Biomedical subjects

K Spohn

Publications and source records attributed to K Spohn.

15 recordsLinked to original sources

PubMed1985

[Defective shaft positioning in medullary nailing as a result of play of the nail--a biomechanical analysis].

The influence of the nail wall thickness on the stress distribution is shown for the AO-nail as well as the Küntscher-nail. The quality of the analytical solution is proved by demonstrating that the presence of the slot in the nail does not shift the bending stresses merely. The gap between nail and bone is shown to be responsible for misalignments in the fracture.

Biomechanical Phenomena↗

PubMed1984

[Biomechanical studies of bone treated with intramedullary nailing, with special reference to possible axis deviations].

The effect of a misalignement of a nailed bone on the stress distribution in the cross section is shown theoretically. Also for pure axial loading of the bone a superposed bending due to the misalignement produces large tension stresses as well in the nail as in the bone, when the fracture is not healed. After healing the stresses in the nail and in the bone are reduced striking. The removing of the nail does not increase the stresses in the bone significantly.

Biomechanical Phenomena↗

PubMed1984

[Theoretical studies on stress protection in fractures treated by osteosynthesis].

Using a simple model geometry the effect of stress protection in a bone caused by combination with a metal plate is studied. It is found that no global stress protection exists in any case. The stresses in the bone can be higher than in the homogeneous bone without any reinforcement. Therefore, a consideration of any special type of implantation should be done.

Biomechanical Phenomena↗

PubMed1979

[Postoperative abdominal hernia and its treatment. Results in 438 patients].

The postoperative incisional hernia can be found after any incision, any suture, and also when the technique was as subtle as possible. The frequency ranges from 1--5%. The causes, the frequency, the suture-techniques, and the methods for reparation of an incisional hernia are described. In our clinic in 18 years (1.5. 1960--30.4. 1978) 438 patients were operated with an incisional hernia. The localizations, preoperative diseases, and the methods of operations applied are described and discussed. We were able to get postoperative information of 277 patients, information by letters and own investigations as well. The results are discussed. As far as we know our figures represent the greatest number of cases published. The own late results of operated hernias are described. In other publications a frequency of 15--20% of recurrencies is quoted. In respect to this our own results with "edge-to-edge-technique" and "doubling of the fascia" are satisfacotry.

Age Factors↗

PubMed1975

[Carcinoma of the pancreas: palliative surgery (author's transl)].

Among 1146 patients with diseases of the pancreas observed over a 15-year period, there were 234 cases of malignant duodeno-pancreatic tumors. This report concerns the intraoperative diagnostic methods and the various palliative operations available. There was a ratio of 13 males to 10 females, and the average age was 63 years. In 24.3 percent of the patients attempts to establish the diagnosis intraoperatively by puncture or excision were unsuccessful. The cardinal symptom in 71 percent of these cases was icterus. Duodenopancreatectomy was possible only in 21 cases (= 8.9%). In 173 cases (= 75.2% of all patients) a palliative operation was performed.

Adult↗

PubMed1973