Abstract
Red blood cell transfusion can improve but also might temporarily reduce the microcirculation. The buccal microcirculation was visualized and total vessel density (TVD) determined with sidestream dark field imaging in 19 pediatric anemic (Hb 7.2 g/dL, 95 % CI 6.5–7.9) oncology or hematology patients receiving red blood cell transfusions (Tx) and in 18 age-matched healthy non-anemic controls. After transfusion, Hb (8.0 g/dL, 95 % CI 7.3–8.6) and TVD increased (14.7 ± 1.7 versus 16.6 ± 2.0 mm/mm2) significantly with a concomitant decrease in RBC velocity in medium-sized vessels (pre-Tx 711 ± 199 versus post-Tx 627 ± 163 μm/s). Compared to the controls, pre-Tx TVD (17.5 ± 1.3 mm/mm2) was lower and RBC velocity (476 ± 77 μm/s) was significantly higher. After transfusion, TVD and RBC velocity remained significantly lower and higher, respectively. In a subgroup, analysis of the transfused children with infection of TVD at baseline was lower with a larger increase after transfusion compared to anemic children without infection (ΔTVD 3.4 ± 2.6 versus ΔTVD 1.3 ± 1.5 mm/mm2).
Conclusion: With the rise of hemoglobin after transfusion, significant improvements of tissue perfusion were demonstrated but differences to non-anemic controls persisted. In particular, the microcirculation of anemic oncology patients with infection improved after transfusion.
What is Known: • Transfusions can improve but also temporarily reduce the microcirculation. • In neonates, transfusion significantly increases total vessel density. |
What is New: • Pretransfusion, the microcirculation of the anemic children differed significantly from the controls. • After transfusion, the microcirculation improved but still differed from the controls. • These changes were most profound in anemic patients with concurrent infection, therefore transfusion threshholds might need to be higher. |
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Abbreviations
- CG:
-
Control group
- InfGroup:
-
Anemic group with infections
- nInfGroup:
-
Anemic group without infections
- LED:
-
Light-emitting diode
- pre-Tx:
-
Before transfusion
- pTx1:
-
After transfusion
- pTx2:
-
48–72 h after transfusion
- TVD:
-
Total vessel density
- RBC Tx:
-
Red blood cell transfusion
- SDF:
-
Sidestream dark field
- Tx G:
-
Transfusion group
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Contributions
C. M. Schinagl recruited the patients, obtained the images, collected and analyzed the data, and wrote the first draft.
Z. H. Mormanova and I. Schmid were involved in planning the study; in addition, Z.M was very important in adapting the method to children.
A. Puchwein-Schwepcke was integral in writing the manuscript and establishing the method.
O. Genzel-Boroviczény planned the study and wrote the final manuscript.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments. All parents of the patients gave informed consent.
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No financial assistance was received in support of this study; no conflict of interest to report from any of the authors; and no honorarium, grant, or other payment was given to anybody to produce the manuscript.
C. Schinagl declares no conflict of interest. Z. Mormanova declares no conflict of interest. A. Puchwein-Schwepcke declares no conflict of interest. I. Schmid declares no conflict of interest. O. Genzel-Boroviczeny declares no conflict of interest.
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Communicated by David Nadal
Revisions received: 11 November 2015; 2 January 2016 (2)
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Schinagl, C.M., Mormanova, Z.H., Puchwein-Schwepcke, A. et al. The effect of red blood cell transfusion on the microcirculation of anemic children. Eur J Pediatr 175, 793–798 (2016). https://doi.org/10.1007/s00431-016-2704-z
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DOI: https://doi.org/10.1007/s00431-016-2704-z