The present invention is related to an injection system for injecting an injectate fluid into a blood vessel of the patient and for carrying out a blood pressure measurement of a patient, the injection system comprising a catheter tube having a first end for penetrating the blood vessel of the patient, and a pressure sensor which is arranged close to a second end of the catheter tube and which is adapted to sense a pressure of a liquid in the catheter tube as an indication of the blood pressure of the patient.
