f

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FEF25-75%

Forced Expiratory Flow over middle half of FVC

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FEV

Forced Expiratory Volume

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FEV1

Forced Expiratory Volume in first second

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FFP2 respirators

CDC and WHO recommend NIOSH certified N95 or European CE certified EN 143 P2/EN149…

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Fiber

That portion of ingested foodstuffs that cannot be broken down by intestinal enzymes and…

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Fibrin

An elastic, insoluble, whitish protein produced by the action of thrombin on fibrinogen and…

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Filum terminale

A long, slender, nerve-free filament that forms the end of the spinal cord.

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FIO2

Fraction of Inspired Oxygen

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First intention healing

The optimal type of healing in which the incised tissues heal from side to…

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Fissure

Horizontal cracks in the skin most notable in irritation reactions.

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Fistula

A fistula is an abnormal connection between an organ, vessel, or intestine and another…

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Fit test

All disposable respirators that rely on a mask-to-face seal need to be annually checked…

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