CKD AKI Flashcards

(56 cards)

1
Q

1) What is CKD (definition used in your notes)?

A
  • Long-term abnormal kidney function and/or structure that stays abnormal
  • CKD = sustained reduction in GFR and/or urinary abnormalities and/or structural abnormalities of renal tract
  • CKD can exist with “okay” GFR early if kidney damage evidence exists (e.g., albuminuria/haematuria)
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2
Q

2) What is end-stage kidney failure (kidney failure) definition?

A
  • GFR < 15 mL/min/1.73m²
  • Or on dialysis / kidney replacement therapy
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3
Q

3) What is AKI (definition + clinical detection)?

A
  • Sudden decline in kidney function affecting:
  • Fluid balance
  • Electrolytes
  • Acid–base balance
  • Detected clinically by:
  • Rising creatinine
  • Falling urine output
  • Early identification + treating the cause quickly reduces complications, damage, and mortality
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4
Q

4) CKD epidemiology facts (from notes):

A
  • 4th leading global cause of death among non-communicable diseases
  • Global prevalence ~9.1%
  • More common in females
  • Men more likely to progress to kidney failure
  • Increases with age
  • Higher rates in high-income countries (ageing + better detection/reporting)
  • Social deprivation linked to higher prevalence
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5
Q

5) CKD causes (UK emphasis):

A
  • Leading causes: diabetes, hypertension
  • Other causes: renovascular disease, inherited renal diseases, glomerulonephritis, reflux nephropathy, heart failure (cardio-renal), ageing
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6
Q

6) CKD “silent but misleading” + symptoms:

A
  • Often missed early; symptoms are non-specific
  • Fatigue, pain, breathlessness
  • Nocturia, polyuria, haematuria
  • Weight loss, poor appetite
  • Muscle cramps, nausea/vomiting
  • Oedema (ankles/feet/hands)
  • Itchy skin, restless legs
  • Anaemia-type symptoms, insomnia
  • Amenorrhoea, erectile dysfunction
  • Psychological symptoms/mental health disorders
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7
Q

7) Why early CKD diagnosis matters:

A
  • Slow/prevent progression to renal failure
  • Time to prepare for dialysis/transplant
  • Earlier management of complications (anaemia, potassium, BP, Ca/PO₄)
  • Better medicines management (dose + side effects)
  • CKD = increased CV risk → early diagnosis reduces CV risk
  • Timely referral reduces morbidity, mortality, and cost
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8
Q

8) Biggest burden of CKD:

A
  • Most people do not progress to kidney failure
  • Biggest burden = increased cardiovascular disease risk
  • Risk rises with:
  • Lower eGFR
  • Higher ACR
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9
Q

9) What does albuminuria/proteinuria indicate?

A
  • Indicates kidney damage
  • Predicts CKD progression and cardiovascular events
  • Proteinuria itself is nephrotoxic (damages renal tubular cells)
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10
Q

10) Albuminuria vs haematuria:

A
  • Albuminuria usually originates from kidney
  • Haematuria may originate from kidney OR urinary tract
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11
Q

11) Measurement of proteinuria and thresholds:

A
  • Use ACR (albumin-to-creatinine ratio)
  • Proteinuria: ACR ≥ 3 mg/mmol
  • PCR × 0.7 ≈ ACR
  • Albuminuria may be earliest sign of kidney disease
  • Used for risk stratification, monitoring, ACEi/ARB/SGLT2 eligibility, and referral decisions
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12
Q

12) Visible haematuria management:

A
  • Fast-track urology referral
  • Imaging and cystoscopy
  • Exclude acute renal disease if indicated
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13
Q

13) Non-visible haematuria management:

A
  • Dipstick 1+ or more
  • Confirm on 2 of 3 tests
  • Check renal function + proteinuria
  • > 60 years → refer urology
  • <60 or negative urology → manage CKD or refer nephrology if abnormal
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14
Q

14) CKD diagnosis rule:

A
  • Abnormalities must persist ≥3 months
  • Either markers of kidney damage OR eGFR <60 on two tests ≥90 days apart
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15
Q

15) Markers of kidney damage:

A
  • ACR ≥3 mg/mmol
  • Urine sediment abnormalities
  • Persistent unexplained haematuria
  • Electrolyte abnormalities due to tubular disorders
  • Histological abnormalities
  • Structural abnormalities (e.g., polycystic kidney)
  • Kidney transplant history
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16
Q

16) CKD stages (GFR based):

A
  • Stage 1: ≥90 with kidney damage
  • Stage 2: 60–89 with damage
  • Stage 3: 30–59
  • Stage 4: 15–29
  • Stage 5: <15 or dialysis
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17
Q

17) eGFR categories (G stages):

A
  • G1 ≥90
  • G2 60–89
  • G3a 45–59
  • G3b 30–44
  • G4 15–29
  • G5 <15
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18
Q

18) Albuminuria categories (A stages):

A
  • A1 <3 mg/mmol
  • A2 3–30 mg/mmol
  • A3 >30 mg/mmol
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19
Q

19) NICE proteinuria management (diabetes):

A
  • ACR <3 → monitor annually
  • ACR ≥3 → start ACEi or ARB
  • Type 2 diabetes + ACR ≥30 → offer SGLT2 inhibitor
  • ACR 3–30 → consider SGLT2 inhibitor
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20
Q

20) NICE proteinuria management (no diabetes):

A
  • ACR <30 → monitor or treat hypertension
  • ACR 30–70 → ACEi/ARB if hypertensive
  • ACR ≥70 → ACEi/ARB + refer specialist
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21
Q

21) Why BP control matters in CKD:

A
  • High BP damages glomeruli
  • Accelerates CKD progression
  • Increases cardiovascular risk
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22
Q

22) ACE inhibitors / ARBs benefits:

A
  • Reduce glomerular pressure
  • Reduce proteinuria
  • Slow CKD progression
  • Protect cardiovascular system
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23
Q

23) BP targets in CKD:

A
  • ACR <70 → <140/90
  • ACR ≥70 → <130/80
  • ≥80 years with T1DM → <150/90
24
Q

24) Resistant hypertension definition:

A
  • BP uncontrolled despite 4 antihypertensive drugs
25
25) Salt restriction in CKD:
- Improves BP control - Reduces fluid retention - Slows CKD progression
26
26) ACEi/ARB indications for proteinuria:
- Non-diabetic: ACR ≥70 OR ≥30 with hypertension - Diabetic: ACR ≥3
27
27) ACEi/ARB cautions:
- Potassium >5 mmol/L - Renovascular disease - Previous deterioration in renal function
28
28) ACEi/ARB monitoring:
- Check creatinine and potassium before starting - Repeat 1–2 weeks after initiation or dose change
29
29) ACEi/ARB renal function change rules:
- Accept small creatinine rise - If creatinine ↑ >30% or eGFR ↓ >25% → investigate/consider stopping
30
30) ACEi/ARB hyperkalaemia management bands:
- K 5.5–5.9 → diet restriction, diuretics, bicarbonate, binders - K 6.0–6.4 → repeat test, remove drugs, adjust treatment
31
31) ACEi + ARB combination rule:
- Should NOT be used - ↑ hyperkalaemia and AKI risk
32
32) ACEi principle in CKD:
- Often continued until dialysis required
33
33) SGLT2 inhibitors examples:
- Empagliflozin - Dapagliflozin
34
34) SGLT2 inhibitors mechanism:
- Block SGLT2 in proximal tubule - Cause glucosuria + osmotic diuresis - Reduce intraglomerular pressure
35
35) SGLT2 inhibitors benefits:
- Slow CKD progression - Reduce cardiovascular risk - Reduce HF hospitalisation - Benefits remain until eGFR ~15
36
36) Finerenone class and mechanism:
- Non-steroidal mineralocorticoid receptor antagonist - Reduces inflammation and fibrosis
37
37) Finerenone indication:
- CKD stage 3–4 with albuminuria in type 2 diabetes
38
38) Cardiovascular risk in CKD:
- CKD increases cardiovascular risk even with mild disease
39
39) Lifestyle measures for CV risk reduction:
- Smoking cessation - Weight loss - Exercise - Salt restriction
40
40) Statin therapy in CKD:
- Atorvastatin 20 mg daily - Increase if non-HDL reduction <40% and eGFR >30
41
41) CKD anaemia cause:
- Reduced erythropoietin production
42
42) CKD anaemia treatment:
- Iron supplementation - Erythropoiesis-stimulating agents
43
43) CKD mineral bone disorder:
- Occurs in CKD stage G4–G5
44
44) Mineral bone disorder disturbances:
- Hyperphosphataemia - Hypocalcaemia - Secondary hyperparathyroidism
45
45) Treatment for mineral bone disorder:
- Phosphate binders - Active vitamin D
46
46) AKI causes:
- Pre-renal - Intrinsic - Post-renal
47
47) AKI detection criteria:
- Creatinine rise ≥26 µmol/L in 48h - ≥1.5× baseline in 7 days - Urine output <0.5 mL/kg/h >6h
48
48) KDIGO AKI staging:
- Stage 1, 2, 3 based on creatinine rise and urine output
49
49) RIFLE criteria:
- Risk - Injury - Failure - Loss - End-stage
50
50) AKI management STOP:
- Sepsis - Toxins - Optimise - Prescribing
51
51) AKI review ROUNDUP:
- Repeat U+Es - Obstruction - Urinalysis - NEWS - Dry or wet - Urine output - Prescriptions
52
52) Medication review groups in AKI:
- Drugs affecting renal blood flow - Renally excreted drugs - Direct nephrotoxins - Drugs with side effects in AKI
53
53) Drug-induced renal failure categories:
- Pre-renal - Direct toxicity - Immunological - Post-renal obstruction
54
54) Urinalysis diagnostic clues:
- RBC/protein → glomerular disease - WBC → tubular/interstitial damage - Uric acid crystals → uric acid nephropathy
55
55) Fluid retention management:
- Fluid restriction - Low salt diet - Loop diuretics effective at low GFR
56
56) Hyperkalaemia emergency management:
- ECG if K ≥6 - IV calcium stabilises heart - Insulin + glucose and salbutamol shift K intracellularly - Remove K with diuretics/binders - Dialysis if refractory