Ultrasonographic Evaluation of Optic Nerve Sheath Diameter in Patients Undergoing Retrograde Intrarenal Surgery in the Lithotomy Position
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 发起方
- 入组人数
- 52
- 试验地点
- 1
- 主要终点
- Effect of lithotomy position on optic nerve sheath diameter
研究概览
简要总结
In this study, the effect of increased venous return and increased intra-abdominal pressure on intracranial pressure in the lithotomy position was evaluated.
详细描述
In the lithotomy position, it is possible that venous return in the lower extremities increases and intra-abdominal pressure increases due to the position. At the same time, it is possible that the intracompartmental pressure in the extremities increases because the venous structure is compressed by placing the lower extremities on supports. Considering both conditions, it is predicted that there may be an increase in the optic nerve sheath diameter due to increased intracranial pressure in patients placed in the lithotomy position. The aim of this study is to investigate the effect of the position on intracranial pressure by ultrasonographically evaluating the optic nerve sheath diameter in the lithotomy position.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Patients who give informed consent
- •Patients who will undergo retrograde intrarenal surgery
- •Patients who are fully oriented and cooperative
- •ASA I-II patients
- •Patients between the ages of 18-65
排除标准
- •Disoriented and uncooperative patients
- •Patients with BMI>30
- •Patients who have had previous intracranial surgery
- •Patients who have had eye surgery before
- •Patients allergic to the pharmacological agents used in the study
结局指标
主要结局
Effect of lithotomy position on optic nerve sheath diameter
时间窗: intraoperative and postoperative 10 minutes
In patients in the lithotomy position, the linear probe of the ultrasound will be placed on the patient's upper eyelid in a transverse and longitudinal manner without applying compression, and the optic nerve's entry into the orbit will be visualized and measured. The increase in the optic nerve sheath diameter will be recorded by measuring at 7 different times in total.Before general anesthesia (t1), 3 minutes (min.) (t2) and 5 min. (t3) after general anesthesia, 3 min. (t4) and 5 min. (t5) after lithotomy position was given, before lithotomy position was corrected (t6) and when 10 minutes after patients go to the recovery room (t7).
次要结局
未报告次要终点