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Sinogenic Subdural Empyema in a Ten-Year-Old Boy with Sickle Cell Anemia

Open Journal of Modern Neurosurgery 2013年第4期3卷 53-58页

作者： Ulf Nestler Daniel Memia-Zolo Nidal Salloum Mehdi Mejdoubi francois lengelle Raoul Santiago William Cecile Remus Stegaru Norbert Manzo Department of Neurosurgery Centre Hospitalier Universitaire of Fort de FranceFort-de-FranceFrench West Indies Department of Neurosurgery University Clinic LeipzigLeipzigGermany Department of Radiology Centre Hospitalier Universitaire of Fort de FranceFort-de-FranceFrench West Indies Department of Anesthesiology Centre Hospitalier Universitaire of Fort de FranceFort-de-FranceFrench West Indies Department of Pediatrics Centre Hospitalier Universitaire of Fort de FranceFort-de-FranceFrench West Indies Department of Oto-Rhino-Laryngology Centre Hospitalier Universitaire of Fort de FranceFort-de-FranceFrench West Indies

Objective: Sinogenic subdural empyema remains a neurosurgical emergency, even in the antibiotic era. Sickle cell disease is one of the most frequent hereditary diseases, with an incidence of around 4 in 1000 newborns, which necessitates special considerations before a neurosurgical intervention. Case Description: The case of a 10-year-old boy with sickle cell disease type HbSC is reported, who presented with meningitis about ten days after a nasal sinusitis. CT and MRI showed subdural empyema and immediate intravenous antibiotic treatment was started. The patient received partial exchange transfusion. Craniotomy allowed evacuation of empyema and repairment of a frontobasal dural defect. Endoscopic evacuation of the paranasal sinuses was done in the same anesthesia. After initial good recovery, the patient developed right sided paresis with epileptic seizures a few days later. CT scan revealed three distant empyema recurrencies which were evacuated in a second neurosurgical intervention. The child recovered without neurologic deficit, and control MRI examinations three and twelve months after surgery found frontal and parietal dural thickening as sequelae. Conclusion: Urgent neurosurgical interventions in the presence of sickle cell anemia require special anesthesiologic preparations. An immediate, multidisciplinary approach can lead to a good outcome in these life-threatening situations.

关键词： Nasal Sinusitis Sickle Cell Anemia Streptococcus Pneumoniae Subdural Empyema

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FAST IMPLEMENTATION OF TIME-FREQUENCY REPRESENTATIONS MODIFIED BY THE REASSIGNMENT METHOD

FAST IMPLEMENTATION OF TIME-FREQUENCY REPRESENTATIONS MODIFI...

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1996 3rd International Conference on Signal Processing(ICSP’96)

作者： Cedric RICHARD Regis lengelle Laboratoire LM2S Université de Technologie de Troyes10000 Troyes（France）

＜正＞Cohen’s class Time-Frequency Distributions （CTFDs） have significant potential for the analysis of non-stationary signals,even if the poor readability of their representations makes visual interpretations *** concentrate signal components,Auger and Flandrin generalized the reassignment method（first applied to the spectrogram） to any bilinear ***,this process is computationally *** order to quicken computation time and to improve representations readability,we first introduce a new fast algorithm which allows the recursive evaluation of classical spectrograms and spectrograms modified by the reassignment *** show that rectangular,half-sine, Hamming,Hanning and Blackmail functions can be used as running *** the previous algorithm is extended to *** show that the windows mentioned above can also be used to compute recursively reassigned smoothed pseudo Wigner-Ville ***,we show that the constraints on candidate windows are not very restrictive:any function（assumed periodic） can be used in practice as long as it admits a "short enough" Fourier series decomposition.

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