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Key Takeaways
- Genetic conditions are a leading contributor to NICU admissions, yet many eligible infants do not receive genomic testing early in their diagnostic journey.
- Rapid genome sequencing can provide answers in days rather than weeks, helping clinicians make more informed treatment decisions.
- Earlier diagnosis may reduce diagnostic uncertainty, unnecessary testing, and prolonged NICU stays.
- NICU nurses play a critical role in recognizing when a clinical presentation does not align with expected outcomes and may warrant additional evaluation.
- Genomic-first care is gaining momentum as clinical guidelines and evidence continue to support earlier use of genomic testing.
Why NICU teams are rethinking when—and how—they use genomic testing
Every NICU clinician has experienced it.
A neonate arrives with a diagnosis that seems straightforward: respiratory distress, suspected sepsis, feeding challenges, or complications related to prematurity. The team springs into action stabilizing the patient, treating the symptoms, monitoring progress, and adjusting care plans.
But then something doesn't fit.
The patient isn't responding as expected. The clinical picture becomes more complicated. Days turn into weeks, and the team is left asking a difficult question:
What are we missing?
In a recent episode of NANNcast, Dr. Linda Genen, Chief Medical Officer at GeneDx and neonatologist, explored how rapid genome sequencing is helping NICU teams answer that question sooner—and how earlier answers can fundamentally change care for some of the most vulnerable patients.
The Role of Genetics in the NICU
One of the most surprising insights from the conversation is just how common genetic conditions are among NICU patients.
While prematurity often dominates discussions about neonatal care, genetic conditions are a leading contributor to NICU admissions. Yet despite this reality, only a small percentage of eligible infants currently receive rapid genomic testing.
Why?
According to Dr. Genen, the challenge is a combination of factors:
- Clinicians are often focused on stabilizing the patient and treating the immediate symptoms
- Genetic conditions can present in various ways, especially in a neonate
- Access to rapid testing and workflows vary between institutions
- Many providers are still learning how genomic medicine fits into routine NICU care
As a result, comprehensive genetic testing like exome or genome sequencing frequently become a "last resort" rather than an early diagnostic tool.
When the Clinical Picture Doesn't Add Up
The episode brings to life a scenario familiar to every NICU professional.
Despite treatment, a neonate continues to require respiratory support longer than expected. An infant's low tone doesn't improve with time. Growth challenges persist despite interventions.
Rather than uncovering or ruling out a genetic cause immediately, care teams may spend valuable time and resources pursuing multiple diagnostic pathways before genetics enters the conversation.
The question Dr. Genen poses is powerful:
What if genomic testing happened earlier?
What if clinicians had access to critical diagnostic information before weeks of uncertainty, additional procedures, and repeated interventions?
Rapid Genome Sequencing: More Than Just a Test
One of the most compelling parts of the discussion centers on what rapid genomic testing can actually deliver for critically ill newborns.
GeneDx rapid and ultraRapid testing can provide answers in days rather than weeks, helping clinicians:
- Reach diagnoses sooner
- Reduce unnecessary testing
- Make more informed treatment decisions
- Guide conversations with families
- Create more personalized care plans
Most importantly, earlier answers can help families understand what is happening with their child at a time when uncertainty is often overwhelming.
The Impact on Clinical Care Is Significant
Perhaps the most striking takeaway from the episode is the growing evidence behind genomic-first approaches.
Dr. Genen highlights research showing that rapid genome sequencing changed clinical management in up to 87% of infants in a Level IV NICU. She also points to data linking earlier diagnoses to NICU stays shortened by as much as 20 days and overall cost savings of up to $15,786 per patient—underscoring the clinical and operational impact of getting answers sooner.
Research discussed during the conversation suggests that rapid genome sequencing can meaningfully influence clinical management in critically ill infants. Earlier diagnoses have also been associated with shorter NICU stays and more efficient use of healthcare resources.
For bedside clinicians, that translates into something even more important:
Better-informed decisions when timing matters most.
How NICU Nurses Are Central to This Shift
While genomic medicine is often discussed through a physician or laboratory lens, Dr. Genen emphasizes the critical role of NICU nurses and advanced practice providers.
Nurses spend more time with infants and families than anyone else on the care team. They notice subtle changes. They recognize when progress stalls. They hear family concerns.
As genomic testing becomes more integrated into neonatal care, nurses are uniquely positioned to:
- Identify concerning patterns
- Advocate for additional evaluation
- Support family education
- Participate in genomic care discussions
Their observations may be the catalyst that leads to answers sooner.
Genome-First Care Earlier
This conversation explores implementation strategies for incorporating rapid genome testing into everyday NICU workflows sooner.
While challenges remain—including education, workflow integration, and standardization—professional organizations are increasingly recognizing the value of genomic testing in pediatric and neonatal populations.
The result is a near future where genomic insights become a routine part of neonatal care rather than an exception.
Listen to the Full Conversation
This article only scratches the surface of the discussion.
In the full NANNcast episode, Dr. Genen shares real-world examples from her experience as a neonatologist, explains the differences between exome and genome sequencing, discusses evolving clinical guidelines, and offers practical insights for nurses and NICU care teams looking to bring genomic medicine into everyday practice.
If you care for pediatric patients in critical care, support families in the NICU, or want to better understand the clinical impact of rapid genome sequencing, this is a conversation worth hearing.
