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Restrictive versus liberal red blood cell transfusion thresholds in very low birth weight infants: a systematic
Masitah Ibrahim1, Selina Kah Ying Ho, Cheo Lian Yeo
1Department of Neonatal and Developmental Medicine, Singapore General Hospital, Singapore.
Insights
Restrictive red blood cell (RBC) transfusion thresholds for very low birth weight (VLBW) infants reduce transfusions and donor exposure without increasing death or major morbidities. This approach is safe for VLBW infants.
Area of Science:
- Neonatal Medicine
- Pediatric Hematology
- Clinical Trials
Background:
- Very low birth weight (VLBW) infants often require red blood cell (RBC) transfusions.
- Transfusion practices vary, with ongoing debate regarding restrictive versus liberal thresholds.
- Optimizing transfusion strategies is crucial for improving VLBW infant outcomes.
Purpose of the Study:
- To systematically review the effects of restrictive versus liberal RBC transfusion thresholds.
- To evaluate the impact on clinically important outcomes in VLBW infants.
Main Methods:
- Systematic review of randomized controlled trials (RCTs) identified through comprehensive database searches.
- Inclusion criteria focused on VLBW infants and specific clinical outcomes (e.g., death, brain injury, retinopathy of prematurity, bronchopulmonary dysplasia, necrotizing enterocolitis).
- Two independent reviewers assessed study eligibility, risk of bias, and performed data extraction and analysis using RevMan 5.
Main Results:
- Six RCTs were identified; two trials with adequate methodology were pooled.
- The restrictive transfusion group received significantly fewer RBC transfusions per infant (MD -1.35) and had a lower donor exposure rate (MD -0.54).
- No statistically significant differences were observed for other major short-term neonatal morbidities or death.
Conclusions:
- Restrictive RBC transfusion thresholds can be safely implemented in VLBW infants.
- This strategy reduces transfusion burden and donor exposure.
- Clinically important increases in the risk of death or major short-term morbidities were not observed with restrictive thresholds.
Aim:
A systematic review was conducted to examine the effects of restrictive versus liberal red blood cell (RBC) transfusion thresholds on clinically important outcomes in very low birth weight (VLBW) infants.
Methods:
Randomised controlled trials (RCTs) of varying RBC transfusion thresholds in VLBW infants were identified by searching MEDLINE, EMBASE, CINAHL, all of the Cochrane Library and other supplementary sources. Selected studies included one of the following outcomes: total number of red blood cell transfusions, donor exposure rate, cranial ultrasonographically diagnosed brain injury, retinopathy of prematurity, bronchopulmonary dysplasia, necrotising enterocolitis or death. Studies to be included were selected by two reviewers who also assessed the risk of bias of each trial. Data extraction and analyses were independently performed by two reviewers. All data were analysed using RevMan 5.
Results:
Six RCTs were identified. One trial did not meet the inclusion criteria, while two had inadequate methodological quality. Pooled analysis of two trials showed that the restrictive transfusion group received a significantly lower mean number of transfusions per infant (mean difference (MD) -1.35, 95% confidence interval (CI) [-2.61, -0.09]) and donor exposure rate (MD -0.54, 95% CI [-0.93, -0.15]). No other statistically significant differences were observed.
Conclusion:
Restrictive RBC transfusion thresholds in VLBW infants may be utilised without incurring clinically important increases in the risk of death or major short-term neonatal morbidities.
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