Hypovolemia
Conditions
Interventions
Gold Standard:The gold standard of this study is stroke volume(SV) derived from transthoracic echocardiography. Increase in SV>10% after fluid therapy——10ml/Kg normal saline infusion, is considered as
flow 
(aFTc) 
by 
ultrasound,aortic 
time(vFTc) 
from 
transthoracic 
Sponsors
Shenzhen University General Hospital
Eligibility
Sex/Gender
All
Age
No minimum to 12 Years
Inclusion criteria
Inclusion criteria: Children aged < 12 years, undergoing a surgical procedure requiring general anesthesia and controlled ventilation with an ASA physical status class of I-III will be consented for the entry into the study. Informed consent from patients' caregiver will be obtained before inclusion.
Exclusion criteria
Exclusion criteria: Exclusion criteria are known congenital heart disease, rhythm other than sinus, carotid artery stenosis, kidney disease. Patients require receiving vasoactive agents will also be excluded from the study.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Carotid artery corrected flow time (aFTc); | — |
Secondary
| Measure | Time frame |
|---|---|
| Aortic valve corrected flow time (vFTc); | — |
Countries
China
Contacts
Public ContactWang Miao
Shenzhen University General Hospital
Outcome results
None listed