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Biomedical subjects

D Banzer

Publications and source records attributed to D Banzer.

At least 73 records · Page 4Linked to original sources
PubMed1983

A comparison of conventional contrast ventriculography and digital subtraction ventriculography.

We studied 46 patients with a history of transmural myocardial infarction or angiographic evidence of coronary artery stenosis with both conventional contrast ventriculography and digital subtraction ventriculography from May to September 1982. Urografin 76, 30 ml, was administered at a flow rate of 18 ml/s, by means of a catheter in the superior vena cava during digital subtraction ventriculography (DSV). Results of the latter were compared with conventional contrast ventriculograms. The correlation coefficient was r =0.938 (p less than 0.001) for determination of ejection fraction with both methods. The data in individual cases suggest that DSV is more sensitive than conventional contrast ventriculography in determination of severely reduced ejection fractions. The methods are practically identical in qualitative evaluation of disorders of regional wall motion in the anterolateral region, while DSV is more sensitive than conventional ventriculography in evaluating the apical region. Sensitivity was 85.7% when the two methods were compared in evaluation of the inferior region of the left ventricle. Both methods are identical in demonstration of severely deformed ventricles. Digital subtraction ventriculography may replace conventional contrast ventriculography in some of the situations discussed above.

Adult↗
PubMed1983

[Possibility of error and difficulties in the computerized tomographic diagnosis of lumbar intervertebral disk prolapse].

In 310 computed axial tomograms of the lumbar spine which were studied retrospectively a number of pitfall situations were encountered. These in part were related to technical limitations, in part to degenerative joint disease and to postoperative hypertrophic scar formation. It became evident that the position of the disc within the intervertebral space may vary to a certain degree, a phenomenon not to be mistaken for disc protrusion.

Adolescent↗
PubMed1983

[Angiographic diagnosis of vascular impotence].

Twelve patients (average age 40 +/- 15 years) with impotentia coeundi were angiographically examined under suspicion of a vasculogenic impotence. Overview angiographies of the pelvis and selective iliaca interna injections were performed. The normal anatomy of the pudendal artery and the penile branches is shown. Ten patients were suffering from a stenosis or total occlusion of the dorsal pudendal artery, the dorsal penile artery or the profound penile artery with or without filling of a peripheral segment. The role of arteriography in surgical treatment is discussed.

Adult↗
PubMed1983

[Intravenous digital subtraction angiography (DSA). Experience in 600 cases].

Intravenous digital subtraction angiography has been employed to examine arteries in 600 patients. Conventional angiography was used in 41 cases where insufficient DSA was made, or as definitive preoperative investigation. In 88% the digital subtraction angiogram is diagnostic, and conventional angiography then shows little more additional information.

Angiography↗
PubMed1983

[Value of intravenous digital subtraction angiography (DSA) for the assessment of surgical blood vessel reconstruction].

Intravenous digital subtraction angiography (DSA) was obtained in 55 cases after reconstructive procedures of the carotid arteries, the pelvic and lower limb arteries. In 48 cases (87%) the studies were of technically satisfactory or good quality. On DSA 32 vascular reconstructions were normal and 16 had typical complications like occlusions, stenoses, aneurysms and insufficient run-off. -Experience indicates that the spatial resolution of DSA is adequate for clinical purposes such as determining graft patency or the presence of postoperative complications. Because DSA is less invasive than catheter angiography, postoperative evaluation of patients having undergone peripheral surgical revascularization should start with DSA.

Aged↗
PubMed1983

[Trauma-induced thrombosis of the inferior vena cava].

A 25 year old foreign patient, in his native country had a blunt polytrauma of the abdomen and of the thigh. The consequence was a complete thrombosis of the vena cava inferior in a distal position to the junction with the liver veins. The diagnosis was realized with phlebography, angiography and computertomography. The diaphragmatic part of the vena cava inferior and the liver veins were not affected by the thrombosis. The increasing edemas of the shank and a stasis ulcer which were the reason for the patients admission to the hospital could be treated successfully by Furosemid and Phenprocoumon within a period of 4 weeks.

Abdominal Injuries↗
PubMed1982

[Diagnosis of aortic aneurysm: new considerations (author's transl)].

Computed tomography was employed in 37 patients suspected of having an aortic aneurysm: it was demonstrated in 32. Additional angiography was performed in 13, in eight of whom thoracic or thoracic-abdominal aneurysm was diagnosed, in five with dissection. Computed tomography gave a more exact measure of length and width of the aneurysm than angiography. The renal arteries were involved in four instances, pelvic arteries in seven. Both arteriography and computed tomography demonstrated dissection of the thoracic aneurysm.

Adult↗
PubMed1982

[Dynamic computer tomographic for tumours of the facial skeleton (author's transl)].

Serial computer tomography after intravenous bolus injection of contrast provides information concerning the vascularity of tumours in the facial skeleton. In addition the relationship of the tumour to the major vessels and their displacement or compression can be demonstrated. This provides information additional to the ordinary computer tomogram, so that neoplasms of the facial skeleton can be shown at various stages and their extent determined. A requirement for the use of serial CT is a scanner with a short scan time and scan interval.

Angiography↗
PubMed1982

[Changes in the pattern of pulmonary vessels shown on x-ray film (author's transl].

The pattern of the pulmonary vessels seen on plain film of the thorax depends on the perfusion of the lungs which depends on the respiratory condition, position in which the x-ray film is taken, and various pathological processes. Pathological findings become evident as localised or generalised increase or decrease in the marking of the vessels, sharpness of outline and pattern of distribution being further assessment criteria. Early analysis of these changes is an important diagnostic step to identify the beginning of pulmonary-venous or pulmonary-arterial pressure increase.

Blood Pressure↗
PubMed1980

[A new method for measuring rotation of a vertebral scoliosis (author's transl)].

A new radiologic method for measuring the rotation of a scoliosis from CT pictures is described. Normal deviation from the 0 position at the level of the first lumbar vertebra in 50 patients without clinically demonstrable scoliosis when accurately positioned, was M = 0.06 degrees +/- 2.95 SD. Direct measurements of the rotation of the spine and of the displacement of the sternum permit serial observation of the progress of the scoliosis and of the consequent thoracic deformity, as well as the result of treatment.

Arthrography↗
PubMed1979

[Demineralisation of bone in chronic arterial insufficiency (author's transl)].

125I-nuclide-absorption measurement demonstrated a statistically significant decrease in mineral content of the calcaneus in 44 patients with arteriographically proven arterial occlusive disease of the lower limbs. The loss of mineral content was dependent on the clinical degree of the vascular disorder (stages according to Fontaine's classification) and the site of the arterial occlusion. There was no demonstrable relationship between the degree of demineralisation and the duration of the vascular disorder. If treatment proved successful there was a significant rise in the mineral content of the calcaneus.

Aged↗
PubMed1979

[Quantitative mineral estimations in vertebral bodies by computer tomography (author's transl)].

The accuracy of computer tomographic bone density measurements in the axial skeleton was tested by comparing results obtained from the first lumbar body in abdominal phantoms. An almost linear relationship (r = 0.998) was found between increasing concentrations of a calcium chloride solution and CT absorption values. The sum of the CT values of sections through the vertebral body correlated well with their ash content (r = 0.90) as well as with the hydroxyl apatite values obtained by I125-absorption densitometry (r = 0.88). Reproducibility of CT measurements on the phantom was good (coefficient of variation = 1.2% in the spongiosa). Average CT values of separate measurements of the spongiosa and cortex could be correlated with the total spongiosa by a special programme (r = 0.95). In the practical application of this technique, possible sources of error must be considered, such as the effect of high energy polychromatic radiation, inhomogeneity of the object being investigated and difficulties in positioning the patients

Absorptiometry, Photon↗
PubMed1979

[Analysis and differential diagnosis of gastric impressions (author's transl)].

Based on the vector principle conceived by Whalen pertaining to the spreading of intra abdominal space occupying lesions, the attempt was made to analyse impression effects of the gastric wall and to demonstrate their relevance for differential diagnosis. An examination technique (hypotensive double contrast technique), suitable for adequate assessment, applicable also to minor alterations, is being described.

Abdominal Neoplasms↗