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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
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...
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.
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...
The purpose of this research study is to investigate different doses of proton pump inhibitors in reducing cough symptoms felt to be associated with Gastroesophageal reflux disease (GERD)....
The objectives of this study are to determine the sensory-mechanical responses to Eucapneic Voluntary Hyperventilation (EVH) and Hypertonic Saline (HS) in individuals with cough variant as...
Citric acid has been used for over six decades to induce cough; however the mechanism of its pro-tussive effect is still not fully understood. We assessed the response to inhalation of citric acid at ...
Gastroesophageal reflux is considered to be a significant contributing factor to chronic unexplained cough. Patients are often presumed to have reflux-induced cough and are exposed to high-dose and lo...
Chronic cough is a common symptom and related to several pulmonary, airway and heart diseases. When all likely medical explanations for the coughing are excluded, there remains a large group of patien...
Cough is a physiological reflex to protect airways against aspiration, but also it is one of the most frequent problems that lead patients to seek medical care. Chronic cough is more prevalent in the ...
Chronic idiopathic cough is a common and often frustrating complaint for patients as well as providers. When common etiologies of cough are ruled out and/or do not respond to usual treatments, neuroge...
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. ...