Publications by authors named "Breuel H"

Purpose: Acute kidney injury during systemic infections is common; however, renal outcome is poorly investigated. The increase of multiresistant pathogens leads to the use of potential nephrotoxic antibiotics as vancomycin. We investigated the impact of vancomycin and renal replacement therapy (RRT) for renal recovery during sepsis.

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Sepsis and its sequelae of multiple organ failure is one of the leading causes of death in the industrial countries. Several studies have shown that patients who are treated with low-dose acetyl salicylic acid (ASA) for secondary prevention of atherothrombosis may have a lower risk to develop organ failure in the case of critical illness. The benefit of ASA is probably due to an inhibition of platelet activation as well as an increase in the formation of anti-inflammatory lipoxin A4.

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Aim: Renal function is usually determined by means of creatinine-clearance, and of serum Cystatin C, the latter with increasing frequency. The present study analyses, whether the diagnostic accuracy of (99m)Tc-MAG(3) clearance is comparable to that of these modern serologic methods.

Patients, Methods: 71 consecutive adult Caucasian patients (42 female, 29 male; age 50 +/- 16 yrs.

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Single and multiple dose pharmacokinetics and absolute bioavailability of the calcium antagonist nimodipine (Nimotop) were investigated in 24 young (age: 22 - 40 years) and 24 elderly (age: 59 - 79 years) healthy subjects. There were no significant changes in blood pressure, heart rate, and ECG-parameters in both age groups, and no increase in frequency of adverse events was observed in the elderly. Following a single intravenous infusion of 15 micrograms/kg for 1 hour, there were no significant differences in nimodipine pharmacokinetics between young and elderly volunteers.

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A new method for the determination of furosemide (CAS 54-31-9) in plasma and urine by gas chromatography/mass spectrometry (GC/MS) has been developed. After acidification the samples were extracted by ethyl acetate and methylated by methyl iodide. The chromatography was carried out on a fused-silica capillary column with SE-54 stationary phase.

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The pharmacokinetics of reboxetine, a new antidepressant agent, were found to be close to linear in a crossover study comparing administration of single 2, 3, 4, and 5 mg capsule doses in 15 healthy male volunteers, and in the same study the capsules were bioequivalent to the proposed therapeutic tablet formulation (4 mg). Kinetic analysis was based on HPLC assay of reboxetine in plasma and urine collected up to 72 h after each administration. Plasma levels indicated a rapid absorption (tmax approximately equal to 2 h) and an elimination half-life of about 13 h.

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Pharmacokinetic interactions following coadministration of fluoxetine and lithium were investigated in 10 young healthy subjects. Both drugs were administered orally in a non-blinded design with 3 consecutive treatment periods: single oral dose of lithium (32.4 mmol lithium as acetate, Quilonum; coadministration of single oral doses of lithium (32.

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The possible influence of chronic indometacin (CAS 53-86-1) medication on nimodipine (CAS 66085-59-4) pharmacokinetics was investigated in 24 elderly healthy subjects. Both drugs were orally administered in a non-blinded, randomized, twofold crossover design. The study periods with a 5-day treatment each were separated by a 2-week washout period.

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Possible interactions between the calcium channel blocker nimodipine and the hypoglycemic sulphonylurea glibenclamide were investigated in patients with type-2 diabetes mellitus. These 11 patients had taken their individually adjusted antidiabetic treatment unchanged for at least 3 months and showed a satisfactory stabilization on their disease. The concomitant administration of nimodipine 30 mg t.

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Possible drug interactions between the two calcium channel blockers nimodipine and nifedipine were investigated in 12 elderly patients with stable mild to moderate hypertension. Their individually adjusted nifedipine treatment had been unchanged for at least 5 weeks. There was no evidence of significant changes in nifedipine efficacy as seen from blood pressure and heart rate after a 7-day comedication of 30 mg nimodipine t.

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1. Nimodipine (30 mg three times daily) and diazepam (10 mg once daily), were given orally to 24 elderly healthy subjects in a randomized, non-blinded, threefold-crossover study. Each of the three treatment periods lasted 5 days separated by 2 week washout phases.

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A randomized phase-I study was performed in a clinical setting in 24 healthy young male subjects, aged 20 to 35 years, to investigate the influence of Ubretid on AChE inhibition following oral and i.m. administration in one of three medication schemes: -single oral (10 mg) and i.

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The safety and tolerance of increasing single oral doses of 20, 40, 80, 120, 180, 240 and 360 mg trospium chloride (Spasmo-lyt, CAS 10405-0204) were investigated in 29 healthy male volunteers in a double-blind placebo-controlled study. Blood pressure, heart rate, ECG, pupillary diameter, salivary secretion, and subjective reports of tolerance revealed no essential differences between placebo and trospium chloride in doses up to 120 mg. Starting with single doses of 180 mg, anticholinergic effects were observed with increasing intensity, i.

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Pharmacokinetics and relative bioavailability of the marketed prajmalium bitartrate tablet (Neo-Gilurytmal, CAS 2589-47-1) compared to an oral solution were investigated in an open, randomized, single-dose two-fold crossover study in 20 healthy male volunteers. One subject was identified to be a poor metabolizer. In the study population with normal metabolic status the two oral formulations proved to be bioequivalent with regard to the pharmacokinetic parameters Cmax, AUC(0-Tlast), AUC(0-infinity) and Ae(24h).

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Potentiation of the pressor effect of tyramine (TYR) by intravenous (i.v.) injection during moclobemide treatment was investigated in healthy volunteers and in depressed patients.

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In an open randomized cross-over study involving a total of 12 healthy male subjects (mean age: 29 years), the pharmacokinetic profile of Pulmo-Timelets was compared with that of a theophylline controlled-release tablet (each administered at a dose of 600 mg theophylline in the controlled-release form) in the steady state after saturation with a single evening application over 4 days. The relative bioavailability of Pulmo-Timelets vis-a-vis the reference preparation referred to the area under the curve (AUC) in the 24-hour dosage interval, revealed a figure of 82%. Here, the reduced AUC manifested in particular in the absence of concentration peaks associated with a tendency towards somewhat higher plasma concentration 24 hours after administration.

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Gated Blood Pool Scintigraphy (GBPS), i.e. the noninvasive evaluation of ventricular performance following the administration of radionuclides as intravascular tracers has had a major impact on many aspects of cardiology and has proven its clinical value and reliability in the past years.

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In 58 patients suffering from either stenosis or insufficiency of a single heart valve, gated blood pool scintigraphy was performed to determine the ejection fraction as well as the peak filling and peak ejection rates. It could be demonstrated that in patients with valvular disorders the ejection fraction was only moderately decreased, generally remaining in the lower reference range. The peak filling and ejection rates showed no pathologic changes with the exception of patients with aortic regurgitation where these rates were significantly decreased.

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The bioavailability of orally administered sodium 2-mercaptoethane sulfonate (mesna, Uromitexan drink ampoules) was tested in 18 healthy probands and in 5 tumor patients. Following single oral administration of 20 or 40 mg/kg mesna, 52.4% and 52.

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A new non-invasive clinical pharmacological model, developed at the Institut für Klinische Pharmakologie, Bobenheim (FR Germany), is reported. The principle of the model is the photographic determination of the diameter of the pupilla before and after administration of drugs active at the pupillar muscle. The area of the pupilla as a parameter of drug effect can be proceeded mathematically.

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A new non-invasive clinical pharmacological model, developed at out Institut, is reported. The principle of the model is the photographic determination of the diameter of the pupil before and after administration of drugs active at the pupilr muscle. The area of the pupilla as a parameter of drug effect can be predicted mathematically.

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Radio-active plastic microspheres with an average diameter of 15 mu were used in eight dogs to measure renal perfusion and the results compared with time-activity curves before and after constriction of the left renal artery. It was shown that the values obtained for renal blood flow by functional scintigraphy are not accurate, particularly for moderate or low blood flow. The reason for this is primarily the distortion of the intravenously injected radio-active bolus and the consequent deviation from the so-called delta function.

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Although equilibrium gated blood pool scintigraphy has become a topic of utmost interest during the last few years, there are still considerable variations in the sequential scintigraphic methods used by different groups. In view of the fact that there seems to be a lack of detailed knowledge of the various available techniques of data acquisition, the respective methods are collated in order to consider their advantages and disadvantages. From this, the most commendable technique for the scintigraphic evaluation of left ventricular function is derived.

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