Shoulder Arthroscopy
Conditions
Brief summary
The beach chair position (BCP) has been commonly used for shoulder arthroscopic surgery. Hemodynamic instability is frequently encountered problem associated with BCP. In addition, high rates of cerebral desaturation events have been reported during surgery in BCP. Although fluid loading could alleviate hypotension associated with BCP, it may lead to volume overload. As an alternative to static indices, dynamic preload indices such as pulse pressure variation (PPV) and stroke volume variation (SVV) were reported to be sensitive predictors of fluid responsivness in several surgical condition. The investigators will examine the abilities of PPV and SVV to predict fluid responsivness during shoulder arthroscopic surgery in BCP. Using transesophageal echocardiography (TEE), the investigators will directly estimate the change of cardiac output during BCP.
Interventions
None listed
Sponsors
Yonsei University
Study design
Observational model
CASE_ONLY
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
20 Years to 75 Years
Healthy volunteers
No
Inclusion criteria
1. Above 20 years of age. 2. American Society of Anesthesiologists (ASA) Physical Status I, II, III. 3. shoulder arthroscopy under Beach-chair position
Exclusion criteria
1. severe functional liver or kidney disease 2. diagnosed HF ( NYHA class \>3) 3. cerebrovascular disease 4. Pregnancy
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| The changes between dynamic preload indices (SVV and PPV) and stroke volume index during beach chair position. We will measure them to evaluate the effect of beach chair position on PPV and SVV. | The participants will be followed up to 5 minutes after fluid challenge. | To investigate the ability of SVV adn PPV to predict fluid responsiveness during beach chair position, using ROC curve. |
Outcome results
None listed