Publications by authors named "Melanie Closset"

Introduction: Cancer chemotherapy doses are often adapted to patients' body surface area and produced individually. Alternatively, dose-banding promotes batch production of clinically defined fixed doses, for which a standard deviation of±5% determines a band incorporating individual doses calculated on the basis of body surface area. The aim is to compare the costs of individualized and batch production of gemcitabine in a centralized chemotherapy reconstitution unit.

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Objectives: This study aimed to investigate the physicochemical stability of morphine hydrochloride and droperidol mixture stored in polypropylene syringes to prepare them in advance by a centralised intravenous additive service (CIVAS).

Methods: Five polypropylene syringes containing 2 mg/mL morphine hydrochloride and 0.083 mg/mL droperidol were stored in a light-protected environment at room temperature.

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In this review, we aim to highlight the extent of inappropriate hemostasis testing and provide practical guidance on how to prevent it. We will focus on the acute setting, including but not limited to the emergency department and intensive care unit. To this end, we will first discuss the significance of inappropriateness, in the general context of laboratory medicine.

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Background: Closed system transfer devices (CSTD) help to reduce the exposure of healthcare professionals to hazardous drugs. They may be used in stability studies conducted on anticancer drugs. During a stability study about polyolefin bags of gemcitabine, Tevadaptor® device was suspected of causing a bias in the evaluation of the concentrations of the first aliquots extracted from the bags.

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Article Synopsis
  • The scoping review aims to compile and analyze published guidelines for laboratory tests used in ICU patients, addressing both the increasing reliance on clinical labs and instances of inappropriate testing that can harm patients and inflate costs.
  • The background highlights the need for effective management strategies, including guidelines to ensure the right tests are conducted for the right patients at appropriate times, given that no comprehensive summary currently exists.
  • The review will include documents providing clear testing recommendations for 34 commonly ordered tests, using a detailed search strategy across several databases, while following established methodologies and considering documents published in English.
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Background: The use of laboratory resources has seen a substantial increase in recent years, driven by automation and emerging technologies. However, inappropriate use of laboratory testing, encompassing both overuse and underuse, poses significant challenges.

Content: This review explores the complex interplay between patient safety, economic, and environmental factors-known as the "triple bottom line" or "3Ps" for people, profit, and planet-associated with inappropriate use of laboratory resources.

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Introduction: Some studies suggest that the monovalent mRNA-1273 vaccine is more effective than BNT162b2 in producing higher levels of antibodies. However, limited data are available, and the methods used are not directly comparable.

Material And Methods: Blood samples were obtained before the booster (third dose) and after 14, 90, and 180 days in two similar cohorts who received the original BNT162b2 or mRNA-1273 vaccine designed to target wild type SARS-CoV-2.

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Objective: Esketamine (Vesierra) is a molecule, used alone or in combination, to induce and maintain general anaesthesia and to relieve pain in emergency medicine. The aim of this study is to evaluate the long-term physicochemical stability of a 1 mg/mL solution of esketamine diluted in 0.9% sodium chloride (NaCl) and stored in polypropylene syringes at 5±3°C during 65 days (64+1 day at 22±3°C) and 72 hours at 22±3°C (room temperature), in order to centralise preparation under aseptic conditions in hospital pharmacy.

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Healthcare expenses are increasing, as is the utilization of laboratory resources. Despite this, between 20% and 40% of requested tests are deemed inappropriate. Improper use of laboratory resources leads to unwanted consequences such as hospital-acquired anemia, infections, increased costs, staff workload and patient stress and discomfort.

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Studies about the duration of the humoral and cellular response following the bivalent booster administration are still scarce. We aimed at assessing the humoral and cellular response in a cohort of healthcare workers that received this booster. Blood samples were collected before the administration of the bivalent booster from Pfizer-BioNTech and after 14, 28, 90, and 180 days.

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Background: Right ventricular (RV) dysfunction remains a major problem after heart transplantation and may be associated with brain death (BD) in a donor. A calcineurin inhibitor tacrolimus was recently found to have beneficial effects on heart function. Here, we examined whether tacrolimus might prevent BD-induced RV dysfunction and the associated pathobiological changes.

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Article Synopsis
  • The study aimed to evaluate the long-term humoral immunity from a booster shot of the BNT162b2 vaccine and how well binding antibody tests predict neutralizing antibodies (NAbs) against the Omicron variant of SARS-CoV-2.
  • Researchers analyzed 269 serum samples from healthcare workers at various timepoints up to 6 months post-booster, observing significant declines in NAbs and anti-RBD IgG levels, with specific correlations noted between the assays used.
  • The findings indicated that while humoral immunity significantly decreases after 6 months, the anti-RBD IgG and Omicron sVNT assays are still reliable predictors of neutralizing activity against the virus.
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Objectives: The BNT162b2 messenger RNA vaccine is highly effective in reducing COVID-19 infection, hospitalization and death. However, many subjects developed a breakthrough infection despite a full vaccination scheme. Since the waned efficacy of mRNA vaccines is correlated with the decrease of antibodies occurring over time, we aimed at evaluating whether lower levels of antibodies were associated with an increased risk of breakthrough infection in a cohort of breakthrough subjects that received three vaccine doses.

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Gemcitabine is an analogue of cytidine arabinoside, used alone or in combination chemotherapy to treat various type of cancer. The dose-banding of gemcitabine provides the opportunity to anticipate the preparation of this anticancer drug on condition of carrying out stability studies. The aim of this study is to develop and validate a stability-indicating ultra-high-performance Liquid Chromatography (UHPLC) method for measuring the concentration of gemcitabine and to evaluate its stability at standardised rounded doses in polyolefin bags.

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Background: Chemotherapy doses are usually prescribed on the basis of body surface area but dose banding is emerging as an efficient alternative. Dose banding presents the possibility of in-advance preparation in a Centralized Intravenous Admixture Service.

Aim Of The Study: To evaluate the long-term stability of 5-fluorouracil at banded doses (700 mg and 800 mg) in polyolefin bags.

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Evidence about the long-term persistence of the booster-mediated immunity against Omicron is mandatory for pandemic management and deployment of vaccination strategies. A total of 155 healthcare professionals (104 COVID-19 naive and 51 with a history of SARS-CoV-2 infection) received a homologous BNT162b2 booster. Binding antibodies against the spike protein and neutralizing antibodies against Omicron were measured at several time points before and up to 6 months after the booster.

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(1) Background: High immunosuppressive regimen in lung transplant recipients (LTRs) hampers the immune response to vaccination. We prospectively investigated the immunogenicity of heterologous ChAdOx1 nCoV-19-BNT162b2 mRNA vaccination in an LTR cohort. (2) Methods: Forty-nine COVID-19 naïve LTRs received a two-dose regimen ChAdOx1 nCoV-19 vaccine.

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Death rattle, which could often be associated with a pulmonary fluid overload, occurs in 25% to 90% of dying patients. The co-administration of scopolamine (anticholinergic drug) and bumetanide (loop diuretic) could be considered in order to avoid unnecessary fluid overload at end-stage of life. The objective of this study was to investigate the physical and chemical stabilities of the admixture bumetanide and scopolamine in order to prepare them in advance by a centralized intravenous additive service in-hospital pharmacy.

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The objective of this review was to collect information and results about the method of the microwave freeze-thaw treatment of injectable drugs and whether the method can support the development of Centralized Intravenous Admixtures Services. A systematic review of the scientific literature about injectable drug stability studies was performed. The data are presented in a table, which describes the name of the drug, producer, final concentration, temperature and time of freezing storage, type of microwave oven, thawing power, method of dosage, and the results after treatment or final long-term storage at 5°C ± 3°C.

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Objectives: Clonidine is an alpha-2 adrenoreceptor agonist and is frequently combined with opioids (ie, morphine hydrochloride (HCl)) for the management of chronic pain. In palliative care, the administration of clonidine and morphine HCl is recommended in case of tolerance effect. This study aimed to evaluate the physical and chemical stability of this admixture at high and low concentrations in 14 and 48 mL polypropylene syringes.

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Data about the long-term duration of antibodies after SARS-CoV-2 vaccination are still scarce and are important to design vaccination strategies. In this study, 231 healthcare professionals received the two-dose regimen of BNT162b2. Of these, 158 were seronegative and 73 were seropositive at baseline.

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Several studies reported on the humoral response in subjects having received the BNT162b2 mRNA COVID-19 vaccine. However, data on the kinetics of antibodies 3 months post-vaccination are currently lacking and are important to drive the future vaccination strategy. The CRO-VAX HCP study is an ongoing multicentre, prospective and interventional study designed to assess the antibody response in a population of healthcare professionals who had received two doses of the BNT162b2 mRNA COVID-19 vaccine.

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