Comprehensive Notes — Principles of Medical Laboratory Science 1

Foundations of Medical Laboratory Science

• Course: Principles of Medical Laboratory Science 1

  • Lecturer: Dra. Keziah Nissi M. Alzate

• • What is Medical Technology?

    • Synonymous terms: • Clinical Laboratory Science • Medical Laboratory Science

    • Core activities

      • Collection, receipt, preparation, investigation & laboratory analysis of human biological materials (e.g., urine, feces, blood, sputum, cerebro-spinal fluid, peritoneal fluid)

    • Fields of application

      • Diagnostic & therapeutic use of sci-tech

      • Broad study & practice of diagnostic laboratory medicine

    The Medical Technologist (Medical Laboratory Scientist)

    • Workplace coverage

      • Blood Banking • Clinical Chemistry • Hematology • Immunology/Serology • Histology/Anatomical Pathology • Microbiology & Parasitology

    • Functional roles

      • Perform wide spectrum of tests (simple prenatal screens ⇒ complex disease work-ups)

      • Confirm accuracy & reliability of results

      • Report findings to pathologists & physicians → directly influence patient management

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    Global History of Medicine & Medical Technology

    Stone Age

    • Etiology: Diseases attributed to the unknown / evil spirits → foundation of superstitious beliefs

    • Therapeutic response: Prayers & rituals

    • Recorded procedures

      • Amputation

      • Circumcision

      • Castration

    Bronze Age

    • Healers = Priests / Exorcists

    • No anatomical knowledge; illnesses interpreted as “punishments from the Gods.”

    • Supernatural explanations dominate

    Iron Age (textual fragment)

    • Period marks gradual transition to empirical thinking (specific fragmented slide; keywords suggest metallurgical & cultural evolution)

    Classical Greek Contributions

    • Hippocrates (≈460-370 BC)

      • “Father of Medicine”

      • Authored the Hippocratic Oath → earliest Western medical ethics

    • Doctrine of the Four Humors (blood, phlegm, yellow bile, black bile)

      • $\text{Health} = \text{humoral equilibrium}$

      • $\text{Disease} = \uparrow \text{or} \downarrow \text{in one or more humors}$

      • Nature considered primary healing agent

    • Galen (129-200 AD)

      • Practiced under Aristotelian philosophy

      • Defined diabetes as “diarrhea of urine”

      • Comparative dissections on animals; described functional difference between arterial vs. venous blood → early circulation insight

    Early Documentary Traces of Medical Technology

    • Vivian Herrick

      • Traced roots of med-tech to $\text{≈1550 BC}$ (Ebers Papyrus)

      • Identified references to Taenia & Ascaris; noted 3-stage hookworm infection (cutaneous → pulmonary → intestinal)

    • Prof. M. Ruth Williams

      • Authored “An Introduction to the Profession of Medical Technology”

      • Highlighted urinalysis fad in Medieval Europe (1096-1438): “quacks” diagnosed diseases by urine appearance

      • Hindu physicians noted glycosuria (sweet urine attracting ants)

    • Anna Fagelson (14th cent.)

      • Proposed MT origin in 14th C; died of laboratory-acquired infection

• Alessandra Giliani (d. 1326)

  • First documented female engaged in anatomy & pathology (worked with Mondino de Liuzzi)

Evolution of Blood Transfusion

• $1492$ – Pope Innocent VIII: first (unsuccessful) human transfusion attempt

• $1631-1691$ – Richard Lower: performed animal-to-animal transfusion

• $1643-1704$ – Jean-Baptiste Denys: first fully documented animal→human transfusion

• $1829$ – James Blundell: first successful human→human transfusion

• William Harvey (1578-1657): discovered systemic blood circulation ⇒ theoretical basis

Microscopical & Immunological Milestones

• Anton van Leeuwenhoek

  • “Father of Microbiology”; handcrafted lenses (≈270×)

  • First to describe RBCs, protozoa; classified bacteria by shape (cocci, bacilli, spirilla)

• Marcello Malpighi

  • Founded microscopic anatomy & pathology; discovered capillaries bridging arteries & veins

• Edward Jenner (1798)

  • Developed world’s first vaccine (smallpox ↔ cowpox cross-immunity)

• Baron Karl Wilhelm von Humboldt (1815)

  • Led revolution in anatomical pathology & early bacteriology

• Jules Duboscq

  • 1854: built first visual colorimeter (Beer’s law) → entered clinical use by 1902

• Rudolf Virchow (1847)

  • Established archive of pathology; elucidated Trichinella spiralis life-cycle & pork-borne infection

Pioneers of Modern Medical Technology

• Joseph Lister

  • Father of antiseptic surgery; insisted on exclusion of bacteria from wounds → foundation of modern surgical asepsis

• Hermann Fehling (1848)

  • Devised first quantitative test for urinary glucose (Fehling’s solution)

• Louis Pasteur

  • Discovered principles of vaccination, fermentation & pasteurization; created rabies vaccine

• Emil von Behring

  • Isolated serum antitoxin (diphtheria → passive immunization)

• Wilhelm Conrad Röntgen

  • Discovered X-rays ⇒ birth of diagnostic radiology

• Aniline dyes (15th C) used to stain microbes; first visualization technique

• Karl Landsteiner (1900)

  • Father of ABO blood grouping & immunochemistry

Medicine in the Middle Ages

• Urinalysis: practiced, interpreted by appearance; therapeutic value unproven

• Herbal medicine widespread

• School of Salerno: first organized medical school in Europe

• Acupuncture: China’s efficacious modality

• Arabic science: optical advances ⇒ ophthalmology specialization

Scientific & Industrial Revolutions

• Scientific Revolution (“modern science”) – reliance on experiment & rational induction

• Industrial Revolution – mechanical devices & rapid technological innovation

18ᵗʰ–19ᵗʰ-Century Instrumentation

• Improvement of medical education; schools in Vienna, Edinburgh, Glasgow (Age of Enlightenment)

• Physiological devices

  • Spirometer

  • Sphygmomanometer

• Diagnostic instruments

  • Stethoscope (1816, Rene Laennec)

  • Ophthalmoscope (1850, Hermann von Helmholtz)

  • Laryngoscope (1855, Manuel Garcia)

  • X-ray apparatus (1895, Röntgen)

  • Compound microscope improved (Anton van Leeuwenhoek)

• Kenny Method (early 20ᵗʰ C)

  • Moist heat + gentle exercise to relieve muscle spasm; emphasized early passive/active movement → rehabilitation (notably in poliomyelitis)

Development of Medical Technology in the United States

• Dr. Silas Douglas (1844)

  • Founded first U.S. chemical lab (University of Michigan); promoted hands-on student practice

• Dr. William H. Welch (1878-1884)

  • Father of American Pathology

  • Opened first U.S. pathology lab (Bellevue Hospital, 1878) & became first pathology professor (Johns Hopkins, 1884)

• Dr. William Osler: established first clinical laboratory at Johns Hopkins Hospital; emphasized blood microscopy for malaria

• Dr. Simon Flexner: first Hopkins pathologist; advanced academic pathology

• Dr. James C. Todd

  • Authored “Manual of Clinical Diagnosis” → later “Clinical Diagnosis by Laboratory Methods”; became laboratory standard text

• $1915$ – Pennsylvania law: all hospitals must operate adequately equipped labs staffed by trained technicians

• $1923$ – University of Minnesota: among first MT training schools; offered degree-level program

• Era of Sophistication

  • 1923 – American Society of Clinical Pathologists (ASCP) organized

  • 1936 – American Medical Technologists (AMT) formed

  • 1950 – Standard MT curriculum formalized

  • 1975 – Bachelor’s degree (or equivalent) mandated for Medical Technologists

Evolution of Medical Technology in the Philippines

Spanish Colonial Period

• $1578$ – San Lazaro Hospital (leprosy care)

• $1556? / 1956$ – Hospital de San Juan de Dios; first PH laboratory

• $1887$ – Laboratorio Municipal de Manila (now Bureau of Science) → analyzed water, food & clinical specimens

American Regime

• $1908$ – University of the Philippines & College of Agriculture (Los Baños) established

• Bureau of Science became principal gov’t research & training lab; focus diseases: cholera, malaria, TB, leprosy, dengue, beriberi, diphtheria, amoebic dysentery

World War II & Post-war (≤1972)

• Government elevated health priority; Department of Health reorganized

• Major problems: schistosomiasis, malaria, malnutrition

Martial Law Era

• Creation of tertiary hospitals

  1. Philippine Heart Center

  2. Lung Center of the Philippines

  3. National Kidney & Transplant Institute

• Adoption of Primary Health Care System emphasizing promotive & preventive services

Aquino Administration

• Pivotal health laws

  1. Milk Code

  2. Generics Act of 1988 (RA 6675)

  3. Magna Carta of Public Health Workers (RA 7305)

  4. National Health Insurance Act of 1995 (RA 7875)

  5. Organ Donation Act (1991, RA 7170)

Ramos Administration

• EO 29: Established Philippine National AIDS Council

• National Blood Services Act of 1994 (RA 7719)

Birth of the First Philippine Laboratory

• WWII, Quiricada St., Sta. Cruz, Manila

  • 6ᵗʰ Infantry Division, U.S. Army

  • Called Manila Public Health Laboratory

• Dr. Alfredo Pio de Roda (Oct 1, 1945) organized the lab with Dr. Mariano Icasiano (Manila City Health Officer)

Training the First Filipino Medical Technicians

• $1947$ – Dr. de Roda & Dr. Prudencia Sta. Ana began training HS graduates (no set duration / certificate)

• $1954$ – Sta. Ana prepared official syllabus; 6-month training ⇒ certificate awarded

Formal MT Education

• Willa Hilgert Hedrick (1953) – founded MT education in PH

• Philippine Union College (PUC) (1954)

  • Now Adventist Univ. of the Philippines

  • Offered first 4-year BS Medical Technology in partnership with Manila Sanitarium (Adventist Medical Center)

• Dr. Jesse Umali (1956)

  • First MT graduate (PUC); became OB-GYNE & owner of Omega Laboratories

• University of Santo Tomas (UST)

  • 17 Jun 1957: decision to open MT course

  • Jun 1960: DOE temporary permit

  • 14 Jun 1961: full recognition of 4-year BS Medical Technology program

Professional Organization

• Philippine Association of Medical Technologists (PAMET)

  • Current President: Luella A. Vertucio

Ethical & Practical Implications

• Continuity from ancient ethical precepts (Hippocratic Oath) to modern codes (laboratory safety, donor screening)

• Emphasis on laboratory quality control, accuracy & patient safety (technologist’s role, legislation such as RA 7719)

• Evolution shows interplay of technological innovation, education, and health policy shaping modern laboratory practice

Key Numerical / Statistical References (LaTeX Format)

• Four Humors doctrine formalizes $\text{Health} \iff \Sigma<em>{i=1}^{4} H</em>i = \text{constant}$

• Timeline highlights

  • $1492$ first transfusion attempt

  • $1829$ first successful human transfusion

  • $1900$ Landsteiner’s ABO discovery

  • $1923$ ASCP formation, University of Minnesota MT program