AsseyMethod: Photo Colorimetric
Abbrevation: Ph. - P
Sector: Biochemistry
SampleType: S
S.Vol: -
Transport: at RT
Storage: 7 days at 4-25,3 month at -20˚c
Test Name: Phosphorus
Normal Range: 4.5-7

This test is related to
Why get tested?

To evaluate the level of phosphate in your blood and to aid in the diagnosis of conditions known to cause abnormally high or low levels

When to get tested?

As a follow-up to an abnormal calcium concentration, if you have a kidney disorder or uncontrolled diabetes, if you are taking calcium or phosphate supplements or have a nutritional problem

Sample required?

A blood sample taken from a vein in your arm, or a fasting or timed urine collection (usually a 24-hour sample)

Test preparation needed?

Overnight fasting may be required for a blood sample; follow any instructions that you are given.


What is being tested?

The serum phosphate test measures the amount of inorganic phosphate in your blood plasma (the liquid part of blood).

In the body, phosphorus is combined with oxygen to form a variety of phosphates (PO4). Phosphates are vital for energy production, muscle and nerve function, and bone growth. They also play an important role as a buffer, helping to maintain the body’s acid-base balance. About 70% to 80% of the phosphates are combined with calcium to help form bones and teeth, about 10% are found in muscle, and about 1% is in nerve tissue. The rest is found within cells throughout the body, where it is mainly used to store energy; about 1% of total body phosphate is found within plasma.

Most phosphate in the body comes from dietary sources. A variety of foods, such as beans, peas and nuts, cereals, dairy products, eggs, beef, chicken, and fish contain significant amounts of phosphate. The body maintains phosphate levels in the blood by regulating how much it absorbs from the intestines and how much it excretes or conserves in the kidneys.

How is the sample collected for testing?

A blood sample is obtained by inserting a needle into a vein in the arm. If a timed urine sample is required, you will be asked to save all of your urine over a set time period (usually 24 hours).

Is any test preparation needed to ensure the quality of the sample?

Overnight fasting may be required for a blood sample; follow any instructions that you are given.