Clinical Decision Support System

They also help in determining the presence of pathogens in the body.
The difference in the proportion of various vital metabolites and constituents in the blood help in identifying the presence of various ailments of the body. The analysis is usually performed by comparing the amount of various chemical entities present in the blood under test to the standard ratio of one or more chemical entities that are actually supposed to be present in the blood. This sample is usually extracted from a vein in the arm using a needle or via a finger-prick. The regulation of the internal body temperature despite the changes in the outside atmosphere is particularly important in the warm blooded animals. Other than this the blood being the only liquid majorly circulating in the body also performs the important hydraulic functions. Presence of various harmful chemicals, poison and even drugs can be determined through the blood test. Blood tests are mainly used to determine physiological and biochemical states, such as disease, mineral content, drug effectiveness, and organ function. Blood test is an important laboratory analysis performed on a blood sample. It is therefore important that the reports of the blood test and the lab test results are properly understood by the patient so that he/she has a clear understanding of the ailment of the body.Differences in the quantities and proportions are determined. It also performs many regulatory functions like the regulation of body pH of the body and also the regulation of core body temperature.

Or, they can explain why you've been "feeling off" for the last few months.
Getting blood taken can be scary for those who've never done it, especially children. It can tell you hundreds of things about your lifestyle and habits. Often you're done in less than five minutes.
What Can Blood Tests Detect? The reasons for getting your blood tested vary. Usually, the technician, nurse, or doctor will have you sit down on a chair with your feet on the ground.
This might seem scary, but it's quite straightforward. That's why doctors encourage their patients to get routine blood work done.
By analyzing the blood, scientists can detect illnesses before it's too late. You likely have lots of questions about the process and results.
A routine blood test consists of getting blood taken at your doctor's office or at a lab. Blood can tell you about your organ function, diet, metabolism, illnesses, and if you have certain diseases. In a routine blood test, it might just be to check that nothing has changed since your last healthy test result.