Vichyanond Pakit, Visitsuntorn Nualanong, Ruengruk Sirirut, Malainual Nat
Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
J Med Assoc Thai. 2002 Aug;85 Suppl 2:S586-92.
Conflicting results exist with regard to the efficacy of vacuum cleaners on the removal of mite allergens from bedding.
The authors prospectively compared a short term efficacy of two types of regular vacuum cleaners (National-N and Hoover-H) with a specialized cleaner (Vorwerk-V) in the removal of mite allergens from mattresses.
Thirty-five dormitory beds with high mite allergen concentrations at the baseline period (month 0) were selected. They were matched into three groups according to group I mite allergen concentrations (N 11 beds, H 12 beds, V 12 beds). Vacuuming was performed on months 1 and 4 by the assigned vacuum cleaner in each group. Immediately after, mattresses were vacuumed by a reference cleaner (another National vacuum cleaner) at both months. Vacuuming was performed over the entire bed for 2 minutes/square meter. Group I mite allergens (sums of Der p 1 and Der f 1) were measured; concentrations and total mite allergens removed by the tested cleaners as well as by the reference cleaner, at various time points, were compared.
Ability to remove mite allergens by vacuum cleaners depends on weight of dust removed and also on mite concentrations in the dust samples. Despite the fact that H and V appeared to remove higher mite allergens than N, such differences were not statistically significant (p > 0.05), both at month 1, and 4. Surprisingly, mattress mite concentrations removed by both high capacity cleaner groups (V & H) increased at month 4, whereas, it remained unchanged in the third group (N). This increase led to a concomitant increase in total allergen removed by V and H. Nevertheless, remaining total allergens in the mattresses in V and H, as judged from the amount of allergens obtained by the reference cleaner, increased at month 1 and 4 compared to baseline values (p < 0.05), whereas, no change was observed in N.
Although high capacity vacuum cleaners removed a large amount of mite allergens from mattresses, they did not sufficiently reduce mattress mite allergen burden as determined by the reference cleaner during this short term study.
关于真空吸尘器清除床上用品中螨虫过敏原的功效，存在相互矛盾的结果。
作者前瞻性地比较了两种普通真空吸尘器（National-N和Hoover-H）与一种专用吸尘器（Vorwerk-V）在清除床垫上螨虫过敏原方面的短期功效。
选择了35张在基线期（第0个月）螨虫过敏原浓度较高的宿舍床。根据第一组螨虫过敏原浓度将它们匹配成三组（N组11张床，H组12张床，V组12张床）。每组在第1个月和第4个月由指定的真空吸尘器进行吸尘。之后，在这两个月里，床垫均由一台参考吸尘器（另一台National真空吸尘器）进行吸尘。吸尘时在整个床面以每平方米2分钟的速度进行。测量第一组螨虫过敏原（Der p 1和Der f 1的总和）；比较在不同时间点测试吸尘器以及参考吸尘器清除的过敏原浓度和总螨虫过敏原量。
真空吸尘器清除螨虫过敏原的能力取决于清除的灰尘重量以及灰尘样本中的螨虫浓度。尽管H和V似乎比N清除的螨虫过敏原更多，但在第1个月和第4个月，这些差异均无统计学意义（p>0.05）。令人惊讶的是，两个高容量吸尘器组（V和H）在第4个月清除的床垫螨虫浓度增加，而第三组（N）则保持不变。这种增加导致V和H清除的总过敏原随之增加。然而，根据参考吸尘器获得的过敏原量判断，V和H组床垫中剩余的总过敏原在第1个月和第4个月与基线值相比有所增加（p<0.05），而N组未观察到变化。
尽管高容量真空吸尘器从床垫上清除了大量螨虫过敏原，但在这项短期研究中，根据参考吸尘器的测定，它们并未充分减轻床垫螨虫过敏原负担。
