Low urine output

Question 1

low urine output DDx

complications

Answer 1

hypovolaemia
blocked catheter
AKI
- pre: hypotension, sepsis, HF, meds (ACEi etc.)
- renal: acute tubular necrosis, nephrotoxic meds, GN
- post: urinary obstruction/ retention

complications:
AKI, acute tubular necrosis

Question 2

low UO during call

Answer 2

background
obs
fluid balance

ask for: bladder scan, flush catheter or change

Question 3

low UO exam

Answer 3

obs
fluid balance
multi system exam
hydration status exam (pulm/periph oedema)
examine/flush catheter

Question 4

low UO Ix

Answer 4

B: UE + VBG (acidosis/low bicarb/hyperkalaemia)
O: urine dip
X: bladder scan (if >500ml or true low UO, consider renal USS)

Question 5

low UO Rx

Answer 5

catheter (relieve retention)

monitor fluid balance

flush catheter

stop renal excreted drugs

Rx cause: fluids for pre renal, relieve obstruction for post renal

fluid bolus + reassess (repeat bladder scan if no increased UO)