Prospective Evaluation of Early Complications After Elective Loop Ileostomy: Need to Optimise Loperamide Management?

The need for a standard diverting ileostomy during “low” colorectal resections is continuously questioned because of increased awareness of the associated morbidity, with a move towards a “selective” use and close postoperative follow-up (FU).1 Most data in literature regarding ileostomy-related complication originates from studies with a retrospective design, with its known associated weaknesses of data incompleteness and lack of detailed recording.2 The aim of our study was to assess loop ileostomy-related complications in a prospective way, with focus on ileostomy output.


Introduction
The need for a standard diverting ileostomy during "low" colorectal resections is continuously questioned because of increased awareness of the associated morbidity, with a move towards a "selective" use and close postoperative follow-up (FU). 1 Most data in literature regarding ileostomy-related complication originates from studies with a retrospective design, with its known associated weaknesses of data incompleteness and lack of detailed recording. 2 The aim of our study was to assess loop ileostomy-related complications in a prospective way, with focus on ileostomy output.

Materials and Methods
Prospective data collection between October 2017 and August 2018 in two high volume colorectal centres. All patients who underwent an elective loop ileostomy formation were included.
Distance from the ileocecal valve and surgical technique was applied as per surgeons' preference, and loperamide management was not standardised. All FU data were recorded during in-person clinic visits. Photographs were taken of patients' loop ileostomy after their written consent at standardised time points during the study, to reassure an objective assessment over the two centres.
Means ± standard deviation or median with interquartile range was used according to distribution, T-test, or Mann-Whitney U test to compare numerical data and Chisquare or Fisher's exact for categorical data. P ≤ 0.05 was considered as the significance level.

Results
Mean hospital stay of the 81 included patients was 11 ± 9 days. None of the patients had a history of/or concomitant small bowel resection.
No ileostomy-related reinterventions were recorded during admission. Mean stoma output at discharge was 696 ± 412 ml/day, with 27/81 (33%) being on loperamide (Table 1). Twenty-six patients (32%) had an high output stoma (HOS, ≥ 1500 ml/day) during admission, with a significantly higher mean stoma output of 854 ± 386 ml/day at time of discharge (p = 0.03). There was a delay in discharge due to stoma-related issues in 17 patients (21%); because of HOS in 9 and stoma care in 8 patients (stoma training/ application problems).
There were 12 readmissions in 8 patients (10%) because of ileostomy-related complications, with in 4/8 patients (50%) because of ileostomy output-related complications and need for intensive care unit admission in one patient within a week after discharge (stoma output at discharge 975 ml/day) ( Table 1).

Discussion
HOS-related complications together with postoperative ileus/obstruction and deep infections are seen as the main reasons for readmission after elective colorectal surgery. 3 The results of our study confirm that morbidity related to the first factor is significant, with HOS-related readmission in three patients (4%) and need for intensive care unit admission in one of them within 1 week after discharge. Additionally, 9 patients (11%) experienced a delay in discharge during elective admission because of HOS which is a known risk factor for readmission. 4 With those observations in mind, our centres put forward a flowchart to aim for consistent stoma output management during admission and discharge with a focus on loperamide therapy [ Fig. 1]. In our opinion, this will result in a more systematic approach in ileostomy output management.
The importance of careful management of patients' ileostomy output is further supported by a possible impact on their long-term kidney function. 5 Strength of our study is the prospective design which allowed a detailed assessment of the ileostomy-related measures and a weakness the limited number of patients.
Further research has to focus on the question if more consistent use of loperamide therapy during admission and FU can further reduce readmission rates and morbidity associated with ileostomy formation.