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Despite the advances in neurosurgical and -radiological techniques and intensive care, the mortality and morbidity rates in SAH have not changed in recent years. There is still only a limited understanding of the mechanisms of secondary insults causing brain injury after SAH, also called delayed cerebral ischemia (DCI).
In this study, the investigators are exploring the use of quantifiable biomarkers from blood and continuous EEG monitoring as tools for the diagnostics of DCI. Additionally, the investigators are looking into other clinical variables (eg. pain, heart function) as factors of DCI.
Subarachnoidal hemorrhage (SAH) is a cause of long-term disability and death. Annually about 1000 people in Finland suffer from SAH, their average age being under 50 years. SAH has a mortality rate of 12 % acutely and 40 % of patients die within a month from admission to hospital. In addition, 30 % of the surviving patients remain with neurological deficits. Most survivors of the primary insult suffer from a secondary injury during the first 2-3 weeks from the insult.
Despite the advances in neurosurgical and -radiological techniques and intensive care, the mortality and morbidity rates in SAH have not changed in recent years. There is still only a limited understanding of the mechanisms of secondary insults causing brain injury after SAH, also called delayed cerebral ischemia (DCI).
In this study, the investigators are exploring the use of quantifiable biomarkers from blood and continuous EEG monitoring as tools for the diagnostics of DCI. Additionally, the investigators are looking into other clinical variables (eg. pain, heart function) as factors of DCI.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Aneurysmal SAH patients | Patients suffering from aneurysmal subarachnoid haemorrhage |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| ROTEM | Device | ROTEM measurements 24,48, 72, 120, 192 and 288 hours from aneurysmal SAH |
|
| Measure | Description | Time Frame |
|---|---|---|
| Incidence of delayed cerebral ischemia | Incidence of DCI (delayed cerebral ischemia) | 14 days |
| Measure | Description | Time Frame |
|---|---|---|
| Maximal clot firmness of FIBTEM (FIBTEM-MCF) analysis | Maximal clot firmness of FIBTEM analysis (FIBTEM-MCF) using rotational thromboelastometry (ROTEM) assay | at 72 hours |
| Incidence of deep venous thrombosis |
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Inclusion Criteria:
Exclusion Criteria:
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Patients suffering from aneurysmal subarachnoid haemorrhage
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| Name | Affiliation | Role |
|---|---|---|
| Simo Varila | Tampere University Hospital | Study Chair |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Tampere University Hospital | Tampere | 33500 | Finland |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 38422781 | Derived | Raatikainen E, Kiiski H, Kuitunen A, Junttila E, Huhtala H, Kallonen A, Ala-Peijari M, Langsjo J, Saukkonen J, Valo T, Kauppila T, Raerinne S, Frosen J, Vahtera A. Increased blood coagulation is associated with poor neurological outcome in aneurysmal subarachnoid hemorrhage. J Neurol Sci. 2024 Mar 15;458:122943. doi: 10.1016/j.jns.2024.122943. Epub 2024 Feb 23. |
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| ID | Term |
|---|---|
| D013345 | Subarachnoid Hemorrhage |
| ID | Term |
|---|---|
| D020300 | Intracranial Hemorrhages |
| D002561 | Cerebrovascular Disorders |
| D001927 | Brain Diseases |
| D002493 | Central Nervous System Diseases |
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The total amount of blood collected 109.5 ml
| EEG | Procedure | Continuous EEG-monitoring after aneurysm treatment until patient transferred to ward or up to 14 days after aneurysmal SAH |
|
| bilateral compression ultrasound of the lower extremity veins | Procedure | to exclude asymptomatic deep venous thrombosis once over days 3 to 7 |
|
Incidence of deep venous thrombosis
| Within 3-7 days |
| Other rotational thromboelastometry analysis | Maximal clot firmness of extrinsic (EXTEM) analysis (EXTEM-MCF) using rotational thromboelastometry | from 24 to 288 hours |
| Assessment of neurological outcome | Description of the neurological outcome by using extended Glasgow Outcome Score
| 90 days |
| Assessment of pain | Critical Care Pain Observation Tool values, from 0: no pain to 8: maximum pain | Up to 14 days |
| Assessment of cardiopulmonary function by transthoracic echocardiography | Function of the left and right ventricle using scale 1. hyperkinetic,2. normal, 3. moderately impaired, 4. severely impaired | At admission and at at 24±4 hours |
| Continuous electroencephalography | Continuous electroencephalography will be evaluated for signs that are potential surrogates of developing delayed cerebral ischemia (such as alpha-delta-ratio, focal slowing, epileptiform abnormalities, relative alpha variability) | From 48 hours to 14 days |
| Neuroglial brain injury biomarkers | Peripheral blood biomarkers potentially reflecting neuroglial injury will be analysed with enzyme-linked immunosorbent assays | From 24 to 288 hours |
| D009422 | Nervous System Diseases |
| D014652 | Vascular Diseases |
| D002318 | Cardiovascular Diseases |
| D006470 | Hemorrhage |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |