Horace David Ritchie FRCS FRCSE (24 September 1920 - 21 December 1993) was a Scottish surgeon and professor of surgery.
[1] In 1951, Ritchie passed the FRCS (Edinburgh), won the Crichton Research Scholarship and subsequently attempted to construct an artificial heart.
In 1955, after lecturing in Dundee, he travelled to the Mayo clinic where he worked on surgical jaundice, for which he later won a gold medal.
[2] Along with John Blandy, who he persuaded to take up transplant surgery, Ritchie used Kolff's twin coil for dialysis, a procedure he was appointed to set up three years earlier.
Ritchie pioneered the use of hyperbaric oxygen, which he used to save the frostbitten fingers of the climbers Chris Bonington and Dougal Haston, despite them managing to climb out of the tank and repair to a nearby pub.