Hypotension Clinical Trial
Official title:
Observational Study on Monitoring of Systemic or Organ Blood Circulation and Perfusion for Preterm Infants
To investigate biomarker reflects systemic or specific organ perfusion well, we are going to the observational comparison study using several hemodynamic monitoring methods in the premature infants. It includes near-infrared spectroscopy (NIRS), pulse oximetry with perfusion index (PI) and pleth variability index (PVI) and functional echocardiography.
Hemodynamic observational comparisons will be performed in 6 episodes below on each patient.
1. first 24 hours after birth
2. during red blood cell (RBC) transfusion: from 4 hours before to 4 hours after the
transfusion
3. suspicion of necrotizing enterocolitis: from the suspicion point for 48 hours
4. suspicion of sepsis: from the suspicion point for 48 hours
5. oligouria (< 1 mL/kg/hour of urine): for 48 hours
6. hypotension (mean blood pressure < 30 mmHg): for 48 hours
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