There are more than 498,563 clinical trials published worldwide with over 60,000 trials that are currently either recruiting or not yet recruiting. Use our filters on this page to find more information on current clinical trials or past clinical trials (free or paid) for study purposes and read about their results.
In This experiment, the investigators would like to design a new itch model based on the spatial summation of pruritic stimuli. The hypothesis behind this study (spatial summation) is that two simultaneous applications of pruritogens will result in higher itch sensation compared with a single application of pruritogen.
Hemidiaphragmatic paresis is a common side effect of brachial plexus blocks such as supraclavicular or infraclavicular block techniques. It has been shown that diaphragma thickness is affected at some extent in supraclavicular block and also in costoclavicular block which is accepted as an infraclavicular approach. However, these two approaches have not been extensively investigated before in terms of the diaphragmatic paresis. Here, it is aimed to compare these two methods considering their effects on diaphragma thickness in inspirium and in expirium. Moreover, the performance properties such as motor and sensory block onset, needle visualization time, needle visualization difficulty, postoperative pain scores, and lastly the perfusion index which is known to be reflecting vasodilation will be investigated.
Gliomas are the most common type of primary brain tumors, with surgery followed by radiotherapy and chemotherapy as the main treatment modalities. However, they are highly prone to recurrence, presenting significant treatment challenges, especially for high-grade gliomas, which have a 5-year survival rate of only 5.5%. Paclitaxel, a common chemotherapeutic agent, exhibits antitumor effects in vitro that are 1400 times stronger than those of temozolomide (the first-line chemotherapy drug for gliomas). However, due to its large molecular weight (approximately 893 Da), it cannot cross the blood-brain barrier, precluding its use as a first-line treatment for gliomas. Preliminary research by our team has demonstrated that Specific Mode Electroacupuncture Stimulation (SMES) can open the blood-brain barrier, enhancing the concentration of albumin-bound paclitaxel (ABX) in tumor tissues, peritumoral tissues, and surrounding invasive tissues, thereby exerting antitumor effects. Consequently, this study aims to observe the safety and efficacy of SMES combined with ABX in treating patients with recurrent high-grade gliomas postoperatively, to explore its mechanisms of action, extend survival, improve quality of life, and forge new theories and methods for the integrative treatment of brain tumors combining traditional Chinese and Western medicine.
Rationale: Low level laser therapy, or photobiomodulation, is getting more attention as a non-invasive treatment strategy for numerous conditions. Phototherapy has been applied for more than 40 years for the treatment of musculoskeletal and neurological conditions. Low level laser therapy generally applies red or near-infrared lasers with a wavelength between 600 and 1000 nm and low power wattage from 5 to 500 mW and a power density between 1 and 5 W/cm2. The laser light is absorbed by the skin without thermal damage and penetrates deeply into tissues where it is supposed to induce its physiological effects at the cellular level. Laser therapy has been hypothesized to stimulate mitochondrial respiration, increase tissue oxygenation, and support tissue regeneration. Despite supportive research data on in vitro cell and in vivo animal data, there are surprisingly few data on the proposed impact of low level laser treatment (LLLT) on tissue metabolism in vivo in humans. Objective: To assess the impact of acute laser treatment on muscle tissue mitochondrial respiration in vivo in healthy, young adults. Secondary objectives include the in vivo assessment of cellular energy, anabolic, angiogenic and inflammatory pathways, along with enzyme activity within muscle and skin. Study design: Within-subject study. Study population: 12 healthy (BMI 18.5-30 kg/m2) young (age: 18-35 y) adults (6 men and 6 women). Intervention: One leg of the subjects will receive LLLT, while the other leg will receive no treatment. After the treatment muscle and skin biopsy samples will be taken from both legs. Main study parameters/endpoints: The primary outcome will be mitochondrial respiration of the LLLT treated and non-treated leg based on muscle samples. Secondary study parameters are muscle and skin gene expression, protein signalling and enzyme activity.
Investigation of the influence of the sense of presence during a Virtual Reality Cue-Exposure Therapy (VR-CET) with alcohol-associated cues on craving and relapse rates. Study group: abstinent patients (at least 18 years old) with a diagnosed alcohol dependence after completed inpatient withdrawal treatment in the the last 3 months. Primary hypothesis: the experience of presence during a virtual presentation of alcohol in alcohol-dependent patients is associated with levels of craving for alcohol during VR-CET.
Symptomatic irreversible pulpitis is a painful condition that requires anesthesia to perform effective dental procedures. The mental nerve block and inferior alveolar nerve block are two commonly used techniques for achieving anesthesia in the mandibular teeth. Study design: This randomized clinical trial study Number of participants: 96 participants which will be randomly divided into two groups: MINB and IANB. Inclusion criteria: Participants with mandibular premolars or lower anterior experiencing sharp and persistent pain in response to thermal stimuli and an electric pulp tester, as well as bleeding during access opening, will be included. Exclusion criteria: Participants with a medical history, allergies or contraindications to the local anesthetic, pregnant or breastfeeding women, those taking pain-affecting medication, or those experiencing pain in more than one tooth will be excluded. Both techniques will use 2% lidocaine and adrenaline 1:80,000. Age, gender, and the efficacy of anesthesia will be recorded in both groups. The chi-square test will be used for comparison.
Community acquired pneumonia (CAP) is one of the most common and morbid conditions encountered in clinical practice, which causes serious morbidity worldwide. In CAP, oxidative stress is linked to inflammation, demonstrated by increased production of interleukin (IL)-6 and tumor necrosis factor (TNF)-α, which attract inflammatory cells and increase oxidant production by these cells. Attenuation of oxidative stress via antioxidants would be expected to result in reduced pulmonary damage. Antioxidants have been found to be effective in alleviating lung injury and protecting against damage of other organs.
Colorectal cancer (CRC) is the third most common malignancy and the second leading cause of cancer-related death worldwide. Colonoscopy is considered the preferred method of screening for colorectal cancer, and resection of colorectal lesions can significantly reduce the incidence and mortality of colorectal cancer. In order to improve the qualitative and quantitative diagnosis of colorectal lesions, many endoscopic techniques, such as image-enhanced endoscopy (IEE), including narrowband imaging (NBI), magnifying endoscopy, pigment endoscopy, confocal laser endoscopy, and endocytoscopy (EC) are applied clinically. However, with the increasing number of endoscopic resection, the costs associated with the pathological diagnosis of endoscopic resection and resection specimens increase year by year. In clinical practice, some non-neoplastic colorectal lesions may not require resection, so it is important to distinguish neoplastic from non-neoplastic during colonoscopy. The application of EC is intended to achieve the purpose of real-time histopathological endoscopic diagnosis without biopsy. Several studies have shown that EC is effective in identifying the nature of colorectal lesions and judging the depth of invasion in CRC. Based on the endoscopic diagnosis, the endoscopist can determine the treatment plan for the colorectal lesions. The latest EC is an integrated endoscope with a contact light microscopy system with a maximum magnification of 520 x. EC can demonstrate the atypical of gland structure and cells after staining and display the super-amplified surface microvessels of the lesion under the EC-NBI mode. However, the judgment of endocytoscopic images needs a lot of experience to improve the diagnostic accuracy. Moreover, endoscopists have certain subjective judgments and errors in endocytoscopic diagnosis. There is an artificial intelligence system which has been developed to identify colorectal neoplasms. However, there is still a lack of prospective clinical verification based on Chinese population. In the study, the investigators performed a prospective clinical study to determine the diagnostic accuracy of artificial intelligence system.
The study team is studying how increasing dietary fiber, specifically through adding potato starch to participant's diet, may impact the species of bacteria in participant's gut microbiome. The study team also wants to understand if adding potato starch to participant's diet helps these bacteria make more short chain fatty acids, a byproduct the team thinks may benefit participant's health.
This phase I trial studies on how the PEOX-based polymer encapsulated paclitaxel FID-007 (FID-007) affects the immune cells around the tumor patients with head and neck squamous cell carcinoma. The active drug in FID-007 is paclitaxel, an established chemotherapy drug that has been shown to kill cancer cells. FID-007 is a packaged form of paclitaxel using a polyethylozaxoline (PEOX) polymer which may allow the drug to reach deeper into tumors and less into normal cells by being smaller. This study is being done to help identify future treatment options and better understand how to improve outcomes of patients with head and neck cancers after surgery.