日本未熟児新生児学会雑誌 23(1):101-107;2011 印刷する
日本未熟児新生児学会雑誌 第23巻 第1号 101~107頁(2011年)
受付日:平成22.04.05
受理日:平成22.07.20
極低出生体重児における青色発光ダイオードによる光線療法の治療効果に関する検討
Effect of Blue Light-emitting Diode Phototherapy in Very Low Birth Weight Infants with Neonatal Hyperbilirubinemia
愛知県厚生連海南病院 小児科
Department of Pediatrics, Kainan Hospital
山田崇春・篠原 務・浜田実邦・小久保 稔・一木 貴
Takaharu YAMADA,Tsutomu SHINOHARA,Miho HAMADA,Minoru KOKUBO, Takashi ICHIKI
Key Words:light emitting diode,phototherapy,total serum bilirubin,very low birth weight infant
 青色発光ダイオード(LED)は,新しい光線療法の光源として使用されてきているが,早期産児や極低出生体重児に対する治療効果を明らかにした報告は少ない。今回我々は,当院で光線療法を受けた極低出生体重児42例を対象に,LEDと従来の蛍光管による光線療法の治療効果について後方視的に比較検討した。総血清ビリルビン値(TSB)の変化量(TSB治療前-TSB治療後),照射時間あたりの変化量,TSB変化率(TSB変化量/TSB治療前×100),照射時間あたりの変化率のいずれもLED群(n=16)が蛍光管群(n=26)に比較して有意に高値を示した。LEDは,極低出生体重児においても蛍光管に比べて有意に高い治療効果を得られることが示唆された。今後は,短期的な治療効果のみならず,長期的予後に与える影響についても検討が必要である。
 We sought to compare the efficacy of blue light-emitting diode(LED)phototherapy with fluorescent tube(FT) phototherapy for the treatment of neonatal hyperbilirubinemia in very low birth weight(VLBW)infants.
 16 hyperbilirubinemic neonates treated with LED(high mode)phototherapy and 26 neonates treated with FT phototherapy were retrospectively compared.
 Phototherapy was provided from 40cm above their bed when their total serum bilirubin(TSB)levels exceeded the Murata’s criteria. The data on TSB were collected retrospectively by referring to the clinical laboratory records.
 The clinical backgrounds and biochemical variables of the two groups did not differ. The mean total serum bilirubin (TSB)concentrations at initiation of treatment did not differ among the two groups. At termination of treatment, the mean TSB level in the LED group was significantly lower than in the FT group(5.6±1.8mg/dL vs. 6.8±1.5mg/dL). The LED group had higher ΔTSB(TSB before−TSB after therapy)levels compared to the FT group(4.2±1.5mg/dL vs. 3.0±1.3mg/dL),higher ratio of reduction in TSB〔(ΔTSB/TSB before therapy)×100〕(41.8±13.5% vs. 29.6±11.7%), higher rate of decrease in TSB〔ΔTSB/time(hr)〕(0.17±0.07mg/dL/hr vs. 0.13±0.06mg/dL/hr)and higher rate of decrease in their ratio of reduction in TSB〔(ΔTSB/TSB before therapy)×100/time(hr)〕(1.68±0.52%/hr vs. 1.26±0.58%/hr), respectively.
 We demonstrated that blue LED phototherapy was more effective than conventional FT phototherapy in VLBW infants with neonatal hyperbilirubinemia. Furthermore, long-term follow-up assessment is needed in VLBW infants with neonatal hyperbilirubinemia.
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