A voucher is a bond of the redeemable transaction type which is worth a certain monetary value and which may be spent only for specific reasons or on specific goods.
In 1985 a robot, the Unimation Puma 200, was used to place a needle for a brain biopsy using CT guidance. In 1992, the PROBOT, developed at Imperial College London, was used to perform prostatic surgery by Dr. Senthil Nathan at Guy's and St Thomas' Hospital, London. This was the first pure robotic surgery in the world.
Scroll down below the mitral valve repair diagram for the answer. According to G. Wayne Miller, in King Of Hearts: The True Story Of The Man Who Pioneered Open Heart Surgery, the first successful mitral valve repair surgery, a commissurotomy, was performed on June 10, 1948. So, the answer to our trivia question is B. If you are curiousâ¦ The surgery was performed by Dr. Charles P. Bailey at Episcopal Hospital in Philadelphia, Pennsylvania. It was Dr. Baileyâs fifth attempt at a mitral valve repair surgery.