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.
Dr. Hale Williams, back in 1893, had performed the first cardiac operation in the United States, and possibly the world as far as records show, Dr. Jonathan O. Nwiloh, a cardiothoracic surgeon, told TMW Media.