• Clinics in Shoulder and Elbow
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• v.11 no.2
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• pp.71-76
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• 2008

The pathophysiology of rotator cuff tears and the progression of asymptomatic tears to symptomatic tears are yet unclear and much controversy. It is likely to involve a number of factors such as a genetic predisposition, extrinsic impingement from structures surrounding the cuff and intrinsic degeneration from changes within the tendon itself. Degenerative changes in the rotator cuff with aging seem to be related to the anatomic and mechanical environment of the rotator cuff. The histopathologic appearance of rotator cuff tendon rupture specimens demonstrates a consequence of degenerative changes at the site of tendon insertion into bone. It weakens the tensile strength of the tendon. Is the process of degeneration intrinsic or extrinsic in nature? I suggest that degeneration is intrinsic and not caused by extrinsic factors. Even though, rotator cuff tear may be secondary to multiple factors, I believe that primary cause of rotator cuff tears is preexisting degenerative change.

• Journal of Korean Orthopaedic Sports Medicine
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• v.4 no.1
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• pp.49-54
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• 2005

Purpose: Complete rupture of metacarpophalangeal ulnar collateral ligament of thumb needs surgical exploration and repair, owing to the interposition of the adductor aponeurosis (Stener lesion) which interferes in healing process. We performed arthroscopic diagnosis and treatment on ulnar collateral ligament injury of thumb and evaluated it's efficiency. Materials and Methods: Arthroscopy was perfomed on 13 patients of whom injured on complete ruture of metacarpophalangeal ulnar collateral ligament. Follow-up period was over 1 year and mean age was 35.6 years old. Ulnar collateral ligament tears and Stener lesion were diagnosed and treated by arthroscopy procedure. Results were interpreted by joint instability, pinch power, grip power and range of motion on metacarpophalangeal joint of thumb. Results: We found 5 Stener lesions in 13 cases. There was no appreciable postoperative instability. Pinch and grip power were recovered to 92%, 94% of uninjured thumb respectively. Range of motion on metacarpophalangeal joint was mean $52^{\circ}$, almost equal to uninjured thumb. Conclusions: Arthroscopic treatment in metacapophalangeal ulnar collateral ligament injury of thumb is useful method that Stener lesion can be clearly comfirmed and treated. Also soft tissue injuries can be minimized, thereby early functional recovery can be expected.

• Journal of Korean Orthopaedic Sports Medicine
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• v.10 no.2
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• pp.117-120
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• 2011

Avulsion rupture of the flexor digitorum profundus tendon at the distal phalanx is a rare injury. It usually occurs during extension of the DIP joint, while the flexor digitorum profundus tendon is contracted, or when strong extension force is applied, to the distal phalanx. We experienced a patient, combat policeman who had avulsion rupture of flexor digitorum profundus tendon at the distal phalanx after 2 days of combat exercise. Here, we would like to report unusual case of rare tendon injury with studies from other papers.

• Journal of Korean Orthopaedic Sports Medicine
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• v.10 no.2
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• pp.133-136
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• 2011

The medial meniscal root tear is relatively common internal derangement of knee that is occurred in middle age without trauma. We experienced a case of traumatic medial meniscal root tear in 11 years old child and repaired it with a metallic suture anchor. Thus we report this case with a review of current literature.

• Journal of the Korean Arthroscopy Society
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• v.2 no.1
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• pp.101-106
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• 1998

일반적으로 견관절의 전방안정력은 하관절와상완인대에서 주역할을 하며, 불안정성으로 인한 병변은 관절순과 골관절와사이의 분리(Bankart lesion)로 나타난다고 한다. 중관절와상완인대는 특히 중등도의 외전위치에서 견관절의 전방안정성에 중요한 역할을 하는 정적 안정물로써, 다른 관절와상완인대의 동반손상없이 단독으로 파열된 례는 문헌고찰상 보고된 바가 없었다. 본 증례의 경우 특별한 외상력없이 내원 1년전부터 우측 견관절의 전방 불안정성과 동통성운동제한의 소견을 보였으며 상기 증상은 3개월 전부터 점차 악화되었다. 관절경 소견상 관절와순 부착부위에서 파열된 중관절와상완인대를 확인할 수 있었으며 동반된 관절와순의 부분파열 및 관절와관절면의 미란을 확인할 수 있었다. 파열된 중관절와상완인대와 비후된 활막을 변연절제 후 8개월 정도의 단계적 재활운동을 시행하였으며 동통과 관절운동의 회복소견을 볼 수 있었다. 본저자들은 관절경검사상 중관절와상완인대의 단독파열소견을 보인 39세의 여교사를 치료하였으며 그 결과를 문헌고찰과 함께 보고하는 바이다.

• Journal of Chest Surgery
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• v.32 no.4
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• pp.394-398
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• 1999

Background: According to the changes in the Environmental factors, traumatic diaphragmic rupture is seen in increasing frequency. Many reports described the early diagnostic methods and treatment modalities. In our institution, a study was retrospectively performed to obtain the early diagnostic and treatment methods of diaphragmic ruptures. Material and Method: From January 1994 to April 1998, 20 patients with traumatic rupture of the diaphragm were treated in our institution and We analyzed the patients in preoperative clinical presentations, diagnostic accuracies, associated injuries and postoperative complications. Result: Socially active male patients were affected most. 75% of patients had blunt trauma and 25% had penetrating injury. There were 16 cases of ruptured right diaphragm, 3 cases of left diaphragm and 1 case on both. Preoperative diagnosis were possible in 10 patients (50%) and 6 patients(30%) were diagnosed intraoperatively, but 4 patients (20%) were diagnosed in the late stages. Most common postoperative complication was wound infection, and two died of associated injuries. Conclusion: We conclude that if there is suspicion of diaphragmic rupture after a trauma, careful study and examination is essential and interdepartmental collaboration is very important.

• Fire Science and Engineering
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• v.26 no.3
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• pp.91-99
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• 2012

Fatal injuries and deaths have occurred resulting from the operation or disassembling of a powder extinguishers in Korea. If a rusted powder extinguisher is exploded during operation or disassembling, it rises to the air like a rocket and hits a head, chest, or neck part of an operator, resulting in his (her) death or injury. In this study examines the explosion accident cases of a powder fire extinguisher and analyzes their causes, reactions to explosion, and precautionary measures. And in this paper suggests 1) no using of old fire extinguishers in fire drill or education, 2) education and public information on danger of old fire extinguishers, 3) indication of explosion danger to cartridge-type dry chemical powder fire extinguishers had already placed to buildings etc., 4) obligatory indication of durable years on fire extinguishers, 5) examination for introduction of system that do hydraulic pressure test about fire extinguishers that given period past, 6) construction of system that reclaim old fire extinguishers, 7) construction of system that recycle or reuse old fire extinguishers, and 8) operation of help desk related to old fire extinguishers as precautionary measure of fire extinguisher explosion accidents.

• Clinics in Shoulder and Elbow
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• v.13 no.2
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• pp.181-187
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• 2010

Purpose: To determine clinical results for arthroscopic repair of a full-thickness rotator cuff tear using a suture bridge technique. Materials and Methods: Between November, 2007 and October, 2008, we evaluated 90 cases of arthroscopic middle, large rotator tear cuff repair. The mean follow-up period was 15 months (range, 12-23 months). Forty-three cases had medium-sized tears; 47 cases had large-sized tears. At the preoperative stage and again at last follow-up, functional results were assessed by the KSS, ASES, UCLA and the PVAS (Pain visual analogue score). Results: Pain score improved from 2.56 preoperatively to 0.96 at final follow-up; movement scores improved from 6.94 to 1.70. At. final follow-up, the average UCLA score improved from 17.08 to 31.17 with 31 excellent (34%), 49 good (54%) and 10 poor results (12%). The final UCLA score was 31.47 in the group less than 60 years of age and 30.69 in the group over 61 years of age (p=0.344). The UCLA score was 31.23 in those with medium-sized tears and 31.11 in those with large-sized tears (p=0.924). The UCLA score was 31.10 in non-trauma patients and 31.23 in trauma patients (p=0.929). Conclusion: Arthroscopic repair of a full-thickness rotator cuff tear using a suture bridge technique can produce excellent clinical results. These outcomes are not affected by age or trauma history.

• Journal of Chest Surgery
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• v.41 no.5
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• pp.647-650
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• 2008

Aortic disease usually recurs after aortic surgery in the form a new aneurysm distal to the previous operation site, and finding a penetrating atherosclerotic ulcer proximal to the previous operation site has rarely been reported. We report here on a case of successful patch repair of a ruptured penetrating ulcer in the distal aortic arch, and this developed late after replacement of the descending thoracic aorta.

• Journal of the Korean Arthroscopy Society
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• v.9 no.2
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• pp.214-217
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• 2005

Meniscal cyst is an uncommon disease of knee joints, arising less frequently from medial meniscus than lateral. Most of they are accompanied with horizontal tear of meniscus. This is the case of 24 year old man who had 2 separate medial meniscal cysts with longitudinal tear on posterolateral side of medial meniscus without trauma. Treatment consisted of arthroscopic decompression of cysts and meniscal repair.