研究のタイプ: 医学/生物学の研究 (experimental study)

[健康なボランティアの心拍変動パラメータに対する携帯電話の通話数の影響] med./bio.

The influence of the call with a mobile phone on heart rate variability parameters in healthy volunteers.

掲載誌: Ind Health 2008; 46 (4): 409-417

この研究は、健康若者心拍変動(HRV)に対する携帯電話での通話の影響を推定するための実験を行った。時間および周波数領域のHRV分析を実行して、安静時の正常な心電図(ECG)と心エコー図を持つ32人の健康な学生の被験者群での交感神経バランスの変化を評価した。周波数領域では、ULF、VLF、LF、HFの各パワーおよびLF / HF比を算出した。ECGホルター計によるモニタリングは、午前8時から9時まで(座位)の記録、電話の使用時に、電話の前(期間I)、携帯電話での通話中(期間II))、電話の後(期間III)の20分間の記録を行った。その結果、20分の通話中、時間領域パラメータは有意に増加した;また通話中にVLF、LF、HF帯域のパワーは最も高くなり、LF / HF比は最も低くなった;心拍変動の分析により間接的に測定された副交感神経系緊張は、通話中に高まったが、交感神経系緊張は低下した;携帯電話での通話中の心拍変動の変化は電磁界の影響を受ける可能性があるが、会話の影響を排除することはできなかった、と報告している。

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研究目的(著者による)

The aim of this study was to estimate the influence of the call with a mobile phone on heart rate variability in young healthy people.

詳細情報

32 healthy students (18 women and 14 men) with normal electrocardiogram and echocardiogram at rest participated. ECG recordings were performed on sitting subject in a semi-darkened, quiet room between 8:00 and 9:00 in the morning.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 1,800 MHz
Modulation type: pulsed
ばく露時間: continuous for 20 min
  • SAR: 0.48 W/kg maximum (10 g) (tested by the manufacturer)

ばく露1

主たる特性
周波数 1,800 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 20 min
Modulation
Modulation type pulsed
Additional information

GSM

ばく露装置
ばく露の発生源/構造
  • セルラ-電話
  • GSM
チャンバの詳細 semi-darkened, temperature-controlled quiet laboratory at room temperature (21°C)
ばく露装置の詳細 The GSM mobile phone was held in the right hand during the call. It was switched on during the whole time of the experiment so that the effect of logging into the mobile phone network on the maximal emission of EMF could be avoided.
Additional information Recordings were made over three 20 min periods, i.e., before, during, and after the telephone call.
パラメータ
測定量 種別 Method Mass 備考
SAR 0.48 W/kg maximum 測定値 10 g tested by the manufacturer

ばく露を受けた生物:

方法 影響評価項目/測定パラメータ/方法

研究対象とした生物試料:
研究対象とした臓器系:
調査の時期:
  • ばく露前
  • ばく露中
  • ばく露後

研究の主なアウトカム(著者による)

There were no statistically significant changes in mean, maximal and minimal heart rate neither in men nor in women. Time domain analysis parameters such as "standard deviation of all normal sinus RR intervals" and "standard deviation of the averaged normal sinus RR intervals for all 5-mm segments" were significantly increased during mobile phone exposure. Frequency domain analysis revealed statistically significant increase in very low frequency and low frequency power in women and in high frequency power in both genders. Statistically significant decreased low frequency/high frequency ratio was observed in exposed women.
These results suggest that the parasympathetic tone was increased while sympathetic tone was lowered during mobile phone exposure. The authors conclude that the observed changes in heart rate variability could be affected by electromagnetic field but the influence of speaking cannot be excluded.

研究の種別:

研究助成

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