blood samples and what doctors do with it


                     Blood samples for testing can be taken either from a vein which carries blood to the heart or from an artery which takes blood away from the heart. If only a few drops of blood are needed for monitoring blood sugar in diabetes, it is enough to make a blood with a
small prick in the tip of the finger and squeeze the blood out. Mostly the blood is taken from a vein, commonly around the elbow. First, the cord is tied around the upper arm to make the vein prominent. It may be tight but this makes easier to take the blood.

Sterilization


               The site of the injection is cleaned with spirit and then a needle is put into the vein. The needle will be attached either to a low-pressure blood test bottle or to a syringe where the plunger is pulled back to create low pressure. When the necessary amount of blood has been extracted, the needle is removed and a little ball of cotton wool is taken and kept over the site of injection. This should be pressed for one or two minutes before applying a sticking plaster.


Need for a blood sample


                To get accurate information for certain diseases like malaria, AIDS, etc., doctors need the blood and the technician will do several tests using the blood sample. These include measurements and a blood smear. A blood smear is a film of blood placed on a slide which helps the doctor to look individual cells under a microscope. The blood test is useful for



  • Counting red blood cells
  • Blood transfusion and cross matching 
  • Finding blood groups
  • thyroid function test
  • liver function test
  • measuring iron level
  • serum electrolytes


                In the lab, BLOOD GROUP is identified through various methods.

  • To identify A group blood - anti-A (blue in colour) is mixed with the blood taken from a patient. If any culms are seen on the blood then the group of blood is A group.


  • To identify B group blood - Anti B (yellow in colour) is mixed with the blood sample. If any culms seen in the blood, it belongs to the B group.


  • To identify O group blood - Anti O (white in colour) is mixed with the blood sample. If any culms are seen then the group is O group.

                Don't afraid for the syringe. The technician will take a required amount of blood from your body with no severe pain.

Comments

  1. A very successful way to treat tributary veins, spider veins or even superficial varicose veins, however often patients with the above also have saphenous vein reflux. If a patient has unsuccessful or recurrence after sclerotherapy an ultrasound should be performed by a vascular and vein specialists to determine if there is indeed a deeper problem. Great blog Spider Vein Removal NYC

    ReplyDelete

Post a Comment

Ads