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Biomedical subjects

N G Mohtadi

Publications and source records attributed to N G Mohtadi.

At least 19 recordsLinked to original sources
PubMed2006

A multi-centre randomized controlled trial comparing electrothermal arthroscopic capsulorrhaphy versus open inferior capsular shift for patients with shoulder instability: protocol implementation and interim performance: lessons learned from conducting a multi-centre RCT [ISRCTN68224911; NCT00251160].

BACKGROUND: The shoulder is the most frequently dislocated joint in the body. Multiple causes and pathologies account for the various types of shoulder instability. Multi-directional instability (MDI) and multi-directional laxity with antero-inferior instability (MDL-AII) are similar in pathology, less common and more difficult to treat. These instabilities are caused by ligamentous capsular redundancy. When non-operative management fails for these patients, quality of life is significantly impaired and surgical treatment is required to tighten the ligaments and joint capsule. The current reference (gold) standard treatment for MDI/MDL-AII is an open inferior capsular shift (ICS) surgical procedure. An alternative treatment involves arthroscopic thermal shrinkage of redundant capsular tissue to tighten the joint. However, there is a lack of scientific evidence to support the use of this technique called, electrothermal arthroscopic capsulorrhaphy (ETAC). This trial will compare the effectiveness of ETAC to open ICS in patients with MDI and MDL-AII, using patient-based quality of life outcome assessments. METHODS: This study is a multi-centre randomized clinical trial with a calculated sample size of 58 patients (p = 0.05, 80% power). Eligible patients are clinically diagnosed with MDI or MDL-AII and have failed standardized non-operative management. A diagnostic shoulder arthroscopy is performed to confirm eligibility, followed by intra-operative randomization to the ETAC or ICS surgical procedure. The primary outcome is the disease-specific quality of life questionnaire (Western Ontario Shoulder Instability Index), measured at baseline, 3, 6, 12 and 24 months. Secondary outcomes include shoulder-specific measures (American Shoulder and Elbow Surgeons Score and Constant Score). Other outcomes include recurrent instability, complications and operative time. The outcome measurements will be compared on an intention-to-treat basis, using two-sample independent t-tests to assess statistical significance. A Generalized Estimated Equations (GEE) analysis will determine whether there is an effect over time. DISCUSSION: This ongoing trial has encountered unexpected operational and practical issues, including slow patient enrollment due to high intra-operative exclusion rates. However, the authors have a greater understanding of multi-directional laxity in the shoulder and anticipate the results of this trial will provide the medical community with the best scientific clinical evidence on the efficacy of ETAC compared to open ICS.

Journal Article↗
PubMed2001

Evidence-Based review of sport-related concussion: clinical science.

The clinical nature of sport-related concussion is discussed in this paper. Particularly highlighted are the difficulties with definition, injury severity grading, classification, and understanding of clinical symptoms. In addition, the well-recognized sequelae of concussion including the motor and convulsive manifestations are discussed in detail. Where possible, an evidence-based approach is adopted to assist the understanding of the literature in this complex area.

Athletic Injuries↗
PubMed2001

Evidence-based review of sport-related concussion: basic science.

The evidence base for sport-related concussive brain injury is reviewed in this paper. In the past, pathophysiological understanding of this common condition has been extrapolated from studies of severe brain trauma. More recent scientific study demonstrates that this approach is unsatisfactory, and the clinical features of concussion represent a predominantly functional brain injury rather than manifest by structural or neuropathological damage. Such understanding of this condition remains incomplete at this stage.

Athletic Injuries↗
PubMed2000

Evaluation of outcomes in patients following surgical treatment of chronic exertional compartment syndrome in the leg.

OBJECTIVE: To evaluate outcomes in patients who had a fasciotomy performed on their leg(s) for chronic exertional compartment syndrome (CECS). DESIGN: A retrospective descriptive cohort study. SETTING: Tertiary care sport medicine referral practice. PATIENTS: A consecutive series of 62 patients surgically treated for CECS from January 1991 to December 1997. MAIN OUTCOME MEASURES: A questionnaire was designed and developed to assess pain (using a 100 mm visual analogue scale), level of improvement, level of maximum activity, satisfaction level, and the occurrence of reoperations. RESULTS: Fifty patients had anterior/lateral compartment involvement, 8 patients had deep posterior compartment involvement, and 4 patients had anterior/lateral/deep posterior compartment involvement. The demographics of the 39 respondents and 23 nonrespondents were similar. The mean percent pain relief of respondents was 68% (95% CI [confidence interval] = 54% to 82%). There was no relationship between percent pain relief and the documented immediate post exercise compartment pressures. A clinically significant improvement was reported by 26 of 32 (81%) anterior/lateral compartment patients and 3 of 6 (50%) patients with deep posterior compartment involvement. Patient level of activity after fasciotomy was classified as equal to or higher than before the operation with a lesser degree of pain by 28 of 36 (78%) patients, while 8 of 36 (22%) patients reported lower activity levels than before the operation. Of the patients reporting lower activity, seven were due to exercise related pain in the post operative leg(s) and one was due to lifestyle changes. Thirty of 38 patients (79%) were satisfied with the outcome of the operation. Four of 62 patients (6%) failed the initial surgical procedure and required revision surgery for exercise-induced pain. In addition, one of these individuals also had a sympathectomy and another had a neurolysis performed at the time of revision surgery. Three of the 62 (5%) patients had subsequent operations for exercise-induced pain on different compartments than the initial surgical procedure. One individual had an unsuccessful operative repair of a posttraumatic neuroma. Postoperative complications were reported by 5 of 39 (13%) patients in the additional comments section of the questionnaire. CONCLUSIONS: The majority of patients surgically treated for CECS experience a high level of pain relief and are satisfied with the results of their operation. The level of pain relief experienced by patients is not related to the magnitude of the immediate post exercise compartment pressures. Despite the possibility that some patients have less favorable outcomes, experience complications, or need subsequent operations, fasciotomy is recommended for patients with CECS as there is no other treatment for this condition.

Adult↗
PubMed1999

Skiing and snowboarding injuries in the children and adolescents of Southern Alberta.

OBJECTIVE: To identify injuries and profile the characteristics of injured skiers and snowboarders younger than 18 years of age in Southern Alberta, Canada. DESIGN: Case-series over one year. PARTICIPANTS: Injured skiers and snowboarders younger than 18 years of age presenting to the ski patrol members at each of seven ski areas in Southern Alberta. MAIN OUTCOME MEASURES: Information on injured individuals reporting to the ski patrol at the involved areas was documented on a standardized injury reporting form. Anonymous information was then copied and sent to the University of Calgary Sport Medicine Centre, where the data were analyzed. Proportions of injured skiers and snowboarders with specific characteristics or participating in specific environmental conditions are presented. RESULTS: There were a total of 832 (60.0%) injury reports filed for skiers and 557 (40.1%) for snowboarders, reflecting 1,635 separate injuries. Head injuries were the most frequently reported (19.1% of all regional injuries). The most commonly injured region was the knee among skiers (n = 213; 22.8%) and the wrist among snowboarders (n = 173; 27.8%). Lower extremity injuries in skiers and upper extremity injuries in snowboarders were most common. Younger male skiers and snowboarders reported high proportions of head, neck, and back injuries. CONCLUSION: The lower extremity in skiers and the upper extremity in snowboarders were most susceptible to injury. A cause for concern is the high proportion of head injuries reported for both male skiers and snowboarders of younger age groups. Further study into protective equipment design and function is required.

Adolescent↗
PubMed1997

Survey of competitive distance runners in Alberta: satisfaction with health care services with respect to running injuries.

OBJECTIVE: To measure the level of satisfaction of competitive runners with health care services provided for injury management. Secondary objectives were to identify the injury frequency and the rate of utilization of health care services. DESIGN: Descriptive survey. PARTICIPANTS: Cohort of all competitive distance runners in Alberta. MAIN OUTCOME MEASURES: A questionnaire was designed based upon a literature review, standardized questionnaire methodology, and pretesting and evaluation. The questionnaire was mailed to all competitive runners in Alberta. A follow-up letter was mailed to maximize the return rate. The main focus of the questionnaire was to evaluate the athletes' level of satisfaction with health care services, as well as reasons for dissatisfaction with health care. RESULTS: The survey was sent to 306 athletes. A 79% response rate was achieved. There were a number of clinically important trends in the data: (a) 75% of athletes experienced one or more injuries in a 2-year period, (b) 93% of injured athletes utilized health care services for their injuries, and (c) 62% of athletes were satisfied with this health care. The level of satisfaction with health care (62%) was found to be lower than typical levels of satisfaction with health care in the literature. Several reasons for dissatisfaction with health care were identified. CONCLUSIONS: High rates of injury and health care utilization, and a low level of satisfaction with health care were found amongst competitive distance runners. A prospective study is required to confirm these findings.

Adolescent↗
PubMed1996

Functional outcome measures after displaced intra-articular calcaneal fractures.

We have devised a new scoring system using visual analogue scales (VAS) to determine the functional outcome in 15 patients with 20 displaced intra-articular calcaneal fractures, confirmed by CT. The average follow-up was 19 months. A VAS was completed separately by the patient, the surgeon and an independent assessor. It showed satisfactory agreement between observers and strong correlations with a General Health Survey (SF36), a pain scale (McGill Pain Questionnaire) and a disease-specific, historical scale for calcaneal fractures (the Rowe score).

Activities of Daily Living↗
PubMed1995

Using an objective structured clinical examination to evaluate competency in sport medicine.

This article discusses the development, format, administration and scoring of the objective structured clinical examination (OSCE) to evaluate competency in sport medicine. The credentials committee of the Canadian Academy of Sport Medicine has developed an examination to evaluate the competency of practicing physicians in the field of sport medicine. The examination is based on a sport medicine matrix that includes five areas: (a) clinical patient care, (b) team and event coverage, (c) medical/legal issues, (d) teaching and administration, and (e) research. The emphasis is on clinical patient care followed by team and event coverage, with the other three areas having a lesser degree of importance. The OSCE format consists of a number of stations or scenarios based on this matrix. The candidates are evaluated on a check list that reflects the emphasis of each station. A typical clinical patient care problem includes check list items related to the history, physical examination, investigations, diagnosis, and treatment. The candidates are also evaluated for their attitudes and techniques on each station. The examination includes volunteer examiners and patients both simulated and real. The candidates are evaluated through the use of checklists that are filled in by the examiners on optical scoring sheets. These are collated and analyzed to generate comparisons between candidates and to determine the psychometric properties of the overall examination. The examination has consistently scored reliability coefficients of 0.8 or greater. The 1993 examination demonstrated reliability coefficients of 0.89-0.97. Interrater reliability was also calculated, and these values ranged from 0.85 to 0.99. The examination also reflects both face and content validity.(ABSTRACT TRUNCATED AT 250 WORDS)

Canada↗
PubMed1992

Injuries to the nervous system and spine in downhill skiing.

The authors describe injuries to the nervous system and spine from downhill skiing accidents through a review of the charts of downhill skiers admitted over 5 years to the three teaching hospitals of the University of Calgary. The office of the chief medical examiner provided details about accidental deaths from downhill skiing in which nervous system trauma occurred. During the study period, 145 downhill skiers suffered injury to the nervous system or spine. There were five deaths from nervous system trauma. The mean age of the injured skiers was 23.8 years, and these injuries were three times more common in men than in women. Eighty-eight skiers sustained a head injury, 25 had spinal fractures alone, 20 had spinal cord or nerve root injury and 12 had peripheral nerve injury. A simple fall on the hill was the commonest method of injury, followed in frequency by collision with a tree, which caused the most severe injuries. Reckless skiing, design of ski runs and man-made snow were contributing factors. The serious nature and number of these injuries must be recognized, and further study is needed on causal factors and preventive measures.

Adolescent↗
PubMed1991

Advances in the understanding of anterior instability of the shoulder.

Anterior instability involves a spectrum of disease ranging from the obvious acute first-time dislocation to the athlete presenting with shoulder pain and no history suggestive of instability. It is important to recognize the pathophysiology and how it relates to this spectrum of disease. The arthroscope has helped to identify the underlying pathology in both acute and chronic situations. Diagnostically, a history of a painful shoulder, especially in the athlete, should suggest anterior instability. Tests of translation, apprehension, and the use of local anesthetic can be useful. Arthroscopy is used in situations in which the diagnosis is unclear. The management of anterior instability should emphasize strengthening of the rotator cuff and scapular stabilizers. Surgical repair requires correction of the underlying pathology with minimization of damage to other structures. Arthroscopic management of anterior instability includes repair, debridement of intra-articular lesions, and the possibility of acute correction of the pathoanatomic lesions.

Humans↗
PubMed1991

Controversy in anterior shoulder instability.

The main areas of controversy in anterior shoulder instability are acute dislocation, recurrent instability, pain and instability in the "throwing athlete", and the role of arthroscopy. Treatment of the acute dislocation involves rest initially, followed by aggressive rehabilitation with protection of the shoulder until strength and motion have returned and pain and apprehension have resolved. Patients with recurrent instability may be seen with a variety of clinical scenarios. The surgical indications, pathology, and two methods of soft-tissue reconstruction are described along with an approach to postoperative rehabilitation. Return to sporting activity may be feasible by three months. The current thinking on the painful shoulder in the "throwing athlete" is outlined. Management must be based on an accurate diagnosis. Strengthening of the rotator cuff and scapular stabilizers is recommended with surgery to correct the pathology in those who fail this program. Arthroscopy is a valid tool in the diagnosis of anterior shoulder instability. The clinical significance of some intraarticular findings has not yet been clarified. Therapeutic use should be undertaken only in experienced hands, appreciating that failure of arthroscopic repair is higher than comparable open surgical techniques. The open approach to anterior stabilization is preferred.

Arthroscopy↗
PubMed1990

Concentric and eccentric quadriceps torque in pre-adolescent males.

The purpose of this study was to evaluate the applicability of using the Kin Com (Chattecx Corp., Chattanooga, TN) isokinetic machine to measure concentric and eccentric quadriceps torque in a group of 12 healthy male volunteers aged 10-12 years. Each individual was tested by an experienced physiotherapist using a 60 degree per second velocity mode according to our standardized protocol. Average and peak torque values for concentric and eccentric contractions of the quadriceps were recorded; based upon the best of three maximum effort trials on each lower extremity. Retesting was performed on a randomly selected sub-group in an identical manner two weeks later. Our results showed no statistically significant difference between the original and retest values using the method error of repeated measurements and paired t-test analyses. Eccentric peak torque was greater on average than concentric. This was significant with p-values of 0.01 for the non-dominant quadriceps and 0.002 for the dominant side (paired t-test). There was no significant difference between the dominant and non-dominant sides. In conclusion, eccentric muscle testing has been reliably quantitated for the first time in children. This study has shown a practical and reproducible method of quantitative muscle strength assessment.

Child↗
PubMedDate not supplied

Head and neck injuries among ice hockey players wearing full face shields vs half face shields.

CONTEXT: Speculation exists that use of a full face shield by ice hockey players may increase their risk of concussions and neck injuries, offsetting the benefits of protection from dental, facial, and ocular injuries, but, to our knowledge, no data exist regarding this possibility. OBJECTIVE: To determine the risk of sustaining a head or neck injury among intercollegiate ice hockey players wearing full face shields compared with those wearing half shields. DESIGN, SETTING, AND PARTICIPANTS: Prospective cohort study conducted during the 1997-1998 Canadian Inter-University Athletics Union hockey season of 642 male hockey players (mean age, 22 years) from 22 teams. Athletes from 11 teams wore full face shields and athletes from 11 teams wore half face shields during play. MAIN OUTCOME MEASURE: Reportable injury, defined as any event requiring assessment or treatment by a team therapist or physician or any mild traumatic brain injury or brachial plexus stretch, categorized by time lost from subsequent participation and compared by type of face shield. RESULTS: Of 319 athletes who wore full face shields, 195 (61.6%) had at least 1 injury during the study season, whereas of 323 who wore half face shields, 204 (63.2 %) were injured. The risk of sustaining a facial laceration and dental injury was 2.31 (95% confidence interval [CI], 1.53-3.48; P<.001) and 9.90 (95% CI, 1.88-52.1; P = .007) times greater, respectively, for players wearing half vs full face shields. No statistically significant risk differences were found for neck injuries, concussion, or other injuries, although time lost from participation because of concussion was significantly greater in the half shield group (P<.001), than in the group wearing full shields. CONCLUSIONS: These data provide evidence that the use of full face shields is associated with significantly reduced risk of sustaining facial and dental injuries without an increase in the risk of neck injuries, concussions, or other injuries.

Adult↗
PubMedDate not supplied

"Locked" shoulder.

Explore the source record for details and available documents.

Adult↗
PubMedDate not supplied

Two 6-year follow-up studies of large and massive rotator cuff tears: comparison of outcome measures.

The purposes of this report are (1) to describe the development of a quality-of-life outcome measure for rotator cuff disease (RC-QOL) and a new simple test of rotator cuff function, the Functional Shoulder Elevation Test (FSET), and (2) to compare these with the SF-36 and the American Shoulder and Elbow Surgeons Assessment (ASESA) in a cohort of 86 patients with surgically treated large and massive rotator cuff tears. The RC-QOL is a 34-item self-administered questionnaire that has demonstrated excellent reliability, face validity, and ability to discriminate between large and massive cuff tears; it has also confirmed the construct of higher correlations with the other shoulder outcome measures than with the SF-36. The FSET is a simple test of rotator cuff function that uses 5% body weight and measurement of pain and discomfort on a 100-point visual analog scale. It was highly correlated with the RC-QOL and ASESA and discriminated between large and massive cuff tears. The study achieved an 82% follow-up at an average of 3.5 years. Large cuff tears had statistically significantly improved outcome scores in comparison with massive cuff tears on these 3 outcome measures. The SF-36, however, was not able to discriminate between tear sizes. The RC-QOL and the FSET are recommended outcome measures for rotator cuff disease.

Adult↗
PubMedDate not supplied

The distribution of injuries in men's Canada West university football. A 5-year analysis.

We conducted a prospective cohort study from 1993 to 1997 to determine the frequency and severity of injury in men's Canada West university football. The Canadian Intercollegiate Sport Injury Registry was used to document baseline preseason data, daily athlete participation, and subsequent injury from five varsity football teams. An injury was defined as "any injury resulting in one or more complete or partial sessions of time loss" or "any concussion or transient neck neurologic injury." The annual proportion of injured athletes ranged from 53.5% to 60.4%, with a 5-year total of 1,811 injuries. Regression analysis indicated that the rate of nonconcussion, nonneck neurologic injuries increased. Concussion (N = 110), hamstring strain (N = 88), and brachial plexus (N = 84) injuries were the most common, specific injury diagnoses. Knee injuries resulted in the highest rate of severe (greater than or equal to 7 sessions of time loss) injury and resulted in the most time loss (3,350.5 sessions). Ligament sprains and muscle strains and spasms accounted for approximately half of all injury diagnoses. A total of 1,173 injuries (65%) were related to contact between players or between players and other obstacles. Future studies should be conducted to identify risk factors for the ultimate purpose of implementing injury prevention strategies.

Adolescent↗