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Biomedical subjects

H D Weiss

Publications and source records attributed to H D Weiss.

At least 73 records · Page 4Linked to original sources
PubMed1986

[Risk of tuberculosis infection among hospital personnel].

The decrease in morbidity due to tuberculosis and the increasing number on non-infected persons strongly suggest a review of the conventional tuberculosis monitoring procedures in hospital staff. A study at Luebeck university on the risk of tuberculosis infection among medical personnel showed that tuberculin tests in non-infected persons and chest x-rays only if exposed to patients in the infectious stage of tuberculosis will suffice and comply with the Federal regulations governing health protection of medical and paramedical staff.

Germany, West↗
PubMed1986

Cardiac gating in intravenous DSA.

ECG-gating of a pulsed radiation exposure during end-diastole using digital subtraction angiography shows significantly better results in the examination of the aortic arch vessels and pulmonary arteries and may be expected to decrease the rate of false positive diagnosis of stenosis when examining renal arteries. Different types of misregistration artifacts due to a smear effect by integrating several television frames using non-gated DSA are described and schematically explained. Furthermore, a short description of the difficulties which may be encountered with ecg-gated DSA--mainly rapid changes of heart frequency--is given.

Angiography↗
PubMed1986

Utility of DSA in the evaluation of haemodialysis access fistulas.

Results of 39 intravenous and intraarterial DSA studies of haemodialysis access fistula are presented. Advantages of DSA versus conventional fistulography and xeroangiography are discussed. Digital subtraction angiography represents an accurate, time-saving and low complication approach to the evaluation of failing dialysis access fistulas.

Adult↗
PubMed1985

[Comparison of Doppler ultrasound, intravenous DSA and conventional film angiography in diagnosing stenosing changes in the area of the carotid bifurcation].

The findings on Doppler ultrasound, intravenous DSA and conventional film angiography were compared in 66 examinations of the carotids with regard to their specificity, sensitivity and accuracy. Comparisons with the literature show that intravenous DSA equals Doppler ultrasound only if good or excellent results of the latter are considered. If poorer DSA results are included, diagnostic precision of this method is 5 to 10% less than that of Doppler ultrasound. Mural ulceration can be diagnosed by means of intravenous DSA in only about 50% of cases, whereas Doppler ultrasound is unable to diagnose this. Improved image quality of intravenous DSA, with better diagnostic precision, could be achieved by using ECG gating.

Aged↗
PubMed1985

[Intravenous DSA following kidney transplantation].

Intravenous DSA is a simple angiographic technique in the follow-up of patients with renal transplants. It is of value in the post-operative anuric phase, for investigating renal function which is deteriorating and for demonstrating, or excluding, stenosis of the renal artery at the anastomosis during the development of hypertension. Changes in the peripheral arteries are not usually demonstrable. Reduced opacification of the parenchyma is observed during rejection and if there has been damage to the transplant, but is not seen if the transplant is functioning normally.

Adult↗
PubMed1985

Sarcoidal granulomas in tattoos.

A case of sarcoidal granuloma in tattoos, occurring in the setting of systemic sarcoidosis, is presented. The differential diagnosis of granulomatous reactions in tattoos is reported.

Adult↗
PubMed1984

[The so-called inflammatory aneurysm of the abdominal aorta].

The computer tomographic appearances of four patients with the rare inflammatory aneurysm of the abdominal aorta are described. The condition, whose aetiology is not known, affects mostly men in the fifth, sixth and seventh decade. Computed tomography shows, in addition to the typical changes due to an aortic aneurysm, horse-shoe shaped, circular, homogeneous peri-aneurysmal masses, which enhance after intravenous contrast. Bolus injection of contrast is necessary in order to differentiate these from a dissection or retroperitoneal lymphoma. Distinction between these conditions is possible as a result of the various types of enhancement which occur in the aortic lumen, in fibrosis and in lymphoma.

Aged↗
PubMed1984

[Intra-arterial digital subtraction angiography of the femoral bifurcation as a supplement to conventional pelvic-leg arteriography].

In view of the fact that in prognosis and treatment of arterial occlusion, particular importance must be attached to the profunda femoris artery, and especially to the region of origin of this artery, it is imperative to achieve angiographic representation of the descent of the profunda femoris artery without any masking. The intra-arterial injection method employing digital subtraction angiography is the method of choice, since it requires a low amount of contrast agent, time, and film. In 90 per cent of the cases, ipsilateral anterior oblique projection will be most suitable to represent the femoral bifurcation, which depends on the course of the profunda femoris artery in anterior-posterior projection, the angle varying between 30 degrees 40 degrees. 50 to 70 per cent of the stenoses occurring in the descending part of the profunda femoris artery, can be recognised via oblique projection only.

Adult↗
PubMed1982

Solitary intracranial plasmacytoma: two patients with extended follow-up.

Solitary neoplastic proliferation of plasma cells (plasmacytoma) rarely occurs in the central nervous system. The longest follow-Up in nine previously reported patients was 5 years. We have followed two patients with solitary intracranial plasmacytoma for 8 and 13 years, respectively. At the time of biopsy diagnosis, neither showed involvement of the adjacent calvarium or evidence of a systemic plasma cell dyscrasia. The first patient underwent partial excision of a mass in the right occipital lobe that showed no gross or microscopic involvement of the dura. The second patient had partial resection of a mass arising from dura and invading the left temporal lobe. Postoperative irradiation was given to both patients. No clinical or radiological sign of recurrent brain tumor has developed in either patient during the extended follow-up period. Neither patient has had laboratory or clinical evidence of a systemic plasma cell dyscrasia. Solitary intracranial plasmacytoma may be a "curable" brain tumor.

Adult↗
PubMed1981

[Accuracy of endoscopic retrograde pancreatico-cholangiography in the diagnosis of pancreatic disease: an analysis of three thousand investigations (author's transl)].

Endoscopic retrograde pancreatico-cholangiography (ERPC) gave the correct diagnosis in 83% of 269 cases of pancreatitis confirmed by operation, clinical features, laboratory findings and course. It provided the correct diagnosis in 85% of 82 cases of necrosis of the pancreas and pseudocysts confirmed at operation. ERPC is one of the most important methods of investigation in papillary stenosis, because it can demonstrate both ducts and can reveal functional changes, especially delayed emptying. The correct diagnosis of carcinoma of the pancreas, confirmed at operation or histologically, was made in 88% of 107 cases. Endoscopy correctly diagnosed 26 of 27 cases of papillary carcinoma. Biopsy with subsequent histological study and cytological analysis of pancreatic secretion further served to confirm the diagnoses established by ERPC.

Ampulla of Vater↗
PubMed1981

Evoked responses in vitamin B12 deficiency.

Abnormalities of visual, brainstem auditory, and somatosensory evoked responses were demonstrated in two of seven individuals with vitamin B12 deficiency. The evoked response delays correlated directly with the degree of neurological dysfunction. Abnormalities were present in sensory systems without clinical evidence of involvement and were similar to those found in individuals with multiple sclerosis.

Adult↗
PubMed1981

[A comparison of the diagnostic accuracy of ultrasound, computer tomography and ERPC in chronic pancreatitis and carcinoma of the pancreas (author's transl)].

A comparison of the diagnostic accuracy of ultrasound, computer tomography and ERPC in chronic or recurrent pancreatitis and pancreatic carcinoma has shown that ERPC is the most precise of the three methods. This was particularly important in the demonstration of the small, still operable, carcinomas of the pancreas. Sonography is most useful for serial observations of pancreatic pseudocysts due to chronic recurrent pancreatitis. In this situation, ERPC should only be used if sonography and computer tomography cannot localise the lesion. Where the computer tomogram has shown evidence of enlargement of the pancreas, sonography may show an area devoid of echos within the enlarged organ, suggesting the presence of a carcinoma. Computer tomography superior to ultrasonography in delineating the extent of extensive pancreatic disease and in showing the anatomical structures surrounding the pancreas.

Adult↗
PubMed1981

Tumours in the region of the papilla of Vater. Diagnosis via endoscopy, biopsy, brush cytology, ERPC and CT-scan.

Thirty-two cases of tumour in the region of papilla of Vater are reported including five benign lesions (papillitis, polyp, duodenitis) and 27 periampullary carcinomas. Duodenoscopy has a key position in the diagnosis of these lesions, since by judging the endoscopic appearance of the papilla a forceps biopsy and brush cytology can be performed. Accuracy of forceps biopsy is up to 66%, whereas diagnostic accuracy of brush cytology only reaches about 44%. Because of the possible false positive results, brush cytology should be regarded with reserve in the diagnosis of periampullary carcinomas. Retrograde filling of contrast medium of bile and/or pancreatic ducts mainly serves for delineation of tumour size and allows fine needle aspiration under fluoroscopy. Success rate of retrograde cannulation is rather low. CT-scans are of great importance in detecting metastases of liver and/or regional lymphnodes but are of little value in diagnosing the primary lesion.

Ampulla of Vater↗
PubMed1980

[Percutaneously introduced bile duct prostheses as primary measure in obstructive jaundice (author's transl)].

The simplest measure for overcoming obstructive jaundice, and the one with the least complications, is percutaneous transhepatic bile duct drainage, which we have carried out on 38 patients. We have abandoned the catheter technique with combined external and internal drainage and instead use primary implantation of a bile duct prosthesis by the transhepatic route in cases of obstructive jaundice. The results are better, and the procedure is easier for the patient. Our experience with twelve implants in nine patients is described.

Adult↗