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- 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
Ämnesord
- NATURVETENSKAP -- Data- och informationsvetenskap (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kirurgi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Surgery (hsv//eng)
Nyckelord
- blood pressure
- aged
- middle aged
- signal processing
- intracranial pressure
- Time Factors
- comparative study
- brain circulation
- article
- Computer-Assisted
- time
- physiology
- Humans
- Young Adult
- pathophysiology
- hospitalization
- brain injury
- Cerebrovascular Circulation
- human
- male
- Brain Injuries
- Signal Processing
- Severity of Illness Index
- adolescent
- female
- adult
- Adolescent
- Adult
- Aged
- Blood Pressure
- physiology
- Brain Injuries
- physiopathology
- Cerebrovascular Circulation
- Female
- Humans
- Intracranial Pressure
- Male
- Middle Aged
- Severity of Illness Index
- Signal Processing
- Computer-Assisted
- Time Factors
- Young Adult
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)