Acute renal failure
sudden shutdown of renal function following injury to the normal kidney. This
is a condition in which the kidneys are no longer able to maintain the normal
composition of the blood.
Loss of blood due to accidents and internal
hemorrhage. Ulcers can cause acute renal failure as the blood flow to the
Loss of plasma as in burns.
Inhalation or ingestion of poisons such as
carbon tetrachloride or mercury
Shock from surgery
Nephritis and Nephrosis can result in acute
Uremia - There is retention of urea and others
urinary constituents in the kidney.
Azotemia - accumulation of nitrogenous
constituents in the blood.
Oliguria - a scanty output of urine (less than
Anuria - minimal production or absence of urine
(less than 100 ml per day).
Serum potassium levels are high when tissue
proteins are broken down to provide calories.
There is increased phosphate and sulphate with
decreased sodium, calcium and base bicarbonate.
Patients are lethargic, anorexic, have nausea
of 600-1000 kcal is necessary. In the initial period when oral intake is less
due to vomiting and diarrhoea, 100 g per 24 hours intravenous glucose is given
to reduce protein catabolism.
Initially a protein free diet is used in the non-dialysed patients. In
the diuretic phase 20-40 g protein is given. The protein content of the diet
varies depending on the urea content of the blood.
A minimum of 100g per day is essential to minimize tissue protein
Fluid allowance is regulated in accordance with
urinary output. The total fluid permitted is 500 ml + losses through urine and
gastro intestinal tract. With visible perspiration an additional 500 ml may be
Sodium restriction is judged based on the sodium loss in the urine. For
the non-dialysed patient 500 to 1000 mg per day is given. Patients on dialysis
are permitted 1500 to 2000 mg per day.
Potassium allowance is based on serum levels.
Hyperkalemia (potassium intoxication) has deleterious effects on the heart.
Potassium sources like tomato juice, coffee, tea, cocoa are avoided.