Key hole surgery is a revolutionary concept wherein the surgeon carries out the "same operation" as in open surgery but without the big cuts associated with open surgery. In key hole surgery:
Instead of big cuts, surgeons make small cuts, put special trocars (hollow tubes) inside the body cavity, put a telescope inside (with a specialized camera mounted on it) which gives the inside image on a monitor.
Instead of putting their hands inside, again, special trocars (hollow tubes) are inserted and specialized, 5-10mm size instruments are inserted through the trocars, and operation is carried out by manipulating these instruments from outside with the surgeons hands.
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