What is this test?
This laboratory test is performed on a blood sample to measure the levels of phosphate in the blood. Phosphate plays an important role in building strong bones and teeth, and also helps in proper nerve functioning. Normally, only one percent of body phosphates are present in the blood.
Why is this test performed?
This test is performed:
- To help in the diagnosis of kidney diseases
- To help in the diagnosis of gastrointestinal disease
- To help in the diagnosis of liver diseases
- To help in the diagnosis of bone diseases
- To help in the diagnosis of parathyroid diseases.
- Which medicines might affect my test results?
- Vitamin D supplements
- Antacids
- Glucose IV
- What are the symptoms of low phosphate levels?
- Fatigue
- Muscle cramps
- Joint pain
- Loss of appetite
- Irregular breathing
- Irritability, anxiety, confusion
- Bone diseases
- What are the symptoms of high phosphate levels?
- Muscle cramps
- Bone and joint pain
- Weak bones
- Itching
- Rashes
- Numbness and tingling around the mouth
- What are the risks of this test?
Collecting blood from a vein is a very easy procedure and pose only minimum risk, including:
- Bruising
- Bleeding
- Infection
- Lightheadedness
- How to prepare for this test?
No special preparations are required for this test. However, inform your doctor about your complete medical and drug history before this test. Wear a short-sleeved shirt to aid the collection of sample.
Normal range: 2.5-4.5 mg/dL
Interpretation of test results:
Causes of low blood phosphate:
- Antacids
- Vitamin D deficiency
- Malnutrition
- Alcohol abuse
- Hypercalcemia
- Hyperparathyroidism
- Burns
Causes of high blood phosphate:
- Kidney disease
- Laxatives with phosphate
- Diabetic ketoacidosis
- Hypoparathyroidism
- Hypocalcaemia
- Liver disease