ChiCTR2000032210.

Study name	A randomized, double‐blind, controlled clinical trial of platelet‐rich plasma combined with arthroscopy in the treatment of lateral epicondylitis
Methods	3‐arm parallel randomised controlled trial
Participants	Inclusion criteria • Diagnosis of LE by MRI or ultrasound without obvious tear of tendon • Symptoms longer than 6 months • After conservative treatment is ineffective or has poor effect • Repeated symptoms (≥ 2 times) Exclusion criteria • Without any treatment • Underwent surgery or PRP treatment that was ineffective • Haematological disease, infection, coagulation dysfunction, etc.; not suitable for surgery or PRP treatment • Patient does not accept enrolment or follow‐up plan • Mental symptoms and cannot complete the test and follow‐up evaluation
Interventions	Group 1: PRP Group 2: arthroscopic surgery Group 3: arthroscopic surgery with PRP
Outcomes	VAS
Starting date	01/05/2020
Contact information	Liu Yan 363 Furong Avenue, Wenjing District, Chengdu, Sichuan +86 18190030357 123315971@qq.com
Notes	Recruiting