To describe a convenient and inexpensive method for anchoring depth electrodes that prevents migration and incidental pullout while allowing electrode removal at the bedside.\n\nMETHODS: An easily breakable suture (eg, MONOCRYL) is tied around both the depth electrode and a heavy nylon suture and anchored to a hole at the edge of the burr hole; the tails of both are tunneled together percutaneously. The “break-away” MONOCRYL suture effectively anchors the electrode for as long as needed. At the completion Sapanisertib of the intracranial electroencephalography session, the 2 tails of the nylon suture are pulled to break their encompassing MONOCRYL anchor suture, thus freeing the depth electrode for easy removal.\n\nRESULTS: The break-away depth electrode anchoring technique was used for 438 electrodes in 68 patients, followed by explantation
of these and associated strip electrodes without reopening the incision. find more Only 1 electrode (0.2%) migrated spontaneously, and 3 depth electrodes (0.7%) fractured in 2 patients (2.9%) on explantation, necessitating open surgery to remove them in 1 of the patients (1.5%).\n\nCONCLUSION: An easy and inexpensive anchoring configuration for depth electrodes is described that provides an effective and safe means of securing the electrodes while allowing easy explantation at the bedside.”
“We present an implementation of a method we previously reported allowing the newer antiepileptic drugs (AEDs) rufinamide (RFN) and zonisamide (ZNS) to be simultaneously determined with lamotrigine (LTG), oxcarbazepine’s (OXC) main active metabolite
monohydroxycarbamazepine (MHD) and felbamate (FBM) in plasma of patients with epilepsy using high performance liquid chromatography (HPLC) with UV detection. Plasma samples (250 mu L) were deproteinized by 1 mL acetonitrile spiked with citalopram as internal standard (I.S.). HPLC analysis was carried out on a Synergi 4 mu m Hydro-RP. 250 mm x 4.6 mm I.D. column.The mobile phase was a mixture of potassium dihydrogen phosphate buffer (50 mM, pH 4.5), acetonitrile and methanol (65:26.2:8.8, v/v/v) Kinase Inhibitor Library mouse at an isocratic flow rate of 0.8 mL/min. The UV detector was set at 210 nm. The chromatographic run lasted 19 min. Commonly coprescribed AEDs did not interfere with the assay. Calibration curves were linear for both AEDs over a range of 2-40 mu g/mL for RFN and 2-80 mu g/mL for ZNS. The limit of quantitation was 2 mu g/mL for both analytes and the absolute recovery ranged from 97% to 103% for RFN, ZNS and the I.S. Intra- and interassay precision and accuracy were lower than 10% at all tested concentrations. The present study describes the first simple and validated method for RFN determination in plasma of patients with epilepsy.