Study of the Antipodal Capsular Fold and Its Potential Role in Antero-inferior Glenohumeral Instability (INSTABIO)

Ramsay Générale de Santé

Status: Unknown

Conditions: Shoulder Capsulitis

Treatments: Procedure: Biopsy

Study type: Interventional

Funder types: Other

Identifiers

NCT04847180

ID-RCB : 2019-A00859-48

Details and patient eligibility

About

In schoulders instabilty, the soft tissue has not been the subject of histological studies, as has the "bare area" or zone devoid of cartilage, the exact role of which in glenohumeral biomechanics is unknown. This research is based on the hypothesis that the antipodal lesions are constant, underestimated and that an architectural disorganization at the capsulo-ligament level could contribute to the instability of the shoulder. The aim of this study is therefore to better characterize these lesions which could be the subject of a complementary stabilization procedure even in the absence of a humeral notch

Full description

Surgery for unstable shoulders sometimes involves repairing lesions that promote instability. These lesions are identified on imaging before surgery and then during the operation, but they are macroscopically inconsistent on genuine unstable shoulders. While the importance of posterior capsuloligamentous structures (soft tissue) in antero-inferior stability has been the subject of biomechanical studies, the soft tissue has not been the subject of histological studies, as has the "bare area" or zone devoid of cartilage, the exact role of which in glenohumeral biomechanics is unknown. However, this research is based on the hypothesis that the antipodal lesions are constant, underestimated and that an architectural disorganization at the capsulo-ligament level could contribute to the instability of the shoulder. The aim of this study is therefore to better characterize these lesions which could be the subject of a complementary stabilization procedure even in the absence of a humeral notch.

Enrollment: 40 estimated patients

Sex: All

Ages: 18 to 40 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

Instability Group

• Patient, male or female, over 18 years old and up to 40 years old
• Patient operated for antero-inferior shoulder instability
• Subject affiliated or beneficiary of a social security scheme
• Patient having signed the free and informed consent comparativ group
• Patient, male or female, over 18 years old and up to 40 years old
• Patient operated for a reason other than unstable shoulder
• Subject affiliated or beneficiary of a social security scheme
• Patient having signed the free and informed cons

Exclusion criteria

• History of surgery on the affected shoulder
• Capsuloligamentous disease (Ehler Danlos)
• History of instability (dislocation, subluxation) in witnesses
• Patient participating in another clinical study
• Protected patient: adult under guardianship, curatorship or other legal protection, deprived of liberty by judicial or administrative decision;
• Pregnant, breastfeeding or parturient woman;
• Patient hospitalized without consent.

Trial design

Primary purpose: Diagnostic

Allocation: Non-Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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40 participants in 2 patient groups

Instability shoulder group

Experimental group

Description:

Patients operated for an antero-inferior shoulder instability

Treatment:

Procedure: Biopsy

Non instability shoulder group

Other group

Description:

Patients without shoulder instability, operated for another reason.

Treatment:

Procedure: Biopsy