| Cotte's operation | Cutting of the presacral nerve to relieve severe dysmenorrhoea. Synonym: Cotte's operation, presacral sympathectomy. (05 Mar 2000) |
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| Pomeroy's operation | Excision of a ligated portion of the fallopian tubes. (05 Mar 2000) |
| Porro operation | Cesarean section followed by hysterectomy. Synonym: Porro hysterectomy, Porro operation. (05 Mar 2000) |
| Potts' operation | Direct side-to-side anastomosis between aorta and pulmonary artery as a palliative procedure in congenital malformation of the heart. Synonym: Potts' anastomosis. (05 Mar 2000) |
| Halsted's operation | An operation for the radical correction of inguinal hernia. Synonym: radical mastectomy. (05 Mar 2000) |
| Hartmann's operation | Resection of the rectosigmoid colon beginning at or just above the peritoneal reflexion and extending proximally, with closure of the rectal stump and end-colostomy. (05 Mar 2000) |
| Heaney's operation | Technique for vaginal hysterectomy. (05 Mar 2000) |
| Saenger's operation | Cesarean section followed by careful closure of the uterine wound by three tiers of sutures. (05 Mar 2000) |
| Heller operation | Oesophagomyotomy at the gastro-oesophageal region. (05 Mar 2000) |
| Schauta vaginal operation | An extensive extirpation of the uterus and the adnexa, using the vaginal approach facilitated by Schuchardt's operation. (05 Mar 2000) |
| Schonbein's operation | The use of a flap of mucous membrane from the posterior wall of the pharynx to the soft palate closing off the flow of air from the nose to the mouth. (05 Mar 2000) |
| Schroeder's operation | Excision of diseased endocervical mucosa. (05 Mar 2000) |
| Schuchardt's operation | A paravaginal rectal displacement incision, a surgical technique of making the upper vagina accessible for fistula closure or radical surgery via the vagina. (05 Mar 2000) |
| scleral buckling operation | An operation performed in retinal detachment to indent the sclerochoroidal wall. (05 Mar 2000) |
| Scott operation | A jejunoileal bypass for morbid obesity utilizing end-to-end anastomosis of the upper jejunum to the terminal ileum, with the bypassed intestine closed proximally and anastomosed distally to the colon. (05 Mar 2000) |