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

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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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