Table 2.

Overview of studies concerning the influence of the level of arterial ligation on anastomotic circulation

Study	Level of evidence	Design	N	Procedure	Outcome measure	Results
Seike et al. (2007)31	2b	Prospective cohort	96	Rectal cancer resection with high tie	Tissue blood flow	Significant blood flow reduction after high techniques; high blood flow reduction in older, male patients
Dworkin et al. (1996)29	2b	Prospective cohort	26	Rectosigmoid resection	Tissue blood flow	Significant blood flow reduction after IMA ligation
Hall et al. (1995)28	2b	Prospective cohort	62	Colorectal resection with high or low tie	Tissue oxygen tension	No significant difference; tissue oxygen tension of sigmoid not adequate after both techniques
Kashiwagi et al. (1994)30	2b	Prospective cohort	13	IMA clamping	Tissue blood flow	No significant reduction
Corder et al. (1992)18	2b	Retrospective cohort	143	Rectal resection with high or low tie	Anastomotic leakage rate	No significant differences

IMA = inferior mesenteric artery.