Active clinical trials for "Dyspnea"

EFFECTS OF INCENTIVE SPIROMETRY ON DYSPNEA AND CHEST CLEARANCE IN ASTHMATIC PATIENTS DURING SEASONAL SMOG

The goal of this interventional study is to compare muscle reflex function under settings of normoxia (normal oxygen level), acute hypoxia (brief oxygen-lack) and chronic hypoxia (long-duration exposure to oxygen-lack). The main question is: Does the muscle reflex adapt to chronic hypoxia? Young, healthy participants will complete light-to-high intensity cycling exercise with and without suppression of the muscle reflex. Suppression of the muscle reflex will be via spinal administration of the opioid Fentanyl. In the control condition, saline will be administered into the spinal space. Participants will complete control (saline) and experimental (Fentanyl) exercise conditions at sea-level (Kelowna, BC, Canada) breathing room air and whilst breathing a lower fraction of oxygen (acute hypoxia). Thereafter, participants will complete the exercise test after living at high altitude (White Mountain, CA, USA) for 2 weeks whilst breathing room air (chronic hypoxia) and breathing a higher fraction of oxygen (restored normoxia).

Exertional dyspnea is a major cause of exercise limitation and anxiety, and contributes importantly to reduced quality of life for patients with COPD. The aim of this study is to determine the efficacy and mechanism of NIV with a dual-limb circuit plus oxygen therapy in relieving exertional dyspnea in patients with severe COPD, so as to provide a guidance for clinical use for NIV.

Patients with chronic obstructive pulmonary disease are often limited in their exercise capacity by intolerable shortness of breath (dyspnea). Patients are breathing at high lung volumes during exercise which forces inspiratory muscles to work at a high percentage of their maximal capacity. This increased inspiratory effort has been shown to be independently related to symptoms of dyspnea during exercise in previous research. Eight weeks of high intensity variable flow resistive inspiratory muscle training is hypothesized to reduce inspiratory effort and to decrease neural drive to inspiratory muscles. These factors are hypothesized to jointly contribute to delaying the occurrence of intolerable symptoms of dyspnea and to improve exercise tolerance in these patients.

The goal of this clinical research study is to learn if dexamethasone can help reduce shortness of breath in cancer patients. Researchers also want to learn if it can help to improve lung function and quality of life. In this study, dexamethasone will be compared to a placebo. Dexamethasone is commonly used for treatment of nausea, tiredness, and pain. It may help patients with shortness of breath. A placebo is not a drug. It looks like the study drug but is not designed to treat any disease or illness. It is designed to be compared with a study drug to learn if the study drug has any real effect.

The main objective of our study is to compare the effects of two care strategies for dyspneic patients on the length of hospital stay: (1) standard care (=contextual analysis + conventional clinical chest radiography) versus (2) standard care + pleuropulmonary ultrasound.

Acute dyspnea is a common chief complaint of patients presenting to the emergency department. Patients with acute dyspnea display a high mortality rate. In-hospital mortality is as high as 10% during hospitalization and up to 30% within 6 months of follow-up. The Triple A Initiative Study is designed to improve the coordination of care for patients with acute dyspnea alerting the Emergency Medical Service (EMS). We hypothesize that the coordination of care starting at the EMS level including point-of-care testing of the cardiac biomarker NTproBNP will support preclinical and clinical diagnostic clarification. Treatment deriving from earlier diagnostic clarification will reduce length of stay in the hospital, treatment costs and improve patient's outcome.

This study assessed the effect of QVA149 on patient-reported dyspnea in moderate to severe Chronic Obstructive Pulmonary Disease (COPD) patients.

Rational. The mismatch between the activity of the respiratory muscles and the assistance delivered by the ventilator results in patient-ventilator disharmony, which is commonly observed in ICU patients and is associated with dyspnea and patient-ventilator asynchrony. Both dyspnea and asynchrony are in turn associated with a worse prognosis. Unlike conventional modes of mechanical ventilation, such as pressure support ventilation (PSV) that deliver a constant level of assistance regardless of the patient effort, Proportional Assisted Ventilation (PAV) adjusts the level of ventilator assistance to the activity of respiratory muscles. To date, data on the impact of PAV on dyspnea and patient ventilator asynchrony are scarce and most studies have been conducted in healthy subjects or in ICU patients who had no severe dyspnea nor severe asynchrony. To our knowledge, there are no data in patients with severe patient-ventilator dysharmony. Study Aim. To evaluate the impact of PAV on dyspnea and patient-ventilator asynchrony in ICU mechanically ventilated patients in intensive care with severe patient-ventilator disharmony defined as either severe dyspnea or severe patient-ventilator asynchrony. Patients and Methods. Will be included 24 ICU mechanically ventilated patient exhibiting severe patient-ventilator dysharmony with PSV. The intensity of dyspnea will be assessed by the VAS, the ICRDOSS and by the electromyogram of extradiaphragmatic inspiratory muscles and pre inspiratory potential collected from the electroencephalogram. The prevalence of patient-ventilator asynchrony will be quantified. Expected results. It is anticipated that the switch from PSV to PAV will decrease the prevalence and severity of dyspnea and the prevalence of patient-ventilator asynchrony.

The goal of this clinical research study is to learn if fentanyl can help shortness of breath in cancer patients. Researchers also want to learn if the study drug can help to improve your physical function.