View clinical trials related to Contact Allergy.
Filter by:This study will investigate what concentrations of the most common thiurams and carbamates that elicit allergic contact dermatitis under patch test and what concentrations of the rubber accelerators that elicit allergic contact dermatitis by repeated exposures under simulated use conditions. Further, it will investigate whether a damaged skin barrier as caused by wet work increase the severity of the allergic contact dermatitis. The participants will be assigned to either the SLS (sodium lauryl sulfate)-group or non SLS-group. For the participants of the SLS-group, one volar forearm will be randomized to be pre-irritated with a soap i.e. detergent: sodium lauryl sulfate (SLS) for 24 hours to simulate wet work. The participants of the non SLS-group will not be pre-irritated with SLS. Following this, the participants' volar forearms will be exposed to thiurams or carbamates and a control solution every night for 7 nights to simulate the repeated exposure to rubber gloves with accelerators. The skin reactions will be read cf. current international guidelines and further quantified using laser Doppler flowmetry. During the study, all participants will be patch tested on the upper back with rubber accelerators to investigate their current degree of sensitization and the dose-response relationships.
Aluminium allergy is predominantly seen in children with small itchy nodules in the skin after vaccinations, so-called granulomas. We want to do an exposure study where aluminium allergic children have to eat aluminium pancakes for a short period of time. The purpose is to investigate whether a worsening of the children's symptoms can be detected, both itching of the granuloma, allergic rash on the skin and also the symptoms that are not measurable, such as headache, stomach ache and general agitation. We also want to examine the concentration of aluminium in the urine, which reflects the absorption of aluminum from the gastrointestinal tract.
Aluminium is used in many different cosmetic products, including make-up, deodorants and sunscreen. The purpose of this study is to investigate whether these everyday skin products with small amounts of aluminium can cause skin reactions in children diagnosed with contact allergy to aluminium. The study is conducted as a Repeated Open Application Test study (ROAT), a method originally developed to clarify the clinical relevance of questionable and positive patch samples, by imitating everyday use of a skin product.
To find out if the use of an intranasal tear neurostimulator (ITN), may be useful in decreasing the pain symptoms felt by patients who experience contact lens discomfort.
Rationale: Foot ulcers among diabetics are common. The presence of a contact allergy limits the healing process. Contact allergies for wound dressings are common among patients with ulcers caused by venous insufficiency but less is known about contact allergies in diabetic patients with ulcers. Objective: To determine the prevalence of contact allergies for wound dressings in patients with diabetic foot ulcers. Study design: A prospective multicenter study. Study population: Patients (n=139) with diabetic foot ulcers caused by type 1 or 2 diabetes mellitus treated at Rijnstate Hospital Arnhem, the Netherlands. Main study parameters/endpoints: The primary study parameter is the presence of contact allergies for wound dressings. Nature and extent of the burden and risks associated with participation, benefit and group relatedness: An allergy test is standard procedure at Rijnstate Hospital, there is no direct technique-related burden or risk for the patient. In addition, wound dressings can be adjusted in patients where a contact allergy is determined which will benefit the prognosis of these patients. The data of this study will give insight in the prevalence of contact allergies for wound dressings in patients with diabetic foot ulcers.
In-stent restenosis remains one of the most challenging problems in patients after coronary artery angioplasty. Angiographically, it is discovered in 10% of the patients after drug-eluting stent (DES) implantation. There are multiple factors causing restenosis, which can be divided into two major groups: first vessel-dependent (based on the vessel's tortuosity, dimensions and lesion's calcification, all leading to suboptimal stent expansion), and second dependent on the inflammatory processes caused by the intervention. Study objectives is the analysis of the possible correlation between allergy to metals utilised during the stent manufacturing (nickel, cobalt, chromium, molybdenum, tungsten) and in-stent restenosis occurence. The angiographic results of stent implantation, and in-stent restenosis will be assessed independently by two skilled interventional cardiologists, and in case of their discrepant opinions, the decision will be made on the basis of the third cardiologist. The tests will be applicated during the hospitalisation, then read after 48 hours and 72 hours, and subsequently interpreted by the skilled dermatologist, during the hospital stay or afterwards.
Repeated insult patch test on healthy males and females to determine potential contact irritation or contact allergy in the skin