Article Text

other Versions

PDF
Measurement of neonatal heart rate using handheld Doppler ultrasound
  1. Amanda Dyson1,
  2. Michele Jeffrey1,
  3. Martin Kluckow1,2
  1. 1Royal North Shore Hospital, Neonatal Intensive Care Unit, Sydney, Australia
  2. 2University of Sydney, Sydney, Australia
  1. Correspondence to Dr Amanda Dyson, Grace Centre for Newborn Care, The Children's Hospital at Westmead, Hawkesbury Road, Westmead, NSW 2145, Australia; amandadyson{at}yahoo.com

Abstract

Objective This pilot study aimed to determine whether handheld Doppler ultrasound is feasible and reliable for measuring neonatal heart rate (HR) when compared with ECG.

Setting Stable newborns were recruited from the neonatal intensive care unit and postnatal ward between July 2014 and January 2015 at Royal North Shore Hospital, Sydney, Australia.

Interventions Each newborn had their HR recorded every 15 s over 145 s using four different modalities: ECG, counted audible Doppler (AD) over 10 s, pulse oximetry (PO) and the Doppler display (DD).

Outcome measures The correlation and variation between each modality and ECG.

Results 51 newborns with a median gestational age of 38 weeks (27–41) and a mean weight of 2.78 kg (0.82 to 4.76) with a median postnatal age of 3 days (0–87) were studied. There was a mean difference of 0.69 bpm (95% CI −2.9 to +1.5) between AD-HR and ECG-HR with good correlation between modalities (r=0.94, p<0.01). The median time to achieve AD-HR was 3 s (1–45). The mean difference between DD-HR and ECG-HR was 5.37 bpm (95% CI −12.8 to +2.1) with moderate correlation (r=0.37, p=0.04). The mean difference between PO-HR and ECG-HR was 0.49 bpm (95% CI −1.5 to +0.51) with good correlation (r=0.99, p<0.01). The variability between AD-HR and ECG-HR decreased with decreasing weight.

Conclusions AD-HR correlates well with ECG-HR. Further research in the delivery room is recommended before using AD-HR in this area.

  • heart rate
  • neonate
  • Doppler
  • neonatal resuscitation

Statistics from Altmetric.com

Request permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.