Change of Optic Nerve Sheath Diameter After Deflation of Pneumatic Tourniquet

N/ACompletedNCT03782077

Asan Medical Center20 enrolled

Overview

The purpose of this study is to evaluate the change of the optic nerve sheath diameter after deflation of pneumatic tourniquet.

Deflation of pneumatic tourniquet could induces many changes in various organ systems. It has been shown to affect intracranial pressure. Thus, the investigators evaluate the change of optic nerve sheath diameter using ultrasound after deflation of pneumatic tourniquet in patients undergoing knee surgery.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Intracranial Pressure Increase

Interventions

Deflation of pneumatic tourniquetPROCEDURE

Deflation of pneumatic tourniquet

Eligibility

Sex: ALLMin age: 18 YearsMax age: 79 Years

Medical Language ↔ Plain English

Inclusion Criteria: * ASA physical status 1-4 * patients undergoing knee surgery using pneumatic tourniquet Exclusion Criteria: * patients who refuse to participate in this study * patients with history of cerebrovascular disease * patients who are judged ineligible by the medical staff to participate in the study for other reasons

Locations (1)

Asan Medical Center

Seoul, South Korea

Outcomes

Primary Outcomes

change of optic nerve sheath diameter

difference in optic nerve sheath diameter measured using ultrasound before and after deflation of pneumatic tourniquet

Time frame: 5 minutes before deflation and at 5-minute intervals for 10 minutes after deflation

Data from ClinicalTrials.gov

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