周洋 Chris Zhou Profile picture
Chief Resident @UCincyIM. PulmCrit hopeful. Revolving my life around lungs 🫁 + PH, #MedEd, food.
Apr 23, 2020 12 tweets 4 min read
Working on a module reviewing adverse drug reactions (NOT COVID RELATED), but got really excited about this little pharm/clinical pearl, so~

Should a penicillin allergy prevent you from prescribing a cephalosporin?

#medtwitter #tweetorial @medtweetorial

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Beta-lactam antibiotics all share a (you guessed it) beta-lactam ring. Initially, cross-reactivity was thought to be due to antigenicity of the beta-lactam ring itself.

But no!

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Feb 11, 2020 8 tweets 3 min read
The other day, I was asked by a med student: "Why do we give some people antiplatelet therapy and other people anticoagulation therapy?"

Time to talk about thrombotic pathophysiology!

#medtwitter #tweetorial @MedTweetorials

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A major hemodynamic difference between arteries and veins:
- Arteries have high pressure > high shear stress.
- Veins have low pressure > low shear stress.

Veins are like washing a plate in the kitchen sink.
Arteries are like power-washing the wall.

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