logging in or signing up mercury poisoning aishu12 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 1291 Category: Entertainment License: All Rights Reserved Like it (1) Dislike it (0) Added: March 09, 2012 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript PowerPoint Presentation: ` MERCURY POISONINGFORMS OF MERCURY: FORMS OF MERCURY There are 3 different forms of mercury - elemental - inorganic - organic Each has a different toxicological profileSOURCES OF MERCURY: SOURCES OF MERCURY Elemental mercury: Sphygmomanometers, thermometers, barometers Liquid at room temp – volatilises easily Sphygmomanometer s , thermometers barometerSOURCES OF MERCURY: SOURCES OF MERCURY Inorganic mercury: Traditional remedies ( ayurvedic , chinese ) Used in gold extraction, caustic soda manufacturing RodenticidesSOURCES OF MERCURY: SOURCES OF MERCURY Organic mercury: Fungicides, seed dressings Methyl mercury in fishACCUMULATION OF MERCURY: ACCUMULATION OF MERCURYABSORPTION OF MERCURY: ABSORPTION OF MERCURY Inhalation : 60-80% Dermal : 3-15% GI Tract : Metallic <0.2% Inorganic 15% Organic 90 + %Organic mercury poisoning: Organic mercury poisoning Rare but severe Effects: CNS Toxicity: poor concentration, fatigue, ataxia, tremor, constricted visual fields, coma & convulsions BM suppression Renal toxicity - dealkylation to inorganic form Poorer response to treatmentInorganic mercury poisoning: Inorganic mercury poisoning Gastrointestinal phase : Hg 2+ is a potent GI irritant gingivitis, stomatitis oesophageal, gastric, small and large bowel erosions haematemesis, diarrhoea, CVS collapse Systemic toxicity : Hg 2+ inhibits sulphydryl enzymes hypotension, lactic acidosis Nephrotoxicity : Hg 2+ deposits in the tubules acute renal failure potentially leads to CRF in survivors Biopsy of kidney showing mercury in itElemental Mercury poisoning: Elemental Mercury poisoning ACUTE: Irritant respiratory effects: cough, dyspnoea pulmonary oedema Metal fume fever: pyrexia, cough, malaise, flu-like symptoms CNS features: confusion, emotional lability, psychoses convulsions, CNS depression & coma Renal effects: rarely ARFElemental Mercury poisoning: Elemental Mercury poisoning CHRONIC: ‘ Erethism ’ TREMOR, dysarthria peripheral neuropathy, sweating personality change Stomatitis, gingivitis Chronic renal impairment Acrodynia - related to elemental mercury exposure in children Acrodynia gingivitis stomachitisPowerPoint Presentation: local complications Systemic toxicity i.v / i.m injection causes complication as depicted:Pulmonary absorption on inhalation: Pulmonary absorption on inhalation Healthy lungs Lungs with mercury(inhaled)Diagnosis: Diagnosis Blood mercury: only really useful acutely normal <10µg/l symptoms with blood mercury >150-200µg/l Urine mercury: probably the most reliable indicator normal <10µg/l symptoms with urine mercury >100-150µg/l U&E Radiology: for elemental ingestion/aspiration/injectionTHERAPY: THERAPY Dimercaprol widely used for inorganic mercury; effective for protection of kidney (Hg++) ineffective from protection of brain (CH3Hg+) cannot be given orally, side effects Pencillamine given orally effective for Hg, less so for CH3Hg+ some side effects Dimercaptosuccinic acid (DMSA) given orally probably effective for CH3Hg+, Hg, Hg++ low toxicity Polythiol resion CH3Hg+ only pencillamine DMSA dimercaprol You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.