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Biomedical subjects

G Fricke

Publications and source records attributed to G Fricke.

At least 37 records · Page 2Linked to original sources
PubMed1980

[Pharmacokinetic and clinical studies with sisomicin in paediatrics (author's transl)].

Pharmakokinetic and clinical investigations were carried out with sisomicin, one of the newer aminoglycoside antibiotics, in 40 children aged from seven days to ten years. Serum concentrations were determined in 35 children 1/2, 1, 2, 4 and 6 hours after i. m. injection of 1.0 mg sisomicin/kg body weight. The average peak serum levels were 2.48 mg/l in children under three months and 3.58 mg/l in children between seven months and ten years. Renal elimination in newborns is delayed in comparison to older infants and children; the distribution volume of the central compartment diminishes with increasing age. The effect of these two counteracting tendencies is that renal clearance remains constant in the age groups investigated, however the frequency of drug administration must be adjusted according to age. During an average treatment period of ten days adequate serum concentrations between 3.1 mg/l and 6.2 mg/l one hour after injection could be achieved with dosages adjusted to age and body weight. Clinical results were good: 18 out of 20 children could be cured clinically, and 20 out of 21 isolated infectious agents were eliminated. There were no problems in local and systemic tolerance.

Bacterial Infections↗
PubMed1979

[Enteritis due to Escherichia coli O142 K86 H34 in a ward of premature infants. With a discussion on the problem of pathogenicity of "enteropathogenic serogroups of E. coli" (author's transl)].

E. coli O142 K86 H34 has been isolated from stool specimens of five babies in a ward of premature infants. Diarrheal stools were observed in two of them; one infant temporarily failed to gain weight, and the other developed a temporary loss of weight. Smooth stools observed in the third baby as well as asymptomatic infections in two others did not affect their normal development. The outbreak lasted 15 days; the source of infection and the mode of transmission remained unknown. The pathogenesis and importance of human diarrheal disease caused by E. coli is reviewed. Enteritis of adults and children due to enteroinvasive (EIEC) and enterotoxigenic (ETEC) strains is described. The etiological role of so-called "enteropathogenic E. coli" (EPEC), rejected increasingly during the past decade, has been demonstrated again in recent studies. Routine search for EPEC is suggested in cases of infantile enteritis in hospitals and other institutions.

Cross Infection↗
PubMed1979

[Echocardiographic diagnosis of malfunction of the Björk-Shiley prosthetic heart valve in the mitral position (author's transl)].

In patients with mitral valve replacement an acute cardiac decompensation most often signalizes malfunction of the prosthesis. Echocardiography proves to be of great value in the noninvasive diagnostic to detecting valve dysfunction. The echocardiogram of two patients few weeks after cardiac surgery was strongly suggestive of perivalve leak with severe regurgitation: enlarged left atrium and left ventricle, hyperactive septal motion and hyperkinetic motion of the left ventricular posterior wall, unique "hump" in early diastole with normal excursion, opening and closing velocity of the disc. The echocardiogram of one patient exhibited the pattern of mitral stenosis: large left atrium, decreased amplitude of excursion of the opening of the disc with a slowing and "rounded" opening upstroke as well as a slowed and "rounded" downstroke with prolonged opening and closing rates of the disc. One patient with aortic and mitral valve replacement showed no echocardiographic signs of abnormal disc motion. The reason for the cardiac decompensation was an acute malfunction of the left ventricle. The echocardiographic findings were confirmed by cardiac catheterization, left ventricular cineangiography or direct inspection during open heart surgery.

Adult↗
PubMed1979

[Exercise capacity and physical activity following prosthetic valve replacement in relation to cardiovascular function (author's transl)].

31 patients (Pt) with Mitral Valve Repacement (MVR), 22 Pt with Aortic VR (AVR) and 10 Pt with Double VR (DVR) are investigated hemodynamically and by ergometry. Normal working capacity (100% WC) has been achieved in 59% of Pt with AVR, in 34% with MVR and in 22% with DVR. Pulmonary artery mean pressure (PAMP) in this group was 19.5 mmHg, in a second group with a WC of 80% PAMP was 22.2 mmHG. 77% OF Pt with AVR are working regularly, in MVR 58% and in DVR 50%. In the average of these Pt, 7 months after VR professional occupation is started again. PAMP and pulmonary vascular resistance (APR) is significantly lower in the working vs. the non working group: PAMP 19.8/23.7 mmHg; APR 115/145 dynes sec cm-5, respectively. In MVR, the transprosthetic pressure gradient at rest was 4.1 (working PPT) and 7.5 mmHg (other); in AVR statistically no significant difference in the gradient could be found. In general, 68% of the working Pt are employed in a preferably sedentary job. The mean duration of daily work was estimated to 6.7 hours. It is concluded that AVR yields more favourable results in terms of regaining normal working activity than MVR. Cardiovascular function and physical capability in Pt with DVR are approximately comparable to MVR.

Adult↗
PubMed1978

[Hemodynamic and echocardiographic investigations following mitral valve replacement by glutaraldehyde preserved xenografts (author's transl)].

Sequential hemodynamic and echocardiographic studies following mitral valve replacement by glutaraldehyde preserved bioprotheses have been carried out in 40 patients. These investigations have been compared to those of patients having received Björk-Shiley or Lillehei-Kaster valves. Between the two groups the data of heart catheterization showed no differences. Echocardiography however showed an earlier normalisation of the data of the left ventricle after replacement by Hancock valves. Therefore and because of low thromboembolic risc and good mechanical stability and low immunogenecity the use of bioprotheses is recommended.

Aortic Valve↗
PubMed1977

[Supravalvular aortic stenosis: Congenital and acquired changes in the ascending aorta near the valve (author's transl)].

Three patients with supravalvular aortic stenosis are described. One was a typical, sporadic-type supravalvular aortic stenosis, another a predominant aortic valve stenosis as part a complex heart lesion and the third inflammatory shrinking of the anulus fibrosus with an inflammatory aortic valve stenosis. The means of diagnosis are discussed. Angiocardiography and aortography are essential in order to demonstrate the pathology, haemodynamics, relation to the coronary arteries and the sinus of Valsalva, and in order to show other abnormalities. The aetiology and pathogenesis of various types of supravalvular aortic stenosis are discussed.

Adult↗
PubMed1975

[Activation of the fibrinolytic system by furosemide (author's transl)].

Intravenously administered furosemide induces besides its well known diuretic effect a significant activation of the fibrinolytic system. This fibrinolytic effect, however, is only seen in persons with an intact renal system, not in nephrectomized patients and not in patients with chronic renal insufficiency. From this finding the conclusion is drawn that furosemide needs for its fibrinolytic effect the intact renal tissue. It is discussed that the beneficial therapeutic value of high-dose furosemide in acute renal insufficiency following shock or septic abortion might at least partially be due to furosemide-induced fibrinolysis of the microthrombi of the glomerula.

Abortion, Septic↗
PubMed1975

[Regional pulmonary blood flow and its regulation in patients with obstructive lung disease (author's transl)].

Regional blood flow was measured in 47 patients with obstructive lung disease, using iso-intensity zone scanning after injection of 131I macro-aggregates in the supine (27 subjects) or sitting (20 subjects) position. In most of the patients there was a shift of pulmonary blood flow to the upper lung fields. The shift was related to pulmonary artery pressure and pulmonary arteriolar resistance.

Aged↗