Pleth Variability Index as Predictors of Fluid Responsiveness in Modified Prone Position(Concord Position) or Knee-chest Position
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Fluid Responsiveness
- Sponsor
- Asan Medical Center
- Enrollment
- 44
- Locations
- 1
- Primary Endpoint
- To assess influence of the position change on PVI and other variables(PPV, SVV)
- Status
- Completed
- Last Updated
- 4 years ago
Overview
Brief Summary
To investigate whether PVI predicts the fluid responsiveness in modified prone position undergoing posterior approach cervical operation. Furthermore, modified prone position could influence on dynamic variables including stroke volume variation(SVV), pulse pressure variation(PPV) and PVI.
Detailed Description
Objective : To compare measurements of pleth variability index (PVI), pulse pressure variation (PPV) and stroke volume variation (SVV) to predict fluid responsiveness in modified prone position or knee-chest position (concord position) for cervical operation. To identify Influence of the modified prone position (concord position) on these variables. Method 1. To assess influence of the position change on PVI and other variables(PPV, SVV) 2. To assess PVI to predict fluid responsiveness at modified prone position
Investigators
Heesun Park
Clinical instructor of Anesthesiology and Pain department
Asan Medical Center
Eligibility Criteria
Inclusion Criteria
- •American Society of Anaesthesiologists'(ASA) physical status 1-3
- •patients who received cervical operation in modified prone position or knee-chest position
Exclusion Criteria
- •Valvular heart disease
- •Congestive heart failure, reduced left ventricular function ( Ejection fraction \< 40%)
- •Moderate grade of pulmonary disease
- •Arrhythmia (atrial fibrillation, atrial flutter.. etc.)
- •body mass index \> 30 or \< 15 kg/m2
Outcomes
Primary Outcomes
To assess influence of the position change on PVI and other variables(PPV, SVV)
Time Frame: 1.supine position : 5 minute after anesthesia induction with arterial-line insertion 2. 5 min after crystalloid 4 ml/kg loading / 3. modified prone position (baseline)
When position change from supine to modified prone position, to assess the change of PVI and other variables. The correlation of PVI and cardiac output during this change.
Secondary Outcomes
- To measure dynamic variables (pulse pressure variation, stroke volume variation and pleth variability index) in modified prone position(1. Supine position : 5 minute after anesthesia induction with arterial-line insertion 2. 5 minute after a position change to prone 3. before and after fluid loading)