not my usual field but believe "traction" here means the ovarian pedicle is being held firmly or taut. See procedure explained here. NB "taut" is misspelt as "taught" but the words "held throughout procedure " are also used

http://www.hindawi.com/journals/ogi/2010/542693/

Sectioning the Ovarian Pedicle and Broad Ligament
- Ovarian Pedicle. The ovary is grasped and babcock forceps placed. The latter are handed to an assistant who holds the ovarian pedicle taught out of the abdomen to facilitate placement of a ligature as close as possible to the root of the pedicle to ensure haemostasis of the ovarian artery.
The broad ligament is then punctured with a clamp to grasp the suture material and a ligature is placed in the ovarian pedicle as close as possible to the lumbar wall. Once this ligature has been placed, the ends of the threads are kept long so that the ovarian pedicle can be found with ease in the event of haemorrhage.
A clamp is then placed between this ligature and the ovary, and the pedicle is sectioned between the two. The ovarian pedicle is held throughout this procedure with a clamp. The quality of the haemostasis is checked; the long ends of the suture material on the ovarian pedicle are then cut.

So rephrase using hold taut or just use "traction"

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Note added at 373 days (2015-10-05 12:16:13 GMT) Post-grading
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glad to have helped