The Trend above shows the importance of automated trending when performing TCD exams. The PI may give you a day or two heads up as to the direction a patient may be trending. This can be life saving! The pulsatility index (PI) and resistant index (RI) are calculated from TCD parameters as follows: PI (PSV–EDV)/mean CBFV and RI (PSV–EDV)/PSV (Table 2).The pulsatility index is an indicator of amount of vascular resistance in distal intracranial pressure and it is used as indirect evaluation of intracranial pressure when ICP exceeding
20 mmHg. It is also found that there is a good correlation between ICP and RI but this correlation is less sensitive than PI. It should also be noted that PI is less effected by angle and therefore it is a very reproducible measurement when comparing exams over time.
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- Interpretation Of Peripheral Arterial And Venous Doppler Waveforms – A Consensus Statement March 4, 2024
- Cerebral Vasoreactivity Evaluated by Transcranial Color Doppler and Breath-Holding Test in Patients after SARS-CoV-2 Infection – PMC February 22, 2024
- Comparison of diffuse correlation spectroscopy analytical models for measuring cerebral blood flow in adults December 20, 2023
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Latest Blog Posts
- Interpretation Of Peripheral Arterial And Venous Doppler Waveforms – A Consensus Statement March 4, 2024
- Cerebral Vasoreactivity Evaluated by Transcranial Color Doppler and Breath-Holding Test in Patients after SARS-CoV-2 Infection – PMC February 22, 2024
- Comparison of diffuse correlation spectroscopy analytical models for measuring cerebral blood flow in adults December 20, 2023
- Abstract 147: Utilization and Application of Transcranial Doppler Emboli Monitoring for Infective Endocarditis November 20, 2023
- Transcranial Doppler After Successful Endovascular Revascularization and Hospitalization Outcomes June 1, 2023