NCT04453592

Adductor Longus Tenotomy & the BKFO Test

The Effect of an Adductor Longus Tenotomy on the Bent Knee Fall Out Test

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 60 (actual)
• Sponsor: Aspetar · Academic / Other
• Sex: Male
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

The bent knee fall out test (BKFO) is a common test for hip adductor flexibility. It is unknown whether the BKFO actually tests the the adductors or potentially hip range of motion instead. In this study, the BKFO test is performed in the operating theater before and after an adductor longus tenotomy.

Detailed description

Adductor-related groin pain is the most common type of groin pain in athletes, and pain at the proximal adductor longus insertion is a key finding in the diagnosis of longstanding groin pain. "Tightness" or "shortening" of the adductor longus is considered both a cause and effect of pain, that can lead to increased tension at the proximal insertion, thus playing a role in the persistence of longstanding adductor-related pain. For patients who do not respond sufficiently to non-surgical procedures, an adductor longus tenotomy is a surgical option that is considered to reduce tension at the proximal adductor longus insertion assisting in reduction of pain and return to sport. The bent knee fall out test (BKFO) is one of the most commonly used tests to test adductor flexibility. This test involves a combined hip movement with hip flexion, abduction, and external rotation, and a high result is generally considered to be related to adductor muscle "tightness", specifically that of the adductor longus. It is uncertain whether the BKFO test is actually measuring adductor muscle flexibility or hip joint range of motion, as the test results may also be affected by a femoral head cam morphology. A slightly different test, called the Patrick FABER's test, involves a similar movement and is mainly used as a hip joint pain provocation test. By cutting the adductor longus tendon, thereby removing the effect of potential adductor longus "tightness", it will be possible to show if and how much the flexibility of this muscle affects the BKFO test results. This will assist in future considerations of what this test is actually testing. The aim of this study is to investigate the immediate effect of an adductor longus tenotomy on the results of the bent knee fall out test.

Conditions

• Adductor Tendinitis

Interventions

Type	Name	Description
OTHER	No intervention assigned as part of this study.	The intervention included in this study is part of routine medical care, and not assigned as a result of study participation. This study includes only the addition of a measurement; the bent knee fall out test. Therefore, we believe this study design is observational, and in line with the provided observation study design definition: "Observational: studies in human beings in which biomedical and/or health outcomes are assessed in predefined groups of individuals. Participants in the study may receive diagnostic, therapeutic, or other interventions, but the investigator does not assign specific interventions to the study participants. This includes when participants receive interventions as part of routine medical care, and a researcher studies the effect of the intervention." See uploaded study protocol for further details.

Timeline

• Start date: 2019-11-22
• Primary completion: 2020-05-22
• Completion: 2021-01-18
• First posted: 2020-07-01
• Last updated: 2025-03-03
• Results posted: 2025-03-03

Locations

1 site across 1 country: France