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Basalely AM, Griffin R, Gist KM, Guillet R, Askenazi DJ, Charlton JR, Selewski DT, Fuloria M, Kaskel FJ, Reidy KJ. Association of early dysnatremia with mortality in the neonatal intensive care unit: results from the AWAKEN study. J Perinatol 2022; 42:1353-1360. [PMID: 34775486 PMCID: PMC10228559 DOI: 10.1038/s41372-021-01260-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 10/12/2021] [Accepted: 10/20/2021] [Indexed: 01/18/2023]
Abstract
OBJECTIVE To determine the association of dysnatremia in the first postnatal week and risk of acute kidney injury (AKI) and mortality. STUDY DESIGN A secondary analysis of 1979 neonates in the AWAKEN cohort evaluated the association of dysnatremia with (1) AKI in the first postnatal week and (2) mortality, utilizing time-varying Cox proportional hazard models. RESULT Dysnatremia developed in 50.2% of the cohort and was not associated with AKI. Mortality was associated with hyponatremia (HR 2.15, 95% CI 1.07-4.31), hypernatremia (HR 4.23, 95% CI 2.07-8.65), and combined hypo/hypernatremia (HR 6.39, 95% CI 2.01-14.01). In stratified models by AKI-status, hypernatremia and hypo/hypernatremia increased risk of mortality in neonates without AKI. CONCLUSION Dysnatremia within the first postnatal week was associated with increased risk of mortality. Hypernatremia and combined hypo/hypernatremia remained significantly associated with mortality in neonates without AKI. This may reflect fluid strategies kidney injury independent of creatinine and urine-output defined AKI, and/or systemic inflammation.
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Affiliation(s)
- Abby M Basalely
- Division of Pediatric Nephrology, Department of Pediatrics, Cohen Children's Medical Center of New York, New Hyde Park, NY, USA.
- Division of Nephrology, Department of Pediatrics, The Children's Hospital at Montefiore/Albert Einstein College of Medicine, Bronx, NY, USA.
| | - Russell Griffin
- Pediatric and Infant Center for Acute Nephrology (PICAN) Department of Pediatrics, University of Alabama, Birmingham, AL, USA
| | - Katja M Gist
- Department of Pediatrics, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Ronnie Guillet
- Division of Neonatology, University of Rochester Medical Center, Rochester, NY, USA
| | - David J Askenazi
- Pediatric and Infant Center for Acute Nephrology (PICAN) Department of Pediatrics, University of Alabama, Birmingham, AL, USA
| | - Jennifer R Charlton
- Division of Nephrology, Department of Pediatrics, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - David T Selewski
- Division of Nephrology, Department of Pediatrics, Medical University of South Carolina, Charleston, SC, USA
| | - Mamta Fuloria
- Division of Pediatric Neonatology, Department of Pediatrics, The Children's Hospital at Montefiore/Albert Einstein College of Medicine, Bronx, NY, USA
| | - Frederick J Kaskel
- Division of Nephrology, Department of Pediatrics, The Children's Hospital at Montefiore/Albert Einstein College of Medicine, Bronx, NY, USA
| | - Kimberly J Reidy
- Division of Nephrology, Department of Pediatrics, The Children's Hospital at Montefiore/Albert Einstein College of Medicine, Bronx, NY, USA
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Jha R, Tewari VV, Tewari D, Devgan A. Urine Specific Gravity Measurement for Fluid Balance in Neonates on Intravenous Fluids in a Neonatal Intensive Care Unit: An Open Label Randomized Controlled Trial. Indian Pediatr 2022. [DOI: 10.1007/s13312-022-2596-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Diderholm B, Normann E, Ahlsson F, Sindelar R, Ågren J. The Impact of Restricted versus Liberal Early Fluid Volumes on Plasma Sodium, Weight Change, and Short-Term Outcomes in Extremely Preterm Infants. Nutrients 2022; 14:795. [PMID: 35215444 PMCID: PMC8878438 DOI: 10.3390/nu14040795] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/02/2022] [Accepted: 02/09/2022] [Indexed: 02/01/2023] Open
Abstract
The optimal fluid requirements for extremely preterm infants are not fully known. We examined retrospectively the fluid intakes during the first week of life in two cohorts of extremely preterm infants born at 22-26 weeks of gestation before (n = 63) and after a change from a restrictive to a more liberal (n = 112) fluid volume allowance to improve nutrient provision. The cohorts were similar in gestational age and birth weight, but antenatal steroid exposure was more frequent in the second era. Although fluid management resulted in a cumulative difference in the total fluid intake over the first week of 87 mL/kg (p < 0.001), this was not reflected in a mean weight loss (14 ± 5% at a postnatal age of 4 days in both groups) or mean peak plasma sodium (142 ± 5 and 143 ± 5 mmol/L in the restrictive and liberal groups, respectively). The incidences of hypernatremia (>145 and >150 mmol/L), PDA ligation, bronchopulmonary dysplasia, and IVH were also similar. We conclude that in this cohort of extremely preterm infants a more liberal vs. a restricted fluid allowance during the first week had no clinically important influence on early changes in body weight, sodium homeostasis, or hospital morbidities.
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Affiliation(s)
- Barbro Diderholm
- Department of Women’s and Children’s Health, Uppsala University Children’s Hospital, SE-75185 Uppsala, Sweden; (E.N.); (F.A.); (R.S.); (J.Å.)
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Hu L, Yang L, Yan K, Wu B, Wang H, Zhang R, Wang J, Cao Y, Cheng G, Zhou W. Importance of Early Genetic Sequencing in Neonates Admitted to NICU with Recurrent Hypernatremia: Results of a Prospective Cohort Study. Neonatology 2022; 119:103-110. [PMID: 34802008 DOI: 10.1159/000519634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 09/10/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVES The genetic characteristics in neonates admitted to the NICU with recurrent hypernatremia remained unknown. We aimed to implement early genetic sequencing to identify possible genetic etiologies, optimize the treatment, and improve the outcome. METHODS We prospectively performed exome sequencing or targeted panel sequencing on neonates diagnosed with recurrent hypernatremia (plasma sodium ≥150 mEq/L, ≥2 episodes) from January 1, 2016, to June 30, 2020. RESULTS Among 22,375 neonates admitted to the NICU, approximately 0.33% (73/22,375) developed hypernatremia. The incidence of hypernatremia >14 days and ≤14 days was 0.03% and 0.3%, respectively. Among 38 neonates who had ≥2 hypernatremia episodes, parents of 28 patients consented for sequencing. Genetic diagnosis was achieved in 25% neonates (7/28). Precision medicine treatment was performed in 85.7% (6/7) of the patients, including hydrochlorothiazide and indomethacin for 57.1% (4/7) with arginine vasopressin receptor 2 (AVPR2) deficiency-associated congenital nephrogenic diabetes insipidus; a special diet of fructose formula for 1 patient with solute carrier family 5 member 1 deficiency-associated congenital glucose-galactose malabsorption (1/7, 14.3%); and kallikrein-inhibiting ointment for 1 patient with serine protease inhibitor of Kazal-type 5 deficiency-associated Netherton syndrome (1/7, 14.3%). Only hypernatremia onset age (adjusted odds ratio 1.32 [1.01-1.72], p = 0.040) independently predicted the underlying genetic etiology. The risk of a genetic etiology of hypernatremia was 9.0 times higher for neonates with a hypernatremia onset age ≥17.5 days (95% confidence interval, 1.1-73.2; p = 0.038). CONCLUSIONS Single-gene disorders are common in neonates with recurrent hypernatremia, and >50% of cases are caused by AVPR2 deficiency-associated congenital nephrogenic diabetes insipidus. Early genetic testing can aid the diagnosis of unexplained recurrent neonatal hypernatremia and improve therapy and outcome.
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Affiliation(s)
- Liyuan Hu
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Lin Yang
- Clinical Genetic Center, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Kai Yan
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Bingbing Wu
- Shanghai Key Laboratory of Birth Defects, National Children's Medical Center, The Translational Medicine Center of Children Development and Disease of Fudan University, Children's Hospital of Fudan University, Shanghai, China
| | - Huijun Wang
- Shanghai Key Laboratory of Birth Defects, National Children's Medical Center, The Translational Medicine Center of Children Development and Disease of Fudan University, Children's Hospital of Fudan University, Shanghai, China
| | - Rong Zhang
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Jin Wang
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Yun Cao
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Guoqiang Cheng
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Wenhao Zhou
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China.,China Neonatal Genomes Project (CNGP), Shanghai, China
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Fetal surgery and neonatal ICU admissions. Curr Opin Pediatr 2020; 32:619-624. [PMID: 32692057 DOI: 10.1097/mop.0000000000000900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW Fetal intervention is a dynamic field with wide-reaching implications on neonatal ICU admissions and the care of neonates with congenital anomalies. The aim of this review is to summarize recent advancements in fetal surgery and provide a broad understanding of how these topics interrelate. RECENT FINDINGS Advancements in prenatal imaging and diagnosis have dramatically expanded the indications for fetal intervention. Most recently, there has been a large focus on evaluating minimally invasive strategies of fetal intervention, notably fetoscopic surgery, and the use of stem cells for fetal treatment of myelomeningocele. With the advances in fetal intervention, neonatal care has adapted to the needs of these various patients to help improve the outcomes of this unique population. SUMMARY Fetal intevention relies on a multidisciplinary team from prenatal imaging and maternal fetal medicine to fetal surgery and postnatal subspecialty care, particuarly neonatology. Fetal intervention uniquely involves two patients, both mother and fetus, and therefore, has unique risks and considerations, particularly in the advancement of the field. As the number of conditions suited to fetal intervention grows, awareness and advancement of the postnatal intensive care necessary for these patients are essential.
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Monnikendam CS, Mu TS, Aden JK, Lefkowitz W, Carr NR, Aune CN, Ahmad KA. Dysnatremia in extremely low birth weight infants is associated with multiple adverse outcomes. J Perinatol 2019; 39:842-847. [PMID: 30932030 DOI: 10.1038/s41372-019-0359-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 02/04/2019] [Accepted: 02/15/2019] [Indexed: 11/09/2022]
Abstract
OBJECTIVE The objective of this study is to discern patterns of serum sodium in a broad cohort of extremely low birth weight (ELBW) infants and associate those patterns with hospital outcomes. STUDY DESIGN Retrospective cohort study of ELBW infants from 323 neonatal intensive care units (NICUs) discharged from 2004 to 2014. We included patients who survived at least 7 days and had daily sodium levels available, and categorized infants by their minimum and maximum sodium levels. RESULTS We identified 26,871 infants of whom 12,428 met inclusion criteria. Only 1964 (15.8%) maintained eunatremia for the first week. We found most dysnatremias to be associated with increased overall mortality compared with eunatremic patients including moderate hyponatremia (12.9% vs. 8.6%, p < 0.05) and severe hypernatremia (34.8% vs. 8.6%, p < 0.001). Most of these associations were maintained after regression modeling for mortality. CONCLUSION Sodium fluctuations occurring within the first week of life are associated with increased mortality.
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Affiliation(s)
| | - Thornton S Mu
- Department of Pediatrics, Brooke Army Medical Center, San Antonio, TX, USA.
| | - James K Aden
- Department of Graduate Medical Education, Brooke Army Medical Center, San Antonio, TX, USA
| | - William Lefkowitz
- Department of Pediatrics, Tripler Army Medical Center, Honolulu, HI, USA
| | - Nicholas R Carr
- Department of Pediatrics, Brooke Army Medical Center, San Antonio, TX, USA
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El-Kafrawy U, Taylor RJ. Optimizing care of ventilated infants by improving weighing accuracy on incubator scales. J Neonatal Perinatal Med 2016; 9:377-383. [PMID: 28009333 DOI: 10.3233/npm-161623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVES To determine the accuracy of weighing ventilated infants on incubator scales and whether the accuracy can be improved by the addition of a ventilator tube compensator (VTC) device to counterbalance the force exerted by the ventilator tubing. STUDY DESIGN Body weights on integral incubator scales were compared in ventilated infants (with and without a VTC), with body weights on standalone electronic scales (true weight). Individual and series of trend weights were obtained on the infants. The method of Bland and Altman was used to assess the introduced bias. RESULTS The study included 60 ventilated infants; 66% of them weighed <1000 g. A total of 102 paired-weight datasets for 30 infants undergoing conventional ventilation and 30 undergoing high frequency oscillator ventilation (HFOV) supported by a SensorMedics oscillator, (with and without a VTC) were obtained. The mean differences and (95% CI for the bias) between the integral and true scale weighing methods was 60.8 g (49.1 g to 72.5 g) without and -2.8 g (-8.9 g to 3.3 g) with a VTC in HFOV infants; 41.0 g (32.1 g to 50.0 g) without and -5.1 g (-9.3 g to -0.8 g) with a VTC for conventionally ventilated infants. Differences of greater than 2% were considered clinically relevant and occurred in 93.8% without and 20.8% with a VTC in HFOV infants and 81.5% without and 27.8% with VTC in conventionally ventilated infants. CONCLUSIONS The use of the VTC device represents a substantial improvement on the current practice for weighing ventilated infants, particularly in the extreme preterm infants where an over- or underestimated weight can have important clinical implications for treatment. A large-scale clinical trial to validate these findings is needed.
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Affiliation(s)
- Ula El-Kafrawy
- Neonatal Intensive Care Unit, Royal Bolton Hospital, Bolton, UK
| | - R J Taylor
- Department of Medical Physics, Salford Royal NHS Foundation Trust, Salford, UK
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Visram AR. Intraoperative fluid therapy in neonates. SOUTHERN AFRICAN JOURNAL OF ANAESTHESIA AND ANALGESIA 2016. [DOI: 10.1080/22201181.2016.1140705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Anh AVQ, Norris RLG, Charles BG. Modelling Drug Loss during Intravenous Infusion to Premature Neonates. JOURNAL OF PHARMACY PRACTICE AND RESEARCH 2015. [DOI: 10.1002/j.2055-2335.2006.tb00626.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Ross LG Norris
- Australian Centre for Paediatric Pharmacokinetics; Mater Health Services; South Brisbane Queensland
| | - Bruce G Charles
- School of Pharmacy; The University of Queensland
- Australian Centre for Paediatric Pharmacokinetics; Mater Health Services; South Brisbane Queensland
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Mulder PJ, Gardner SE. The healthy newborn hydration model: a new model for understanding newborn hydration immediately after birth. Biol Res Nurs 2014; 17:94-9. [PMID: 25504955 DOI: 10.1177/1099800414529362] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The normal small volume of breast milk produced in the first 2 days following birth may raise concerns about adequate hydration in breast-fed newborns. These concerns are further magnified when breast-fed infants lose ≥7% of their birth weight within 2 days postnatally. Weight loss following birth is presumably mostly water loss that could result in hypohydration and subsequent hypernatremic dehydration. However, excess fluid loss immediately following birth is a normal and necessary process. Furthermore, newborns exposed to excess fluid intake during labor may need to lose ≥7% of birth weight in the first 2 days following birth in order to achieve euhydration. Normal newborn fluid loss following birth confounds the use of weight loss as the sole measure of newborn hydration. We thus propose the healthy newborn hydration model that highlights the normalcy of newborn weight loss immediately following birth and the healthy newborn's compensatory mechanisms for preserving adequate hydration. We also recommend the use of serum sodium to measure intravascular osmolarity in addition to monitoring weight loss to obtain a more comprehensive newborn hydration assessment. Research is necessary in healthy newborns to identify relationships among fluids received in utero, newborn weight loss, and hydration, as evaluated with laboratory measures, in the first 2 days following birth. This information will guide clinicians in correctly identifying newborns with inadequate hydration who are in need of supplementary fluids versus newborns with adequate hydration for whom exclusive breast-feeding can be supported and encouraged.
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Affiliation(s)
| | - Sue E Gardner
- College of Nursing, University of Iowa, Iowa City, IA, USA
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Sharma A, Ford S, Calvert J. Adaptation for life: a review of neonatal physiology. ANAESTHESIA AND INTENSIVE CARE MEDICINE 2014. [DOI: 10.1016/j.mpaic.2014.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
It is important to monitor renal function in the neonate, especially in premature infants where nephrogenesis is still in process upon birth. The kidneys are responsible for maintaining homeostasis in the extracellular environment by preventing overaccumulation of waste products and electrolytes. This review describes developmental physiology of the renal system as well as laboratory testing to monitor renal function and glomerular filtration in neonates. Drugs that may affect renal function in infants are also discussed.
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Le Compte AJ, Chase JG, Lynn A, Hann CE, Shaw GM, Lin J. Development of blood glucose control for extremely premature infants. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2011; 102:181-191. [PMID: 21247652 DOI: 10.1016/j.cmpb.2010.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2009] [Revised: 03/03/2010] [Accepted: 03/15/2010] [Indexed: 05/30/2023]
Abstract
Extremely premature neonates often experience hyperglycaemia, which has been linked to increased mortality and worsened outcomes. Insulin therapy can assist in controlling blood glucose levels and promoting needed growth. This study presents the development of a model-based stochastic targeted controller designed to adapt insulin infusion rates to match the unique and changing metabolic state and control parameters of the neonate. Long-term usage of targeted BG control requires successfully forecasting variations in neonatal metabolic state, accounting for differences in clinical practices between units, and demonstrating robustness to errors that can occur in everyday clinical usage. Simulation studies were used to evaluate controller ability to target several common BG ranges and evaluate controller sensitivity to missed BG measurements and delays in control interventions on a virtual patient cohort of 25 infants developed from retrospective data. Initial clinical pilot trials indicated model performance matched expected performance from simulations. Stochastic targeted glucose control developed using validated patient-specific virtual trials can yield effective protocols for this cohort. Long-term trials show fundamental success, however clinical interface design appears as a critical factor to ensuring good compliance and thus good control.
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Affiliation(s)
- Aaron J Le Compte
- Department of Mechanical Engineering, University of Canterbury, New Zealand
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Sharma A, Ford S, Calvert J. Adaptation for life: a review of neonatal physiology. ANAESTHESIA AND INTENSIVE CARE MEDICINE 2011. [DOI: 10.1016/j.mpaic.2010.11.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Draining Fluids through a Peritoneal Catheter in Newborns after Cardiac Surgery Helps to Control Fluid Balance. Case Rep Med 2010; 2010:731865. [PMID: 20379389 PMCID: PMC2850550 DOI: 10.1155/2010/731865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2009] [Revised: 03/12/2010] [Accepted: 03/19/2010] [Indexed: 11/24/2022] Open
Abstract
Fluid overload, a common complication following cardiac surgery in infants is often difficult to manage. Dialysis can be used in severe cases, but may not be well tolerated. In such patients, peritoneal drainage could be an alternative option for fluid removal. We report the case of a newborn with a truncus arteriosus who developed postoperatively a complicated clinical course with right ventricular dysfunction, prerenal condition as well as fluid overload despite diuretic therapy. Dialysis was indicated for fluid removal. Peritoneal dialysis was started using a surgically placed Tenckhoff catheter and stopped due to inefficacy and leaks and no other modalities of dialysis were used. However, the catheter was left in place over a period of two months for fluid drainage and removed because of unexplained fever. In order to determine the effect of peritoneal drainage, we selected a period of one week before and one week after the removal of the drain to compare daily clinical data, urine electrolytes and renal function and found a positive effect on fluid balance control. We conclude that the fluid removal by continuous peritoneal drainage is a simple and safe alternative that can be used to control fluid balance in infants after cardiac surgery.
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Abstract
Extremely low birth-weight infants are prone to fluid and electrolyte imbalance due to multiple etiologies. Hypernatremia can occur in this gestational age group during the first week of life. One therapy that many NICUs initiate to treat hypernatremia is enteral sterile water feeds (SWFs). The use of free water is an adjunct therapy in place of large volumes of intravenous fluids. This article presents a review of renal physiology and 3 case studies of infants, less than 27 weeks' gestational age and less than 1000-g birth weight, treated with SWFs for hypernatremia. Commonalities and differences in treatment are addressed. There is limited evidence-based research using enteral SWFs for the treatment of hypernatremia.
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Le Compte A, Chase JG, Lynn A, Hann C, Shaw G, Wong XW, Lin J. Blood glucose controller for neonatal intensive care: virtual trials development and first clinical trials. J Diabetes Sci Technol 2009; 3:1066-81. [PMID: 20144420 PMCID: PMC2769904 DOI: 10.1177/193229680900300510] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Premature neonates often experience hyperglycemia, which has been linked to worsened outcomes. Insulin therapy can assist in controlling blood glucose (BG) levels. However, a reliable, robust control protocol is required to avoid hypoglycemia and to ensure that clinically important nutrition goals are met. METHODS This study presents an adaptive, model-based predictive controller designed to incorporate the unique metabolic state of the neonate. Controller performance was tested and refined in virtual trials on a 25-patient retrospective cohort. The effects of measurement frequency and BG sensor error were evaluated. A stochastic model of insulin sensitivity was used in control to provide a guaranteed maximum 4% risk of BG < 72 mg/dl to protect against hypoglycemia as well as account for patient variability over 1-3 h intervals when determining the intervention. The resulting controller is demonstrated in two 24 h clinical neonatal pilot trials at Christchurch Women's Hospital. RESULTS Time in the 72-126 mg/dl BG band was increased by 103-161% compared to retrospective clinical control for virtual trials of the controller, with fewer hypoglycemic measurements. Controllers were robust to BG sensor errors. The model-based controller maintained glycemia to a tight target control range and accounted for interpatient variability in patient glycemic response despite using more insulin than the retrospective case, illustrating a further measure of controller robustness. Pilot clinical trials demonstrated initial safety and efficacy of the control method. CONCLUSIONS A controller was developed that made optimum use of the very limited available BG measurements in the neonatal intensive care unit and provided robustness against BG sensor error and longer BG measurement intervals. It used more insulin than typical sliding scale approaches or retrospective hospital control. The potential advantages of a model-based approach demonstrated in simulation were applied to initial clinical trials.
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Affiliation(s)
- Aaron Le Compte
- Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand
| | - J. Geoffrey Chase
- Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand
| | - Adrienne Lynn
- Neonatal Department, Christchurch Women's Hospital, Christchurch, New Zealand
| | - Chris Hann
- Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand
| | - Geoffrey Shaw
- Department of Intensive Care, Christchurch Hospital, Christchurch, New Zealand
- Christchurch School of Medicine and Health Science, University of Otago, Christchurch, New Zealand
| | - Xing-Wei Wong
- Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand
| | - Jessica Lin
- Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand
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Abstract
Caring for the premature infant in the NICU requires knowledge and understanding of the physiologic adaptation to extrauterine life and how prematurity affects that transition. Nurses play an integral role in managing fluid and electrolyte balance in these infants. This article addresses postnatal adaptation and all aspects of fluid and electrolyte management of the preterm infant.
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Affiliation(s)
- Jean M Chow
- Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.
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Adaptation for life: a review of neonatal physiology. ANAESTHESIA AND INTENSIVE CARE MEDICINE 2008. [DOI: 10.1016/j.mpaic.2008.01.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ronco C, Ricci Z, Bellomo R, Baldwin I, Kellum J. Management of fluid balance in CRRT: a technical approach. Int J Artif Organs 2006; 28:765-76. [PMID: 16211526 DOI: 10.1177/039139880502800802] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND The possibility of making fluid balance errors during continuous renal replacement therapy has been identified since the beginning of this modality of treatment. The advent of automated machines has partially overcome this problem. Nevertheless, there are conditions and operation modes in which the potential for fluid balance errors is still present. OBJECTIVE To analyse fluid balance management in CRRT therapies across a range of currently marketed machine. METHODS The tests were conducted in vitro, utilizing saline solution for the blood circuit and regular dialysate/reinfusate for the dialysate/reinfusion circuit. The methodology used was based on the voluntary creation of a fluid balance error by altering the correct flow in the circuit of the different machines. Subsequently, the time for alarm occurrence and the threshold value for fluid balance error was evaluated. The alarm was overridden and the overall fluid error allowed by the machine was evaluated. Each machine was tested in conditions of different dialysate/filtrate flow rates and in different simulated treatment modalities. RESULTS Fluid balance errors can be easily avoided not only by a correct and careful adherence to the protocols of use of the current CRRT machines, but also by the compliance to prescriptions and programmed controls during therapy. Most importantly, if an alarm appears on the machine, one can try to override it without major problems; major problems may occur when multiple override commands are operated without identifying the problem and solving it adequately. CONCLUSION Machines seem to be designed with adequate safety features and accurate alarm systems. However, features and alarms can be manipulated by operators creating the opportunity for serious error. Physicians and nurses involved in prescription and delivery of CRRT should have precise protocols and defined procedures in relation to machine alarms to prevent major clinical problems.
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Affiliation(s)
- C Ronco
- Department of Nephrology, Dialysis and Transplantation, San Bortolo Hospital, Viale Rodolfi 37, 36100 Vicenza, Italy.
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