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Biomedical subjects

N Schwarz

Publications and source records attributed to N Schwarz.

At least 91 records · Page 5Linked to original sources
PubMed1982

[Treatment and results in acute pyogenic arthritis].

Pyogenic arthritis poses a serious complication to the opening of a joint. In the past eight years we have treated 22 patients suffering from acute infection of the knee joint and the talo-crural joint. Cases with infection of osseous origin were excluded. Infection was mainly caused by contamination during ligament reconstruction. Our therapy consisted of emergency operative revision of the joint, removal of necrotic tissue, and installation of an irrigation-suction-drainage system. The joints were immobilized and systemic antibiotics were administered in all cases. In four cases the installation of the irrigation-suction-drainage system in the knee joint was performed percutaneously without opening the joint. Of these, three had to be reoperated as the infection could not be controlled. During recent years we preferred to use a 0.5% PVP-I-solution for irrigation, because of the antiseptic effect. Irrigation treatment is limited to a period of seven days. Two out of 15 cases of knee-joint infection and three cases out of seven of talo-crural-joint infection resulted in ankylosis. In cases in which treatment began in the first week after contamination almost all had excellent clinical results. Substantial previous damage to the joint or delayed treatment usually prevented complete restoration of the joint's function.

Acute Disease↗
PubMed1981

[Wound cleansing with the enzyme combination fibrinolysin/deoxy-ribonuclease].

This clinical investigation was performed to evaluate the therapeutic efficacy of enzymatic wound débridement. Fibrolan (Elase), a combination of fibrinolysin and desoxyribonuclease, was administered in 42 patients with infected accidental or operation wounds. After a treatment over 12 to 14 days all but two wounds showed clean granulation tissue and secondary wound closure could be achieved. There was no sign of adverse drug reaction. A recommendation of this method in the treatment of infected wounds can be given.

Adolescent↗
PubMed1981

[The experimental measurement of torque and axial force of 6.5 mm ASIF lag screws in fixation of femoral neck fractures (author's transl)].

An experimental study was undertaken to evaluate the torque and axial force of the 6.5 mm ASIF lag screw implanted in the femoral neck after a subcapital osteotomy. The experiments were carried out on autopsied bones of more than 60 years of age. The average torque was 204 cmN, the screws in the upper half of the femoral head showing a higher torque than those in the lower half. The axial tension was measured by strain gauge transducer. Depending on the length of the thread of the screw (16 or 32 mm) the average tension reaches 1162 N or 1960 N. By tightening the screw until the impression of optimum fit is obtained, 70% of the maximum axial force is reached. It can therefore be estimated that at the beginning an interfragmentary pressure of 4000 to 8000 N is exerted on a medial femoral neck fracture fixed by four ASIF lag screws.

Biomechanical Phenomena↗
PubMed1981

[The lag screw fixation of medial femoral neck fractures (author's transl)].

The lag screw osteosynthesis of medial femoral neck fractures is a straightforward procedure with little danger of complications. A conclusion may be drawn from the results of several authors that this method may even have a favourable influence in reducing the frequency of pseudarthrosis. In order to come to a final conclusion, however, the results of large treatment programmes would have to be studied. Fractures which are technically accurately treated allow probably full weight bearing. Lag screw osteosynthesis using more than 2 spongiosa screws in a parallel position has proved, both theoretically and practically, to be a useful method of treatment. The caudal screws increase the stability due to their position on the caudal rim of the femoral neck, while the cranial screws ensure against rotation and exertion of tensile force.

Biomechanical Phenomena↗
PubMed1981

[Incidence of open fractures in children (author's transl)].

In nine years 8144 cases of fractures in children were treated in Lorenz Böhler Accident Hospital in Vienna. 5.3% of these were fresh open fractures, more than half of which were of the thumb and fingers, with a large proportion of open fingertip fractures. These were followed by, in order of frequency, forearm fractures, skull fractures and tibia fractures. On average, 63% of the patients were boys, the percentage increasing, however, with age. Pre-school children constituted about half as many of the patients as children of school age. Traffic accidents, mainly those involving pedestrian children, caused three times as many open fractures as closed fractures. The figures given are compared with the number of closed fractures.

Accidents↗
PubMed1976

[Venous thromboses and pulmonary emboli in autopsy material (author's transl)].

Venous thromboses of the pelvic veins and the veins of the lower limbs were found in 40% of the post mortems carried out on 1350 adults during 1974. The thromboses were bilaterally located in the calf veins in the vast majority of cases. The predominating underlying diseases of patients with thrombosis were malignant neoplasia or cardiovascular diseases. 319 cases (23.5%) showed massive pulmonary embolism. The pulmonary embolism had taken a fulminating fatal course in 7.8% of cases. Thromboses of the lower limb veins seem to have a higher tendency to become mobilized to cause fatal pulmonary embolism than thromboses occurring in other sites. A significantly higher incidence of venous thrombosis, as well as of pulmonary embolism, was found in higher age groups and in female patients; the prognosis is, moreover, grave in these cases. A significant increase in the incidence of venous thromboses and pulmonary embolism-especially those with a rapidly fatal course-has been registered over the past years as compared with previous investigations.

Adolescent↗