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Biomedical subjects

W T Simonet

Publications and source records attributed to W T Simonet.

13 recordsLinked to original sources
PubMed1995

Abdominal wall muscle tears in hockey players.

Groin pain in athletes may be due to muscle strains, referral of pain from internal organs, and/or hernia. This study includes ten elite level hockey players unable to continue their careers due to groin pain. These patients did not present with the typical causes described above, including hernia. They were explored surgically and were found to have tears in the floor of the inguinal ring which were repaired either directly or with a synthetic mesh reinforcement (seven cases). All the patients have subsequently returned to hockey. Because these patients presented with symptoms similar to hernia, but did not have a hernia at the time of surgical exploration, they were considered to have a condition previously described as "sportsman's hernia".

Abdominal Muscles↗
PubMed1995

Boot-top tendon lacerations in ice hockey.

Injury to the anterior tibial tendon, extensor hallucis longus, extensor communis tendons, or dorsalis pedis artery, vein, and nerve are known as "boot-top" injuries. A series of five such cases illustrates that the size of laceration is often small and injury to the underlying structures can be missed. This injury should be preventable if equipment is worn properly.

Adult↗
PubMed1990

Ice hockey injuries. A review.

Ice hockey is a fast-paced game involving both finesse and controlled aggression. Injuries are related to direct trauma (80%) and overuse (20%), with high puck velocities, aggressive stick use, and body checking (collisions) accounting for most of these. A participant can anticipate an injury after playing 7 to 100 hours of hockey, depending on his age, and most injuries are caused during the actual game rather than during practice. Although facial injuries are common, they are decreasing because of adequate use of helmets and masks. Conversely, cervical spine injuries are being reported more frequently. Injuries to the upper extremity include acromioclavicular joint dislocations, scaphoid fractures, and 'gamekeeper's thumb.' Injuries to the lower extremity predominantly involve soft tissue, with strains of the hip adductor, tears of the medial collateral ligament of the knee, and contusions of the thigh are common. Scientific studies have reduced injury by providing improved protective equipment, stricter rules and their enforcement, and effective training and conditioning.

Arm Injuries↗
PubMed1988

Cortical and cancellous bone: age-related changes in morphologic features, fluid spaces, and calcium homeostasis in dogs.

The changes in cortical and cancellous bone that occur with aging were studied by measuring morphologic and physiologic variables for both types of bone in dogs. The percentage area of cortical and cancellous bone, rate of bone formation, vascular volume, bone water, and volume of distribution of calcium tracer all showed statistically significant changes at the time of bone maturity. Canine cortical bone cell volume progressively decreased with advancing age, and cancellous bone cell volume significantly decreased between adult and old dogs. The volume of distribution technique can be used to determine the relative contributions of cortical and cancellous bone to the total body exchangeable calcium ion pool.

Aging↗
PubMed1988

Ice hockey injuries.

Ice hockey is a team sport that has recently grown in popularity not only in the United States but also in Canada and Europe. With this increase in popularity has come a growing concern about the number and severity of injuries. The world literature on the biomechanics and physiology of ice hockey was reviewed in an attempt to evaluate the forces and mechanisms involved in the game. The influence of rule and equipment changes on injury patterns was particularly studied. Several studies on the epidemiology of injuries, providing data on the types of injuries and the mechanisms of those injuries, were analyzed to determine the conclusions that could be supported and those that require further study. Possible changes in the patterns and types of injury are outlined.

Adolescent↗
PubMed1984

Quantification of regional blood flow to canine flexor tendons.

Although the blood supply and the microcirculation of flexor tendons have been studied and defined extensively using qualitative methods, the quantitative assessment of blood flow has been lacking because of the limitations of the available experimental techniques. We studied the regional blood supply to the flexor tendons of dogs by the technique of radionuclide-labeled microspheres. Seven adult mongrel dogs were used. Microsphere injection and tissue-counting techniques previously used for other tissues were applied. Samples of proximal, isthmus, and distal portions of the profundus and superficialis flexor tendons were harvested from each digital unit of available limbs from each dog. Mean (+/- SE) flows (ml/100 g dry tissue/min) were proximal profundus 1.78 +/- 0.60 and superficialis 7.10 +/- 1.50. The differences were significant (p less than 0.01). The study suggests that regional variation in blood flow to canine digital flexor tendons exists, so that a single value for blood flow to these tendons is not relevant. Furthermore, the study supports the concept of dual (vascular and synovial) nutrition to the digital flexor tendons in dogs. These observations may have implications regarding tendon repair techniques.

Animals↗
PubMed1984

The shoulder in sports.

Many sports activities that involve the upper extremity entail similar patterns of movement. Analysis of these activities, a better understanding of the throwing motion, and an awareness of shoulder diseases or injuries have led to a rational plan for investigation and management of shoulder problems. Evaluation often extends beyond the usual medical boundaries and must be based on information obtained from an analysis of sports mechanics, a review of training methods, and a physical examination directed at determination of flexibility, strength, endurance, and the presence of inflammation. Three common sports injuries are damage to the acromioclavicular joint (shoulder separation), instability of the glenohumeral joint, and a spectrum of pathologic changes in the rotator cuff. Sports that are commonly associated with shoulder problems include swimming, baseball, tennis, football, and gymnastics. Treatment may comprise rest, changes in training methods, an alteration of technique, and a physical rehabilitation program. Surgical treatment has a well-defined role, but it is usually optional.

Acromioclavicular Joint↗
PubMed1984

Incidence of anterior shoulder dislocation in Olmsted County, Minnesota.

The records of all Olmsted County, Minnesota residents treated for an initial traumatic anterior shoulder dislocation during a ten-year period were reviewed to study the incidence and natural history of this condition. One hundred twenty-four patients had been treated during the study period, and in 116 patients (93.5%) complete follow-up evaluation was available. The overall adjusted incidence of initial traumatic shoulder dislocations was 8.2/100,000 person-years; of all traumatic shoulder dislocations, the rate was at least 11.2/100,000 person-years. Incidence rates were significantly greater for men than for women. There was no urban versus rural difference in incidence or recurrence rates. The authors concluded that shoulder dislocation occurs most frequently in younger male patients and occurs with similar frequency in urban and rural settings. Except for age-related differences in recurrence rates no significant referral bias was found among patients treated at a tertiary care facility as compared with patients from the local community.

Adolescent↗
PubMedDate not supplied

Prognosis in anterior shoulder dislocation.

All patients treated for a first-time anterior glenohumeral dislocation in Olmsted County, Minnesota, from 1970 through 1979 were identified. Of these 124 patients, 116 were available for study at a mean followup of 4.63 years (range 2 to 11). Of the 116 patients, 38 (33%) had recurrence of dislocation: 21 of the 32 (66%) patients less than 20 years old, 17 of the 43 (40%) patients 20 through 40 years old, and none of the 41 patients older than 40 years. Symptomatic instability remained a problem in 24 patients. Twenty-seven of 33 (82%) young athletes had recurrence of dislocation as compared with only 8 of 27 (30%) nonathletes of similar ages. Patients restricted from resuming sports participation for 6 weeks or more had significantly better results than those restricted for less than 6 weeks. The recurrence rate of dislocation is not as high as previously reported. However, the rate in athletes is much higher than that in nonathletes. Many patients continue to complain of symptomatic instability without actual redislocation. In our younger patients, we now advise immobilization for from 3 to 6 weeks, followed by extensive rehabilitation before return to athletic activity.

Adolescent↗
PubMedDate not supplied

Repair and reconstruction of rotatory instability of the knee.

We studied the results of treatment in 110 of 129 consecutive patients who had knee instability for which they underwent reconstruction of the knee ligaments at the Mayo Clinic. Thirty-one patients underwent different types of extraarticular reconstruction. Nine (29%) had recurrence of the knee giving way, and 11 (36%) had objective signs of instability on examination. Fifty-five patients underwent combined extraarticular and intraarticular reconstruction with either the Lam-Jones patellar tendon (PT) procedure (21 knees) or the Zarins-Rowe semitendinosus and iliotibial band (ST & ITB) procedure (34 knees). Only two knees (10%) with PT procedure and three knees (9%) with ST & ITB procedures continued to have giving way. Three patients in each group had recurrence of instability. Twenty-four knees with acute instability had either primary repair (17 knees) or primary reconstruction with ST & ITB procedures (7 knees). The results in these knees were superior to the results in the knees reconstructed for chronic instability. On the basis of our 2 year results, we believe that a combined intraarticular and extraarticular reconstruction is the procedure of choice in chronic knee instability and is a useful procedure in acute knee instability with irreparable tears of the anterior cruciate ligament.

Adolescent↗
PubMedDate not supplied

Ice hockey injuries.

Ice hockey is a team sport that has recently grown in popularity not only in the United States but also in Canada and Europe. With this increase in popularity has come a growing concern about the number and severity of injuries. The world literature on the biomechanics and physiology of ice hockey was reviewed in an attempt to evaluate the forces and mechanisms involved in the game. The influence of rule and equipment changes on injury patterns was particularly studied. Several studies on the epidemiology of injuries, providing data on the types of injuries and the mechanisms of those injuries, were analyzed to determine the conclusions that could be supported and those that require further study. Possible changes in the patterns and types of injury are outlined.

Athletic Injuries↗