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...Outline clinical biochemistry laboratory work flow cycle phlebotomy quality control the interpretation of results ass lec farah s j pm every analysis should attempts to answer a question which clinician has posed about patient obtaining correct can often seem be fraught with difficulty so there are three phases testing pre analytical test ordering specimen collection transport and processing post transmission follow up retesting following figure show circuit diagram process act drawing blood sample from vessel vein artery or capillary bed for lab transfusion chemistry is usually drawn typically in arm back hand collecting called venipuncture medical professional phlebotomist materials required selection site used collect by procedure on veins that median cubital located middle cephalic basilic both sides best choice because it good than basilica slower however if unsuccessful capital rarely special cases as when gases ph co o bicarbonate requested performed physicians...