There are about 25560 clinical studies being (or have been) conducted in Germany. The country of the clinical trial is determined by the location of where the clinical research is being studied. Most studies are often held in multiple locations & countries.
This study evaluates the intrastromal correction of ametropia with a femtosecond laser made by 20/10 PERFECT VISION. This laser generates a beam of ultrashort, infrared pulses which enables very precise cuts in the cornea. By these cuts lamellae of the cornea are separated locally, and in the consequence the curvature of the cornea is changed, and the correction of the diagnosed ametropia can be achieved. On the contrary to cuts which are generated with a sharp knife, the cuts generated when using a laser can be generated just inside the cornea without opening the surface of the cornea. This means the procedure is minimal-invasive. The study hypothesis is: Different types of ametropia can be corrected safely and on long-term by intrastromal cuts.
Preterm infants often need peripheral artery catheters for invasive blood pressure recording and to facilitate blood sampling. Near infrared spectroscopy is a method to evaluate cerebral oxygenation and as well as cerebral blood flow. Sampling procedures with identical sampling volumes are performed at a short (40 seconds) and a long (70 seconds) time intervall while changes of cerebral oxygenation are measured. The investigators hypothesise that slower sampling decrease changes in cerebral blood flow.
Preterm and critically ill neonates experience many painful manipulations. The aim of the study is to evaluate the influence of these experiences and maternal deprivation on later pain behavior. Using Scoring systems, Prechtl general movements, skin conductance, testing flexor reflex levels with von Frey filaments and measuring salivary cortisol levels the investigators compare pain behavior of preterm (birth weight (BW) < 1500 grams), term neonates with need of ventilation (> 48 hours) with healthy neonates at the time of their first vaccination at the age of 3-4 months. The investigators are also testing flexor reflexes and skin conductance and general movements in regular intervals during the initial hospital stay. The investigators hypothesize that pain behavior is different at the age of 3-4 months in children with many early painful experiences.
In patients with chest pain and/or shortness of breath coronary artery disease (CAD) is suspected depending on the pattern of symptoms and the electrocardiogram (ECG). Coronary angiography is the method of choice to verify this suspicion. If the patient coronary arteries on coronary angiography are totally normal or unobstructed, one can only speculate if the patients' discomfort is from the heart or not. A possibility to get further information about the healthiness of the coronary arteries is the acetylcholine test (ACH-test). When injecting this natural, body produced-substance into the coronary arteries one can test if the vessels develop coronary spasm which can be the reason for the patient's symptoms. The investigators therefore use this test in this study to look for coronary spasm in patients with suspected CAD but normal/unobstructed coronary arteries. In case of a positive test, the patient profits from having found a cause for his/her symptoms making treatment with special tablets possible. Furthermore, the investigators want to analyze blood samples of every patient to look for signs of inflammation, vasoconstriction and genetic variants that seem to be linked with coronary spasms. On the basis of these results the ACH-test could probably be avoided in the future.
The investigators will evaluate the effects of an endurance exercise program on the physical performance, the well being, and indicators of metabolic function in patients with an HIV infection.
Chocolate consumption has long been associated with enjoyment and pleasure. Popular claims confer on chocolate the properties of being a stimulant, relaxant, euphoriant and antidepressant. These possible pharmacological actions might be related to various biogenic amines, such as serotonin, dopamine, tyramine, histamine, phenylethylamine and cannabinoid-like substances. Most amines are metabolized by monoamineoxidase-A (MAO-A) and are therefore unable to pass the blood-brain-barrier. In contrast, phenylethylamine is a direct dopamine releasing ingredient and as a substrate of MAO-B and due to its lipophilic structure even capable to pass the blood-brain-barrier. Within this line, own clinical observations suggested an increased chocolate consumption in patients with Parkinson's disease (PD) compared to healthy subjects and to their pre-disease state. In a previous study, we assessed the consumption of chocolate and non-chocolate sweets in PD patients and their partners (as household controls) using a self-questionnaire. Consumption of chocolate was significantly higher in PD patients compared to controls, while consumption of non-chocolate sweets was similar in both groups. Our study suggests that chocolate consumption is increased in PD independent of concomitant depressive symptoms measured by BDI-1. Although reasons for increased chocolate consumption in PD remain elusive, it may hypothetically be a consequence of the high content of various biogenic amines as a content of cocoa influencing dopamine metabolism. Therefore, in the present study we aim to study the effects of dark chocolate with high cocoa content (85%) compared to chocolate without any cocoa (white chocolate) on motor symptoms in PD patients as measured with UPDRS part III (motor score). The principle design of the intervention is similar to the standard pharmacological challenge test for studying effects on motor symptoms in PD (e.g. levodopa challenge test).
The investigators will evaluate the effects of an exercise program (walking on a treadmill) on the physical performance, the cardiorespiratory function, the proclivity to heart arrhythmias and the quality of life of patients with severely impaired left ventricular function and a bi-ventricular resynchronization pacemaker.
The Increlex® Global Registry is a descriptive, multicenter, observational, prospective, open-ended, non interventional, post-authorisation surveillance registry. The main purpose of this global registry is to collect, analyse and report safety data during and up to at least 5 years after the end of treatment in children and adolescents receiving Increlex® therapy for SPIGFD according to the locally approved product information.
RATIONALE: Studying samples of blood from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer. PURPOSE: This research study is looking at blood samples in young patients with cytopenia after undergoing a donor stem cell transplant.
This clinical trial will investigate the hypothesis that D-Dimer testing can be successfully used to tailor the duration of OAT in patients after an unprovoked episode of deep venous thrombosis (DVT) using a prospective, randomized, and controlled design.