When Hospital Teams Fix Their Own Weak Spots, the Tiniest Babies Have Fewer Emergencies

What a large Japanese study of newborn intensive care units means for families of very premature babies

A big study across 40 newborn intensive care units in Japan found that when hospital teams were given a structured way to spot and fix their own weakest areas of care, the most premature babies — those born more than three months early — had noticeably fewer life-threatening emergencies in their first days and weeks of life [1]. Babies born at 25 to 27 weeks of pregnancy had their rate of serious early complications fall from about 40% to 31%, and the very tiniest babies, born at 22 to 24 weeks, had large drops in two of the most dangerous problems: serious infections and bleeding into the lungs [1]. The improvements did not, however, change how the children were developing at three years of age — an honest and important limit that this article explains.

Why This Question Matters

A baby born before 28 weeks of pregnancy enters the world before the body is ready for it. The skin is fragile, the lungs are barely formed, the immune system is immature, and the blood vessels around the heart have not finished their normal changes. Over the past few decades, newborn intensive care has become dramatically better at helping these babies survive [2],[3]. But survival is only part of the story. Many extremely premature babies still face sudden, serious complications in their first days — infections in the bloodstream, bleeding in the lungs or the brain, or a dangerous drop in blood pressure — and these emergencies can be fatal or can leave lasting effects [4].

Here is a fact that surprises many families: how likely a baby is to face one of these emergencies depends partly on which hospital cares for them. Researchers have known for years that different neonatal units have meaningfully different rates of complications, even after accounting for how sick or how small the babies are [5]. That difference comes down to the countless small choices and routines of care — how hands are washed, how breathing machines are managed, how quickly feeding is started. In other words, some of the risk isn't about the baby at all; it's about the system caring for the baby. That realization is both sobering and hopeful, because a system is something you can improve.

The Problem With Just Writing Better Rules

For a long time, the main way hospitals tried to improve was by writing guidelines and handing them out. It turns out that rarely works well on its own; simply distributing printed instructions produces little real change in how busy clinical teams actually behave [6]. Knowing the right thing to do and reliably doing it, shift after shift, in a crowded intensive care unit, are two very different things.

So researchers in Japan tried something different. They built a program — part of a trial called INTACT — that did not simply tell units what to do. Instead, it gave each unit a mirror and a method. First, every hospital's results were compared against national averages so the team could see, in black and white, where they were falling behind. Then a doctor and a nurse from each unit were trained as improvement leaders, and the whole team picked just two areas to work on — chosen from resuscitation at birth, breathing support, heart-and-circulation care, infection prevention, and nutrition — and made their own plan to fix them [7]. This bottom-up approach, sometimes called "participatory learning and action," has already been shown to save newborn lives in other parts of the world when communities and health workers solve problems together [8]. The idea is simple but powerful: the people at the bedside, given good information and support, are the best ones to redesign their own care.

What the Study Did and Found

The original INTACT trial enrolled a broad group of small babies, and its main result was disappointing at first glance: it did not improve the children's development at three years [7]. But researchers suspected the program might still be helping the most fragile babies in ways the big-picture result had hidden. So they went back and looked specifically at the 1,269 babies born before 28 weeks [1].

Twenty of the hospitals ran the improvement program; the rest continued their usual care. The researchers counted "acute morbidities" — a group of seven sudden, serious complications including bloodstream infection, bleeding in the lungs, severe bleeding in the brain, bowel injury, and circulatory collapse. Among babies born at 25 to 27 weeks, the share who suffered at least one of these emergencies dropped from about 40% to 31% in the program hospitals [1]. Among the most premature babies of all, born at 22 to 24 weeks, the overall drop didn't quite reach the finish line of statistical certainty, but two specific dangers fell sharply: serious infections dropped from 33% to 19%, and bleeding into the lungs fell from about 13% to 4% [1]. These are exactly the complications that these extremely fragile babies — with their delicate skin, immature defenses, and unfinished heart circulation — are most prone to, which is why better infection control and more careful heart-and-lung management made such a visible difference [9].

There were signs of how the teams achieved this. In the program hospitals, babies reached full milk feeds a few days sooner and spent less time on breathing machines [1]. These are the practical, everyday changes that add up to fewer emergencies.

It helps to understand what these "emergencies" actually are, because the words can sound abstract. A bloodstream infection in a premature baby can turn a stable day into a crisis within hours, because the immature immune system cannot contain germs the way a full-term baby's can. Bleeding into the lungs is exactly what it sounds like — a sudden, frightening event that can flood the delicate air sacs and make breathing support far harder. The other complications the study tracked, including bleeding in the brain, bowel injury, and a collapse of blood pressure, are the events that neonatal teams work hardest to prevent, because any one of them can change a baby's whole course. When a study reports that fewer babies experienced "at least one" of these events, it is describing real, concrete moments of danger that families were spared. That is why even a nine-percentage-point drop — from 40% to 31% — represents a meaningful number of babies who avoided a genuine crisis.

What It Means for Families — Honestly

If your baby is in a unit working on this kind of improvement, this study is genuine good news: a well-run, team-driven effort to raise the quality of care can lower the chance of the frightening early emergencies that families of premature babies dread. It also gives families a fair way to think about the units caring for their child — the best hospitals are not necessarily the ones with the newest equipment, but the ones with teams committed to constantly examining and improving their own routines.

But the study is also honest about what it did not do, and families deserve that honesty. The program did not reduce the longer-term breathing problems some premature babies carry home, it did not change survival rates, and — most importantly — it did not measurably improve how the children were developing at age three [1]. This is not a failure so much as a lesson about how development works. A baby's later abilities are shaped by a long chain of influences that continues for months and years: time on breathing machines, repeated medical procedures, and the amount of close contact with parents [10]. Preventing early emergencies is a crucial first link in that chain, but it cannot carry the whole weight alone. That is why researchers increasingly pair this kind of early-care improvement with programs that bring families deeply into their baby's care — approaches shown to improve children's behavior and development later on [11].

What Researchers Are Working On Next

The scientists who ran this study are clear about the next step: figuring out how to turn these early wins into lasting benefits for children's development. That likely means keeping the improvement momentum going long after the first fragile weeks, connecting hospital care to what happens at home, and supporting families as partners through discharge and beyond. They also want to make the method cheaper and easier to sustain — through online training and mentoring — so that units everywhere, including in places with fewer resources, can use it.

For families, the enduring message is one of empowerment. The quality of a baby's care is not fixed or purely a matter of luck. When the people at the bedside are given the tools, the information, and the freedom to improve their own work, the most vulnerable newborns face fewer emergencies — and that is a foundation everyone can build on.

References

  1. Toyoshima K, Mori R, Nishida T, et al. Cluster-randomized evaluation of neonatal intensive care unit quality improvement interventions in extremely preterm infants: secondary analysis of the INTACT trial. BMC Pediatr. 2026;26(1):5. doi:10.1186/s12887-025-06351-8 ↩
  2. Helenius K, Sjörs G, Shah PS, et al. Survival in very preterm infants: an international comparison of 10 national neonatal networks. Pediatrics. 2017;140(6):e20171264. doi:10.1542/peds.2017-1264 ↩
  3. Ishii N, Kono Y, Yonemoto N, Kusuda S, Fujimura M. Outcomes of infants born at 22 and 23 weeks' gestation. Pediatrics. 2013;132(1):62-71. doi:10.1542/peds.2012-2857 ↩
  4. Bell EF, Hintz SR, Hansen NI, et al. Mortality, in-hospital morbidity, care practices, and 2-year outcomes for extremely preterm infants in the US, 2013-2018. JAMA. 2022;327(3):248-263. doi:10.1001/jama.2021.23580 ↩
  5. Horbar JD, Carpenter JH, Badger GJ, et al. Mortality and neonatal morbidity among infants 501 to 1500 grams from 2000 to 2009. Pediatrics. 2012;129(6):1019-1026. doi:10.1542/peds.2011-3028 ↩
  6. Farmer AP, Légaré F, Turcot L, et al. Printed educational materials: effects on professional practice and health care outcomes. Cochrane Database Syst Rev. 2008;(3):CD004398. doi:10.1002/14651858.CD004398.pub2 ↩
  7. Nishida T, Kusuda S, Mori R, et al. Impact of comprehensive quality improvement program on outcomes in very-low-birth-weight infants: a cluster-randomized controlled trial in Japan. Early Hum Dev. 2024;190:105947. doi:10.1016/j.earlhumdev.2024.105947 ↩
  8. Seward N, Neuman M, Colbourn T, et al. Effects of women's groups practising participatory learning and action on preventive and care-seeking behaviours to reduce neonatal mortality: a meta-analysis of cluster-randomised trials. PLoS Med. 2017;14(12):e1002467. doi:10.1371/journal.pmed.1002467 ↩
  9. Allen MC, Donohue PK, Dusman AE. The limit of viability — neonatal outcome of infants born at 22 to 25 weeks' gestation. N Engl J Med. 1993;329(22):1597-1601. doi:10.1056/NEJM199311253292201 ↩
  10. Kono Y, Yonemoto N, Nakanishi H, et al. Neurodevelopmental outcomes at age 3 years of preterm infants born at 22–31 weeks' gestation. J Perinatol. 2025. doi:10.1038/s41372-025-02268-3 ↩
  11. Church PT, Grunau RE, Mirea L, et al. Family integrated care (FICare): positive impact on behavioural outcomes at 18 months. Early Hum Dev. 2020;151:105196. doi:10.1016/j.earlhumdev.2020.105196 ↩