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801 | discourages eating in the pres ence of distractions such as television, tablets, mobile devices, and other screens and eating in a car where an adult cannot adequately observe and assist the child. FEEDING SCHOOL AGED CHILDREN AND ADOLESCENTS MyPlate The U.S. Department of Agriculture (USDA) MyPlate (www.myplate.gov) i... |
802 | than what is generally thought to be healthy. BMI looks at the way height and weight are balanced with each other. Currently your childs BMI is too low, which has a higher risk of developing health problems related to weight. Looking at how your childs weight is matched for their height, 75 of 100 children are at a wei... |
803 | eat because they typically shop for groceries and monitor which foods are available in the household. Home food availability is associated with child dietary intake: availability of foods such as fruits, vegetables, and dairy has been associated with intake of those foods, whereas availability of foods such as sugar sw... |
804 | industry involvement. Parents are encouraged to assist their child with food choices at school. If children bring their lunch from home, lunch should include, at a minimum, a fruit andor vegetable, a whole grain, and a protein source. Parents can be directed to www.myplate.gov for healthful lunch ideas. Additionally, p... |
805 | these occasions, diet quality can suffer because food offerings are typically of low nutri tional value. Parents and pediatricians need to guide children and teens in navigating these occasions while maintaining a healthful diet and enjoying meaningful social interactions. These occasions may also be opportunities for ... |
806 | identify appropriate alternative rewards. Cultural Considerations in Nutrition and Feeding Food choices, food preparation, eating patterns, and infant feeding practices all have very deep cultural roots. Beliefs, attitudes, and prac tices related to food and eating are some of the most important com ponents of cultural... |
807 | how much. Sit and eat with the child. Encourage child to try what is on the plate. Notice when child attempts to try a food: You tried your broccoli, or good job trying your broccoli. Allow child to graze or eat small bites throughout the day. Allow child to eat whatever they want. Make child eat all of the food on the... |
808 | and yogurts and some brands of orange juice. Zinc: The bioavailability of zinc in plant sources tends to be low be cause of the presence of phytates and fiber that inhibit zinc absorp tion (see Chapter 72). Zinc is found in soy products, legumes, grains, cheese, and nuts. Iodine: Plant based diets can be low in iodine,... |
809 | recreational facilities Family leisure time activity School physical education programs Crime rates and neighborhood safety Socioeconomic status Accessibility of convenience foods and restaurants Child weight status Child characteristics and child risk factors Parenting styles and family characteristics Community, demo... |
810 | to avoid barley and rye Advise alternative sources of grains, e.g., oats, rice, corn, quinoa, teff, and buckwheat Check if wheat substitute foods (glutenfree products) are being eaten B vitamin and iron supplements may be required Wheat Avoidance If vegetarian, ensure diet is enhanced with other highprotein foods inclu... |
811 | provides the FDA with authority to have stricter control over food produc tion and distribution, including requirements that manufacturers develop food safety plans. A good source of information for patients and parents can be found at www.foodsafety.gov. Other reliable sources of information include the websites of th... |
812 | most useful websites for children are the AAP and USDA MyPlate sites and those of the CDC, FDA, National Institutes of Health, The National Academies, and Food and Nutrition Board for government sources. Other professional resources include the American Heart Association and Academy of Nutrition and Dietet ics. Unfortu... |
813 | of health and watersanita tion services. In famine and emergency settings, food shortage is the foremost factor, but in many countries with widespread undernutri tion, food production or access to food might not be the most limiting factor. More important causes might be repeated childhood infections, especially diarrh... |
814 | does not take nutrient adequacy into account, but has the advantage of being available for almost all countries annually (although with a time lag) and assists in monitoring global trends. In addition, FAO measures food access by asking individuals about their experiences over the last 12 months, such as whether they r... |
815 | (MDGs) ended in 2015. All developing regions except sub Saharan Africa achieved the tar get to halve the proportion of people living in extreme poverty, with the proportion falling from 47 in 1990 to 14 in 2015. Reductions in hun ger were broadly consistent with those of poverty reduction, and rates of undernourishment... |
816 | in 2 Philadelphia area infants fed Rice Dream beverage. J Am Acad Derma tol. 2005;52:S69S72.) Fig. 62.3 Paired, transverse, homogeneous, and smooth bordered lines noted in all fingernails suggestive of Muehrcke lines in an infant fed diluted cows milk since birth. Muehrcke lines are an apparent leukonychia most often a... |
817 | encompasses both ends of the nutrition spec trum, undernutrition as well as overweight and obesity. Many poor nutritional outcomes begin in utero and are manifest as low birth weight (LBW, 2,500 g). Preterm birth and fetal growth restriction are the two main causes of LBW, with prematurity relatively more common in ric... |
818 | Subclinical deficiency is defined as serum retinol concentration 0.70 molL. Vitamin A deficiency is the leading cause of preventable blind ness in children. It is also associated with a higher morbidity and mor tality among young children. Table 62.2 Classification of Undernutrition CLASSIFICATION INDEX GRADING Gomez (... |
819 | blood sample was obtained in the morning in a fasted state, the morning in a nonfasted state, or in the afternoon in a non fasted state, respectively. Prevalence of Undernutrition It is estimated that approximately 14.6 of births worldwide in 2015 were LBW. Rates of LBW are highest (48) in southern Asia, which are twic... |
820 | damage as a result of undernutrition can affect their future health and economic well being. For females, the cycle of undernutrition is passed on to the next generation when under nourished women give birth to LBW babies. Fetal growth restriction and early childhood undernutrition have con sequences for adult chronic ... |
821 | deprivation. Interventions for Undernutrition Interventions to address child undernutrition can be divided into those that address immediate causes (nutrition specific interventions) and those that address underlying or indirect causes (nutrition sensitive interven tions) (Table 62.5). In the short term, nutrition spec... |
822 | Victora CG, Walker SP, et al. Maternal and child undernutrition and overweight in low and middle income countries. Lancet. 2013;382:427451. Table 62.5 Examples of Nutrition Specific and Nutrition Sensitive Interventions NUTRITION SPECIFIC INTERVENTIONS NUTRITION SENSITIVE INTERVENTIONS Promotion and support for exclusi... |
823 | (dent) remaining under each thumb indicates bilateral edema. This definition of severe acute malnutrition distinguishes wasted edematous children from those who are stunted because stunted children (although underweight) are not a priority for acute clinical care because their deficits in height and weight cannot be co... |
824 | changes typically occur over the swollen limbs and include dark, crackled peeling patches (flaky paint dermatosis) with pale skin underneath that is easily infected (see Figs. 62.2 and 62.6). The hair is sparse, easily pulled out, and may lose its curl. In dark haired children, the hair may turn pale or reddish. The li... |
825 | sodium potassium pump, leading to excess body sodium, fluid retention, and edema. u Potassium leaks out of cells and is excreted in urine, contributing to electrolyte imbalance, fluid retention, edema, and anorexia. u Loss of muscle protein is accompanied by loss of potassium, magne sium, zinc, and copper. u The gut pr... |
826 | for malnourished children with shock and other emergency conditions. Note that treatment of shock in these children is different (less rapid, smaller volume, different fluid) from treatment of shock in well nourished children. However, shock from dehydration and shock from sepsis often coexist and are difficult to diff... |
827 | give 5 7 mLkg packed cells rather than whole blood. 2. Give furosemide 1 mgkg IV at the start of the transfusion. Emergency eye care Corneal ulceration If corneal ulceration: 1. Give vitamin A immediately (age 6 mo: 50,000 IU; 6 12 mo: 100,000 IU; 12 mo: 200,000 IU) 2. Instill 1 drop atropine (1) into affected eye to r... |
828 | unless the child is in shock. 1. Give ReSoMal 5 mLkg every 30 min for first 2 hr orally or NG tube. 2. Then give 5 10 mLkg in alternate hours for up to 10 hr. Amount depends on stool loss and eagerness to drink. Feed in the other alternate hour. 3. Monitor hourly and stop if signs of overload develop (pulse rate increa... |
829 | usual signs (e.g., slow skin pinch, sunken eyes) may be present even without dehydration. Rehydration must therefore be closely monitored for signs of fluid overload. Serum electrolyte levels can be misleading because of sodium leaking from the blood into cells and potassium leaking out of cells. Keeping the intake of ... |
830 | once daily for 7 days and Ampicillin, 50 mgkg IV or IM every 6 hr for 2 days, then amoxicillin, 25 40 mgkg PO every 8 hr for 5 days If specific infections are identified, add appropriate antibiotics. For persistent diarrhea or small bowel overgrowth, add metronidazole, 7.5 mgkg PO every 8 hr for 7 days. Local resistanc... |
831 | inpatient care (left) and outpatient care (right) in the child with severe acute malnutrition. MUAC, Mid upper arm circumference. Refeeding syndrome occurs in response to reintroduction of nutri tion in the malnourished patient. Rapid electrolyte and fluid shifts in response to the surge of insulin brought on by the pr... |
832 | sugar. Pathogens cannot grow in it because of its low moisture content. Hospitalized children who have completed steps 1 7 can be transferred to community based care for completion of their rehabilitation, thereby reducing their hospital stay to about 7 10 days. Visit Elsevier eBooks at eBooks.Health.Elsevier.com for B... |
833 | 1.7 mgdL; Mag oxide 2 tablets (133 200 mg elemental Mg each) bid for magnesium 1.0 1.2 mgdL; and IV Mg SO4 50 mgkg; max 2 g dose and consider intensive care consultation for magnesium 1.0 mgdL. Declining electrolytes but within the normal range gener ally do not need to be treated. Visit Elsevier eBooks at eBooks.Healt... |
834 | weight for corrected age, failure to gain adequate weight over time (weight gain velocity), height velocity, weight for length or BMI depend ing on age, and developmental outcomes (see Chapter 62). These growth and anthropometric parameters are measured longitudi nally and plotted on growth charts appropriate for the c... |
835 | across 2 z score lines Deceleration across 1 z score line Inadequate nutrient intake 25 of estimated energyprotein need 2650 of estimated energy protein need 5175 of estimated energy protein need Edema Present Absent Absent Use clinical judgment when applying these diagnostic criteria. It is recommended that when a chi... |
836 | count, a comprehensive metabolic panel (CMP), and urinalysis. Additional measurements that are useful for classifying the severity of malnutrition and following the progress of the acutely malnourished child are mid upper arm circumference (MUAC) and triceps skin folds (TSF). MUAC can be used as an indepen dent anthrop... |
837 | ahmed (dr.mms2020gmail.com) at University of Southern California from ClinicalKey.com by Elsevier on April 20, 2024. For personal use only. No other uses without permission. Copyright 2024. Elsevier Inc. All rights reserved. Chapter 64 u Malnutrition in High Resource Settings 435 months of age). TSF is a measure of sub... |
838 | feeding difficulties and food refusal starting in infancy Low caloric intake secondary to home feeding environment; in extreme cases need to consider child neglect or abuse Avoidant restrictive food intake disorder (ARFID) May need blood tests to check for certain micronutrient deficiencies based on diet history CNS De... |
839 | cows milk protein source. For supplemental nutrition only; none are a complete nutrition supplement. Wound healing supplement Juven Arginaid Arginaid: l Arginine only. Juven: Arginine glutamine, and betahydroxy betamethylbutyrate. TUBE FEEDING Standard, cows milk protein Boost Kid Essentials 1.0, 1.5 Nutren Junior Pedi... |
840 | hypoglycemia in glycogen storage disease or other disorders; dose per weight, age, and glucose levels; suggested starting dose of 0.5 g per kg per feed. Infant rice cereal 15 Thickens formula, not human milk; start with 1 teaspoon rice cerealoz formula (adds 5 kcaloz, dilutes other nutrients). Not recommended to admini... |
841 | of obesity in children was 25.6 among Hispanic children, 24.2 among non Hispanic Black children, 16.1 in non Hispanic White children, and 8.7 in non Hispanic Asian children. Higher mater nal education confers protection against childhood obesity across all ethnic groups. The first 1,000 days, the period from conception... |
842 | factors deter mine levels of available food, preferences for types of foods, levels of PA, and preferences for types of activities. Food preferences play a role in the consumption of energy dense foods. Humans innately prefer sweet and salty foods and tend initially to reject bitter flavors, common to many vegetables. ... |
843 | sleep duration was associated with decreased leptin levels and increased ghrelin levels, along with increased hunger and appetite. Sleep debt also results in decreased glu cose tolerance and insulin sensitivity related to alterations in gluco corticoids and sympathetic activity. Some effects of sleep debt might relate ... |
844 | Inc. All rights reserved. Chapter 65 u Overweight and Obesity 441Table 65.1 Endocrine and Genetic Causes of Obesity DISEASE SYMPTOMS LABORATORY ENDOCRINE Cushing syndrome Central obesity, hirsutism, moon face, hypertension Dexamethasone suppression test GH deficiency Short stature, slow linear growth Evoked GH response... |
845 | with congenital central hypoventilation syndrome (CCHS); presentation 1.5 yr with weight gain, hyperphagia, hypoventilation, cardiac arrest, central diabetes insipidus, hypothyroidism, GH deficiency, pain insensitivity, hypothermia, precocious puberty, and neural crest tumors Unknown genes May be a paraneoplastic disor... |
846 | and on the solitary tract nucleus in the brainstem and in turn activate distinct neuronal networks. Adipocytes secrete adiponectin into the blood, with reduced levels in response to obesity and increased levels in response to fasting. Reduced adiponectin levels are associated with lower insulin sensitivity and adverse ... |
847 | and might link obesity, coronary disease, and subclinical inflammation. Some complications of obesity are mechanical, including obstructive sleep apnea and orthopedic complications. Orthopedic complications include Blount disease and slipped femoral capital epiphysis (see Chap ters 718 and 719.4). Mental health problem... |
848 | example Downloaded for mohamed ahmed (dr.mms2020gmail.com) at University of Southern California from ClinicalKey.com by Elsevier on April 20, 2024. For personal use only. No other uses without permission. Copyright 2024. Elsevier Inc. All rights reserved. Chapter 65 u Overweight and Obesity 443 Fig. 65.2 Regulation of ... |
849 | neurons in arcu ate nucleus and brainstem, respectively. Pale blue boxes indicate nuclei containing proopiomelanocortin (POMC) neurons; tan boxes indicate nuclei containing melanocortin 4 receptor (MC4R) neurons that may serve to integrate adipostatic and satiety signals; and darker blue boxes show some circumventricul... |
850 | 445 Initial assessment of the overweight or obese child includes a com plete review of bodily systems, focusing on the possibility of comorbid conditions (see Table 65.2). Developmental delay and visual and hear ing impairment can be associated with genetic disorders. Difficulty sleeping, snoring, or daytime sleepiness... |
851 | treatment programs are expen sive and not widely available. Therefore interest has grown in novel approaches such as internet based treatments and guided self help. It is important to begin with clear recommendations about appro priate caloric intake for the obese child (Table 65.5). Working with a dietitian is essenti... |
852 | evaluation Hypothalamic obesity Is there developmental delay? Karyotype: DNA methylation studies Measure leptin, insulin, and proinsulin Yes Negative NegativeNegativePositive NegativePositive Positive Reevaluate pituitary function andor hormone therapy PraderWilli syndrome BardetBiedl syndrome Alstrom syndrome TUB defi... |
853 | quality diets, as many highly caloric food products are marketed directly to children during child oriented television programs. Pediatric healthcare providers should assist families to develop goals to change nutritional intake and PA. They can also provide the child and family with needed information. The family shou... |
854 | 1,600 1,600 2,000 9 13 1,800 1,800 2,200 2,000 2,600 14 18 2,200 2,400 2,800 2,800 3,200 Adapted from U.S. Department of Agriculture. Dietary guidelines for Americans, 2005. http:www.health.govDIETARYGUIDELINESdga2005documenthtmlchapter2.htm. Table 65.6 Traffic Light Diet Plan FEATURE GREEN LIGHT FOODS YELLOW LIGHT FOO... |
855 | type 1 disorder. Hormone replacement therapy is available for patients with leptin deficiency and may become avail able for patients with POMC deficiency. In some cases, it is reasonable to refer adolescents for bariatric sur gery evaluation. The American Pediatric Surgical Association guidelines recommend that surgery... |
856 | April 20, 2024. For personal use only. No other uses without permission. Copyright 2024. Elsevier Inc. All rights reserved. Chapter 65 u Overweight and Obesity 449 year of life. Instead, they should expose their infants and young children to a rich variety of fruits, vegetables, grains, lean meats, poultry, and fish to... |
857 | healthy eating, tasting new foods, and eating a well balanced meal. Children should be exposed to a wide range of foods, tastes, and textures. New foods should be offered multiple times. Repeated exposure leads to acceptance and liking. Forcing a child to eat a certain food will decrease the childs preference for that ... |
858 | elevators and moving walkways. Provide information on how to shop and prepare healthier versions of culture specific foods. HEALTHCARE PROVIDERS Explain the biologic and genetic contributions to obesity. Give age appropriate expectations for body weight in children. Work toward classifying obesity as a disease to promo... |
859 | introduced to elevate carotene intake in areas of the world where vitamin A deficiency still is prevalent. carotene and oxygenated carotenoids, such as cryptoxanthin, found in oranges, also possess vitamin A activity, but at a lower bioactivity. In the body, these precursors are used for the synthesis of two essential ... |
860 | without permission. Copyright 2024. Elsevier Inc. All rights reserved. 452 Part V u Nutrition is the major site of chylomicron vitamin A uptake and storage, with potentially high levels of retinyl esters within hepatic stellate cells (HSCs). As vitamin A status deteriorates into the deficient range, vitamin A stores ar... |
861 | (morphogenesis). Many physiologic processes are sensitive to a deficiency or excess of vitamin A or RA, including reproduction, growth, bone development, and the functions of the respiratory, gastrointestinal, hematopoietic, and immune systems. Vitamin A supplementation may be particu larly important in developing coun... |
862 | the 5th percentile of children 4 8 years and 9 13 years of age, respec tively, in the National Health and Examination Survey (NHANES) fell below 1.05 molL, which is interpreted as mild vitamin A deficiency. Retinol levels are even lower in neonates in developing countries, where vitamin A intakes may be low and vitamin... |
863 | and 66.4). The conjunctival membrane undergoes keratinization and may develop foamy appearing plaques (Bitt spots; Fig. 66.5). When lympho cytes infiltrate the cornea in later stages of infection, it degenerates irreversibly (keratomalacia and corneal ulceration), resulting in irreversible blindness. These eye lesions ... |
864 | of the cranial bones at the sutures. There may be vision problems as a consequence of bone overgrowth causing pressure on the optic nerve. Malnutrition, particularly protein deficiency, can cause vitamin A deficiency through impaired synthesis of retinol transport protein. In developing countries, subclinical or clinic... |
865 | 600 1 3 yr 300 600 The UL applies only to preformed vitamin A (retinol). 4 8 yr 400 900 9 13 yr 600 1,700 14 18 yr 900, male; 700, female 2,800 g retinol equivalents per day. Fig. 66.5 Bitt spots with hyperpigmentation seen in a 10moold Indonesian boy. (From Oomen HAPC. Vitamin A deficiency, xerophthal mia and blindnes... |
866 | in adults and children, respectively. Because there is no antidote for hypervitaminosis A, and vitamin A is readily stored in liver and other tissues, it is most important to prevent tox icity. Symptoms may subside rapidly on withdrawal of the vitamin, but the rate of improvement depends on the amount of vitamin A stor... |
867 | of carotenodermia. Visit Elsevier eBooks at eBooks.Health.Elsevier.com for Bibliography. Downloaded for mohamed ahmed (dr.mms2020gmail.com) at University of Southern California from ClinicalKey.com by Elsevier on April 20, 2024. For personal use only. No other uses without permission. Copyright 2024. Elsevier Inc. All ... |
868 | mg day 1 3 yr: 0.5 mgday 4 8 yr: 0.6 mgday 9 13 yr: 1.0 mgday 14 18 yr: Females: 1.2 mg day Males: 1.3 mgday 1 3 yr: 0.4 mgday 4 8 yr: 0.5 mgday 9 13 yr: 0.8 mgday 14 18 yr: Females: 1.0 mgday Males: 1.1 mgday Vitamin B complex includes a number of water soluble nutrients, including thiamine (vitamin B1), riboflavin (B... |
869 | units Megaloblastic anemia Growth stunting, glossitis Neural tube defects in progeny 0.5 1 mgday PO folic acid Malnutrition Malabsorptive states Malignancies Hemolytic anemias Anticonvulsant therapy Enriched cereals, beans, leafy vegetables, citrus fruits, papaya 0 6 mo: 65 gday 7 12 mo: 80 gday 1 3 yr: 150 gday 4 8 yr... |
870 | c vitamin e selenium and carotenoids) 67.1 Thiamine (Vitamin B1) H.P.S. Sachdev and Dheeraj Shah Thiamine diphosphate, the active form of thiamine, serves as a cofac tor for several enzymes involved in carbohydrate catabolism such as pyruvate dehydrogenase, transketolase, and ketoglutarate. These enzymes also play a ro... |
871 | episodes of subacute encephalopathy mani festing as lethargy, dystonia, rigidity, dysphagia, and convulsions and responds to combined treatment with biotin (5 10 mgkgday) and thiamine (up to 40 mgkgday). An infantile form manifesting with acidosis, lethargy, poor feeding, and infantile spasms is also described. Other g... |
872 | delay. 2. Biochemical criteria a. Normal total thiamine blood levels b. Low free thiamine in CSF andor fibroblasts (SLC19A3) c. Low TPP in blood, muscle, andor fibroblasts (TPK1) d. High excretion of alpha ketoglutaric acid in urine (common in TPK1 and SLC25A19, rare in SLC19A3) 3. Radiologic criteria a. MRI pattern co... |
873 | signs, and ataxiais rarely reported in infants and young children with severe deficiency secondary to malignancies or feeding of defective formula. An epidemic of life threatening thiamine deficiency was seen in infants fed a defective soy based formula that had undetectable thiamine levels. Manifes tations included em... |
874 | whole grain cereals. When the staple cereal is polished rice, special efforts need to be made to include legumes andor nuts in the ration. Thiamine and other vitamins can be retained in rice by parboiling, a process of steaming the rice in the husk before mill ing. Improvement in cooking techniques, such as not discard... |
875 | Neurol. 2017;823:317 330, Fig. 3, p. 322.) SLC19A3 SLC25A19 TPK1 Downloaded for mohamed ahmed (dr.mms2020gmail.com) at University of Southern California from ClinicalKey.com by Elsevier on April 20, 2024. For personal use only. No other uses without permission. Copyright 2024. Elsevier Inc. All rights reserved. Chapter... |
876 | of milk products for other reasons. Treatment Treatment includes oral administration of 3 10 mgday of ribofla vin, often as an ingredient of a vitamin Bcomplex mix. The child should also be given a well balanced diet, including milk and milk products. RIBOFLAVIN TOXICITY No adverse effects associated with riboflavin in... |
877 | the surrounding healthy skin, and their distribution can change frequently. The lesions on the hands and feet often have the appearance of a glove or stocking (Fig. 67.4A). Similar demarcations can also occur around the neck (Casal necklace) (see Fig. 67.4B). In some cases, vesicles and bullae develop (wet type). In ot... |
878 | B Complex Deficiencies and Excess 463 Treatment Children usually respond rapidly to treatment. A liberal and varied diet should be supplemented with 50 300 mgday of niacin; in severe cases or in patients with poor intestinal absorption, 100 mg may be given IV. The diet should also be supplemented with other vitamins, e... |
879 | nose, and mouth. Microcytic anemia can occur in infants but is not common. Oxaluria, oxalic acid bladder stones, hyperglycinemia, lymphopenia, decreased antibody formation, and infections also are associated with vitamin B6 deficiency. Several types of vitamin B6 dependence syndromes, presum ably resulting from errors ... |
880 | 10 mg IM or 10 100 mg PO may be necessary. VITAMIN B6 TOXICITY Adverse effects have not been associated with high intakes of vita min B6 from food sources. However, ataxia and sensory neuropathy have been reported with dosages above 200 mgday in adults taking vitamin B6 supplements for several months. Tolerable upper i... |
881 | nucleotide metabolism as acceptors and donors of 1 carbon units. Folate is important for CNS development during embryogenesis. Rice and cereals are rich dietary sources of folate, especially if enriched. Beans, leafy vegetables, and fruits such as oranges and papaya are good sources as well. The vitamin is readily abso... |
882 | olation also are seen. Cerebral folate deficiency is associated with low levels of 5 methyltetrahydrofolate in CSF and normal folate levels in the plasma A B Fig. 67.6 A, Scalp rash in an infant with biotin deficiency before treat ment with biotin. B, After 3 weeks of biotin treatment. (From Ito T, Ni shie W, Fujita Y,... |
883 | of folate normally found in fortified foods. Tolerable upper intake levels for children are 300 gday for 1 3 years, 400 g day for 4 8 years, 600 gday for 9 13 years, and 800 gday for 14 18 years. Excessive intake of folate supplements might obscure and potentially delay the diagnosis of vitamin B12 deficiency. Massive ... |
884 | Enterohepatic circulation, direct absorption, and synthesis by intesti nal bacteria are additional mechanisms helping to maintain the vita min B12 nutriture. VITAMIN B12 DEFICIENCY Deficiency of vitamin B12 caused by inadequate dietary intake occurs primarily in persons consuming strict vegetarian or vegan diets. Preva... |
885 | discussed in Chapter 503.2. Irritability, hypotonia, developmental delay, devel opmental regression, and involuntary movements (predominantly coarse tremors) are the common neurologic symptoms in infants. Older children with vitamin B12 deficiency may show poor growth and poor school performance, whereas sensory defici... |
886 | of intravenous hydroxycobalamin in a child. Acneiform eruptions, palpitations, headache, and insomnia have been occa sionally reported in young adults receiving repeated high parenteral doses. Visit Elsevier eBooks at eBooks.Health.Elsevier.com for Bibliography. Downloaded for mohamed ahmed (dr.mms2020gmail.com) at Uni... |
887 | vitamin C to prevent deficiency throughout infancy. Infants consuming pasteurized or boiled animal milk are at significant risk of developing deficiency if the other sources of vitamin C are also lacking in the diet. Neo nates whose feeding has been delayed because of a clinical condi tion can also have ascorbic acid d... |
888 | diets, particularly those with autism and other developmental disorders, and they should be evaluated for scurvy whenever they present with diffi culty in walking or bone pains. The typical radiographic changes occur at the distal ends of the long bones and are particularly com mon at the knees. The shafts of the long ... |
889 | fat saturation T2 weighted imaging) of the knee demonstrates ill defined T2 hyperintensities in the metaphyses and jux taosseous soft tissue. The diaphysis was spared. (From Seya M, Handa A, Hasegawa D, et al. Scurvy: from a selective diet in children with developmental delay. J Pediatr. 2016;177:331, Fig. A and B, p. ... |
890 | as thalassemia and hemochromatosis. Data are sparse regarding vitamin C toxicity in children. The following values for tolerable upper intake levels are extrapolated from data for adults based on body weight differ ences: ages 1 3 years, 400 mg; 4 8 years, 650 mg; 9 13 years, 1,200 mg; and 14 18 years, 1,800 mg. Visit ... |
891 | occurs from pulling of the softened ribs by the diaphragm during inspi ration. Softening of the ribs also impairs air movement and predisposes patients to atelectasis and pneumonia. Valgus or varus deformities of the legs are common; windswept deformity occurs when one leg is in extreme valgus and the other is in extre... |
892 | activities; K1 (phylloquinone) from diet; K2 (menaquinones) from intestinal bacteria Natural compounds are fat soluble; stable to heat and reducing agents; labile to oxidizing agent, strong acids, alkali, light; bile salts necessary for intestinal absorption Vitamin Kdependent proteins include coagulation factors II, V... |
893 | nutritional defi ciency, the initial evaluation should focus on a dietary history, emphasizing intake of both vitamin D and calcium. Most children in industrialized nations receive vitamin D from formula, fortified milk, or vitamin supplements. Along with the amount, the exact composi tion of the formula or milk is per... |
894 | in Various Disorders Causing Rickets DISORDER Ca Pi PTH 25 (OH)D 1,25 (OH)2D ALP URINE Ca URINE Pi Vitamin D deficiency N, , N, VDDR, type 1A N, N VDDR, type 1B N, N VDDR, type 2A N, N VDDR, type 2B N, N Chronic kidney disease N, N N, Dietary Pi deficiency N N, N XLH N N, N RD ADHR N N N RD HHRH N N, N ARHR, type 1 or ... |
895 | tation). Urinalysis is useful for detecting the glycosuria seen with Fanconi syndrome. Evaluation of urinary excretion of calcium (24 hour collection for calcium or calcium:creatinine ratio) is helpful if hereditary hypophosphatemic rickets with hypercalciuria or Dent disease is suspected. Direct measurement of other f... |
896 | D inhibits its own synthesis in the kidney and increases the synthesis of inactive metabolites. Nutritional Vitamin D Deficiency Vitamin D deficiency remains the most common cause of rickets glob ally and even occurs in industrialized countries. Because vitamin D can be obtained from dietary sources or from cutaneous s... |
897 | (Rickets) and Excess 475 have the same risk factors, decreased maternal vitamin D can also contribute, both by leading to reduced vitamin D content in breast milk and by lessening transplacental delivery of vitamin D. Rickets caused by vitamin D deficiency can also be secondary to dietary practices, such as vegan diets... |
898 | be needed in some patients. Children who have symptomatic hypocalcemia might need intra venous (IV) calcium acutely, followed by oral calcium supplements, which typically can be tapered over 2 6 weeks in children who receive adequate dietary calcium. Transient use of IV or oral 1,25 D (calcitriol) is often helpful in r... |
899 | disease, and Crohn disease. Malabsorption of vitamin D can also occur with intestinal lymphangiectasia and after intestinal resection. Severe liver disease, which usually is also associated with mal absorption, can cause a decrease in 25 D formation as a result of insufficient enzyme activity. Because of the large rese... |
900 | of calcium. The dose of calcitriol is adjusted to maintain a low normal serum calcium level, a normal serum phosphorus level, and a high normal serum PTH level. Targeting a low normal calcium concentration and a high normal PTH level avoids excessive dosing of calcitriol, which can cause hypercalciuria and nephrocalcin... |
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