Related Experiment Video
Updated: Aug 17, 2026
Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
Published on: June 18, 2021
[Prognostic value of computerized rheoencephalography in chronic posttraumatic subdural hematoma: a preliminary
Mariusz Krupa1, Wojciech Traczewski, Marek Moskała
1Klinika Neurolotraumatologii, Collegium Medicum, Uniwersytet Jagielloński w Krakowie. krupa@cm-uj.krakow.pl
Insights
Impaired cerebral blood flow and reduced arterial compliance in chronic subdural hematoma (CSDH) patients predict poor treatment outcomes. These findings highlight the prognostic significance of cerebrovascular autoregulation in CSDH.
Area of Science:
- Neurology
- Neurosurgery
- Vascular Physiology
Context:
- Chronic subdural hematoma (CSDH) treatment outcomes remain suboptimal.
- Cerebral hemodynamics are crucial for understanding CSDH pathophysiology.
- Cerebrovascular autoregulation in CSDH is understudied.
Purpose:
- To assess cerebral artery compliance in CSDH patients.
- To evaluate the autoregulatory reserve in CSDH.
- To determine the impact on neurological outcomes.
Summary:
- Ten posttraumatic CSDH patients underwent computerized rheoencephalography (REG).
- Cerebrovascular autoregulation and arterial compliance were assessed.
- Autoregulatory reserve was measured by REG pulse waveform changes during tilting.
Impact:
- Reduced autoregulatory reserve was observed in all patients.
- Decreased arterial compliance was noted in 6 patients.
- Bilateral impairment of cerebrovascular autoregulation correlated with poor treatment results.
Background And Purpose:
The results of treatment of chronic subdural hematoma (CSDH) are still regarded as unsatisfactory. Measurements of cerebral hemodynamics are increasingly used to elucidate the pathophysiology of mental disturbances and hemiparesis in CSDH. On the other hand the clinical studies of cerebrovascular autoregulation in this condition are almost nonexistent. This study was therefore conducted to assess the cerebral artery compliance and the status of the autoregulatory reserve in CSDH as well as their effect on the neurological outcome.
Material And Methods:
Ten patients with posttraumatic CSDH were studied. The status of cerebrovascular autoregulation and compliance of arteries were investigated using computerized rheoencephalography (REG). A classification of the pulse waveform (REGpw) has been devised according to the number of inflection points in the ascending branch. The normal cases have corresponded with only one inflection point (category I). The presence of three or more inflection points was thought as characteristic for regressive changes of the arterial wall (category II). The capacity of autoregulatory reserve was estimated by studying the changes in amplitude of REGpw as a response to upper body-down tilting.
Results:
In all patients the REG examination revealed a reduction in autoregulatory reserve. In 3 patients with the worst clinical result of treatment bilateral impairment of cerebrovascular autoregulation was found. The reduction in compliance of arteries was revealed in 6 patients.
Conclusions:
Our preliminary results indicate that bilateral impairment of the cerebral blood flow and the decrease in arterial compliance are of prognostic significance in patients with CSDH.