Very Early Mobilization of Colorectal Surgery Patients - A Randomized Controlled Trial

Post-operative bed rest and immobility has a negative effect on morbidity and mortality after colorectal surgery.To prevent immobilization early mobilization is a well established part of Enhanced Recovery Programs. This facility uses protocols developed by the ERAS (Enhanced Recovery After Surgery)-society. However not all patients can reach the level physical activity needed to be in compliance with the ERP. This being more frequent in the elderly frail patient. This may contribute to longer hospital stay and increase the risk of complications. The aim of this trial is to investigate if a very early mobilization intervention will lead to a higher lever of physical activity after surgery compared with standard-care.

The aim is to include 150 patients scheduled to undergo colorectal surgery. Patients will receive written and verbal information about the trial before written consent is obtained. The patients will undergo an extended pre-operative assessment during which a baseline for patients physical activity level will be established before surgery. For this purpose the patients will be evaluated by a physiotherapist with the following tools; 6-minutes walk test, Timed up and go-test (TUG), mini modified Functional Independence Measure (mFIM), WHO disability assessment score (WHODAS) and activity measurement with accelerometry for up to 7 days. (Actigraph GT3X device)

The randomization will take place on the day of the surgery and the patients will be assigned to either intervention (very early mobilization) or control group (standard post-operative care). A stratified randomization will be performed to ensure an even spread within three patient categories: Laparoscopic surgery, Open surgery and Rectum amputation. The randomization is performed using concealed allocation where envelopes are prepared externally using a randomization list prepared by a statistician.

After surgery the patients will be transferred to the post-operative care unit where the patients included in the intervention group will be mobilized with the help of a physiotherapist and post-operative unit staff. The intervention will begin as early as 30 minutes after arrival in the post-operative unit. The intervention will follow the Surgical ICU Optimal Mobilization Score (SOMS) which includes four steps of mobilization from movement in bed up to walking. Progress from each step to the next will be conditioned with patient fulfilling criteria for a safe mobilization including stable physiological parameters and adequate pain situation. The patients in the standard care group will not receive the intervention.

All patients will receive information about early mobilization. The patients will not receive information on the timing of the mobilization intervention in an effort to remain blinded to the intervention. The patient in the standard care group will be mobilized accordingly to the ERP protocol, which also includes early mobilization in the surgical ward. Upon transfer from the post-operative unit to the surgical ward all study patients will be again fitted with the activity monitor to measure their physical activity during the post-operative phase.