what is blood collection?
 • It is a process where blood is withdrawn from a 
  patient for medical investigation purposes. 
 • Why do we do this? 
 Blood is collected from patients for analyzing one of 
  the following: 
 1. Blood cell contents 
 2. Performing Microbiological tests 
 3. Performing biochemical tests 
 • What are the blood collection methods? 
 1. Arterial sampling.
 2. Venipuncture sampling.
 3. Fingerstick sampling.
        Arterial sampling 
 • It is when blood is collected from an artery mostly used in assessing 
  the pulmonary functions by testing the blood gas content.
 • Arterial blood collection is not performed widely. 
 • Note arterial blood is taken from the pelvis in case of infants. 
          Venipuncture sampling
 • Venipuncture sampling or phlebotomy  is the process of puncturing of a 
  vein in order to withdraw blood or introducing a fluid. 
 • Venous blood is useful for all types of biological and biochemical tests. 
 • Venipuncture is the most widely performed blood collection technique. 
      Fingerstick sampling
 • Fingerstick sampling or capillary blood collection 
  performed when small amounts of blood are 
  needed for medical analysis for example: blood 
  grouping test, random blood sugar test.. 
 • Note capillary blood is taken from the heel in case 
  of infants.