S. Jaadouni, M. Bouvard, A. Lippa, O. Bonnefoy
Some muscle injuries remain a difficult challenge for the therapist. They affect constantly the interface muscle–connective tissue. Platelet factors have recently made a grand entrance in the therapeutic strategy in sports medicine. But there is only few studies assessing PRP in muscle injury in humans.
The PRP are produced from 40 mL of citrated venous blood. They are extracted without leukocytes. Patients have benefited from 1 to 3 injections of PRP ultrasound-guided according to clinical and ultrasound importance of their lesion. A period of one week between each injection was chosen. The quantity of injected PRP is defined according to the size of the lesion at ultrasound. The evaluation focuses on the delay in return to competition. The number of recurrence was also evaluated.
Preliminary results found a mean age of 28 years including 67 % of professional athletes and 33 % of amateurs. There is an average time of return to sport competing at the same level of 35.6 days. The healing time is improved for the treatment of first injury, for the treatment of certain locations (quadriceps, hamstring) and if he is initiated between the 2nd and 9th day after injury. It has been observed only one relapse. No side effects were noted during the study.
The PRP decreases the risk of recurrence and healing times in intrinsic muscle injury in amateur and professional athletes.