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Record W4387520325 · doi:10.4212/cjhp.3447

Comparison of Tetrasodium EDTA 4% with Sodium Citrate 4% as Line-Locking Solutions at 2 Tertiary Hemodialysis Centres

2023· article· en· W4387520325 on OpenAlexaffvenue
Brittany Gage, Karen Shalansky, Wynnie Lau, Claire Harris, Mercedeh Kiaii

Bibliographic record

VenueThe Canadian Journal of Hospital Pharmacy · 2023
Typearticle
Languageen
FieldHealth Professions
TopicCentral Venous Catheters and Hemodialysis
Canadian institutionsSt. Paul's HospitalVancouver General HospitalUniversity of British ColumbiaBurnaby Hospital
Fundersnot available
KeywordsEthylenediaminetetraacetic acidMedicineSodium citrateHemodialysisAnesthesiaSurgeryUrologyChemistryChelation

Abstract

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Background: The patency of central venous catheters (CVCs) in patients undergoing hemodialysis (HD) is maintained by instilling sodium citrate 4% (SC 4%) locking solution. Alteplase, a thrombolytic agent, is administered to restore function if patency is lost. Objective: To compare SC 4% with a new line-locking solution, ethylenediaminetetraacetic acid 4% (EDTA 4%), in terms of CVC patency and alteplase use. Methods: This retrospective chart review included all HD patients who were switched from SC 4% to EDTA 4% locking solution at 2 tertiary HD centres between June and December 2021. Patients were switched to EDTA 4% if they had high usage of alteplase (receiving ≥ 2 doses of alteplase in a 2-week period). For each line-locking agent, HD pump speeds and alteplase use were analyzed over 2 consecutive 12-week periods. Mean serum calcium and ionized calcium values were recorded during each period. A cost analysis was also performed. Results: A total of 37 HD patients were switched to EDTA 4% during the study period. There was no difference in mean HD pump speed between SC 4% and EDTA 4% (307.7 vs 305.1 mL/min, p = 0.48). The number of catheter-use-days on which alteplase was required declined significantly, from 313 days with SC 4% to 94 days with EDTA 4% (p < 0.001), with an overall cost reduction of 34% ($13 183.21). The decrease in alteplase usage was primarily driven by 1 of the 2 sites. A statistically significant decrease in mean ionized calcium at site 2 (from 1.12 to 1.1 mmol/L, p = 0.037) was noted. As well, an intraluminal interaction between EDTA 4% and serum calcium caused 6 cases of low serum calcium. Conclusions: This study showed that use of EDTA 4% as a line-locking agent reduced alteplase usage in the CVCs of HD patients while maintaining adequate pump speed (i.e., ≥ 300 mL/min). RÉSUMÉ Contexte : La perméabilité des cathéters veineux centraux (CVC) chez les patients hémodialysés (HD) est maintenue en instillant une solution de verrouillage de citrate de sodium à 4 % (CS 4 %). L’alteplase, un agent thrombolytique, est administré pour rétablir la fonction en cas de perte de perméabilité. Objectif : Comparer la solution de CS 4 % et une nouvelle solution de verrouillage, l’acide éthylènediaminetétraacétique 4 % (EDTA 4 %), en termes de perméabilité du CVC et d’utilisation de l’alteplase. Méthodes : Cet examen rétrospectif des dossiers a été réalisé pour tous les patients HD qui sont passés de la solution de verrouillage de CS 4 % à la solution d’EDTA 4 % dans 2 centres d’hémodialyse tertiaires au cours de la période de juin à décembre 2021. Les patients sont passés à l’EDTA 4 % en cas d’utilisation élevée de l’alteplase (≥ 2 doses d’alteplase reçues sur une période de 2 semaines). Pour chaque agent de verrouillage, les vitesses de la pompe d’hémodialyse et l’utilisation de l’alteplase ont été analysées sur 2 périodes consécutives de 12 semaines. Les valeurs moyennes de calcium sérique et de calcium ionisé ont été enregistrées au cours de chaque période. Une analyse des coûts a également été réalisée. Résultats : Au total, 37 patients HD sont passés à l’EDTA 4 % au cours de la période de l’étude. Aucune différence dans la vitesse moyenne de la pompe d’hémodialyse n’a été constatée en cas d’utilisation de la solution de CS 4 % ou d’EDTA 4 % (307,7 c. 305,1 mL/min, p = 0,48). Le nombre de jours d’utilisation du cathéter qui ont nécessité l’utilisation de l’alteplase a diminué de manière significative, passant de 313 jours avec la solution de CS 4 % à 94 jours avec l’EDTA 4 % (p < 0,001); la réduction globale des coûts se montait à 34 % (économies de 13 183,21 $). L’utilisation moins importante de l’alteplase était principalement due à 1 des 2 sites. Une diminution significative du calcium ionisé moyen (1,12 c. 1,1 mmol/L, p = 0,037) a été observée au deuxième site. De plus, une interaction intraluminale entre l’EDTA 4 % et le calcium sérique a provoqué 6 cas d’hypocalcémie. Conclusions : Cette étude a montré que l’utilisation de l’EDTA 4 % comme agent de verrouillage réduisait l’utilisation de l’alteplase dans les CVC des patients HD tout en maintenant une vitesse de pompe adéquate (c’est-à-dire ≥ 300 mL/min).

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)0.003
metaresearch head score (Gemma)0.011
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 score0.994
Threshold uncertainty score0.019

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0030.011
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0010.001
Bibliometrics0.0010.002
Science and technology studies0.0000.000
Scholarly communication0.0010.001
Open science0.0010.001
Research integrity0.0010.000
Insufficient payload (model declined to judge)0.0020.000

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 head0.063
GPT teacher head0.375
Teacher spread0.312 · 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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Citations1
Published2023
Admission routes2
Has abstractyes

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