Abstract:

Objective By comparing with arthroscopic rotator cuff repair alone， to explore the efficacy and difference of leukocyte poor platelet?rich plasma （LP-PRP） and leukocyte rich platelet-rich plasma （LR-PRP） in arthroscopic rotator cuff repair. Methods Sixty patients with total rotator cuff tear accompanied by arthroscopic rotator cuff repair admitted to the Affiliated Hospital of North China University of Science and Technology from October 2021 to September 2022 were included and randomly divided into control group （n = 20）， LP-PRP group （n = 20） and LR-PRP group （n = 20）. The control group only received arthroscopic rotator cuff repair. The LP-PRP group was injected with leukocyte poor platelet-rich plasma （LP-PRP） into the sutured torn tendon after the same operation， and the LR-PRP group was injected with leukocyte rich platelet-rich plasma （LR-PRP） into the sutured torn tendon after the same operation. The postoperative rehabilitation training plan of the three groups was the same， and the postoperative follow-up and evaluation were conducted for 1 year. It included pain score （VAS score）， shoulder joint function score （CMS， UCLA， ASES score）， retear rate and related complications. Results All patients were followed up. （1）VAS score： Compared with the LR-PRP group and the control group， the results were statistically significant only at 1， 3 and 6 weeks after surgery （P < 0.05）； There was no statistical significance between the LR-PRP group and the control group at 1 week， 3 weeks， 6 weeks， 3 months， 6 months and 12 months after surgery（P > 0.05）. （2）CMS， UCLA and ASES scores： There were no significant differences between the LP-PRP group and the LR-PRP group at 3 months， 6 months and 12 months after surgery（P > 0.05）； Compared with LP-PRP group and LR-PRP group， there were significant differences in each follow-up time point of control group （P < 0.05）. （3）Retear rate： In the LP-PRP group， there was 1 retear in the LR-PRP group （tear rate 5%）， and 3 in the control group （tear rate 15%）. There was no statistically significant difference between the three groups（P > 0.05）. （4）There were no postoperative complications in 60 patients. Conclusions Compared with arthroscopic rotator cuff repair alone， although the application of LP-PRP and LR-PRP could not reduce the rate of retear， it could significantly improve the shoulder joint function of patients， and LP-PRP could significantly reduce the pain of patients with rotator cuff injury in the early postoperative period （within 6 weeks）， with no postoperative complications， and the short-term clinical results of patients were satisfactory.

Key words: leukocyte-poor platelet-rich plasma, leukocyte-rich platelet-rich plasma, rotator cuff tear, arthroscope