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ID
Source
Brief title
Health condition
Anesthesiology;thoracic impedance cardiography derived cardiac outpout; pleth variability index
Anesthesie; cardiac output afgeleid van thoracale impedantie cardiografie; pleth variabiliteitsindex
Sponsors and support
Intervention
Outcome measures
Primary outcome
The main study endpoint is the agreement of COqCO with reference CO in terms of bias, precision and trending ability. The change in RPVI will be assessed with respect to changes in SVV, to evaluate the ability of RPVI to track fluid-induced changes in preload dependency.
Secondary outcome
- Analysis of the variability of qCO derived CO during the different hypnotic conditions of the patient (awake, anaesthetic induction phase, steady state general anaesthesia).
- Comparison of the prediction of fluid responsiveness by RPVI with both FloTrac/EV1000-derived SVV and traditional PVI.
- Ability of RPVI to predict fluid responsiveness, defined as an increase in CO > 15%, and comparing it with the ability of SVV to predict fluid responsiveness.
Background summary
Technologic advances allow cardiac output (CO) to be monitored completely noninvasively using impendance cardiography (COqCO). Also, cardiac preload dependency can be assessed noninvasively using variations in plethysmography (RPVI). In patients under general anaesthesia in whom fluid is administered, the agreement of COqCO with clinical reference CO values is unknown, as well the ability of RPVI to assess changes in preload dependency.
Study objective
To assess the agreement of COqCO with reference CO values in patients under general anaesthesia in whom fluid is administered, as well as to study the influence of fluid administration on the ability of RPVI to reflect preload dependency.
Study design
From start of induction of anesthesia until end of surgery.
Intervention
After induction of anaesthesia and once a steady state haemodynamic phase has been reached before incision, all patients will be administered 5ml kg-1 crystalloids i.v. in 5-10 minutes. The haemodynamic response will be evaluated by measuring COqCO, RPVI and the respective reference values, i.e. FloTrac/EV1000 TM derived CO and stroke volume variation (SVV), respectively.
Inclusion criteria
• Patients scheduled for elective non-cardiac surgery requiring invasive arterial blood pressure monitoring.
• Patients older than 18.
• ASA physical status I-III.
• Informed and willing to give written informed consent.
Exclusion criteria
• Patients who refuse to participate.
• Patients unable to consent (i.e. severe mental disorder, younger than 18).
• Patients with pacemakers.
• Patients with severe cardiac pathologies or hemodynamically unstable.
• Patients with end-stage renal failure.
Design
Recruitment
IPD sharing statement
Followed up by the following (possibly more current) registration
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Other (possibly less up-to-date) registrations in this register
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In other registers
| Register | ID |
|---|---|
| NTR-new | NL6852 |
| NTR-old | NTR7030 |
| Other | UMCG Research Register : 201800142 |