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Beneficial effect of blood transfusion in children with sickle cell chest syndrome
1Department of Pediatrics, Dhahran (Saudi Arabia) Health Center.
Insights
Acute chest syndrome (ACS) in children with sickle cell disease is primarily caused by vascular occlusion, not bacterial infection. Early blood transfusions significantly improve patient outcomes and reduce mortality.
Area of Science:
- Pediatric Hematology
- Pulmonology
- Sickle Cell Disease Research
Background:
- Historically, acute chest syndrome (ACS) in pediatric sickle cell disease (SCD) was attributed to bacterial infections.
- Recent evidence suggests vascular occlusion is the primary pathology, challenging earlier assumptions.
Purpose of the Study:
- To investigate the primary cause of acute chest syndrome (ACS) in children with sickle cell disease (SCD).
- To evaluate the efficacy of early blood transfusion in managing ACS episodes in pediatric SCD patients.
Main Methods:
- Retrospective analysis of 32 episodes of ACS in children with SCD.
- Assessment of bacterial and mycoplasma infection prevalence.
- Comparison of outcomes between early and late blood transfusion groups.
Main Results:
- Bacterial infection was confirmed in only 3% of ACS episodes; mycoplasma was suspected in 13%.
- Patients receiving early blood transfusions (within 24 hours) showed dramatic clinical and radiographic improvement.
- Patients not receiving early transfusions experienced deterioration, with delayed transfusions leading to slower recovery or worsening conditions.
Conclusions:
- Vascular occlusion is likely the predominant cause of ACS in pediatric SCD.
- Early blood transfusion is a valuable intervention for shortening ACS duration and reducing mortality in children with SCD.
- Packed red blood cell transfusion is suitable for sickle cell dilution in patients with low hemoglobin levels.
Abstract:
Reports in the 1970s suggested that acute chest syndrome (ACS) in children with sickle cell disease is usually due to bacterial infection. Studies in adults and more recently in children, however, showed that proved bacterial infection occurs in a minority of these patients and that vascular occlusion is the main pathologic process. In a retrospective study of 32 episodes of ACS in children, a definite bacterial infection was found in 3% (one patient), possible bacterial infection in 11% (four patients), and a possible mycoplasma in 13% (five patients). With the intent to dilute sickle cells, 23 patients received blood transfusion within 24 hours after hospital admission; all showed a dramatic clinical and roentgenographic improvement. Of the nine patients who did not receive a transfusion after hospital admission, the conditions of five patients deteriorated but improved after "late" transfusion; three patients showed slow improvement, and only one patient improved within 48 hours. From this we conclude that vascular occlusion might be the main process in ACS and that early blood transfusion may be valuable in shortening the course and decreasing mortality. The low hemoglobin value at presentation in our patients makes dilution of sickle cells possible by packed red blood cell transfusion rather than exchange transfusion.