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非洲儿童输血的告知阈值:开展一项试验的必要性。

Informing thresholds for paediatric transfusion in Africa: the need for a trial.

作者信息

Maitland Kathryn, Ohuma Eric O, Mpoya Ayub, Uyoga Sophie, Hassall Oliver, Williams Thomas N

机构信息

Department of Medicine, Imperial College London, London, W2 1PG, UK.

Clinical Trials Facility, KEMRI-Wellcome Trust Research Programme, Kilifi, PO Box 230, Kenya.

出版信息

Wellcome Open Res. 2019 Aug 12;4:27. doi: 10.12688/wellcomeopenres.15003.2. eCollection 2019.

Abstract

: Owing to inadequate supplies of donor blood for transfusion in sub-Saharan Africa (sSA) World Health Organization paediatric guidelines recommend restrictive transfusion practices, based on expert opinion. We examined whether survival amongst hospitalised children by admission haemoglobin and whether this was influenced by malaria infection and/or transfusion. : A retrospective analysis of standardised clinical digital records in an unselected population of children admitted to a rural hospital in Kenya over an 8-year period. We describe baseline parameters with respect to categories of anaemia and outcome (in-hospital death) by haemoglobin (Hb), malaria and transfusion status. : Among 29,226 children, 1,143 (3.9%) had profound anaemia (Hb <4g/dl) and 3,469 (11.9%) had severe anaemia (Hb 4-6g/d). In-hospital mortality rate was 97/1,143 (8.5%) if Hb<4g/dl or 164/2,326 (7.1%) in those with severe anaemia (Hb ≥4.0-<6g/dl). Admission Hb <3g/dl was associated with higher risk of death versus those with higher Hbs (OR=2.41 (95%CI: 1.8 - 3.24; P<0.001), increasing to OR=6.36, (95%CI: 4.21-9.62; P<0.001) in malaria positive children. Conversely, mortality in non-malaria admissions was unrelated to Hb level. Transfusion was associated with a non-significant improvement in outcome if Hb<3g/dl (malaria-only) OR 0.72 (95%CI 0.29 - 1.78), albeit the number of cases were too few to show a statistical difference. For those with Hb levels above 4g/dl, mortality was significantly higher in those receiving a transfusion compared to the non-transfused group. For non-malarial cases, transfusion did not affect survival-status, irrespective of baseline Hb level compared to children who were not transfused at higher Hb levels. : Although severe anaemia is common among children admitted to hospital in sSA (~16%), our data do not indicate that outcome is improved by transfusion irrespective of malaria status. Given the limitations of observational studies, clinical trials investigating the role of transfusion in outcomes in children with severe anaemia are warranted.

摘要

由于撒哈拉以南非洲地区(SSA)用于输血的供血不足,世界卫生组织的儿科指南基于专家意见推荐采取限制性输血措施。我们研究了住院儿童的生存情况与入院时血红蛋白水平的关系,以及这是否受到疟疾感染和/或输血的影响。

对肯尼亚一家农村医院8年间收治的未经过筛选的儿童群体的标准化临床数字记录进行回顾性分析。我们按贫血类别、结局(院内死亡)描述了血红蛋白(Hb)、疟疾和输血状况的基线参数。

在29226名儿童中,1143名(3.9%)患有严重贫血(Hb<4g/dl),3469名(11.9%)患有重度贫血(Hb 4 - 6g/d)。如果Hb<4g/dl,院内死亡率为97/1143(8.5%);在重度贫血(Hb≥4.0 - <6g/dl)的儿童中,死亡率为164/2326(7.1%)。与血红蛋白水平较高的儿童相比,入院时Hb<3g/dl的儿童死亡风险更高(OR = 2.41(95%CI:1.8 - 3.24;P<0.001),在疟疾阳性儿童中增至OR = 6.36,(95%CI:4.21 - 9.62;P<0.001)。相反,非疟疾入院儿童的死亡率与Hb水平无关。如果Hb<3g/dl(仅疟疾),输血与结局的改善无显著关联(OR 0.72(95%CI 0.29 - 1.78)),尽管病例数太少无法显示出统计学差异。对于Hb水平高于4g/dl的儿童,接受输血的儿童死亡率显著高于未输血组。对于非疟疾病例,与未输血的儿童相比,无论基线Hb水平如何,输血均不影响生存状况。

尽管在SSA地区住院儿童中重度贫血很常见(约16%),但我们的数据并未表明无论疟疾状况如何,输血都能改善结局。鉴于观察性研究的局限性,有必要开展临床试验来研究输血在重度贫血儿童结局中的作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4054/6784879/5caf676cdffa/wellcomeopenres-4-16831-g0000.jpg

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