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Effect of backrest on central venous pressure in pediatric cardiac surgery
1Department of Thoracic Surgery, Taubman Health Center, University of Michigan, Ann Arbor.
Insights
Elevating a child's backrest to 30 degrees does not significantly alter central venous pressure (CVP) readings after cardiac surgery. This finding supports keeping pediatric patients in a comfortable, elevated position for monitoring right ventricular function.
Area of Science:
- Pediatric Cardiology
- Critical Care Medicine
- Cardiovascular Physiology
Background:
- Accurate monitoring of right ventricular function is vital in pediatric patients post-cardiac surgery.
- Central venous pressure (CVP) is a key indicator of right ventricular function.
- Supine positioning has traditionally been required for precise CVP measurements.
Purpose of the Study:
- To investigate the impact of backrest elevation on CVP readings in children after cardiac surgery.
- To determine if a 30-degree backrest elevation affects CVP accuracy.
- To inform clinical practice regarding patient positioning for CVP monitoring.
Main Methods:
- A study involving 40 pediatric patients (1 day to 9 years) who underwent cardiac surgery within 72 hours.
- Hourly CVP measurements were taken over 8 hours at both 0- and 30-degree backrest elevations.
- Data analysis to compare CVP readings between the two positions.
Main Results:
- Central venous pressure readings showed no significant alteration with a 30-degree backrest elevation.
- The findings indicate that backrest elevation does not compromise the accuracy of CVP measurements.
- This suggests that maintaining an elevated position is feasible for monitoring.
Conclusions:
- Pediatric patients can remain in a 30-degree elevated position for CVP readings post-cardiac surgery.
- This practice avoids the need to awaken and reposition children, enhancing comfort and safety.
- Maintaining a 30-degree elevation is beneficial for children requiring it for other medical reasons, such as feeding or respiratory support.
Abstract:
Following cardiac surgery in children, accurate monitoring of right ventricular function, as reflected by central venous pressure (CVP) or right atrial pressure, is crucial. Positioning the child supine has been considered necessary to achieve an accurate CVP reading. In this study the effect of backrest elevation on CVP readings in children following cardiac surgery was explored. The sample consisted of 40 children, 1 day to 9 years of age, who had undergone cardiac surgery within the previous 72 hours. CVP measurements at 0- and 30-degree backrest elevations were obtained hourly for 8 hours for each child. CVP readings were not significantly altered by the bedrest elevation. These findings suggest children may remain elevated for CVP readings rather than being awakened and repositioned to a 0-degree backrest elevation. For children who have nasogastric feedings, respiratory insufficiency, or increased intracranial pressure, a 30-degree backrest elevation may be maintained for the CVP reading, as well as for the children's safety and comfort.