Prednisolone Urinary Excretion Kinetics (URIPRED)

University Hospital, Strasbourg, France

Status

Withdrawn

Conditions

Articular Cartilage Disorder of Knee

Treatments

Drug: Prednisolone

Study type

Observational

Funder types

Other

Identifiers

NCT05300490

8328

Details and patient eligibility

About

The urinary elimination kinetics of glucocorticoids after intra-articular injection is very poorly documented. It is estimated that glucocorticoids may be present in the urine up to 6 weeks after intra-articular injection. However, this is not supported by any scientific literature. Despite this lack of evidence, in doping control practice, any presence of glucocorticoids in urine is accepted when the athlete provides evidence of an intra-articular injection that took place less than 6 weeks prior to the doping control. Many doping cases are open to challenge because they are based solely on measurements of prednisolone concentrations and its blood esterase product, prednisone. In order to demonstrate the use of prednisolone for doping purposes (systemic and not intra-articular use), it is therefore necessary to know the urinary elimination kinetics of prednisolone and prednisone, as well as the evolution of the concentration ratio between these 2 molecules.

Sex

All

Ages

18 to 65 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

- Male or female
18-65 years old
requiring intra-articular injection of prednisolone as part of routine care
naive to any corticosteroid administration
requiring a blood biology test as part of routine care and before the infiltration procedure
For women of childbearing age, negative urine pregnancy test at inclusion
Affiliated to a social health insurance plan
Able to understand the protocol and give free, informed and written consent