UWorld_2.26 Flashcards Preview

USMLE Step 1 > UWorld_2.26 > Flashcards

Flashcards in UWorld_2.26 Deck (9)
1

Hip drops as ipsilateral foot is lifted ==> ?

  • Trendelenburg gait (gluteus medius gait)
  • results from injury to contralateral superior gluteal nerve or gluteus medius muscle

2

Safe places for injections in buttocks region

  • preffered = anterolateral
  • safe = superolateral
  • superomedial ==> risk of superior gluteal n. injury ==> trendeleburg gait
  • superomedial, inferomedial, inferolateral ==> risk of sciatic n. injury

3

Basic psych interviewing techniques

  • facilitation = "and then what happened?
  • reflection = repeat back
  • confrontation = draw attn to discrepancies in responses
  • empathy = understanding of patients experience ("I can imagine...")
  • support = express concern/interest w/out claiming understanding/empathy
  • silence, direct or indirect questioning

4

Proteases and Anti-proteases @ alveoli

  • proteinases
    • elastase <== macs/PMNs
    • cathepsin G
    • matrix metallo-proteases
  • anti-proteases
    • alpha-antitrypsin ==I PMN elastase
    • a2-macroglubulin
    • TIMPs (tissue inhibitors of MMPS) ==I Mac elastase

5

Body fat correlated w/insulin resistance

  • visceral fat [not subq fat]
  • visceral fat is measured by waist-to-hip ratio
  • increased W2H ratio indicates insulin resistance

6

Neonatal manifestations of Turner's 

  • abnormal lymphatic outflow ==>
  1. lymphedema ==> swollen hands and feet 
  2. cystic hygroma
    1. commonly @ neck (esp. @ posterior triangle)
    2. cystic spaces separated by connective tissue rich in lymphoid aggregates

7

Special fat-type found in newborns

  • brown adipose tissue
    • contain several intracytoplasmic fat droplets + many mitochondria vs. white adipose cells
  • fxn = produce heat
    • uncouple oxidative phosphorylation with protein thermogenin
    • ==> energy released by electron transport is dissipated as heat

8

Kartagener presentation

  • chronic respiratory infections 
  • ==> situs inversus (reversal of positioning of interal organs)
    • e.g. dextrocardia
  • infertility

9

Lyme disease characteristics

  • Ixodes tick bite ==> Borrelia burgdorferi infection
  • classic = erythema migrans ==> "bulls-eye rash"

Decks in USMLE Step 1 Class (97):