Low-frequency sampling for PRx calculation does not reduce prognostication and produces similar CPPopt in intracerebral haemorrhage patients.
Acta Neurochir (Wien). 2011.
PMID: 21909998
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Evaluation and application of ultra-low-frequency pressure reactivity index in pediatric traumatic brain injury patients.
Gritti P, Bonfanti M, Zangari R, Bonanomi E, Pellicioli I, Mandelli P, Longhi L, Rasulo FA, Bertuetti R, Farina A, Biroli F, Lorini FL.
Gritti P, et al.
Acta Neurochir (Wien). 2023 Apr;165(4):865-874. doi: 10.1007/s00701-023-05538-1. Epub 2023 Feb 27.
Acta Neurochir (Wien). 2023.
PMID: 36847979
Clinical Trial.
We evaluate an ultra-low-frequency pressure reactivity index (UL-PRx), based on data sampled at 5-min periods, and test its association with 6-month mortality and unfavorable outcome in a cohort of pTBI patients. ...RESULTS: Data on 47 pTBI p …
We evaluate an ultra-low-frequency pressure reactivity index (UL-PRx), based on data sampled at 5-min periods, a …
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Evaluation and Application of Ultra-Low-Resolution Pressure Reactivity Index in Moderate or Severe Traumatic Brain Injury.
Gritti P, Bonfanti M, Zangari R, Farina A, Longhi L, Rasulo FA, Bertuetti R, Biroli A, Biroli F, Lorini FL.
Gritti P, et al.
J Neurosurg Anesthesiol. 2023 Jul 1;35(3):313-321. doi: 10.1097/ANA.0000000000000847. Epub 2022 May 3.
J Neurosurg Anesthesiol. 2023.
PMID: 35499152
The aim of this study was to evaluate a new index, the ultra-low-frequency PRx (UL-PRx) sampled at 0.0033 Hz at 5 minutes periods, and to investigate its association with outcome. ...CONCLUSIONS: Our findings indicate that ultra-low-fr …
The aim of this study was to evaluate a new index, the ultra-low-frequency PRx (UL-PRx) sampled at 0.0033 …
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'Long' pressure reactivity index (L-PRx) as a measure of autoregulation correlates with outcome in traumatic brain injury patients.
Sánchez-Porras R, Santos E, Czosnyka M, Zheng Z, Unterberg AW, Sakowitz OW.
Sánchez-Porras R, et al.
Acta Neurochir (Wien). 2012 Sep;154(9):1575-81. doi: 10.1007/s00701-012-1423-0. Epub 2012 Jun 29.
Acta Neurochir (Wien). 2012.
PMID: 22743796
A low-frequency sample pressure reactivity index (L-PRx) was calculated, using 20-min averages of MAP and ICP data as a linear Pearson's correlation. ...Significant statistical differences were found in L-PRx, cerebral perfusion pr …
A low-frequency sample pressure reactivity index (L-PRx) was calculated, using 20-min averages of MAP and …
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Intracranial Pressure Thresholds for Cerebral Autoregulation Impairment: Age-Stratified Analysis of Ultra-Low-Frequency Pressure Reactivity Index (UL-PRx) in Traumatic Brain Injury.
Bonfanti M, Lorini FL, Zangari R, Bonanomi E, Farina A, Pezzetti G, Gerevini S, Aresi S, Dell'Avanzo G, Micheli F, Lanterna LA, Biroli F, Gritti P.
Bonfanti M, et al.
Neurocrit Care. 2024 Jul 15. doi: 10.1007/s12028-024-02056-5. Online ahead of print.
Neurocrit Care. 2024.
PMID: 39009939
BACKGROUND: The study investigated the effectiveness of low-frequency sampling in detecting alterations in cerebrovascular reactivity (CVR) associated with changes in intracranial pressure (ICP) in patients with traumatic brain injury (TBI) across diff …
BACKGROUND: The study investigated the effectiveness of low-frequency sampling in detecting alterations in cerebrovascu …
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