Objective To evaluate the clinical results of arthroscopic repair of massive rotator cuff tear. Methods The study involved 16 patients with massive rotator cuff tears treated arthroscopically from September 2007 to June 2009. There were 6 males and 11 females at average age 61.5 years (45-75 years). The rotator cuff tears was repaired with arthroscopic double-row reconstruction. The range of motion, pain, strength of flexed elevation and function evaluation score were all recorded before operation and at final follow-up. The results were evaluated by t test and compared according to age and course of disease. Results All patients were healed without complications and the outcome was improved significantly ( P < 0.01 ). The mean VAS score was improved from preoperative 5.6 to postoperative 1.7,the average forward flexion from 69. 1°to 151.2°, the average external rotation from 14.7° to 32.2°, and internal rotation from L1 level to T10, the mean Constant-Murle from 39 to 85, the mean UCLA from 10.4 to 28, the mean SST from 2.8 to 8.8 and the strength of flexed elevation from 10.7% of normal side to 65.0%. Compared with preoperation, there was statistical difference in aspects of pain, range of motion, muscle strength and function in postoperation (P < 0.01 ). Conclusion Arthroscopic doublerow fixation can attain satisfactory results in repair of massive rotator cuff tear.

BACKGROUND:Reducing blood loss could help to prevent the complications of total knee arthroplasty, relieve the swelling and discomfort postoperatively and accelerate the rehabilitation. OBJECTIVE:To explore the methods for reducing blood loss during total knee arthroplasty. METHODS:Totally 63 patients undergoing primary unilateral total knee arthroplasty were divided into two groups. Group 1 included 27 patients who received the conventional surgical techniques using tourniquet during the whole procedure with wound drainage, as control group. Group 2 included 36 patients who received the modified procedure only using tourniquet during prosthesis implantation without wound drainage, as experimental group. In the experimental group, we stitched the capsule closely. The preoperative and postoperative hemoglobin, decrease of hemoglobin, knee pain score, range of motion blood transfusion rate and wound healing were compared between the two groups. RESULTS AND CONCLUSION:(1) There was no significant difference in preoperative hemoglobin between the two groups. At 1, 4 and 7 days postoperatively, the hemoglobins were significantly lower in the control group than in the experimental group, and the decreases of hemoglobins were significantly lower in the control group than in the experimental group. (2) Knee pain score was not significantly different between the two groups. (3) The range of motion of the knee was significantly larger in the experimental group than in the control group at 7 days. (4) Blood transfusion rate was 18.5%in the control group, and wound healing was poor in one patient. There was no transfused case and wound problem in the experimental group. All wounds were healed normally. (5) There was no infection or hematoma in two groups. (6) With the modified procedure, we could reduce blood loss during total knee arthroplasty without blood transfusion after surgery, which was helpful to postoperative rehabilitation.

Objective To evaluate the efficacy of bone marrow fenestration technique used for ro-tator cuff repair at the foot-print zone of rotator cuff under arthroscopy. Methods A total of 30 patients with full-thickness rotator cuff tear ( from 3 cm to 5 cm) were enrolled for this retrospective study who had been treated at Department of Orthopaedics, The People's Hospital of North Jiangsu from January 2015 to December 2016. Of them, 15 were treated under arthroscopy with simple suture bridge technique ( SB group ) and the other 15 under arthroscopy with bone marrow fenestration and suture bridge techniques ( BMSB group ) . The 2 groups were compared in terms of visual analogue scale ( VAS ) , American Shoulder and Elbow Surgeons ( ASES ) scale, Constant scores,range of motion of the affected shoulder and rate of retear after surgery. Results All the patients received follow-up for 11 to 14 months. Significant improvements were achieved in both groups in VAS scores at 3 months ( 1.9 ± 0.6 and 0.9 ± 0.6 ) , ASES scores ( 90.7 ± 3.6 and 92.3 ± 4.2 ) and Constant scores ( 88.9 ± 2.5 and 87.4 ± 3.4 ) at the last follow-up, compared with the preoperative values ( 4.7 ± 1.1 and 4.3 ± 1.5, 58.2 ± 7.2 and 55.6 ± 4.4, and 57.3 ± 6.7 and 55.9 ± 10.3, respectively) ( P ＜0.05), but there were no significant differences between the 2 groups in ASES scores, Constant scores or range of motion of the affected shoulder at the last follow-up ( P＞ 0.05). The VAS scores at 3 months for the BMSB group (0.9 ± 0.6) were significantly lower than that for the SB group (1.9 ± 0.6) ( P ＜0.05). There was no significant difference either between the 2 groups in the retear rate [ 20.0% ( 3/15 ) for SB group versus 26.7% ( 4/15 ) for BMSB group ] ( P ＞ 0.05 ) . Conclusion Application of bone marrow fenestration technique in addition to suture bridge technique can obviously relieve pain after rotator cuff repair, though it shows no advantage in functional recovery of the shoulder joint.

Objective:To investigate the clinical efficacy of Dog-Bone double button in the treatment of acute acromioclavicular dislocation under shoulder arthroscopy.Methods:A retrospective analysis was conducted of the 20 patients with acute acromioclavicular dislocation who had been treated at Department of Sports Medicine, Northern Jiangsu People's Hospital of Jiangsu Province from November 2018 to December 2020 by Dog-Bone double button under shoulder arthroscopy. They were 11 males and 9 females, aged from 31 to 63 years. Recorded were their visual analogue scale (VAS), Constant-Murley shoulder function score and range of shoulder anteflexion at preoperation and the last follow-up, as well as complications and the X-ray parameters at one month postoperation and the last follow-up [including coracoclavicular distance (CCD), distance between the upper and lower Dog-Bone titanium plates (DDD), angle between the coracoid process tunnel and the tangent line of the superior clavicle (CTCA), and widths of the clavicle tunnel and the coracoid process tunnel].Results:The 20 patients were followed up for 6 to 12 months (average, 10.5 months). Their preoperative VAS score, Constant score, and range of shoulder anteflexion were 3.0 (3.0, 4.0), 57.0 (54.3, 61.5) and 130° (110°, 140°), which were significantly improved to 0 (0, 0.8), 90.0 (86.5, 91.0) and 170° (170°, 180°) at the last follow-up ( P<0.05). Their CCD, DDD, CTCA, and widths of the clavicle tunnel and the coracoid process at one month postoperation were (5.0±1.0) mm, (32.4±3.5) mm, 91.7° (88.5°, 104.9°), 3.0 (3.0, 3.0) mm and 3.0 (3.0, 3.0) mm, which were significantly improved to (6.3±1.3) mm, (32.8±3.7) mm, 84.8° (81.8°, 92.0°), 3.5 (3.4, 3.6) mm and 3.2 (3.1, 3.3) mm with the exception of DDD at one month postoperation ( P<0.05). The last follow-up observed postoperative reduction loss in only one patient. Conclusion:For acute acromioclavicular joint dislocation, the Dog-Bone fixation technique under shoulder arthroscopy can lead to fine surgical efficacy and patient satisfaction, because it has advantages of limited trauma, good functional recovery of the shoulder, and effective prevention of reduction loss.

Objective:To compare the clinical efficacy between reservation and sacrifice of remnants in the footprint area in arthroscopic repair of rotator cuff tear.Methods:A retrospective study was conducted to analyze the clinical data of 32 patients with rotator cuff tear plus remnants in the footprint area (2 cm < tear size <5 cm) who had been admitted to Department of Sports Medicine, The People's Hospital of Northern Jiangsu from May 2020 to July 2021. The patients were divided into 2 groups according to reservation or sacrifice of remnants in the footprint area in arthroscopic repair of rotator cuff tear. In the remnant-reservation group (16 cases): 5 males and 11 females with an age of (61.8±9.9) years, 9 left and 7 right shoulders affected, and (3.7±1.1) cm in size of rotator cuff tear; in the remnant-sacrifice group (16 cases): 4 males and 12 females with an age of (61.3±8.8) years, 8 left and 8 right shoulders affected, and (3.9±0.9) cm in size of rotator cuff tear. The 2 groups were compared in terms of visual analogue scale (VAS), American Shoulder and Elbow Surgeons (ASES) score, Constant-Murley shoulder function score (Constant score), and range of motion of the affected shoulder before surgery, 3 months after surgery and at the last follow-up. The ratio of bilateral abductor muscle strengths (affected side/healthy side) was analyzed and compared between the 2 groups, and the healing of the rotator cuff was evaluated by MRI at the last follow-up.Results:The 2 groups were comparable because there were no significant differences in all their preoperative demographic data ( P>0.05). The 32 patients were followed up for (14.3±3.5) months after surgery. At 3 months after surgery, the VAS score in the remnant-reservation group [1.0 (0.0,1.0) point] was significantly lower than that in the remnant-sacrifice group [1.0 (1.0,1.0) point] ( P<0.05), but there was no significant difference between the 2 groups in ASES score, Constant score or range of motion of the affected shoulder ( P>0.05). At the last follow-up, the ASES score, forward flexion, abduction and ratio of bilateral abductor muscle strengths (affected side/healthy side) in the remnant-reservation group [(96.1±4.8) points, 170.0 (170.0,170.0)°, 160.0 (160.0,170.0)°, and 85.5%±13.8%]were significantly better than those in the remnant-sacrifice group [(91.4±5.9) points, 160.0 (160.0,170.0)°, 150.0 (140.0,155.0)°, and 72.6%±16.9%] ( P < 0.05), but there were no statistically significant differences between the 2 groups in VAS score, Constant score, neutral external rotation angle, or body-side internal rotation ( P>0.05). The Sugaya grading for MRI rotator cuff healing was significantly different between the 2 groups at the last follow-up ( P<0.05). Conclusion:In arthroscopic repair of rotator cuff tear, reservation of remnants in the footprint area can significantly relieve postoperative shoulder pain, and has obvious advantages in restoration of shoulder forward flexion, abduction and abductor muscle strength, leading to better healing of the rotator cuff and the large nodule than the remnant-sacrifice technique.

Objective To evaluate the short-term clinical effect of arthroscopic repair of rotator cuff injury with all-suture anchor using a prospective and single-cohort clinical trial.Methods Twenty-five patients with rotator cuff injuries(1.5 cm0.05).Conclusion Arthroscopic rotator cuff repair with all-suture anchor is feasible and safe,and has good short-term clinical effect.