Effect of Head and Neck Positioning on Lung Sliding in Healthy Volunteers (NCT07351201) | Clinical Trial Compass
CompletedNot Applicable
Effect of Head and Neck Positioning on Lung Sliding in Healthy Volunteers
Turkey (Türkiye)31 participantsStarted 2026-01-20
Plain-language summary
The goal of this clinical study is to learn how different head-of-bed positions affect lung movement during breathing in healthy adults. Researchers want to understand whether raising the head of the bed changes how the lungs move, which may help guide patient positioning in emergency and intensive care settings.
The main questions this study aims to answer are:
Does lung movement change when the head of the bed is positioned at zero, twenty, or forty degrees?
Are there differences in lung movement between the right and left lungs?
Are there differences between the upper (apical) and lower (basal) parts of the lungs?
Participants will be healthy adult volunteers between eighteen and sixty years of age. Each participant will lie on a bed in three different positions: flat, with the head raised to twenty degrees, and with the head raised to forty degrees.
During each position, researchers will use bedside lung ultrasound, a painless and non-invasive imaging method, to measure lung movement at four areas of the chest. No medications, injections, or invasive procedures will be used.
This study may help health care providers better understand how body position affects breathing and support safer and more effective positioning of patients with breathing problems.
Who can participate
Age range
18 Years – 60 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Healthy adult volunteers aged eighteen to sixty years.
* No history of acute or chronic respiratory disease.
* Body mass index between eighteen point five and twenty-nine point nine kilograms per square meter.
* Ability to understand the study procedures and provide written informed consent.
* No skin lesions or wounds at the chest wall that would interfere with lung ultrasound examination.
Exclusion Criteria:
* History of respiratory system diseases, including asthma, chronic obstructive pulmonary disease, bronchiectasis, pneumonia, or tuberculosis.
* Presence of chest wall deformities (such as kyphoscoliosis or pectus deformities) or history of thoracic surgery.
* Inability to tolerate position changes during the study, including development of dizziness, syncope, or shortness of breath.
* Pregnancy or breastfeeding.
* Known significant cardiac, neurological, or metabolic disease.
* Known allergy to ultrasound gel or latex.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Change in Lung Sliding Amplitude Across Different Head-of-Bed Positions
Timeframe: Periprocedural (during a single study visit)