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Atelectasis in children undergoing either propofol infusion or positive pressure ventilation anesthesia for magnetic
Goetz Lutterbey1, Mike P Wattjes, Dorothea Doerr
1Department of Radiology, University of Bonn, Bonn, Germany. goetz.lutterbey@ukb.uni-bonn.de
Insights
Propofol infusion (PI) anesthesia caused less lung atelectasis in children during MRI scans compared to positive pressure ventilation (PPV). PI provides better motionlessness for pediatric MRI quality.
Area of Science:
- Anesthesiology
- Pediatric Imaging
- Pulmonary Medicine
Background:
- Anesthesia-induced atelectasis is a known complication in pediatric patients.
- The choice of anesthetic technique may influence the development and severity of atelectasis.
- Magnetic resonance imaging (MRI) requires patient immobility, making atelectasis a concern for image quality.
Purpose of the Study:
- To compare the extent of atelectasis in children undergoing MRI with two different anesthetic techniques.
- To evaluate the impact of anesthetic method on lung collapse during pediatric MRI.
- To determine if propofol infusion (PI) is associated with less atelectasis than positive pressure ventilation (PPV).
Main Methods:
- Children undergoing MRI received either intravenous propofol infusion (PI) without an artificial airway or positive pressure ventilation (PPV) via a tracheal tube.
- Lung imaging sequences were performed at the start and end of anesthesia to assess atelectasis.
- The extent of atelectasis was quantitatively scored by two independent radiologists.
Main Results:
- While initial atelectasis rates differed (42% PI vs. 80% PPV), both groups showed high rates by the second scan (82% PI vs. 94% PPV).
- The severity of atelectasis was greater in the positive pressure ventilation group.
- Younger children exhibited higher atelectasis scores, though oxygenation remained normal in all participants.
Conclusions:
- Propofol infusion anesthesia resulted in less extensive atelectasis compared to positive pressure ventilation in pediatric MRI.
- Propofol infusion facilitates the necessary motionlessness for high-quality diagnostic pediatric MRI.
- Anesthetic technique is a significant factor influencing atelectasis development during pediatric MRI.
Background:
Atelectasis because of anesthesia is a recognized problem but may be affected by the anesthetic technique. We compared magnetic resonance images of atelectasis in children undergoing two types of anesthesia.
Methods:
Children requiring anesthesia for magnetic resonance imaging (MRI) had additional lung imaging sequences at the beginning and the end of anesthesia. Children had either i.v. propofol infusion (PI) without an artificial airway (n = 26) or positive pressure ventilation (PPV) via a tracheal tube (n = 20); the technique was chosen for clinical reasons. The extent of atelectasis was scored by two independent radiologists.
Results:
The median ages (range) for PI and PPV groups were 45 months (1-77 months) and 18 months (2-74 months), respectively. The proportion of children with atelectasis was different in the first lung scan (42% vs 80%), but in the second scan atelectasis was seen frequently in both groups (82% vs 94%) with a greater extent in the PPV group. The atelectasis score was higher in young children, but all children had normal oxygen requirements and saturations.
Conclusions:
Many factors may influence the development of atelectasis but this study found less extensive atelectasis with PI than PPV. PI allows for sufficient motionlessness, required for high diagnostic image quality in pediatric MRI.
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