Risk Factors of Past Injuries among of the Rowing Athletes Who Participated in the National Sports Festival / 대한스포츠의학회지

The purposes of this study were basic data collection and evaluation of the risk factors regarding rowing injuries through an epidemiologic study. We performed a questionnaire survey from rowers who participated in the 91th Annual Sports Festival in Jinju, Gyeongnam, in October 2010. 145 rowers (male: 84, female: 61) responded to the survey. The t-test was used for comparisons for the type of injury, age, and gender. The multiple linear regression analysis and the logistic regression analysis was used for the evaluation of risk factors. Overall, 100 (69.0%) rowers had a history of injury. The incidence of overuse injuries was significantly higher than the incidence of traumatic injuries (2.07+/-2.59/rower vs. 1.46+/-2.08/rower, p=0.027). The incidence of injuries for the adult group was significantly higher than those in the youth group (4.42+/-4.45/rower vs. 2.61+/-3.63/rower, p=0.008). There was no significant difference between males and females (3.85+/-4.33/rower vs. 3.08+/-3.87/rower, p=0.275). Also, the incidence of cross-training related injury was significantly higher in traumatic injuries rather than in overuse injuries (0.92+/-1.54/rower vs. 0.5+/-1.07/rower, p=0.008). In addition, rowing injuries were more related with overuse injuries. Risk factors regarding overall rowing injuries were training time, and training using stairs. Traumatic injuries were related with diverse cross-training and time spent cross-training. Therefore, in order to reduce the incidence of rowing injuries, time and the number of cross-training sessions should be reduced. Moreover, highly risky training such as using stairs should be replaced with other low risk training methods.

The Follow Up Results of Residual Spinoglenoid Ganglion Cyst after Arthroscopic Decompression and Superior Labral Repair: Cases Report

PURPOSE: There are many known treatment modalities for spinoglenoid ganglion cyst accompanied by suprascapular nerve palsy. However, to the author's knowledge, there is no report on the follow-up outcomes focused on remnant cysts. MATERIALS AND METHODS: Six (n=6) patients with spinoglenoid ganglion cyst accompanied by suprascapular nerve palsy, with a mean follow-up of 15 months (12-23months) following arthroscopic cyst decompression and superior labral repair, were enrolled. Residual cyst was investigated by ultrasonography and MRI. RESULTS: Immediate postoperative ultrasonography revealed complete remission of ganglion cyst in one patient and reduced ganglion cyst size in five patients. Three-month follow-up ultrasonography showed spontaneous complete remission of the residual cysts in all patients. No recurrence on MRI was seen at one-year follow-up. CONCLUSION: Residual spinoglenoid ganglion cyst remaining after arthroscopic decompression and superior labral repair tends to resolve spontaneously within 3 months of surgery.

Poland Syndrome: A Case Report

PURPOSE: Poland syndrome is rare disease which is characterized by absence of unilateral pertoralis major muscle accompanied by ipsilateral syndactyly or brachydactyly, which was described first by Alfred Poland in 1841. MATERIALS AND METHODS: We performed the physical examination, laboratory test and radiologic evaluation to 18 year old male, who complaint asymmetry of right anterior chest. RESULTS: We diagnosed the Poland syndrome due to absence of right pectoralis major muscle and brachydactyly of right hand. CONCLUSION: Current authors report a patient who had hypopalsia of pectoralis muscles, which needed differential diagnosis with pectoralis major rupture.

Biological Characteristics of Rotator Cuff Tendon

PURPOSE: Rotator cuff disease is the most common shoulder disease. Rotator cuff tear, which is related to cuff tendon degeneration, is commonly encountered in clinical practice. MATERIALS AND METHODS: Knowledge about the biology of the normal rotator cuff is fundamental to understanding the pathophysiology of and degenerative processes in rotator cuff tendon tears. Furthermore, such basic knowledge provides a rationale for and facilitates the development of treatment modalities. RESULTS AND CONCLUSION: Therefore, we reviewed the biology of the normal rotator cuff tendon, theories to explain the pathophysiology of rotator cuff tendon tear, and current research on apoptosis of rotator cuff tenofibroblasts.

Vascular Injury Associated with Blunt Trauma without Dislocation of the Knee

Failure to recognize popliteal artery injury and restore vessel continuity of flow after blunt trauma is a major cause of lower extremity amputation and morbidity. A high index of suspicion and early recognition of the injury are paramount for limb salvage. We experienced a rare case of poplitial artery occlusion with the presence of arterial pulses due to collateral circulation after blunt trauma. Expeditious revascularization was achieved by using posterior approach, allowing two surgical teams to work simultaneously. This case illustrates that, even in the absence of knee dislocation, surgeons must always consider the possibility of a popliteal artery damage whenever a blunt trauma near the knee.

Vascular Injury Associated with Blunt Trauma without Dislocation of the Knee

Failure to recognize popliteal artery injury and restore vessel continuity of flow after blunt trauma is a major cause of lower extremity amputation and morbidity. A high index of suspicion and early recognition of the injury are paramount for limb salvage. We experienced a rare case of poplitial artery occlusion with the presence of arterial pulses due to collateral circulation after blunt trauma. Expeditious revascularization was achieved by using posterior approach, allowing two surgical teams to work simultaneously. This case illustrates that, even in the absence of knee dislocation, surgeons must always consider the possibility of a popliteal artery damage whenever a blunt trauma near the knee.

The Short Term Clinical Follow-up Study for Hemiarthroplasty in Proximal Humeral Fracture

Introduction: The treatment of proximal humeral fracture is traditionally determined by Neer's classification system. The severely displaced three-part or four-part fracture is an indication for primary hemiarthroplasty. The current authors report the clinical results of 10 patients who received hemiarthroplasty for proximal comminuted fractures. The minimum follow-up period was 12 months. Materials and Methods: The current authors studied 10 patients who, between July 1999 and March 2005, each received hemiarthroplasty for a proximal humeral fracture of one shoulder. According to Neer's classification system, 5 of the patients had three-part fractures, and 5 of the patients had 4-part fractures. The mean interval between trauma and hemiarthroplasty was 6.1 days. The mean age of the 6 female and 4 male patients was 67.4 years (range: 56 to 76). Shoulder function was evaluated using the Constant score, the Simple Shoulder Test, and the modified UCLA score. Results: The mean Constant score was 51.4(range: 34 to 60). The mean modified SST score was 7.8 out of 12 tasks. Excluding the one patient who had also sustained an axillary artery rupture and a brachial plexus injury after the initial trauma, the mean Constant score for the remaining 9 patients was 53.5(range: 44 to 60), and the mean SST score was 7.2 tasks. The modified UCLA score averages for pain, function, and active forward flexion and strength were, respectively, 8.2(6~10), 6.6(2~8), and 6.9(4~8). The total UCLA score was an average of 21.7(12~26). Patients' the modified UCLA ratings were as follows: Excellent: 3, Good: 6, and Poor: 1. The patient with the poor outcome was the one who had also sustained the neurovascular injury. Patient's subjective satisfaction rating were as follows: Excellent: 2, Good: 7, and Poor: 1. Conclusion: Based on short term follow-up results, this study indicates that hemiarthroplasty is the treatment of choice for proximal humeral fractures on which it would be difficult to perform open reduction and internal fixation. Hemiarthroplasty is a useful treatment modality to prevent shoulder stiffness and to allow daily living tasks in elderly patients. However, restoration of muscle power and range of joint motion were not recovered satisfactorily.

The Short Term Clinical Results of Hemiarthroplasty to Treat Humeral Head Osteonecrosis

INTRODUCTION: While uncommon, humeral head osteonecrosis is an indication for arthroplasty when the humeral head collapse is advanced. The current authors report the short-term clinical results of 7 hemiarthroplasties to treat humeral head osteonecrosis. MATERIALS AND METHODS: This study focused on 7 reconstructed shoulders of 5 patients whose humeral head osteonecrosis was treated with hemiarthroplasty. The postulated causes were alcohol-induced (4 cases) and steroidinduced (3 cases). The minimum follow-up was 12 months. This study compared the preoperative and postoperative shoulder pain, range of motion, and ASES scores. The postoperative patient satisfaction was assessed. RESULTS: The level of pain during exercise was reduced from a preoperative average of 7.6 to a postoperative average of 1.9. The range of motion, in terms of forward flexion, abduction, and external rotation, improved from preoperative averages of 105.7degrees, 80degrees, and 22.1degrees to postoperative averages of 146.6degrees, 139.3degrees, and 44.3degrees, respectively. The ASES scores increased from a preoperative mean of 39.0 to a postoperative mean of 84.1. The patients' ratings of the outcomes were excellent (5 cases) and good (2 cases). CONCLUSIONS: These short-term results indicate that hemiarthroplasty is a reliable treatment method for humeral head osteonecrosis improving shoulder pain, range of motion, and patient satisfaction.