Effect of Tourniquet Application on Optic Nerve Sheath Diameter

The Effect of Tourniquet Application on Optic Nerve Sheath Diameter and Cerebral Oxygenation During Lower Extremity Surgery

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT04758091

Enrollment

Registered

2021-02-17

Start date

2019-04-15

Completion date

2020-06-01

Last updated

2021-02-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Intracranial Pressure Increase

Keywords

Optic Nerve Sheath Diameter, Tourniquet, Cerebral Oxygenation

Brief summary

The aim of the study to investigate the effect of tourniquet application on optic nerve sheath diameter (ONSD) and cerebral oxygenation during lower extremity surgery.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Yes

Inclusion criteria

* ASA I-II risk group over the age of 18 * Operation planned under general anesthesia * Lower extremity surgery with a tourniquet * Agreeing to volunteer for research with an informed consent form

Exclusion criteria

* Emergency surgical procedures * neurological disease, carotid disease * Previous intracranial or ocular surgery * Neurological symptoms * cerebral edema, high IntraCranial Pressure * Presence of glaucoma * Body mass index (BMI)\> 35 * Uncontrolled hypertension * Diabetic retinopathy * anemia * coronary artery disease * peripheral artery disease

Design outcomes

Primary

Measure	Time frame	Description
optic nerve diameter	during the surgery	measuring the change in optic nerve diameter
regional cerebral oxgenation	during the surgery	measurement rSo2 by Near Infrared spectroscopy

Countries

Turkey (Türkiye)

Outcome results