MétaCan
Menu
Back to cohort
Record W2344448645 · doi:10.4212/cjhp.v69i2.1538

Evaluation of Heparin Anticoagulation Protocols in Post–Renal Transplant Recipients (EHAP-PoRT Study)

2016· article· en· W2344448645 on OpenAlexaffvenueabout
Joan C. Y. Ng, Marianna Leung, David Landsberg

Bibliographic record

VenueThe Canadian Journal of Hospital Pharmacy · 2016
Typearticle
Languageen
FieldMedicine
TopicHeparin-Induced Thrombocytopenia and Thrombosis
Canadian institutionsUniversity of British ColumbiaProvidence Health Care
Fundersnot available
KeywordsRenal transplantHeparinPort (circuit theory)MedicineIntensive care medicineInternal medicineTransplantationEngineering

Abstract

fetched live from OpenAlex

ABSTRACT Background: Disturbances in hemostasis are common among renal transplant recipients. Because of the risk of thromboembolism and graft loss after transplant, a prophylactic heparin protocol was implemented at St Paul’s Hospital in Vancouver, British Columbia, in 2011. Therapeutic heparin is sometimes prescribed perioperatively for patients with preexisting prothrombotic conditions. There is currently limited literature on the safety and efficacy of heparin use in the early postoperative period. Objectives: The primary objectives were to document, for patients who underwent renal transplant, the incidence of major bleeding and of thrombosis in those receiving therapeutic heparin, prophylactic heparin, and no heparin anticoagulation in the early postoperative period and to compare these rates for the latter 2 groups. The secondary objectives included a comparison of the risk factors associated with major bleeding and thrombosis. Methods: Adult patients who received a renal transplant at St Paul’s Hospital between January 2008 and July 2013 were included in this retrospective cohort study. Electronic health records and databases were used to divide patients into the 3 heparin-use cohorts, to identify cases of major bleeding and thrombosis, and to characterize patients and events. The Fisher exact test was used for the primary outcome analysis, and descriptive statistics were used for all other outcomes. Results: A total of 547 patients were included in the analysis. Major bleeding was observed in 6 (46%) of the 13 patients who received therapeutic heparin; no cases of thrombosis occurred in these patients. Major bleeding occurred in 8 (3.0%) of the 266 patients who received prophylactic heparin and 9 (3.4%) of the 268 who received no heparin (p > 0.99). Thrombosis occurred in 1 (0.4%) and 3 (1.1%) of these patients, respectively (p = 0.62). Major bleeding occurred more frequently among patients with a low-target heparin protocol, but 61% of values for partial thromboplastin time were above target. A larger proportion of deceaseddonor transplant recipients who had major bleeding were taking antiplatelet agents, relative to living-donor transplant recipients. Conclusion: Therapeutic use of heparin increased the risk of bleeding among renal transplant recipients, but there were no cases of thrombosis. Prophylactic use of heparin did not increase the risk of bleeding and prevented proportionately more cases of thrombosis relative to no anticoagulation; this result supports the continued use of prophylaxis. RÉSUMÉ Contexte : Les troubles de l’hémostase sont courants chez les patients ayant subi une transplantation rénale. Comme il existe des risques de thromboembolie et de perte du greffon après une greffe, un protocole d’administration d’héparine prophylactique a été mis en place en 2011 à l’hôpital Saint-Paul de Vancouver, en Colombie-Britannique. On prescript parfois l’héparine thérapeutique en période périopératoire à certains patients affligés d’un état prothrombotique préexistant. Il n’y a actuellement que peu de documentation sur la sécurité et l’efficacité de l’utilisation d’héparine au début de la période postopératoire. Objectifs : Les objectifs principaux étaient de documenter les incidences de cas d’hémorragie importante et de thrombose chez les patients ayant subi une transplantation rénale et ayant reçu des doses thérapeutiques d’héparine, des doses prophylactiques d’héparine ou aucun anticoagulant au début de la période postopératoire ainsi que de comparer les incidences des cas entre les deux derniers groupes. Les objectifs secondaires incluaient la comparaison des facteurs de risque associés à une hémorragie importante et à une thrombose. Méthodes : Les patients adultes retenus dans la présente étude de cohort rétrospective avaient subi une greffe rénale à l’hôpital Saint-Paul entre janvier 2008 et juillet 2013. Des dossiers de santé informatisés et des bases de données ont servi à séparer les patients en trois cohortes selon l’utilisation ou non et la dose d’héparine afin de déceler les cas d’hémorragie importante et de thrombose et afin d’offrir un portrait des patients et des événements. Le test exact de Fisher a été employé pour l’analyse des principaux paramètres alors que l’on a utilisé des statistiques descriptives pour tous les autres paramètres. Résultats : Au total, 547 patients ont été retenus pour l’analyse. Des hémorragies importantes ont été observées chez 6 (46 %) des 13 patients ayant reçu de l’héparine thérapeutique. Aucune thrombose n’a été relevée chez ces patients. Des hémorragies importantes ont été observées chez 8 (3,0 %) des 266 patients ayant reçu de l’héparine prophylactique et chez 9 (3,4 %) des 268 patients n’ayant pas reçu d’héparine (p > 0,99). Des thromboses ont été observées respectivement chez 1 (0,4 %) et 3 (1,1 %) de ces patients (p = 0,62). Un plus grand nombre de patients ont souffert d’hémorragies importantes avec un protocole à valeurs cibles inférieures pour l’administration d’héparine, mais 61 % des valeurs pour le temps de thromboplastine partielle étaient au-dessus de la cible. Parmi les patients qui ont souffert d’hémorragies importantes et dont le donneur était décédé, une plus grande proportion prenaient des antiplaquettaires. Conclusion : L’administration thérapeutique d’héparine a accru les risques d’hémorragie chez les greffés rénaux, mais il n’y a pas eu de cas de thrombose. L’administration prophylactique d’héparine n’a pas augmenté les risques d’hémorragie et elle a permis d’éviter proportionnellement plus de cas de thrombose que l’absence d’anticoagulant; ce résultat vient appuyer l’utilisation d’héparine prophylactique.

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)0.004
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 score0.003
Threshold uncertainty score0.015

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0030.004
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.001
Bibliometrics0.0010.001
Science and technology studies0.0000.000
Scholarly communication0.0010.001
Open science0.0010.001
Research integrity0.0000.001
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 head0.095
GPT teacher head0.380
Teacher spread0.286 · 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".

Quick stats

Citations11
Published2016
Admission routes3
Has abstractyes

Explore more

Same venueThe Canadian Journal of Hospital PharmacySame topicHeparin-Induced Thrombocytopenia and ThrombosisFrench-language works237,207