caa a22 4500 605460299 CHVBK 20210128100238.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s00167-013-2429-8 doi (NATIONALLICENCE)springer-10.1007/s00167-013-2429-8 In vivo blood flow after rotator cuff reconstruction in a sheep model: comparison of single versus double row [Elektronische Daten] [Dennis Liem, Nicolas Dedy, Gregor Hauschild, Georg Gosheger, Shirin Meier, Maurice Balke, Hans-Ulrich Spiegel, Bjoern Marquardt] Purpose: Arthroscopic double-row (DR) suture anchor repair of rotator cuff tears has been shown to be superior to most single-row (SR) techniques with regard to footprint reconstruction, load to failure and tendon-to-bone contact pressures. The hypothesis of this study was that the greater contact pressures of DR techniques would compromise blood flow to a higher degree than SR repair. The aim of this experimental study was to evaluate the effect of a DR and a SR technique on tendon blood flow in a sheep model. Methods: Eighteen sheep underwent detachment and immediate repair of the infraspinatus tendon using either a Mason-Allen or a suture-bridge technique. Tendon blood flow was measured using laser Doppler flowmetry before detachment, immediately after repair and 12weeks thereafter. Six regions of interest were measured, three over the lateral and three over the medial aspect of the footprint. Results: Immediately after repair, tendon blood flow decreased significantly in both repair groups (P=0.004). In the SR group, blood flow decreased by 100.1 arbitrary units (AU) (83.6%) after repair, in the DR by 81.4 AU (90.5%). Subgroup analysis showed blood flow over the lateral aspect of the footprint decreased by 126.3 AU (92.2%) in the SR and 84.4 AU (90.9%) in the DR group, whereas over the medial aspect, it decreased by 73.9 AU (72.0%) in the SR and 78.5 AU (90.1%) in the DR group. None of the differences between the groups were significant. At 12weeks, measured blood flow in the DR group had increased to 90.1 AU (100.2%) compared to the native tendons and was at 72.5 AU (60.5%) for the SR group. Again, the difference between SR and DR group was not statistically significant (n.s.). Assessment for retears showed that 4 of 8 tendons (50%) in the DR group and 3 of 9 tendons (33.3%) in the SR group had to be classified as re-ruptures. Conclusion: Suture anchor repair leads to an intraoperative decrease in tendon blood flow regardless of the repair technique. A significant difference between SR and DR repair was not found. These findings indicate that tendon blood flow should not be a factor to determine the use of either repair technique over the other. Springer-Verlag Berlin Heidelberg, 2013 Rotator cuff nationallicence Tendon blood flow nationallicence Double-row nationallicence Suture-bridge nationallicence Sheep nationallicence Laser Doppler flowmetry nationallicence LDF nationallicence Tendon contact pressure nationallicence Liem Dennis Department of Orthopedics and Tumor Orthopedics, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany aut Dedy Nicolas Department of Orthopedics and Tumor Orthopedics, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany aut Hauschild Gregor Department of Orthopedics and Tumor Orthopedics, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany aut Gosheger Georg Department of Orthopedics and Tumor Orthopedics, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany aut Meier Shirin Department of Orthopedics and Tumor Orthopedics, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany aut Balke Maurice Department of Trauma and Orthopedic Surgery, Cologne-Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany aut Spiegel Hans-Ulrich Department of General and Visceral Surgery, University Hospital Muenster, Muenster, Germany aut Marquardt Bjoern Orthopedic Practice Clinic, Muenster, Germany aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/2(2015-02-01), 470-477 0942-2056 23:2<470 2015 23 167 https://doi.org/10.1007/s00167-013-2429-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-013-2429-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liem Dennis Department of Orthopedics and Tumor Orthopedics, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany aut NATIONALLICENCE 700 1- Dedy Nicolas Department of Orthopedics and Tumor Orthopedics, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany aut NATIONALLICENCE 700 1- Hauschild Gregor Department of Orthopedics and Tumor Orthopedics, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany aut NATIONALLICENCE 700 1- Gosheger Georg Department of Orthopedics and Tumor Orthopedics, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany aut NATIONALLICENCE 700 1- Meier Shirin Department of Orthopedics and Tumor Orthopedics, University Hospital Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany aut NATIONALLICENCE 700 1- Balke Maurice Department of Trauma and Orthopedic Surgery, Cologne-Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany aut NATIONALLICENCE 700 1- Spiegel Hans-Ulrich Department of General and Visceral Surgery, University Hospital Muenster, Muenster, Germany aut NATIONALLICENCE 700 1- Marquardt Bjoern Orthopedic Practice Clinic, Muenster, Germany aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/2(2015-02-01), 470-477 0942-2056 23:2<470 2015 23 167