The study, led by researchers at University College London (UCL) and University College London Hospitals NHS Foundation Trust (UCLH), suggests significant improvements in survival rates can be achieved when maternity and neonatal units have consistent staffing, resources and treatment policies.
The research shows that the overall rates of survival for infants born alive between 22 and 25 weeks of gestation and admitted to the neonatal unit at UCLH increased from 32 per cent to 71 per cent between 1981 and 2000. This includes babies born in other hospitals and transferred to UCH for intensive care.
The researchers also looked at the survival of infants born at the hospital between 1991 and 2000, including those born at 22-25 weeks gestation who died before they reached intensive care. The survival rate for this group at the end of the study period was 69 per cent – compared to 71 per cent for the group that included only babies admitted to the neonatal unit. This suggests that the results were not solely a consequence of selecting infants with a higher chance of survival.
The study was conducted by Professor John Wyatt, a UCLH consultant and professor at the UCL EGA Institute for Women's Health, in conjunction with the hospital's neonatal team, and is part of a larger, ongoing follow-up programme for all extremely premature babies cared for at UCLH.
There are in the region of 670,000 births in the UK each year and approximately 90 per cent of infants are born on time, at between 37 and 42 weeks gestation. However, around eight per cent of births are 'preterm' and these infants are usually cared for in specialist neonatal units. Significant advances in neonatal medicine over the last 20 years mean that preterm infants have a better chance of survival, although some will have profound disabilities.
Dr Jane Hawdon, UCLH clinical director for women's health, said: "These results are down to the joint working of skilled and specialist teams in maternity and neonatal care including the establishment of perinatal networks so the right babies are cared for in the right place.
"UCLH significantly increased its resources for providing neonatal care between 1981 and 2000, which included employing more staff and bringing in state-of-the-art equipment. Technical advances in neonatal care – such as improved ventilation and nutrition – have also contributed, as has the close communication between the maternity and neonatal teams so you can plan the best time of delivery for mother and baby. Our facilities will improve even more later in the year when the trust opens phase two of the new University College Hospital which will include a dedicated maternal high-dependency unit and 17 neonatal intensive care cots."
During the study, of the 357 infants admitted to the neonatal unit at 22-25 weeks gestation, 163 (45 per cent) survived to discharge from the unit. 161 were alive for medical assessment at one year of age, which included a neurological examination, a developmental assessment and tests of visual and auditory function. Approximately one quarter of the infants showed signs of impairment leading to disability at one year of age – a figure which stayed fairly constant over the assessment period.
Commenting on the results, Professor Wyatt said: "The survival of extremely premature infants has been a matter of recent debate. A previous study of all extremely premature infants born alive in the UK and Ireland (the EPICure study) gave substantially lower survival rates than we report here, and it has been argued that there has been no improvement in survival across the country as a whole since EPICure was undertaken in 1995.
"However, studies which average the results from a large number of maternity units obscure the effects of very marked variations in resources, staffing and experience in the care of extremely premature infants. It is also plausible that ethical and clinical policies vary between different units and there is published evidence to show that this will have an effect on survival rates.
"We fully acknowledge that single centre studies such as this one have statistical limitations because of the relatively small numbers involved and they can also suffer from the problems of possible selection bias. However, they are hugely important because they provide information on the survival rates that can be achieved with consistent levels of staffing and resources, and with consistent policies. They also allow counselling of women who deliver at the hospital to be based upon data that are relevant to their individual situation."
Ruth Metcalfe | alfa
Rutgers-led innovation could spur faster, cheaper, nano-based manufacturing
14.02.2018 | Rutgers University
New study from the University of Halle: How climate change alters plant growth
12.01.2018 | Martin-Luther-Universität Halle-Wittenberg
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
20.02.2018 | Life Sciences
20.02.2018 | Life Sciences
20.02.2018 | Physics and Astronomy