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This study intends to use ultrasound to measure the bilateral diaphragmatic ultrasound indicators in critically ill patients, focusing on the left diaphragm, and to explore the consistency and reliability among various ultrasound indicators to evaluate the diaphragmatic mobility
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Invasive respiratory support group | The subjects of ultrasound measurement were patients with invasive mechanical ventilation | ||
| Noninvasive respiratory support group | The subjects of ultrasound measurement were patients with non-invasive respiratory support |
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| Measure | Description | Time Frame |
|---|---|---|
| Consistency of diaphragmatic mobility measurements between the standard and modified positions on the left side. | The main purpose is to verify the consistency of the two methods, Measurements were performed after switching patients in the invasive group (intubated patients to T-piece oxygen at 5 L/min and tracheostomized patients to face mask oxygen at 5 L/min following weaning), and patients in the non-invasive group (those receiving non-invasive ventilation or high-flow oxygen therapy) to conventional face mask oxygen at 5 L/min. | Measurements were performed 5 minutes after all patients were switched to conventional oxygen therapy at 5 L/min for the first time, once breathing had stabilized. |
| Measure | Description | Time Frame |
|---|---|---|
| Consistency of diaphragmatic excursion measurements between the standard position and the other four positions on the left side. | Consistency of measurement methods，Measurements were performed after switching patients in the invasive group (intubated patients to T-piece oxygen at 5 L/min and tracheostomized patients to face mask oxygen at 5 L/min following weaning), and patients in the non-invasive group (those receiving non-invasive ventilation or high-flow oxygen therapy) to conventional face mask oxygen at 5 L/min. |
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Inclusion Criteria:
①Adult patients (≥18 years old) of both sexes;
In invasive group, intubation or tracheotomy was changed to 5L/min T-tube or tracheotomy mask oxygen inhalation;
Patients in non-invasive group were treated with mask oxygen 5L/min;
Exclusion Criteria:
①The diaphragm ultrasound operation site was too large to obtain images.
Diaphragmatic ultrasound images could not be obtained in any section;
The ultrasound image quality of any section was poor;
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Critically ill patients
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| Prot | Yes | No | No | Study Protocol | Jan 8, 2026 | Apr 12, 2026 | Prot_000.pdf |
| ICF | No | No | Yes | Informed Consent Form | Jan 8, 2026 | Apr 12, 2026 | ICF_001.pdf |
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| ID | Term |
|---|---|
| D016638 | Critical Illness |
| ID | Term |
|---|---|
| D020969 | Disease Attributes |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
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| Measurements were performed 5 minutes after all patients were switched to conventional oxygen therapy at 5 L/min for the first time, once breathing had stabilized. |
| Consistency of diaphragmatic excursion measurements between the standard position and the other five positions on the right side. | Consistency of measurement methods，Measurements were performed after switching patients in the invasive group (intubated patients to T-piece oxygen at 5 L/min and tracheostomized patients to face mask oxygen at 5 L/min following weaning), and patients in the non-invasive group (those receiving non-invasive ventilation or high-flow oxygen therapy) to conventional face mask oxygen at 5 L/min. | Measurements were performed 5 minutes after all patients were switched to conventional oxygen therapy at 5 L/min for the first time, once breathing had stabilized. |