ICU Respiratory Weakness Drives a Trial of Diaphragm Support
Critically ill patients who enter the intensive care unit with respiratory distress often lose more than breath alone. Immobility, reduced activity, and the physiologic stress of critical illness can weaken the diaphragm quickly, leaving a muscle that must do the hardest work in the body with too little reserve.
A new randomized controlled study at Bezmialem Vakif University is set to test whether diaphragmatic Kinesio taping, added to standard pulmonary rehabilitation, can help preserve diaphragm thickness and function over a very short ICU stay. The trial is designed around a practical bedside question: can a noninvasive external support strategy improve the respiratory muscle metrics that matter most when a patient is already vulnerable?
The study plans to enroll 48 adults admitted to the ICU because of respiratory distress and will assign them in a 1:1:1 ratio to three groups: pulmonary rehabilitation plus taping, pulmonary rehabilitation alone, or routine patient education.
Three Arms, Three Days, and a Focus on Ultrasound
The intervention window is deliberately short. Participants will receive treatment over three consecutive days, with the primary physiologic readouts collected at baseline and after the intervention period. Investigators will assess diaphragm muscle thickness during inspiration and expiration, diaphragm excursion, and diaphragm thickening fraction using ultrasonography.
Those measures are clinically meaningful because diaphragm thickness and contractile behavior are direct windows into respiratory muscle integrity. In the ICU setting, even modest losses in diaphragmatic performance can translate into poorer cough mechanics, reduced ventilatory reserve, and more difficult recovery from respiratory distress. Ultrasonography offers a bedside method to track those changes without adding invasive burden to an already fragile population.
The rehabilitation program itself is structured and intensive for the short timeframe. Sessions will be delivered three times daily for 30 to 45 minutes across three days and will include in-bed positioning, active-assisted range-of-motion exercises, pursed-lip breathing, chest breathing, diaphragmatic breathing, thoracic expansion exercises, maximal inspiratory breath-holding, breathing control, incentive spirometry, and controlled coughing and huffing techniques. During sessions, heart rate, respiratory rate, blood pressure, and oxygen saturation will be monitored continuously, and the intervention will stop if clinical instability appears.
Why the Tape Matters in a Weak Respiratory Muscle
The taping strategy is built on a simple mechanical premise. Elastic tape is applied to the anterior and posterior trunk along the costal margins, with the central point anchored below the xiphoid process in front and at the T12 level in back. The tape remains in place for three days, and patients are instructed to take a deep inspiration during application.
In theory, this external support may alter chest wall mechanics, improve proprioceptive input, or assist the patient’s breathing pattern in a way that complements rehabilitation. In the ICU, where muscle inactivity can rapidly erode function, even a modest mechanical cue could matter. The study will be able to separate whether the addition of taping produces a measurable difference beyond rehabilitation alone, or whether structured breathing work is sufficient by itself.
Skin sensitivity will be checked before application, which is important because the intervention depends on direct contact with the trunk. The protocol also excludes patients with skin lesions or a history of cutaneous hypersensitivity reactions, reducing the chance that local adverse effects confound the main respiratory findings.
A short intervention window will not answer every question about durability, but it does match the time course of early ICU deconditioning.
Functional Outcomes Extend Beyond the Diaphragm
This trial does not stop at imaging. Investigators will also measure cough-related quality of life with the Leicester Cough Questionnaire and assess anxiety and depression using the Hospital Anxiety and Depression Scale.
Those outcomes fit the ICU environment, where respiratory impairment is never purely mechanical. Cough efficiency influences secretion clearance and airway protection, while anxiety and depressive symptoms can shape a patient’s tolerance of rehabilitation and participation in breathing exercises. If taping or rehabilitation improves diaphragm mechanics, it may also affect how patients experience coughing, distress, and the psychological burden of critical illness.
Eligibility criteria keep the cohort relatively stable from a cardiopulmonary standpoint. Participants must be adults older than 18 years who require respiratory support, are suitable for pulmonary rehabilitation, and can provide informed consent. Exclusion criteria remove patients with fluctuating consciousness, Glasgow Coma Scale scores below 15, marked tachycardia or bradycardia, hypotension or severe hypertension, new arrhythmia or myocardial ischemia, mechanical ventilation, sedative or neuromuscular blocker use, pregnancy, and receipt of treatments beyond standard intensive care management.
What This Trial Can Clarify for Bedside Rehabilitation
The trial uses a parallel, randomized design with open-label treatment assignment, but allocation concealment is built in through sequentially numbered, opaque, sealed envelopes prepared by an independent researcher. The use of block randomization should limit imbalance across the three groups, which matters in a cohort this small.
The critical comparison is not simply whether patients improve over three days. It is whether diaphragmatic Kinesio taping adds measurable value to a rehabilitation program that already includes breathing exercises, thoracic expansion maneuvers, and cough training. If the combined arm shows better preservation of diaphragm thickness, better excursion, or a higher thickening fraction, the finding would support a more active role for external respiratory support in early ICU rehabilitation. If the rehabilitation-only arm performs similarly, the tape may turn out to be an unnecessary layer rather than an essential one.
The study is scheduled to begin in November 2026 in the intensive care unit of Istinye University Medical Park Gaziosmanpasa Hospital in Istanbul, with primary completion estimated for December 2026 and final completion by the end of that month. The sample is small, and the follow-up is brief, so the trial will not settle long-term recovery questions or define who benefits most. It will, however, provide a tightly focused look at whether a brief, noninvasive mechanical intervention can preserve diaphragm performance in a population where respiratory muscle decline can unfold fast.