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Biomedical subjects

W Ponhold

Publications and source records attributed to W Ponhold.

67 records · Page 4Linked to original sources
PubMed1980

[Sonography in the Diagnosis of Intrahepatic Cholangiectasis (author's transl)].

The sonographic pattern of signs associated with cholangiectasis is analysed in 25 patients. The extent of dilatation of the bile ducts correlates with the bilirubin level and the duration of the disease. Discrepancies occur in fibrose processes in the biliary tract region and in localised cholangiectases. Sonography is a basic radiologic examination method if there is any suspicion of obstruction to flow in the biliary tract. Findings obtained via sonography are the starting-point of further examinations.

Adult↗
PubMed1980

[Partial cirrhosis of the kidney after radiotherapy of a colon carcinoma. Case record (author's transl)].

The radiological symptoms of excretion urography and angiography of a partial radiogenic cirrhosis of the kidney is discussed on the basis of a case of operated colon carcinoma with subsequent curative radiotherapy because of malignant infiltrations into the adjacent adipose tissue. Furthermore, a relationship between radiological morphology and pathophysiology of the chronic radionephritis is established.

Angiography↗
PubMed1980

[Differential sonographic diagnosis of retroperitoneal tumors].

Presentation of the sonographic findings of 170 retroperitoneal masses: primary and metastatic neoplasms, abdominal aortic aneurysms, hematomas and abszesses. A typical diagnostically reliable sonographic pattern was seen only in retroperitoneal hematomas in the area of the psoas and in aortic aneurysms, provided the aorta itself could be visualized. In all the other masses the ultrasound pattern did not provide reliable clues as to their histology; ultrasound, however, proved to be highly successful in demonstrating the presence and location of the lesion.

Abscess↗
PubMed1979

[The angiographic diagnosis and differential diagnosis of inflammatory disease of bones and soft tissues (a report concerning 40 cases) (author's transl)].

The angiographic appearances of inflammatory disease of bones and soft tissues was analysed in 40 patients. The angiographic findings in inflammation of bone (28 patients) differed greatly, from normal findings (14.2%), moderate angiographic changes corresponding to the severity of the inflammatory process (32.1%), marked changes in the arterial, capillary and venous beds (42.9%) and significant local staining with little peripheral reaction (10.7%). Soft tissue inflammation on the other hand showed increased vascularity in all cases. A typical angiogram was found in 50% of cases and shows the following characteristics: vascularity as compared with the surroundings is usually increased and may be extensive, far more so than is found surrounding vascular bone foci; the contrast staining is usually ill-defined and the veins in the late phase are increased in calibre. Early venous filling is common and should not be regarded as a sign of malignancy. In 17.5% of patients the angiogram simulated a tumour; in four patients (10%) a false positive diagnosis of tumour was made, in two (5%) a tumour could not be excluded and in one case a benign tumour was diagnosed because of localised staining. None of the angiograms which had been interpreted incorrectly showed typical pathological vessels, which are the most important tumour criteria.

Adolescent↗
PubMed1979

[Acute left decompensation--significance of thoracic bed roentgenography for assessing pulmonary venous pressure (author's transl)].

25 thoracic bed x-ray films from 20 intensive-care patients were classified roentgenologically according to three degrees of severity of left decompensation, and compared with the end-diastolic pulmonary arterial pressure. Very good correlation was seen in 60% of the cases and a satisfactory agreement in 30%, whereas a discrepancy compared with haemodynamic parameters was observed in about 10% of the patients. Possibilities of explaining discrepancies are discussed within the framework of error analysis.

Blood Pressure↗
PubMed1978

[Sonography in traumatic rupture of the gallbladder and liver: a case report (author's transl)].

The practicability of using ultrasonography in the evaluation of traumatic rupture of the gallbladder and liver is demonstrated on the basis of a case report. The presence of a subphrenic fluid collection was detected by means of this procedure and the increase in fluid was accurately determined by regular follow-up control examinations. This report eventually led to successful operation. Sonographic postoperative follow-up control examinations showed extensive perihepatic scars in the subdiaphragmatic region.

Accidents, Traffic↗
PubMed1978

[The diagnostic scope of ultrasonography in renal pathology (author's transl)].

The accuracy of ultrasonography in the diagnosis of different pathological renal conditions is evaluated. Correlations were established to the findings on intravenous urography and selective angiography. Ultrasonography is suitable for the determination of the exact size and site of the kidney and, therefore, should be used routinely in the follow-up of renal transplant recipients. The ability to differentiate between solid and cystic lesions is of partcular value. Moreover, perirenal changes are easily recognizable. The limits of B-mode sonography lie in the interpretation of central expanding lesions with a diameter of under 3 cm. This non-invasive method should be used selectively in the diagnosis of renal disease, whereas angiography should be limited to the classification of equivocal ultrasound findings and in the case of solid tumours.

Adenoma↗
PubMed1978

[Ultrasound in gall bladder diagnosis (author's transl)].

An analysis of the ultrasound findings in 104 selected patients with suspected gall bladder disease showed a high accuracy of 92%. Limiting factors in the use of ultrasound are anatomical variations, high position of the gall bladder, which prevents demonstration of the gall bladder. The primary use of ultrasound is in the demonstration of radiologically invisible gall bladders. In our clinical material 58% had stones, with occlusion of the cystic duct as a cause, in 29% there was malignant disease in the porta hepatis, with evidence of bile obstruction amongst those patients in whom there was no radiological opacification of the gall bladder.

Adult↗
PubMed1978

[Sonography for clarify complications after renal transplantation (author's transl)].

The diagnostic value of the ultrasound method was studied via 170 individual examinations in 75 patients. The method is particularly well suited for an accurate determination of the location and size of the transplanted kidney and for demonstrating perirenal growing and displacing processes such as cystic lymphangiomas, haematomas and abscesses. In addition, ultrasound supplies information on the area covered by lacunae. However, the use of the method for diagnosing casting-off reactions is limited on account of the great variability of the dimensional parameters. It can be used without risk in followup studies of patients with transplanted kidneys, since it is a non-invasive method. It deserves preference among the possible methods of investigation, especially when growing and displacing processes have to be identified.

Abscess↗
PubMed1977

[Differential diagnosis of space-occupying lesions of kidneys (comparison between IVP, angiography and ultra-sound) (author's transl)].

On 77 IVP's it can be shown that correct assessment of the identity of space-occupying lesions of the kidneys is difficult (correct diagnosis in 39% of cystic and 10% of solid conditions). Improvement can be expected from early tomography of IVP's by improved pictures of the parenchyma, mainly with ultra-sound which separates cystic from solid conditions. Correlation of these techniques appears sufficient for cystic processes. Angiography is indicated for solid tumors and doubtful ultra-sound findings.

Adenocarcinoma↗
PubMed1977

[The Löfgren syndrome: acute sarcoidosis (author's transl)].

Report on 3 cases of acute sarcoidosis, the Löfgren syndrome. 3 signs: skin changes like erythema nodosum, widening of the hilus due to enlarged lymphglands and arthralgias. Diagnostically this has to be separated from maligant systemic disease and deserves, therefore, the special interest of the radiologist.

Acute Disease↗
PubMedDate not supplied

[Phosphate depletion syndrome in prematures fed human milk].

The reason for our present study on calcium and phosphorus intake of 7 prematures (birthweight 1150-1620 g; 29-34 GW; 1000 IU Vit. D per day) with pooled human milk and on their parameters of calcium, phosphorus- and bone metabolism were reports of rickets in prematures despite sufficient Vit. D substitution. The daily calcium- and phosphorus intake with pooled human milk was considerably lower than intrauterine calcium-and phosphorus accretion of fetuses of comparable gestational age. Biochemical parameters from serum and urine clearly indicated a phosphate deficiency syndrome. We found a significantly positive correlation between the activity of alkaline phosphatase in serum and postconceptional age. Although no subject showed clinical or radiological signs of rickets, in 6 of them the activity of alkaline phosphatase was clearly above normal in the 39th or 40th postconceptional week. We conclude that pooled human milk cannot supply prematures with sufficient amounts of calcium and phosphorus.

Alkaline Phosphatase↗