7 results
Hyperkalemia - Differential Diagnosis Framework

PseudoHyperkalemia:
 • Lab error
 • Traumatic venipuncture
 • Hemolysis, thrombocytosis, leukocytosis
 •
Burns • Trauma/Crush ... • Digoxin • K ... • Recent IV potassium ... differential #diagnosis #causes ... #potassium #high
Hyperkalemia - Differential Diagnosis Framework

PseudoHyperkalemia:
 • Lab error
 • Traumatic venipuncture
 • Hemolysis, thrombocytosis, leukocytosis
 •
Burns • Trauma/Crush ... • Digoxin • K ... • Recent IV potassium ... differential #diagnosis #causes ... #potassium #high
Hyperkalemia - Diagnosis and Management - GrepMed Handbook

S/Sx: Most pts asymptomatic. Weakness, cramping, nausea, paresthesias, palpitations,
Weakness, cramping, nausea ... Lysis (TLS, rhabdo/crush ... tourniquet / IVF line draw ... only if no clear cause ... Management #Treatment #potassium
Posterior Drawer Test for Posterior Cruciate Ligament (PCL) Injury on Knee Examination 

The Posterior Drawer Test
Posterior Drawer ... on the table, push ... Video via @open_michigan ... PhysicalExam #clinical #video ... #msk #orthopedics
Causes of Hyperkalemia - Differential Diagnosis Framework
 • Cellular Shift:
   - Exercise
Causes of Hyperkalemia ... to Aldosterone: K ... production: TLS, Crush ... hyperkalemia: Blood draw ... #potassium #high
#ICUCard
RENAL
GFR
90-131
mL/min
((140-age)*Wt)/(72*Cr)
Glomerular Filtration Rate (Cockcroft)
CI Cr
90-131
mL/min
(CrU * volume)/CrS
Creatinine Clearance
FENa
0.0-1.0
%
((U/P Na)/(U/P Cr))*100
Fractional Excretion of Na+
Na req
mEq
(125-Na)*0.6*Wt
Required Sodium
FE Urea
4.0-6.0 % (U/P K) ... Trans Tubular Potassium ... calculated 2"(Na + K) ... 70 mmHg on 100% mask ... q5min x 3 (slow push
Posterior Knee Dislocation Injury
Specifically, POSTERIOR KNEE DISLOCATIONS can have significant associated injury that needs unique approach
DISLOCATION: ~25% cases ... lachmans, posterior drawers ... Posterior #Injury #msk ... #clinical #video