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This study will look at whether accounting for the amount of pressure generated by the chest wall and abdomen in a obese patient, using a measurement called transpulmonary pressure, can help shorten the amount of time patients spend on the ventilator. By decreasing the amount of time patients spend on the ventilator, they are less likely to develop complications such as infections, weakness or more procedures.
Managing obese patients on the ventilator can be difficult due to the changes in their respiratory mechanics with little evidence as to best practices. This research will assess the utility of transpulmonary pressures in guiding mechanical ventilation in obese patients. This study with specifically look at whether using transpulmonary pressure guided positive end expiratory pressure (PEEP) titration for ventilation and spontaneous breathing trials (SBT) will shorten the time to liberation for obese patients on invasive mechanical ventilation for respiratory failure. The transpulmonary pressures will be calculated daily for all patients. Patients will also be assessed daily for readiness for SBT. In the intervention group, subjects' PEEP will be titrated to achieve an end expiratory transpulmonary pressure of 0-2 cm H2O. This PEEP will be used for the SBT and clinicians will be encouraged to keep their patients on this PEEP after the SBT if they are not extubated. In the control group, patients will also be assessed daily for SBT readiness but will be managed with standard set pressures of 5 to 10 cm H2O of PEEP and 5 to 8 cm H2O of pressure above PEEP. The primary team can perform a T piece trial prior to extubation as clinically indicated.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Transpulmonary pressure guided positive end expiratory pressure | Experimental | Patients in this group will have the positive end expiratory pressure on the ventilator set to a transpulmonary pressure of 0-2 cm H2O during ventilation and spontaneous breathing trials. |
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| Standard positive end expiratory pressure | Active Comparator | Patients in this groups will have the positive end expiratory pressure on the ventilator set by the clinician during ventilation and set to a standard positive end expiratory pressure of 5-8 cm H2O during spontaneous breathing trials. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| transpulmonary pressure guided positive end expiratory pressure | Other | Positive end expiratory pressure will be titrated to achieve a transpulmonary pressure of 0-2 cm H2O |
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| Measure | Description | Time Frame |
|---|---|---|
| Ventilator free days | Number of ventilator free days | 30 days |
| Measure | Description | Time Frame |
|---|---|---|
| Mortality | Number of patients who died during the study | 30 days |
| Days on invasive mechanical ventilation | Number of days patient spent on mechanical ventilation |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Mississippi Medical Center | Jackson | Mississippi | 39216 | United States |
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| ID | Term |
|---|---|
| D012131 | Respiratory Insufficiency |
| D009765 | Obesity |
| ID | Term |
|---|---|
| D012120 | Respiration Disorders |
| D012140 | Respiratory Tract Diseases |
| D050177 | Overweight |
| D044343 | Overnutrition |
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| standard positive end expiratory pressure | Other | Positive end expiratory pressure will be set to a standard 5-8 cm H2O by the clinician for spontaneous breathing trials |
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| 30 days |
| Re-intubation rate | Percentage of patients who were re-intubated after extubation failure | 30 days |
| Number of tracheostomies | Number of patients who received tracheostomies | 30 days |
| PEEP at extubation | the amount of positive end expiratory pressure set on the ventilator prior to extubation | 30 days |
| Intensive care unit length of stay | Number of days spent in the intensive care unit | 30 days |
| Hospital length of stay | Number of days spent in the hospital | 30 days |
| D009748 |
| Nutrition Disorders |
| D009750 | Nutritional and Metabolic Diseases |
| D001835 | Body Weight |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |