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Preoperative Pain Control in Arthroscopic Rotator Cuff Repair: Does It Matter?
Hisahiro Tonotsuka,Hiroyuki Sugaya,Norimasa Takahashi,Nobuaki Kawai,Hajime Sugiyama,Keishi Marumo 대한정형외과학회 2019 Clinics in Orthopedic Surgery Vol.11 No.2
Background: The purpose of this study was to clarify the importance of preoperative pain control using corticosteroid injections in patients with persistent rest pain (RP) before arthroscopic rotator cuff repair (ARCR). Methods: A total of 360 patients (374 shoulders) who underwent primary ARCR and were followed up for at least 2 years were enrolled. After one-to-one propensity score matching, 266 patients (145 men and 128 women, 273 shoulders) were included in the study. Their mean age was 65.2 ± 7.7 years (range, 42 to 88 years) at the time of surgery. The patients were divided into three groups: those who required several intra-articular or subacromial bursa corticosteroid injections preoperatively for refractory RP (group A+), those in whom RP was resolved preoperatively (group A−), and those who had no RP and did not require any injections (group B). The incidence of postoperative RP and preoperative and final follow-up American Shoulder and Elbow Surgeons (ASES) scores were compared among the three groups. Results: The incidence of postoperative RP was significantly higher in group A+ (35/91 cases, 38.5%) than in group A− (10/91, 11.0%) and group B (7/91, 7.7%, p < 0.001 for both). The preoperative ASES score was significantly lower in group A+ (33.2 ± 14.2) than in group A− (53.9 ± 11.9) and group B (62.3 ± 11.2, p < 0.001 for both), and it was significantly lower in group A− than in group B (p = 0.000). The final follow-up ASES score was significantly lower in group A+ (92.1 ± 8.4) than in group A− (97.6 ± 5.4) and group B (99.0 ± 2.5, p < 0.001 for both). There was no significant difference in the final follow-up ASES score between group A− and group B (p = 0.242). Conclusions: Patients in whom preoperative RP could be resolved before surgery achieved postoperative outcomes comparable to those in patients who had no RP before surgery, whereas the outcomes in patients with refractory preoperative RP were inferior. The results suggest that preoperative pain control is important in patients undergoing ARCR.
NMR Study of Successive Magnetic Transitions in the A-site Ordered Perovskite LaMn3Cr4O12
Yu Kawasaki,Syota Takase,Yutaka Kishimoto,Takashi Ohno,Ikuya Yamada,Kentaro Shiro,Ryoji Takahashi,Kenya Ohgushi,Norimasa Nishiyama,Toru Inoue,Tetsuo Irifune 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
We have investigated the successive magnetic phase transitions of the A-site ordered perovskiteLaMn3Cr4O12 by measuring 139La nuclear magnetic resonance (NMR) spectra. The successivemagnetic transitions are revealed by a very small but clear increase in the full width at half maximum(FWHM) of the 139La NMR signal at TM2 = 150 K and by the disappearance of the signal due to theline broadening at temperatures below TM1 = 50 K. These two magnetic transitions are associatedwith independent orderings within the Cr-site sublattice at TM2 and within the Mn-site sublatticeat TM1. Regarding the magnetic structure of the Cr-site sublattice at temperatures below TM2, thecancellation of internal fields at the La site, ruling out ferromagnetic and multi-q antiferromagneticstructures, is consistent with the typical antiferromagnetic structure for perovskites, such as G-,A- and C-type orders. The uncanceled internal field at the La site at temperatures below TM1is also consistent with these typical antiferromagnetic structures in the Mn-site sublattice. Thedifferences in the temperature dependences of the Knight shift K(T) and the bulk susceptibility χ(T) are consistently explained by the independent magnetic orderings of the Cr- and the Mn-sitesublattices and the cancellation of internal field originating from the Cr-site sublattice at the Lasite at temperatures below TM2.