16 The patient had/underwent surgery on his heart.
17 It takes a steady hand to perform surgery.
18 This powerful drug is used to tranquilize patients undergoing surgery.
19 Her hip has been troublesome for quite a while, and she'll probably need surgery on it.
20 The health service can't provide cosmetic surgery.
21 She had to have surgery to remove an obstruction from her throat.
22 He underwent surgery to remove a blood clot.
23 He will require surgery on his left knee.
24 If you do not require surgery you can be treated as an out-patient.
25 Laser surgery has become much more refined over the last decade.
26 They've already undergone surgery to stretch their skin.
27 Doctors not involved with his treatment have told the BBC that surgery is not particularly effective for patients in Sharon's condition.
28 A brain surgeon practicing every day may do a faster and better job than someone who does brain surgery once every few years.
29 Now, if the extra appendage is hindering the dog, or is going to cause damage or injury to her, then yes, by all means, perform the surgery.
30 Robinson is in seclusion, recovering from major surgery and suffering greatly from the loss of her only son.