Esophageal Cancer
Conditions
Keywords
bispectral index, lateral decubitus position, one lung ventilation
Brief summary
The investigators try to conduct a study to assess the impact of changing patients' lateral decubitus position on BIS readings during esophageal cancer operation. Also, the investigators evaluate the effects of one-lung ventilation and total lung ventilation on BIS value with inhalation agent.
Detailed description
Bispectral index (BIS) was developed to monitor a patient's level of consciousness under general anesthesia. Several factors have been found to alter BIS readings without affecting the depth of anesthesia.Changing a patient's position (head up and head down) significantly affects the BIS values, which might affect the interpretation of anesthetic depth. During esophageal cancer surgery, there were several factors which could affect to BIS values.First, the surgical positions are consisted with supine and lateral decubitus position more than 1 h. Thus, the investigators compare the BIS value of both side on supine and lateral decubitus position by both side approach. Second, the one lung ventilation was applied for surgical filed. It alters the oxygenation and the cerebral flow. Because of these effects, the BIS monitoring can differ by the period of surgery. Thus, in this study, the BIS value of both side monitor throughout the surgery.
Interventions
DEVICEBIS
All patients applied BIS on both side (Left and Right)
Sponsors
Samsung Medical Center
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
OTHER
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
20 Years to 80 Years
Healthy volunteers
No
Inclusion criteria
the patients who are planned the esophageal cancer operation
Exclusion criteria
* patient who has dermatitis * patient who refuse to participate in this study
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in Bispectral index score | after lateral decubitus position 5 mins, 10 mins, 20 mins, 30 mins | The difference of both side BIS value on lateral decubitus position |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| the asymmetry of BIS | after supine position 5 mins, 10 mins, 20 mins, 30 mins | The difference of BIS on supine position |
| oxygenation and BIS | intraoperative | the effects of arterial blood gas analysis (O2 mmH2O and CO2 mmH2O) on BIS |
| The changes of BIS | intraoperative | the difference of BIS divided to 3 BIS level ( \<40,40-60,\>60) |
Countries
South Korea
Outcome results
None listed