Effect of Lithotomy Position on Optic Nerve Sheath Diameter

NCT06464419 | Recruiting

• 1 other identifier: 14408
• Study Type: observational
• Target: 52
• Locations: 1 country
• Sites: 1

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.

Conditions

Optic Nerve Cup; Intracranial Pressure Increase

Keywords

ultrasonography, lithotomy position

Outcome Measures

Primary Outcomes (1)

• Effect of lithotomy position on optic nerve sheath diameter

  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).

  intraoperative and postoperative 10 minutes

Study Arms (1)

Patients who will undergo RIRS surgery

Patients who will undergo RIRS surgery in the lithotomy position

Device: ultrasound

Interventions

ultrasound DEVICE

Measurement of optic nerve sheath diameter by ultrasound

Patients who will undergo RIRS surgery

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Probability Sample

Study Population

A total of 52 patients, ASA I-II, aged between 18-65, who are scheduled for elective RIRS surgery under general anesthesia will be included.

You may qualify if:

• 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

You may not qualify if:

• 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

Sponsors & Collaborators

• Başakşehir Çam & Sakura City Hospital: lead
• Ankara Etlik City Hospital: collaborator

Study Sites (1)

EtlikCityHospital

Ankara, Turkey (Türkiye)

RECRUITING

Related Publications (3)

• Maissan IM, Dirven PJ, Haitsma IK, Hoeks SE, Gommers D, Stolker RJ. Ultrasonographic measured optic nerve sheath diameter as an accurate and quick monitor for changes in intracranial pressure. J Neurosurg. 2015 Sep;123(3):743-7. doi: 10.3171/2014.10.JNS141197. Epub 2015 May 8.

  PMID: 25955869 RESULT

• Besir A, Tugcugil E. Effects of tourniquet usage in lower extremity surgery on optic nerve sheath diameter. Turk J Med Sci. 2018 Oct 31;48(5):980-984. doi: 10.3906/sag-1803-132.

  PMID: 30384564 RESULT

• Blecha S, Harth M, Schlachetzki F, Zeman F, Blecha C, Flora P, Burger M, Denzinger S, Graf BM, Helbig H, Pawlik MT. Changes in intraocular pressure and optic nerve sheath diameter in patients undergoing robotic-assisted laparoscopic prostatectomy in steep 45 degrees Trendelenburg position. BMC Anesthesiol. 2017 Mar 11;17(1):40. doi: 10.1186/s12871-017-0333-3.

  PMID: 28284189 RESULT

MeSH Terms

Conditions

Intracranial Hypertension

Interventions

Ultrasonography

Condition Hierarchy (Ancestors)

Brain Diseases; Central Nervous System Diseases; Nervous System Diseases

Intervention Hierarchy (Ancestors)

Diagnostic Imaging; Diagnostic Techniques and Procedures; Diagnosis

Study Officials

• Cansu Ekici

  EtlikCityHospital

  STUDY DIRECTOR

Central Study Contacts

Cansu Ekici

CONTACT

+905322036054; cansugun00@gmail.com

Study Design

• Study Type: observational
• Observational Model: CASE CONTROL
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER GOV
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: June 13, 2024
• First Posted: June 18, 2024
• Study Start: June 10, 2024
• Primary Completion: August 10, 2024
• Study Completion: September 1, 2024
• Last Updated: August 5, 2024

Record last verified: 2024-06

Locations

TU (1)