Continuous Blood Pressure and Waveform Measurements Comparison Between Invasive Arterial Line and PPG Sensor
Condition: Blood Pressure Measurement
Study type: Observational

Summary: 
      The purpose of this study is to compare blood pressure values (systolic, diastolic, mean
      arterial pressure) and waveform as recorded by a radial arterial line catheter to the
      waveform and values as calculated by the Sensifree's algorithm from a PPG sensor from a
      variety group of patients during elective surgeries.
    

Detailed description: 
      Before induction of anesthesia, an arterial line will be inserted to the patient radial
      artery using a designated short, stiff tubing kit according to catheter IFU (Instructions for
      Use), preferably under US guidance. Removal of air bubbles from the catheter-transducer
      system is mandatory prior to connecting the tubing to the catheter.

      Study nurse will connect a Sensifree laptop with designated data acquisition software
      (Medicollector BEDSIDE) to the multi-parameter monitor communication port and start the
      recording of invasive blood pressure and pulse oximeter pleth (PPG sensor) per software IFU.
      Prior to connecting the arterial line system to the patient, a calibration (flush test) will
      be done and recorded. During the study, any deterioration in the waveform recorded by the
      intra-arterial catheter will be noted and appropriate corrective measures will be taken as
      soon as possible (e.g., flushing or adjusting the position of the catheter).

      Preferable NIBP (Non Invasive Blood Pressure) measurement rate will be every 10 minutes,
      unless the medical procedure requires otherwise.

      Calibration procedure will be repeated every 60 +/- 5 minutes and at the end of the surgery.
      Recording will take place for the duration of the surgery.

      NIBP cuff will be placed over the arterial-line arm, NIBP air hose will be replaced with an
      air hose supplied by Sensifree and the pressure gauge in it will be connected to Sensifree
      laptop via analog to digital converter in order to capture the data.

      Medication used during the surgery will be listed and documented in the CRF (Case Report
      Form) including drugs name, dose, time and method of administration.

      Offline data analysis will compare the blood pressure values as calculated by the Sensifree's
      algorithm based on the PPG signal, to the values obtained from the arterial line. The
      comparison results will be measured against the accuracy performance requirements per ISO
      81060-2.
    

Intervention name(s): Arterial catheterization kit; GE Datex-Ohmeda Finger Clip Pulse Oximeter Sensor; NIBP Cuff (GE Healthcare)
Intervention type(s): Device; Device; Device
Intervention description(s): Invasive monitoring of blood pressure via catheterization of the radial artery, displaying a continuous pressure waveform; PPG based, fingertip mounted sensor, that measures the oxygen level (oxygen saturation) of the blood and generates a waveform; A blood pressure cuff is used to measure blood pressure. The cuff has an inflatable rubber bladder that is typically fastened around the arm. A pressure meter indicates the cuff's pressure.
Observational model: Cohort
Time perspective: Prospective
Sampling method: Non-Probability Sample
Study population: 
        Patients scheduled for elective surgery involving placement of radial artery A-line for BP
        monitoring