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Typical ICP waveform shapes
A satisfactory waveform reading may present any of the typical ICP shape characteristics below according to the patient’s clinical condition (from normal to pathological)
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Suggestive reference for ICP waveform shapes
As a suggestive reference, the waveforms below are non invasive ICP waveforms that can be shown with the noninvasive ICP sensor.
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ATTENTION - The waveforms above are examples of typical noninvasive ICP waveforms in different clinical settings. You may see variations in the ICP waveform, but they should always follow a similar pattern. |
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Typical session duration
The monitoring session should be as long as required to assess the ICP waveform. Typical sessions are of 15+ minutes but the final duration is ultimately defined by a trained professional. The session should be finalized upon patient request due to discomfort or decision by the primary caregiver.
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ICP pulse waveform
The ICP pulse waveform is an alternative to assess certain ICP characteristics, irrespective of the absolute values that are typically captured by an invasive method .
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Under normal ICP conditions, the relative amplitudes of the three peaks are related as follows: P1 > P2 > P3 (Box A in Figure above). In conditions with decreased brain compliance and rising ICP, the pulse waveform morphology gradually changes and certain indicators, such as the estimated P2/P1 ratio eventually increases.
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Interpretation warnings
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WARNING - The BcSs-PICNIW-1000/BcSs-PICNIW-2000 Sensor does not replace a comprehensive clinical evaluation. The waveform output should always be evaluated by the clinician in conjunction with other clinical parameters or analyses. |
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WARNING - The clinician is reminded to assess the waveform morphology in real-time during a monitoring session. The B4C report is available for the clinician’s convenience to review associated waveform parameter estimates and other clinical observations entered in a past monitoring session |