| Halsted's operation | An operation for the radical correction of inguinal hernia. Synonym: radical mastectomy. (05 Mar 2000) |
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| 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) |
| Hill operation | Repair of hiatus hernia; narrowing the oesophagogastric junction and attaching it to the right medial arcuate ligament. (05 Mar 2000) |
| Hoffa's operation | In congenital dislocation of the hip, hollowing out the acetabulum and reduction of the head of the femur after severing the muscles inserted into the upper portion of the bone. (05 Mar 2000) |
| second-look operation | Exploratory celiotomy within a year after apparently curative resection of intra-abdominal cancer, in patients with no sign or symptom of recurrence, to resect an occult tumour if present. (05 Mar 2000) |
| Hofmeister's operation | Partial gastrectomy with closure of a portion of the lesser curvature and retrocolic anastomosis of the remainder to jejunum. (05 Mar 2000) |