Gross: slight weakness noticeable on close inspection; may have very slight synkinesis At rest: normal symmetry and tone Motion: forehead - moderate to good function; eye - complete closure with minimum effort; mouth - slight asymmetry.

Grade III - Moderate Dysfunction

Gross: obvious but not disfiguring difference between two sides; noticeable but not severe synkinesis, contracture, and/or hemi-facial spasm. At rest: normal symmetry and tone Motion: forehead - slight to moderate movement; eye - complete closure with effort; mouth - slightly weak with maximum effort.

Grade IV - Moderate Severe Dysfunction

Gross: obvious weakness and/or disfiguring asymmetry At rest: normal symmetry and tone Motion: forehead - none; eye - incomplete closure; mouth - asymmetric with maximum effort.

Grade V - Severe Dysfunction

Gross: only barely perceptible motion At rest: asymmetry Motion: forehead - none; eye - incomplete closure; mouth - slight movement

Grade VI - Total Paralysis

No movement

Description of House Brackmann Grading Scale

Yanagihara

The Yanagihara Grading System is defined in the Yanagihara Grading System for Facial Palsy Paper.

The Model is defined in the facialis_palsy.models.yanagihara Module.

eFACE

The eFACE Grading System is defined in the eFACE: A New Clinical Tool to Evaluate Facial Function Paper.

The Model is defined in the facialis_palsy.models.eface Module.

Additional Metadata

We define some additional Metadata for the File Format.

metadata_version_number: "0.0.0"
application_version: str = "APPLICATION_VERSION"
application_org: str = "ORGANIZATION_DOMAIN"

The metadata_version_number gets updated via python change_version_number.py script. This script updates the version number in all files accordingly to the setup.py.

The application_version and application_org are specific to the application which uses this library and writes the files.