General Anesthesia, Surgery
Conditions
Keywords
any operation that required for general anesthesia
Brief summary
As increasing tidal volume, the cross sectional area and circumference of Internal Jugular Vein (IJV) could increase. And In the previous study, Trendelenburg position can increase size of IJV. So investigators would compare the cross sectional area, circumference of IJV and peak airway pressure in neutral and Trendelenburg position
Interventions
observation of IJV circumference and cross sectional area using ultrasonography by changing of tidal volume
Sponsors
Study design
Eligibility
Inclusion criteria
* patients who are undergoing general anesthesia
Exclusion criteria
* history of IJV cannulation * uncontrolled cardiovascular disease * severe pulmonary problem * cervical spinal impairment
Countries
South Korea