NCT05614908

Outcome After Conservatively Treated Achilles Tendon Rupture

Nonsurgical Treatment of Achilles Tendon Rupture: Comparison of an 8-week Liberal Regime With an 11-week Restrictive Regime. A Prospective Cohort Quality Assurance Study.

• Status: Enrolling By Invitation
• Phase: —
• Study type: Observational
• Enrollment: 220 (estimated)
• Sponsor: Aarhus University Hospital · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

The main purpose of the study is to compare the patient-reported outcomes and adverse events of two different rehabilitation regimes for patients undergoing non-surgical treatment of Achilles Tendon Rupture. Thus, using a pre-post study design we will compare whether patients participating in an 8-week liberal rehabilitation regime will achieve the same, or better, self- reported functional ability, without increased risk of adverse events, in the first two years following injury, compared to an 11 weeks more restrictive rehabilitation regime..

Detailed description

Background: The Achilles tendon is the most commonly injured tendon in the lower extremity, and can be treated either surgical or non-surgical. Previous studies have investigated early controlled motion and weight-bearing for non-surgically treated Achilles Tendon Rupture (ATR). Early motion may cause tendon elongation, which leads to decrease in push off strength, and thus potentially a poorer functional outcome. Conversely, delayed initiation of mobilisation and weight-bearing may similarly hinder or delay optimal recovery of function and return to work and sports. The correct treatment and rehabilitation, including the timing of rehabilitation initiation, may therefore be crucial to ensure the patients functional ability. Most hospitals in Denmark treating patients with ATR, provide a regime of 8-9 weeks of treatment for non-surgically treated patients. At Aarhus University Hospital (AUH), however, a more restrictive regime has been provided for these patients in the past 7 years, with a treatment period of 11 weeks after injury, and with no or limited weight-bearing or exercises. A previous retrospective study at AUH including 100 patients undergoing non-surgical treatment and the restrictive 11 week rehabilitation regime was conducted in 2023. The results documented a re-rupture rate of 4 %, comparable to the rate reported at the Danish ATR Database, and similarly comparable results on patient-reported disability measured with the Achilles tendon Total Rupture Score (ATRS). The Danish ATR Database includes data from 11 different hospitals in Denmark, where the majority have implemented a more liberal rehabilitation regime of 8-9 weeks of treatment with early weight-bearing and exercises. As a result of this retrospective study, we are changing the rehabilitation protocol of ATR at AUH, from 11 weeks restrictive regime, to an 8 weeks liberal regime. Purpose: With this quality assurance study we aim to compare patient-reported outcomes and adverse events in patients participating in an 8-week liberal regime compared to an 11-week restrictive regime following non-surgically treated ATR Study design and setting: This is an observational cohort study with prospectively collected patient-reported outcomes, conducted at AUH. First, 110 consecutive patients will be included while the existing 11-week restrictive regime is standard care, then the 8-week liberal regime will be implemented, and subsequently another 110 patients will be consecutively included. Data collection procedures and outcomes: Patients will receive a digital letter with a link to an online questionnaire to be completed at 6 months, 12 months and 24 months from the date of the treatment start. Patients are asked to fill out the ATRS on functional ability, as well as additional questions regarding job status, return to sport, incidence of deep venous thrombosis, whether they have sustained a re-rupture, and their satisfaction with treatment they received at the hospital. The ATRS is a 10-item questionnaire, with a score of 0 to 10 (worst-best), which has been found valid, reliable and responsive in this population. Statistical analysis: The primary outcome is the difference in the self-reported ATRS score at 12 months in patients participating in the 8-weeks regime compared to the 11-week regime. The sample size needed to detect a minimal clinical important difference of 10 points (SD 18) between the two groups is 102, with a significance level of 5% and a power of 80%. To allow for subgroup analysis and with an estimated rate of drop-out of 20%, a minimum of 200 patients will be included.

Conditions

• Achilles Tendon Rupture
• Achilles Tendon Injury

Interventions

Type	Name	Description
OTHER	11 week restrictive regime	As part of standard care at AUH (until May 2024), patients are immobilized in scotch cast with the foot in plantarflexion during week 0-4. Next, the scotch cast is replaced by a ROM-WALKER in plantarflexion for the next 7 weeks (week 5-11 after injury). The ROM-WALKER is gradually corrected from 30 degrees plantarflexion to 0 degrees. No weight bearing or exercises is allowed and they are not allowed to remove the ROM-WALKER during week 0-10. At week 11, the patients are allowed weight bearing up to 30 kg, after which there is no longer weight bearing restrictions. From week 12 they are allowed full weight bearing with a 1 cm heel lift i their shoes.
OTHER	8 week liberal regime	The patients are treated with a walker orthosis with 3 wedges in plantarflexion, during week 1-2 with no weight bearing and no exercises. After 2 weeks, the tendon will be examined, and if no defect in the tendon is detected by palpation, the patients will start partially weight bearing in week 3-5, and full weight-bearing week 6-8. They are instructed in unloaded exercises for the calf and anklejoint after 2 weeks, and loaded exercises (elastic) after 5 weeks, with a maximum position til 0 degrees in the anklejoint. Balancetraining and stationary bike training after 7 weeks. The wedges are removed one by one after 3, 5 and 7 weeks, respectively. If there is a palpable defect in the tendon after 2 weeks, the patient must wait 1 week with partially weight bearing and exercises, and remove the wedges at 4, 5 and 7 weeks after the initiation of treatment. From week 9, walking i their shoes with a 1 cm heel lift.

Timeline

• Start date: 2022-11-01
• Primary completion: 2028-02-01
• Completion: 2028-02-01
• First posted: 2022-11-14
• Last updated: 2024-09-20

Locations

1 site across 1 country: Denmark