Background
Acute symptomatic epileptic seizures are frequently seen in neurocritical care. To prevent subsequent unprovoked seizures, long-term treatments with antiseizure medications are often ...initiated although supporting evidence is lacking. This study aimed at prospectively assessing the risk of unprovoked seizure relapse with respect to the use of antiseizure medications. It was hypothesized that after a first acute symptomatic seizure of structural etiology, the cumulative 12-month risk of unprovoked seizure relapse is ≤ 25%.
Methods
Inclusion criteria were age ≥ 18 and acute symptomatic first-ever epileptic seizure; patients with status epilepticus were excluded. Using telephone and mail interviews, participants were followed for 12 months after the acute symptomatic first seizure. Primary endpoint was the occurrence and timing of a first unprovoked seizure relapse. In addition, neuro-intensivists in Germany were interviewed about their antiseizure treatment strategies through an anonymous online survey.
Results
Eleven of 122 participants with structural etiology had an unprovoked seizure relapse, resulting in a cumulative 12-month risk of 10.7% (95%CI, 4.7%–16.7%). None of 19 participants with a non-structural etiology had a subsequent unprovoked seizure. Compared to structural etiology alone, combined infectious and structural etiology was independently associated with unprovoked seizure relapse (OR 11.1; 95%CI, 1.8–69.7). Median duration of antiseizure treatment was 3.4 months (IQR 0–9.3). Seven out of 11 participants had their unprovoked seizure relapse while taking antiseizure medication; longer treatment durations were not associated with decreased risk of unprovoked seizure relapse. Following the non-representative online survey, most neuro-intensivists consider 3 months or less of antiseizure medication to be adequate.
Conclusions
Even in case of structural etiology, acute symptomatic seizures bear a low risk of subsequent unprovoked seizures. There is still no evidence favoring long-term treatments with antiseizure medications. Hence, individual constellations with an increased risk of unprovoked seizure relapse should be identified, such as central nervous system infections causing structural brain damage. However, in the absence of high-risk features, antiseizure medications should be discontinued early to avoid overtreatment.
Sleep-disordered breathing (SDB) is highly prevalent in acute ischaemic stroke and is associated with worse functional outcome and increased risk of recurrence. Recent meta-analyses suggest the ...possibility of beneficial effects of nocturnal ventilatory treatments (continuous positive airway pressure (CPAP) or adaptive servo-ventilation (ASV)) in stroke patients with SDB. The evidence for a favourable effect of early SDB treatment in acute stroke patients remains, however, uncertain.
eSATIS is an open-label, multicentre (6 centres in 4 countries), interventional, randomized controlled trial in patients with acute ischaemic stroke and significant SDB. Primary outcome of the study is the impact of immediate SDB treatment with non-invasive ASV on infarct progression measured with magnetic resonance imaging in the first 3 months after stroke. Secondary outcomes are the effects of immediate SDB treatment vs non-treatment on clinical outcome (independence in daily functioning, new cardio-/cerebrovascular events including death, cognition) and physiological parameters (blood pressure, endothelial functioning/arterial stiffness). After respiratory polygraphy in the first night after stroke, patients are classified as having significant SDB (apnoea-hypopnoea index (AHI) > 20/h) or no SDB (AHI < 5/h). Patients with significant SDB are randomized to treatment (ASV+ group) or no treatment (ASV- group) from the second night after stroke. In all patients, clinical, physiological and magnetic resonance imaging studies are performed between day 1 (visit 1) and days 4-7 (visit 4) and repeated at day 90 ± 7 (visit 6) after stroke.
The trial will give information on the feasibility and efficacy of ASV treatment in patients with acute stroke and SDB and allows assessing the impact of SDB on stroke outcome. Diagnosing and treating SDB during the acute phase of stroke is not yet current medical practice. Evidence in favour of ASV treatment from a randomized multicentre trial may lead to a change in stroke care and to improved outcomes.
ClinicalTrials.gov NCT02554487 , retrospectively registered on 16 September 2015 (actual study start date, 13 August 2015), and www.kofam.ch (SNCTP000001521).
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV2) profoundly impacts hemostasis and microvasculature. In the light of the dilemma between thromboembolic and hemorrhagic complications, in ...the present paper, we systematically investigate the prevalence, mortality, radiological subtypes, and clinical characteristics of intracranial hemorrhage (ICH) in coronavirus disease (COVID-19) patients.
Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, we performed a systematic review of the literature by screening the PubMed database and included patients diagnosed with COVID-19 and concomitant ICH. We performed a pooled analysis, including a prospectively collected cohort of critically ill COVID-19 patients with ICH, as part of the PANDEMIC registry (Pooled Analysis of Neurologic Disorders Manifesting in Intensive Care of COVID-19).
Our literature review revealed a total of 217 citations. After the selection process, 79 studies and a total of 477 patients were included. The median age was 58.8 years. A total of 23.3% of patients experienced the critical stage of COVID-19, 62.7% of patients were on anticoagulation and 27.5% of the patients received ECMO. The prevalence of ICH was at 0.85% and the mortality at 52.18%, respectively.
ICH in COVID-19 patients is rare, but it has a very poor prognosis. Different subtypes of ICH seen in COVID-19, support the assumption of heterogeneous and multifaceted pathomechanisms contributing to ICH in COVID-19. Further clinical and pathophysiological investigations are warranted to resolve the conflict between thromboembolic and hemorrhagic complications in the future.
We aimed to evaluate the current management of status epilepticus (SE) in intensive care units (ICUs) in Germany, depending on the different hospital levels of care and the ICU specialty. We ...performed a nationwide web-based anonymized survey, including all German ICUs registered with the German Society for Neurointensive and Emergency Care (Deutsche Gesellschaft für Neurointensiv- und Notfallmedizin; DGNI). The response rate was 83/232 (36%). Continuous EEG monitoring (cEEG) was available in 86% of ICUs. Regular written cEEG reports were obtained in only 50%. Drug management was homogeneous with a general consensus regarding substance order: benzodiazepines-anticonvulsants-sedatives. Thereunder first choice substances were lorazepam (90%), levetiracetam (91%), and propofol (73%). Data suggest that network structures for super-refractory SE are not permeable, as 75% did not transfer SE patients. Our survey provides "real world data" concerning the current management of SE in Germany. Uniform standards in the implementation of cEEG could help further improve the overall quality. Initial therapy management is standardized. For super-refractory SE, a concentration of highly specialized centers establishing network structures analogous to neurovascular diseases seems desirable to apply rescue therapies with low evidence carefully, ideally collecting data on this rare condition in registries and clinical trials.
Abstract Purpose We investigated whether a critical rise of intracranial pressure (ICP) leading to a loss of cerebral perfusion pressure (CPP) could serve as a surrogate marker of brain death (BD). ...Materials and Methods We retrospectively analyzed ICP and CPP of patients in whom BD was diagnosed (n = 32, 16–79 years). ICP and CPP were recorded using parenchymal (n = 27) and ventricular probes (n = 5). Data was analyzed from admission until BD was diagnosed. Results ICP was severely elevated (mean ± SD, 95.5 ± 9.8 mmHg) in all patients when BD was diagnosed. In 28 patients, CPP was negative at the time of diagnosis (− 8.2 ± 6.5 mmHg). In four patients (12.5%), CPP was reduced but not negative. In these patients, minimal CPP was 4–18 mmHg. In one patient, loss of CPP occurred 4 hours before apnea completed the BD syndrome. Conclusions BD was universally preceded by a severe reduction of CPP, supporting loss of cerebral perfusion as a critical step in BD development. Our data shows that a negative CPP is neither sufficient nor a prerequisite to diagnose BD. In BD cases with positive CPP we speculate that arterial blood pressure dropped below a critical closing pressure, thereby causing cessation of cerebral blood flow.
Background
Computed tomography angiography (CTA) has been investigated as a confirmatory study (CS) for the diagnosis of brain death (BD). International consensus regarding its use, study parameters, ...and evaluation criteria is lacking. In the German BD guideline, a CTA protocol was first introduced in 2015.
Methods
The authors obtained a comprehensive dataset of all BD examinations in adults from the German organ procurement organization to investigate implementation, results, and impact of CTA on BD determination during the first 4 years.
Results
In 5152 patients with clinically absent brain function, 1272 CTA were reported by 676 hospitals. Use of CTA increased from 17.2% of patients in the first year to 29.7% in the final year. CTA replaced other CS such as electroencephalography without increasing overall CS frequency. Technical failure was rare (0.9%); 89.3% of studies were positive. Negative results (9.8%) were more frequent with secondary brain injury, longer duration of the clinical BD syndrome, or unreliable clinical assessment. Median time to diagnosis was longer with CTA (2.6 h) versus other CS (1.6 h). CTA had no differential impact on the rate of confirmed BD and did not improve access of small hospitals to CS for BD determination.
Conclusions
CTA expands the range of available CS for the diagnosis of BD in adults. Real‐world evidence from a large cohort confirms usability of the German CTA protocol within the guideline‐specified context.
Zusammenfassung
Hintergrund
Seit Inkrafttreten der 4. Fortschreibung der Richtlinie der Bundesärztekammer gelten in Deutschland wesentliche neue Normierungen in der Diagnostik des irreversiblen ...Hirnfunktionsausfalls (IHA). Hierzu zählen die Qualifikationsanforderungen an die Untersucher, zugelassene Verfahren zur apparativen Zusatzdiagnostik und eine Präzisierung zur Abfolge der Prozessschritte.
Fragestellung
Untersuchung der Auswirkungen auf die Praxis der IHA-Feststellung.
Methodik
Deskriptive Auswertung der Dokumentation der Deutschen Stiftung Organtransplantation über IHA-Diagnostik im Vergleich der Zeiträume Juli 2011 bis Juni 2015 (3. Fortschreibung) und Juli 2015 bis Juni 2019 (4. Fortschreibung).
Ergebnisse
Die Zahl der erfassten Patienten sank von 6100 auf 5403. Die stärkste Abnahme betraf Krankenhäuser ohne Neurochirurgie. Kinder unter 14 Jahren waren nicht betroffen. Die klinische Diagnostik erfolgte ab Juli 2015 vermehrt im Bereitschaftsdienst durch externe neurologische Konsiliare. Zusatzdiagnostik erhielten nun 83,8 % der Patienten, zuvor 80,1 %. Die neu etablierte CTA wurde bei 23,2 % eingesetzt. Sie wies in 89,4 % den zerebralen Zirkulationsstillstand nach. Die Zeitdauer zwischen erstmaliger Feststellung der klinischen Ausfallzeichen und Feststellung des IHA stieg von 7,0 ± 12,7 h auf 8,2 ± 14,2 h. Der IHA wurde mit 95,3 % gegenüber 96,6 % geringfügig seltener festgestellt.
Diskussion
Die neuen Normierungen wurden richtlinienkonform umgesetzt. Der Bedarf an konsiliarischer Unterstützung durch Neurologen und Neurochirurgen sowie der Zeitbedarf für die IHA-Feststellung haben zugenommen. Negative Effekte auf die pädiatrische IHA-Diagnostik wurden nicht deutlich. Die CTA wird bei Erwachsenen als neues zusatzdiagnostisches Verfahren flächendeckend erfolgreich eingesetzt.
The 4th update of the guidelines of the German Medical Association on the diagnosis of irreversible loss of brain function (brain death, BD) has introduced important new regulations regarding the ...required qualification of the examiners, approved procedures for ancillary testing, and a clarification regarding the sequencing of diagnostic steps.
Investigation of the implementation and practical effects on the diagnosis of brain death.
Descriptive evaluation of the routine documentation of the German Organ Procurement Organization, comparing the periods July 2011-June 2015 (3rd update) and July 2015-June 2019 (4th update).
Patient numbers decreased from 6100 to 5403. The largest decrease affected hospitals without neurosurgery. Children were not affected. With the 4th update, clinical diagnostics were increasingly performed during on-call hours by external neurologists. Of the patients 83.8% now received ancillary tests compared to 80.1% previously. Computed tomography angiography (CTA), first introduced in the 4th update, was applied in 23.2% and established complete loss of cerebral circulation in 89.4%. The time between first documentation of the clinical signs of BD and certification of BD increased from 7.0 ± 12.7 h to 8.2 ± 14.2 h. The diagnosis was slightly less frequent with 95.3% compared to 96.6%.
The updated standards were implemented in accordance with the guidelines. The demand for external consulting neurologists and neurosurgeons as well as the time required for BD assessment have increased. Negative effects on pediatric BD diagnostics were not apparent. CTA is widely and successfully used in adults as a new ancillary diagnostic procedure.
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