Title Relationship between the shape of intracranial pressure pulse waveform and computed tomography characteristics in patients after traumatic brain injury /
Authors Kazimierska, Agnieszka ; Uryga, Agnieszka ; Mataczyński, Cyprian ; Czosnyka, Marek ; Lang, Erhard W ; Kasprowicz, Magdalena
DOI 10.1186/s13054-023-04731-z
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Is Part of Critical care.. London : BioMed central. 2023, vol. 27, iss. 1, art. no. 447, p. 1-13.. ISSN 1364-8535. eISSN 1466-609X
Keywords [eng] computed tomography ; intracranial pressure ; morphological analysis ; neuromonitoring ; pulse waveform ; traumatic brain injury
Abstract [eng] Background: Midline shift and mass lesions may occur with traumatic brain injury (TBI) and are associated with higher mortality and morbidity. The shape of intracranial pressure (ICP) pulse waveform reflects the state of cerebrospinal pressure–volume compensation which may be disturbed by brain injury. We aimed to investigate the link between ICP pulse shape and pathological computed tomography (CT) features. Methods: ICP recordings and CT scans from 130 TBI patients from the CENTER-TBI high-resolution sub-study were analyzed retrospectively. Midline shift, lesion volume, Marshall and Rotterdam scores were assessed in the first CT scan after admission and compared with indices derived from the first 24 h of ICP recording: mean ICP, pulse amplitude of ICP (AmpICP) and pulse shape index (PSI). A neural network model was applied to automatically group ICP pulses into four classes ranging from 1 (normal) to 4 (pathological), with PSI calculated as the weighted sum of class numbers. The relationship between each metric and CT measures was assessed using Mann–Whitney U test (groups with midline shift > 5 mm or lesions > 25 cm3 present/absent) and the Spearman correlation coefficient. Performance of ICP-derived metrics in identifying patients with pathological CT findings was assessed using the area under the receiver operating characteristic curve (AUC). Results: PSI was significantly higher in patients with mass lesions (with lesions: 2.4 [1.9–3.1] vs. 1.8 [1.1–2.3] in those without; p 0.7 in classification of patients as presenting pathological CT features compared to AUCs ≤ 0.6 for mean ICP and AmpICP. Conclusions: ICP pulse shape reflects the reduction in cerebrospinal compensatory reserve related to space-occupying lesions despite comparable mean ICP and AmpICP levels. Future validation of PSI is necessary to explore its association with volume imbalance in the intracranial space and a potential complementary role to the existing monitoring strategies.
Published London : BioMed central
Type Journal article
Language English
Publication date 2023
CC license CC license description