IHE PDQ Patient Demographic Query

IHE profile for patient demographic queries.

Definition

Actors: Patient Demographics Consumer, Patient Demographics Supplier. Transaction ITI-21 PDQ Query (HL7 v2 QBP^Q22 → RSP^K22). Evolutions PDQv3 (SOAP/WS), PDQm (FHIR R4 Patient search). Often deployed alongside PIX to provide a demographic search layer not tied to identifiers.

Origin

IHE ITI Technical Committee, PDQ published 2003.

Usage

Patient search from EHR, RIS, mobile patient app. PDQm often used as modern replacement via FHIR Patient.search.

Related terms

• IHE PIX — profil jumeau cross-référencement.
• FHIR Patient — évolution moderne.
• HL7 v2 — transport historique.