CKD Flashcards
Define CKD
Abnormalities of kidney structure or function , present for > 3 months with implications for health
What are the criteria for CKD?
For >3 months, either:
1 or more markers of kidney damage:
- Albuminuria (ACR > or = 30mg/g)
- Urine sediment abnormalities
- Electrolyte and other abnormalities due to tubular disorders
- Abnormalities detected by histology
- Structural abnormalities detected by imaging
- History of kidney transplantation
OR decreased GFR <60ml/min/1.73m2
Which investigations can be done to confirm CKD?
What in each test would you be looking for?
Urine dip: Proteinuria
U&Es: reduced GFR
Renal USS: structural abnormalities
Urine ACR/PCR: lab confirmed protein or albuminuria
Renal biopsy: histology of renal disease
What is creatinine?
Why is it used as a marker of kidney function?
Breakdown product of skeletal muscle
Excreted exclusively by the kidneys
What influences normal creatinine levels?
Muscle bulk, which can depend on gender, ethnicity, weight and age
Which information is used to calculate GFR?
Serum creatinine
Serum cystatin C
Age
Gender
Race
Weight
List some of the causes of CKD
Which are the biggest causes?
Type 2 diabetes
HTN
Type 1 diabetes
Glomerular diseases
Cystic/hereditary
Nephritis
Tumours
What bedside tests can be conducted to investigate the cause of CKD?
What would you be looking for?
Urine dip:
- Protein or blood
- Nephritis?
- Nephropathy
Blood pressure:
- Hypertension?
What bloods can be taken to investigate a cause for CKD?
What would these be looking for?
HbA1c: ?diabetes
What imaging can be used to investigate the cause of CKD?
What does it look for?
Renal USS: structural abnormalities and tumours
What special tests can be performed to investigate the cause of CKD?
What does this consist of?
Renal screen:
- PSA (prostate issues?)
- Protein electrophoresis/ serum light chains (myeloma?)
- ANA and complement (vasculitis?)
- MPO/PR3
- Anti GBM
- Blood borne viruses: Hepatitis and HIV
Renal histology:
- Biopsy to confirm other investigations
What are the functions of the kidney?
- *A:** Acid-base balance
- *W:** Water removal
- *E:** Erythropoietin production
- *T:** Toxin removal
- *B:** Blood pressure control
- *E:** Electrolyte balance
- *D:** Vitamin D activation
What signs and symptoms of impaired water removal by the kidneys?
What are the approaches to management of this?
Signs:
- Peripheral oedema
- Pulmonary oedema
Symptoms:
- Dyspnoea
- Swelling
- Nocturia
Management:
- Fluid restriction
- Diuretics
- Renal replacement therapy
What are the signs and symptoms of impaired toxin removal by the kidneys? (Uraemia)
What investigations can be conducted to confirm this?
What are the management strategies?
Symptoms:
- Nausea
- Vomiting
- Hiccups
- Neuropathy
- Pruritis
- Malaise
Signs:
- Encephalopathy
- Pericarditis
- Bleeding tendency
Investigations: U&Es
Management:
- Renal replacement therapy
What are the signs and symptoms of impaired blood pressure control by the kidneys?
What investigations can be conducted?
What are the management strategies?
Signs:
- Hypertensive urgency
Symptoms:
- Headache
- Visual disturbance
Investigations: BP monitoring
Management:
- Antihypertensives
- Renal replacement therapy
What are the signs and symptoms of impaired acid-base balance by the kidneys?
What investgations can be conducted for this?
What are the management strategies?
Signs: N/A
Symptoms:
- Anorexia
- Lethargy
Investigations:
- pH and bicarbonate
Management:
- PO or IV sodium bicarbonate
- Renal replacement therapy
What are the signs and symptoms of impaired erythropoietin production by the kidneys?
What investigations can be conducted for this?
What are the management strategies?
Symptoms:
- Dyspnoea
- Chest pain
- Lethargy
Signs:
- Pallor
Investigations:
- FBC
Management:
- EPO replacement
- Blood transfusion
What are the signs and symptoms of impaired electrolye balance by the kidneys? (Hyperkalaemia)
What investigations can be conducted for this?
What are the management strategies?
Signs:
- Pulse: irregularly irregular
Symptoms:
- Palpitations
Investigations:
- ECG
- U&Es
Management:
- Low potassium diet
- Renal replacement therapy
What are the signs and symptoms of impaired vitamin D activation by the kidneys?
What investigations can be conducted for this?
What are the management strategies?
Signs:
- Osteomalacia
- High phosphate
- Hypocalcaemia
Symptoms:
- Aches and pains
- Bone deformities
- Fractures
Investigations:
- Calcium
- Phosphate
- Vitamin D
- Parathyroid hormone
Management:
- Phosphate binders
- Calcium replacement
- Vitamin D replacement
- Calcitonin
What are the complications of CKD?
What investigations can be used to confirm each?
BP check: Hypertension
Fundoscopy: Hypertensive retinopathy
ECG: arrhythmias
U&Es: GFR severity, uraemia, hyperkalaemia
FBC: anaemia
Clotting: uraemia
Bicarb and pH: acid-base balance
X-ray: fractures/ osteomalacia
What foods should be avoided in a low potassium diet?
- Bananas
- Coffee
- Apricots
- Potatoes
- Kiwis
- Avocados
Name 3 types of renal replacement therapy
Haemodialysis
Peritoneal dialysis
Renal transplant
What are the advantages and disadvantages of haemodialysis?
Advantages:
- Bridge
- Quick to set up
- Routine
Disadvantages:
- Fistula
- Invasive
- Regular appointments
- Infections
What are the advantages and disadvantages of peritoneal dialysis?
Advantages:
- Home
- Flexible
- Less invasive
- Can be done overnight
Disadvantages:
- Storage
- Time
- Dexterity
- Surgical insertion
- Infections
What are the advantages and disadvantages of renal transplant?
Advantages:
- Independence
- No dialysis
Disadvantages:
- Immunosuppression for life
- Surgery risk
- May be difficult to find a match
- Rejection risk
- Follow up
Describe stage 1 of CKD
Stage 1:
- Kidney damage with normal kidney function
- eGFR >90
- 90-100% of kidney function intact
Describe stage 2 of CKD
Kidney damage with mild loss of kidney function
60-89% of renal function intact
eGFR 60-89
Describe stage 3a of CKD
Mild to moderate loss of kidney function
eGFR 59-45
45-59% of renal function intact
Describe stage 3b of CKD
Moderate to severe loss of kidney function
eGFR 30-44
30-44% renal function intact
Describe stage 4 of CKD
Severe loss of kidney function
eGFR 15-29
15-29% of kidney function intact
Describe stage 5 of CKD
Renal failure
eGFR less than 15
Less than 15% renal function intact