A charger for charging a pressure sensing catheter is provided. The charger can include a plurality of charging ports for receiving a portion of the proximal section of the pressure sensing catheter. The charging port may include an engagement portion for engaging with the portion of the proximal section of the pressure sensing catheter such that when the engagement portion engages with the proximal section of the pressure sensing catheter, the engagement portion is fluidly coupled to the catheter lumen and the pressure transmission medium from the engagement portion is displaced from the engagement portion to charge the one or more balloons of the pressure sensing catheter. The charger can include a cover for covering the engagement portion. The charger can include flutes defined on a surface of each charging port to permit a predetermined volume of the pressure transmission medium to be displaced from each charging port.