Flashcards in Tests of Renal Function and Hydration Status Deck (36)
Loading flashcards...
1
What is the active form of vitamin D
1,25 dihyroxycalciferol
2
What is the active form of vitamin D
1,25 dihyroxycalciferol
3
Typical urine volume
750-2000ml/24hrs
4
Oliguria
5
Anuria
6
Polyuria
>3000
7
Normal plasma urea conc
3-8mmol/L
8
What is the problem with plasma urea tests
Not specific, causes include protein intake, tissue trauma, dehydration, kidney filtration, kideny reabsorptiona nd exretion
9
What are the causes of increase in plasma urea
GI bleed, trauma, renal hypoperfusion= all decrease renal blood flow and extracellular fluid volume)
Acute renal impairment, chronic renal disease and post renal obstruction
10
Normal plasma creatinine levels
50-140micromol/l
11
How is plasma creatinine influenced by GFR?
As GFR decreases, plasma creatinine increases
12
In which patients is GFR measured in
Kidney donors or to assess drug dosages
13
What is the equation used to measure creatinine clearance?
Creatinine clearance= (conc. creat in urine x vol of urine)/conc of creat in plasma (micromoles)
14
What is the equation used to measure creatinine clearance?
Creatinine clearance= (conc. creat in urine x vol of urine)/conc of creat in plasma (micromoles)
15
Typical urine volume
750-2000ml/24hrs
16
Oliguria
17
Anuria
18
Polyuria
>3000
19
Normal plasma urea conc
3-8mmol/L
20
What is the problem with plasma urea tests
Not specific, causes include protein intake, tissue trauma, dehydration, kidney filtration, kideny reabsorptiona nd exretion
21
Describe the effect renal oliguria has on the sodium conc in the urine
High sodium conc int eh urine
22
Normal plasma creatinine levels
50-140micromol/l
23
How is plasma creatinine influenced by GFR?
As GFR decreases, plasma creatinine increases
24
In which patients is GFR measured in
Kidney donors or to assess drug dosages
25
What renal function test tests the ability of the kidneys to clear technecium 99?
GFR
26
What is the equation used to measure creatinine clearance?
Creatinine clearance= (conc. creat in urine x vol of urine)/conc of creat in plasma (micromoles)
27
Normal creatinine clearance
100-130ml/min
28
What effect does a low GFR have on creatinine clearance
Decreases
29
What 4 things does eGRF take into account
creatining, age, sex and ethnicity
30
Treatment for stage 5 chronic kidney disease
Dialysis/transplantation
31
Describe the plasma/urine urea ratio and sodium conc in the urine for pre renal oliguria
High P/U urea ratio
Low sodium conc in urine
32
In what type of oliguria is the GFR low, ADH high and urine sodium conc. low?
Pre-renal
33
Causes of pre-renal oliguria
Decreased renal perfusion
Dehydration
Haemorrhage-hypotension
Renal artery damage
34
Describe the effect renal oliguria has on the sodium conc in the urine
High sodium conc int eh urine
35
What is the problem in renal oliguria?
Nephrons are unable to resorb sodium
36
