Identification of Subpopulations of Patients With Cholinergic Urticaria Based on Infrared Exposure Test Results.
Ориентир для пациента и семьи
Простыми словами
Автоматическая сводка по структурированным данным реестра. Она помогает сориентироваться, но не заменяет официальный протокол или оценку врача.
- Что изучают
- В протоколе указаны: Infrared exposure test.
- Кому может быть актуально
- Состояния в реестре: Cholinergic Urticaria. Базовые параметры: от 18 лет · Все.
- Что важно проверить
- Возраст, диагноз и пол — только базовые ориентиры. Предыдущее лечение, анализы и другие обязательные условия указаны ниже в критериях участия.
- Где проводится
- Франция
- Следующий шаг
- Сохраните исследование, покажите его лечащему врачу и уточните актуальный статус у исследовательского центра. Расходы, документы и поездка →
Не всё понятно в терминах? Прочитайте наш гид для пациентов →
Официальное название
Identification of Subpopulations of Patients With Cholinergic Urticaria Based on the Results of Infrared Exposure
Обзор
This study aims to identify subpopulations of patients with cholinergic urticaria based on their sensitivity to infrared (IR) radiation exposure. Cholinergic urticaria is a chronic inducible urticaria triggered by increased body temperature. The study seeks to determine whether infrared exposure can induce symptoms in a subset of patients and whether these patients exhibit specific clinical or epidemiological characteristics.
Подробное описание
Cholinergic urticaria is characterized by small pruritic papules triggered by exercise, emotions, hot environments, or hot food and beverages. The pathophysiology remains unclear, but one hypothesis is that a central temperature increase plays a key role. A pilot study conducted at university hospital center (CHU) of Montpellier found that infrared exposure triggered symptoms in some patients with cholinergic urticaria. The infrared source was the same as that commonly used in photobiological tests.
The objective of this study is to identify the proportion of patients who develop cholinergic urticaria when exposed to infrared light. the investigators then aim to determine whether these patients have specific clinical or epidemiological characteristics that would allow them to be classified as a distinct subgroup of cholinergic urticaria and to assess whether sensitivity to infrared light is a prognostic marker of disease severity. Furthermore, measuring the core temperature of all patients during infrared light exposure will help determine whether patients sensitive to infrared light experience a greater increase in core temperature during the IR test. This would support the hypothesis that an increase in core temperature is responsible for triggering cholinergic urticaria flare-ups in this subgroup.
A better understanding of this condition and the identification of different subgroups could ultimately, with additional studies, allow for a personalized approach to patient management based on the cholinergic urticaria subgroup and each subgroup's sensitivity to different treatments.
Вмешательства
- Диагностический тест Infrared exposure test
Patients will undergo a standardized infrared exposure test (this test is specifically for research purposes) to evaluate the occurrence of cholinergic urticaria reaction. IR exposure test with non-invasive core body temperature measurements, evaluate the occurrence of cholinergic urticaria up to 10 minutes after the end of the test, stop the test at the first clinical signs of urticaria. Desk lamp with infrared bulb, switched on 20cm vertically from the forearm posteriorly for 3 minutes. Read
Первичные конечные точки
- Positive infrared test result [Срок оценки: During the 3 minutes of exposure to infrared light and the following 10 minutes.]
Вторичные конечные точки (12)
- Comparison of age between patients with a positive and a negative infrared test [Срок оценки: Baseline]
- Comparison of age of onset of cholinergic urticaria, between patients with a positive and a negative infrared test [Срок оценки: Baseline]
- Comparison of sex between patients with a positive and a negative infrared test [Срок оценки: Baseline]
- Comparison of history of atopy between patients with a positive and a negative infrared test [Срок оценки: Baseline]
- Comparison of associated chronic urticaria, between patients with a positive and a negative infrared test [Срок оценки: Baseline]
- Comparison of cholinergic urticaria activity score,between patients with a positive and a negative infrared test [Срок оценки: Baseline]
- Comparison of triggering factors between patients with a positive and a negative infrared test [Срок оценки: Baseline]
- Comparison of treatment effectiveness (between patients with a positive and a negative infrared test [Срок оценки: Baseline]
- Comparison of time to onset of cholinergic urticaria (exercise) between patients with a positive and a negative infrared test [Срок оценки: Baseline]
- Comparison of time to onset of cholinergic urticaria (infrared) between patients with a positive and a negative infrared test [Срок оценки: Baseline]
- Comparison of maximum core temperature between patients with a positive and a negative infrared test [Срок оценки: Baseline]
- Comparison of average core temperature between patients with a positive and a negative infrared test [Срок оценки: Baseline]
Критерии участия
Критерии включения
- Adults ≥ 18 years old
- Cholinergic urticaria diagnosed based on the diagnostic criteria published in 2016 (Magerl et al) : pruritic micropapules triggered by active or passive exposure to heat.
- Exercise test performed within the 6 months prior to inclusion.
Критерии исключения
- Patients on H1 antihistamines within 72 hours before infrared exposure test
- Patients on any other specific treatment for cholinergic urticaria within a period of 5 plasma half-lives before infrared exposure test
- Patients with exercise-induced anaphylaxis (diet-induced or not)
- Patients with severe forms of cholinergic urticaria: angioedema, respiratory manifestations or anaphylaxis
- Participants who have reached the maximum compensation amount for their participation in research studies.
- Lack of consent (adults, non-emancipated minors, individuals unable to express consent, research conducted in emergency situations, etc.).
- Not being affiliated with or a beneficiary of a French social security scheme.
- Protected adults (under guardianship, curatorship, or judicial protection).
- Individuals participating in another research study with an ongoing exclusion period.
- Subjects deprived of liberty (Art. L. 1121-6) (by judicial or administrative decision, or involuntary hospitalization).
- Pregnant or breastfeeding women.
- Subjects who cannot read and/or write.
Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.
Здоровые добровольцы: Нет
Дизайн исследования
- Распределение
- Не применимо
- Модель
- Одна группа
- Маскирование
- Открытое
- Основная цель
- Диагностика
Центры проведения
Франция · 1 центр
- Chu de Montpellier — Montpellier
Идентификаторы
NCT: NCT06948188 · RECHMPL_24_0383