Biomedical subjects

C Eingartner

Publications and source records attributed to C Eingartner.

26 records · Page 2Linked to original sources

PubMed1997

[Injuries due to inline skating].

In order to elucidate the patterns of injuries associated with in-line skating all patients with a inlineskate injury have been sampled prospectively during summer 1996. 58 patients were included in the study, aged 8 to 54 years (mean 22.2 years). The total number of injuries was 63, that is 1.1 injury in every injured skater. The upper extremity was the region most commonly injured (63.5%), with the distal radius fracture being the most common single fracture (25.4%). The most severe injuries, however, could be found in the lower extremity, including two femoral neck fractures and one pertrochanteric fracture in three patients aged more than 35 years. 22.4% of patients required hospitalization up to 54 days, and 36.2% of injuries had to be treated operatively. The most common single procedure was closed reduction and percutaneous wire fixation of displaced radius fractures. It is concluded that in-line skating imposes a risk of severe injuries especially on first-time skaters aged 35 years and up. The typical skating injury is the fracture of the wrist, a fact pointing out the necessity of the use of appropriate safety gear.

Adolescent↗

PubMed1997

[Low loosening rate of a cemented titanium straight shaft prosthesis in long-term follow-up].

Aseptic loosening is still a major problem in total hip replacement. We studied the mid-term results of a straight stem femoral prosthesis made from titanium alloy (BiContact) and implanted with the use of bone cement. 250 hips in 238 patients have been implanted between 8/87 and 12/88 and followed up. 172 patients were alive and could be reached after 7 years. Two patients had to undergo revision surgery within the follow up period, and in two other patients radiolucencies could be found. A loosening rate of 1.2% and a rate of radiolucencies of another 1.2% indicate that the combination of a titanium alloy stem prosthesis with bone cement not necessarily leads to early loosening or a high loosening rate, which has been supposed by several authors. The design of the individual prosthesis seems to be of greater importance than the materials used.

Adult↗

PubMed1996

[Revision operations after failed arthrodeses of the upper ankle joint].

Although non-union of ankle arthrodesis is reported to be a common problem there is sparse literature regarding technique and results of revision arthrodesis in this difficult situation. We performed revision arthrodesis in 22 cases, either by means of a resection-compression revision arthrodesis or a tibiotalar sliding graft. According to our experience a subtle operation technique with cancellous bone grafting and particular attention to soft tissue can achieve bone healing with good functional results in about 90% of cases.

Ankle Injuries↗

PubMed1995

[Primary total endoprosthetic hip joint replacement in acetabulum fractures].

Conservative treatment of acetabular fractures mean a long period with immobilisation followed by quite a few of complications that are life-threatening to old patients. Besides that these fractures often cause painful posttraumatic osteoarthritis of the hip joint. Open reduction and osteosynthesis is favored more and more, but the complications described cannot be avoided absolutely by surgical treatment. The sequelae are risky reoperations and the necessity for implantation of total joint prosthesis. As shown in the enclosed case reports, total hip replacement can be emphasized as first step and as definitive surgery. Implantation of an artificial joint allows postoperative remobilisation with full weight bearing and long lasting immobilisation can be avoided. Therefore this kind of therapy is justified for treatment of old and polymorbid patients as an out of rule therapy.

Acetabulum↗

PubMed1994

[Bone repair in pseudarthrosis after arthrodesis of the upper ankle joint].

Delayed union or non-union of ankle arthrodesis is a common problem and revision arthrodesis is necessary in those difficult cases. Three cases are presented, in which a non-union after tibiotalar or tibiacalcanear fusion could be treated effectively with a bone graft taken from the anterior cortex of the distal tibia or from the anterior iliacal spine. The bone graft was fixed proximally with a screw. Distally the graft was inserted in an slot gouged into the talus or the calcaneus respectively with or without screw fixation. Postoperative care included short-time external fixation and immobilisation with a shortleg weight bearing cast. We conclude that the technique of a sliding tibiotalar graft can be used for effective treatment of non-union following ankle arthrodesis.

Adult↗

PubMed1994

[Correction of post-traumatic deformity after femoral intramedullary nailing].

Posttraumatic deformities of the femoral shaft secondary to intramedullary nailing of femoral shaft fractures consist in rotation deformities, leg shortening or axis deformities, which are either single deformities or combined with each other. The most common deformity is external rotation with or without posttraumatic length discrepancies. 16 cases, in which corrective osteotomies have been performed in the years 1985 to 90 in the Berufsgenossenschaftliche Unfallklinik Tübingen are analyzed; indications, techniques and results are discussed.

Adolescent↗

PubMed1983

[Late potentials and delayed intrinsic deflections in acute regional ischemia of the heart].

Waveforms occurring at the end of the QRS complex or during the ST-segments, T wave, or diastolic intervals are defined as "late potentials". Whether late potentials reflect delayed regional activation is still under discussion. A correlation with electrophysiological parameters directly indicating delayed activation has not yet been made. The present study was performed in isolated porcine hearts (n = 12) perfused according to the Langendorff method. An ischemic zone was produced by occlusion of the anterior descending branch of the left coronary artery. Unipolar epicardial electrograms were recorded by means of nonpolarizable electrodes using DC-amplifiers (0-1250 Hz). We measured the intrinsic deflection of the ischemic zone electrogram and compared it to deflections within the ST-segments of the normal zone. When activation of the ischemic zone was progressively delayed, the intrinsic deflections and the deflections within the ST-segments were also progressively delayed. When 2:1 block at the edge of the ischemic zone occurred, deflections within the ST-segments showed the same sequence. When premature stimuli were applied, both deflections could be delayed until they outlasted the ST-segment duration. If this occurred, ventricular tachycardia developed. Our data demonstrate a definite correlation between late potentials and delayed intrinsic deflections, and suggest that late potentials in acute regional ischemia are due to extracellular current flow which might be sufficient to induce malignant ventricular dysrhythmias.

Action Potentials↗

PubMedDate not supplied

[Osteogenesis in exposure to ionizing radiation in vitro].

Irradiation is a well established therapeutical concept to prevent heterotopic ossification after joint replacement. The influence of irradiation on proliferation of mature osteoblasts and their potential osteoprogenitors, matrix formation and mineralization are not well known in this setting. We therefore studied the effect of different doses of ionizing irradiation on the several steps of osteogenesis in vitro, using cells isolated from the juvenile rat. A colony forming test, the MTT-viability assay, a cell count, measurement of the cellular protein content and alkaline phosphatase activity, as well as determination of in vitro mineralisation have been applied to calvarian osteoblasts, fibroblasts and stromal bone marrow cells. Irradiation results in a dose-dependent suppression of clonogenic activity in all mitotically active cells, but metabolic activity and matrix synthesis were not impaired. In dense cultures alkaline phosphatase expression and in vitro mineralisation were not significantly affected by irradiation. Our experimental in vitro data suggest that irradiation inhibits the initial phase of in vivo osteogenesis due to the cytostatic effect. Postoperative irradiation after THR must therefore take place as early as possible. The homoeostasis of normal, orthotopic bone does not seem to be severely affected by local low-dose irradiation.

Alkaline Phosphatase↗