On 23 January 1942, Harold Griffith and Enid Johnson used curare—an Amazonian arrow poison—during anaesthesia for the first time. Before curare, muscle relaxation required dangerously deep anaesthesia that risked death. After curare, anaesthetists could combine hypnosis, analgesia, and paralysis independently. The muscle relaxant revolution enabled modern surgery, including open-heart procedures and organ transplantation
Thiopental, discovered by Volwiler and Tabern in the early 1930s, revolutionised anaesthesia induction. First used by Waters on 8 March 1934, this ultra-short-acting barbiturate induced unconsciousness within seconds and recovery within minutes. The drug’s effect was terminated by redistribution, not metabolism. Despite Pearl Harbor tragedies and lethal injection controversies, thiopental dominated intravenous anaesthesia for fifty years.
The laryngoscope made the invisible visible. Manuel García discovered indirect laryngoscopy in 1854; Alfred Kirstein performed the first direct laryngoscopy in 1895. Chevalier Jackson invented the anaesthetic laryngoscope in 1913, and Sir Robert Macintosh introduced the curved blade in 1943. The laryngoscope transformed airway management, saving countless lives by enabling precise, reliable intubation.
Friedrich Trendelenburg performed the first endotracheal anaesthetic in 1869, followed by William Macewen’s orotracheal intubation in 1880. Franz Kuhn laid the foundations, and Ivan Magill refined the technique after the First World War. The laryngoscope, muscle relaxants, and cuffed tubes made intubation routine, transforming it into the cornerstone of modern anaesthesia.
Carl Koller’s 1884 introduction of cocaine anaesthesia for eye surgery launched the field of regional anaesthesia. William Stewart Halsted developed nerve blocks; August Bier pioneered spinal anaesthesia. The search for safer agents produced procaine and lidocaine, while epidural techniques transformed obstetric care. Regional anaesthesia offered safer surgery for countless patients, revolutionising pain management.
John Snow, the quiet scientist, transformed anaesthesia through precision and observation. His inhalers and dosage principles made chloroform safe; his administration to Queen Victoria legitimised obstetric anaesthesia. His 1854 cholera investigation—mapping deaths to the Broad Street pump—revolutionised epidemiology. Snow died at 45, his dual legacy unmatched—a testament to quiet competence over showmanship.
On 28 January 1848, Hannah Greener, a healthy 15-year-old, died during chloroform administration for a routine toenail operation. Her death, occurring just eleven weeks after Simpson’s announcement, ignited a fierce medical controversy. Was chloroform a miracle or a poison? The debate divided physicians, prompted John Snow’s pioneering safety research, and forever changed anaesthetic practice.
On 4 November 1847, Edinburgh obstetrician James Young Simpson, with assistants Keith and Duncan, inhaled chloroform at his dining table and collapsed unconscious. Waking, Simpson declared: “This is far stronger and better than ether.” Within days, he had used it in childbirth, published his findings, and transformed anaesthesia. Chloroform rapidly displaced ether worldwide—though Simpson’s gamble nearly cost him his life.
On October 16, 1846, at Massachusetts General Hospital, William T.G. Morton administered ether to Gilbert Abbott, enabling painless tumor excision. As Abbott awoke pain-free, surgeon John Collins Warren declared: “Gentlemen, this is no humbug.” Ether Day launched the global anaesthesia revolution, transforming surgery from agonizing ordeal to compassionate healing.
In 1842, four years before Morton’s famous demonstration, Georgia physician Crawford Long used ether to remove a neck tumor—but never published his discovery. His modesty and rural isolation cost him international fame. The bitter priority dispute that followed reveals a timeless truth: discovery without dissemination changes nothing.