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National Register of Joint Replacement (NRKN)


The purpose of detection of requested data is registration of data on patients treated by means of operation using endoprosthesis and of specific information describing this therapy more precisely (e.g. type, size, specification of the surface of the endoprosthesis, use of cement, presence of complications).

National Register of Joint Replacement (further only NRKN) provides aggregated data for statistical surveys on the national level as well as for international comparison, for epidemiological studies and for medical research. It also provides information on the materials of the used replacements, particularly from the view point of their lifetime and also of the costs of these materials.

Comprehensive data are the basis for design, realisation and evaluation of preventive health care programmes and for estimates of necessary financial costs of securing complex orthopedic care. Anonymised data may be provided for epidemiological studies and health related research.


Since the end of 2003, NRKN is operated as a web application with central database. Health service workplaces commissioned by NRKN insert data to the register by means of internet connection via secure https protocol.

Access to the register and assignment of user roles is authorised by the administrator of the register.

1. Data on performed operation

  • personal identification number of the patient
  • residence of the patient
  • citizenship in EU
  • date of completion of the record
  • date of operation
  • type of operation
  • localisation of the operation
  • date of primary implantation (first introduction of joint replacement)
  • method of fixing the endoprosthesis (way of anchoring the joint replacement)
  • diagnosis for primary implantation (code from International statistical classification of diseases and related health problems in wording of the 10th revision (ICD-10) 
  • type of any previous operation of the monitored hip joint
  • cause(s) of revision (repeated) operation
  • type(s) of revision (repeated) operation(s)
  • characteristics of operative approach to the operated joint
  • localisation of any skeletal transplants (inserted skeletal grafts)
  • characteristics of used skeletal grafts
  • type of acetabular augmentation (method of reinforcement of the pelvic hole)
  • data on the acetabular component (pelvic part of the joint replacement)
  • data on any use of cement in combination with ATB in acetabular component
  • data on the femoral component (pelvic part of the joint replacement)
  • data on any use of cement in combination with ATB in femoral component
  • presence of hydroxyapatite surface on any component


A statistical unit is a performed operation with application of artificial joint replacement.