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Biomedical subjects

H K Deininger

Publications and source records attributed to H K Deininger.

At least 19 recordsLinked to original sources
PubMed1993

[Dynamic cranial CT in ischemic cerebral lesions].

58 patients with recent transient or permanent neurologic deficits of with proven carotid stenoses were examined by dynamic CT at the level of the internal capsule. In the presence of cerebral infarcts there was marked delay in the time/density curve with reduced peaks. Abnormal perfusion could be demonstrated by early examinations before definite morphological changes were seen. With transient ischaemic attacks there were no significant changes in perfusion; in the presence of carotid stenoses the results were variable. The perfusion abnormalities in the hemispheres shown by dynamic cranial CT could be confirmed to some extent by 99mTc-HMPAO-SPECT.

Adult↗
PubMed1992

[Ganglioneuroma of the pelvis accompanying pregnancy].

Ganglioneuroma is an uncommon benign tumor of the sympathetic nervous system. In most cases it originates from the thoracic or lumbar portion of the gangliated cord or from the medulla of the suprarenal glands. It is the differentiated form of malignant neuroblastoma. The tumor often manifests itself in young adults by displacement of the surrounding structures. In the case presented the special diagnostic problems of locating the tumor in the pelvis in early pregnancy are discussed.

Adult↗
PubMed1992

[The current situation of radiologic diagnosis of blood vessels].

The current situation with regard to vascular diagnostics in West Germany is analyzed on the basis of the results of a survey of large non-university institutes of radiodiagnostics. The operative equipment present is generally appraised as being adequate. However, equipment for the performance of digital subtraction angiography must be available. The importance of the intravenous technique is clearly diminishing. In some cases, large-format angiograms are completely dispensed with. The frequency of angiography is greatly decreasing. The expenditure of time and effort for the individual investigation has become greater, so that the angiographic equipment and rooms are used to a much greater extent in terms of time. A fairly uniform observation was that about 60% of all arteriographies are necessary because of sclerotic vascular conditions (AOD). These are often combined with interventional measures. The arteriographies are mainly carried out in the lower limbs (50-70%). The remainder is distributed in thoracic and, in particular, abdominal angiographies, among which the renovasographies still predominate. Numerous leg phlebographies are carried out everywhere and account for 85-95% of all venographic investigations. There has been a great decline in lymphographies throughout Germany.

Angiography↗
PubMed1991

[Problems in recognizing recurrences of craniocervical malignancies in CT].

A retrospective study was carried out involving 39 patients with malignant tumours of the head and neck in order to differentiate by CT changes due to local tumour or lymph node recurrences and various post-operative or post-irradiation changes. In these patients, two or more CT examinations of the neck were available, derived from a fourth generation scanner. The suspected lesions were classified according to their type and the appearances correlated with the treatment and clinical findings. There was frequent overlap between the appearances of benign and malignant changes, so that in individual cases a definite decision often proved impossible.

Adult↗
PubMed1991

[The value of the acetazolamide stimulation test with 99mTc-HMPAO-SPECT in reversible cerebrovascular insufficiency].

Regional cerebral blood flow reduction was measured in 84 patients with CVI using 99mTc-HMPAO-SPECT. 53 patients received 1 g acetazolamide to evaluate cerebrovascular reserve capacity. Differentiating between hemispheric (87%) and vertebrobasilar ischaemia (64%) revealed markedly increased sensitivity for the provocative test with acetazolamide. In 62% of high grade but asymptomatic carotid stenoses a haemodynamic effect was demonstrated with acetazolamide and thereby the indication for surgery was supported.

Acetazolamide↗
PubMed1991

[Outpatient transbrachial arterial DSA using a 4F catheter for the clarification of extracranial vascular processes].

Experience with intravenous digital subtraction angiography (DSA) has proven disappointing in the outpatient evaluation of cerebrovascular disease. Variations in cardiac output, vessel superimposition, patient motion and poor vascular opacification frequently combine to produce nondiagnostic examinations. To assess the safety of nonselective intra-arterial DSA performed from a brachial artery approach, the complications of 103 examinations, most of which (85%) were performed on outpatients, were prospectively studied. The injection of contrast material into the aorta was made through a 4F multiple side-hole pigtail catheter, inserted percutaneously from the brachial artery. Images were good or excellent in nearly all cases. No permanent neurovascular complications or local artery complications such as thrombosis requiring surgery were encountered and only a few minor complications occurred. We believe that transbrachial intraarterial DSA is a safe, simple and well-tolerated out-patient procedure that can yield reliable, definitive, and complete cerebrovascular studies in nearly all patients referred for the examination.

Adult↗
PubMed1990

[Digital image intensifier radiography: a new concept for traumatologic x-ray diagnosis?].

Digital image intensifier radiography visualises all traumatological changes of clinical relevance and can therefore be used in traumatology. However, the quality of conventional radiographs cannot be attained as yet. Radiation exposure is markedly reduced, and radiographs are obtained directly after exposure, so that this is an extremely rapid radiographic procedure. Images can be quickly transmitted by video cable to the relevant departments and working places.

Humans↗
PubMed1990

[The computed tomography of colorectal tumors with water as the contrast medium].

The diagnosis of colorectal carcinoma is based on double-contrast barium enema and endoscopy. However, in contrast to computed tomography (CT), these modalities do not permit a precise preoperative prediction wether a tumour is limited to the bowel wall or has spread into surrounding tissue. To improve the detection of colorectal neoplasms by CT we prospectively studied the use of intrarectally administered water for CT scan in 16 patients with colorectal cancer proved by barium enema and endoscopy. The water repletion technique allowed an improved depiction of the large bowel wall, and the primary tumour was demonstrated by CT in all cases. Furthermore the use of water prevented artifacts which was helpful in the evaluation of the liver for suspected metastases.

Aged↗
PubMed1990

[Budd-Chiari syndrome].

Modern imaging techniques are presented in a case of Budd-Chiari syndrome. The etiological, clinical and therapeutic aspects of this rare type of hepatic vein occlusion are discussed.

Angiography, Digital Subtraction↗
PubMed1990

[Atypical pneumonia?].

Explore the source record for details and available documents.

Granulomatosis with Polyangiitis↗
PubMed1990

[Methodologic optimization of computerized tomography diagnosis of the large intestine].

Examination of the intestine by computed tomography can supply additional information on diseases of the intestinal wall. However, the successful interpretation of the bowel wall by CT requires a special technique by which normal structures are opacified, identified and not mistaken for abnormal masses. The rectal administration of water improves the visualisation of the bowel wall and the diagnostic accuracy. This safe, reliable and acceptable method for opacifying the colon and rectum is described. Its value is demonstrated by means of normal and pathological examples.

Adult↗