Intracranial Pressure Increase
Conditions
Brief summary
The purpose of this study is to evaluate the change of the optic nerve sheath diameter after deflation of pneumatic tourniquet.
Detailed description
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.
Interventions
PROCEDUREDeflation of pneumatic tourniquet
Deflation of pneumatic tourniquet
Sponsors
Asan Medical Center
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 79 Years
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| change of optic nerve sheath diameter | 5 minutes before deflation and at 5-minute intervals for 10 minutes after deflation | difference in optic nerve sheath diameter measured using ultrasound before and after deflation of pneumatic tourniquet |
Countries
South Korea
Outcome results
None listed