Phlebotomy is the process of collecting blood samples from patients for diagnostic testing and treatment purposes. It requires specialized skills and knowledge of anatomy, the circulatory system, and effective communication. A phlebotomist must be able to perform venipuncture accurately and safely handle various types of blood collection tubes and equipment. Drawing blood can present challenges with different patient populations, so a phlebotomist must be prepared to address issues that may arise.
Phlebotomy for Medical Laboratory Professionals Ravi Kumudesh
SELECTING SITES
Antecubital area most often accessed
Hand or wrist
Remember: 2 arms
Use tip of index finger on non-dominant hand to palpate area to feel for the vein
COLLECTION SITE PROBLEMS
Indwelling lines:
Hickman catheters
Heparin locks
Used to administer medication
Only nurse may access these lines
Can obtain blood: called a ‘line draw’
Must clear line of heparin contamination by discarding first 5-10 cc of blood
Phlebotomy for Medical Laboratory Professionals Ravi Kumudesh
SELECTING SITES
Antecubital area most often accessed
Hand or wrist
Remember: 2 arms
Use tip of index finger on non-dominant hand to palpate area to feel for the vein
COLLECTION SITE PROBLEMS
Indwelling lines:
Hickman catheters
Heparin locks
Used to administer medication
Only nurse may access these lines
Can obtain blood: called a ‘line draw’
Must clear line of heparin contamination by discarding first 5-10 cc of blood
A brief presentation for second-year students in Iraqi Technical Institutes (studying Medical Laboratory Technology). This introduction covers the types of blood samples, how to collect these samples, common sites for collection, and anticoagulants in a test-tubes.
Upon completion of this chapter, you should be able to:
List the information required on a requisition form.
Describe computer use in phlebotomy.
Describe the supplies and general equipment required for phlebotomy.
Describe the components of the evacuated tube system.
Explain the proper method for needle disposal.
All about blood collection and handling, lecture notes to Medical Laboratory Students at Medical Laboratory Technology, Middle Technical University, Baqubah, Iraq
A brief presentation for second-year students in Iraqi Technical Institutes (studying Medical Laboratory Technology). This introduction covers the types of blood samples, how to collect these samples, common sites for collection, and anticoagulants in a test-tubes.
Upon completion of this chapter, you should be able to:
List the information required on a requisition form.
Describe computer use in phlebotomy.
Describe the supplies and general equipment required for phlebotomy.
Describe the components of the evacuated tube system.
Explain the proper method for needle disposal.
All about blood collection and handling, lecture notes to Medical Laboratory Students at Medical Laboratory Technology, Middle Technical University, Baqubah, Iraq
Clinical labs are important in diseases diagnosis, determination its severity and patient response to specific treatment. Diagnosis of any disease is first done by physical examination by physician and confirmed by lab diagnostic tests.
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
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- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
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Anti ulcer drugs and their Advance pharmacology ||
Anti-ulcer drugs are medications used to prevent and treat ulcers in the stomach and upper part of the small intestine (duodenal ulcers). These ulcers are often caused by an imbalance between stomach acid and the mucosal lining, which protects the stomach lining.
||Scope: Overview of various classes of anti-ulcer drugs, their mechanisms of action, indications, side effects, and clinical considerations.
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2. Phlebotomy What does it mean? Process of collecting blood Dates back to ancient Egypt Bloodletting-”bad” blood Greek translation Phlebos- vein Tome –incision
3. Why collect blood? Diagnosis and treatment of disease Therapeutic purposes Blood donation
5. Phlebotomists Role Perform venipuncture accurately and efficiently Reliable test results Provide quality care Patient safety and confidentiality Phlebotomist safety (PPE)
6. Circulatory System Knowledge of the anatomy and physiology important for safe venipuncture Blood forms in the bone marrow Blood transports oxygen and nutrients throughout the body and removes carbon dioxide Capillaries connect arteries to veins
7. Circulatory System Cont’dArteries and Veins Arteries Carry oxygenated blood away from the heart Pulse Thick walls No Valves Veins Carry deoxygenated blood to the heart No pulse Thin elastic walls Valves
8. More Circulatory Facts Our bodies contain approximately 6 liters of blood 45% “formed elements” (erythrocytes, leukocytes, and Thrombocytes) 55% liquid ”plasma” (a fluid allowing blood cells, electrolytes, proteins etc to travel the body via blood vessels).
9. Important Terms Fibrinogen –substance in blood Converted by the blood clotting process to fibrin Fibrin- “sticky” web like substance –traps the formed elements-result is a “blood clot” Serum- clear liquid portion of blood extracted from the “blood clot” used for many tests
10. Important Terms Centrifuge- machine which spins blood separating the RBC from the serum Anticoagulant-used to prevent blood from clotting. Found in certain blood tubes Buffy coat-layer separating plasma from RB
11. Serum Blood Collection Diagnostic tests are most commonly performed on Serum, plasma, and whole blood Serum tests use a “serum separator” tube containing thixotropic gel Invert tube after draw in order to activate clotting Tube must be centrifuged after clot has formed
12. Plasma and Whole Blood Plasma and whole blood Tube must be inverted after drawing to mix additives Tube must be centrifuged Certain Serum, Plasma, and Whole blood specimens will require special treatment and/or transport to laboratory.
13. Phlebotomy Sites Order of Draw by sites Arm-Antecubital Space includes Median cubital Cephalic Basilic Veins in hand Veins in feet
15. Arteries of Arm Note locations of arteries in the arm. You DO NOT want to draw from an artery Brachial Radial Ulnar How can you distinguish an artery from a vein?
17. Evacuated Tube Method This method includes: Vacutainer tube Adapter Double-pointed Needle Features of this method are: Closed system - needle stick risk low Vacuum draws blood inside the tube Safety needles meet OSHA guidelines
18. Equipment/Supplies Needed Physician order and Lab requisition form Pen –black ink Appropriate PPE (gloves, gown, goggles) Needle holder and Needle (varying sizes) Tubes –varying sizes and types used
19. More Equipment/Supplies Tourniquet or blood pressure cuff Alcohol or Betadine Cotton balls or gauze-preferred Bandages or tape Note: always ask patient about allergies
21. Order of draw Why? Prevent carryover or contamination - Order may vary between laboratories. Basic order: Sterile- sterile specimens Light blue-sodium citrate Red or plain tubes no additives or gel SST –Serum separator tube (Red/Gray, Yellow) Green –heparin Lavender-EDTA Gray –oxalate-fluoride
25. Good Therapeutic Communication People don’t like to have their blood drawn Use your therapeutic communication skills to: Put your patient at ease –show confidence Assess their comfort level Ask them about past experiences
26. Preparing the patient Identify yourself and explain the procedure Remember your “bedside manner” Properly Identify your patient ask them to: State their name For non-English speaking photo ID Note fasting or non-fasting
27. Preparing to draw Complete lab requisition and prepare labels Organize equipment and supplies Have spare tubes available
29. Preparing cont’d Do Not draw from a resistant patient Do Not draw if you are not comfortable Uncooperative children must receive special care and be restrained for safety Note any allergies to latex, alcohol, or tape
30. The Draw Position your patient for safety: sit lie down (note past history of fainting or loss of consciousness) Select the appropriate site and vein free of: Scars Hematomas A Pulse
31. The Tourniquet To prevent inaccurate blood test results-do not leave on longer than one minute Tourniquet may be applied over clothing for patient comfort Remove tourniquet when blood flow is achieved or prior to inserting last tube Always remove tourniquet prior to removing needle.
32. Proper completion of draw Remove tourniquet Remove needle and apply safety device while Applying pressure to site (patient can assist) Bandage appropriately Tend to the safety of your patient Label specimen tubes in front of patient
33. Important Information If you haven’t succeeded in getting blood after 2 tries ask someone else to try If no blood appears after inserting needle-pull needle back or change position before withdrawing Tubes must be filled to appropriate levels for accurate test results
34. Factors Affecting Lab Results Blood Alcohol-elevate results Diurnal rhythm-RX or daily activity level Exercise-runner’s anemia, change results Fasting-inaccurate results Hemolysis-destroys RBC’s Heparin-incorrect use interferes with results Stress-Increase in WBC’s Tourniquet on too long-dilution hemoconcentration
35. Challenging Patients Pediatric The child, parents or guardians Approach-explain –get down to their level Resistant-restraints ? Geriatric Physical-skin, hearing or vision impaired Effects of disease-stroke, arthritis, Parkinson’s –tremors, Dementia-Alzheimer's Safety issues-wheelchairs, balance
36. More Challenges Dialysis or Cancer patients -fistulas and shunts (AV-arteriovenous-permanent access for dialysis) Long-Term Care patients, Home Care, or Hospice Patients Traveling phlebotomists
37. Problem Sites Burns, Scars, Tattoos Damaged Veins (sclerosed-thrombosed) Edema-swelling due to abnormal accumulation of fluid Hematoma-swelling or mass of blood Mastectomy-caution lymph node removal Obesity
38. Complications or Conditions Allergies-adhesive, antiseptic, latex Excessive bleeding due to medications, hemophilia Fainting Nausea and vomiting Pain while drawing-what is normal –what is NOT-stopping the draw Seizures/Convulsions-stop draw immediately-get help
39. Thanks to: Clinical Medical Assisting: A professional, Field Smart Approach to the Workplace, Textbook and Workbook Phlebotomy Essentials 4th Edition Laurel Lunden, BS CMA (AAMA) January 2010