UWorld 3 Flashcards
What is the emergency Tx of tension pneumothorax?
Needle thoracostomy
Where is a needle thoracostomy for tension pneumothorax done?
2nd intercostal space, mid-clavicular line
How should a tension pneumothorax be treated following needle thoracostomy?
Tube thoracostomy
Where should a tube thoracostomy be placed for pneumothorax?
5th intercostal space, mid-axillary line
What nerve is most commonly injured in mid shaft fracture of the humerus or its reduction?
Radial n.
What is the next best step when a solitary pulmonary nodule has been discovered on CXR?
CT scan
What kind of renal stones are formed in pts w/ Crohn’s or other diseases causing fat malabsorption?
oxalate
Why is there increased intestinal oxalate absorption in Crohn’s pts?
Ca++, which usu. binds oxalate in the gut, preferentially binds to the unabsorbed fat, allowing the oxalate to be absorbed.
What is the psoas sign?
flexion of hip against resistance causes significant abdominal pain
What should be done to treat pts presenting w/in 72 hrs after appendiceal perforation?
emergent laparotomy
What should be done to treat pts presenting >72 hrs after appendiceal perforation who are stable?
IV Abx, abscess drainage, and interval appendectomy 6-8 wks later
What are the main Sx of parasitic colitis?
diarrhea and fever
_______ cord syndrome presents with bilateral loss of position and vibratory sense.
Posterior
_______ cord syndrome presents with weakness more pronounced in the upper than lower extremities, which may be accompanied by localized deficit in pain/temp. sensation.
Central
_______ cord syndrome presents with bilateral spastic motor paresis distal to the lesion.
Anterior
What is the usual cause of anterior cord syndrome?
occlusion of vertebral artery
Who is the typical pt w/ central cord syndrome following trauma?
elderly person w/ degenerative changes in cervical spine
What is the next best step in a pt w/ classic clinical signs of appendicitis?
appendectomy (skip the CT!)
What imaging modality should be used to Dx soft tissue injuries of the knee (tendons, ligaments, menisci)?
MRI
What is the preferred Tx for MCL tears?
bracing and early ambulation
