urine concentration test

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urine concentration test

Concentrating ability test Urology Any test in which the osmolality of the urine is measured after fluid restriction; the ability to concentrate urine indicates adequacy of both renal and endocrine function; the responsible hormone is vasopressin–ADH. See Water deprivation test.


1. an examination or trial.
2. a significant chemical reaction.
3. a reagent. See also under specific names of tests.

cis-trans test
used in microbial genetics to determine whether two mutations that have the phenotypic effect, in a haploid cell or a cell with single phage infection, are located in the same gene or in different genes; the test depends on the independent behavior of two alleles of a gene in a diploid cell or in a cell infected with two phages carrying different alleles.
critical titer test
the titer of a test at which the patient is judged to have reacted positively to the test.
diazo test
a group of tests for bilirubin conjugates in urine and therefore suitable for the detection of biliary and hepatic disease. Based on the combination of bilirubin with a stable diazonium compound.
exact test
a statistical test based on the exact distribution of the data under the null hypothesis, rather than on a normal approximation.
hypothesis test
the method by which a hypothesis is judged.
sodium sulfanilate clearance test
test station
set up by the government or a cooperative organization for the purpose of testing individual livestock provided by farmers for productivity in terms of egg production, milk yield, weight gain. The feeding and measurement are under the control of the station.
statistical test
used to decide between two hypotheses.
surrogate test
an indirect test, e.g. milk cell count.
tolerance test
1. an exercise test to determine the efficiency of the circulation.
2. determines the body's ability to metabolize a substance or to endure administration of a drug, e.g. insulin tolerance test.
triglyceride absorption test
see fat absorption test.
urine concentration test
see water deprivation test.
a dexamethasone suppression test followed by an ACTH response test; the name refers to the change in plasma cortisone levels, first depressed then elevated, which if plotted on a graph would form a V.


the fluid containing water and waste products which are secreted by the kidneys, stored in the bladder and discharged by way of the urethra. See also urinary.

urine albumin
urine alkalinization
increasing the pH of urine by the administration of alkalinizing agents such as sodium bicarbonate; used to increase the solubility of cystine in the management of cystine urolithiasis in dogs.
blood in urine
urine burn
see urine scald (below).
urine calculi
urine casts
see urinary casts.
urine cells
see urine sediment (below).
urine chromogens
urine concentration test
see water deprivation test.
urine creatine
urine crystals
urine drinking
in farm animals is observed in nutritional deficiency of sodium chloride.
urine flow
the rate of flow may be reduced—oliguria, absent—anuria, or increased—polyuria.
urine flowmetry
measure of urine flow rates.
urine glucose
urine hemoglobin
urine immunoglobulins
may be found in small amounts in normal animals. Increased amounts occur in renal disease due to disruption of glomeruli and defects in tubular reabsorption.
urine indican
urine ketones
urine marking
metastable urine
calcium oxalate crystals are maintained and can enlarge in urine oversaturated with these minerals.
urine methemoglobin
urine myoglobin
urine osmolality
a measure of the number of dissolved particles per unit of water in urine. See also osmolality.
oversaturated urine
calcium and oxalate crystals will spontaneously precipitate, grow and aggregate.
urine peritonitis
caused by the presence of urine in the peritoneal cavity as in rupture of the bladder.
urine pH
the normal range varies with the animal species. Herbivores have a higher pH than carnivores because of differences in the diet. Alterations occur with changes in acid-base balance and infection in the urinary tract.
urine protein
pus in urine
see pyuria.
red urine
residual urine
urine remaining in the bladder after urination; seen in bladder outlet obstruction (as by prostatic hypertrophy) and disorders affecting nerves controlling bladder function.
urine sample collection
midstream collection is standard; for culture the sample should be collected by catheter or suprapubic, percutaneous needle insertion into the bladder.
urine scald
scalding of the perineal area, and sometimes the hindlegs, by urine. It may be the result of urinary incontinence or the animal's inability to assume normal posture when urinating, i.e. paresis or paralysis of the hindlimbs. In rabbits it is caused by poor cage accommodation and frequent wetting of the area with urine. Secondary infection of the dermatitis is common.
urine sediment
a centrifuged deposit suitable for microscopic examination for the presence of cells, casts, bacteria, crystals, etc.
urine specific gravity
see specific gravity.
subcutaneous urine aggregation
urine leaking from a damaged urethra collects in a subcutaneous site.