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Related Concept Videos

Pharmacokinetics in Pediatric Patients: Drug Distribution01:17

Pharmacokinetics in Pediatric Patients: Drug Distribution

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Drug distribution in the pediatric population exhibits unique challenges and considerations due to the physiological differences between children, particularly neonates and infants, and adults. A crucial aspect of pediatric pharmacology is understanding how these differences impact the pharmacokinetics of various drugs, necessitating age-specific dosing strategies to ensure efficacy and safety.Neonates and infants have a higher total body water content, ~75%–90% of their body weight,...
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Pharmacokinetics in Pediatric Patients: Overview and Drug Absorption01:23

Pharmacokinetics in Pediatric Patients: Overview and Drug Absorption

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Understanding the physiological differences in the pediatric population is crucial for effective pharmacotherapy. Neonates, infants, and children exhibit significant variations in gastric pH, gastric emptying time, intestinal transit time, and biliary function. These variations profoundly affect oral drug absorption, necessitating a nuanced approach to pediatric dosing.Neonates present with a unique physiological profile, having a gastric pH greater than 4 and faster and more irregular gastric...
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Pharmacokinetics in Pediatric Patients: Drug Metabolism01:24

Pharmacokinetics in Pediatric Patients: Drug Metabolism

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In pediatric care, understanding the nuances of hepatic drug metabolism is crucial, as it significantly differs from that of adults. This divergence is primarily due to the developmental stage of drug-metabolizing enzymes, which affects how medications are processed in the body. In neonates, for instance, the activity of Phase I enzymes—critical for the initial breakdown of drugs—is markedly reduced, functioning at just 20–40% of the levels seen in adults. This reduction poses...
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Pharmacokinetics in Pediatric Patients: Drug Excretion01:26

Pharmacokinetics in Pediatric Patients: Drug Excretion

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In pediatric medicine, understanding the renal function and drug elimination nuances is crucial for administering safe and effective treatments. Newborns, in particular, display markedly slower renal functions than adults, profoundly affecting how drugs are cleared from their bodies. This slower drug clearance requires clinicians to extend the dosing intervals for many medications to prevent drug accumulation and toxicity while ensuring therapeutic efficacy.One key area where these adjustments...
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Spongy Bone01:09

Spongy Bone

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All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...
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Compact Bone01:27

Compact Bone

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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
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Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry
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Pediatric DXA bone measurements.

Monique M Sanchez1, Vicente Gilsanz

  • 1Department of Radiology, Childrens Hospital Los Angeles, Los Angeles, CA 90027, USA.

Pediatric Endocrinology Reviews : PER
|February 4, 2006
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Summary
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Dual-energy x-ray absorptiometry (DXA) is a key tool for assessing bone density in children, aiding in early osteoporosis risk identification. Understanding DXA in pediatrics helps in early intervention strategies for lifelong bone health.

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Area of Science:

  • Pediatric Endocrinology
  • Radiology
  • Bone Densitometry

Background:

  • Dual-energy x-ray absorptiometry (DXA) is the global standard for bone mineral content assessment in all age groups.
  • Interpreting DXA in children presents unique challenges due to dynamic bone development.
  • Pediatric DXA is crucial for identifying individuals at risk for adult osteoporosis.

Purpose of the Study:

  • To provide an overview of Dual-energy x-ray absorptiometry (DXA) technology in pediatric populations.
  • To discuss the complexities of DXA interpretation in children.
  • To highlight the role of DXA in early identification and intervention for osteoporosis risk.

Main Methods:

  • Overview of the principles of Dual-energy x-ray absorptiometry (DXA) operation.
  • Discussion of calibration methods and their importance for accurate pediatric bone density measurements.
  • Review of efficacy, safety, and interpretation guidelines for pediatric DXA scans.

Main Results:

  • DXA is a widely adopted, safe, and effective method for measuring bone mineral content.
  • Pediatric bone dimensions are dynamic, requiring specialized interpretation of DXA data.
  • DXA data, combined with genetic insights, can identify children at high risk for future osteoporosis.

Conclusions:

  • DXA is an invaluable tool for assessing pediatric bone health and predicting future osteoporosis risk.
  • Early identification of at-risk children through DXA enables timely and targeted interventions.
  • Further research into the genetics of osteoporosis will enhance the utility of pediatric DXA.