KLI

Interpretation of volume kinetics in terms of pharmacokinetic principles

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Abstract
Volume kinetics is the pharmacokinetics of infusion fluids and describes the distribution and elimination of infused volume. Generally, pharmacokinetic parameters can be estimated by measuring the concentration of a drug. However, it is almost impossible to directly measure the concentration of fluids. Therefore, in volume kinetics, the disposition of fluids is indirectly quantified by measuring the hemoglobin concentration under the premise of no hemoglobin loss. If the hemoglobin concentration is repeatedly measured while administering the fluids, the dilution (relative change of the plasma volume) for each corresponding hemoglobin concentration can be obtained. The dilution is based on the concept of plasma volume expansion. The method of quantifying the drugs disposition with compartmental analysis has been equally applied to volume kinetics. The transfer of fluids between compartments is explained by first-order kinetics, and it is assumed that fluid is only removed from the central compartment. Population analysis can be used to identify covariates that can account for inter-individual variability in volume kinetic parameters. Body weight and mean blood pressure are well-known representative covariates of kinetic volume parameters. Using volume kinetic parameters, the volume expansion effects of crystalloid and colloid solutions can be understood more effectively, thereby facilitating appropriate fluid therapy. Although limitations exist in volume kinetics, its implications are important for clinicians when administering fluids.
Author(s)
최병문
Issued Date
2021
Type
Article
Keyword
Body fluidsColloidsCrystalloid solutionsHemoglobinsPharmacokineticsStatistical models
DOI
10.4097/kja.21085
URI
https://oak.ulsan.ac.kr/handle/2021.oak/7286
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_nrf_kci_oai_kci_go_kr_ARTI_9793526&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Interpretation%20of%20volume%20kinetics%20in%20terms%20of%20pharmacokinetic%20principles&offset=0&pcAvailability=true
Publisher
KOREAN JOURNAL OF ANESTHESIOLOGY
Location
대한민국
Language
영어
ISSN
2005-6419
Citation Volume
74
Citation Number
3
Citation Start Page
204
Citation End Page
217
Appears in Collections:
Medicine > Medicine
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