Background: One of the most severe complications of low anterior rectal resection is anastomotic leakage (AL). The creation of a loop ileostomy (LI) reduces the prevalence of AL requiring surgical intervention. However, up to one-third of temporary stomas may never be closed.
The first aim of the study was to perform a retrospective assessment of the impact of LI on the risk of permanent stoma (PS) and symptomatic AL. The second aim of the study was to assess preoperative PS risk factors in patients with LI.
Methods: A total of 286 consecutive patients who underwent low anterior rectal resection were subjected to retrospective analysis. In 101 (35.3%) patients, diverting LI was performed due to low anastomosis, while in the remaining 185 (64.7%) patients, no ileostomy was performed. LIs were reversed after adjuvant treatment. Analyses of the effect of LI on symptomatic AL and PS were performed. Among the potential risk factors for PS, clinical factors and the values of selected peripheral blood parameters were analysed.
Results: PS occurred in 37.6% and 21.1% of the patients with LI and without LI, respectively (p <0.01). Symptomatic ALs were significantly more common in patients without LI. In this group, symptomatic ALs occurred in 23.8% of patients, while in the LI group, they occurred in 5% of patients (p <0.001). In the LI group, the only significant risk factor for PS in the multivariate analysis was preoperative plasma fibrinogen concentration (OR = 1.007, 97.5% CI 1.002-1.013, p = 0.013).
Conclusions: Although protective LI may reduce the incidence of symptomatic AL, it can be related to a higher risk of PS in this group of patients. The preoperative plasma fibrinogen concentration can be a risk factor for PS in LI patients and may be a useful variable in decision-making models.

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Posted 21 Jul, 2020
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Posted 21 Jul, 2020
On 27 Jul, 2020
On 19 Jul, 2020
Received 17 Jul, 2020
On 17 Jul, 2020
Invitations sent on 17 Jul, 2020
On 17 Jul, 2020
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On 17 Jul, 2020
On 17 Jul, 2020
Received 17 Jul, 2020
Received 17 Jul, 2020
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On 17 Jun, 2020
Received 15 Jun, 2020
Received 14 Jun, 2020
Received 07 Jun, 2020
Received 07 Jun, 2020
On 04 Jun, 2020
On 04 Jun, 2020
On 04 Jun, 2020
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On 02 Jun, 2020
On 02 Jun, 2020
On 02 Jun, 2020
Received 02 Jun, 2020
Received 02 Jun, 2020
On 01 Jun, 2020
Invitations sent on 01 Jun, 2020
On 31 May, 2020
On 31 May, 2020
On 29 May, 2020
Background: One of the most severe complications of low anterior rectal resection is anastomotic leakage (AL). The creation of a loop ileostomy (LI) reduces the prevalence of AL requiring surgical intervention. However, up to one-third of temporary stomas may never be closed.
The first aim of the study was to perform a retrospective assessment of the impact of LI on the risk of permanent stoma (PS) and symptomatic AL. The second aim of the study was to assess preoperative PS risk factors in patients with LI.
Methods: A total of 286 consecutive patients who underwent low anterior rectal resection were subjected to retrospective analysis. In 101 (35.3%) patients, diverting LI was performed due to low anastomosis, while in the remaining 185 (64.7%) patients, no ileostomy was performed. LIs were reversed after adjuvant treatment. Analyses of the effect of LI on symptomatic AL and PS were performed. Among the potential risk factors for PS, clinical factors and the values of selected peripheral blood parameters were analysed.
Results: PS occurred in 37.6% and 21.1% of the patients with LI and without LI, respectively (p <0.01). Symptomatic ALs were significantly more common in patients without LI. In this group, symptomatic ALs occurred in 23.8% of patients, while in the LI group, they occurred in 5% of patients (p <0.001). In the LI group, the only significant risk factor for PS in the multivariate analysis was preoperative plasma fibrinogen concentration (OR = 1.007, 97.5% CI 1.002-1.013, p = 0.013).
Conclusions: Although protective LI may reduce the incidence of symptomatic AL, it can be related to a higher risk of PS in this group of patients. The preoperative plasma fibrinogen concentration can be a risk factor for PS in LI patients and may be a useful variable in decision-making models.

Figure 1
This is a list of supplementary files associated with this preprint. Click to download.
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