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| name | 6.7 - position sensor on patient |
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Step 1 - position sensor Image Added | When starting sensor placement a screen to help with sensor positioning. This will inform you about the headband tightness. Before placing the sensor on the patient's head the option will show that the sensor is too loose. Image Removed |
SENSOR PLACEMENT POSITION  = The sensor must be positioned in the region of the temples (mid eyebrow line), i.e., at 15% of the reference point Fpz towards the Oz reference points at the back of the head following the circumference of the skull. POSITION  = The sensor should contact the scalp in the temporoparietal region about 2 inches (5-6 cm) above the entrance of the external acoustic meatus in the coronal plane and just below the head protrusion where the circumference is greatest. back to top
Step 2 - tighten turnbuckleOnce the sensor is placed, tighten the turnbuckle into a snug, comfortable fit, turning it clockwise until a final click can be heard without excessive force. A proper adjustment will result in a green OK! on the app screen.  If the patient is awake, ask if he is comfortable with the pressure. If not, readjust the headband for a comfortable fit. In conditions where patients are unresponsive, check for signs of discomfort or skin damage for at least every five minutes.
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After sensor placement and tightening an assisted waveform quality window will appear via sample processing according to the table below.
 Image Added | Sample gathering - when correctly positioned, the B4C System will start collecting a 30 second sample of the captured waveform for quality verification |
Image Removed Image Added | Adequate quality - An average 30 second pulse will be presented with respective confidence intervals and will be updated every 5 seconds. |
Image Removed Image Added | Inadequate quality - In some situations, the captured signal does not have sufficient technical quality. The system will indicate this, meaning there is a need to stabilize the patient and/or adjust the sensor. Image Removed |
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PRECAUTION - The signal quality check is NOT a clinical judgement or diagnosis. The is a technical verification and the insufficient signal quality message means one or more of the four conditions below are true: The signal-to-noise ratio is not satisfactory (signal with lack of physiological characteristics) The amount of artifacts is excessive (too much movement being captured in the signal) The processed signal will result in a statistically non-significant P2/P1 ratio Processed signal will result in a non-physiological Time-to-Peak range
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