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Study never officially began
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The purpose of this study is to test the hypothesis that decreasing the inspired oxygen concentration during thoracic surgery requiring one lung ventilation will improve post-operative oxygenation.
One lung ventilation is frequently required during thoracic surgery and results in decreased lung function post-operatively. Supra-physiologic oxygen levels during surgery may contribute to this decrease in lung function by worsening lung injury intra-operatively.
This study will include patients undergoing surgery to remove a lung lobe requiring one lung ventilation.
The patients will be divided into two groups with the experimental group receiving a 60% oxygen in air mixture and the control group receiving 100% oxygen.
The two groups will be compared by using a measure of lung function (the ratio of the partial pressure of oxygen in arterial blood to the inspired oxygen concentration) and blood levels of a protein correlated with lung injury (receptor of advanced glycation end products RAGE).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| 100% FiO2 | Active Comparator | 100% oxygen administered during pulmonary lobectomy surgery. |
|
| 60% FiO2 | Experimental | 60% oxygen administered during pulmonary lobectomy surgery. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| 60% oxygen | Drug | An inspired oxygen concentration of 60% will be administered during pulmonary lobectomy surgery. |
|
| Measure | Description | Time Frame |
|---|---|---|
| PaO2 to FiO2 ratio | The ratio of the partial pressure of oxygen in arterial blood (PaO2) to the inspired oxygen concentration (FiO2). An arterial blood sample will be drawn from an arterial line on post-operative day 1 and the FiO2 at the time of blood draw will be documented to calculate the ratio. | Post-operative day 1 |
| Measure | Description | Time Frame |
|---|---|---|
| Mortality | Mortality will be determined by accessing the medical record. | 30 days |
| Mortality | Mortality will be determined by accessing the medical record. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Wanda Popescu, MD | Yale University | Principal Investigator |
| Nathan Clendenen, MD,MS | Yale University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Yale New Haven Hospital | New Haven | Connecticut | 06510 | United States |
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| ID | Term |
|---|---|
| D018496 | Hyperoxia |
| ID | Term |
|---|---|
| D012818 | Signs and Symptoms, Respiratory |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
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| ID | Term |
|---|---|
| D010100 | Oxygen |
| ID | Term |
|---|---|
| D018011 | Chalcogens |
| D004602 | Elements |
| D007287 | Inorganic Chemicals |
| D005740 | Gases |
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| 100% oxygen | Drug | An inspired oxygen concentration of 100% will be administered during pulmonary lobectomy surgery. |
|
|
| 1 year |
| Hypoxemia less than 90% | This will be recorded from the intraoperative data acquired during surgery. | Intra-operative |
| Blood level of receptor of advanced glycation end-products (RAGE) protein | The receptor of advanced glycation end-products (RAGE) protein levels correlates with alveolar epithelial lung cell injury and will be measured in a blood sample collected on post-operative day 1. | Post-operative day 1 |