Incidence of Subtalar Joint Fusion After Isolated Ankle Fusion

NCT ID: NCT06782269

Last Updated: 2025-04-08

Basic Information

• Recruitment Status: NOT_YET_RECRUITING
• Total Enrollment: 400 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2025-06-01
• Study Completion Date: 2026-12-31

Brief Summary

It is important to know a truer incidence of the need for subtalar and midfoot fusions, following an isolated ankle fusion, in order to better inform our patients of the likelihood of needing further surgery in the future. It is also important to understand whether pre-existing radiological arthrosis is likely to lead to the need for a fusion in the future and also how important the alignment of the ankle joint, after a fusion, may influence that.

The aim of the study is to review the patients' notes and radiology who have had a previous isolated ankle fusion and then to see whether they subsequently required further surgery.

Detailed Description

Isolated ankle fusion is normally regarded as a good operation producing good pain relief and allowing patients to function well. Patients will have an early heel rise when walking and although that is often not immediately perceptible to an onlooker, it does increase the stress on the neighbouring subtalar and Chopart joints. Radiologically, subtalar joint arthrosis is common following isolated ankle fusions but not necessarily clinically symptomatic. The long term incidence of subsequent ipsilateral subtalar or Chopart joint fusions is not well known. Various different studies have shown a prevalence of osteoarthrosis (radiologically) of 24-100% in the subtalar joint and reported 84% of patients complaining of pain after 10 years. The prevalence in the Chopart joints has been reported to vary between 18-77%.

This is an observational study reviewing medical records and radiology of patients who have had an isolated ankle fusion. The data will be analysed using basic statistics with logistic regression modelling.

Conditions

Ankle Arthritis

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: RETROSPECTIVE

Interventions

ankle fusion

fusion of ankle joint

Intervention Type: PROCEDURE

Eligibility Criteria

Inclusion Criteria

Any patient who has had an isolated ankle fusion and is over the age of 18 years old.

Exclusion Criteria

Participants younger than 18 years old.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 100 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Robert Jones and Agnes Hunt Orthopaedic and District NHS Trust

OTHER_GOV

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Central Contacts

Julie Steen

Role: CONTACT

julie.steen@nhs.net

01691404418

Jayne Edwards

Role: CONTACT

jayne.edwards5@nhs.net

01691404143

Other Identifiers

RL1901

Identifier Type: -

Identifier Source: org_study_id