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Chapter 48. Collecting, Processing, and Testing Blood Specimens. PowerPoint® presentation to accompany: Medical Assisting Third Edition Booth, Whicker, Wyman, Pugh, Thompson. Learning Outcomes. 48.1 Discuss the composition and function of blood.
Collecting, Processing, and Testing Blood Specimens
PowerPoint® presentation to accompany:
Booth, Whicker, Wyman, Pugh, Thompson
48.1 Discuss the composition and function of blood.
48.2 Describe the process for collecting a blood specimen.
48.3 Explain the importance of confirming patients’ identities and correctly identifying blood samples.
48.4 Describe how to perform venipuncture and capillary puncture procedures.
48.5 Identify the equipment and supplies required for blood-drawing procedures.
48.6 Discuss the correct procedures for disposing of waste generated during blood-drawing procedures.
48.7 Discuss common fears and concerns of patients and how to ease these fears.
48.8 Develop techniques for helping patients with special needs, including children, the elderly, patients at risk for uncontrolled bleeding, and difficult patients.
48.9 Identify common blood tests and explain their purposes.
48.10 Perform certain blood tests.
ANSWER: The medical assistant will put the patient at ease during the procedure, process specimens, conduct testing, complete necessary paperwork, and make sure specimens are handled properly.
What are three functions of blood?
ANSWER: Functions of the blood are: (list any 3)
Distributes oxygen, nutrients, and hormones
Eliminates waste products
Attacks infecting pathogens
Maintains acid-base balance
Regulates body temperature
Not all states permit medical assistants to draw blood
Puncture of a vein
Most common sites are in the anticubital fossa and forearm
Common Sites for Venipuncture
Hold needle still
Hold pressure on siteafter removal of needle
Use non-latex gloves,tourniquet, and bandages
Clean site prior to venipuncture
May not be evident for several daysCollecting Blood Specimens (cont.)
What precautions should you take when collecting a blood specimen?
ANSWER: You should use Standard Precautions and appropriate personal protective equipment.
Difficult venipuncture – do not stick more than twice
Fainting patients –
Reaction to blood draw
Position to avoid injury
Angry or violent patients
Explain need for testing
Do not force patient
Document behavior and if patient refusesResponding to Patient Needs: Special Considerations (cont.)
What is one precaution you can take when drawing blood from a patient who is taking anticoagulants?
ANSWER: After drawing blood on a patient taking anticoagulants, you should hold a cotton ball over the puncture site for at least 5 minutes, monitor the site carefully, and notify the physician if bleeding does not stop.
Results aid in diagnosis
POLs often only perform waived tests
Know office policy
Enzyme-linked immunosorbent assay (ELISA)
Immunofloruescent antibody (IFA) test
Rapid screening tests
Helicobactor pyloriPerforming Common Blood Tests: Serologic Tests
___ Hemoglobin A1c A. ESR
___ Lysing RBCs / evaluating the color B. Serology test
___ Shape or form of objects C. Coagulation tests
___ Identify bleeding problems D. Chemical test
___ Rate at which RBCs fall E. Differential
___ Percentage of each type of WBC F. Morphology
___ ELISA G. Hemoglobin
End of Chapter 48