Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia
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Randomized Controlled Trial Comparative Study
Effect of pregabalin on post-dural-puncture headache following spinal anesthesia and lumbar puncture.
In this study, we aimed to investigate the effect of pregabalin on post-dural-puncture headache (PDPH). Forty patients who developed PDPH after spinal anesthesia or diagnostic and/or therapeutic lumbar puncture were divided into two groups and followed for 5 days. The first group received 150 mg/day oral pregabalin for the first 3 days, then 300 mg/day for a further 2 days. ⋯ Patient headaches were scored using the visual analog scale, and diclofenac sodium and pethidine requirements were recorded. Relative to the placebo group, the group administered pregabalin had significantly lower visual analog scale scores after the second day of treatment, and had significantly lower diclofenac sodium requirements. Our results indicate that pregabalin may be useful for the management of PDPH.
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Review
Current status of computational fluid dynamics for cerebral aneurysms: the clinician's perspective.
The ultimate management goal for unruptured intracranial aneurysms is to select the aneurysms at risk of rupture and treat them. Computational fluid dynamics (CFD) utilizes mechanical engineering principles to explicate what occurs in tubes (vessels) and bulges (aneurysms). CFD parameters have been related to the biological processes that occur in the aneurysm wall, and models have been developed to predict the risk of aneurysm rupture. ⋯ All relevant articles were then reviewed by a vascular neurosurgeon, who found that the hemodynamic parameters of wall shear stress (WSS), WSS gradient, inflow jet, impingement zone, and aneurysm inflow-angle (IA) lack the predictive values required for clinical practice. CFD study can now be simulated and reproduced in a simple and fast analysis of steady, non-pulsatile flow with phase contrast magnetic resonance-derived volumetric inflow rate but the key question of whether a patient-specific CFD model can predict the rupture risk of unruptured intracranial aneurysms remains to be determined in future studies incorporating multivariate analysis. CFD models will become available for routine clinical practice as the computational power of computers further improves.
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Minimally invasive modalities have demonstrated efficacy in the treatment of neurogenic claudication. Direct comparisons, however, between complication rates of these newer techniques with open surgical techniques for lumbar decompression are lacking. This single-institution study examined neurogenic claudicants between August 2007 and June 2009. ⋯ Morbidity was divided into major and minor categories as defined by degree of requisite intervention and adverse impact on hospital stay. Average age, number of surgical levels, and pre-operative American Society of Anesthesiologists Physical Status Index scores were similar in each group (p>0.05). While minimally invasive surgery may be associated with slightly longer operative times, there is decreased blood loss, shorter hospital stays, and likely decreased requirements for ancillary support services upon discharge.
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The present study investigates the histological alterations and expression of matrix metalloproteinase 9 (MMP-9) in disc specimens of 43 patients who underwent surgery for lumbar disc herniation. The immunostaining for MMP-9 was evaluated semi-quantitatively. Histologic degeneration was scored between 0 and 12 depending on the degree of chondrocyte proliferation and presence of tears and clefts, granular changes and mucous degeneration. ⋯ MMP-9 expression was related to histologic degenerative score in all age groups (p=0.0065). MMP-9 was also related to herniation grade in patients younger than 30 years of age (p=0.0037). No significant association was found between MMP-9 expression and herniation grade in patients who were 30-60 years or over 60 years of age.
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The objective of our study was to compare the incidences of cardiovascular disturbance during venous air embolism (VAE) episodes detected using transesophageal echocardiography (TEE) and end tidal carbon dioxide (ETCO(2)) tension monitoring. We retrospectively analyzed the anesthesia records of patients who underwent posterior fossa surgery while in the sitting position and who were simultaneously monitored using both TEE and ETCO(2) tension monitoring. Data on the occurrence of VAE and the cardiovascular changes associated with it were recorded. ⋯ No instances of cardiovascular disturbance were detected in the ETCO(2)-negative group, whereas the incidences of tachycardia and hypotension were 20% and 30%, respectively, in the ETCO(2)-positive group. None of the episodes of VAE detected by TEE (without a fall in ETCO(2)) were clinically significant. We conclude that ETCO(2) monitoring is sensitive enough to detect hemodynamically significant VAE episodes.