Module 1: Principles of Medical Laboratory Science Practice – Unit 1 & Unit 2 Notes
UNIT 1: MEDICAL LABORATORY SCIENCE: THEN AND NOW
Context and public awareness: COVID-19 coverage highlighted the role of Medical Laboratory Science (MLS) professionals in specimen collection and molecular testing (e.g., RT-PCR) and the use of protective equipment (e.g., full-body, air-supplied positive pressure suit).
Terminology in the Philippines vs. international usage:
In the Philippines, the profession is often referred to as Medical Technology.
In international settings, terms include Clinical Laboratory Science, Biomedical Laboratory Science, and Laboratory Medicine.
Task prompt (Engage): List at least five tasks performed by a medical laboratory scientist/medical technologist.
Key purpose of the profession: to aid physicians in diagnosis, study, and treatment of disease and promotion of health through laboratory analyses and procedures.
What is Medical Technology / MLS? Core definitions
In the Philippines, the practice of Medical Technology is defined by Republic Act (R.A.) No. 5527, the Philippine Medical Technology Act of 1969. It defines the practice as an auxiliary branch of medicine dealing with examinations using various chemical, microscopic, bacteriologic, and other medical laboratory procedures or techniques that aid the physician in diagnosis, study, and treatment of disease and in the promotion of health in general.
Early definitions of Medical Technology (for historical context):
Fagelson (1961): Branch of medicine concerned with laboratory determinations and analyses used in diagnosis and treatment of disease and health maintenance.
Walters (1966): Health profession performing laboratory analyses to obtain information necessary for diagnosis and treatment and health maintenance.
Heinemann (1963): Application of natural, physical, and biological sciences in laboratory procedures to aid diagnosis and treatment.
Formalization via RA 5527: RA 5527 requires the registration of medical technologists and defines their practices and other purposes.
Explore: Practice of Medical Technology (RA 5527, Section 2)
A person is deemed to be in the practice of medical technology when, for a fee or compensation, they provide professional services to aid the physician in diagnosis, study, and treatment, including (1) Examination of tissues, secretions, excretions, and body fluids by various laboratory procedures (manual or automated); (2) Blood banking procedures; (3) Parasitologic, mycologic and microbiologic procedures; (4) Histopathologic and cytotechnology; (5) Clinical research involving patients/humans; (6) Preparation and standardization of reagents, standards, stains (exclusively for the lab use); (7) Clinical laboratory quality control; (8) Collection and preservation of specimens.
Conventional practice settings: clinical laboratories, blood banks, and anatomic laboratories; intimate integration with molecular biology laboratories for nucleic acid amplification tests and DNA-based assays.
Roles of the Medical Laboratory Worker / Medical Technologist (from RA 5527 context):
A. Medical Technologist: primary laboratory professional performing in clinical laboratories under supervision of a pathologist or licensed physician where no pathologist is available.
B. Pathologist: duly registered physician trained in laboratory medicine and tissue/secretions study to diagnose disease and guide treatment.
C. Medical Laboratory Technician: assists MTs/pathologists; registered with the Board of Medical Technology.
D. Phlebotomist: trained to draw blood; phlebotomy is a core skill for MTs and increasingly for other practitioners with appropriate certification.
E. Blood Bank Technologists: specialized MTs in blood testing and preparation for transfusion.
F. Cytotechnologists: specialize in preparing and examining cellular slides for abnormalities.
G. Histotechnologists: specialize in preparing solid tissue samples for microscopic examination.
Roles in health care: MTs perform laboratory diagnostics, monitor treatments, aid in disease prevention and infection control, prepare safe blood products, and contribute to biomedical research.
Professional attitude and ethics: MTs are expected to adhere to high professional standards; conduct governed by the Medical Technology Code of Ethics (Philippines).
Explain: The Practice of Medical Technology (detailed sections)
The MT practice includes tissue, secretions, excretions, and body fluids analysis via various techniques (electronic, chemical, microscopic, bacteriologic, hematologic, serologic, immunologic, nuclear, etc.).
Blood banking and transfusion safety are core components.
Parasitologic, mycologic, and microbiologic procedures and techniques form foundational lab work.
Histopathology and cytotechnology are essential for tissue-based diagnosis.
Clinical research involving human subjects and the development/standardization of reagents, stains, and related materials for lab use.
Quality control and standardization as ongoing obligations of clinical laboratories.
The lab as a site for training and internship; the evolution toward molecular biology labs and DNA/RNA assays.
Elaborate: History of the Medical Technology Profession (timeline highlights)
Early beginnings (historical milestones):
Vivian Herrick traces MLS origins to as early as 1500 ext{ BC} with parasite records (e.g., Ebers Papyrus, parasitology descriptions).
Sushruta (600 ext{ BC}): diabetes described; madhumeha (honey urine) observation.
Hippocrates (300 ext{ BC}): four humors theory; proposed triad of drugs, surgery, and bloodletting; linked urine appearance to kidney disease.
Galen (180 ext{ AD}): described diabetes as “diarrhea of urine”; early urine-volume dynamics.
Medieval period (1098–1438): urine diagnosis by urinoscopy; urinalysis widely practiced; emphasis on examination of urine as diagnostic tool.
Alessandra Gillani (14th century): early laboratory tasks at University of Bologna; died of laboratory-acquired disease in 1326.
Onset of modern MLS and microbiology:
Marcello Malpighi: early microscopist; father of modern anatomic pathology; embryology and glandular physiology.
Rudolf Virchow: father of microscopic pathology; established first pathology laboratory; emphasized cellular-level disease study.
Von Ziemssen (1886): established first hospital-attached clinical laboratory in Munich with integrated departments.
Medical technology in the United States (foundational development):
Massachusetts General Hospital (MassGen, 1847): chemist-microscopist duties; early hospital laboratory roles.
1854–1855: John Bacon Jr. and then Dr. Calvin Ellis; microscopist vs. chemist differentiation; microscope-driven diagnosis.
William Welch (1878): opened teaching laboratory at Bellevue; first pathology course in a U.S. medical school; Johns Hopkins affiliation.
1895–1903: development of clinical laboratories at Johns Hopkins, University of Pennsylvania (Pepper Laboratory, 1895), University of Michigan, Rockefeller Institute, and key textbooks (Todd/ Henry).
1915: Pennsylvania law requiring complete hospital laboratory facilities with full-time technicians; professional recognition growth.
World War I era: high demand for technicians; women recruited for lab work; training expansion.
1918–1920: calls for national certification and professional organization formation; ASCP founded in 1922; ethical codes for lab personnel.
1923: University of Minnesota builds first degree program in medical technology; licensure movement begins in the 1950s.
Medical Technology in the Philippines (historical progression):
1944–1945: U.S. military presence; 26th Medical Laboratory (Manila) established; first clinical lab in the Philippines as Manila Public Health Laboratory; one-year tech training for high school graduates.
1945–1947: transition of training to national health structures; formal syllabi and training programs introduced.
1954: Philippine Union College and Manila Sanitarium Hospital offer the first four-year Bachelor of Science in Medical Technology program; founders credited include Dr. Willa Hilgert Hedrick (founder of MT education in the Philippines) and Dr. Reuben Magsaysay.
1957: University of Santo Tomas begins MT program (elective then formalized); 1961: UST MT recognized as official program with internship in year four.
1960s: Centro Escolar University and Far Eastern University start MT programs; Saint Louis University begins B.S. in Medical Technology (1966); Imelda R. Marcos Clinical Laboratory at SLU opens in 1970–1971 for MT interns; MECS recognition in 1971.
1970s: formalization of MT education and board structures; expansion of MT practice in the Philippines.
In-Depth: Module 1 – Key content elements and structure
Module contents include: Introduction to the Profession; Self-Monitoring Form; Unit objectives; Unit 1: Then and Now; Unit 2: National and International Setting; quizzes; references.
Unit 1 objectives (summarized):
Characterize the nature of MLS/Medical Technology.
Enumerate historical events/figures contributing to MLS development.
Describe the modern profession and its impact on health care and society.
Unit 1 core activities in the module are organized as: Engage, Explore, Explain, Elaborate, Evaluate.
Unit 2 objectives (summarized):
Identify and characterize national bodies relevant to MLS practice.
Identify and characterize international bodies overseeing MLS.
Unit 2: The Medical Technologist in the National and International Setting
National bodies and their roles (overview):
PAMET: Philippine Association of Medical Technologists; the lone accredited professional organization (APO) for Filipino MTs; advocates for the profession and public awareness; guides standards and ethics.
PAMET logo and symbolism: circle (continuous involvement of practice and education); triangle (trilogy of love, respect, integrity); green color (health); microscope and snake (science and profession); year 1963 (establishment).
PAMET core values: Excellence, Professionalism, Commitment, Unity.
PAMET presidents (highlights):
1963–1967 Charlemagne T. Tamondong: Emergence of the profession; public acceptance.
1967–1970 Nardito D. Moraleta: Professional recognition; RA 5527 approval.
1970–1971, 1973–1977 Felix E. Asprer: Legislative agenda; PD 498 amendments; MT board exam recognition by PRC.
1971–1973 Bernardo T. Tabaosares: Practice enhancement; salary revisions; professional celebration period.
1973 Angelina R. Jose: Career advocacy; upgrading professional code.
1977–1982 Venerable C.V. Oca; educational enhancement; continuing professional education (CPE); community services.
1982–1992 Carmencita P. Acedera; salary standardization; CPE emphasis; interschool activities.
1992–1996 Marilyn R. Atienza; closer PAMET–PASMETH coordination; journal recognition (ISIS/ISSN).
1997–2001 Norma N. Chang; international leadership; international scholarly activities.
2001–2002; 2005–2006 Agnes B. Medenilla; organizational dynamism; job fairs; research funding.
2006–2013 Leila M. Florento; continuing collaboration with industry; expanding competence sustenance.
2013–2015 Romeo Joseph J. Ignacio; visibility and integrity initiatives; V.O.I.C.E. program.
2015–Present Ronaldo E. Puno; empowerment for global advancement.
PASMETH: Philippine Association of Schools of Medical Technology and Public Health; national organization of MT/hygiene education; aims to maintain high standards in MT and public health education; history includes leadership formation in 1970 and SEC registration in 1989; current president: Dean Bernard Ebuen.
PHISMETS: Philippine Society of Medical Technology Students; organized in 2002; reorganized in 2006 under PASMETH; aims to foster camaraderie, culture, community outreach, and leadership training.
International bodies and their relevance to MLS:
CLSI (formerly NCCLS): not-for-profit body developing clinical laboratory testing standards/guidelines; common publications include M100 (antimicrobial susceptibility), GP41 (collection of diagnostic venous blood specimens), GP48 (phlebotomy training program elements), QMS01 (quality management system for laboratories).
ASCP: American Society for Clinical Pathology; certification for generalist and specialist MT professionals; global certification; advocacy for pathologists and lab personnel.
NIST: National Institute of Standards and Technology; promotes measurement science and standards; role in calibration standards for glassware and balances; certifies Class A glassware and related calibration standards.
ISO: International Organization for Standardization; develops international standards (ISO 9001 for quality management; ISO 15189 for medical laboratories quality and competence).
Joint Commission (JCAHO/JCAH): certifies health care organizations and programs in the US; accreditation emphasis for quality of patient care.
CAP (College of American Pathologists): accreditation services for labs under ISO 15189; uses CAP accreditation checklists (common and discipline-specific).
AABB: standards in transfusion medicine and cellular therapies; global leader in transfusion safety and cellular therapy standards.
CDC: Centers for Disease Control and Prevention; biosafety/biosecurity standards; co-author of Biosafety in Microbiological and Biomedical Laboratories; sets public health guidance.
Practical Laboratory Profession Implications (from the module content)
The MT profession spans clinical chemistry, hematology, serology, microbiology, clinical microscopy, and parasitology; newer molecular biology labs have been added to include nucleic acid amplification tests and DNA-based assays.
The MT practice has broad roles: diagnostic testing, monitoring treatment responses, disease prevention and infection control, safe preparation of blood products, and participation in biomedical research.
Professional conduct is defined by a code of ethics that emphasizes responsibility, legality, fairness, confidentiality, integrity, and collaboration with colleagues; breaches are reportable to appropriate authorities or ethics committees.
Healthcare waste management and biosafety are critical to safe practice within the clinical laboratory environment.
Cross-Reference: Module Structure and Assessments
Module 1 includes Unit 1 (Then and Now) and Unit 2 (National/International setting) with engage/explore/explain/elaborate/evaluate sections.
Quizzes: Unit 1 Quiz and Unit 2 Quiz assess comprehension; there are also crossword activities meant to reinforce terminology and key concepts.
For students in different formats (CBL vs. OBL), there are specified assessment steps (e.g., Unit 1 Quiz; Unit 2 Quiz) and instructions.
Key References within the Module
Suba, S., & Florida, J. (2014). Introduction to Medical Technology with Science, Technology, and Society. Pasig: Cengage Learning Asia Pte Ltd.
Cardona, C., Garcia-Meim, R., & Martin, G. (2015). Introduction to Medical Technology Practice in the Philippine Setting. Quezon City: C&E Publishing, Inc.
Benitez, P., Dumaoal, O., Estrella, F., & Mortel, F., Nava, M.R. (2019). Principles of Medical Laboratory Science 1. Quezon City: C&E Publishing, Inc.
Sunderman Sr., F.W. (1993). Evolution of Clinical Science: An Overview. Annals of Clinical and Laboratory Science, 23(4), 231-248.
Turgeon, M. (2020). Linne & Ringsrud’s Clinical Laboratory Science. St. Louis: Elsevier
Notable numeric references and dates (for quick timeline reference)
First clinical laboratory in the Philippines (Manila Public Health Laboratory) established during US WWII era: 1944
Formal MT education in the Philippines begins with a four-year BS MT program at the Philippine Union College in 1954
UST MT program recognized as official in 1961; SLU MT program started in 1966; Imelda R. Marcos Clinical Laboratory opened in 1970-1971 for MT interns; MECS recognition in 1971
PAMET established in 1963; first national convention and officer election on September 20, 1964; ongoing leadership milestones through 2015 and beyond
ISO/ISO 15189 and ISO 9001 standards are referenced in the international accreditation context
CLIS and ASCP: ongoing roles in standards and certification
Quick recap of core ideas
MLS/Medical Technology is an MLS-profession that supports diagnosis, treatment, and health promotion via laboratory analyses across multiple disciplines.
RA 5527 defines practice, scope, and professional governance in the Philippines; the profession includes MTs, pathologists, technicians, phlebotomists, cytotechnologists, histotechnologists, and blood bank professionals.
The profession has a rich historical lineage from ancient medicine to modern molecular laboratories, with a strong emphasis on quality control, ethics, professional standards, and international collaboration.
National bodies (PAMET, PASMETH, PHISMETS) and international bodies (CLSI, ASCP, ISO, CAP, AABB, CDC, NIST) shape education, practice standards, accreditation, and safety in MLS.
Ongoing themes: ethics, professional development, occupational safety, biosafety, and the translation of laboratory work into patient care and public health outcomes.
If you want, I can condense this into a shorter study guide with only the most essential points or expand any particular section into a more detailed sub-notes block (e.g., a deeper timeline, or a full glossary of terms).