Related Experiment Videos
Immune dysfunction in children after corrective surgery for congenital heart disease
G J Hauser1, M M Chan, W F Casey
1Department of Critical Care Medicine, Georgetown University Children's Medical Center, Washington, DC 20007.
Insights
Pediatric cardiac surgery impacts immune status, especially after open-heart procedures. Immune suppression was observed in children undergoing both open- and closed-heart surgeries, with more significant effects noted in open-heart cases.
Area of Science:
- Immunology
- Pediatric Cardiology
- Surgical Outcomes
Background:
- Congenital heart disease necessitates surgical intervention in infants and children.
- Cardiac surgery can potentially impact the developing immune system.
- Understanding immune status changes is crucial for patient recovery and management.
Purpose of the Study:
- To investigate the effects of open- and closed-heart surgery on the immune status of pediatric patients.
- To compare the immunological responses following different types of cardiac surgical procedures.
Main Methods:
- Prospective study design involving 31 pediatric patients (3 months to 12 years) undergoing surgery for congenital heart disease.
- Immune parameters were assessed preoperatively and at 2 and 24 hours post-surgery.
- Key immune markers included neutrophil counts, lymphocyte subsets (T3+, T4+, T8+), complement components (C3, C4), and immunoglobulins (IgG, IgM, IgA).
Main Results:
- Both open- and closed-heart surgeries led to increased neutrophil counts and lymphopenia.
- Open-heart surgery significantly decreased serum complement (C3, C4) and immunoglobulin (IgG, IgM) levels, and reduced T3+ and T4+ lymphocyte percentages and proliferative responses.
- Closed-heart surgery did not affect complement levels, and T8+ lymphocytes and IgA remained unchanged post-surgery.
- No correlation was found between intraoperative variables or postoperative severity of illness and immune suppression.
Conclusions:
- Pediatric cardiac surgery, particularly open-heart procedures, demonstrably affects the immune system.
- The observed immune alterations suggest a need for careful monitoring and potential supportive strategies in pediatric patients post-cardiac surgery.
Objective:
To study the effect of open- and closed-heart surgery on the immune status of infants and children.
Design:
Prospective study. Data collected before anesthesia and surgery and 2 and 24 hrs after surgery.
Setting:
Operating room and pediatric ICU in a children's hospital.
Patients:
Children undergoing surgery for correction of congenital heart disease (age 3 months to 12 yrs). A total of 31 patients were studied (open-heart surgery, n = 25; closed-heart surgery, n = 6).
Measurements And Main Results:
Increased neutrophil counts and lymphopenia were observed after both open- and closed-heart surgery. Serum levels of the complement components C3 and C4 were depressed after open-heart surgery, but not after closed procedures. The percentage of T3+ and T4+ lymphocytes, proliferative responses of the lymphocytes and serum immunoglobulin (Ig)G and IgM were decreased from preoperative levels after open-heart surgery. The percentage of T8+ lymphocytes and serum IgA levels did not change. Intraoperative variables and postoperative severity of illness (Pediatric Risk of Mortality score) did not correlate with immune suppression.
Conclusions:
The immune system is affected after pediatric cardiac surgery, particularly after open-heart surgery.