View clinical trials related to High Altitude Pulmonary Edema.
Filter by:Research Title: RISK FACTORS ASSOCIATED WITH HIGH ALTITUDE SICKNESS: A CASE-CONTROL STUDY Rationale: The Study will help us to identify risk factors of high altitude sickness among Nepalese and International patients. Aims and Objectives: - To identify risk factors for high altitude sickness, including AMS, HACE, and HAPE. - To compare the prevalence of high altitude sickness between individuals who ascended rapidly versus those who ascended slowly. - To examine the association between high altitude sickness and various demographic and environmental factors, such as age, sex, altitude, and temperature. - To evaluate the effectiveness of preventative measures, such as gradual ascent and medication, in reducing the risk of high altitude sickness Research Hypothesis (if relevant): N/A 1. Material & Methods: 1. Whether study involves Human/animals or both : Human 2. Population/ participants: Patients presenting in Emergency Ward of District Hospital, Mustang with AMS (Acute Mountain Sickness), HAPE (High altitude Pulmonary Oedema) or HACE (High altitude Cerebral Oedema) as CASES Healthy volunteers who didn't develop any symptoms of AMS/HAPE/HACE after their trip to high altitude as CONTROLS 3. Type of study design: : Case Control Study 4. Human study : Inclusion Criteria: Cases: Individuals age 18 years or older who have been diagnosed with AMS based on a LLS score of ≥3 or HAPE or HACE. Controls: Individuals age 18 years or older who did not develop AMS during their trip to high altitude as the cases, and who are matched to cases on age and sex. Exclusion Criteria: - Those who deny consent for participation. - Age<18 years - Pregnant Women 5. Expected sample size : Sample size calculation: Mentioned in methodology 6. Control groups : N/A 7. Probable duration of study: 180 days 8. Setting: Emergency Ward 9. Parameter/Variables to be applied/measured Independent Variables i. Socio-demographic characteristics such as age, sex, address, nationality. Dependent Variables: i. Symptoms of Presentation ii. Ascent Rate iii. Co-morbidities iv. Past History including previous history of altitude sickness v. Personal History such as smoking, alcohol intake, recreational drugs vi. Awareness on High Altitude Sickness vii. Intake of Prophylactic medicine (Acetazolamide) viii. Past history of Covid-19 , TB Outcome measures: Primary (main outcome): All dependent variables (i) Rational for statistical methods to be employed : Data will be entered in Microsoft Excel and converted it into SPSS for statistical analysis . Descriptive statistics will be used to summarize the characteristics of cases and controls. Univariate and multivariate logistic regression analyses will be performed to assess the association between risk factors and high altitude sickness. The results will be reported as odds ratios with corresponding 95% confidence intervals. A p-value of less than 0.05 will be considered statistically significant. (ii) Ethical clearance : Ethical clearance will be obtained from National Health Research Council of Nepal (iii) Permission to use copyright questionnaire/Pro forma: Not applicable (j) Maintain the confidentiality of subject Confidentiality of the participants will be maintained. Whether available resources are adequate: Yes 1. Other resources needed: No 2. For Intervention trial: Not applicable
High altitude pulmonary edema (HAPE) is mostly treated with supplemental oxygen, nifedipine 30mg twice a day, rest, limiting cold exposure and descent (simulated or actual) Gamow Bag provides simulated descent and buy time for actual descent. CPAP is claimed to be effective in many case reports to treat HAPE temporarily until actual descent is taken place. This study aims to evaluate the role of CPAP in treating HAPE at those high altitude stations where Gamow bag is not available and immediate descent is not possible.
Trial of Non-Invasive Positive Pressure Ventilation Management of High Altitude Pulmonary Edema
The primary objective is to evaluate the efficacy of continuous positive pressure on resolution of high-altitude pulmonary edema vs high flow oxygen. The secondary objective is to derive an incidence of high-altitude pulmonary edema based on the elevation and timing from which the subject arrives. Additionally, in a convenience sample of the base study population, an ultrasound evaluation for the presence of B lines in the lungs will be conducted after 2 hours.
The overall goal of this study is to detect preclinical signs of HAPE by lung ultrasonography and evaluate the effectiveness of acetazolamide at decreasing pulmonary edema by using ultrasound.
We use a new technology (Nexfin from BMEYE-Inventive Hemodynamics) to monitor Cardiac Output, Blood Pressure, Fluid Responsiveness, Pulse Oximetry, Hemoglobin Concentration, Oxygen Delivery in Climbers during their process of acclimatization on a expedition to Mount Aconcagua.
Mechanisms underlying high-altitude intolerance as well as exercise performance limitation in hypoxia still remain to be fully understood. Recent data suggest that sleep disturbances on one hand and cerebral perturbations on teh other hand may be key mechanisms. The investigators evaluated 12 healthy subjects at sea level and at 4400 m of altitude for 7 days in order to better describe sleep and cerebral responses. The investigators hypothesized that sleep and cerebral disturbances play a critical role for the developement of acute mountain sickness and for exercise performance limitation during acute high-altitude exposure.
The purpose of this study is to determine whether regular oral use of sildenafil citrate can prevent or attenuate high altitude illnesses.
It has been shown, that subjects susceptible to high altitude pulmonary edema (HAPE)are characterized by an abnormal increase of pulmonary artery pressure at rest in hypoxia and during exercise in normoxia. This abnormal rise of pulmonary artery pressure has also been observed in about 10 % of otherwise healthy subjects without prior altitude exposure. The aim of the study is to investigate the susceptibility to HAPE in unacclimatized subjects with abnormal increase of pulmonary artery pressure at rest in hypoxia and during exercise in normoxia after rapid ascent to high altitude (4559 m).
A double-blind placebo controlled study - To compare the effect of tadalafil and dexamethasone versus placebo on Ppa and pulmonary edema formation in subjects susceptible to HAPE. - To investigate the effect of dexamethasone on alveolar fluid clearance, as assessed by measurement of the nasal potential difference, and prevention of HAPE. - To investigate the effect of the tadalafil and dexamethasone versus placebo on the dynamic CBF autoregulation properties and on the development of AMS in HAPE susceptible subjects.