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The History of Medical Instruments
A plain-language overview of how diagnostic and surgical tools developed, from ancient bronze implements to the stethoscope, thermometer and syringe.
Medicine and the Body
Medical Instruments
Everyday tools of examination and treatment, told as history.
Antiseptic Surgery and Clean Operating Rooms
How carbolic acid sprays, arguments over handwashing and slowly changing habits moved surgery from dirty rooms toward sterile technique in the 1800s.
Ether and Chloroform Anesthesia Enters Surgery
The mid-1800s demonstrations of ether and chloroform, why credit for surgical anesthesia is still disputed, and how the new methods changed operations.
Surgical Gloves and Sterile Practice
How rubber gloves entered operating rooms in the 1890s, the Halsted story, and why gloves became part of sterile practice alongside gowns and masks.
The Blood Pressure Cuff
From Stephen Hales's horse experiment in 1733 to the Riva-Rocci cuff and Korotkov's sounds, the history of how blood pressure became measurable at the arm.
The Clinical Thermometer and Measuring Fever
How body temperature went from a hand on the forehead to a routine clinical measurement, from Santorio and Fahrenheit to Wunderlich and Allbutt.
The Electrocardiograph and Recording the Heartbeat
How Augustus Waller, Willem Einthoven and others turned the heart's faint electrical signal into a paper trace, and how early string galvanometer ECG machines worked.
The Hypodermic Syringe and Injection
The history of hollow needles and syringes, from seventeenth-century animal experiments to the 1853 designs of Wood and Pravaz and the disposable plastic syringe.
The Ophthalmoscope and Looking Inside the Eye
How Helmholtz's 1851 ophthalmoscope let doctors see the living retina for the first time, the Babbage claim, and how retinal examination became routine.
The Stethoscope and Listening to the Body
How René Laennec's rolled paper and wooden tube of 1816 became the stethoscope, and how binaural designs and flexible tubing shaped the modern instrument.
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