Cystic Fibrosis Ppt Powerpoint Presentation slides-Medical Slideshow Cystic Fibrosis

Cystic Fibrosis

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Slide 1 :

Cystic Fibrosis Board Review February 11, 2008

Slide 2 :

Cystic Fibrosis Mutation in CFTR gene--epithelial chloride channels mutation causes decreased Cl transport and Na hyperabsorption leading to thick secretions most common mutation is delta-F508 (70%), however, over 1500 mutations exist Autosomal recessive inheritance 1 in 25 to 30 Caucasians is a carrier, making disease prevalence 1 in 3300

Slide 3 :

The lungs Major cause of death (usually by 30 years) is progressive respiratory disease. Increased secretions lead to obstruction, leading to repeated infections (especially psuedomonas), bronchiectasis, and decline in lung function, causing respiratory failure often with a component of pulmonary hypertension and cor pulmonale

Slide 4 :

The pancreas Pancreatic ducts are obstructed by thick secretions, leading to decreased excretion of enzymes into the intestine. Pancreas is autodigested and replaced by scar tissue, resulting in decreased breakdown of fat and protein Fat and protein malabsorption, fat-soluble vitamin deficiency

Slide 5 :

Fat soluble vitamins A (retinol) blindness D rickets K prolonged prothrombin time 2, 7, 9, 10--vitamin K dependant factors E (tocopherol) ptosis proprioception truncal ataxia

Slide 6 :

Presentation General FTT GI meconium ileus in neonate foul smelling stools, bloating rectal prolapse impaction/obstruction pancreatitis low albumin, low sodium cholelithiasis, cholecystitis cirrhosis, portal hypertension neonatal hyperbilirubinemia fat soluble vitamin deficiency Respiratory clubbing asthma COPD, barrel chest productive cough, hemoptysis nasal polyps pneumothorax/mediastinum cor pulmonale, RVH Metabolic dehydration (low Na, low Cl) metabolic alkalosis (esp neonate) DM heat stroke GU infertility in males

Slide 7 :

Diagnosis Elevated serum trypsinogen in neonate Gene testing 87 mutation panel (92% sensitivity) 1300 mutation panel (97 - 99% sensitivity) GOLD STANDARD: CHLORIDE SWEAT TEST <40 mEq/L--negative 40 - 60 mEq/L--equivocal, needs repeat >60 mEq/L--positive, needs confirmation

Slide 8 :

Diagnosis False positives adrenal insufficiency nephrogenic DI hypothyroidism mucopolysaccharidosis G6P deficiency hypoproteinemia anemia from poor nutrition False negatives severe malnutrition with edema too little sweat inexperienced tester

Slide 9 :

Treatment For acute respiratory infections: hospitalization with PCN and aminoglycoside, pulmonary toilet baseline pulmonary therapy aerosols (bronchodilation) chest physical therapy aerosolized antibiotics systemic steroids or expectorants--not indicated

Slide 10 :

Treatment Nutritional therapy high fat, high protein diet pancreatic enzyme replacements vitamin and mineral supplements Other no support for growth hormon

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to repeated infections (especially psuedomonas), bronchiectasis, and decline in lung function, caus more to repeated infections (especially psuedomonas), bronchiectasis, and decline in lung function, causing respiratory failure often with a component of pulmonary hypertension less

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