Biomecánica de las lesiones en hombro: Revisión bibliográfica crítica desde la perspectiva médico legal laboral / Biomechanics of shoulder injuries: Critical bibliographic review from the medical-legal-occupational perspective

Resumen La base fundamental de la valoración médico legal de un individuo es establecer la relación de causalidad entre la historia narrada por el mismo y los hallazgos documentados. La biomecánica del trauma es una herramienta que permite dilucidar dicha concordancia, ya que su estudio involucra los mecanismos de trauma implicados en la génesis de las distintas lesiones. Este artículo consiste en una revisión bibliográfica y crítica de la literatura actual en materia de etiopatogenia de las lesiones en hombro por su alta incidencia laboral y capacidad de generar secuelas.

Abstract The basis of the forensic evaluation of an individual is to establish the relationship of causality between the story that has been told by the patient and the documented findings. The study of injury biomechanics is a tool that helps to clarify said concordance, since it involves the trauma mechanisms that are implied in the genesis of the different lesions. This article consists of a bibliographical revision and critique of the current literature about the etiopathogenesis of the shoulder lesions, since they are frequent in the work place and can generate sequels.

Slap iv in overhead sports practice / Slap iv em atletas de suspensão

ABSTRACT Superior labral tear from anterior to posterior (SLAP) is the most common disease in overhead sports practice. Objective: to evaluate the functional outcome after tenodesis of long head biceps tendon (LHBT) in high-performance patients with isolated SLAP lesion refractory to conservative treatment. Methods: Patients underwent the same open repair procedure, using an interference screw. Results: Both patients presented good clinical results and returned to the sport with performance similar to that prior to the injury. Conclusion: The results favor the surgical treatment of these athletes with SLAP IV. Level of Evidence IV, Série de Casos.

RESUMO A lesão labral superior anteroposterior (SLAP) é a doença mais comum em atletas em suspensão do solo. Objetivo: avaliar o resultado funcional após tenodese do TCLB (tendão do cabo longo do bíceps) nos pacientes atletas em suspensão de alta performance com lesão SLAP isolada refratária ao tratamento conservador. Métodos: Os pacientes foram submetidos ao mesmo procedimento de reparo por via aberta, com uso de parafuso de interferência. Resultados: Ambos os pacientes apresentaram bons resultados clínicos e retornaram ao esporte com performance semelhante ao prévio à lesão. Conclusão: Os resultados favorecem o tratamento cirúrgico desses atletas com SLAP IV. Nível de evidencia IV, Series of Cases.

Follow-up Result in Repairing a Type II Superior Labrum Anterior and Posterior (SLAP) Lesion when Associated with Shoulder Impingement Syndrome / 대한정형외과학회잡지

PURPOSE: Type II superior labral anterior posterior (SLAP) lesions can occur in the setting of impingement syndrome. The authors compared the clinical results of patients who had undergone either an isolated acromioplasty or a combined type II SLAP repair and acromioplasty. MATERIALS AND METHODS: Between 2003 and 2008, a total of 75 cases of SLAP II lesions associated with impingement syndrome were recruited. In 39 patients, the type II SLAP lesion was repaired and acromioplasty was performed. In the other 35 patients, acromioplasty was performed alone. All patients were evaluated using the American Shoulder and Elbow Surgeons (ASES) questionnaire and range of motion. RESULTS: At an average of 33 months postoperatively, the ASES scores significantly increased in both groups (p<0.001) but the ASES score was similar in the 2 groups (p=0.278). However, there was a significant difference in the ASES scores when the competitive sports activity of the 2 groups of patients postoperatively were compared (p=0.014). The SLAP repair patients showed limited external rotation motion compared to the acromioplasty alone patients (p=0.026). CONCLUSION: There are no advantages in repairing a type II SLAP lesion when associated with impingement syndrome. However, type II SLAP lesions should be repaired in patients involved with competitive sports activity but the competitive sports activity should be limited for a better result.

New V-shaped Technique in SLAP Repair (Comparison of Cinical Results Between New V-shaped Repair and Conventional Rapair Technique in Arthroscopic Type II SLAP Surgery)

PURPOSE: The purpose of this study was to compare clinical outcomes between the new V-shaped repair method and conventional methods for the arthroscopic repair of Type II SLAP lesions. MATERIALS AND METHODS: Our study population consisted of 23 people treated with the new V-shaped repair method or conventional methods in the arthroscopic repair of Type II SLAP lesions at our institution between May 2006 and October 2008. Eleven shoulders were treated using the new V-shaped repair method. Twelve shoulders were treated using conventional methods. The average follow up period was 15 months. For evaluation of clinical results, we used UCLA and VAS pain scores. RESULTS: Comparing change scores (preoperative vs. postoperative states) there were no significant differences in UCLA score or VAS score between the two groups. CONCLUSION: The new V-shaped repair technique elicits similar clinical results with conventional arthroscopic repair techniques and thus can be considered a useful alternative when using an absorbable suture that is anchor linked with only one suture.

Arthroscopic Repair of Combined Bankart and SLAP Lesions: Operative Techniques and Clinical Results

BACKGROUND: To evaluate the clinical results and operation technique of arthroscopic repair of combined Bankart and superior labrum anterior to posterior (SLAP) lesions, all of which had an anterior-inferior Bankart lesion that continued superiorly to include separation of the biceps anchor in the patients presenting recurrent shoulder dislocations. METHODS: From May 2003 to January 2006, we reviewed 15 cases with combined Bankart and SLAP lesions among 62 patients with recurrent shoulder dislocations who underwent arthroscopic repair. The average age at surgery was 24.2 years (range, 16 to 38 years), with an average follow-up period of 15 months (range, 13 to 28 months). During the operation, we repaired the unstable SLAP lesion first with absorbable suture anchors and then also repaired Bankart lesion from the inferior to superior fashion. We analyzed the preoperative and postoperative results by visual analogue scale (VAS) for pain, the range of motion, American Shoulder and Elbow Surgeon (ASES) and Rowe shoulder scoring systems. We compared the results with the isolated Bankart lesion. RESULTS: VAS for pain was decreased from preoperative 4.9 to postoperative 1.9. Mean ASES and Rowe shoulder scores were improved from preoperative 56.4 and 33.7 to postoperative 91.8 and 94.1, respectively. There were no specific complication and no significant limitation of motion more than 10 degree at final follow-up. We found the range of motions after the arthroscopic repair in combined lesions were gained more slowly than in patients with isolated Bankart lesions. CONCLUSIONS: In recurrent dislocation of the shoulder with combined Bankart and SLAP lesion, arthroscopic repair using absorbable suture anchors produced favorable clinical results. Although it has technical difficulty, the concomitant unstable SLAP lesion should be repaired in a manner that stabilizes the glenohumeral joint, as the Bankart lesion can be repaired if the unstable SLAP lesion is repaired first.

Magnetic Resonance Arthrographic Findings of the Painful Hemiplegic Shoulder

OBJECTIVE: To identify the etiology of hemiplegic shoulder pain by magnetic resonance (MR) arthrography. METHOD: The study included seventy-four hemiplegic patients with shoulder pain. After several physical examinations, all patients had fluoroscopically guided injection by a physiatrist with a maximum of 12~15 ml of contrast agent. Then T1-weighted, T2-weighted and fat-suppressed T1-weighted images were taken at the oblique coronal plane. In addition, fat-suppressed T1-weighted images were obtained at the oblique sagittal and oblique coronal plane. RESULTS: Except for the 9 patients who did not finish the study, the mean age of the participants was 61.5+/-8.9 years and mean duration of the cerebrovascular accident (CVA) was 15.7+/-9.7 weeks. The findings were as follows: 40% supraspinatus tendinitis, 30.8% superior labrum anterior to posterior (SLAP) lesion, 29.2% adhesive capsulitis, 24.6% supraspinatus partial tear, 23.1% biceps tendinitis, 13.8% supraspinatus full thickness tear, 7.7% infraspinatus partial tear. The SLAP lesion had significant statistic relationship with biceps tendinitis (p<0.05) but not with rotator cuff lesion. CONCLUSION: We found that causes of hemiplegic shoulder pain were various. The prevalence of the SLAP lesion was high (30.8%). We recommend the MR arthrography when the hemiplegic shoulder pain does not improve by conventional therapy or the cause of the pain is uncertain.

Clinical Result of Arthroscopic Capsular Release and Repair for SLAP II Lesion with Stiffness

PURPOSE: We assessed the clinical results after the operative treatment of type 2 SLAP lesion with stiffness. MATERIALS AND METHODS: 13 patients who had SLAP lesion with stiffness were treated with arthroscopic capsular release, SLAP repair and treatment of the associated lesion. The average follow-up period was above 12 months. RESULTS: The postoperative mean VAS was scored 1.5 and the postoperative ROWE score was 92.3, which showed a significant improvement after the operation (P<0.001). The mean range of motion was a significantly improved after the operation (P<0.001). The ROWE score was excellent for all the cases. CONCLUSION: Arthroscopic capsular release and SLAP repair and treatment of the associated lesion in patients with type 2 SLAP lesion with stiffness are effective treatments for the increasing the range of motion and decreasing the pain.

Physical Examination in SLAP Lesion

With the increasing use of arthroscopy and MRI for the diagnosis of shoulder problems, SLAP (superior labrum from anterior to posterior) lesions are more commonly diagnosed, and the incidence of SLAP repair surgery is increasing. Clinical diagnosis of SLAP is difficult to achieve, and many specific physical exam maneuvers have been described. However, neither these exam maneuvers nor history can provide a definitive diagnosis of a SLAP lesion. Despite this limitation, it is helpful to establish a more precise and accurate examination and to construct a preoperative plan. The purpose of this article is to review the original descriptions for specific physical exam maneuvers in SLAP, along with statistical analysis where available. This will help clinicians in deciding which tests are useful, how they should be implemented, and how to interpret the results.

Arthroscopic Repair of Type II SLAP lesion with Bio-knotless Anchor

Purpose: This study reports the clinical results of the arthroscopic repair of type II SLAP lesion with bio-knotless anchor. Materials and Methods: 25 cases of 25 patients (20 male, 5 female) were included in this study. The average age was 44.5 years old. Preoperative ASES score was average 44. Arthroscopic SLAP repair with 1 or 2 bio-knotless anchors were performed in all cases. The average follow up period was 15 months. Results: The ASES score improved to average 92.7 at last follow up period and 23 cases had full range of motion of the shoulder. 2 case had mild limited range of motion of the shoulder without any problem in normal activity. Conclusion: Arthroscopic repair with bio-knotless anchor in type II SLAP lesion is one of the good methods because of the good clinical results.

Isolated SLAP Lesions of the Shoulder: Surgical Treatment and Outcome / 대한정형외과학회잡지

PURPOSE: To analyze the general characteristics of isolated SLAP (superior labrum anterior to posterior) lesions of shoulder and to evaluate efficacy of arthroscopic treatment. MATERIALS AND METHODS: We retrospectively reviewed 43 athletic patients with 46 isolated SLAP lesions. The mean follow-up period was 21 months, and mean patient age was 25 years. Twenty seven patients presented with injury to the dominant shoulder, and 3 had bilateral involvement. RESULTS: Pain and clicking were the most common symptoms. The mechanism of injury was assumed to be chafing in 27 cases, compression in 9 cases. Type 2 lesion was commonest (30 cases). The single most sensitive test was the compression-rotation test, which was positive in 92% of patients. The average UCLA score at the last follow-up was 31.6 points; 18 cases ranked as excellent and 21 as good.Postoperative performance data was obtained for in 27 athletes, 19 were able to return to their sports. CONCLUSION: Arthroscopic surgery for an isolated SLAP lesion resulted in 85% of patients being rated good or above, and 70% of athletic patients were able to resume sporting activity.

Arthroscopic Transglenoid Suture Technique ( Rhee's method ): Cadaveric Studies on Relationship between Pinning site and Neurovascular Structures / 대한정형외과학회잡지

Arthroscopic treatment of shoulder instability involves two techniques mainly, transglenoid suture technique and anterior anchoring system. However, anterior anchoring system has some disadvantages such as limited indication, high cost, technical difficulty and incapability to suture or reconstruct for all types of Bankart lesion. Disadvantages of transglenoid suture techniques are indirect suture tie, bump effect and possibility of the suprascapular nerve injury. The authors use modified transglenoid suture technique (Rhees method) for shoulder instability involving Bankart lesion, type II SLAP lesion and capsular laxity. The purpose of this study is to accurately describe the relationship between the major neurovascular structures and the pinning sites used in transglenoid suture technique (Rhees method). Placement of two or three arthroscopic Beath pinning sites was simulated in four fresh cadaveric shoulder specimens by placing Steinman pins into the glenoid rim under open field. The specimens were then dissected and the relationship of the pinning sites to the suprascapular nerve and suprascapular artery were recorded. In Bankart lesion repair, safe zone of pinning sites were 2 and 5 oclock in two portals in right shoulder, safe zone of pinning sites were 7 and 10 oclock in two portals in left shoulder. Safe direction of pinning was as possible as inferomedial side in scapula. In type II SLAP repair, safe zone of pinning sites were 2 oclock and just above 2 oclock of glenoid in right shoulder and 10 oclock and just above 10 oclock of glenoid in left shoulder. Safe direction of pinning was pararell to glenoid cavity and slightly superior in horizontal plane. From this study, these sites and directions appeared to be safe. Proper pinning depends on careful attention to the topographical anatomy about the shoulder.

Arthroscopic Treatment of SLAP Lesion / 대한정형외과학회잡지

This is retrospective study of the 18 patients of SLAP lesion which were found during arthroscopic treatment of 92 patients. The patients were diagnosed as recurrent shoulder dislocation (50 patients), shoulder impingement syndrome (36 patients) and SLAP lesion (four patients), clinically and radiologically, between March 1989 and June 1995. SLAP lesion were found in eleven patients with recurrent shoulder dislocation, three patients with impingement syndromes. Solitary SLAP lesions were found in four patients. Mean follow-up time was 36 months (range, 12 to 72 months) and average age of patients were 26 years old. Type I SLAP lesion by Snyder's classification were eight cases, type II were seven cases, type III were two cases and type IV was one case. Arthroscopic debridement of frayed or degenerated labrum and biceps tendon anchor were per formed in ten cases of type I and III. In type II and IV, six cases were repaired by arthroscopic placement of multiple suture, two cases were repaired by biodegradable tack (Suretac). The result were quantitated with Rowe rating scale. Eleven cases were exellent, four cases were good, and three cases were fair with Rowe rating scale. Our study revealed that these lesions were not uncommon in instability or impingement of shoulder. Type II SLAP lesion was frequently associated with anterior shoulder instability.