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Biomedical subjects

A Gebauer

Publications and source records attributed to A Gebauer.

At least 37 records · Page 2Linked to original sources
PubMed1984

[Aneurysm of the superior mesenteric artery. Its diagnosis and clinical significance].

This is a report about 4 patients with aneurysms of the superior mesenteric artery of arteriosclerotic, mycotic and probably congenital etiology together with a review of the literature as to the etiology, diagnostic possibilities and therapy. Arteriography is the method of choice even though a diagnosis may be possible by sonography or CT in special cases. Even though an aneurysm of the superior mesenteric artery is rare, it has to be considered in the differential diagnosis of persisting abdominal problems of unknown origin. This is especially true for patients with a predisposing history such as previous or existing endocarditis, sepsis, arteriosclerosis and hypertension. Because of the possibility of rupture followed by life threatening bleeding an adequate diagnostic step such as arteriography has to be considered finally.

Adult↗
PubMed1983

[2-dimensional echoencephalography or cranial CT in premature or newborn infants with suspected intracranial hemorrhages].

65 newborns or low-birthweight infants with suspicion of intracranial hemorrhage were examined with B-mode small part scanners. In 12 cases the diagnosis made by ultrasound could be compared with CT. There was a similar accuracy of both methods in case of intraventricular (IVH) and subependymal (SEH) hemorrhage. SEH seems to be easier detected by US. On the other hand there are problems in diagnosing subdural (SDH) and intracerebral (IHC) hemorrhages by US. These problems are caused by the adjacent skull, but does not exist for CT. B-mode-Echoencephalography is the method of choice for examination of high risk infants and for the follow up, because US is a cribside method and of high diagnostic accuracy. CT-studies should be done in case of hemorrhage adjacent to the skull and if the US-diagnosis seems not to be reliable.

Cerebral Hemorrhage↗
PubMed1981

[Significance of ultrasonography in diagnosing complications following renal transplantations (author's transl)].

Routine follow-up examinations by ultrasonography after renal transplantation were performed in 72 patients from December 1978 until March 1980. The aim of these controls was to recognize local complications in the area or surgery in order to differentiate from a rejection reaction in patients with unclear clinical symptoms. 22 out of 72 patients had local complications. 15 out of those 22 were detected by ultrasound in a state without clinical symptoms, which then could be treated by surgical or urological intervention. We therefore believe that routine follow-up examinations after renal transplantation by ultrasound are indicated in order to recognize local complications. Nuclear procedures should be employed if alteration of blood flow or disturbed function of the transplanted kidney are considered.

Graft Rejection↗
PubMed1981

[Computed tomography and densitometric pattern of pulmonary lesions (author's transl)].

Fifty-five peripheral pulmonary lesions in 46 patients were examined by computed tomography. The results were correlated with histologic diagnoses. The series comprised 26 bronchial carcinomas, 17 metastases, 4 chondromas, 5 tuberculomas and 3 echinacoccal cysts. The high resolution capacity of CT in the evaluation of macro pathologic pattern specially with the electronic image processing, with densitometry in regional interest is emphasised. Therefore cysts, fatty and other solid masses in the lung can be distinguished. Further more one can gain information of the underlying tissue on the basis of absorption profile.

Absorptiometry, Photon↗
PubMed1981

[Angiographic and isotopic studies following pole resection of kidneys in dogs and hemostasis performed by infrared-contact-coagulation (author's transl)].

It has been shown in an animal experiment that alterations of the renal vasculature and parenchyma after hemostasis performed by Infrared-Contact-Coagulation are best shown by intravital magnification angiography (magnification factor 2.22). Following pole resection and hemostasis the final morphologic state is reached 6 weeks postoperatively. The resulting scar penetrates into the parenchyma up to 1 cm. The loss of function corresponds to the parenchymal defect. There was no additional loss of renal function or damage to the parenchyma on nuclear medicine or histologic examinations.

Animals↗
PubMed1981

[Percutaneous transluminal removal of embolised catheter fragments (author's transl)].

Seven patients had a percutaneous transluminal removal of catheter fragments using a Dormier stone-basket within the last 14 months. An immediate intervention should be performed because serious complications are expected from catheter embolization. The percutaneous transluminal catheter retrieval as a method of low risk and of little discomfort to the patient should always precede surgical procedures. The Dormier-basket proved to be a successful and easy handling catheter instrument in all our cases.

Adult↗
PubMed1981

[Radionuclide angiography (RNA) with 99mTc-DTPA to follow palliative embolization of renal cell carcinoma (author's transl)].

In 14 patients with renal cell carcinoma, not to be treated by nephrectomy, radionuclide angiography with 99mTc-DTPA (RNA) was employed before and after palliative tumor embolization. If RNA revealed remaining perfusion of the tumor, functional scintigraphy with 131J-hippurate was performed to detect and quantify residual function. Up to 16 months after embolization, 7 patients (50%) revealed neither residual perfusion nor function. In 5 patients (36%) remaining perfusion without functioning renal parenchyma and in 2 patients (14%) residual perfusion with additional function were found. In 4 cases (28%) a nuclear "tumor-halo" was imaged, describing a stripe of high radioactivity caused by capsular arteries surrounding the avascular tumor. RNA has proven to be a suitable non-invasive procedure for to blow-up of embolized renal cell carcinomas.

Adenocarcinoma↗
PubMed1979

[Correction of unilateral 131I-hippuran clearance by sonographic evaluation of kidney depth (author's transl)].

In 47 patients the value of kidney depth measurements for the correction of unilateral 131-I-hippuran clearances was studied using ultrasonography. The accuracy of this method was found to be superior to that of the lateral scintigram. In cases with normal cranio-caudal position or slight unilateral caudal dystopia the maximum difference in kidney depth was 1.25 cm and a maximum correction of the unilateral clearance in 2.8% was necessary. Kidneys with unilateral caudal dystopia differed up to 6 cm in depth, leading to a correction by 12%. Our findings indicate that a correction for kidney depth is necessary if one kidney shows significant caudal dystopia and slight dystopia in the supine position. In patients with nephroptosis position-dependent alterations of unilateral perfusion can only be evaluated by correcting for kidney depth.

Adult↗
PubMed1978

[Preoperative and postoperative stomach evacuation studies via methods of nuclear medicine and methods of roentgen cineradiography (author's transl)].

A combination of roentgen cineradiography and functional scintigraphy of stomach evacuation, taken with a gamma camera, was used for assessing the success of organ-conservative surgery of ulcers (selective proximal phagotomy with or without pyloroplasty). This confirmed earlier results to the effect that surgical failure is not indicated with any measure of certainty by any individual roentgenologic symptom. However, the evacuation function is closely correlated with the pattern of clinical and subjective complaints. In most of the cases, rapid postoperative stomach evacuation results in freedom from complaints. Pyloric stenosis and retention point to the failure of the operation via the negatively effected subjective feeling of well-being. Hence, special importance must be attached to functional scintigraphy with regard to meaningful studies of the course and postoperative condition of the patient.

Gastric Emptying↗
PubMed1978

[Sonographic examination in diseases of the scrotal area (author's transl)].

Sixty-two patients with diseases of the scrotal area were examined sonographically. In 11 out of 12 testicular tumors, a preoperative diagnosis could be confirmed by examination with ultrasonication, including one case with large accompanying hydrocele, which made an exact palpation of the testicles impossible. Despite the still small number of cases, we feel that ultrasonic examination of the testicles makes it possible to speed up the diagnosis of testicular tumors, which is often drawn out over weeks or months, and to provide the patients with early operative therapy.

Humans↗