NJR data collection forms
(MDSv8)

Data from surgical procedures should be entered directly into the NJR data entry system. Where this is not feasible, data collection forms can be used by hospital staff to record data, prior to later electronic submission.

The set of data fields collected by the NJR is known as the Minimum Data Set (MDS). The majority of MDS data fields relate to the patient’s operation details and are collected in the operating theatre. We updated our data set collection in June this year, it is now version 8 (MDSv8). You can find out more about the changes we have introduced to develop our data collection and some useful FAQs here.

• MDSv8 forms can be used for capturing procedures performed before and after 12 June 2023

An important subset of data fields in the MDS are the patient’s personal details (surname, forename, date of birth, home postcode and NHS number or national patient identifier). Patients must give their consent for this data to be recorded on the registry.

The MDS is periodically reviewed to ensure that it takes account of clinical developments and continues to meet the aims of the NJR in monitoring surgical performance. The Data Entry System (the electronic system for collection and transfer of data) and the MDS proformas (paper forms for recording NJR data prior to electronic submission) are reviewed in line with approved modifications to the dataset.

Previous iterations of NJR MDS forms are available on request by contacting the NJR Service Desk.

Minimum Data Set forms (MDSv8)

NJR data entry form – joint selection and usage:

Joint	Form	Procedures
Hip	H1	Primary Hip Used for all Primary Hip operations
	H2	Single stage revision (includes DAIR with modular exchange and modular exchange for indications other than infection) Stage 1 of 2-stage revision Stage 2 of 2-stage revision Excision arthroplasty Insertion of PLAD/stabiliser
Knee	K1	Primary Knee Used for all Primary Knee operations
	K2	Single stage revision (includes DAIR with modular exchange and modular exchange for indications other than infection) Stage 1 of 2-stage revision Stage 2 of 2-stage revision Stage 2 of planned incomplete primary procedure Conversion to arthrodesis Amputation Secondary resurfacing of patella Secondary/subsequent partial replacement (Unicompartmental or PFJR)
Ankle	A1	Primary Ankle Used for all Primary Ankle operations
	A2	Single stage revision (includes DAIR with modular exchange and modular exchange for indications other than infection) Stage 1 of 2-stage revision Stage 2 of 2-stage revision Conversion to arthrodesis Amputation
Elbow	E1	Primary Elbow Used for all Primary Elbow operations
	E2	Single stage revision (includes DAIR with modular exchange and modular exchange for indications other than infection) Stage 1 of 2-stage revision Stage 2 of 2-stage revision Conversion to arthrodesis Partial excision arthroplasty (i.e. removal of radial head prosthesis) Excision arthroplasty Amputation
Shoulder	S1	Primary Shoulder. Used for all Primary Shoulder operations.
	S2	Single stage revision (includes DAIR with modular exchange and modular exchange for indications other than infection) Stage 1 of 2-stage revision Stage 2 of 2-stage revision Stage 2 of planned incomplete primary procedure Conversion to arthrodesis Excision arthroplasty Amputation

NJR data entry form – reoperations other than a revision:

Reoperations other than revision

RO

Closed/open reduction of dislocation Fixation of periprosthetic fracture Superficial/deep Debridement And Implant Retention (DAIR) Washout of haematoma Joint Manipulation Under Anaesthesia (MUA e.g. stiff knee) Soft tissue repair/procedure (e.g. ligament/capsule/tendon) Excision of heterotopic bone Excision of excess cement