Anaesthetic Management of Cataract Surgery in a Patient with Sturge-Weber Syndrome

Sturge-Weber Syndrome (SWS), also called as encephalo trigeminal angiomatosis, is a rare congenital syndrome, characterized by lepto meningeal haemangioma, a facial port-wine stains distributed over the trigeminal nerve area, (usually involving one side) and glaucoma. During cataract surgery, there may be rupture of choroid haemangioma, leading to excessive bleeding, or of haemangioma involving the airway, leading to difficult mask ventilation, laryngoscopy and intubation. We discuss the anaesthetic management of the patient with SWS for cataract surgery

Direct electrochemical detection of bisphenol A at PEDOT-modified glassy carbon electrodes

The electrochemical behavior of bisphenol A (BPA) was studied on poly(3,4-ethylenedioxythiophene) (PEDOT)-modified glassy carbon electrodes by cyclic voltammetry. It was observed that BPA oxidation on PEDOT film produced a BPA polymer (pBPA) showing excellent redox activity with anodic and cathodic peaks at 0.15 and 0.01 V, respectively; the former being evaluated for BPA electrochemical sensing. The amount of deposited pBPA has been estimated by electrochemical and spectroscopic analysis by X-ray photoelectron spectroscopy. The effect of scan rate and pH on the oxidation of pBPA film has been studied. The oxidation current was found to vary linearly with BPA concentration in the range 90–410 μM, and a detection limit of 55 μM was evaluated. Results of BPA amperometric detection have also been collected by using a repetitive potential step program to give a linear response to BPA in the concentration range 40–410 μM with a detection limit of 22 μM and a sensitivity of 1.57 μAμM−1cm−2. The developed sensor showed satisfactory reproducibility and anti-interference properties and was successfully applied to BPA determination in mineral water samples