Key interventions and outcomes in perioperative care pathways in emergency laparotomy: a systematic review

Introduction
Emergency laparotomy (EmLap) is a complex clinical arena, delivering time-sensitive, definitive care to a high-risk patient cohort, with significant rates of post-operative morbidity and mortality. Embedding perioperative care pathways within this complex setting has the potential to improve post-operative outcomes, however, requires an in-depth understanding of their design, delivery and outcome assessment. Delivering and implementing complex interventions such as perioperative pathways require transparent reporting with detailed and indepth description of all components during the assessment and evaluation phase. The aim of this systematic review was to identify the current design and reporting of perioperative pathways in the EmLap setting.

Methods
The OVID SP versions of MEDLINE, EMBASE and the Cochrane Central Register of Controlled Trials were searched between January 1950 and December 2023. All randomised and non-randomised cohort studies reporting outcomes on perioperative care pathways in adult patients (> 18 years old) undergoing major emergency abdominal surgery were included. A narrative description of all perioperative pathways included was reported to identify design and description of the pathway including the delivery and timing of component interventions. All pathways were evaluated against the Template for Intervention Description and Replication (TIDieR) checklist.

Results
Eleven RCTs and 19 non-randomised studies were identified, with most studies considered to be at moderate risk of bias. Twenty-six unique pathways were identified and described, delivering a total of 400 component interventions across 44,055 patients. Component interventions were classified into 24 domains across the perioperative pathway. Twenty studies (66.6%) did not report the TIDieR framework items, with thirteen studies reporting less than 50% of all items. Two hundred and fifty individual outcomes were reported across pathways, with the most commonly reported outcomes related to morbidity, mortality and length of stay.

Conclusion
Current perioperative pathways in EmLap setting are underpinned by variable component interventions, with a lack of in-depth intervention reporting and evaluation. Future studies should incorporate the TIDieR checklist when reporting on perioperative pathways in the EmLap setting.