Interscalene Blocks, Orthopedic Surgery, Perfusion Index and Pleth Variability Index
Conditions
Keywords
PI, PVI, Interscalene block
Brief summary
The purpose of this study is to: 1. To describe effects of interscalene nerve blocks on perfusion index (PI) and pleth variability index (PVI) (Radical 7, Masimo Cooperation, Irvine, CA) before and after induction of general anesthesia. 2. To compare effects of fluid-bolusing on PI and PVI of the anesthetized and non-anesthetized limb.
Interventions
None listed
Sponsors
Study design
Eligibility
Inclusion criteria
* patients scheduled for shoulder or upper arm surgery * ASA 1-3 * written informed consent * approval from the local ethics committee
Exclusion criteria
* arrhythmia * patients suffering from severe vascular disease, coronary artery (CCS IV) disease * anaemia (haemoglobin \< 7mg/dl) * patients in whom a tidal volume of 8ml/kg cannot be delivered safely
Countries
Germany