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UCL scientists gauge pain in premature babies
April 05, 2006Scientists at UCL (University College London) have measured responses to pain in the brains of premature babies and have shown that they are likely to experience 'true' pain rather than simply displaying reflex reactions.
The paper, published today in The Journal of Neuroscience, illustrates that routine care procedures for premature babies, such as heel-lancing for blood tests, can cause pain in premature infants. This study, undertaken on infants in the neonatal unit at the Elizabeth Garrett Anderson and Obstetric Hospital, is the first direct scientific measure of pain in premature babies.
Professor Maria Fitzgerald, UCL Department of Anatomy and Developmental Biology, who led the team, said: "The uncertainties regarding pain management in preterm infants have been increasingly highlighted in recent years and there is a lack of basic information about effective methods of pain control in the youngest patients. As a result, while considerable effort is made to provide clinical pain-control in babies undergoing invasive procedures, this remains suboptimal in many units.
Until now, there has been limited information about pain in premature babies because measuring pain in pre-verbal children is difficult. While previous research shows that even the youngest newborn infants are capable of displaying behavioural, physiological and metabolic signs of pain and distress, the measures are all indirect and could be dismissed as bodily reflex reactions, rather than measures of true pain experience."
Brain scans taken while babies were having blood tests registered a surge of blood and oxygen in the sensory area in babies' brains, which indicates that the pain was processed in the higher levels of the brain. The somatosensory cortex is involved in processing sensations from the body surface and is known to be linked to pain sensation in adults.
The results were found using near-infrared spectroscopy, which-like fMRI scans-works by measuring blood levels and oxygenation in the brain. During clinical care work, essential for ensuring a premature baby's stability, eighteen babies aged between 25 and 45 weeks from conception were studied. Scientists registered the brain activity in the babies at the moments before, during and after nurses performed routine blood tests using a heel lance.
Professor Fitzgerald added: "The importance of this is clear. The UK has the highest rate of low birth-weight babies in Western Europe; 12% all babies born need some level of special care at birth (~ 80,000 per annum) and 2.5% need neonatal intensive care (~ 17,000 per annum). Estimates show that in intensive care each baby is subjected to an average of 14 procedures per day, many of which are considered by clinical staff to be painful, such as heel lancing for blood tests and inserting chest tubes. Furthermore there is evidence that these repeated painful procedures are a significant stressor and lead to increased sensitivity to other non-painful proceduresą. Since pain information is transmitted to the preterm infant cortex from 25 weeks there is the potential for pain experience to influence brain development from a very early age as the brain is highly malleable at this stage of development."
University College London
Until now, there has been limited information about pain in premature babies because measuring pain in pre-verbal children is difficult. While previous research shows that even the youngest newborn infants are capable of displaying behavioural, physiological and metabolic signs of pain and distress, the measures are all indirect and could be dismissed as bodily reflex reactions, rather than measures of true pain experience."
Brain scans taken while babies were having blood tests registered a surge of blood and oxygen in the sensory area in babies' brains, which indicates that the pain was processed in the higher levels of the brain. The somatosensory cortex is involved in processing sensations from the body surface and is known to be linked to pain sensation in adults.
The results were found using near-infrared spectroscopy, which-like fMRI scans-works by measuring blood levels and oxygenation in the brain. During clinical care work, essential for ensuring a premature baby's stability, eighteen babies aged between 25 and 45 weeks from conception were studied. Scientists registered the brain activity in the babies at the moments before, during and after nurses performed routine blood tests using a heel lance.
Professor Fitzgerald added: "The importance of this is clear. The UK has the highest rate of low birth-weight babies in Western Europe; 12% all babies born need some level of special care at birth (~ 80,000 per annum) and 2.5% need neonatal intensive care (~ 17,000 per annum). Estimates show that in intensive care each baby is subjected to an average of 14 procedures per day, many of which are considered by clinical staff to be painful, such as heel lancing for blood tests and inserting chest tubes. Furthermore there is evidence that these repeated painful procedures are a significant stressor and lead to increased sensitivity to other non-painful proceduresą. Since pain information is transmitted to the preterm infant cortex from 25 weeks there is the potential for pain experience to influence brain development from a very early age as the brain is highly malleable at this stage of development."
University College London
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MedImmune presents new data showing burden of RSV disease
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Iron deficiency in womb may delay brain maturation in preemies
Iron plays a large role in brain development in the womb, and new University of Rochester Medical Center research shows an iron deficiency may delay the development of auditory nervous system in preemies.
Tufted bacteria cause infection in premature babies
Bacteria that normally reside on the skin of healthy people can cause serious infections in premature babies. A group of researchers at Karolinska Institutet have now found an explanation for why a certain kind of staphylococcus can attach itself to the skin and quickly develop dynamic ecosystems: the bacteria are like tufted, self-adhesive hairballs.
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