Abstract
Propofol is a short-acting, intravenously administered hypnotic agent which is used in procedural sedation in children. Propofol is known to decrease systemic vascular resistance, arterial blood pressure and can lead to desaturations and decreased systemic perfusion in children with cardiac shunting. This may result in a reduction in cerebral blood flow and oxygenation. Near-infrared spectroscopy (NIRS) can monitor cerebral tissue oxygenation in the frontal neocortex. The objective of our study was to measure the changes in cerebral oxygen and blood supply after Propofol infusion in children with congenital heart disease. Propofol infusion may reduce cerebral oxygenation in children with congenital heart disease. The study group consisted of 32 children (f:m = 18:14), with median age of 49 (5–112) months and median weight of 15 (5–34) kg. We performed NIRS derived continuous measurement of cerebral oxygenation and cardiac output using Electrical velocimetry for 5 min before and after sedation with Propofol (1–2 mg/kg i.v.) for cardiac catheterization. Simultaneously, non-invasive arterial blood pressure and transcutaneous oxygen saturation were measured. Propofol sedation led to a significant decrease in mean arterial pressure (79 ± 16 vs. 67 ± 12 mmHg) (p = 0.01) and cardiac index (3.2 ± 0.8 vs. 2.9 ± 0.6 ml/min/m2) (p = 0.03). In contrast, cerebral tissue oxygenation index, increased significantly from 57 ± 11 to 59 ± 10 % (p < 0.05). Sedation with Propofol increased cerebral tissue oxygenation despite a decrease in cardiac index and arterial blood pressure. This may be caused by a decreased oxygen consumption of the sedated brain with intact cerebral auto-regulation.
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Abbreviations
- CBF:
-
Cerebral blood flow
- CBV:
-
Cerebral blood volume
- CHD:
-
Congenital heart defect
- CO:
-
Cardiac output
- CI:
-
Cardiac index
- CPA:
-
Cerebral pressure autoregulation
- deoxyHb:
-
Deoxygenated hemoglobin
- HbD:
-
Hemoglobin difference
- NIRS:
-
Near-infrared spectroscopy
- O2Hb:
-
Oxygenated hemoglobin
- cHb:
-
Total hemoglobin
- THI:
-
Tissue hemoglobin index
- TOI:
-
Tissue oxygenation index
- SV:
-
Stroke volume
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Acknowledgments
We thank Anne Gale for editorial assistance and Roya Modabber-Sartipi for support as a study nurse.
Funding
We received no support from extramural sources for this study.
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None
Ethical Standards
The study was approved by the local ethics committee and written informed consent was given by the children’s parents.
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Nicole Nagdyman and Felix Berger are shared last authorship.
The work was performed at the Department of Congenital Heart Disease/Pediatric Cardiology, Deutsches Herzzentrum Berlin.
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Fleck, T., Schubert, S., Ewert, P. et al. Propofol Effect on Cerebral Oxygenation in Children with Congenital Heart Disease. Pediatr Cardiol 36, 543–549 (2015). https://doi.org/10.1007/s00246-014-1047-7
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DOI: https://doi.org/10.1007/s00246-014-1047-7