Authors: Hans-Wilhelm Mueller-Wohlfahrt, Lutz Haensel, Kai Mithoefer...

OBJECTIVE

To provide a clear terminology and classification of muscle injuries in order to facilitate effective communication among medical practitioners and development of systematic treatment strategies.

METHODS

Thirty native English-speaking scientists and team doctors of national and first division professional sports teams were asked to complete a questionnaire on muscle injuries to evaluate the currently used terminology of athletic muscle injury. In addition, a consensus meeting of international sports medicine experts was established to develop practical and scientific definitions of muscle injuries as well as a new and comprehensive classification system.

RESULTS

The response rate of the survey was 63%. The responses confirmed the marked variability in the use of the terminology relating to muscle injury, with the most obvious inconsistencies for the term strain. In the consensus meeting, practical and systematic terms were defined and established. In addition, a new comprehensive classification system was developed, which differentiates between four types: functional muscle disorders (type 1: overexertion-related and type 2: neuromuscular muscle disorders) describing disorders without macroscopic evidence of fibre tear and structural muscle injuries (type 3: partial tears and type 4: (sub)total tears/tendinous avulsions) with macroscopic evidence of fibre tear, that is, structural damage. Subclassifications are presented for each type.

CONCLUSIONS

A consistent English terminology as well as a comprehensive classification system for athletic muscle injuries which is proven in the daily practice are presented. This will help to improve clarity of communication for diagnostic and therapeutic purposes and can serve as the basis for future comparative studies to address the continued lack of systematic information on muscle injuries in the literature. WHAT ARE THE NEW THINGS: Consensus definitions of the terminology which is used in the field of muscle injuries as well as a new comprehensive classification system which clearly defines types of athletic muscle injuries.

LEVEL OF EVIDENCE

Expert opinion, Level V.

Topics: Athletic Injuries; Contusions; Humans; Muscle Fatigue; Muscular Diseases; Musculoskeletal System; Neuromuscular Diseases; Rupture; Sprains and Strains; Terminology as Topic

PubMed: 23080315
DOI: 10.1136/bjsports-2012-091448

Review

Authors: Gregory R Anderson, Heath P Melugin, Michael J Stuart...

CONTEXT

Hockey is a skillful contact sport with an elevated injury risk at higher levels of play. An understanding of injury incidence, type, mechanism, and severity at various levels of competition aids the clinician treating these athletes. The purpose of this clinical review is to discuss the epidemiology of hockey injuries at various levels of participation, including youth, high school, junior, college, and professional.

EVIDENCE ACQUISITION

A literature search was performed by a review of PubMed, Embase, and Cochrane databases and included articles published from 1988 to 2017. Studies were included in this review if determined to be of high quality and containing injury data relevant to the levels of competition. Pertinent data regarding ice hockey injury epidemiology and prevention at various levels of competition were analyzed.

STUDY DESIGN

Clinical review.

LEVEL OF EVIDENCE

Level 4.

RESULTS

Youth, high school, junior, college, and professional hockey players have unique injury patterns. Injuries occur much more often in a game compared with a practice, and injury risk increases with each level of competition. Preventative measures, such as mandatory facial protection and delayed body checking in games until age 13 years, are proven strategies to reduce the risk of facial injury and concussion.

CONCLUSION

An understanding of common injury types and mechanisms according to age and level of play aids the clinician in diagnosis and management. This information can also guide preventative strategies in the areas of education, coaching, rule enforcement, rule modifications, equipment improvement, and sportsmanship.

Topics: Athletic Injuries; Brain Concussion; Competitive Behavior; Contusions; Facial Injuries; Fractures, Bone; Head Protective Devices; Hockey; Humans; Incidence; Lacerations; Sprains and Strains; United States

PubMed: 31158326
DOI: 10.1177/1941738119849105

Review

Authors: Monika L Bayer, Abigail Mackey, S Peter Magnusson...

This review summarises the treatment of acute muscle injuries. Muscle injuries are frequent traumatic injuries caused by either excessive strain on the muscle tendon unit (strain injury) or a forceful blow to the muscle (contusion). An early start of rehabilitation after acute strain injuries is a key to shortening the time to return to sport. The application of ice, compression and elevation is well tolerated by patients, but there is no evidence that these methods enhance tissue repair. Complications after strain injuries include risk of recurrence, muscle atrophy and development of scar tissue. Ectopic bone formation may, however rarely, occur after severe contusion injuries.

Topics: Athletic Injuries; Contusions; Humans; Muscle, Skeletal; Muscular Atrophy; Muscular Diseases; Wound Healing

PubMed: 30821238
DOI: No ID Found

Authors: Ekim Sağlam Gürmen, Cumhur Murat Tulay

BACKGROUND

The objective of the study is to investigate diagnostic and clinical processes performed for cardiac contusion in patients with blunt thoracic trauma.

METHODS

This study was conducted retrospectively on 65 patients admitted with isolated blunt thoracic trauma to the Emergency Medicine Department. The CT images, the cardiac enzyme levels, the periodic 4-h follow-up electrocardiography (ECGs) in the emer-gency department, and the results of echocardiography, performed at admission and when required according to the clinical status, were investigated. The 1-h and 4-h high-sensitivity troponin I levels were studied, and values above 0.04 ng/ml were considered as positive.

RESULTS

Sixty-five patients with isolated thoracic trauma were included in the study, 23 (35.38%) had pulmonary and cardiac contu-sions both. In 23 (35.38%) patients, pulmonary contusion had been present, and cardiac contusion had not been identified at the initial evaluation. However, during clinical follow-up, troponin became positive, dysrhythmia developed, and the trauma affected the heart in four of these patients. In six (9.24%) patients, cardiac contusion was identified without pulmonary contusion. In 13 (20%) patients, no cardiac or pulmonary contusion was identified. troponin elevation was detected in 10 patients without a diagnosis of cardiac contusion who had a pulmonary contusion, hemothorax, and/or pneumothorax at the time of hospital admission and then with normal troponin levels at 4-h control. We found that there was a statistical agreement between cardiac contusion and troponin-ECG results at 4th h.

CONCLUSION

We advise that all blunt thoracic trauma patients should be screened for cardiac contusion by continuous ECG monitoring and troponin levels.

Topics: Attention; Contusions; Humans; Lung Injury; Myocardial Contusions; Retrospective Studies; Thoracic Injuries; Troponin I; Wounds, Nonpenetrating

PubMed: 35485460
DOI: 10.14744/tjtes.2021.11290

Authors: Haocheng Qin, Zhiwen Luo, Yaying Sun...

Low-intensity pulsed ultrasound (LIPUS, a form of mechanical stimulation) can promote skeletal muscle functional repair, but a lack of mechanistic understanding of its relationship and tissue regeneration limits progress in this field. We investigated the hypothesis that specific energy levels of LIPUS mediates skeletal muscle regeneration by modulating the inflammatory microenvironment. To address these gaps, LIPUS irritation was applied in for 5 min at two different intensities (30mW/cm and 60mW/cm) in next 7 consecutive days, and the treatment begun at 24h after air drop-induced contusion injury. In vitro experiments, LIPUS irritation was applied at three different intensities (30mW/cm, 45mW/cm, and 60mW/cm) for 2 times 24h after introduction of LPS in RAW264.7. Then, we comprehensively assessed the functional and histological parameters of skeletal muscle injury in mice and the phenotype shifting in macrophages through molecular biological methods and immunofluorescence analysis both and . We reported that LIPUS therapy at intensity of 60mW/cm exhibited the most significant differences in functional recovery of contusion-injured muscle in mice. The comprehensive functional tests and histological analysis indirectly and directly proved the effectiveness of LIPUS for muscle recovery. Through biological methods and immunofluorescence analysis both and , we found that this improvement was attributable in part to the clearance of M1 macrophages populations and the increase in M2 subtypes with the change of macrophage-mediated factors. Depletion of macrophages eliminated the therapeutic effects of LIPUS, indicating that improvement in muscle function was the result of M2-shifted macrophage polarization. Moreover, the M2-inducing effects of LIPUS were proved partially through the WNT pathway by upregulating FZD5 expression and enhancing β-catenin nuclear translocation in macrophages both and . The inhibition and augment of WNT pathway further verified our results. LIPUS at intensity of 60mW/cm could significantly promoted skeletal muscle regeneration through shifting macrophage phenotype from M1 to M2. The ability of LIPUS to direct macrophage polarization may be a beneficial target in the clinical treatment of many injuries and inflammatory diseases.

Topics: Mice; Animals; Wound Healing; Muscle, Skeletal; Ultrasonic Waves; Wnt Signaling Pathway; Inflammation; Contusions

PubMed: 36923940
DOI: 10.7150/ijbs.79685

Meta-Analysis Review

Authors: Ioannis Panagiotis Kyriazidis, Dominik A Jakob, Juliana Alexandra Hernández Vargas...

INTRODUCTION

The diagnosis of cardiac contusion, caused by blunt chest trauma, remains a challenge due to the non-specific symptoms it causes and the lack of ideal tests to diagnose myocardial damage. A cardiac contusion can be life-threatening if not diagnosed and treated promptly. Several diagnostic tests have been used to evaluate the risk of cardiac complications, but the challenge of identifying patients with contusions nevertheless remains.

AIM OF THE STUDY

To evaluate the accuracy of diagnostic tests for detecting blunt cardiac injury (BCI) and its complications, in patients with severe chest injuries, who are assessed in an emergency department or by any front-line emergency physician.

METHODS

A targeted search strategy was performed using Ovid MEDLINE and Embase databases from 1993 up to October 2022. Data on at least one of the following diagnostic tests: electrocardiogram (ECG), serum creatinine phosphokinase-MB level (CPK-MB), echocardiography (Echo), Cardiac troponin I (cTnI) or Cardiac troponin T (cTnT). Diagnostic tests for cardiac contusion were evaluated for their accuracy in meta-analysis. Heterogeneity was assessed using the I and the QUADAS-2 tool was used to assess bias of the studies.

RESULTS

This systematic review yielded 51 studies (n = 5,359). The weighted mean incidence of myocardial injuries after sustaining a blunt force trauma stood at 18.3% of cases. Overall weighted mean mortality among patients with blunt cardiac injury was 7.6% (1.4-36.4%). Initial ECG, cTnI, cTnT and transthoracic echocardiography TTE all showed high specificity (> 80%), but lower sensitivity (< 70%). TEE had a specificity of 72.1% (range 35.8-98.2%) and sensitivity of 86.7% (range 40-99.2%) in diagnosing cardiac contusion. CK-MB had the lowest diagnostic odds ratio of 3.598 (95% CI: 1.832-7.068). Normal ECG accompanied by normal cTnI showed a high sensitivity of 85% in ruling out cardiac injuries.

CONCLUSION

Emergency physicians face great challenges in diagnosing cardiac injuries in patients following blunt trauma. In the majority of cases, joint use of ECG and cTnI was a pragmatic and cost-effective approach to rule out cardiac injuries. In addition, TEE may be highly accurate in identifying cardiac injuries in suspected cases.

Topics: Humans; Thoracic Injuries; Wounds, Nonpenetrating; Heart Injuries; Myocardial Contusions; Troponin I; Troponin T; Diagnostic Tests, Routine

PubMed: 37245048
DOI: 10.1186/s13017-023-00504-9

Authors: Lutz Heinemann

Topics: Contusions; Humans

PubMed: 34911371
DOI: 10.1177/19322968211065066

Observational Study

Authors: Mary Clyde Pierce, Kim Kaczor, Douglas J Lorenz...

IMPORTANCE

Bruising caused by physical abuse is the most common antecedent injury to be overlooked or misdiagnosed as nonabusive before an abuse-related fatality or near-fatality in a young child. Bruising occurs from both nonabuse and abuse, but differences identified by a clinical decision rule may allow improved and earlier recognition of the abused child.

OBJECTIVE

To refine and validate a previously derived bruising clinical decision rule (BCDR), the TEN-4 (bruising to torso, ear, or neck or any bruising on an infant <4.99 months of age), for identifying children at risk of having been physically abused.

DESIGN, SETTING, AND PARTICIPANTS

This prospective cross-sectional study was conducted from December 1, 2011, to March 31, 2016, at emergency departments of 5 urban children's hospitals. Children younger than 4 years with bruising were identified through deliberate examination. Statistical analysis was completed in June 2020.

EXPOSURES

Bruising characteristics in 34 discrete body regions, patterned bruising, cumulative bruise counts, and patient's age. The BCDR was refined and validated based on these variables using binary recursive partitioning analysis.

MAIN OUTCOMES AND MEASURES

Injury from abusive vs nonabusive trauma was determined by the consensus judgment of a multidisciplinary expert panel.

RESULTS

A total of 21 123 children were consecutively screened for bruising, and 2161 patients (mean [SD] age, 2.1 [1.1] years; 1296 [60%] male; 1785 [83%] White; 1484 [69%] non-Hispanic/Latino) were enrolled. The expert panel achieved consensus on 2123 patients (98%), classifying 410 (19%) as abuse and 1713 (79%) as nonabuse. A classification tree was fit to refine the rule and validated via bootstrap resampling. The resulting BCDR was 95.6% (95% CI, 93.0%-97.3%) sensitive and 87.1% (95% CI, 85.4%-88.6%) specific for distinguishing abuse from nonabusive trauma based on body region bruised (torso, ear, neck, frenulum, angle of jaw, cheeks [fleshy], eyelids, and subconjunctivae), bruising anywhere on an infant 4.99 months and younger, or patterned bruising (TEN-4-FACESp).

CONCLUSIONS AND RELEVANCE

In this study, an affirmative finding for any of the 3 BCDR TEN-4-FACESp components in children younger than 4 years indicated a potential risk for abuse; these results warrant further evaluation. Clinical application of this tool has the potential to improve recognition of abuse in young children with bruising.

Topics: Child Abuse; Child, Preschool; Clinical Decision Rules; Contusions; Cross-Sectional Studies; Female; Humans; Infant; Infant, Newborn; Male; Prospective Studies; Sensitivity and Specificity

PubMed: 33852003
DOI: 10.1001/jamanetworkopen.2021.5832

Authors: Z Mehmood, S Mahmood, V Oktseloglou...

Topics: Contusions; Humans

PubMed: 35031719
DOI: 10.1038/s41415-022-3842-5

Review

Authors: Michael J Stuart

OBJECTIVE

To review the available football epidemiology literature to identify risk factors, facilitate injury prevention and uncover deficiencies that may be addressed by future research.

DATA SOURCES

A literature search of Sports Discus (1940-2003), Eric (1967-2003), EMBASE (1988-2003), MEDLINE (1966-2003), CINAHL (1984-2003), and Web of Science (1993-2003) identified the published articles on American football in athletes of high school age and younger.

MAIN RESULTS

Injury rate increases with the level of play (grade in school), player age, and player experience. The lower extremity (knee and ankle joints) is most frequently injured. Football injuries are much more common in games than in practice, and occur to players who are being tackled, tackling or blocking. Most injuries are mild, including contusion, strain and sprain. Rule changes with the prohibition of initial contact with the helmet or face-mask reduced catastrophic head and neck injuries.

CONCLUSION

Although no sport or recreational activity is completely risk-free, football epidemiology research is critical to injury prevention. The existing medical literature provides some valuable insights, but an increased emphasis on prospective research is required to test the efficacy of preventative measures. Quality research may contribute to a reduction in football injury risk by defining the role of player conditioning and strength training, coaching of safety fundamentals, avoidance of dangerous activities, as well as proper medical supervision and care. Sports medicine personnel, coaches, and officials must strive to minimize injuries through progressive education, improved coaching techniques, effective officiating, and equipment modifications.

Topics: Adolescent; Age Factors; Athletic Injuries; Child; Contusions; Football; Humans; Lower Extremity; Risk Factors; Sports Equipment; Sprains and Strains

PubMed: 16247262
DOI: 10.1159/000085392