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Biomedical subjects

U Mommsen

Publications and source records attributed to U Mommsen.

At least 19 recordsLinked to original sources
PubMed2000

[Injury profile in modern competitive karate--analysis of 1999 WKC-Karate World Championship Games in Bochum].

Competitions in Karate are either carried out as Shobu sanbon (with fist padding) or Shobu Ippon (without fist padding). Aim of this study was to gain current data on injuries in modern competitive Karate and to compare the two different competitive systems. During the WKC-Karate-World-Championships held from June 12-13 1999 at Bochum, 392 bouts were carried out. Every injury that was seen by the tournament doctor was registered. 142 competitors sustained 168 injuries: 141 mostly minor contusions of the head and throat, 12 facial lacerations, 3 knock-outs (mild brain injury), 3 thoracal contusions, 1 midfoot fracture and 9 other blunt injuries. We saw more injuries in Shobu Sanbon (146/302 bouts) than in Shobu Ippon (23/90). Most of the injuries (152) were caused by punches. In Shobu Sanbon, kicking techniques led to 17 injuries only. The injury pattern shown here is comparable to earlier studies. Severe injuries in competitive Karate are rare. The higher number of injuries in Shobu sanbon may be due to the longer fighting time and higher scoring. Fist pads used in Shobu Sanbon might also lead to a loss of control. Therefore, prophylactic fist padding to avoid injuries in competitive Karate has to be seen critically.

Adolescent↗
PubMed1995

Thoracic fracture-dislocations without spinal cord injury: a case report and literature review.

Severe fracture-dislocation of the thoracic spine without neurological deficit is rare. Both translational and rotational deformity of the midthoracic spine makes transection of the cord almost inevitable due to the confined dimensions of the cord and spinal canal. Even though associated fractures of posterior elements are frequently seen, they seldom result in neural sparing. The case of a 24-year-old man who sustained a severe rotational fracture-dislocation of T9/T10 with considerable anterolateral displacement is reported. Due to a fractured left pedicle and a right-sided vertical fracture through the posterior aspect of the vertebral body, alignment of the posterior elements in the spinal canal was maintained and there was no neurological deficit. The patient was operatively treated with posterior segmental instrumentation, and was completely asymptomatic at follow-up 5 years later.

Adult↗
PubMed1995

[Surgical treatment of thoracolumbar spinal fractures with internal fixator and transpedicular spongiosa-plasty].

We report on 30 unstable fractures of the thoracolumbar spine which were operatively treated between 1987 and 1992 with the AO Internal Fixator and transpedicular bone grafting. There were 26 flexion-compression fractures, 2 flexion-distraction injuries and 2 fracture-dislocations. Follow-up ranged from 2 to 5 years. All patients were examined and their histories reviewed. New radiographs were obtained and a standardized questionnaire on pain and on functional and economical status was answered. The radiographical analysis included measurement of the vertebral, segmental and local kyphosis and of the sagittal index. The preoperative vertebral kyphosis averaged +17 degrees and was corrected to +7 degrees at follow-up with the sagittal index improving from 0.59 to 0.86. The segmental respectively local kyphosis was reduced from +15 degrees respectively +8 to +5 degrees respectively -3 degrees. The fractured vertebra remained stable. We registered an average postoperative loss of correction of 4 degrees in the upper disc space due to collapse of the injured disc. The lower disc space was frequently overcorrected which was neutralized postoperatively due to a process of reequilibration of less than 3 degrees. The loss of correction occurred both before and after removal of the implant. There was no significant change of the sagittal plane apart from a successful realignment of the flexion-distraction injuries. Five out of 8 patients with neurological symptoms improved by at least 1 Frankel grade. We had no case of neurological deterioration. The results of the questionnaire were good or very good in 70%. At follow-up, the average back pain score was 3 out of 10, 10 being unbearable pain.

Adolescent↗
PubMed1994

[Fractures of the proximal tibia and knee ligament injuries].

The risk of secondary osteoarthritis after proximal tibial fractures is influenced by the reconstruction of both the articular surface and associated knee ligament injuries. In a follow-up of 69 operatively treated tibial head fractures 36.2% revealed ligamentous damages. At high risk were young male patients with fractures of the medial or both tibial condyles. Only 33% of the ligament damages were the cause of fracture dislocations as described by Moore. Avulsion fractures of the knee ligaments can be successfully treated on by primary fixation. For ruptures of the medial collateral ligament a functional therapy is often sufficient whereas damages of the cruciate ligaments need secondary reconstruction.

Adolescent↗
PubMed1992

[Damage to the knee ligament as a concomitant injury in femoral shaft fractures].

Knee ligament injuries associated with femoral shaft fractures can severely influence the functional results of treatment. In a follow-up of 59 operatively treated femoral shaft fractures 18.6% of the patients revealed ligamentous damages. In all cases one or both of the cruciate ligaments were injured. Especially polytraumatized car front-seat passengers are at higher risk with 30.8% ligament ruptures. While only 61.6% of the ligament injuries were primarily diagnosed, the testing of knee joint stability after osteosynthesis of a femoral fracture is essential. Furthermore arthroscopy should be performed if there is any hint of ligamentous damage. The ruptures of the anterior cruciate ligament and the ligamentous avulsion fractures can be successfully treated on by operative means.

Adolescent↗
PubMed1992

[Extra-articular fractures near the knee and concomitant knee damage].

While the prognosis of intra-articular fractures of the knee joint is determined by the reconstruction of the articular surfaces, ligamentous damage and resulting joint instability is a main problem with extra-articular fractures neighbouring the knee. In a follow-up of 43 cases of A 1-3 fractures according to the AO/ASIF classification, 37.2% of the patients revealed concomitant ligamentous damage. Especially supracondylar femoral fractures and the avulsion fractures of the posterior cruciate and lateral collateral ligament are at higher risk.--Ligamentous ruptures accompanying avulsion fractures should be treated primarily according to the rules of knee joint surgery. In cases of supracondylar femoral fractures after open reduction and internal fixation the recovery of knee joint motion is more important than joint stability. Therefore ligamentous repair has to be performed secondarily if necessary.

Adolescent↗
PubMed1986

[Alloplastic replacement of the anterior cruciate ligament by a polytetrafluoroethylene ligament. Animal experiment study].

4 sheep knees received an implant of polytetrafluorethylene. 18 month after implantation the clinical and histological investigation showed two cases of anterior instability and rupture of parts of the prosthesis. We sw severe degenerative lesions intraarticular with chronic inflammation characterized by the proliferation of immature fibroblasts, the accumulation of macrophages and the formation of multinucleated giant cells. The transfer of our results to the human knee is discussed.

Animals↗
PubMed1985

[Fractures of the lumbar spine and the lower thoracic spine--surgical technic and results].

Improved healing results are achieved by surgical treatment of fractures of the lumbar spine and of the thoracic transition, if the indication is correct, i.e. in case of splintered fracture with severe instability or neurologic troubles, but also in case of luxations occurring rarely in the region of the lumbar spine. The anterior fusion of fractions with bone defects in the region of the vertebral body is more logical with regard to the biomechanical aspect.

Adolescent↗
PubMed1985

[Supracondylar humerus fracture in childhood, its treatment and results following Blount's method].

From 1970 to 1980 155 supracondylar fractures of the humerus in children were treated conservatively by the method of Blount and 33 were treated surgically. The indications for operation were flexion-fractures, second- or third-grade compound fractures, vessel or nerve lesions and for easier nursing of polytraumatized patients. Out of 82 fractures treated by collar and cuff 64 (78%) show an ideal, 12 (15%) a good and 6 (7%) a satisfactory result two to ten years after the accident. In 18 cases one could see a defective varus function of more than five degrees.

Child↗
PubMed1984

[Principles of fracture treatment in childhood].

In childhood the healing of fractures proceeds rapidly and reliably due to to the high repair capacity of the growing skeleton. Even remaining defective axis positions are more or less compensated. An approach to explain this mechanism is presented, based on our experimental investigations. Sometimes, however, considerable growth disturbances and severe malformations can be caused by an injury. Therefore a successful treatment must be guided by the knowledge of the reactions to injuries of the growing skeleton.

Bone Development↗
PubMed1984

[Value of homologous spongiosa in filling up subchondral bone defects].

The biologic value of cryo-preserved homologous spongiosa for filling up subchondral bone defects shall be investigated. The experimentations are made on rabbits. Three groups are built in order to evaluate the results: Group I: No filling up of defects. Group II: Lining with fresh autologous spongiosa. Group III: Lining with cryo-preserved homologous spongiosa. The lining is performed after standardized subchondral setting of defects in the zone of maximal load of the medial femur condyle. As well in non-filled up defects as after lining with homologous spongiosa, macroscopic and microscopic examinations show between the fourth and eighth postoperative week a hernia of the cartilage-bone lamella. The autologous spongiosa, however, guarantees the stability and vitality of the joint cartilage, as is shown by the results found twelve weeks after the operation. The results may be explained by the retarded osteogenetic power and the long period of catabolism of the homologous spongiosa.

Animals↗
PubMed1984

[Soft tissue injuries of the shoulder joint].

In contrast to rare occurrence of blood vessel and nerve injuries the frequency of tendinous lesions of the shoulder is high. The clinical diagnosis of the ruptured tendon of the M. biceps brachii is obvious. On the other hand only arthrography or arthroscopy can verify the diagnosis of a ruptured supraspinatus tendon. The best access for tenosuture and tenoplasty of the latter is the transacromeal method.

Axillary Artery↗
PubMed1984

[Late results in the treatment of subtalar dislocations].

A follow-up study concerning arthrotic, ischemic and functional results was performed in 20 patients with subtalar luxations over an average of 13 years after the initial trauma. 13 patients showed good, 7 poor results according to Weber. 4 of these 7 patients were free of any complaints but showed reasonable arthrosis in both ankle joints as well as pathological scintigrams. Three cases operated upon showed poor functional results, two of them were primarily open, in one case the tendon of m. tibialis post. forced us to reduct openly. The best results could be obtained by immediate reduction and conservative treatment.

Adult↗
PubMed1982

[Results of conservatively treated upper arm fractures in adults (author's transl)].

Between 1975 and 1979 93 upper arm fractures were treated: 79 by hanging cast, 14 by surgery. The indications for operation were second or third degree compound fractures, vessel or nerve lesions, serial fractures in both arms and for easier nursing of the aged and polytraumatised. Out of 79 conservatively treated patients 12 required secondary surgery after 8 weeks due to prolonged fracture healing. 62 (93%) out of 67 fractures treated solely by hanging cast showed very good and good results 1-5 years after the accident--transverse fractures included--and only 5 (7%) poor results.

Age Factors↗
PubMed1982

[Collagen fiber texture and injury pattern of the epiphyseal groove].

Injuries of the epiphyseal plate seem to follow the course of the collagenous fibres in the epiphyseal plate. Studies using polarized light and scanning electron microscopy show the relationship between the collagenous fibres and the direction of fractures of the epiphyseal plates.

Child↗
PubMed1982

[Therapy and prognosis of severe soft tissue injuries in children].

In consequence of "run-over" road accidents of children there has been a marked increase in severe soft tissue injuries. --The prophylaxis of bacterial contamination, the immediate reduction of compound fractures as well as the consequent debridement of devitalized soft tissue are shown to be essential components of the acute traumatic wound care. Primary closure of the wound must not be forced. The definite procedure includes reconstruction of vessels, nerves and last but not least osteosynthesis of fractures. Special attention is given to the fixateur externe, which is getting increasingly important in childhood injuries. The follow-up results of 17 multiple injured children with 3rd-degree open fractures and/or severe soft tissue injuries demonstrate that in childhood the results are generally better than in grown-up patients with corresponding injuries. 80% of the children showed very good results. No osteomyelitis was observed.

Accidents, Traffic↗