Guidelines to patient preparation for the Rehberg test

  1. Urine is collected during a 24-hour period.
  2. During this time, psychoemotional stresses and physical loads shall be avoided, no physical therapy procedures or X-ray examinations are allowed. A special drinking regimen shall be followed (no more than 1.5 to 2 l of liquid during the day).
  3. Urine sample collection during menstruation or 5 to 7 days following cystoscopy is not allowed.
  4. The first morning portion of urine of the current day shall be discarded.
  5. All the following portions of urine during the day and night, and the morning portion of urine on the following day are collected into the same container with a tight cap. It is recommended to make 100 ml marks on the container.
  6. Following the completion of urine collection, the daily volume of urine shall be determined. After that, urine shall be mixed in the closed container and no less than 50 ml shall be poured into a prepared container of a smaller volume immediately after that. This smaller container shall be delivered to the laboratory. The remaining urine shall be discarded.
  7. After the collection of the morning portion of urine, a venous blood test shall be taken in the procedure room to determine blood creatinine concentration.
  8. The container holding the biomaterial shall be labeled (special barcode of the patient shall be applied) for inpatients, or shall bear a label stating full name of the patient, their birth date, the name of the department and full name of the physician -- for outpatients. The measured daily urine volume (output) must be stated (in milliliters), e.g.: “Urine output: 1,200 ml”.
  9. To prevent inaccurate results, it is not recommended to collect urine samples for different examinations (common urine analysis, 24-hour urine analysis, etc.) on the same day!