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Update on Calcium and Phosphorus Requirements of Preterm Infants and Recommendations for Enteral Mineral Intake. Nutrients 2021; 13:nu13051470. [PMID: 33925281 PMCID: PMC8146348 DOI: 10.3390/nu13051470] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/23/2021] [Accepted: 04/23/2021] [Indexed: 12/14/2022] Open
Abstract
Background: With current Ca and P recommendations for enteral nutrition, preterm infants, especially VLBW, fail to achieve a bone mineral content (BMC) equivalent to term infants. During the first 3 years, most notably in light at term equivalent age (<−2 Z score) VLBW infants’ BMC does not catch up. In adults born preterm with VLBW or SGA, lower adult bone mass, lower peak bone mass, and higher frequency of osteopenia/osteoporosis have been found, implying an increased risk for future bone fractures. The aim of the present narrative review was to provide recommendation for enteral mineral intake for improving bone mineral accretion. Methods: Current preterm infant mineral recommendations together with fetal and preterm infant physiology of mineral accretion were reviewed to provide recommendations for improving bone mineral accretion. Results: Current Ca and P recommendations systematically underestimate the needs, especially for Ca. Conclusion: Higher enteral fortifier/formula mineral content or individual supplementation is required. Higher general mineral intake (especially Ca) will most likely improve bone mineralization in preterm infants and possibly the long-term bone health. However, the nephrocalcinosis risk may increase in infants with high Ca absorption. Therefore, individual additional enteral Ca and/or P supplementations are recommended to improve current fortifier/formula mineral intake.
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Mihatsch W, Dorronsoro Martín I, Barrios-Sabador V, Couce ML, Martos-Moreno GÁ, Argente J, Quero J, Saenz de Pipaon M. Bone Mineral Density, Body Composition, and Metabolic Health of Very Low Birth Weight Infants Fed in Hospital Following Current Macronutrient Recommendations during the First 3 Years of Life. Nutrients 2021; 13:nu13031005. [PMID: 33804764 PMCID: PMC8003951 DOI: 10.3390/nu13031005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/14/2021] [Accepted: 03/17/2021] [Indexed: 12/17/2022] Open
Abstract
The present study longitudinally evaluated growth, bone mineral density, body composition, and metabolic health outcome in very low birth weight (VLBW) infants whose in-hospital target nutrient intake was within recent recommendations. From six months to three years, bone mineral density (dual-energy X-ray absorptiometry, DXA), body composition, and metabolic health outcome were compared with a reference group of term infants. The aim was to test whether in-hospital achieved weight gain until 36 weeks of gestation (light or appropriate for term equivalent age; LTEA or ATEA) predicts later growth, bone mineral density (BMD), abdominal obesity, or metabolic health outcomes such as insulin resistance, relative to term infants, during the first three years of life. Target in-hospital energy and protein intake was not achieved. Growth in weight, length and head circumference, mid arm circumference, adiposity, fat free mass (FFM), and bone mineralization in VLBW infants was less than those in term infants and influenced by nutritional status at discharge. Preterm infants had poorer motor and cognitive outcomes. Post-discharge body composition patterns indicate FFM proportional to height but lower fat mass index in LTEA preterm infants than term infants, with no evidence of increased truncal fat in preterm infants. The hypothesis of early BMD catch-up in VLBW infants after discharge was not supported by the present data. The clinical significance of these findings is unclear. The data may suggest a reduced obesity risk but an increased osteoporosis risk. Since postnatal growth restriction may have permanent negative health effects, LTEA VLBW infants would especially appear to benefit from targeted preventive interventions. Further follow-up of the infants is required.
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Affiliation(s)
- Walter Mihatsch
- Department of Pediatrics, Ulm University and Neu-Ulm University of Applied Sciences, 89231 Neu-Ulm, Germany;
| | - Izaskun Dorronsoro Martín
- Department of Neonatology, Hospital Universitario La Paz, Department of Pediatrics, Universidad Autonoma de Madrid, 28046 Madrid, Spain; (I.D.M.); (J.Q.)
| | - Vicente Barrios-Sabador
- Department of Endocrinology, Hospital Infantil Universitario Niño Jesús, Instituto de Investigación La Princesa, Department of Pediatrics, Universidad Autónoma de Madrid, 28039 Madrid, Spain; (V.B.-S.); (G.Á.M.-M.); (J.A.)
- CIBER Fisiopatología de la obesidad y nutrición (CIBERobn), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - María L. Couce
- Neonatology Department, University Clinical Hospital of Santiago de Compostela, IDIS-Health Research Institute of Santiago de Compostela, Universidad de Santiago de Compostela, 15704 Santiago de Compostela, Spain;
| | - Gabriel Á. Martos-Moreno
- Department of Endocrinology, Hospital Infantil Universitario Niño Jesús, Instituto de Investigación La Princesa, Department of Pediatrics, Universidad Autónoma de Madrid, 28039 Madrid, Spain; (V.B.-S.); (G.Á.M.-M.); (J.A.)
- CIBER Fisiopatología de la obesidad y nutrición (CIBERobn), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Jesús Argente
- Department of Endocrinology, Hospital Infantil Universitario Niño Jesús, Instituto de Investigación La Princesa, Department of Pediatrics, Universidad Autónoma de Madrid, 28039 Madrid, Spain; (V.B.-S.); (G.Á.M.-M.); (J.A.)
- CIBER Fisiopatología de la obesidad y nutrición (CIBERobn), Instituto de Salud Carlos III, 28029 Madrid, Spain
- IMDEA Institute, 28049 Madrid, Spain
| | - José Quero
- Department of Neonatology, Hospital Universitario La Paz, Department of Pediatrics, Universidad Autonoma de Madrid, 28046 Madrid, Spain; (I.D.M.); (J.Q.)
| | - Miguel Saenz de Pipaon
- Department of Neonatology, Hospital Universitario La Paz, Department of Pediatrics, Universidad Autonoma de Madrid, 28046 Madrid, Spain; (I.D.M.); (J.Q.)
- Correspondence:
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Chinoy A, Mughal MZ, Padidela R. Metabolic bone disease of prematurity: causes, recognition, prevention, treatment and long-term consequences. Arch Dis Child Fetal Neonatal Ed 2019; 104:F560-F566. [PMID: 31079069 DOI: 10.1136/archdischild-2018-316330] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/08/2019] [Accepted: 03/10/2019] [Indexed: 12/12/2022]
Abstract
Metabolic bone disease of prematurity (MBDP) is characterised by skeletal demineralisation, and in severe cases it can result in fragility fractures of long bones and ribs during routine handling. MBDP arises from prenatal and postnatal factors. Infants who are born preterm are deprived of fetal mineral accumulation, 80% of which occurs in the third trimester. Postnatally, it is difficult to maintain a comparable intake of minerals, and medications, such as corticosteroids and diuretic therapy, lead to bone resorption. With improvements in neonatal care and nutrition, the incidence of MBDP in preterm infants appears to have decreased, although the recent practice of administering phosphate supplements alone will result in secondary hyperparathyroidism and associated bone loss, worsening MBDP. Postnatal immobilisation and loss of placental supply of oestrogen also contribute to skeletal demineralisation. There is no single diagnostic or screening test for MBDP, with pitfalls existing for most radiological and biochemical investigations. By reviewing the pathophysiology of calcium and phosphate homeostasis, one can establish that plasma parathyroid hormone is important in determining the aetiology of MBDP - primarily calcipaenia or phosphopaenia. This will then direct treatment with the appropriate supplements while considering optimal physiological calcium to phosphate ratios.
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Affiliation(s)
- Amish Chinoy
- Department of Paediatric Endocrinology, Royal Manchester Children's Hospital, Manchester, UK.,Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Mohamed Zulf Mughal
- Department of Paediatric Endocrinology, Royal Manchester Children's Hospital, Manchester, UK.,Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Raja Padidela
- Department of Paediatric Endocrinology, Royal Manchester Children's Hospital, Manchester, UK.,Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
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Kotecha SJ, Lowe J, Kotecha S. Effect of foetal and infant growth and body composition on respiratory outcomes in preterm-born children. Paediatr Respir Rev 2018; 28:55-62. [PMID: 29343422 DOI: 10.1016/j.prrv.2017.12.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 12/13/2017] [Indexed: 01/21/2023]
Abstract
Body composition and growth outcomes of preterm-born subjects have been studied by many researchers. In general, preterm-born children have lower height and weight especially in infancy. Despite showing potential for catch-up growth, they continue to lag behind their term counterparts in adolescence and adulthood. The various methods of studying body composition and the differing gestations and ages at which it is assessed may go some way to explaining the inconsistent results observed in different studies. In addition, there is a paucity of data on the effects of foetal and infant growth and of body composition on later respiratory outcomes. In largely term-born subjects, foetal growth and growth trajectories appear to have differential effects on later respiratory outcomes. Early weight gain in infancy appears to be associated with increased respiratory symptoms in childhood but catch-up growth in infancy appears to be associated with possible improved lung function status.
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Affiliation(s)
- Sarah J Kotecha
- Department of Child Health, School of Medicine, Cardiff University, Cardiff, UK
| | - John Lowe
- Department of Child Health, School of Medicine, Cardiff University, Cardiff, UK
| | - Sailesh Kotecha
- Department of Child Health, School of Medicine, Cardiff University, Cardiff, UK.
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Christmann V, van der Putten ME, Rodwell L, Steiner K, Gotthardt M, van Goudoever JB, van Heijst AFJ. Effect of early nutritional intake on long-term growth and bone mineralization of former very low birth weight infants. Bone 2018; 108:89-97. [PMID: 29289790 DOI: 10.1016/j.bone.2017.12.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 12/11/2017] [Accepted: 12/21/2017] [Indexed: 11/17/2022]
Abstract
BACKGROUND Preterm infants are at risk for impaired bone mineralization and growth in length later in life due to inadequate nutritional intake in the early postnatal period. OBJECTIVE To investigate whether increased nutritional supplementation of calcium, phosphate and protein in Very Low Birth Weight (VLBW) infants during the first 14days after birth was associated with improvement in length and bone development until 9-10years of age. DESIGN Observational follow-up study of VLBW infants (birth weight<1500g or gestational age<32weeks) born in two consecutive years (eligible infants: 2004 n: 63 and 2005: n: 66). Cohort 2005 received higher intake of calcium, phosphate and protein with parenteral nutrition compared to Cohort 2004. Anthropometric data were collected during standard follow-up visits until five years, and additionally at 9-10years of age including measurements of bone mineral content, bone mineral density of the whole body and lumbar spine determined by dual-energy X-ray absorptiometry. Long-term growth trajectories of both cohorts were evaluated separately for participants born appropriate (AGA) and small for gestational age (SGA), stratified by gender. Multivariate linear regression was used to examine the effect of nutritional intake and clinical covariates on length and bone mineralization. RESULTS Both cohorts achieved a catch-up in length to SDS within the normal range by 6months (length SDS: estimated mean (95% confidence interval (CI): 6months: Cohort 2004: -0.7 (-1.1, -0.3) Cohort 2005: -0.5 (-0.8, -0.2)). Bone mineral content and density were within the normal range and not different between the cohorts. SGA children achieved a catch-up in length at 5years with bone mineralization comparable to AGA children. Only for girls birth weight was significantly associated with length SDS (per gram: β 0.001; 95% CI (0.000, 0.003); p=0.03) There was no evidence of an association between early nutritional intake and bone mineralization. CONCLUSION Children born as appropriate or small for gestational age preterm infants are able to catch up in length after the postnatal period, and achieve a normal length and bone mineralization at age nine-ten years. An improvement of calcium and phosphate intake during the first 14days after birth was not associated with improvement in length and bone development.
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Affiliation(s)
- V Christmann
- Department of Pediatrics, Subdivision of Neonatology, Radboudumc Amalia Children's Hospital, Nijmegen, The Netherlands.
| | - M E van der Putten
- Department of Pediatrics, Subdivision of Neonatology, Radboudumc Amalia Children's Hospital, Nijmegen, The Netherlands; Department of Pediatrics, Subdivision of Neonatology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - L Rodwell
- Department for Health Evidence, Radboud Institute for Health Science, Subdivision of Biostatistics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - K Steiner
- Department of Pediatrics, Subdivision of Neonatology, Radboudumc Amalia Children's Hospital, Nijmegen, The Netherlands
| | - M Gotthardt
- Department of Radiology and Nuclear Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - J B van Goudoever
- Department of Pediatrics, VU University Medical Center Amsterdam, Amsterdam, The Netherlands; Department of Pediatrics, Emma Children's Hospital - AMC Amsterdam, Amsterdam, The Netherlands
| | - A F J van Heijst
- Department of Pediatrics, Subdivision of Neonatology, Radboudumc Amalia Children's Hospital, Nijmegen, The Netherlands
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Rehman MU, Narchi H. Metabolic bone disease in the preterm infant: Current state and future directions. World J Methodol 2015; 5:115-121. [PMID: 26413483 PMCID: PMC4572023 DOI: 10.5662/wjm.v5.i3.115] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/15/2015] [Accepted: 08/07/2015] [Indexed: 02/06/2023] Open
Abstract
Neonatal osteopenia is an important area of interest for neonatologists due to continuing increased survival of preterm infants. It can occur in high-risk infants such as preterm infants, infants on long-term diuretics or corticosteroids, and those with neuromuscular disorders. Complications such as rickets, pathological fractures, impaired respiratory function and poor growth in childhood can develop and may be the first clinical evidence of the condition. It is important for neonatologists managing such high-risk patients to regularly monitor biochemical markers for evidence of abnormal bone turnover and inadequate mineral intake in order to detect the early phases of impaired bone mineralization. Dual-energy X-ray absorptiometry has become an increasingly used research tool for assessing bone mineral density in children and neonates, but more studies are still needed before it can be used as a useful clinical tool. Prevention and early detection of osteopenia are key to the successful management of this condition and oral phosphate supplements should be started as soon as is feasible.
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Bone and fat mass in relation to postnatal levels of insulin-like growth factors in prematurely born children at 4 y of age. Pediatr Res 2014; 75:544-50. [PMID: 24441105 DOI: 10.1038/pr.2014.4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Accepted: 09/27/2013] [Indexed: 12/14/2022]
Abstract
BACKGROUND Children born prematurely may be at risk of developing osteopenia. This study investigated whether insulin-like growth factors (IGFs) in the early postnatal period influence bone mass and body composition in prematurely born children. METHODS A total of 74 control (gestational age >36 wk; n = 37) and preterm (gestational age <32 wk; n = 37) infants were investigated (mean age ± SD: 4.59 ± 0.31 y). Bone mineral density, body composition, and markers of bone and mineral metabolism were investigated in relation to postnatal IGF levels. RESULTS After adjusting for confounders, we found no differences in bone mass, but significantly less lean mass, increased fat mass, and increased osteocalcin levels in ex-preterm infants. Forward stepwise multiple analysis revealed that higher late postnatal IGF-II levels predict lumbar spine bone mineral content (P < 0.05) and lean mass (P < 0.05). When the birth weight standard deviation score was included in the analysis, higher early postnatal IGF-I levels predicted both lumbar spine bone mineral density and bone mineral content (P < 0.05). Higher early postnatal IGF binding protein-3 (P < 0.01) predicted increased fat mass at 4-y follow-up. CONCLUSION Ex-preterm children have normal bone mass but different body composition compared with full-term controls. Higher early IGF-I and late postnatal IGF-II concentrations are positive predictors of lumbar spine bone mass.
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Visser F, Sprij AJ, Brus F. The validity of biochemical markers in metabolic bone disease in preterm infants: a systematic review. Acta Paediatr 2012; 101:562-8. [PMID: 22313336 DOI: 10.1111/j.1651-2227.2012.02626.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
UNLABELLED To establish the validity of biochemical markers of metabolic bone disease (MBD) in preterm infants. CONCLUSION There is insufficient evidence that any of the frequently used serum measurements are valid biochemical markers of MBD in preterm infants. Increased urinary calcium concentration may be a valid biochemical marker, but more research is necessary to confirm this.
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Affiliation(s)
- Fenna Visser
- Department of Paediatrics, Juliana Children's Hospital, The Hague, The Netherlands.
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Decreased bone mineral density in adults born with very low birth weight: a cohort study. PLoS Med 2009; 6:e1000135. [PMID: 19707270 PMCID: PMC2722726 DOI: 10.1371/journal.pmed.1000135] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2009] [Accepted: 07/17/2009] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Very-low-birth-weight (VLBW, <1,500 g) infants have compromised bone mass accrual during childhood, but it is unclear whether this results in subnormal peak bone mass and increased risk of impaired skeletal health in adulthood. We hypothesized that VLBW is associated with reduced bone mineral density (BMD) in adulthood. METHODS AND FINDINGS The Helsinki Study of Very Low Birth Weight Adults is a multidisciplinary cohort study representative of all VLBW births within the larger Helsinki area from 1978 to 1985. This study evaluated skeletal health in 144 such participants (all born preterm, mean gestational age 29.3 wk, birth weight 1,127 g, birth weight Z score 1.3), and in 139 comparison participants born at term, matched for sex, age, and birth hospital. BMD was measured by dual energy X-ray absorptiometry at age 18.5 to 27.1 y. Adults born with VLBW had, in comparison to participants born at term, a 0.51-unit (95% confidence interval [CI] 0.28-0.75) lower lumbar spine Z score and a 0.56-unit (95% CI 0.34-0.78) lower femoral neck Z score for areal BMD. These differences remained statistically significant after adjustment for the VLBW adults' shorter height and lower self-reported exercise intensity. CONCLUSIONS Young adults born with VLBW, when studied close to the age of peak bone mass, have significantly lower BMD than do their term-born peers. This suggests that compromised childhood bone mass accrual in preterm VLBW children translates into increased risk for osteoporosis in adulthood, warranting vigilance in osteoporosis prevention.
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Rigo J, Pieltain C, Salle B, Senterre J. Enteral calcium, phosphate and vitamin D requirements and bone mineralization in preterm infants. Acta Paediatr 2007; 96:969-74. [PMID: 17577338 DOI: 10.1111/j.1651-2227.2007.00336.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
UNLABELLED With major advances in life-support measures, nutrition has become one of the most debated issues in the care of very low birth-weight (VLBW) infants. Current nutritional recommendations are based on healthy premature infants and designed to provide postnatal nutrient retention during the 'stable-growing' period equivalent to the intrauterine gain of a normal foetus. However, this reference is still a matter of discussion, especially in the field of the mineral requirements. After birth, there are dramatic physiological changes in bone metabolism resulting from various factors: disruption in maternal mineral supply, stimulation of calciotropic hormone secretion, change in hormonal environment and relative reduction in mechanical stress. These events stimulate the remodelling process leading to an increase in endosteal bone resorption and a decrease in bone density. In preterm infants, these adaptation processes modify the mineral requirement, since, by itself, the increased remodelling provides a part of the mineral requirement necessary for postnatal bone growth and turnover. The care of newly born premature infants should not necessarily aim to achieve intrauterine calcium accretion rates. CONCLUSION Considering that a calcium retention level ranging from 60 to 90 mg/kg/day assures appropriate mineralization, and decreases the risk of fracture and diminishes the clinical symptoms of osteopenia, an intake of 100 to 160 mg/kg/day of highly bioavailable calcium salts, 60 to 90 mg/kg/day of phosphorus and 800 to 1000 IU of vitamin D per day is recommended.
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Affiliation(s)
- Jacques Rigo
- Pediatrics and Neonatal Department, University of Liege CHR Citadelle, Liège, Belgium.
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Nutritional needs of premature infants: Current Issues. The journal The Journal of Pediatrics 2006. [DOI: 10.1016/j.jpeds.2006.06.057] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Halaba ZP, Bursa J, Kaplon UK, Pluskiewicz W, Marciniak S, Drzewiecka U. Phalangeal quantitative ultrasound measurements in former pre-term children aged 9-11 years. Br J Radiol 2006; 80:401-5. [PMID: 17068013 DOI: 10.1259/bjr/55460700] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The objective of this study was to compare phalangeal ultrasound values in 38 former pre-term children, aged 9-11 years, with 50 age-matched term controls. Skeletal status was evaluated using phalangeal quantitative ultrasound measurements (QUS) by DBM Sonic 1200 (IGEA, Carpi, Italy) which measures the amplitude dependent speed of sound (Ad-SoS, m s(-1)). There were no significant differences in values of Ad-SoS, weight and height between patients and controls irrespective of birth weight or prematurity. In conclusion, phalangeal ultrasound measurements performed in prematurely born infants show that at the age of 9-11 years their bone status does not differ from children born at term.
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Affiliation(s)
- Z P Halaba
- Public Clinical Hospital No 1 in Zabrze, Poland.
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Abstract
Bone mass increases progressively during childhood, but mainly during adolescence when approximately 40% of total bone mass is accumulated. Peak bone mass is reached in late adolescence, and is a well recognised risk factor for osteoporosis later in life. Thus, increasing peak bone mass can prevent osteoporosis. The critical interpretation of bone mass measurements is a crucial factor for the diagnosis of osteopenia/osteoporosis in children and adolescents. To date, there are insufficient data to formally define osteopenia/osteoporosis in this patient group, and the guidelines used for adult patients are not applicable. In males and females aged <20 years the terminology 'low bone density for chronologic age' may be used if the Z-score is less than -2. For children and adolescents, this terminology is more appropriate than osteopenia/osteoporosis. Moreover, the T-score should not be used in children and adolescents. Many disorders, by various mechanisms, may affect the acquisition of bone mass during childhood and adolescence. Indeed, the number of disorders that have been identified as affecting bone mass in this age group is increasing as a consequence of the wide use of bone mass measurements. The increased survival of children and adolescents with chronic diseases or malignancies, as well as the use of some treatment regimens has resulted in an increase in the incidence of reduced bone mass in this age group. Experience in treating the various disorders associated with osteoporosis in childhood is limited at present. The first approach to osteoporosis management in children and adolescents should be aimed at treating the underlying disease. The use of bisphosphonates in children and adolescents with osteoporosis is increasing and their positive effect in improving bone mineral density is encouraging. Osteoporosis prevention is a key factor and it should begin in childhood. Pediatricians should have a fundamental role in the prevention of osteoporosis, suggesting strategies to achieve an optimal peak bone mass.
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Smith CM, Coombs RC, Gibson AT, Eastell R. Adaptation of the Carter method to adjust lumbar spine bone mineral content for age and body size: application to children who were born preterm. J Clin Densitom 2006; 9:114-9. [PMID: 16731440 DOI: 10.1016/j.jocd.2005.10.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2005] [Revised: 06/12/2005] [Accepted: 10/24/2005] [Indexed: 11/26/2022]
Abstract
In adults, the Carter method allows the separation of the lumbar spine bone mineral content (BMC) into its constituents; bone volume (BV) and volumetric density (bone mineral apparent density [BMAD]). However, this method is not widely used in pediatric studies and does not account for the effects of body habitus on bone mass. The aims of this study were to modify the Carter method for use in children by developing an approach that adjusts separately for age and body height, and to test whether lumbar spine bone mass is normal in children born who were born preterm. Twenty-five preterm-born children were matched to a term-born child. Lumbar spine bone mass was measured using dual-energy X-ray absorptiometry. The BV and BMAD were calculated. Z-scores based on age and height were calculated. The preterm group had reduced absolute height, weight, BMC, BV, and BMAD, and reduced height, weight, and BMC for their age. The BMC was appropriate for height. The BV was appropriate for age. The BMAD was reduced for age but appropriate for height. In preterm children, the major abnormality at the lumbar spine is a decrease in volumetric density; however, this decrease is proportional with their reduced stature, and we speculate that there is no reduction in the strength of the lumbar spine.
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Affiliation(s)
- Christine M Smith
- Academic Unit of Bone Metabolism, Division of Clinical Sciences (North), University of Sheffield, and Neonatology Unit, Jessop Wing, Royal Hallamshire Hospital, Sheffield, United Kingdom
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Liao XP, Zhang WL, He J, Sun JH, Huang P. Bone measurements of infants in the first 3 months of life by quantitative ultrasound: the influence of gestational age, season, and postnatal age. Pediatr Radiol 2005; 35:847-53. [PMID: 15889246 DOI: 10.1007/s00247-005-1481-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2004] [Revised: 03/22/2005] [Accepted: 03/26/2005] [Indexed: 11/29/2022]
Abstract
BACKGROUND There are a few quantitative ultrasound (QUS) studies of bone status for Chinese children. OBJECTIVE To evaluate the clinical application and to investigate the bone status of neonates and young infants with QUS. MATERIALS AND METHODS An ultrasound bone sonometer was used to measure the bone speed of sound (SOS) of the tibia in 542 neonates within 3 months of birth. RESULTS At birth, no significant difference of SOS was found between boys and girls, but there was a significant difference of SOS between premature infants and full-term infants. The SOS in neonates born during spring and summer was significantly lower than those born during autumn and winter. There were significant correlations between SOS and gestational age, and between bone SOS and birth weight in appropriate for gestational age (AGA) infants. Multiple regression analysis found that gestational age and infant birth season were two important factors influencing SOS. During the first 3 months, there was no significant difference in SOS between sexes. The SOS of infants showed an inverse correlation with postnatal age, and the decrease of bone SOS with age in premature infants was more marked than in full-term infants. CONCLUSIONS QUS is suitable for evaluating bone status in infants with high precision. The study offers some basic data for neonates and young infants.
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Affiliation(s)
- Xiang-Peng Liao
- Division of Nutrition, Shanghai Institute for Pediatric Research, Shanghai Xinhua Hospital, Shanghai Second Medical University, 1665 Kong Jiang Road, Shanghai 200092, China
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Backström MC, Kuusela AL, Koivisto AM, Sievänen H. Bone structure and volumetric density in young adults born prematurely: a peripheral quantitative computed tomography study. Bone 2005; 36:688-93. [PMID: 15780965 DOI: 10.1016/j.bone.2005.02.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2004] [Revised: 01/21/2005] [Accepted: 02/05/2005] [Indexed: 11/23/2022]
Abstract
Prematurity is known to be associated with reduced bone mineral density (BMD) in childhood, but whether this condition has long-term detrimental consequences on adult bone structure is not known. In this study, we measured with peripheral quantitative computed tomography (pQCT) the total bone cross-sectional area, cortical area and wall thickness, cortical and trabecular density, and a density-weighed polar section modulus as a bone strength index (BSI) at distal and shaft sites of right radius and tibia in a group of 40 prematurely born, otherwise normally developed and healthy young adults (17 women and 23 men, aged 18 to 27 years) and compared their data to corresponding data obtained from a group of 42 control subjects born term (20 women and 22 men, aged 18 to 28 years). Body height and weight were similar in both groups, but the preterm group had significantly lower BSI values at distal sites of tibia (approximately -16%) and radius (approximately -13%) and at tibial shaft (approximately -11%) as compared to control group. In the weight-bearing tibia, BMC was lower and the lower BSI values were mainly due to smaller total bone cross-sectional area. For unknown reason, this prematurity-associated detrimental effect seemed to concern more men than women. In contrast, prematurity was not associated with volumetric trabecular and cortical densities at any measured bone site while the typical sex differences in bone density were observed. We conclude that prematurity is associated with somewhat smaller cross-sectional bone dimensions in terms of body size in young adulthood. Due to the cross-sectional design, this study could not reveal specific reasons but they may pertain to nutrition during the neonatal period and living habits in general.
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Affiliation(s)
- M C Backström
- Department of Paediatrics, Vasa Central Hospital, Finland.
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Yeste D, Almar J, Clemente M, Gussinyé M, Audí L, Carrascosa A. Areal bone mineral density of the lumbar spine in 80 premature newborns: a prospective and longitudinal study. J Pediatr Endocrinol Metab 2004; 17:959-66. [PMID: 15301043 DOI: 10.1515/jpem.2004.17.7.959] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Maximum bone mass accretion in the fetal skeleton is acquired during the third trimester of gestation, and may be compromised in premature newborns. OBJECTIVE To ascertain the incidence and evolution of osteopenia, a longitudinal study was performed to evaluate areal bone mineral density (aBMD) in the lumbar spine in premature newborns followed during the first 2 years of life. METHODS aBMD values were assessed in lumbar spine (L2-L4) by DEXA and expressed as grams hydroxyapatite/cm2 in 80 premature newborns, 41 boys and 39 girls, of gestational ages 24.5-35.7 weeks. aBMD values were evaluated at (mean+/-SD) 0.2+/-0.1 years (at discharge from the neonatal unit), 0.9+/-0.2 years and 2.0+/-0.5 years of postnatal age, and compared with those of age- and sex-matched full-term newborns with normal intrauterine and postnatal growth. RESULTS aBMD values recovered progressively from the first to the third evaluations, and were 0.139+/-0.06 g/cm2 (-2.4+/-1.4 SDS) at 0.2+/-0.1, 0.270+/-0.06 g/cm2 (-1.0+/-1.0 SDS) at 0.9+/-0.2 and 0.410 g/cm2 (-0.08+/-1.0 SDS) at 2.0+/-0.5 years. CONCLUSIONS Our data show a significant catch-up of aBMD, reaching values similar to those of full-term newborns at the age of 0.2+/-0.5 years, regardless of the gestational age at birth.
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Affiliation(s)
- Diego Yeste
- Pediatric Endocrinology Unit and Neonatology Unit, Hospital Materno-Infantil Vall d'Hebron, Barcelona, Spain.
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