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Biomedical subjects

E Mayr

Publications and source records attributed to E Mayr.

At least 55 records · Page 3Linked to original sources

[Approach-related results following acetabular fractures].

Acetabular fractures are severe injuries. Making a diagnosis and deciding on therapy are difficult because of the complexity of the anatomic structure and because of the soft tissues. Choosing the most suitable approach is the most important problem when deciding on the operative treatment. Besides standard approaches (Kocher/Langenbeck, ilioinguinal and extended iliofemoral), the "Maryland approach" has been established in the last few years. Modifying the steps of preparation, it is possible to begin the operation with a Kocher/Langenbeck approach (with variation on where the skin incision is made) and to extend the approach step by step to achieve optimal exposure. Here we describe the results of acetabular fractures treated between 1989 and 1994 (n = 159) in our clinic related to the surgical approach. The "modified Maryland approach" as used in our clinic, starts with exposure of the dorsal column, offering the possibility of a universal exposure.

Acetabulum↗

Tumorous calcinosis: a disease of its own?

Tumorous calcinosis has been considered as a disease of its own. A survey of the literature shows that only its clinical and radiological appearances are universally agreed upon, while its epidemiology and etiology are still under discussion. A genetic disorder, recurrent soft-tissue microtrauma and terminal renal failure have been put forward as causes. All of them may lead to a localized or generalized disturbance of the calcium-phosphate metabolism, which in turn could produce tumorous calcinosis. Therefore, tumorous calcinosis should be regarded as a rare manifestation of a metabolic disorder rather than a disease of own.

Adult↗

[Pelvic fractures: epidemiology, therapy and long-term outcome. Overview of the multicenter study of the Pelvis Study Group].

Pelvic fractures are rare injuries (3-8%) when compared to fractures in other body regions. They are accompanied by high mortality (5-20%), and the survivors suffer from severe pain and pelvic-related handicaps. The German Pelvic Group (German Chapter of the AO-International & German Trauma Society) started a prospective multicenter study, including ten major trauma centers for collecting a high number of data in a short period of time (1991-1993). All pelvic injuries were documented consecutively using a special set of evaluation sheets. The study closed with 1,722 patients. A 2-year follow-up was completed for 486 patients injured in 1991 and 1992 after type B and C injuries, complex pelvic trauma, acetabulum fractures and a random 25% of A-type injuries (overall follow-up rate 73%). The follow-up included special "out-come" criteria. Of the pelvic ring injuries without significant peripelvic soft tissue involvement, 63.6% were A-type fractures, 21.0% B-type injuries and 15.5% C-type injuries. The rate of operative stabilization was 3.9% after A-type injuries, 37.3% after B-type injuries and 54.3% after C-type injuries. In isolated acetabular fractures ORIF was performed in 38.6%. The total lethality was 7.9% with a significant difference between "complex" pelvic trauma (21.3%) and patients without concomitant peripelvic injuries (7.2%). In 0.9% the pelvic injury was reported as the main cause of death. Pain at follow-up was observed in every classification group, the rate of completely "pain-free" patients being 55% after A-type, 41% after B-type and 27% after C-type fractures. Malfunction of micturia was reported by 7.6% of all patients, sexual malfunction by 11.6% of the males ("erectile dysfunction") and 2.2% of the female ("dysparneuria"). Scaled by the recently developed "outcome score", the radiological result showed anatomical healing after 90.8% of the B-type and 74.6% of the C-type injuries. On the other hand, the clinical result was rated as good or excellent in only 70% of the B-type and 54% of the C-type injuries. Although progress in indications and treatment techniques has shown improved radiological results after unstable pelvic ring injuries when compared to earlier studies, the clinical result still remains unsatisfactory. Further analyses and studies must be conducted to identify the prognostic factors for the late sequelae. Whether it is possible influence these factors by additional surgical intervention cannot be answered at present.

Acetabulum↗

[Tumoral calcinosis--an independent disease?].

Tumoral calcinosis has up to date been considered as an independent disease. The survey of the literature shows that only its clinical and radiological appearance are generally accepted while its epidemiology and etiology are still under discussion. A genetical disorder, recurrent soft tissue microtrauma or terminal renal failure are blamed to cause tumoral calcinosis. All these causes may lead to localized or generalized disturbance of the calcium-phosphate-metabolism which in turn causes tumoral calcinosis. Therefore tumoral calcinosis should be regarded as a rare symptom of a metabolic disorder rather than an independent disease. Clinical appearance and treatment of two cases of tumoral calcinosis are reported followed by a review of the literature.

Adult↗

[Reichel syndrome. A case report with review of the literature].

In the case report presented, we describe the Reichel syndrome-synovial chondromatosis. The disease is monoarticular, involves no trauma or inflammation, and tends to cause a build-up of floating cartilage. Its prognosis is good. On the basis of a review of the literature, we present its etiology, diagnosis, differential diagnosis and histology. For the initial treatment we recommend resection of the floating cartilage. If the disease occurs, we recommend synovectomy in addition.

Adult↗

[What are the advantages of UTN (unreamed tibial nail) in open tibial fractures?].

The AO-unreamed tibial nail (UTN) is an alternative to external fixation in the treatment of open tibial fractures. In order to compare the two implants we did a retrospective study. 70 unselected cases of open tibial fractures were treated by either method. 35 patients with primary UTN were compared to another 35 patients with primary external fixator. Demographic data, localisation and classification of fractures and soft tissue trauma showed no differences between the two groups. The main complications in UTN-group were hardware problems, in external fixator-group infections. Following UTN-treatment duration of first hospital stay and whole fracture treatment were shortened with earlier full weight bearing and fracture healing. Our study shows advantages in the treatment of open tibial fractures using the UTN compared to the external fixation.

Adolescent↗

[Pediatric femoral shaft fracture: effect of treatment procedure on results with reference to somatic and psychological aspects].

When treating femoral shaft fractures in children both somatic (axial/rotational misalignment) and psychological sequelae of the treatment have to be taken into consideration. We performed a retrospective study on the somatic and psychological outcome in 38 children under the age of 10 years with femoral fractures from 1989 to 1991. Twenty-four were treated conservatively (i.e. by traction), while 14 had surgery. Average time in hospital was significantly shorter in the operative group (9 days) than in the conservative group (37 days). The rate of rotational misalignment > 10 degrees was 14% after operation and 45% after traction. Psychological evaluation revealed a positive influence on intellectual development in 21% of conservatively treated children but there were disturbances in motor development (37%), family environment (17%) and general health (25%) in this group. Operative treatment was superior in causing no adverse effects in these fields. We therefore recommend surgery for femoral fractures in children older than 3 years.

Adaptation, Psychological↗

[Closed tibial fracture--reamed or unreamed intramedullary nailing. A clinical study].

When comparing the unreamed tibial nail (UTN) with the external fixator in the treatment of open tibial fractures the UTN has shown advantages. Whether we can find these advantages also in the treatment of closed tibial fractures using the UTN instead of a reamed system should be clarified in the following study. We compared 35 UTN treated patients with 35 patients that were treated with a reamed A0-universal tibial nail. Both groups showed no differences in age, sex, etiology and severity of trauma. The fractures were classified by the A0-classification of fractures and the soft tissue damage by the classification of Tscherne and Oestern. The length of mean hospital stay, the time of partial weight bearing and the duration of fracture healing, were shorter using the UTN. 5 of 9 complications using the UTN were immanent to the system (deformation of the locking screws). The other complications were 2 axis shifts, 1 compartment syndrome and 1 pseudarthrosis. The other group showed 1 hematoma, 1 axis shift, 1 compartment syndrome, 2 thromboembolic complications, 2 infections and 3 cases of pseudarthrosis. We think that there is an advantage to use an UTN instead of a reamed nailing system in treatment of closed tibial fractures.

Adult↗

[Not Available].

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Biology↗

[Can unreamed tibial nailing replace external fixators in management of open tibial fractures?].

The recently developed unreamed tibial nail (UTN) offers a new possibility for biological osteosynthesis by intramedullary stabilization for tibial fractures including those with severe closed and open soft tissue damage. In a retrospective study we compared the well established method of external fixation with unreamed intramedullary nailing for open tibial shaft fractures. The data of our first 15 cases treated primarily by UTN (Group 1) and another 15 cases comparable in etiology, severity of trauma, fracture classification, open soft tissue damage and the rate for myocutaneous flaps and skin-grafts, treated initially by external fixation (Group 2) were reviewed. Septic complications were only seen in group 2 and made necessary a lot of following additional operations. One angular deformity was seen in each group. Group 1 showed a mean hospital stay of 26.3 days compared to 75.7 days in group 2. Full weight-bearing was achieved after 1.8 months (group 1) whereas it took 4.5 months in group 2. The first clinical experience using the UTN shows an obvious advantage in comparison to fracture management by external fixation mainly due to a low complication rate and a much shorter over all surgical treatment period.

Adolescent↗

[Is there a classification of pelvic ring injuries, which takes the trauma mechanism, morphology and stability relations into consideration and thereby gives references for subsequent therapy?].

In contrast to earlier classifications, Tile's classification of pelvic ring disruptions considers mechanism of injury, clinical and x-ray evaluations and is therefore almost universally accepted. We propose a more comprehensive classification which gives a guide for treatment of these complex injuries. Moreover it can be used to compare results from different authors. We classify types A-D pelvic injuries according to stability. Type A consists of fractures of the pelvis not involving the ring, type B of stable rotational injuries. Type C and D encompass the unstabile injuries: C is purely rotational and D has a combined rotational and vertical instability. The location of injury is indicated by adding numbers 1-9 (1: rupture of symphysis pubis; 2: transpubic fracture; 3: acetabular fracture; 4: iliac wing fracture; 5: sacroiliac fracture-dislocation; 6: sacroiliac disruption; 7: sacral wing fracture; 8: transforaminal sacral fracture; 9: central sacral fracture). These numbers are arranged in increasing order, one hemipelvis after the other. Thus, in case of a complex pelvic injury with rotational instability on one side and vertical instability on the other each hemipelvis may be classified separately.

Fracture Fixation, Internal↗