■量化当前销售的婴儿床保险杠(CB)中的呼吸受损,网垫(MLs)和替代产品(ALTs)用于减弱婴儿和婴儿床侧面之间的相互作用,并阐明呼吸受损和渗透性之间的关系。
■我们通过实验量化了通过婴儿人体模型的二氧化碳再呼吸(CO2RB)和通过先前发布的测试方案的透气性,在市售的CB中,MLs和ALT。
■ML中CO2RB的差异(中位数[m]=8.2%,第25百分位数[P25]=6.8,第75百分位数[P75]=8.6),ALT(m=10.5%,P25=9.8,P75=10.7)和CB(m=11.6%,P25=10.2,P75=14.3)是显著的(p<0.0001)。为了比较,用安抚奶嘴进行的人体模型测试产生的CO2RB为5.6%-5.9%,覆盖在面部/躯干上的毯子产生的CO2RB为7.7%-8.6%,各种位置的毛绒动物产生的CO2RB为6.1%至16.1%。ML之间的渗透率差异(m=529.5立方英尺/分钟[CFM],P25=460,P75=747.5),ALT(m=29.0CFM,P25=27.7,P75=37.7)和CB(m=46.6CFM,P25=30.1,P75=58.7)组显著(p<0.0001)。CO2RB与透气性相关性较差(maxR2=0.36)。在测试的子集中,CBCO2RB随着穿透力的增加而增加50%-80%,而MLCO2RB名义上没有变化。
■政府机构和标准组织目前正在考虑对包括CB在内的床上用品进行监管。由于在制定此类法规时咨询了儿科医生,我们的发现,即渗透性本身是CO2RB的较差预测指标,应该考虑。
UNASSIGNED: Quantify impaired respiration in currently marketed
crib bumpers (CBs), mesh liners (MLs) and alternative products (ALTs) used to attenuate the interaction between the baby and the
crib sides and elucidate the relationship between impaired respiration and permeability.
UNASSIGNED: We experimentally quantified carbon dioxide rebreathing (CO2RB) via an infant manikin and air permeability via previously published test protocols, in commercially available CBs, MLs and ALTs.
UNASSIGNED: Differences in CO2RB in ML (median [m]=8.2%, 25th percentile [P25]=6.8, 75th percentile [P75]=8.6), ALT (m=10.5%, P25=9.8, P75=10.7) and CB (m=11.6%, P25=10.2, P75=14.3) were significant (p<0.0001). For comparison, manikin tests with a pacifier yielded CO2RB of 5.6%-5.9%, blanket draped over the face/torso yielded CO2RB of 7.7%-8.6% and stuffed animal in various positions yielded CO2RB from 6.1% to 16.1%. Differences in permeability between ML (m=529.5 cubic feet per minute [CFM], P25=460, P75=747.5), ALT (m=29.0 CFM, P25=27.7, P75=37.7) and CB (m=46.6 CFM, P25=30.1, P75=58.7) groups were significant (p<0.0001). CO2RB was poorly correlated with air permeability (max R2=0.36). In a subset of tests, CB CO2RB increased by 50%-80% with increasing penetration force, whereas the ML CO2RB was nominally unchanged.
UNASSIGNED: Government agencies and standards organisations are presently considering regulation of bedding including CBs. As paediatricians are consulted in the development of such regulations, our findings that permeability by itself was a poor predictor of CO2RB should be considered.