1
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Talukder MH, Takajo D, Kakkerala S, Kumar B. Case 2: Poor Weight Gain in a 9-month-old Girl. Pediatr Rev 2024; 45:333-337. [PMID: 38821892 DOI: 10.1542/pir.2022-005524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 07/11/2022] [Accepted: 07/12/2022] [Indexed: 06/02/2024]
Affiliation(s)
| | - Daiji Takajo
- Department of Pediatrics, Children's Hospital of Michigan, Detroit, MI
| | - Sushma Kakkerala
- Department of Pediatrics, Children's Hospital of Michigan, Detroit, MI
- Pediatric Hospitalists, Children's Hospital of Michigan, Central Michigan University, Mt Pleasant, MI
| | - Banu Kumar
- Department of Pediatrics, Children's Hospital of Michigan, Detroit, MI
- Pediatric Hospitalists, Children's Hospital of Michigan, Central Michigan University, Mt Pleasant, MI
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2
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Zieg J, Narla D, Gonsorcikova L, Raina R. Fluid management in children with volume depletion. Pediatr Nephrol 2024; 39:423-434. [PMID: 37452205 DOI: 10.1007/s00467-023-06080-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 06/06/2023] [Accepted: 06/26/2023] [Indexed: 07/18/2023]
Abstract
Volume depletion is a common condition and a frequent cause of hospitalization in children. Proper assessment of the patient includes a detailed history and a thorough physical examination. Biochemical tests may be useful in selected cases. Understanding the pathophysiology of fluid balance is necessary for appropriate management. A clinical dehydration scale assessing more physical findings may help to determine dehydration severity. Most dehydrated children can be treated orally; however, intravenous therapy may be indicated in patients with severe volume depletion, in those who have failed oral therapy, or in children with altered consciousness or significant metabolic abnormalities. Proper management consists of restoring circulatory volume and electrolyte balance. In this paper, we review clinical aspects, diagnosis, and management of children with volume depletion.
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Affiliation(s)
- Jakub Zieg
- Department of Pediatrics, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Deepti Narla
- Department of Pediatric Nephrology, Akron Children's Hospital, Cleveland, OH, USA
| | - Lucie Gonsorcikova
- Department of Pediatrics, First Faculty of Medicine, Charles University in Prague and Thomayer University Hospital, Prague, Czech Republic
| | - Rupesh Raina
- Department of Pediatric Nephrology, Akron Children's Hospital, Cleveland, OH, USA.
- Cleveland Clinic Akron General Medical Center, Akron, OH, USA.
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3
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Amer BE, Abdelwahab OA, Abdelaziz A, Soliman Y, Amin AM, Mohamed MA, Albakri K, Zedan EM, Hamouda N. Efficacy and safety of isotonic versus hypotonic intravenous maintenance fluids in hospitalized children: an updated systematic review and meta-analysis of randomized controlled trials. Pediatr Nephrol 2024; 39:57-84. [PMID: 37365423 PMCID: PMC10673968 DOI: 10.1007/s00467-023-06032-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/11/2023] [Accepted: 05/15/2023] [Indexed: 06/28/2023]
Abstract
BACKGROUND Iatrogenic hyponatremia is a common complication following intravenous maintenance fluid therapy (IV-MFT) in hospitalized children. Despite the American Academy of Pediatrics' 2018 recommendations, IV-MFT prescribing practices still vary considerably. OBJECTIVES This meta-analysis aimed to compare the safety and efficacy of isotonic versus hypotonic IV-MFT in hospitalized children. DATA SOURCES We searched PubMed, Scopus, Web of Science, and Cochrane Central from inception to October 1, 2022. STUDY ELIGIBILITY CRITERIA We included randomized controlled trials (RCTs) comparing isotonic versus hypotonic IV-MFT in hospitalized children, either with medical or surgical conditions. Our primary outcome was hyponatremia following IV-MFT. Secondary outcomes included hypernatremia, serum sodium, serum potassium, serum osmolarity, blood pH, blood sugar, serum creatinine, serum chloride, urinary sodium, length of hospital stay, and adverse outcomes. STUDY APPRAISAL AND SYNTHESIS METHODS Random-effects models were used to pool the extracted data. We performed our analysis based on the duration of fluid administration (i.e., ≤ 24 and > 24 h). The Grades of Recommendations Assessment Development and Evaluation (GRADE) scale was used to evaluate the strength and level of evidence for recommendations. RESULTS A total of 33 RCTs, comprising 5049 patients were included. Isotonic IV-MFT significantly reduced the risk of mild hyponatremia at both ≤ 24 h (RR = 0.38, 95% CI [0.30, 0.48], P < 0.00001; high quality of evidence) and > 24 h (RR = 0.47, 95% CI [0.37, 0.62], P < 0.00001; high quality of evidence). This protective effect of isotonic fluid was maintained in most examined subgroups. Isotonic IV-MFT significantly increased the risk of hypernatremia in neonates (RR = 3.74, 95% CI [1.42, 9.85], P = 0.008). In addition, it significantly increased serum creatinine at ≤ 24 h (MD = 0.89, 95% CI [0.84, 0.94], P < 0.00001) and decreased blood pH (MD = -0.05, 95% CI [-0.08 to -0.02], P = 0.0006). Mean serum sodium, serum osmolarity, and serum chloride were lower in the hypotonic group at ≤ 24 h. The two fluids were comparable in terms of serum potassium, length of hospital stay, blood sugar, and the risk of adverse outcomes. LIMITATIONS The main limitation of our study was the heterogeneity of the included studies. CONCLUSIONS AND IMPLICATIONS OF KEY FINDINGS Isotonic IV-MFT was superior to the hypotonic one in reducing the risk of iatrogenic hyponatremia in hospitalized children. However, it increases the risk of hypernatremia in neonates and may lead to renal dysfunction. Given that the risk of hypernatremia is not important even in the neonates, we propose to use balanced isotonic IV-MFT in hospitalized children as it is better tolerated by the kidneys than 0.9% saline. SYSTEMATIC REVIEW REGISTRATION NUMBER CRD42022372359. Graphical abstract A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Basma Ehab Amer
- Medical Research Group of Egypt, Cairo, Egypt.
- Faculty of Medicine, Benha University, Benha, Egypt.
| | - Omar Ahmed Abdelwahab
- Medical Research Group of Egypt, Cairo, Egypt
- Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Ahmed Abdelaziz
- Medical Research Group of Egypt, Cairo, Egypt
- Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Youssef Soliman
- Medical Research Group of Egypt, Cairo, Egypt
- Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Ahmed Mostafa Amin
- Medical Research Group of Egypt, Cairo, Egypt
- Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Maged Ahmed Mohamed
- Medical Research Group of Egypt, Cairo, Egypt
- Faculty of Medicine, The Hashemite University, Zarqa, Jordan
| | - Khaled Albakri
- Medical Research Group of Egypt, Cairo, Egypt
- Faculty of Dentistry, Al-Azhar University, Cairo, Egypt
| | - Esraa Mohamed Zedan
- Medical Research Group of Egypt, Cairo, Egypt
- Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Naema Hamouda
- Medical Research Group of Egypt, Cairo, Egypt
- General Organization of Teaching Hospitals and Institutes, Cairo, Egypt
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4
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Huang J, Qiu Y, Lücke F, Su J, Grundmeier G, Keller A. Multiprotein Adsorption from Human Serum at Gold and Oxidized Iron Surfaces Studied by Atomic Force Microscopy and Polarization-Modulation Infrared Reflection Absorption Spectroscopy. Molecules 2023; 28:6060. [PMID: 37630312 PMCID: PMC10459451 DOI: 10.3390/molecules28166060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
Multiprotein adsorption from complex body fluids represents a highly important and complicated phenomenon in medicine. In this work, multiprotein adsorption from diluted human serum at gold and oxidized iron surfaces is investigated at different serum concentrations and pH values. Adsorption-induced changes in surface topography and the total amount of adsorbed proteins are quantified by atomic force microscopy (AFM) and polarization-modulation infrared reflection absorption spectroscopy (PM-IRRAS), respectively. For both surfaces, stronger protein adsorption is observed at pH 6 compared to pH 7 and pH 8. PM-IRRAS furthermore provides some qualitative insights into the pH-dependent alterations in the composition of the adsorbed multiprotein films. Changes in the amide II/amide I band area ratio and in particular side-chain IR absorption suggest that the increased adsorption at pH 6 is accompanied by a change in protein film composition. Presumably, this is mostly driven by the adsorption of human serum albumin, which at pH 6 adsorbs more readily and thereby replaces other proteins with lower surface affinities in the resulting multiprotein film.
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Affiliation(s)
| | | | | | | | | | - Adrian Keller
- Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, 33098 Paderborn, Germany; (J.H.); (Y.Q.); (F.L.); (J.S.); (G.G.)
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5
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Berska J, Bugajska J, Sztefko K. The accuracy of serum osmolarity calculation in small children. J Med Biochem 2023; 42:67-77. [PMID: 36819138 PMCID: PMC9920940 DOI: 10.5937/jomb0-37490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 06/18/2022] [Indexed: 11/02/2022] Open
Abstract
Background Serum osmolality can be measured (Omeas) or calculated (Ocal). Many formulas for Ocal have been already published, but data regarding the most accurate equation in small babies is not available. Thus, we aim to compare Omeas and Ocal obtained by different formulas in newborns and small children. Methods The study included 280 serum samples taken from children, from the first day of life to 2 years (mean age 8.2 ± 7.6 months) treated in the University Children's Hospital in Krakow. The serum osmolality was measured by osmometer and calculated by 8 common formulas. Results The mean value of Omeas (2 8 5 .8 ± 5 .1 mOsm/kgH2O) was significantly different as compared to the mean values of Ocal (p< 0.01) for all formulas, except Ocal obtained by the formula: 1.86*(N a + K) +1.15*Glu + Urea + 14. According to Bland-Altman analysis, this formula showed the best performance for estimating osmolality. In children under 3 months of life Passing-Bablok regression indicated both systematic and proportional error for results obtained by each formula compared to the measured values. Conclusions To calculate osmolarity in children aged between 3 months and 2 years old the following equation: 1 .86*(N a + K) + 1.1 5*G lu+ U rea+ 14 might be used, whereas serum osmolality in children up to 3 month of life should be measured.
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Affiliation(s)
- Joanna Berska
- Jagiellonian University College of Medicine, Institute of Pediatrics, Clinical Biochemistry Department, Krakow, Poland
| | - Jolanta Bugajska
- Jagiellonian University College of Medicine, Institute of Pediatrics, Clinical Biochemistry Department, Krakow, Poland
| | - Krystyna Sztefko
- Jagiellonian University College of Medicine, Institute of Pediatrics, Clinical Biochemistry Department, Krakow, Poland
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6
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Abstract
Optimal hydration is required for all physiologic functions and cognition. Children, especially younger ones, are particularly susceptible to dehydration, given their physiological specificities, in particular, their renal immaturity and relatively large skin surface in early life, but also their dependence on adults and their greater propensity to develop digestive diseases leading to fluid losses. Mild dehydration consequences are dominated by their impact on cognitive functions, whereas more severe dehydration may endanger the health outcome. Studies on this subject in children are scarce; in particular, the long-term consequence on renal function remains questionable. This review considers how children's water intake including fluid intake and water content of food, are worrying. The findings show that, worldwide, most children do not meet adequate water intake recommendations. The main problems likely to explain insufficient water intake are access to safe water, availability of drinking water at school, and healthy-hydration education, which are all points that need to be improved within health policy.
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Affiliation(s)
- Jean-Pierre Chouraqui
- Paediatric Nutrition and Gastroenterology, Division of Pediatrics, Woman, Mother and Child Department, Pediatric Nutrition and Gastroenterology Unit, University Hospital of Lausanne (CHUV), Lausanne, Switzerland
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7
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Ratnjeet K, Pallavi P, Jhamb U, Saxena R. 0.45% Versus 0.9% Saline in 5% Dextrose as Maintenance Fluids in Children Admitted With Acute Illness: A Randomized Control Trial. Pediatr Emerg Care 2022; 38:436-441. [PMID: 36040464 DOI: 10.1097/pec.0000000000002621] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND The safety of giving intravenous (IV) maintenance fluids according to Holliday and Segar's recommendations of 1957 has recently been questioned after reports of complications caused by iatrogenic hyponatremia in children receiving hypotonic fluids. However, the current practice of choice of maintenance IV fluids for hospitalized children varies worldwide. This study was planned to compare 0.45% and 0.9% saline in 5% dextrose at standard maintenance rates in hospitalized children aged 3 months to 12 years. OBJECTIVE Primary objective was to study change in serum sodium level at 24 hours in children receiving total IV fluid maintenance therapy as 0.45% or 0.9% normal saline in 5% dextrose. Secondary objectives of this study were to estimate change in serum sodium levels from the baseline to 48 or 72 hours, if IV fluids were continued, and to find incidence of hyponatremia and hypernatremia after administering these 2 types of maintenance fluids. METHODS This study was an open-label, randomized control trial conducted at the Department of Pediatrics of a tertiary care hospital from July 22, 2019, to October 28, 2019. Two hundred children aged 3 months to 12 years admitted in pediatric emergency and requiring IV maintenance fluid were randomized into 2 groups (group A received 0.45% saline in 5% dextrose, group B received 0.9% normal saline in 5% dextrose) with 100 in each group. RESULTS Both groups were comparable for baseline characteristics. Fall in mean serum sodium from baseline was more with increasing duration of IV fluids until 24 hours in 0.45% saline group as compared with 0.9% saline group, which was statistically significant (P < 0.001). The incidence of mild and moderate hyponatremia was significantly more in hypotonic group at 12 hours (P < 0.001) and 24 hours (P < 0.001). However, there was no significant difference at 48 hours. CONCLUSIONS The fall in serum sodium values was significant, and there was significant risk of hyponatremia with the use of hypotonic fluids at 12 and 24 hours. Hence, the use of isotonic fluids seems to be more appropriate among the hospitalized children.Trial Registration: CTRI/2019/10/021791.
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Affiliation(s)
- Kumar Ratnjeet
- From the Department of Pediatrics, Maulana Azad Medical College, New Delhi, India
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8
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Takakura I, Kishida T, Yokoi R, Souma S. Estradiol dominance induces hemodilution and mild hematological alterations in mifepristone-treated rats. J Toxicol Sci 2022; 47:301-308. [PMID: 35786681 DOI: 10.2131/jts.47.301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
We examined that an estradiol-dominant state against progesterone could affect hematological parameters through hemodilution because estradiol is known to increase plasma volume via oncotic pressure. We performed a 2- and 3-week repeated oral dose study with mifepristone, a progesterone receptor antagonist, in female rats and examined erythrocyte counts, hemoglobin, hematocrit, plasma volume, levels of estradiol and progesterone, water intake, and water loss. Mifepristone treatment decreased some hematological parameters mildly and increased plasma volume. There were no remarkable changes in the balance of water intake and water loss through urination. Both estradiol and progesterone levels and the ratio of estradiol to progesterone increased. Therefore, our findings indicate that repeated mifepristone treatment increases estradiol levels and plasma volume, resulting in lower erythrocyte counts, hemoglobin, and hematocrit. The present study proved the possible contribution of estradiol to understanding the toxicological significance of mifepristone-induced hemodilution.
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Affiliation(s)
- Ikuro Takakura
- Safety Research Department, R&D, Kissei Pharmaceuticals Co., Ltd
| | - Tomoyuki Kishida
- Safety Research Department, R&D, Kissei Pharmaceuticals Co., Ltd
| | - Ryohei Yokoi
- Safety Research Department, R&D, Kissei Pharmaceuticals Co., Ltd
| | - Shinji Souma
- Safety Research Department, R&D, Kissei Pharmaceuticals Co., Ltd
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9
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Alexander E, Weatherhead J, Creo A, Hanna C, Steien DB. Fluid management in hospitalized pediatric patients. Nutr Clin Pract 2022; 37:1033-1049. [PMID: 35748381 DOI: 10.1002/ncp.10876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/28/2022] [Accepted: 05/21/2022] [Indexed: 11/09/2022] Open
Abstract
The proper use of intravenous fluids has likely been responsible for saving more lives than any other group of substances. Proper use includes prescribing an appropriate electrolyte and carbohydrate solution, at a calculated rate or volume, for the right child, at the right time. Forming intravenous fluid plans for hospitalized children requires an understanding of water and electrolyte physiology in healthy children and how different pathology deviates from the norm. This review highlights fluid management in several disease types, including liver disease, diabetic ketoacidosis, syndrome of inappropriate antidiuretic hormone, diabetes insipidus, kidney disease, and intestinal failure as well as in those with nonphysiologic fluid losses. For each disease, the review discusses specific considerations, evaluations, and management strategies to consider when customizing intravenous fluid plans. Ultimately, all hospitalized children should receive an individualized fluid plan with recurrent evaluations and fluid modifications to provide optimal care.
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Affiliation(s)
- Erin Alexander
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Department of Pediatric and Adolescent Medicine, Mayo Clinic Children's Center, Rochester, Minnesota, USA.,Division of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Jeffrey Weatherhead
- Division of Pediatric Critical Care, Department of Pediatric and Adolescent Medicine, Mayo Clinic Children's Center, Rochester, Minnesota, USA
| | - Ana Creo
- Division of Pediatric Endocrinology, Department of Pediatric and Adolescent Medicine, Mayo Clinic Children's Center, Rochester, Minnesota, USA
| | - Christian Hanna
- Division of Pediatric Nephrology and Hypertension, Department of Pediatric and Adolescent Medicine, Mayo Clinic Children's Center, Rochester, Minnesota, USA.,Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic Children's Center, Rochester, Minnesota, USA
| | - Dana B Steien
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Department of Pediatric and Adolescent Medicine, Mayo Clinic Children's Center, Rochester, Minnesota, USA
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10
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Zieg J. Diagnosis and management of hypernatraemia in children. Acta Paediatr 2022; 111:505-510. [PMID: 34716953 DOI: 10.1111/apa.16170] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 10/25/2021] [Accepted: 10/28/2021] [Indexed: 11/30/2022]
Abstract
Hypernatraemia is most commonly caused by excessive loss of solute-free water or decreased fluid intake; less often, the aetiology is salt intoxication. Especially infants, young children and individuals with a lack of access to water are at risk of developing hypernatraemia. Diagnosis is based on detailed history, physical examination and basic laboratory tests. Correction of hypernatraemia must be slow to prevent cerebral oedema and irreversible brain damage. This article reviews the aetiology, differential diagnosis and management of conditions associated with paediatric hypernatraemia. Distinguishing states with water deficiency from states with salt excess is important for proper management of hypernatraemic patients.
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Affiliation(s)
- Jakub Zieg
- Department of Paediatrics Second Medical Faculty Motol University HospitalCharles University Prague Czech Republic
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11
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Shokoohi-Rad S, Shoeibi N, Ghasemi Nour M, Bakhtiari E. Evaluation of the Effect of Religious Fasting on Retinal Vessel Density and Retinal Thickness Using Optical Coherence Tomography Angiography. Neuroophthalmology 2021; 46:147-153. [DOI: 10.1080/01658107.2021.1995442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Saeed Shokoohi-Rad
- Eye Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Nasser Shoeibi
- Eye Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Ghasemi Nour
- Eye Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Science, Mashhad, Iran
| | - Elham Bakhtiari
- Eye Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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12
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Mathew A, Rai E. Pediatric perioperative fluid management. Saudi J Anaesth 2021; 15:435-440. [PMID: 34658733 PMCID: PMC8477784 DOI: 10.4103/sja.sja_140_21] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 03/02/2021] [Indexed: 11/12/2022] Open
Abstract
Appropriate fluid management is vital for adequate tissue perfusion and balancing the internal milieu especially in perioperative settings and critically ill children. Pediatric population is heterogeneous so one formula may not suffice and hence both the quantitative and qualitative perspective of fluid management should be based on physiology and pathology of the child along with their perioperative needs. In perioperative setup, the fluid is administered to meet fluid deficits (fasting, and other daily based losses), blood losses and third space losses. Anesthetists have always followed pediatric maintenance fluid calculations based on Holiday and Segar formula; based on studies conducted on healthy children more than 70 years ago. Recently, there has been a lot of debate about this concept, especially as there are serious concerns regarding the development of complications like hyponatremia and hyperglycemia, both of which can result in neurological damage or even mortality in a sick child. This review is an attempt to provide a historical perspective and current evidence-based approach to peri-operative pediatric fluid management. We performed a PUBMED search for articles using keywords including ‘children’, ‘intravenous fluid therapy’, ‘crystalloids’, ‘colloids’, ‘fluid homeostasis’, ‘blood loss’, ‘estimation of blood loss’, ‘blood loss management’, ‘perioperative fluid ‘ to get our source articles.
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Affiliation(s)
- Amit Mathew
- Department of Anaesthesia, Christian Medical College, Vellore, Tamil Nadu, India
| | - Ekta Rai
- Department of Anaesthesia, Christian Medical College, Vellore, Tamil Nadu, India
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13
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Morzy D, Rubio-Sánchez R, Joshi H, Aksimentiev A, Di Michele L, Keyser UF. Cations Regulate Membrane Attachment and Functionality of DNA Nanostructures. J Am Chem Soc 2021; 143:7358-7367. [PMID: 33961742 PMCID: PMC8154537 DOI: 10.1021/jacs.1c00166] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
![]()
The interplay between nucleic acids
and lipids underpins several
key processes in molecular biology, synthetic biotechnology, vaccine
technology, and nanomedicine. These interactions are often electrostatic
in nature, and much of their rich phenomenology remains unexplored
in view of the chemical diversity of lipids, the heterogeneity of
their phases, and the broad range of relevant solvent conditions.
Here we unravel the electrostatic interactions between zwitterionic
lipid membranes and DNA nanostructures in the presence of physiologically
relevant cations, with the purpose of identifying new routes to program
DNA–lipid complexation and membrane-active nanodevices. We
demonstrate that this interplay is influenced by both the phase of
the lipid membranes and the valency of the ions and observe divalent
cation bridging between nucleic acids and gel-phase bilayers. Furthermore,
even in the presence of hydrophobic modifications on the DNA, we find
that cations are still required to enable DNA adhesion to liquid-phase
membranes. We show that the latter mechanism can be exploited to control
the degree of attachment of cholesterol-modified DNA nanostructures
by modifying their overall hydrophobicity and charge. Besides their
biological relevance, the interaction mechanisms we explored hold
great practical potential in the design of biomimetic nanodevices,
as we show by constructing an ion-regulated DNA-based synthetic enzyme.
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Affiliation(s)
- Diana Morzy
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Roger Rubio-Sánchez
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Himanshu Joshi
- Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801, United States
| | - Aleksei Aksimentiev
- Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801, United States.,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, Illinois 61801, United States
| | - Lorenzo Di Michele
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.,Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, London W12 0BZ, United Kingdom
| | - Ulrich F Keyser
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
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14
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Distribution of plasma copeptin levels and influence of obesity in children and adolescents. Eur J Pediatr 2021; 180:119-126. [PMID: 32809080 PMCID: PMC7782451 DOI: 10.1007/s00431-020-03777-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 08/04/2020] [Accepted: 08/10/2020] [Indexed: 02/07/2023]
Abstract
In recent years, a more stable AVP surrogate, called copeptin, has been used as an adjuvant diagnostic tool for dysnatremia in adults and appears to be promising even in the pediatric age. The aim of this study is to present the distribution of plasma copeptin in a large pediatric cohort and to observe the influence of fluid consumption and obesity on its values. A cohort of 128 children and adolescents was divided into two groups on the basis of nocturnal deprivation (group A) or free access to oral fluids in the 6-8 h before blood collection (group B). At all distribution percentiles, copeptin levels were higher (p < 0.0001) in group A, as were plasma sodium levels and osmolality (p = 0.02 and p = 0.008, respectively). The influence of BMI on copeptin levels was investigated by dividing the cohort into nonobese (group C) and obese children and adolescents (group D). Copeptin levels were higher in group D (p = 0.04).Conclusion: The measurement of copeptin could represent a useful tool for the diagnostic pathway of dysnatremic conditions, but its interpretation should take into consideration the state of hydration. Furthermore, it could also be a promising marker for obesity and metabolic syndrome, although this hypothesis needs further studies to be confirmed. What is Known: • Copeptin use as a diagnostic tool in AVP-related disorders, such as diabetes insipidus or syndrome of inappropriate secretion of antidiuretic hormone, is well established in adults • In pediatric age, few studies are available, but the preliminary data, including our previous study, seems to be promising. What is New: • In this study, we represent the distribution of copeptin levels in a pediatric cohort and show the significant influence of fluid ingestion on its plasma levels. • Also BMI seems to be a significant variable on copeptin levels and may be used as an obesity marker in pediatric age.
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15
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Cantú Rodríguez JM, Puente Ramírez NP, Montes Tapia FF, Torres Treviño LM. Acquisition of skin characteristics by Monte Carlo modeling and evolutionary setting of parameters. Skin Res Technol 2020; 26:740-748. [DOI: 10.1111/srt.12866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/17/2020] [Accepted: 02/29/2020] [Indexed: 11/29/2022]
Affiliation(s)
- José Mario Cantú Rodríguez
- Facultad de Ingeniería Mecánica y Eléctrica Universidad Autónoma de Nuevo León San Nicolás de los Garza México
| | | | | | - Luis Martín Torres Treviño
- Facultad de Ingeniería Mecánica y Eléctrica Universidad Autónoma de Nuevo León San Nicolás de los Garza México
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16
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Abstract
Fluid and blood administration are required during surgery in children. The type, amount and tonicity of the intravenous fluids is an important aspect to be considered during anaesthesia management. The physiological differences between adults and children regarding the body water and blood volume needs to be understood. We performed a PUBMED search for English language articles using keywords including 'children', 'intravenous fluid therapy', 'crystalloids', 'colloids', 'fluid homeostasis', 'Starling equation', 'Donnan effect', 'blood loss', 'estimation of blood loss', 'blood management program'. This review discusses the physiological basis, historical background, risk of hyponatraemia, need of glucose in the intravenous fluids as well as the recent concepts in blood transfusion as related to children.
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Affiliation(s)
- Neerja Bhardwaj
- Department of Anaesthesia and Intensive Care, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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17
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Abstract
The implications and management of fluid overload in pediatric critical care remain areas of ongoing controversy. Consensus definitions and methods of quantitating fluid overload continue to evolve, paralleling our growing understanding of fluid dynamics in critically ill patients. Fluid overload has been associated with adverse outcomes in some patient populations; guidelines for fluid management therapies are sparse and have little supporting data. Conflicting data for efficacy of therapies such as diuretic medications and renal replacement therapy are likely reflective of an incomplete understanding of the dynamic relationship between critical illness and fluid overload. Although some guidance regarding diuresis, continuous renal replacement therapy, and fluid balance goals is elucidated in the following chapters, it is important to recognize that further research into these management strategies is required before standardized approaches to management can be established.
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Affiliation(s)
| | - Kevin M. Valentine
- Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, IN USA
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18
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Abstract
The survival of a child with severe volume depletion at the emergency department depends on the competency of the first responder to recognize and promptly treat hypovolemic shock. Although the basic principles on fluid and electrolytes therapy have been investigated for decades, the topic remains a challenge, as consensus on clinical management protocol is difficult to reach, and more adverse events are reported from fluid administration than for any other drug. While the old principles proposed by Holliday and Segar, and Finberg have stood the test of time, recent systematic reviews and meta-analyses have highlighted the risk of hyponatraemia, and hyponatraemic encephalopathy in some children treated with hypotonic fluids. In the midst of conflicting literature on fluid and electrolytes therapy, it would appear that isotonic fluids are best suitable for the correction of hypotonic, isonatraemic, and hypernatraemic dehydration. Although oral rehydration therapy is adequate to correct mild to moderate isonatraemic dehydration, parenteral fluid therapy is safer for the child with severe dehydration and those with changes in serum sodium. The article reviews the pathophysiology of water and sodium metabolism and, it uses the clinical case examples to illustrate the bed-side approach to the management of three different types of dehydration using a pre-mixed isotonic fluid solution (with 20 or 40 mmol/L of potassium chloride added depending on the absence or presence of hypokalemia, respectively). When 3% sodium chloride is unavailable to treat hyponatraemic encephalopathy, 0.9% sodium chloride becomes inevitable, albeit, a closer monitoring of serum sodium is required. The importance of a keen and regular clinical and laboratory monitoring of a child being rehydrated is emphasized. The article would be valuable to clinicians in less-developed countries, who must use pre-mixed fluids, and who often cannot get some suitable rehydrating solutions.
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Affiliation(s)
- Emmanuel Ademola Anigilaje
- Nephrology Unit, Department of Paediatrics, College of Health Sciences, University of Abuja, Abuja, Nigeria
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19
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Abstract
Hyponatremia is a common electrolyte disorder in children. It is generally defined as plasma sodium of less than 135 mmol/l. Sodium homeostasis is essential for maintaining intravascular volume and is tightly linked to water balance. Plasma water volume is regulated mainly by the secretion of an antidiuretic hormone (ADH) and by the thirst mechanism. ADH is synthesized in the hypothalamus and stored in the posterior hypophysis. It binds to V2 receptors in the distal nephron and induces translocation of aquaporin water channels in the plasma membrane to retain water. There are two main types of receptors involved in the control of the body water balance-osmoreceptors and baroreceptors. Osmoreceptors reside in hypothalamus and respond to changes of extracellular fluid (ECF) osmolality. Baroreceptors are mechanoreceptors that sense blood pressure in the vessel wall. Response reflexes from baroreceptors influence sympathetic outflow, vessel tonus, and cardiac output. An increase of 1% of plasma osmolality may cause an increase in ADH levels, while the threshold of volume receptors for ADH secretion is higher. However, significant hypotension is a more potent stimulus for ADH secretion than increased osmolality. The main cause of pediatric hyponatremia is an abundance of free water. This may occur in hypovolemic children with low ECF volume, normovolemic patients with inappropriately increased ADH secretion, and also in hypervolemic individuals with decreased effective circulating volume and appropriately increased ADH levels. Proper understanding of the pathophysiology of hyponatremic states is essential for establishing the correct diagnosis and appropriate therapy.
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Affiliation(s)
- Jakub Zieg
- Second Faculty of Medicine, Department of Pediatrics, Motol University Hospital, Charles University in Prague, Praha, Czechia
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