surgery
Conditions
Interventions
Hypotensive group:NA
non-hypotensive group:NA
Sponsors
Taikang Xianlin Gulou Hospital
Eligibility
Sex/Gender
All
Age
18 Years to 65 Years
Inclusion criteria
Inclusion criteria: 1. Patients undergoing lower limb surgery under elective general anesthesia 2. ASA Grading I-II 3. 18-65 years old 4.15kg/m^2<BMI<30kg/m^2
Exclusion criteria
Exclusion criteria: 1. Acute deterioration of preoperative vital signs 2. Have a history of neck surgery or trauma 3. History of peripheral vascular disease or atherosclerosis 4. Non-sinus rhythm 5. Cardiomyopathy or heart valve disease 6. Left ventricular ejection fraction <50% 7. Patients with non-sinus rhythm 8. Patients with implanted pacemaker or cardioverter 7. Right ventricular dysfunction 8. Chronic obstructive pulmonary disease 9. Pulmonary hypertension 10. Chronic kidney disease 11. Secondary hypertension 12. Refusal of the patient to participate
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Systolic blood pressure, diastolic blood pressure, mean arterial pressure, heart rate;Variation in peak flow velocity of carotid artery; | — |
Secondary
| Measure | Time frame |
|---|---|
| The duration of tourniquet application, the dose of ephedrine, the dose of norepinephrine, the dose of atropine, the length of hospital stay after surgery, and the incidence of nausea and vomiting; | — |
Countries
China
Contacts
Public ContactTANG MENGCHEN
Taikang Xianlin Gulou Hospital
Outcome results
None listed