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To investigate the accuracy and correlation of estimating arterial CO2 pressure（PaCO2） using a transcutaneous CO2 pressure（PTCCO2） monitor in patients undergoing retroperitoneoscopic renal or adrenal surgery.
30 patients undergoing retroperitoneoscopic renal or adrenal surgery were included in this study.Their PaCO2, PetCO2, and PTCCO2values were measured at 3 time points before and 30min, 60min after pneumoperitoneum and calculated the different between each measure(PetCO2 and PTCCO2) and PaCO2. Agreement among measures was assessed by the Bland-Altman method.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| retroperitoneoscopic urologic surgery | Experimental | All included patients will undergo retroperitoneoscopic renal or adrenal surgery with the transcutaneous carbon dioxide monitor. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| transcutaneous monitor (TCM-4 monitor) | Device | TCM-4 monitor, which had changed new electrode membrane and was calibrated by the same person(who had been trained systematically) before each placement. The electrode should be heated to 44℃, then fixed it to the anterior part of chest in the location of lateral position after remove grease by alcohol. The positon of electrode must be changed every 2 hours in order to avoid thermal injury, and should be calibrated again. |
| Measure | Description | Time Frame |
|---|---|---|
| Bias and precision of the transcutaneous carbon dioxide measurements | correlation and agreement between PetCO2 and PaCO2 and PTCCO2 | 0 minutes(baseline) |
| Bias and precision of the transcutaneous carbon dioxide measurements | correlation and agreement between PetCO2 and PaCO2 and PTCCO2 | 30 minutes |
| Bias and precision of the transcutaneous carbon dioxide measurements | correlation and agreement between PetCO2 and PaCO2 and PTCCO2 | 60 minutes |
| Measure | Description | Time Frame |
|---|---|---|
| complication: appearance of signs of thermal injury (redness, skin erythema, blisters, necrosis) under application of transcutaneous sensor temperatures of 44°C ) | While the sensor temperatures heated to 44°C, the skin will be closely observed for any kind of thermic tissue damage | 0 minutes(baseline) |
| complication: appearance of signs of thermal injury (redness, skin erythema, blisters, necrosis) under application of transcutaneous sensor temperatures of 44°C ) |
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Inclusion Criteria:
Exclusion Criteria:
4.Subject has a condition or allergy which would prohibit placing the probe 5.Subject has participated in a trial with any experimental drug or device trial within 30 days prior to enrollment in the study
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| Name | Affiliation | Role |
|---|---|---|
| Shijiang Liu | The First Affiliated Hospital with Nanjing Medical University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| The First Affiliated Hospital of Nanjing Medical University | Nanjing | Jiangsu | 210029 | China |
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|
While the sensor temperatures heated to 44°C, the skin will be closely observed for any kind of thermic tissue damage |
| 30 minutes |
| complication: appearance of signs of thermal injury (redness, skin erythema, blisters, necrosis) under application of transcutaneous sensor temperatures of 44°C ) | While the sensor temperatures heated to 44°C, the skin will be closely observed for any kind of thermic tissue damage | 60 minutes |