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Record W2543128384 · doi:10.4212/cjhp.v69i5.1588

Predicting Maintenance Doses of Vancomycin for Hospitalized Patients Undergoing Hemodialysis

2016· article· en· W2543128384 on OpenAlexaffvenue
Wasim S. El Nekidy, Maher M. El‐Masri, Greg S. Umstead, Michelle Dehoorne-Smith

Bibliographic record

VenueThe Canadian Journal of Hospital Pharmacy · 2016
Typearticle
Languageen
FieldMedicine
TopicAntimicrobial Resistance in Staphylococcus
Canadian institutionsUniversity of Windsor
Fundersnot available
KeywordsHemodialysisMedicineVancomycinDosingConfidence intervalInternal medicineObservational studyProspective cohort studySurgeryIntensive care medicineStaphylococcus aureus

Abstract

fetched live from OpenAlex

ABSTRACT Background: Methicillin-resistant Staphylococcus aureus is a leading cause of death in patients undergoing hemodialysis. However, controversy exists about the optimal dose of vancomycin that will yield the recommended pre-hemodialysis serum concentration of 15–20 mg/L. Objective: To develop a data-driven model to optimize the accuracy of maintenance dosing of vancomycin for patients undergoing hemodialysis. Methods: A prospective observational cohort study was performed with 164 observations obtained from a convenience sample of 63 patients undergoing hemodialysis. All vancomycin doses were given on the floor after completion of a hemodialysis session. Multivariate linear generalized estimating equation analysis was used to examine independent predictors of pre-hemodialysis serum vancomycin concentration. Results: Pre-hemodialysis serum vancomycin concentration was independently associated with maintenance dose (B = 0.658, p < 0.001), baseline pre-hemodialysis serum concentration of the drug (B = 0.492, p < 0.001), and interdialytic interval (B = –2.133, p < 0.001). According to the best of 4 models that were developed, the maintenance dose of vancomycin required to achieve a pre-hemodialysis serum concentration of 15–20 mg/L, if the baseline serum concentration of the drug was also 15–20 mg/L, was 5.9 mg/kg with interdialytic interval of 48 h and 7.1 mg/kg with interdialytic interval of 72 h. However, if the baseline pre-hemodialysis serum concentration was 10–14.99 mg/L, the required dose increased to 9.2 mg/kg with an interdialytic interval of 48 h and 10.0 mg/kg with an interdialytic interval of 72 h. Conclusions: The maintenance dose of vancomycin varied according to baseline pre-hemodialysis serum concentration of the drug and interdialytic interval. The current practice of targeting a pre-hemodialysis concentration of 15–20 mg/L may be difficult to achieve for the majority of patients undergoing hemodialysis. RÉSUMÉ Contexte : Les infections à Staphylococcus aureus résistant à la méthicilline comptent parmi les principales causes de mortalité chez les patients traités par hémodialyse. Or, les avis sont partagés quant à la dose optimale de vancomycine qui permet d’atteindre la concentration sérique recommandée de 15–20 mg/L préalablement à l’hémodialyse. Objectif : Mettre au point un modèle guidé par des données afin d’optimiser l’exactitude de la dose d’entretien de vancomycine chez les patients qui subissent une hémodialyse. Méthodes : Une étude de cohorte prospective observationnelle a été menée à partir de 164 observations obtenues d’un échantillon de commodité de 63 patients traités par hémodialyse. Toutes les doses de vancomycine ont été données à l’unité de soins courants après la fin d’une séance d’hémodialyse. Une analyse de régression linéaire multiple par équation d’estimation généralisée a été effectuée pour cerner les variables indépendantes qui permettent de prévoir la concentration sérique de vancomycine préalablement à l’hémodialyse. Résultats : La concentration sérique de vancomycine avant hémodialyse a été associée de façon indépendante à l’intervalle entre deux dialyses (B = –2,133, p < 0,001), à la dose d’entretien (B = 0,658, p < 0,001) et à la concentration sérique initiale du médicament préalablement à l’hémodialyse (B = 0,492, p < 0,001). Selon les quatre meilleurs modèles élaborés, la dose d’entretien de vancomycine nécessaire pour atteindre une concentration sérique de 15–20 mg/L avant hémodialyse, si la valeur initiale était aussi de 15–20 mg/L, était de 5,9 mg/kg pour un intervalle de 48 h entre deux dialyses et de 7,1 mg/kg pour un intervalle de 72 h entre deux dialyses. Or, si la concentration sérique initiale préalablement à l’hémodialyse se situait entre 10 et 14,99 mg/L, la dose necessaire augmentait à 9,2 mg/kg pour un intervalle de 48 h entre deux dialyses et à 10,0 mg/kg pour un intervalle de 72 h écoulé entre deux dialyses. Conclusions : La dose d’entretien de vancomycine variait en fonction de la concentration sérique initiale du médicament préalablement à l’hémodialyse et en fonction de l’intervalle entre deux dialyses. La pratique actuelle voulant qu’on vise une concentration préalable à l’hémodialyse de 15–20 mg/L peut être difficile à respecter chez la majorité des patients subissant une hémodialyse.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.008
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.012
Threshold uncertainty score0.023

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0010.008
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.001
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0010.000
Open science0.0010.000
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0010.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.014
GPT teacher head0.269
Teacher spread0.255 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

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Citations13
Published2016
Admission routes2
Has abstractyes

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