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ViSi Mobile Smart Tip - Post Pie Troubleshooting

Blood pressure testing is the only way to find out if you have high blood pressure (HBP, or hypertension). Controlling high blood pressure requires an understanding of your results, from Normal to Hypertensive Crisis, and being able to monitor the changes in your blood pressure is vital for your safety. It is slightly stressful to not obtain a blood pressure reading even when you've followed through all the steps, your pie is filled and there's still no displayed reading.


But before anything else we have to first take note:

  • Before connecting the cuff module to the wrist monitor to calibrate, view the ECG rhythm and SpO2 pleth waveform and check for good quality waveforms.
  • Do not use the ViSi Mobile Cuff Module on a patient’s arm where the use of a blood pressure cuff is contraindicated.
  • The ViSi Mobile Monitor, Thumb Sensor, Cuff Module, and the Chest Sensor must all be connected to the same arm for the System to function correctly.
  • Changes in posture and arm height can affect ViSi cNIBP accuracy. If the cNIBP measurement is questionable, retake the measurement. Ideally recalibrate in the same position as the initial calibration
  • Due to cNIBP signal averaging, there is a time delay of up to 120 seconds between the instantaneous blood pressure reading and the displayed reading


So Here's how to troubleshoot:

  • Don't focus your troubleshooting on the thumb censor and chest censor. Focus your troubleshooting on the cuff module, NIBP hose adapter and/or BP cuff.
  • Blood pressure cuff: check for a leak, occulsion & placement/fit of cuff (conical shaped arm)
  • NIBP hose adapter: check for occulsion, broken adapter, not securely connected
  • Cuff Module: check battery for charge.

And Here's how to recalibrate for continuous monitoring:

Sotera’s continuous blood pressure monitor (cNIBP) is based on the relationship between blood pressure and the time it takes a pulse that originates from a cardiac contraction to arrive at a peripheral location. Calibration of PAT for an individual patient requires an initial NIBP cuff measurement. Once this measurement is made, continuous blood pressure is displayed based on averaging PAT calculations from the previous 60 seconds and updating the display every three seconds.

Connect the ViSi Mobile Chest Sensor, Thumb Sensor and Cuff Module and navigate to the Vitals Signs screen.

      • Have the patient positioned in a supine, semi-Fowler’s, or side-lying position during cNIBP calibration.
      • The Start Cuff button will change to the Calibrate cNIBP button. When the patient’s PAT, posture and arm height are stable for approximately 30 seconds, the Calibrate cNIBP button appears with a red cuff indicating cNIBP is ready to be calibrated.

        Note: When the patient’s PAT, posture or arm height is not stable for approximately 30 seconds, the Calibrate cNIBP button is disabled. The button will be disabled until the patient’s PAT, posture and arm height are stable.
      • When the criteria to calibrate cNIBP has not been met, a pie symbol will be displayed on top of the disabled “cNIBP Calibrate” button. The pie will fill and empty to reflect the readiness of the calibration criteria: patient’s PAT, posture and arm height are stable for approximately 30 second
      • The patient should not move until after the red cNIBP measurements are displayed
    • Touch Calibrate cNIBP on the Vital Sign screen

      • The Cuff will start to inflate, indicating the calibration process has started.
      • After a single NIBP measurement has been taken, the ViSi Mobile Monitor will calibrate cNIBP. The NIBP measurement will be displayed in white during the calibration process.
      • After cNIBP has been calibrated, Systolic, Diastolic and MAP measurements will be displayed in red. The displayed measurement will be refreshed every 3 second, The calibration process takes approximately 1 to 2 minutes to complete.
      • If the calibration is not successful, the monitor will use the previous calibration curve. If no previous calibration curve exists, the NIBP measurements will continue to show in white text. The failure will be indicated by a “Calibration Failed” alert.
      • After the calibration process is completed, it is acceptable for the patient to change position.

        Remove the Cuff from the patient and the ViSi Mobile Cuff Module from the Monitor

      • The continuous measurements will continue to display/update even after the cuff has been disconnected.

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Filed Under: ViSi Mobile, ViSi Tip of the Month