Publications (28) View all
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Article: Subarachnoid haemorrhage induces an inflammatory response followed by a delayed persisting increase in asymmetric dimethylarginine.
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ABSTRACT: Abstract Objective. Subarachnoid haemorrhage (SAH) is associated with an inflammatory systemic response and cardiovascular complications. Asymmetric dimethyl arginine (ADMA), an endogenous inhibitor of nitric oxide synthase, mediates vasoconstriction and might contribute to cerebral vasoconstriction and cardiovascular complications after SAH. ADMA is also involved in inflammation and induces endothelial dysfunction. The aim of this study was to evaluate whether and how CRP (marker for systemic inflammation) and ADMA increased in patients during the acute phase (first week) after SAH. The ADMA level was also assessed in the patients in a non-acute phase (three months), and in healthy controls. Methods. A prospective study of 20 patients with aneurysmal SAH. ADMA and CRP were followed daily during the first week after SAH and a follow up sample for ADMA was obtained 3 months later. A single blood sample for ADMA was collected from age- and sex-matched healthy controls (n = 40, two for each case). Results. CRP increased significantly from day 2; 16 (Confidence interval (CI) 10-23) mg/L to day 4; 84 (CI 47-120) mg/L, (p < 0.01). ADMA increased significantly from day 2; 0.22 (CI 0.17-0.27) μmol/L, to day 7; 0.37 (CI 0.21-0.54) μmol/L, p < 0.01. ADMA remained elevated at a 3-month follow-up: 0.36 (CI 0.31-0.42) μmol/L. ADMA in the first sample from the patients (day 1-3); 0.25 (CI 0.19-0.30) μmol/L, was not different from ADMA in matched healthy controls; 0.25 (CI 0.20-0.31), p > 0.05. Conclusion. After SAH, CRP and ADMA in serum increased significantly during the first week and ADMA remained elevated 3 months later.Scandinavian journal of clinical and laboratory investigation 08/2012; 72(6):484-9. · 1.38 Impact Factor -
Article: Frequency of Non-convulsive Seizures and Non-convulsive Status Epilepticus in Subarachnoid Hemorrhage Patients in Need of Controlled Ventilation and Sedation.
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ABSTRACT: BACKGROUND: Non-convulsive seizures (NCSZ) can be more prevalent than previously recognized among comatose neuro-intensive care patients. The aim of this study was to evaluate the frequency of NCSZ and non-convulsive status epilepticus (NCSE) in sedated and ventilated subarachnoid hemorrhage (SAH) patients. METHODS: Retrospective study at a university hospital neuro-intensive care unit, from January 2008 until June 2010. Patients were treated according to a local protocol, and were initially sedated with midazolam or propofol or combinations of these sedative agents. Thiopental was added for treatment of intracranial hypertension. No wake-up tests were performed. Using NicoletOne(®) equipment (VIASYS Healthcare Inc., USA), continuous EEG recordings based on four electrodes and a reference electrode was inspected at full length both in a two electrode bipolar and a four-channel referential montage. RESULTS: Approximately 5,500 h of continuous EEG were registered in 28 SAH patients (33 % of the patients eligible for inclusion). The median Glasgow Coma scale was 8 (range 3-14) and the median Hunt and Hess score was 4 (range 1-4). During EEG registration, no clinical seizures were observed. In none of the patients inter ictal epileptiform activity was seen. EEG seizures were recorded only in 2/28 (7 %) patients. One of the patients experienced 4 min of an NCSZ and one had a 5 h episode of an NCSE. CONCLUSION: Continuous EEG monitoring is important in detecting NCSZ in sedated patients. Continuous sedation, without wake-up tests, was associated with a low frequency of subclinical seizures in SAH patients in need of controlled ventilation.Neurocritical Care 08/2012; · 2.47 Impact Factor -
Article: Prostacyclin treatment and clinical outcome in severe traumatic brain injury patients managed with an ICP-targeted therapy: a prospective study.
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ABSTRACT: To prospectively assess clinical outcome in patients with severe traumatic brain injury (sTBI) managed according to an ICP-targeted programme as well as additional treatment with prostacyclin. Inclusion criteria were GCS ≤8, age 15-70 years, first recorded cerebral perfusion pressure (CPP) > 10 mm Hg. Exclusion criteria were pregnancy, breastfeeding or penetrating brain injury. The patients were treated using the same ICP-guided protocol, with one group randomized to receive prostacyclin in a low dose (0.5 ng kg(-1 )min(-1)). The clinical outcome was prospectively assessed at 3, 6, 12, 18 and 24 months using structured interviews. Forty-eight patients were included, mean age 35.5 years, median GCS 6 (3-8), 69% were multi-traumatized. Mortality at 3 months was 12.5%. Median Glasgow Outcome Scale (GOS) at all follow-up points was 4. Favourable outcome (GOS 4-5) at 3 months was 52%, at 24 months 64%. Favourable outcome increased over time. There was a statistically significant association between GOS, GCS at admission and age. Higher ICP(max) was associated with worse outcome. With this treatment protocol, a low number of deaths and a high number of favourable outcomes in sTBI were observed. Prostacyclin in this low dose does not seem to improve the outcome. ICP(max) is a positive predictor of worse outcome. Higher GCS at admission and lower age are correlated to better outcome.Brain Injury 01/2012; 26(1):67-75. · 1.36 Impact Factor -
Article: Non-traumatic subarachnoid hemorrhage is associated with subnormal blood creatinine levels.
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ABSTRACT: The aim of this study was to examine the hypothesis that patients with non-traumatic subarachnoid hemorrhage (SAH) have statistically significant subnormal creatinine levels and that the creatinine levels are associated with severity of disease. This was a retrospective observational study over 2 years (2005-2006) in which the SAH patients were divided into patients with severe symptoms and patients with mild/moderate symptoms, and were compared to patients with; traumatic brain injury, trauma without brain injury and patients undergoing elective knee surgery. Blood creatinine levels (day 1-3, and day 7) were recorded. Compared to a normal distribution, SAH patients had statistically significant subnormal creatinine levels day one through seven. SAH patients with severe symptoms had statistically significant subnormal creatinine levels already on day one, in contrast to patients with mild/moderate symptoms. Women with severe symptoms had statistically significant subnormal creatinine levels throughout the study period in contrast to men with severe symptoms who had a normal distribution of creatinine at admission. Women with mild/moderate symptoms had a normal distribution of creatinine only at admission in contrast to men who had a normal distribution of creatinine throughout the study period. Male patients with traumatic brain injury, all trauma patients without brain injury and all patients undergoing elective knee surgery had a normal distribution of creatinine on all studied days. SAH is associated with subnormal serum creatinine levels. This finding is more pronounced in patients with severe symptoms and in women.Scandinavian journal of clinical and laboratory investigation 10/2010; 70(6):438-46. · 1.38 Impact Factor -
Article: Severe traumatic brain injury: consequences of early adverse events.
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ABSTRACT: Several factors associated with an unfavourable outcome after severe traumatic brain injury (TBI) have been described: prolonged pre-hospital time, secondary referral to a level 1 trauma centre, the occurrence of secondary insults such as hypoxia, hypotension or low end-tidal carbon dioxide (ETCO(2)). To determine whether adverse events were linked to outcome, patients with severe TBI were studied before arrival at a level 1 trauma centre. Prospective, observational study design. Patients with severe TBI (n = 48), admitted to Umeå University Hospital between January 2002 to December 2005 were included. All medical records from the site of the accident to arrival at the level 1 trauma centre were collected and evaluated. A pre-hospital time of >60 min, secondary referral to a level 1 trauma centre, documented hypoxia (oxygen saturation <95%), hypotension (systolic blood pressure <90 mmHg), hyperventilation (ETCO(2) <4.5 kPa) or tachycardia (heart rate >100 beats/min) at any time before arrival at a level 1 trauma centre were not significantly related to an unfavourable outcome (Glasgow Outcome Scale 1-3). Early adverse events before arrival at a level 1 trauma centre were without significance for outcome after severe TBI in the trauma system studied.Acta Anaesthesiologica Scandinavica 05/2011; 55(8):944-51. · 2.19 Impact Factor
