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A Brief History Of Medicine


A Brief History Of Medicine Part 4 Renaissance to early 1900 s – PowerPoint PPT presentation

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Title: A Brief History Of Medicine

A Brief History Of Medicine
Part 4 Renaissance to early 1900s
Throughout History
  • People have had illness.
  • People have tried to explain the cause of
  • Humans have sought cures for sicknesses.

The Renaissance
Time Period
  • 1300 AD to 1600 AD
  • Re-birth of knowledge

Major Advancements
  • 1543 Flemish Scholar Andreas Vesalius began to
    use human bodies for anatomy study
  • Wrote the first complete textbook on human
    anatomy "De Humani Corporis Fabrica", meaning
    "On the Fabric of the Human Body".

Major Advancements
  • Girolamo Fracastoro 1546
  • Theory of contagion
  • Said disease infection can be caused by minute
    bodies (germs) capable of self-replication,
    transmitted from infector to infected.

Major Advancements
  • The French army doctor Ambroise Paré, born in
    1510, revived the ancient Greek method of tying
    off blood vessels.
  • After amputation the common procedure was to
    cauterize the open end of the amputated appendage
    to stop the hemorrhaging. This was done by
    heating oil, water, or metal and touching it to
    the wound to seal off the blood vessels.

Major Advancements
  • Pare also believed in dressing wounds with clean
    bandages and ointments.
  • He was the first to design artificial hands and
    limbs for amputation patients. On one of the
    artificial hands, the two pairs of fingers could
    be moved for simple grabbing and releasing tasks
    and the hand look perfectly natural underneath a

Major Advancements
  • 1628, William Harvey explained the circulation of
    blood through the body in veins and arteries.
  • It was previously thought that blood was the
    product of food and was absorbed by muscle tissue.

William Harvey
  • The Heart is a pump it does not make blood (as
    most doctors thought)
  • Blood circulates around and through the body.

Microscope Used for Science
  • Antonie van Leeuwenhoek , 1670s
  • Dutch scientist
  • Improved microscope with smaller, superior
  • Actually invented in 1590 by Zacharius

  • Was actually studying various fabrics
  • First to observe bacteria 1676
  • Little beasties
  • Also observed protists and muscle fibers
  • Discovered blood cells

Marcello Malpighi
  • Italian physician biologist
  • Malpighi first to study blood with microscope in
  • Also studied skin, kidney liver tissues
  • Revolutionized the study of biology

Treatment Changed Little
  • Despite changes in knowledge, the major
    treatments were still
  • Bleed
  • Blister
  • Purge
  • Avoid sickness

Whos Who?
  • Physician university trained doctor who could
    prescribe medicine do surgery (most expensive!)
  • Apothecary shopkeepers with a little training
    skilled at mixing herbs
  • Surgeon bone cutter who did amputations
  • Barber minor surgery (like removing moles)
  • Midwife women who assisted with childbirth

Beginnings of Modern Medicine
Time Period 1700s to 1900s
Hospitals in the 1700s 1800s
  • Hospitals were often unsanitary
  • People were mixed in large rooms regardless of
    their disease
  • They were a last resort when all else failed.

Surgery Was Crude Dangerous
  • Operations were still likely to lead to death as
    a result of infection - even if the patient had
    survived the operation.
  • Doctors wore dirty overcoats over their normal
    day coat in the operating theatre in anticipation
    of the blood and other fluids that might be spilt
    in quantity - they did not want to spoil their
    day-to-day clothes !!

Surgery Was Crude Dangerous
  • Surgical instruments were not disinfected
    afterwards as they did not know about germs.
  • Operating tools would be used form one patient to
    another and not cleaned. One set of operating
    tools found at the old Guys Hospital had three
    sets of blood types on them - dried and stained
    into the wooden handles of the instruments.

William Morton, 1846
  • American Dentist
  • Used ether as an anesthetic to put the patient to
    sleep before surgery

Major Advancements - Nursing
  • The participation of women in medical care
    (beyond serving as midwives, sitters and cleaning
    women) was brought about by the likes of Florence
    Nightingale and Clara Barton.
  • These women showed a previously male dominated
    profession the importance of nursing in order to
    lessen the death rate which resulted from lack of
    hygiene and nutrition.

Major Advancements - Nursing
  • Florence Nightingale (1820-1910) was a nurse in
    London (rare for a woman from a wealthy family)
  • Nightingale took over the St Thomas hospital in
  • In 1854, the British army asked her to help
    during the Crimean War.
  • She revolutionized hospital care with cleanliness
    and organization
  • Set up school for nurses soon all nurses were

Florence Nightingale
Nursing in America
  • Clara Barton (1821-1912)
  • Coordinated medical supplies for the Union Army
    in the Civil War
  • After the War, she coordinated the search from
    missing Union soldiers
  • Founded the American Red Cross in 1881

Clara Barton, Civil War nurse
  • Known since 10,000 BC
  • Smallpox affected all levels of society.
  • In the 1700s in Europe, 400,000 people died each
  • Up to 60 who got it died
  • Smallpox killed thousands of Native Americans
    when the Europeans brought the infection to the
    New World

Smallpox Symptoms
  • High fever, body-aches (like many viruses)
  • Pus-filled bumps covered the body, especially
    face, arms, and legs.
  • Bumps were hard and itchy then burst and spread
    the pus
  • 1/3 of survivors went blind
  • Most had disfiguring pock-marks
  • Smallpox was highly contagious and caused

Inoculation or Variolation
  • Lady Montague learned this process in Turkey
  • Introduced variolation to England in 1721
  • This process introduced a tiny amount of smallpox
    pus into a healthy person
  • Most people got a very mild case of smallpox and
    were then immune for life

Lady Mary Wortley Montague (16891762).
Edward Jenner
  • English country doctor 1749-1823
  • Noticed that people who had cowpox (mostly
    milkmaids) never got smallpox

Edward Jenners Experiment
  • Took pus from a cowpox blister
  • Injected it into a young boy several times
  • Then he injected smallpox into the boy
  • The boy got a mild illness survived

Jenners Original Report
The End of Smallpox
  • At first people refused to believe such a result
  • It worked well and became well-accepted
  • Better vaccines were later developed
  • Smallpox was eradicated worldwide in 1979.

Cleanliness for Doctors
  • Ignaz Semmelweis -- 1847
  • Dramatically reduced the death rate of new
    mothers from childbed fever by simply requiring
    physicians to clean their hands before attending
    to women in childbirth

Ignaz Semmelweis
  • Other doctors refused to accept his theory
  • Most still believed in humours and miasmas as the
    cause of disease
  • 20 years later, Pasteur confirmed his ideas

Streptococcus pyogenes (red-stained spheres) is
responsible for most cases of severe puerperal
John Snow
  • Father of Epidemiology
  • 1849 published theory that cholera was spread
    by contaminated food or water
  • Solved 1854 cholera epidemic in London
  • Showed that bacteria came from contaminated water
    in the Broad Street pump.

Snows Scientific Method
  • Snow created detailed maps of London showing
    where cholera deaths were occurring
  • Showed greatest infection rate near Broad Street
  • Once the pump was closed, the epidemic ceased

Louis Pasteur Germ Theory
  • French chemist professor 1822-1895
  • Started studying fermentation in beer and wine
  • Discovered that microorganisms were causing wine
    to spoil

  • "the germs of microscopic organisms abound in the
    surface of all objects, in the air and in water."
  • He determined that such micro-organisms could be
    killed by heating liquid to 55 degrees Celsius
    (about 130 degrees Fahrenheit) or higher for
    short periods of time.
  • This simple process is now known as
  • Used today in milk and many other beverages.

Germ Theory
  • Pasteur then turned his attention to other
    aspects of microorganisms
  • Theorized that germs could cause disease
  • Most doctors thought germs were a result of

Science of Immunology Begins
  • Showed that certain diseases could be prevented
    by vaccination
  • Rabies
  • Chicken cholera
  • Anthrax
  • Silkworm disease

Pasteurs Importance
  • Linking microorganisms with disease, Pasteur
    brought about a revolution in medicine.
  • His experiments confirmed the germ theory.
  • Founded the Pasteur Institute in Paris.
  • Pioneering clinic for the study of infectious
  • Still active today

Joseph Lister
  • Pasteur's work on the link between bacteria and
    disease came to the attention of the famous
    Edinburgh surgeon Lord Edward Lister.
  • He was concerned with the number of people who
    died after having operations in hospital about
    46 of all surgery patients.

Joseph Lister
  • Lister introduced disinfectant sprays during
    operations, these prevented bacteria from
    entering a wound.
  • Used a fine spray of carbolic acid in the
    operating room (annoying to doctors!)
  • He also introduced the use of dressings soaked in
    carbolic acid and strict hygiene rules to combat
  • The sterile methods introduced by Lister,
    drastically reduced the number of hospital

  • British surgeon Joseph Lister in 1865 proved the
    principles of antisepsis in the treatment of
  • Listers death rate dropped to 15
  • Few doctors followed this advice until a less
    annoying system was invented.

Spray contraption
Robert Koch
  • German scientist 1843-1910
  • Development of Koch's postulates to prove which
    germ caused which disease.

Great Microbiologist
  • First to isolate anthrax bacteria
  • Discovered bacteria that causes tuberculosis
  • Identified germ that causes cholera

Kochs Postulates
  • 1. The organism should always be found in sick
    animals and never in healthy ones
  • 2. It must be grown in pure culture
  • 3. The cultured organism must make a healthy
    animal sick
  • 4. It must be re-isolated from the newly sick
    animal and re-cultured and still be the same

Kochs Importance
  • Put an end to miasma theory
  • Created scientific process to identify
    disease-causing organisms
  • Founded bacteriology as a science
  • Awarded the Nobel Prize for Medicine in 1905
  • The Robert Koch Award Medal now honor great
    achievements in microbiology

Major Accomplishments
  • It was in the late 1800s that actual cures were
    developed for certain common infectious diseases.
  • The decine in many diseases was more due to
    improvements in public health and nutrition than
    to medicine.

Major Accomplishments
  • Invention of X-rays 1895
  • Wilhelm Roentgen, German physicist
  • Led to science of radiology

Other Advancements
  • 1842 -- Crawford W. Long uses ether as a general
  • 1896 -- First vaccine developed for typhoid fever
  • 1897 -- First vaccine developed for Bubonic
  • 1899 Felix Hoffman develops aspirin
  • 1901 - Karl Landsteiner introduces the system to
    classify blood into A, B, AB, and O groups
  • 1923 -- First vaccine developed for diphtheria.
  • 1926 -- First vaccine developed for whooping
  • 1927 -- First vaccines developed for tuberculosis

Alexander Fleming
  • Scottish doctor
  • Discovered penicillin in 1928
  • First antibiotic
  • Won Nobel Prize in Medicine in 1944

Major Advancements
  • It was not until the 20th century that the
    application of the scientific method to medical
    research began to produce multiple important
    developments in medicine, with great advances in
    pharmacology and surgery.
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