Biomedical subjects
U Baer
Publications and source records attributed to U Baer.
A new targeting device for stereotaxic procedures within the CT scanner.
A new targeting device is reported which makes it possible to perform stereotaxic procedures within CT scanners under tomographic control. The zero position of the biopsy needle is the reference point for all measurements. The head of the anesthetized patient is immobilized with firm plastic cushions in a special head holder. This unit can be used for biopsies, preoperative marking of small lesions, therapeutic punctures, and placement of radioactive substances into inoperable brain tumors.
[Late radiation damage to intestines following irradiation of gynaecological tumours (author's transl)].
Causes, pathophysiology, types, and dimensions of late radiation damage, following irradiation of gynaecological tumours, are described together with the prognosis of such damage, with reference being made to published data. Intestinal surgery for radiogenic damage had to be applied to 19 patients, between 1969 and 1979. The patients had received therapeutic irradiation of gynaecological tumours, between three months and 23 years before surgery. The colon had been involved in nine cases, the small intestine in seven, and both intestinal sections in two. Postsurgical mortality accounted for 36.8 per cent.
[Swine liver ultrastructure following hypothermia and hyperbaric oxygenation preservation].
The livers of 20 pigs were preserved for up to 16 hours, applying hypothermia (4 degrees C) and hyperbaric oxygenation (3 ata). As a preparation solvent we used in one group the solution by Lie (17) which is rich in potassium and glucose, and in the other group the cryoprecipitated serum by Belzer (5). After 8 and 16 hours of preservation, the fine structure was examined light- and electronmicroscopically. After 8 hours of preservation, there were only little reversible changes in both groups. After 16 hours, both groups showed distinct changes of the endoplasmatic reticulum e. g. desorganisation, vesicular dilatation, and dissociation of the mural ribosomes. In addition, there were swellings of mitochondriae and Kupffer's cells. These changes were particularly distinct after preservation in cryoprecipitated serum. In this group a cellular depletion of glucogen was noticeable.
[Clinical signs and therapy of the abdominal aortic aneurysm (author's transl)].
The abdominal, infrarenal aneurysm of the aorta shows a very unfavorable spontaneous outcome. Therefore, every patient should be operated on without delay. The surgical procedure consists of a partial resection of the aneurysm and the reconstruction of the vascular flow by means of a synthetic prosthesis. The most dangerous complication of the aneurysm is its rupture. Emergency surgery of a ruptured aneurysm is accompanied by essentially higher risks: The mortality rate lies between 34 and 90%. The prognosis of the operation varies with the patient's age, coronary sclerosis, and renal insufficiency. The diagnosis of the aneurysm can clearly be made with sonography, angiography, and computer tomography. In the case of a ruptured aneurysm, clinical signs are of primary importance. Angiography is not indicated here. From May 1969 until November 1976, 41 patients were operated on in our clinic: 23 electively and 18 after rupture. The mortality rate of the elective cases amounted to 17% and that of the ruptured to 72%.
[Portocaval emergency shunt in severe esophageal varices hemorrhage].
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[Surgical aspects of colonic diverticulitis].
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[Prevention of postoperative thrombo-embolism with acetylsalicyclic acid (author's transl)].
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