Intracranial Pressure Increase, Optic Nerve Cup
Conditions
Keywords
ultrasonography, lithotomy position
Brief summary
In this study, the effect of increased venous return and increased intra-abdominal pressure on intracranial pressure in the lithotomy position was evaluated.
Detailed description
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.
Interventions
DEVICEultrasound
Measurement of optic nerve sheath diameter by ultrasound
Sponsors
Ankara Etlik City Hospital
Başakşehir Çam & Sakura City Hospital
Study design
Observational model
CASE_CONTROL
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes
Inclusion criteria
* 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
Exclusion criteria
* 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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Effect of lithotomy position on optic nerve sheath diameter | 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). |
Countries
Turkey (Türkiye)
Contacts
Primary ContactCansu Ekici
Outcome results
None listed