Medical Inventions — Set 3

Correct Answer: C. Ignaz Semmelweis

• **Ignaz Semmelweis** = He introduced the practice of handwashing to reduce maternal mortality in hospitals. • In the **1840s**, he drastically reduced 'childbed fever' in maternity wards through hand disinfection, although his ideas were initially rejected. • 💡 Wrong-option analysis: [Louis Pasteur]: Developed germ theory, which later supported Semmelweis's findings; [Joseph Lister]: Pioneered antiseptic surgery using carbolic acid; [Edward Jenner]: Developed the smallpox vaccine.

Correct Answer: B. Godfrey Hounsfield

• **Godfrey Hounsfield** = He developed the first commercially available CT (Computed Tomography) scanner. • He shared the Nobel Prize in **1979** for this invention, which allows doctors to see detailed 3D cross-sections of the human body. • 💡 Wrong-option analysis: [Paul Lauterbur]: A pioneer in MRI, developed the use of gradients in magnetic fields for imaging; [Raymond Damadian]: Invented the first MR scanning machine capable of scanning the human body; [Allan Cormack]: Developed the mathematical underpinnings for CT scanning and shared the 1979 Nobel Prize with Hounsfield.

Correct Answer: B. Earl Bakken

• **Earl Bakken** = He invented the first battery-powered external pacemaker. • In **1957**, he developed this wearable device, transforming treatment for children with heart defects by allowing mobility. • 💡 Wrong-option analysis: [Rune Elmqvist]: Developed the first implantable pacemaker in 1958; [John Hopps]: Credited with creating the first cardiac pacemaker device in 1950, which was external but not battery-powered for portability; [Wilson Greatbatch]: Accidentally invented the long-life implantable pacemaker battery in 1958.

Correct Answer: B. Barry Marshall and Robin Warren

• **Barry Marshall and Robin Warren** = They discovered the bacterium Helicobacter pylori as the cause of stomach ulcers. • They received the Nobel Prize in Medicine in **2005** for their revolutionary discovery that changed ulcer treatment from surgery to antibiotics. • 💡 Wrong-option analysis: [Robert Koch]: Known for identifying bacteria causing anthrax, TB, and cholera; [John Snow]: A pioneer in epidemiology, famous for his work on cholera outbreaks; [Alexander Fleming]: Discovered penicillin, the first antibiotic.

Correct Answer: A. Albert Szent-Györgyi

• **Albert Szent-Györgyi** = He discovered Vitamin C and its importance in preventing scurvy. • He won the Nobel Prize in **1937** for isolating hexuronic acid (later named ascorbic acid) from adrenal glands and bell peppers. • 💡 Wrong-option analysis: [Casimir Funk]: Coined the term 'vitamine' but did not discover Vitamin C; [Frederick Gowland Hopkins]: Proposed the existence of 'accessory food factors' (vitamins); [Linus Pauling]: A Nobel laureate who advocated for high doses of Vitamin C, but did not discover it.

Correct Answer: B. Selman Waksman

• **Selman Waksman** = He discovered Streptomycin, the first antibiotic effective in treating tuberculosis. • He was awarded the Nobel Prize in **1952** for his discovery of this life-saving drug, which was effective against the 'white plague'. • 💡 Wrong-option analysis: [Alexander Fleming]: Discovered penicillin, the first widely used antibiotic; [Robert Koch]: Known for identifying the tuberculosis bacterium, but not its antibiotic treatment; [Paul Ehrlich]: Developed Salvarsan, an early chemotherapy drug for syphilis.

Correct Answer: A. Willem Kolff

• **Willem Kolff** = He invented the artificial kidney (dialysis machine) using sausage casings. • During **WWII**, he built the first working dialyzer in Nazi-occupied Netherlands, which has since saved millions of people suffering from kidney failure. • 💡 Wrong-option analysis: [Belding Scribner]: Pioneered long-term dialysis access with the Scribner shunt; [Thomas Graham]: A pioneer in colloid chemistry, who studied diffusion and osmosis; [Richard Bright]: A physician who described Bright's disease (kidney disease) in the 19th century.

Correct Answer: B. Patrick Steptoe and Robert Edwards

• **Patrick Steptoe and Robert Edwards** = Their work made the first 'test-tube baby' (IVF) possible. • Louise Brown, the first IVF baby, was born in **1978**, marking a breakthrough in human infertility treatment. • 💡 Wrong-option analysis: [Francis Crick]: Co-discovered the structure of DNA; [Gregory Pincus]: Co-inventor of the birth control pill; [James Watson]: Co-discovered the structure of DNA.

Correct Answer: A. Florence Nightingale

• **Florence Nightingale** = She is considered the founder of modern nursing and introduced sanitary reforms in hospitals. • **May 12**, her birthday, is celebrated as International Nurses Day globally, honoring her contributions during the Crimean War. • 💡 Wrong-option analysis: [Dorothea Dix]: An American advocate for the mentally ill, but not the founder of modern nursing; [Mary Seacole]: A Jamaican-British nurse who also worked during the Crimean War; [Clara Barton]: Founded the American Red Cross.

Correct Answer: A. Paul Ehrlich

• **Paul Ehrlich** = He developed the first effective treatment for syphilis, called Salvarsan. • Salvarsan, developed in **1909**, was the first modern chemotherapeutic agent, pioneering the concept of a 'magic bullet'. • 💡 Wrong-option analysis: [Robert Koch]: Known for identifying disease-causing bacteria, not syphilis treatment; [August von Wassermann]: Developed the Wassermann test for syphilis diagnosis; [Alexander Fleming]: Discovered penicillin, which later became the primary treatment for syphilis, but not Salvarsan.