ABEM Recert Exam pt. 1 Flashcards
Mechanism of hypovolemic hyponatremia
Loss of Na in excess of loss of H2O
Rx for hypovolemic hyponatremia
Saline
Mechanism of euvolemic hyponatremia
Dilutional from slight water retention
Types of euvolemic hyponatremia
- Hypothyroidism
- Arsenal insufficiency
- Psychogenic polydipsia
- SIADH
HAPS
Rx for euvolemic hyponatremia
Fluid restrition
Mechanism of hypervolemic hyponatremia
Severe water retention
Types of hypervolemic hyponatremia
- Acute renal failure
- Hyperglycemia
- Severe edema
Rx for hypervolemic hyponatremia
Fluid restriction
Maximum rate of correction of Na in hyponatremia
0.5 meq/L/hr in chronic
1 meq/L/h in acute
Usual cause of hypernatremia
Decreased total body water
Mechanism of diabetes insipidus
Lack of ADH; causes hypernatremia
Hypercalcemia: MCC
Malignancy
Hypercalemia: Si/sx based on levels
<12: asymptomatic or mild N/V and anorexia
12-14: weakness & fatigue
15+: altered MS
Hypercalcemia: Rx
Lasix
Hypocalcemia: Usual causes
parathyroidism or thyroid surgery
Chvostek sign:
Seen with hypocalcemia
Twitching of mouth with tapping on facial nerve
Trousseau sign
Seen with hypocalcemia
Carpal spasm with inflation of BP cuff
Hypocalcemia: si/sx
Anorexia, N/V, fatigue
Hypomagnesiumemia: si/sx
Anoerxia, N/V, fatigue
Malempatti: how is it scored?
1 = best view 4 = horrible view
ETT: Where to secure in adult males and females
21cm at lip in females
23cm at lip in males
When to perform needle cricothyroidotomy?
Infants and small children, can’t do typical open crich because membrane is too small
When to use uncuffed ET tubes?
Age <2
Where is narrowest part of airway?
Adults = vocal cords Pediatrics = criccoid rings
ET tube: How to calculate size
(Age / 4) + 4
ET tube: How far to insert in peds
3 x ETT size
Blade to use for intubation with term infants
Miller 1
Blade to use for intubation with preterm infants
Miller 0
Benzocaine: What toxicity is seen with excess use of?
Methemoglobinemia
How to tell amides and esters apart?
Amides have “i” prior to caine in name
Esters don’t
Lidocaine: Maximal dose for local infiltration
5 mg/kg
Orbital wall fracture: What is most common?
Inferomedial wall
Hypopeon: Disposition
Immediate ophtho consult in ED
Thyroid hormone: Mechanism of production
- Hypothalamus makes Thyroid releasing hormone
- TRH stimulates Anterior Pituitary to release TSH.
- TSH stimulates Thyroid Gland to release T4
- Liver & kidneys convert T4 into T3
Graves dz: Pathophysiology
Inappropriate stimulation of thyroid gland by autoantibodies against TSH receptor.
Causes hyperthyroidism
Thyroid storm: MCC
Infection
Thyroid storm: Rx
- Supportive care
- Beta blockers
- PTU (reduces conversion of T4 into T3)
- SSKI - 1 hour after PTU (decreases synthesis of new T4)
- Dexamethasone or hydrocortisone
- Identify and treat cause
Hypoglycemia: Defintion
<70 mg/dL
Malignant otitis externa: MCC
Pseudomonas is almost always cause
Surgical consult is mandatory
Isolated scapula fx: Rx
Sling
Often secondary to significant MOI, so must consider further w/u
Bankart lesion: Definition
Labral detachment in shoulder
May or may not be visible on xray
Radial nerve: Anatomic path
Inside of upper arm along humerus
Often injured with humeral fracture
Montaggia fracture: Definition
Ulnar fracture with radial head dislocation
GRUM
Galeazzi fracture: Definition
Radius fracture with radioulnar dislocation.
GRUM
Carpal bone: Most common fractured
Scaphoid
Triquetrium is 2nd most common but most commonly missed
Median nerve: Motor and sensory functions
Motor: Make OK with thumb and finger
Sensory: Palm of thumb, index, middle and 1/2 of ring finger
Median nerve: Where is it injured?
Anecubital fossa
Radial nerve: Where is it injured?
Humerus fractures
Ulnar nerve: Motor and sensory functions
Motor: Spread fingers against resistance
Sensory: Palm and dorsal aspect of 1/2 of ring and entire small finger
Ulnar nerve: Where is it injured?
Passes by ulnar styloid at elbow
Radial nerve: Motor and sensory functions
Motor: Wrist & finger extension
Sensory: Back of thumb, index, middle, and 1/2 of ring fingers
Mallet finger: Definition
Damage to extensor tendon, so DIP is flexed and cannot fully extend
Mallet finger: Rx
Splint DIP in extension for 6 weeks
Jersey finger: Definition
Disruption of FDP on volar (palmar) aspect of distal phalynx
Causes inability to flex DIP
Jerser finger: Rx
Referral for prompt surgical repair
Hip dislocations: Types
90% are posterior (e.g. hitting flexed knee/hip on dashboard)
10% are anterior
Tibial plateau fracture: What nerve is injured?
Deep peroneal nerve
Knee dislocation: Possible associated injury
Popliteal artery
Ankle sprains: What is injured in most?
ATFL (found laterally on ankle)
Deltoid ligament: Where is it on ankle?
Medial
Jones fracture: Defintion
Transverse proximal 5th metatarsal fx