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Biomedical subjects

H Umek

Publications and source records attributed to H Umek.

At least 19 recordsLinked to original sources
PubMed1992

Serum procollagen III peptide levels in subjects with sarcoidosis. A 5-year follow-up study.

In a prospective study, Type III procollagen N-terminal peptide was measured in the sera of 38 subjects with biopsy-proven pulmonary sarcoidosis at 6-month intervals over a period of 5 yr. The subjects were divided into four groups according to their radiologic presentation and clinical course: Group A (n = 10) subjects with sarcoidosis Type I without radiologic progression over 5 yr; Group B (n = 5) subjects with sarcoidosis Type I with radiologic progression to Stage II or III; Group C (n = 9) subjects with sarcoidosis Types II and III without progression over 5 yr; and Group D (n = 14) subjects with sarcoidosis Types II and III with radiologic progression. Lung function tests (FVC, FEV1, and DLCO), chest roentgenograms, and measurements of serum angiotensin converting enzyme (S-ACE) were performed concurrently with the S-PCP-III levels. Significantly higher levels of S-PCP-III were found in group B (Type I, progressive) (18.2 +/- 1.09 ng/ml) and in group D (Type II/III, progressive) (13.9 +/- 1.2 ng/ml) compared with those of Group A (Type I, stable) (9.1 +/- 1.09 ng/ml) and Group C (Type II/III, stable) (7.6 +/- 1.1 ng/ml) or normal volunteers (9.4 +/- 4 ng/ml) (p less than 0.001 for all comparisons). Changes in S-PCP-III levels tended to parallel the clinical course, and steroid treatment resulted in a significant decrease in S-PCP-III concentrations (p less than 0.001). In contrast, serum angiotensin converting enzyme (S-ACE) levels did not correlate with either the clinical course or radiologic changes.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1991

Laser angioplasty: results of a prospective, multicenter study at 3-year follow-up.

A prospective multicenter trial was initiated to evaluate the efficacy and safety of laser angioplasty. Laser recanalization was performed in 338 patients with arteriosclerotic femoropopliteal artery occlusions (average length, 8.5 cm). Neodymium-yttrium-aluminum-garnet lasers were used in combination with sapphire probe catheters. The initial recanalization rate was 85%. Complications were observed in 14% of the patients. Emergency surgery was required in 1.5%. The cumulative long-term patency rate of the successfully recanalized arteries was 80%, 70%, 62%, and 57% at 6 months, 1 year, and 2 and 3 years, respectively. The patency rates were not affected by the length of the occlusion and the long-term medication (platelet inhibition vs anticoagulation), but patients with a normal runoff had significantly better patency rates than those with reduced runoff (63% vs 52%, P less than .01). The study has shown that laser-assisted angioplasty is safe and at least as effective as conventional angioplasty.

Adult↗
PubMed1991

[Clinical and urodynamic results after various ileum neobladder procedures].

Urinary diversion after cystectomy in 15 male patients suffering from advanced transitional cell carcinoma of the bladder (pT-pT3b) was performed by ileal neobladder in different ways: S type n = 5, U type n = 3, J type n = 3 and W type n = 4. The perioperative mortality was nil, the overall complication rate 60%. The patients were followed up by means of regular urodynamic controls after 3, 6 and 12 months. After a median follow up period of 18 months (12-29) the J type and W type seem to be superior with regard to postoperative continence. All patients with W type neobladder are continent. The capacity of the neobladders varies from 200 to 800 ml; the W pouches have the highest capacity.

Aged↗
PubMed1990

[Femoropopliteal laser recanalization--a multicenter study].

Laser-assisted angioplasty was performed in four different hospital centers, following the same treatment protocol and using an Nd-YAG laser with a sapphire-probe catheter. The initial recanalization rate of 259 femoro-popliteal occlusions with a mean length of 7.5 cm was 84%. Dissections or perforations were observed in 10%. An emergency surgical intervention was required in 1.1%. The long-term patency rate of the successfully recanalized arteries was 74% after 2 years. The cumulative cure rate of all 259 patients was 62%.

Adult↗
PubMed1988

[Ultrasound controlled kidney cyst puncture: significance for diagnosis and therapy].

Renal cyst puncture under ultrasonic guidance has proved an excellent and safe method in the differential diagnosis of cystic renal masses. The use of ultrasound in the follow-up of patients with renal cyst puncture is mandatory for evaluation of complications and results. The therapeutic success of renal cyst puncture is poor and estimated at about 25%. New percutaneous techniques with resection of the cystic wall lead us to expect much better results than with open surgical management.

Catheters, Indwelling↗
PubMed1988

[A cerebral air embolism due to a central venous catheter in the computed tomogram].

A case of air embolism to the brain occurred via a disconnected central venous catheter. Computed tomography disclosed a number of small air bubbles in the right hemisphere. If the clinician suspects air embolism a CT scan should be obtained immediately to verify the presence of intracerebral air. On later CT scans only secondary effects like in any embolism will be seen.

Catheterization, Central Venous↗
PubMed1985

Adrenal cortical carcinoma: preoperative demonstration of right atrial extension by sonography and computerized tomography.

We report a case of adrenal cortical carcinoma with tumor thrombus extending to the right atrium. Tumor extension was demonstrated preoperatively with sonography and computerized tomography. We recommend that both modalities be used when evaluating masses in the suprarenal space. The preoperative diagnosis of tumor extension via the adrenal vein into the inferior vena cava was confirmed at operation.

Adrenal Cortex Neoplasms↗
PubMed1984

[Changes in the vena cava in kidney tumors: sonography or cavography?].

In seven out of 45 cases with malignant growths in kidneys and adrenal glands, sonography presented tumor-induced changes in the vena cava. The accuracy of this technique in detecting changes in the vena cava corresponds to that of cavography. Thus, it is no longer necessary to use cavography--except as a supplementary method mainly in cases where with sonography it is difficult to differentiate between an incomplete and a complete occlusion of the vena cava or between a cone-shaped invasion of the neoplastic thrombus into the inferior vena cava and an infiltration of the tumor into the wall of the vena cava.

Adenocarcinoma↗
PubMed1983

[Clinical significance of the dilated common bile duct in the sonogram].

The data of 34 patients with a sonographically established dilated common bile duct were analysed as to the clinical significance of these findings. Whereas it was possible to diagnose dilated proximal common bile ducts in all of the cases under examination, presentation of the distal section succeeded in only 56% of the patients involved. Thus distal concretions escaped diagnosis in seven out of 24 cases. There is no established relation between the extent of dilatation of the common bile duct and hyperbilirubinemia; quite to the contrary, in three cases without any signs of arrest of bile excretion under chemical analysis, it was not until ultrasonography was performed that some initial indications of an impeded bile outflow due to concretions were discovered. It was possible to obtain a confirmed diagnosis in the case of two pancreas carcinomas, three bile duct carcinomas, a local recurrent carcinoma of the gall bladder and lymph node metastases of a gastric carcinoma in the hepaticoduodenal ligament. In another gall bladder carcinoma nothing but dilated bile ducts presented itself. What was thought to be a hepatoma, turned out to be a carcinoma of the bile duct during autopsy. A cirrhotic carcinoma of the common bile duct was considered to be a case of calculi in the common bile duct without shadow when examined with ultrasound. During their stay in the hospital, four patients passed gallstones, thus relieving distention of the duct. Additional tests were carried out in 16 patients (47%) in order to confirm the diagnosis.(ABSTRACT TRUNCATED AT 250 WORDS)

Aged↗
PubMed1978

[Morphological liver diagnosis in radiology].

Based on the experiences incurred in the years 1970 to 1977, this thesis deals with the efficiency of sonography, scintigraphy and angiography as well as such supplementary diagnostic procedures as ERCP, hepatography and computed tomography in circumscribed hepatic processes. Based on the typical clinical findings obtained, recommendations are made on further diagnostic procedures according to the given hospital structure in Austria: 80% of liver metastases and circumscribed space-occupying primary lesions may be diagnosed by sonography in Basic Hospitals (Standardkrankenanstalten) while cystic processes may be excluded. Solitary space-occupying lesions will have to be examined further by scintigraphy and angiography on the next highest level, the General Hospital (Schwerpunktkrankenanstalt). In combined application, diagnostic accuracy increases to 90%. ERCP, hepatography and percutaneous transhepatic cholangiography are used in special clinical cases only. Computed tomography, available in Central Hospitals (University Hospitals), will not replace the other morphological, diagnostic procedures.

Adenoma, Bile Duct↗
PubMed1976

[Bleomycin-induced lung changes in the roentgen picture].

Amongst 25 patients treated with Bleomycin for squamous epitheliomas, irreversible pulmonary fibrosis was observed in four cases and reversible fibrosis in two others. The radiological changes in five patients consisted of linear interstitial shadows and one patient showed nodular shadowing. By means of lung biopsies, these findings were related to the pathological changes. Problems in the differential diagnosis of these radiological findings are discussed.

Aged↗