Active clinical trials for "Hypersensitivity"

The purpose of this study is to determine if adding blue dye improves the saline load test, which is a way to detect a traumatic intraarticular knee injury by injecting normal saline into the knee and looking for outflow through the wound.

Background:Hypersensitivity pneumonitis (HP) is an interstitial lung disease that develops after inhalation of organic or inorganic antigens in susceptible individuals. The nasal mucosa is constantly exposed to these antigens that can irritate the respiratory mucosa. Objectives: to assess the burden of sinonasal symptoms in HP patients and to evaluate the nasal histopathology in those patients.

The purpose of the study is to test whether children with Attention Deficit/Hyperactivity Disorder (ADHD) are more susceptible to false memory production using a DRM paradigm. The number of "critical decoy production" errors will be analyzed and compared to the calibration of the test.

The aim of our study will be to establish in how many subjects with gastrointestinal symptoms and previous diagnosis of irritable bowel syndrome (IBS), the clinical picture is attributable to non celiac gluten sensitivity (NCGS) or fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAPs) intolerance. For this purpose, all subjects with IBS will take a low FODMAPs diet, which implies the absence of cereals and consequently of gluten, and those presenting symptom improvement during this dietary treatment, will be exposed to a double-blind gluten or placebo challenge, to make a diagnosis of NCGS.

The researchers are trying to develop an allergy skin test to help predict allergic responses to medications commonly given to patients during surgery.

Purpose: This study will evaluate a new ultrasound imaging technology called acoustic angiography. Acoustic angiography uses an ultrasound contrast agent, already FDA approved for use in cardiology, to enhance imaging of blood vessels. Since acoustic angiography uses ultrasound, and not x-rays, the patient is not exposed to ionizing radiation, unlike traditional angiography and mammography. Specific goals will be to evaluate the quality of the images provided by acoustic angiography in the human breast, and furthermore to evaluate whether or not acoustic angiography provides additional diagnostic information over traditional ultrasound which could provide an improvement in assessing breast lesions. Specifically, this additional diagnostic information will hopefully enable us to reduce false positive tests and discriminate lethal cancers from non-lethal disease. Participants: The investigators are recruiting 60 patients from the UNC Breast Clinic who are undergoing core needle biopsy or surgical biopsy (BIRADS 4 and 5 breast lesions). Procedures (methods): Acoustic Angiography imaging will be performed in conjunction with standard diagnostic imaging, including b-mode ultrasound . Then, a reader study will be conducted to compare these modalities. Finally, the images will be analyzed with image processing techniques to determine quantitative metrics exhibited by the blood vessel morphology in the images. These metrics will be utilized to develop a "malignancy score" equation to predict malignancy of a lesion.

Study hypothesis: Some children and adolescents with fish allergy can tolerate eating some species of fish Purpose of the study: The purpose of this study is to determine to which degree fish allergic children and adolescents can tolerate some species of fish and find the minimal eliciting allergen dose to which only 10% of participants get allergic reaction. Participants: Participants are 40 patients recruited from children and adolescents outpatient clinics at the University Hospital of North Norway with a history of fish allergy and sensibilisation of one or more fish species with either positive specific IgE in serum or skin prick test. Patients with sensibilisation to one or more fish species that never have eaten fish are also recruited. Method: All participants undergo a clinical examination including lung function test with spirometry before inclusion in the study. All participants are tested for allergic sensibilisation with measure of specific IgE against common food and inhalation allergens in addition to 10 different fish species. All participants are challenged with cod, salmon, mackerel and placebo, disguised in a chocolate mousse. The challenges are performed in randomized order with Double Blind Placebo Controlled Food Challenge (DBPCFC) on 4 different challenge days with minimum 6 weeks in between each challenge day. Participant with allergy to pollen will not be challenged during pollen season. Test food is developed especially to this study in cooperation with The National Institute of Food Research in Norway and The University of Manchester. The National Institute of Food Research in Norway have produced a dried powder of cod, salmon and mackerel. The "Molecular Allergology group at Manchester Institute of Biotechnology, the University of Manchester, have produced test kits based on chocolate mousse containing low and high doses of the fish powders. The National Institute of Food Research have measured protein content and microbiology in the fish powders. The Molecular Allergology group have provided quality measurements of the final product and tested the disguise in a sensoric test panel. Participants with no allergic reaction to one or more of the blinded challenges undergo open food challenge with larger doses of cooked fish than used in the DBPCFC, after the randomization has been broken.

It has been shown that the use of volatile anaesthetics, that are usually used to perform a general anesthesia, have cardioprotective properties. This has been shown in animal studies and in patients that underwent cardiac surgery. The aim of our study is to examine if Sevoflurane, a volatile anaesthetic, has this properties in patients undergoing lung surgery.

A Phase III study to determine the sensitivity and specificity of three solutions of different allergen extracts for diagnosis by skin prick-test: 5 Grasses pollen, Birch pollen, Dermatophagoides pteronyssinus mite

Cow's milk (CM) allergy is the most common food allergy in children, affecting 2-3% of infants. In formula-fed infants with CM allergy, extensively hydrolyzed or amino acid-based infant formulas are typically recommended. These formulas are expensive and not palatable. For older patients with CM allergy, the standard of care is avoidance of all CM products. The investigators cared for a CM allergic patient who was able to tolerate partially hydrolyzed whey formula (pHWF), which tastes better and is less expensive than extensively hydrolyzed or amino-acid based formulas. There are likely other subjects who could similarly tolerate pHWF. Furthermore, it is possible that taking pHWF could accelerate tolerance of CM. The investigators aim to identify characteristics of CM allergic subjects who can tolerate pHWF and assess the degree to which taking pHWF accelerates CM tolerance.