What Is Anuria?
Anuria refers to a total urine output of less than 100 ml in 24 hours. It is found in patients with severe heart and kidney disease and shock. The standard of anuria in the oliguria phase of epidemic hemorrhagic fever is less than 50ml in 24 hours. The treatment is given according to the difference of the primary disease.
Basic Information
- English name
- Anuria
- Visiting department
- Nephrology
- Common locations
- Common causes
- Severe heart and kidney disease, shock
- Common symptoms
- 24 hours total urine output less than 100 ml
Causes of anuria and common diseases
- Divided into prerenal, renal and postrenal.
- Prerenal
- Shock, heart failure, dehydration, and other conditions that cause a decrease in effective blood volume can lead to insufficient glomerular filtration and anuria.
- 2. Renal
- Caused by various renal parenchymal lesions.
- 3. Postrenal
- Caused by urinary tract obstruction or dysuria due to stones, urinary tract stenosis, and tumor compression.
No urine test
- 1. 24-hour urine output for adults is less than 100ml;
- 2. Check auxiliary tests such as urine routine, blood routine, renal function, liver function, retrograde ureteral angiography, intravenous pyelography, and plasma albumin level;
- 3. If necessary, perform a renal biopsy to clarify the cause of anuria. If it is acute renal failure, temporarily treat with hemodialysis if necessary.
Differential diagnosis of anuria
- 1. Identification of concentration and reabsorption functions
- Differentiation between prerenal anuria and renal anuria: during prerenal anuria, the renal tubules remain intact for the function of concentrating and reabsorbing sodium, while renal tubular necrosis, renal tubule concentrating and reabsorbing functions decrease, so oliguria Accompanied by high urinary sodium 40mmol / L and hypotonic urine, but this is not absolute, there are also many prerenal clinical manifestations of concentrated hypernatremia.
- 2. Therapeutic identification
- Can be identified by two methods of fluid replacement and diuresis. For prerenal patients, urine volume and renal function will improve after fluid replacement, and urine output will increase after diuresis; while renal characteristics will not be relieved after fluid replacement, and the diuretic effect will not be strong. Post-renal urine routine results may include red blood cells and protein, and urinary color ultrasound indicates morphological changes in urinary tract obstruction.
Principles of anuria treatment
- Symptomatic treatment is given according to the differences of prerenal, renal and postrenal.