Mobile Phone Effects on Umbilical Artery Doppler and Heart Rate Tracing

The Effects of Mobile Phone on Umbilical Artery Doppler and Fetal Cardiotogogrphy in Normal and Gowth Restricted Fetuses

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT02445261

Enrollment

190

Registered

2015-05-15

Start date

2015-06-01

Completion date

2018-01-23

Last updated

2018-01-25

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Umbilical Artery Doppler, Fetal Heart Rate Tracing

Keywords

MOBILE PHONE ON AND IN AND, UMBILICAL ARTERY DOPPLER, FETAL CARDIOTOCOGRAPHY, GROWTH RESTRICTED FETUS, NORMAL GROWTH FETUS

Brief summary

Women were instructed not to use the mobile phones for 24 hours before carrying out the initial CTG trace and Doppler ultrasound. For each patient, initial 15 minutes CTG trace recording was done followed by umbilical artery Doppler ultrasound using high resolution ultrasound unit with 3-5 MHz transabdominal transducers (General Electric logic a500, logic a200 City country). Thereafter, the mobile phone (type, in the dialing mode, was put on the mother's abdomen for 10 minutes, concurrently with repeating the 15 minutes CTG trace. The umbilical artery Doppler was repeated 5 minutes after hanging up to avoid the interference with the Doppler machine. The umbilical artery Doppler ultrasound and the recorded fetal heart rate (FHR) strips before and after the mobile phone use were blindly analyzed with respect to umbilical artery resistance indices (RI) and CTG parameters in terms of number of fetal kicks, absence of beat to beat variability, loss of accelerations and the appearance of spontaneous decelerations.

Interventions

RADIATIONmobile phone

Each woman was subjected to 15 minutes CTG trace recording before using mobile phone and repeated while the phone is in the dialing mode for 10 minutes. Umbilical artery (UA) Doppler ultrasound was done after the initial CTG trace and was repeated 5 minutes after hanging up the mobile phone.

Study design

Allocation

NON_RANDOMIZED

Intervention model

SINGLE_GROUP

Primary purpose

DIAGNOSTIC

Masking

NONE

Eligibility

Sex/Gender

FEMALE

Age

18 Years to 40 Years

Healthy volunteers

Yes

Inclusion criteria

* aged 18 to 40 years pregnant between * singleton fetus * 32-38 weeks' gestation . They were classified into two groups. Group (A) included 120 women with normally growing fetuses. Group (B) included 70 women with growth-restricted fetuses.

Exclusion criteria

* presence of medical disorders or obstetric complications (in group A), anomalous fetus and non-reactive fetal CTG in initial CTG trace severe oligohydramnios

Design outcomes

Primary

Measure	Time frame
umbilical artery doppler	5 minutes after hanging up the mobile phone

Secondary

Measure	Time frame
fetal heart rate tracing	10 minutes after phone is in the dialing mode for

Countries

Egypt

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026