Oliguria Flashcards
What is the most common composition of kidney stones
Calcium oxalate
Give some of the compositions of kidney stones
Calcium oxalate, calcium phosphate, struvite, uric acid
What are staghorn kidney stones
Stones which fill numerous major and minor calices
What size diameter of kidney stones have a 95% chance of being passed
5 mm
What are the risk factors of kidney stones
Middle aged
Caucasian/Indian
Male
Diet high in meat and salt
How will patients present with kidney stones
Renal colic
What are the management options for renal stones
Conservative - let the stone pass on its own
Non-invasive - fragment the stone
Invasive
How can kidney stones cause pyelonephritis
They block the flow of urine making the likelihood of an infection greater
Name 2 inhibitors of kidney stone formation
GAGs
Tamm Horsfall protein
What type of catheterisation may be done is there are problems
Supra-pubic
When might suprapubic catheterisation be carried out
Prostrate problems, clots, masses, prolapse
What are some causes of haematuria
Obstruction - bladder cancer, stone, inflammation, BPH
Sickle cell anaemia
Glomerular disease - IgA nephropathy, vasculitis, glomerulonephritis
How can haematuria be detected
Visibly
Non-visible by microscopy or dipstick test
What is the difference in presentation of acute and chronic urinary retention
Acute = Painful Chronic = not painful
What is the consequences of acute urinary retention
There is a high pressure system causing urine to back up to the kidneys causing a change in the medullary concentration gradient leading to renal failure