Spinal anesthesia hypotension Autonomic nervous system
Conditions
Interventions
Crossover study.
Experimental group: 60 patients ASA I to III, to undergo orthopedic surgery of lower limbs under spinal anesthesia. The HRV will be evaluated after 20 min of the anesthetic block inst
Procedure/surgery
Other
E03.160
E04.525.210.105
Sponsors
Hospital Universitário Júluio Bandeira
Hospital Universitário Júluio Bandeira
Eligibility
Age
14 Years to 99 Years
Inclusion criteria
Inclusion criteria: Patients with physical status ASA I, II or III submitted to orthopedic surgical procedure of lower limbs under spinal anesthesia. By orientation and signature of the TCLE. Aged between 14 and 99 years. Sample : 60 patients.
Exclusion criteria
Exclusion criteria: Patients who use beta blockers or other drugs and conditions that alter the autonomic balance. Patients who refused to sign the EHIC. Patients with bleeding loss expected above 500 ml. General anesthesia, peripheral nerve blocks, epidural.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Expected outcome: higher incidence of arterial hypotension after spinal anesthesia in patients with low heart rate variability. Decreased HRV values after spinal anesthesia and low values at discharge.;Observed outcome: patients with low heart rate variability, measured by DFA and approximate entropy analysis, had a 20% higher incidence of perioperative hypotension. reduction in HRV values during the installation of spinal anesthesia and incomplete recovery at discharge, reflecting persistence of autonomic block even after recovery from motor function. | — |
Secondary
| Measure | Time frame |
|---|---|
| Expected outcome: hypotension in patients with low HRV at rest.;Observed outcome: 20% higher incidence of hypotension in patients with low HRV measured by DFA and approximate entropy. | — |
Countries
Brazil
Contacts
Public ContactHermes;Luiz Batista;Abreu
Hermes Melo Teixeira Batista;Faculdade de Medicina do ABC
Outcome results
None listed