Short-term outcomes after laparoscopic colorectal surgery in patients with previous abdominal surgery: A systematic review

Table 1 Definition of conversion in the 13 studies included in the review of patients submitted to laparoscopy with or without previous abdominal surgery

Ref.	Definition of conversion
Hamel et al[19]	“any incision unplanned, made sooner than planned or longer than 5 cm”
Kwok et al[26]	“abdominal incision exceeded 8 cm; or the incision was extended for any reasons other than division of the bowel and extraction of specimens”
Law et al[22]	N/A
Arteaga González et al[21]	N/A
Franko et al[23]	“change in operative strategy requiring exsufflation of capnoperitoneum and elongation of the surgical incision to allow direct visualization for continued dissection”
Vignali et al[14]	“abdominal incision longer than 7 cm or an abdominal incision made earlier or different from that planned at the start of the procedure”
Nozaki et al[17]	N/A
Offodile et al[25]	“final incision length longer than 7 cm (after skin closure)”
Barleben et al[16]	N/A
Fukunaga et al[24]	“performance of an unplanned incision”
Maggiori et al[18]	“any unplanned incision or a planned incision longer than 6 cm”
Naguib et al[20]	N/A
Yamamoto et al[13]	“any incision more than 8 cm in length needed to complete or facilitate the procedure that could not be completed” laparoscopically

N/A: Not available.

Table 2 Intraoperative findings of 13 studies in patients submitted to laparoscopy with or without previous abdominal surgery

Ref.	Type of study	No. of patients			Conversion rate (%)			Inadvertent enterotomy (%)
		Total	PAOS	non PAOS	PAOS	non PAOS	P-value	PAOS	non PAOS	P-value
Hamel et al[19]	Comparative	85	36	49	17	12	0.754	N/A	N/A	N/A
Kwok et al[26]	Comparative	91	26	65	15.4	7.7	0.55	N/A	N/A	N/A
Law et al[22]	Comparative	295	84	211	17	11	0.181	N/A	N/A	N/A
Arteaga González et al[21]	Comparative	86	27	59	26.1	5.1	0.02	0	1.7	NS
Franko et al[23]	Comparative	820	347	473	19	11	< 0.001	1.4	0.2	0.04
Vignali et al[14]	Case-matched	182	91	91	16.5	8.8	0.18	N/A	N/A	N/A
Nozaki et al[17]	Comparative	121	21	100	0	0	N/A	N/A	N/A	N/A
Offodile et al[25]	Comparative	414	171	243	17	15	0.42	N/A	N/A	N/A
Barleben et al[16]	Observational; not comparative	55	55	0	14.5	N/A	N/A	N/A	N/A	N/A
Fukunaga et al[24]	Comparative	607	192	415	5.2	2.6	0.108	2.6	0	0.001
Maggiori et al[18]	Case-matched	367	167	200	22	13	0.017	N/A	N/A	N/A
Naguib et al[20]	Comparative	181	68	113	13.2	10.6	0.6	2.9	0	0.14
Yamamoto et al[13]	Comparative	1701	580	1121	12.4	10.2	0.16	0.9	0.1	0.037
Total		5005	1865	3140

NS: Not significant; N/A: Not available; PAOS: Previous abdominal surgery.

Table 3 Postoperative findings of 13 studies in patients submitted to laparoscopy with or without previous abdominal surgery

Ref.	No. of patients			Morbidity (%)
	Total	PAOS	non PAOS	PAOS	non PAOS	P-value
Hamel et al[19]	85	36	49	47	37	0.18
Kwok et al[26]	91	26	65	23	23	0.79
Law et al[22]	295	84	211	16	20	0.516
Arteaga González et al[21]	86	27	59	39	38	NS
Franko et al[23]	820	347	473	N/A	N/A	N/A
Vignali et al[14]	182	91	91	25.3	23.1	0.86
Nozaki et al[17]	121	21	100	14	15	0.94
Offodile et al[25]	414	171	243	N/A	N/A	N/A
Barleben et al[16]	55	55	0	N/A	N/A	N/A
Fukunaga et al[24]	607	192	415	15.6	14.5	0.767
Maggiori et al[18]	367	167	200	22	19	0.543
Naguib et al[20]	181	68	113	N/A	N/A	N/A
Yamamoto et al[13]	1701	580	1121	25.3	23.3	0.345

NS: Not significant; N/A: Not available; PAOS: Previous abdominal surgery.