Allergy

Introduction

The Allergy data model is crucial in healthcare systems for capturing and managing information related to patient allergies. It provides healthcare providers with essential data to ensure patient safety, avoid allergic reactions, and make informed clinical decisions. This model plays a vital role in enhancing the quality of care and minimising the risks associated with allergies.

Use Case

Developers can leverage the Allergy data model to address various technical and clinical challenges in healthcare. Here are some developer-centric use cases:

Allergy Alert Systems: Develop alert systems that utilise allergy data to warn healthcare providers about potential allergens when prescribing medications or treatments. These alerts can prevent adverse reactions.
Clinical Decision Support: Create clinical decision support tools that assist healthcare professionals in selecting appropriate treatments and interventions considering the patient's allergies.
Patient Allergy Profiles: Develop applications that compile comprehensive allergy profiles for patients, allowing providers to quickly review and manage a patient's allergies across different visits and encounters.
Data Validation: Implement data validation mechanisms to ensure the accuracy and consistency of allergy data, reducing errors and improving patient safety.
Allergy Data Analytics: Create analytics tools for identifying trends in allergy data within patient populations, helping healthcare organisations improve allergy management and preventive care.
Patient Engagement: Develop patient-facing applications that provide patients with easy access to their allergy data and education about managing their allergies.
Medication Allergy Cross-Checking: Integrate allergy data with medication records to cross-check prescribed medications for allergen conflicts, enhancing patient safety.
Allergy Testing Management: Build systems for managing and tracking allergy testing, including scheduling, test results, and patient follow-ups.
Emergency Response: Create applications and systems that provide allergy information to emergency responders, ensuring they are aware of critical allergies in case of emergencies.
Quality Assurance: Implement quality assurance processes for allergy data, including auditing and reporting to ensure data accuracy and compliance with clinical guidelines.
Patient Allergy History: Enable healthcare providers to access a patient's complete allergy history, helping them make informed decisions and provide appropriate care.
Reporting and Compliance: Develop reporting tools that enable healthcare organizations to monitor and report on allergy data for compliance with regulatory requirements.

Data Fields

Attribute Name	Description	HL7 Mapping	Data Type	Label	Use Case
batch_id	Batch id	System Generated	string	Batch ID	"batch ID" is a unique identifier assigned to a group of messages that are logically grouped together for processing or transmission. Batching messages is a common practice in healthcare systems to efficiently manage and transmit multiple messages as a single unit
patient_id	Id of the patient	PID-3-1	string	Patient ID	The patient ID is a unique identifier assigned to a patient within the healthcare system. It is used to accurately identify and link a patient's medical records, treatments, and history.
allergen_description	Description of Allergy	AL1-3	string	Allergen Description	This field contains the text description of the allergen. Healthcare providers and clinicians need to know the exact allergen to prevent exposure to it, as exposure can lead to allergic reactions, which can range from mild to severe.
allergen_code	Code of Allergy	AL1-3	string	Allergen Code	This field contains a code that uniquely identifies the specific allergen, which can be linked to a standardised coding system for allergies, such as LOINC. It serves the role of conveying information about a patient's allergies.
allergy_reaction_code	Reaction Code of Allergy	AL1-5	string	Allergy Reaction Code	This field contains a code or value that represents the type of allergic reaction the patient experiences when exposed to the allergen. It helps healthcare providers and clinical staff avoid exposure to allergens that could trigger adverse reactions.
allergy_severity_code	Severity Code of Allergy	AL1-4	string	Allergy Severity Code	This field contains a code or value that represents the severity of the allergic reaction the patient experiences when exposed to the allergen. The severity of an allergic reaction informs treatment decisions. For instance, a mild allergic reaction may only require symptomatic relief, while a severe reaction, such as anaphylaxis, demands immediate and intensive interventions.
visit_number	Id of the visit	PV1-19-1	string	Visit Number	The visit number serves as a unique identifier for a specific patient visit or encounter within a healthcare facility. It distinguishes one visit from another.
bundle_id	ID of bundle	MSH-10	string	Bundle ID	“bundle ID" typically refers to a unique identifier assigned to a group or bundle of related messages or data elements. This identifier is used to associate multiple messages or pieces of information that are related to a specific patient, event, or transaction.
lineage	This is lineage attribute	Fixed - HL7	string	Lineage	"lineage" refers to the information about the origin or source of a message. It helps trace the path of the message, indicating where it originated, how it was transmitted, and any intermediate systems or components it passed through before reaching its destination.
allergen_type_code	Type Code of Allergy	AL1-3	string	Allergen Type Code	This field contains a code or value that represents the category or type of allergen. This is crucial for understanding potential sources of allergic reactions.
alternate_visit_id	Alternative visit id	PV1-50/PID-18	string	Alternate Visit Id	This field provides an alternate identifier for a patient's visit. It is used for tracking and cross-referencing patient visits and records, especially in scenarios requiring multiple identifiers or references. This field is recorded during patient registration and aids in accurate record linkage.
encounter_id	This is encounter_id attribute	PV1+MSH-10	string	Encounter ID	This unique identifier is used to associate various HL7 messages with a specific patient encounter or visit. It ensures that data and events are accurately linked to the correct patient's healthcare journey.
xc_visit_id	XC visit id	Based on alternate_visit_id followed by visit_number followed by system generated ID	string	XC visit id	The "xc_visit_id" is a unique identifier used to group together all the interactions, procedures, tests, and check-ups associated with a single patient visit in a healthcare setting. This identifier helps in organising and managing various activities and data related to that specific patient encounter.
identification_date	Date of Identification of Allergy	AL1-6	date	Identification Date	The identification date helps healthcare providers and clinicians understand the timeline of when the patient's allergy or intolerance was first recognised. This information is crucial for assessing the duration of the allergy and its relevance to the patient's current health status.
allergy_id	Id of document	AL1+MSH-10	string	Allergy ID	This field provides a unique identifier for the allergy or intolerance within the segment.

HL7 v2 Data Catalog

Diagnosis