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15 Cards in this Set
- Front
- Back
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Asthama def
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variable airflow obstruction in response to certain agents that causes bronchial hyper reactivity "twitchy, irritable airways" that are infalmmed:
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occupational asthams
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2 step diagnosis
1. spirometry-where FEV1 is greatly decreased 2. determine its work relationship *most common occupational lung disease (10-15% all asthama work related) |
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What is a valid workerman's comp claim for asthma?
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pre-existing asthama may be "aggravated" by work (which means, consistent, that doesn't return to baseleline) vs. "exacerbation", which does return to baseline.
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a man comes in, u diagnos w/astham, but what kind? He develops sx w/in 24 hurs, and works with cholrine and ammonia. Does he have an allergy that doesn't allow him to work?
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No, irritatant-induced asthams (asthams W/O latency); does not have allergy and could go back to work.
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What is the allergic asthama caaled?
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Asthama w/latency (sensitzation, type E)..latex, isocynates, large molcs, wood dust
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if s/o gets a normal spirometry test, does this rule out asthma?
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no, its variable so go to a metacholine challenge-
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what would a postive metacholine challenge be?
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a decrease in FEV1 to 80% of baseline+<8mg/ml (hyperreactive) or losing 20% from baseline
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Advere
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a drug that will cause a false neg MC test
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The smaller the PD 20 means a worse disease on a MC test
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the higher the amt of hyperreactivity; IF sensitized Strict avoidance of further exposure
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Restrictive Lung disorders (4)
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1. Pneunoconioses:
a. CWP b. Silicosis (acute & chrnc c. asbestosis 2 Hypersensitivity pneunomitis *all loss of lung vol in response to organic exposures, minteral dust or fibers, NOT FROM LUNG AGENTS, remeber FVC is decreased here |
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Asbestos: 4 possible outcomes in 2 sites in body
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A. pleural changes, no relatiship to cig smoking:
1. benigh (plaques,thcnks,effusions) 2. malignant (mesothelioma) B. Parenchymal changes (LUNG TISSUE) 3. benign (fibrosis)=*asbestosis 4. malignant=lung cancer *so ppl w/lung cancer, cig smoking+asbestos have a synergitic effect |
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So, asbestosis is
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scarring of the lung tissue
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3 compoents to diagnose asbestosis
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1. small IRREGULAR opacities (stu) in lower lung zones
2.plueral changes-can co-exist w/asbestors but not b/c of asbestos 3. b-reading-certified asbestoris reader |
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A b-reader fings pleural plaques-(calicifed lesions) in lung, but a clear lung field?***
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NOT asbestosis, but most common radiographic finding in exposed a. wokrers,
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CWP
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small REGULAR opacities in upper lung zones, no plueral changes
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