estimation of serum urea
TRANSCRIPT
OBJECTIVE
1. To estimate the concentration of urea in serum 2. To obtain experience in the use of kits
INTRODUCTON
Urea is nitrogen compound , formed almost solely in the liver
From the catabolism of amino acids and is the main excretion product of protein metabolism
INTRODUCTON The concentration
of urea in the blood serum represent mainly a balance between urea formation from protein catabolism and urea excretion by kidney .
INTRODUCTON If kidney fail ,
blood urea Conc. Increase to high level and toxic condition known as (Uremia ) will result .
In uremia , urea must be removed from the blood by clinical procedure called “Blood Dialysis “
INTRODUCTON
BLOOD UREA NITROGEN (BUN)Some time used as measurement of
serum urea
½ Mwt of Urea is Nitrogen Normal range Serum urea ( 20-40 ) mg/dlBUN ( 5- 25) mg/dl
SERUM UREA NORMALLY VARY DEPENDING ON : Age ( due to change kidney function ) Sex ( conc. are slightly higher in men ) Diet ( protein diet Urea )
ABNORMAL CONDITION Causes of high Serum urea 1. tissue protein catabolism (-ve N
balance) This occurs in :FeversWasting disease Thyrotoxicosis Diabetic coma After trauma or a major operation
ABNORMAL CONDITION 2. Excess breakdown of blood protein
LeukemiaRelease of leukocyte protein
GIT BleedingHb & plasma protein can
be released in to the gut
ABNORMAL CONDITION 3. Diminished excretion of urea
Pre-renalEg, -Shock-congestive heart failure-Sodium depletion -Addison’s disease
Renal disease Eg,
Acute Glomerulonephritis Chronic heart failure
Sever destructive renal diseaseAcute renal failure
Hepatorenal syndrom
Post-renal ABBEg,
-Enlarge prostateGland
- Stone
Azotemia :- Is a term used for a high blood serum urea concentration
Uraemia :- ( as opposed to Azotemia) Is the name given to the clinical syndrom that
develops when there is nitrogen retention due to renal failure