Showing papers by "Hervé Deramond published in 2010"

Percutaneous vertebroplasty for pain management in malignant fractures of the spine with epidural involvement.

Abstract: In the course of our study, we have been able to confirm the feasibility, efficiency, and safety of percutaneous vertebroplasty in the treatment of vertebral fractures of tumorous origin with epidural involvement, with or without neurologic symptoms of medullary or cauda equina compression.

Hepatic vascular flow measurements by phase contrast MRI and doppler echography: A comparative and reproducibility study

Abstract: Purpose: To directly compare and study the variability of parameters related to hepatic blood flow measurements using 3 T phase-contrast magnetic resonance imaging (PC-MRI) and Doppler ultrasound (US). Materials and Methods: Nine healthy subjects were studied. Blood velocities and flow rate measurements were performed in the portal vein and the proper hepatic artery. MR studies were performed using a 3 T imager. Gradient-echo fast phase contrast sequences were used with both cardiac and respiratory gating. MR and Doppler flow parameters were extracted and compared. Two methods of calculation were used for Doppler flow rate analysis. Results: Compared to Doppler US, PC-MRI largely underestimated hepatic flow data with lower variability and higher reproducibility. This reproducibility was more pronounced in the portal vein than in the proper hepatic artery associated with poorer velocity correlations. Total hepatic flow values were 1239 ± 223 mL/min and 1595 ± 521 mL/min for PC-MRI and Doppler US, respectively. Conclusion: Free-breathing PC-MRI can provide reliable noninvasive measurement of hepatic flow parameters compared to Doppler US. The MR technique could help to improve Doppler flow calculations, thereby allowing standardization of protocols, particularly for applications in disease. J. Magn. Reson. Imaging 2010;31:579–588. © 2010 Wiley-Liss, Inc.

Microsurgical anatomy of the ventral callosal radiations: new destination, correlations with diffusion tensor imaging fiber-tracking, and clinical relevance.

Abstract: Object In the current literature, there is a lack of a detailed map of the origin, course, and connections of the ventral callosal radiations of the human brain. Methods The authors used an older dissection technique based on a freezing process as well as diffusion tensor imaging to investigate this area of the human brain. Results The authors demonstrated interconnections between areas 11, 12, and 25 for the callosal radiations of the trunk and rostrum of the corpus callosum; between areas 9, 10, and 32 for the genu; and between areas 6, 8, and 9 for the ventral third of the body. The authors identified new ventral callosal connections crossing the rostrum between both temporal poles and coursing within the temporal stem, and they named these connections the “callosal radiations of Peltier.” They found that the breadth of the callosal radiations slightly increases along their course from the rostrum to the first third of the body of the corpus callosum. Conclusions The fiber dissection and diffusion tens...

Balloon-related complications and technical failures in kyphoplasty for vertebral fractures.

Abstract: BACKGROUND AND PURPOSE: Our aim was to describe the immediate or early complications and technical failures occurring during balloon kyphoplasty (BKP) procedures and attributable to balloon inflation. MATERIALS AND METHODS: We performed a retrospective review of all consecutive kyphoplasty procedures performed in our institution from May 2005 to October 2006. Fifty-one patients were treated by BKP at 75 spinal levels, and 137 vertebroplasties were performed as well. RESULTS: Several recurrent complications or procedural failures were observed during BKP: cortical or endplate fracture by balloon expansion (4 vertebrae), partial vertebral re-collapse after deflation (4 vertebrae), balloon rupture during inflation (5 vertebrae), and transient hyperalgia after the procedure (11 patients, 27.5%). CONCLUSIONS: Several symptomatic or asymptomatic complications and technical failures can occur during BKP. Some modifications of the usual kyphoplasty technique may decrease the frequency of these complications.

Lymphangiomatose kystique osseuse diffuse et localisation splénique: forme mineure d'une atteinte systémique

Abstract: a lymphangiomatose kystique est une affection rare du système lymphatique correspondant à une séquestration de tissu lymphatique secondaire à une anomalie de développement embryologique du système lymphatique. Elle peut être localisée ou systémique mais épargne toujours le système nerveux central. Nous allons rapporter un cas d’atteinte osseuse diffuse et splénique de découverte fortuite chez une jeune enfant de cinq ans.