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Continuous Electronic Fetal Monitoring may not be that Essential

by Rishika Gupta on December 7, 2017 at 11:57 AM
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Continuous Electronic Fetal Monitoring may not be that Essential

Electronic fetal monitoring technique is often used during labor to detect newborn babies risk of hypoxia (lack of oxygen) and problem caused by it. The need Continuous fetal monitoring in all labor or just high risk labor is being debated in The BMJ journal.

Obstetrics specialists, Edward Mullins and Christoph Lees, at Imperial College London say that failure to use continuous electronic fetal monitoring "amounts to a misguided blinding of the clinician to the clinical state of the fetus."

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They argue that fetal monitoring trials have focused on uncommon outcomes, such as cerebral palsy, which is rarely linked to hypoxia during labor, and say "we should be focusing on other forms of evidence relating to the more common outcome with serious long term implications - namely, neonatal encephalopathy."

They point to research showing that continuous fetal monitoring is associated with lower early neonatal and overall infant mortality and they argue that intermittent auscultation (listening to a baby's heartbeat at regular intervals) "is not based on a thorough assessment of the evidence."
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They acknowledge that electronic fetal monitoring increases the rate of instrumental delivery (such as use of forceps) and cesarean section, but argue that increased intervention "may not be entirely undesirable, given that appropriately timed intervention is likely to avoid neonatal hypoxia, seizures, and perinatal death."

"We do not serve low risk unborn babies well and are possibly committing up to 800 every year in the UK to neonatal encephalopathy and its largely avoidable sequelae," they write. "It requires a brave stance, however, to reverse the deliberate demedicalisation that clouds this debate."

But Peter Brocklehurst, Professor of women's health at Birmingham Clinical Trials Unit, says "the more we use electronic fetal monitoring, the more harm we do, with little evidence of benefit."

He argues that "most of the fetuses identified as being at risk of hypoxia are not" and highlights a review of trial data for nearly 37,000 women that found no difference in perinatal mortality between labors with electronic fetal monitoring versus intermittent auscultation. Neonatal seizures in the fetal monitoring group was lower than in the intermittent auscultation group.

Electronic fetal monitoring increases the risk of women having a caesarean section, which is not a benign operation, he writes. Given that electronic fetal monitoring does not prevent perinatal deaths, "the excess of subsequent deaths caused by the increased risk of caesarean section is a major concern."

He points out that babies still die or are damaged because of intrapartum hypoxia and that focusing entirely on the fetal heart rate without taking account of other relevant risk factors "may create a lack of situational awareness and lead to adverse outcomes."

He believes we should not extend the use of electronic fetal monitoring to women at low risk, nor should we continue to use it as often as we currently do. "Limiting the use of electronic fetal monitoring to the very highest risk labors may be justifiable, but even then the balance of benefits and harms is uncertain," he adds.

Instead, he calls for other ways of monitoring fetal well being during labor. For example, using new technologies to identify more reliable fetal bio-markers of hypoxia.

In the meantime, "pressure continues from those with vested interests to increase the use of electronic monitoring," he writes. "Clinicians should act in the best interests of both the women and the fetus under their care. Routine use of electronic fetal monitoring is not in the best interests of either."

Source: Eurekalert
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