Overview of Renal Diseases Flashcards
What are the functions of the kidneys?
Excretes waste substances Important for acid base balance Vitamin D activation BP control RBC production Helps regulate water balance Regulates mineral in ECF
How much fluid is filtered through the glomerulus in a day?
~2000 L of blood through glomeruli per day
How can we measure the efficiency of kidney function?
Blood tests - Creatinine - Formulae Urine output Elimination of radioisotypes
Name renal syndromes leading to kidney disease
Asymptomatic pneumonia Nephritic syndrome Acute kidney injury Chronic kidney disease Haematuria Nephrotic syndrome
Why is renal disease so significant?
A single disease can manifest in several different syndromes Accelerated hypertension Acute kidney injury Vasculitis Amyloidosis Lupus Diabetes mellitus Bacterial endocarditis IgA nephropathy Membranous nephropathy
Why are biopsy’s used to determine disease?
Kidney biopsy provides a histological description which is compatible with a clinical condition and then may direct specific treatments
What are the pre-renal causes of disease?
Hypovolemia
↓Perfusion
Drugs
What causes hypovolemia?
Haemorrhage
Diarrhoea/vomiting
What causes decreased perfusion to the kidneys?
Septic shock
Cardiac failure
Which drugs contribute to renal disease?
Angiotensin converting inhibitors (ACEi)
Non steroidal anti-inflammatory drugs
What are the intrinsic renal diseases?
Interstitial nephritis
Acute tubular necrosis
Glomerulonephritis
Systemic disease (glomerulus)
How are glomerular diseases identified?
urine analysis (blood & proteins)
Red cell casts
Glomerulus / dysmorphic erythrocytes
How is proteinuria measured?
Proteinuria quantified by:
Urine albumin : creatinine ratio
Urine protein : creatinine ratio
What post renal causes for kidney disease?
Acute Kidney Injury (AKI
Fluid retention
Hyperkalaemia
Explain the occurence of AKI
18% hospital admissions
20-30% of cases may be preventable