The study aims to assess internal jugular vein ultrasound derived measurements and indices prior to spinal anesthesia in elderly population who fulfills predetermined inclusion criteria and might greatly benefit from an appropriate hemodynamic control during orthopedic surgery. Therefore, it is evaluated the diagnostic performance of these indices in predicting spinal-induced hypotension in this subset of participants.
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Internal jugular vein aerea (cm2) prior to spinal anesthesia implementation
Timeframe: 10 minutes prior to spinal anesthesia