Method and device for optimizing the measurement accuracy in vivo when measuring invasive blood pressure using a fluid-filled catheter-manometer system
Method and device for optimizing the measurement accuracy in vivo when measuring invasive blood pressure using a fluid-filled catheter-manometer system including a medical signal processing device a catheter a pressure line connected to the catheter a pressure transducer-flush system unit connected to the pressure line and to a pressurised storage bag, and having an integrated pressure transducer and an integrated flush system, the pressure transducer having a membrane to convert a pressure signal into an electric signal that is transmitted to the medical signal processing device, the flush system ensuring that a continuous flush from the storage bag to the catheter is maintained, the flush system having a manually operable element configured for temporarily, briefly opening and closing the flush system. The following values are calculated: a natural frequency, damping coefficient, a dynamic response diagram using the calculated natural frequency and damping coefficient, and an inverted dynamic response diagram used as a filter to process a signal measured by the pressure transducer and afterwards, an invasive blood pressure signal and invasive blood pressure values are calculated from the processed signal.
