[Monochromatic aberration in accommodation. Dynamic wavefront analysis].

Background: Monochromatic aberrations may influence the visual acuity of the eye. They are not stable and can be affected by different factors. The subject of the following paper is the dynamic investigation of the changes in wavefront aberration with accommodation.

SEMG activation patterns of thigh muscles during upright standing in haemophilic patients.

Although electromyography (EMG) is a common method to evaluate muscle activity, studies utilizing EMG in haemophilic patients are rare. The haemophilic arthropathy, resulting in altered afferent information is expected to cause disturbed activation and inter-muscular coordination patterns in haemophilic subjects. The aim of this study was to determine differences of selected knee muscles between haemophilic patients and non-haemophilic subjects during upright standing.

[The influence of eye movements on monochromatic wavefront aberrations].

Background: Wavefront-guided corneal surgery is a standard therapeutic option for correcting refractive errors. If the wavefront measured preoperatively is influenced by an incorrect alignment of the bulb, the ablation profile could be distorted and the quality of vision reduced.

Method: Wavefront analysis was done on 49 eyes, examining the primary gaze of the bulb as well as abduction, adduction, elevation, and depression.

Multiple test procedures using an upper bound of the number of true hypotheses and their use for evaluating high-dimensional EEG data.

Frequency analyses of EEG data yield large data sets, which are high-dimensional and have to be evaluated statistically without a large number of false positive statements. There exist several methods to deal with this problem in multiple comparisons. Knowing the number of true hypotheses increases the power of some multiple test procedures, however the number of true hypotheses is unknown, in general, and must be estimated.

Cysteinyl leukotriene 2 receptor and protease-activated receptor 1 activate strongly correlated early genes in human endothelial cells.

Cysteinyl leukotrienes (cysLT), i.e., LTC4, LTD4, and LTE4, are lipid mediators derived from the 5-lipoxygenase pathway, and the cysLT receptors cysLT1-R/cysLT2-R mediate inflammatory tissue reactions.

The lamina adventitia is the major site of immune cell accumulation in standard chow-fed apolipoprotein E-deficient mice.

Objective: Cells of adaptive immunity have been implicated in atherogenesis. Though substantial information is available on immune cells in atherosclerotic lesions of the lamina intima, cells in the lamina adventitia have received less attention.

Methods And Results: The composition of immune cells in the innominate artery and abdominal aorta was examined in young, adult, and old apolipoprotein (apo) E(-/-) and wild-type mice on standard mouse chow.

Trough levels of mycophenolic acid and its glucuronidated metabolite in renal transplant recipients.

Objective: The prophylactic use of the immunosuppressant prodrug, mycophenolate mofetil (MMF) to prevent graft rejection in renal transplant patients is continuing to increase. We measured trough levels of the active metabolite, mycophenolic acid (MPA) and its inactive glucuronide (MPAG) in renal recipients with the aim of characterizing individual variability and of ascertaining factors influencing trough levels, in particular the effect of differences in renal function and the effect of drugs given concurrently.

Methods: Laboratory and clinical data obtained in 35 renal recipients treated with triple therapy (MMF, cyclosporin A (CsA), steroids) were included in this retrospective study.

Comparison of minimally invasive closed circuit extracorporeal circulation with conventional cardiopulmonary bypass and with off-pump technique in CABG patients: selected parameters of coagulation and inflammatory system.

Objective: Closed circuit extracorporeal circulation (CCECC) has been developed to reduce deleterious effects of standard cardiopulmonary bypass (CPB). This study compares the effects of CCECC (CORx system), CPB, and off-pump coronary artery bypass grafting (OPCAB) on red blood cell damage, coagulation activation, fibrinolysis and cytokine expression.

Methods: Thirty patients underwent coronary artery bypass grafting (CABG).

Decrease of carotid intima-media thickness in patients at risk to cerebral ischemia after supplementation with folic acid, Vitamins B6 and B12.

Objective: Hyperhomocysteinemia is associated with atherosclerotic risk. Although vitamins can lower homocysteine (Hcy), information about effects on atherosclerosis is scarce.

Methods: We used carotid intima-media thickness (IMT) as an accepted marker of atherosclerotic changes.

New concepts of multiple tests and their use for evaluating high-dimensional EEG data.

Recently, new concepts of type I error control in multiple comparisons have been proposed, in addition to FWE and FDR control. We introduce these criteria and investigate in simulations how the powers of corresponding test procedures for multiple endpoints depend on various quantities such as number and correlation of endpoints, percentage of false hypotheses, etc. We applied the different multiple tests to EEG coherence data.

Evaluation of bone-mineral density by digital X-ray radiogrammetry (DXR) in pediatric renal transplant recipients.

Background: Loss of bone mass and increased fracture risk are known complications after renal transplantation in adults. Risk factors include donor source, dialysis status prior to transplantation, aetiology of renal disease, transplant rejection and drug therapy, particularly steroids.

Objective: In this preliminary study of quantification of bone loss in children after renal transplantion, we evaluated the applicability of digital X-ray radiogrammetry (DXR) of hand radiographs to estimate cortical bone mineral density (DXR-BMD).

Intrauterine growth restriction ameliorates the effects of gradual hemorrhagic hypotension on regional cerebral blood flow and brain oxygen uptake in newborn piglets.

Data are scant regarding the development of cerebrovascular autoregulation in intrauterine growth-restricted (IUGR) newborns. We tested the hypothesis that IUGR improves the ability of neonates to withstand critical periods of gradual hemorrhagic hypotension by optimizing cerebrovascular autoregulation. Studies were conducted on 1-d-old anesthetized piglets divided into groups of normal weight (NW, n = 14, body weight = 1518 +/- 122 g) and IUGR (n = 14, body weight = 829 +/- 50 g) animals.

Chronic ultrastructural effects of temporary intraluminal shunts in a porcine off-pump model.

Background: Temporary intraluminal shunts (TILS) are routinely used in off-pump revascularization to facilitate the anastomosis while maintaining myocardial blood supply. Whereas tourniquet-occlusion can cause vessel wall trauma, potentially adverse chronic effects of TILS on the coronary intima have not been evaluated yet. This chronic large animal study investigated ultrastructural effects of TILS on the vessel wall.

Physiological coagulation can be maintained in extracorporeal circulation by means of shed blood separation and coating.

Objective: Conventional extracorporeal circulation results in an activation of coagulation cascades. Coating of extracorporeal circulation tubes as well as avoidance of shed blood recirculation have been shown to reduce these phenomena. We evaluated a new shed blood separation system (AVANT D 970) utilizing a coated cardiopulmonary bypass tube system (PHISIO).

Post-operative hypoalbuminaemia and procalcitonin elevation for prediction of outcome in cardiopulmonary bypass surgery.

Background: Because few studies have addressed postoperative hypoalbuminaemia in relation to hospital mortality, we evaluated this association and the prognostic value of increased procalcitonin (PCT) after cardiopulmonary bypass (CPB) surgery.

Methods: In 454 consecutive patients undergoing CPB, minimal serum albumin, colloid osmotic pressure (COP) and maximal PCT were retrospectively obtained from the 2nd to 10th postoperative day. Receiver operating characteristic (ROC) and multiple regression analyses determined independent predictive strength for 28-day mortality from preoperative albumin, Euroscore, postoperative minimal albumin and COP, and maximal PCT.

Are mechanical valves with enhanced inner diameter advantageous in the small sized aortic annulus?

Background: Mechanical bileaflet valves with enhanced inner diameter may offer superior hemodynamic properties in patients with a small aortic annulus. The aim of this clinical study was to compare these valves with standard bileaflet prostheses in vivo.

Methods: Mechanical aortic valve replacement for combined stenosis and regurgitation was performed in 47 patients with standard CarboMedics prostheses (CM: 21 mm, 23 mm, 25 mm) and two types of diameter enhanced St.

Revascularization during acute myocardial infarction: risks and benefits revisited.

Background: Indication for immediate revascularization during acute myocardial infarction (MI) is debated. Drug-resistant crescendo angina, as well as hemodynamic compromise, however, often requires acute operation. In this study the differential risks of acute coronary artery bypass grafting with and without MI were stratified.

Butyrylcholinesterase in lumbar and ventricular cerebrospinal fluid.

Objectives: This study establishes reference data for human lumbar CSF butyrylcholinesterase (E.C.3.

Acetylcholinesterase in lumbar and ventricular cerebrospinal fluid.

Background: Soluble acetylcholinesterase (AChE, E.C. 3.

Sample size determination for testing whether an identified treatment is best.

Laska and Meisner (1989, Biometrics 45, 1139-1151) dealt with the problem of testing whether an identified treatment belonging to a set of k + 1 treatments is better than each of the other k treatments. They calculated sample size tables for k = 2 when using multiple t-tests or Wilcoxon-Mann-Whitney tests, both under normality assumptions. In this paper, we provide sample size formulas as well as tables for sample size determination for k > or = 2 when t-tests under normality or Wilcoxon-Mann-Whitney tests under general distribution assumptions are used.

Clinical performance and periodontal outcome of temporary crowns and fixed partial dentures: A randomized clinical trial.

Statement Of Problem: Different materials (autopolymerizing, dual curing, and light initiated) are used for fabricating provisional restorations during prosthetic treatment. Randomized clinical trials that have evaluated these provisional materials have not been published.

Purpose: This clinical trial compared the handling, fitting, plaque adherence, gingivitis, color stability, and the subjective assessment of the provisional materials by the patient and the dentist for 2 autopolymerizing (Protemp, Luxatemp), 1 dual-curing (Provipont), and 1 light-initiated (Triad-VLC) material for the manufacturing of temporary crowns and fixed partial dentures.

Vulval diseases need an interdisciplinary approach.

Background: Vulval diseases are common, but their frequency and importance are often underestimated.

Objective: The study intended to evaluate the number of patients with vulval diseases seen in medical practice. Furthermore, the acceptance of an interdisciplinary vulval disease clinic, managed by a dermatologist in cooperation with a gynaecologist and a psychologist, was evaluated.

Drug monitoring of orally administered 8-methoxypsoralen in patients treated with extracorporeal photopheresis.

Recently extracorporeal photopheresis (ECP), a new therapy involving extracorporeal activation of orally administered 8-methoxypsoralen (8-MOP), has been established for the treatment of different skin diseases. The pharmacokinetic profile of 8-MOP has been pursued in a clinical study which aimed to assess the efficacy of ECP in patients with progressive systemic sclerosis and cutaneous T-cell lymphoma. However, the enormous intraindividual variations in plasma as well as buffy coat concentrations affect the efficacy of oral 8-MOP therapy.

Identification of the stimulated hemiretinae using a reduced number of PVEP trials.

Left and right hemifield pattern-reversal visual evoked potentials (PVEP) at P100 latency are characterised by typical field distributions of potential and the spectral parameter instantaneous frequency (IF). Both parameters can be utilised for the correct identification of the stimulated hemiretina in healthy volunteers (Hoffmann, K. et al.

Plasma and buffy coat concentration of 8-methoxypsoralen in patients treated with extracorporeal photopheresis.

Recently, a new therapy involving an extracorporal activation of orally administered 8-methoxypsoralen (8-MOP), photosensitizing furocoumarin, is established for the treatment of different skin diseases, extracorporeal photopheresis (ECP). The pharmacokinetic profile of 8-MOP has been pursued as part of a clinical study which should assess the efficacy of ECP in patients with progressive systemic sclerosis and cutaneous T-cell lymphoma. The enormous intra-individual variations proofed for plasma as well as buffy coat concentration are unfavourable for oral 8-MOP therapy.