A comparison between the transfer function of ABP to ICP and compensatory reserve index in TBI

Shahsavari, Sima,1976Chalmers tekniska högskola,Chalmers University of Technology (author)

BACKGROUND: The transfer functions which map the arterial blood pressure to the intracranial pressure and the compensatory reserve index have been investigated by various groups to evaluate the brain compliance of patients with traumatic brain injury. The focus of this study has been to assess the capability of both the above mentioned methods to monitor the intracranial compliance in patients suffering from brain swelling. MATERIALS AND METHODS: Clinical data was collected from sixteen traumatic brain injury patients and split into 4 min segments. For each segment, both the magnitude of the empirical transfer function at the fundamental cardiac frequency and the compensatory reserve index were extracted. FINDINGS: The mean values of the compensatory reserve index and the magnitude of the transfer function which scored higher than 0.7 and 0.1 respectively were recorded for all patients suffering from brain swelling. By comparing the histogram of the magnitude of the transfer function at the fundamental cardiac frequency with the histogram of the compensatory reserve index for all patients, a positive correlation between the mean values and a negative correlation among their variances were observed. The linear correlation between the mean values was estimated at r = 0.82 (p

McKelvey, Tomas,1966Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)mckelvey (author)
Skoglund, Thomas,1969Gothenburg University,Göteborgs universitet,Institutionen för neurovetenskap och fysiologi, sektionen för klinisk neurovetenskap och rehabilitering,Institute of Neuroscience and Physiology, Department of Clinical Neuroscience and Rehabilitation(Swepub:gu)xskoth (author)
Rydenhag, Bertil,1954Sahlgrenska universitetssjukhuset,Sahlgrenska University Hospital (author)
Ritzèn, Catherine Eriksson (author)
Chalmers tekniska högskolaInstitutionen för neurovetenskap och fysiologi, sektionen för klinisk neurovetenskap och rehabilitering (creator_code:org_t)

In:Acta Neurochirurgica, SupplementVienna : Springer Vienna102:102, s. 9-130065-14199783211855775

By the author/editor: Shahsavari, Sima ...; McKelvey, Tomas, ...; Skoglund, Thomas ...; Rydenhag, Bertil ...; Ritzèn, Catherin ...

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Surgery

By the university: Chalmers University of Technology; University of Gothenburg

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