Influence of fat infiltration, tear size, and post-operative tendon integrity on muscle contractility of repaired supraspinatus muscle
| Autor: | Hugo Giambini, Yoshiro Kiyoshige, Takuma Yuri, Kyosuke Hoshikawa, Nariyuki Mura, Hiromi Fujii |
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| Rok vydání: | 2020 |
| Předmět: |
medicine.medical_specialty
Supraspinatus muscle Contraction (grammar) Fat infiltration Rotator Cuff Injuries Contractility Tendons 03 medical and health sciences Rotator Cuff 0302 clinical medicine Internal medicine medicine Humans Orthopedics and Sports Medicine Rotator cuff Post operative Rest (music) Rupture 030222 orthopedics business.industry 030229 sport sciences Magnetic Resonance Imaging Tendon medicine.anatomical_structure Cardiology Surgery business |
| Zdroj: | European journal of orthopaedic surgerytraumatology : orthopedie traumatologie. 32(5) |
| ISSN: | 1432-1068 |
| Popis: | Background The purpose of this study was to evaluate the effect of fat infiltration, tear size, and post-operative tendon integrity, on post-operative contractility. Methods Thirty-five patients who underwent rotator cuff repair were included. The fat infiltration, tear size, and post-operative tendon integrity were evaluated by Goutallier stage, Cofield classification, and Sugaya classification, respectively. The muscle elasticity at rest and at contraction was assessed by real-time tissue elastography pre- and one-year post-operatively. We defined the difference in elasticity between at rest and at contraction as the activity value which reflects muscle contractility. Results The activity value in patients with Sugaya Type I tended to increase regardless of Cofield classification, whereas those with Sugaya Type III and IV tended to decrease. While the activity value in the patients classified as stage 1 and Type I tended to increase, patients classified as stage 2 showed decreased or constant in contractility even in those subjects classified as Type I. Stepwise multiple regression analysis showed both pre- (p = 0.004, r = -0.47) and post-operative activity values (p = 0.022, r = -0.39) to be significantly correlated only with the Goutallier stage. Conclusion Multiple regression analysis indicated only the Goutallier stage was a significant independent factor for contractility of the supraspinatus muscle. Supraspinatus muscle contractility in patients classified as Types III and IV based on the Sugaya classification tended to decrease post-operatively, while patients whose contractility increased post-operatively were characterized by having a Type I tendon integrity. |
| Databáze: | OpenAIRE |
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