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Central sensitisation is an increase in the excitability of nerves within the central nervous system, which can lead to heightened sensitivity to certain stimuli. This process is involved in some chronic pain conditions e.g. migraines and non−cardiac chest pain. Recent work by our group suggests central sensitisation may be an important mechanism leading to chronic cough.
The main questions in this study include:
1. Can the investigators induce temporary central sensitisation of the cough reflex in healthy volunteers for testing of new medications?
2. Can the investigators demonstrate exaggerated sensitisation in patients with chronic cough (indicating these patients are already centrally sensitised)?
In animal studies, acid infusion into the gullet (oesophagus) is able to induce central sensitisation of the cough reflex. Acid infusion into the oesophagus has also been shown to induce central sensitisation in human healthy volunteers, increasing the sensitivity to pain on the front of the chest but this study did not test the the cough reflex. Using human participants, the investigators plan to test whether acid infusion into the oesophagus increases the sensitivity of the cough reflex in healthy volunteers and also patients complaining of chronic cough.
Hydrochloric acid 0.15 molar, Saline
Not yet recruiting
University of Manchester
Published on BioPortfolio: 2014-08-27T03:19:19-0400
To determine whether contraction abnormalities in the esophagus plays a role in gastroesophageal reflux induced cough, and thus cough severity in patients with chronic cough.
Objective: The study aimed to assess the effect of topical application of an amino acid + sodium hyaluronate acid gel after lower third molar extraction. Study design: 136 patients requir...
Comparison of citric acid and mannitol cough provocation tests among subjects with chronic cough and healthy volunteers.
Chronic cough is a common complain of patients in respiratory clinic and its global prevalence was up to 9.6%. Persistent cough of unexplained origin is a significant health issue that occ...
The primary objective of this study was to assess the effect of a single dose of gefapixant 100 mg on cough reflex sensitivity to various challenge agents (capsaicin, citric acid, adenosin...
Viscosity, pH and electrolytic conductivity of dilute, semidilute and concentrated chitosan solution with hydrochloric acid adding were compared and the change in conformation of chitosan in concentra...
Chronic cough is a common presentation to primary care and constitutes a significant volume of referrals to secondary care. It affects around 10% of the adult population and has a plethora of respirat...
A thorough anamnesis and the physical examination of a patient with cough mostly lead the way to the further diagnostic and therapeutic procedure. As far as there are no obvious reasons for the cough ...
Filamentous basidiomycetes (f-BMs) are involved in some unexplained chronic cough (UCC) cases that can be improved by the administration of antifungal agents. The disease concept was termed fungus-ass...
There are few original studies on the true role of normal chest radiograph (CXR) in exclusion of pulmonary conditions that may be associated with chronic cough. Thus, the aim of the study was to asses...
A strong corrosive acid that is commonly used as a laboratory reagent. It is formed by dissolving hydrogen chloride in water. GASTRIC ACID is the hydrochloric acid component of GASTRIC JUICE.
A subcategory of CHRONIC OBSTRUCTIVE PULMONARY DISEASE. The disease is characterized by hypersecretion of mucus accompanied by a chronic (more than 3 months in 2 consecutive years) productive cough. Infectious agents are a major cause of chronic bronchitis.
Agents that suppress cough. They act centrally on the medullary cough center. EXPECTORANTS, also used in the treatment of cough, act locally.
An acid dye used in testing for hydrochloric acid in gastric contents. It is also used histologically to test for AMYLOIDOSIS.
Hydrochloric acid present in GASTRIC JUICE.
Neurology - Central Nervous System (CNS)
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Pain is defined by the International Association for the Study of Pain as “an unpleasant sensory and emotional experience associated with actual or potential tissue damage or described in terms of such damage”. Some illnesses can be excruci...
An anesthesiologist (US English) or anaesthetist (British English) is a physician trained in anesthesia and perioperative medicine. Anesthesiologists are physicians who provide medical care to patients in a wide variety of (usually acute) situations. ...