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Implementation of a Ph. Eur. compliant recombinant method for testing of bacterial endotoxins in sterile pharmaceuticals

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European Statement

Production and Compounding

Author(s)

Randi Hamre Svendsen, Vilde Pettersen, Theo Dogbeten

Why was it done?

Endotoxin testing by the gel-clot method is a limit test and relies on the operator’s subjective evaluation of the results. The procedure itself contains several steps and dilutions, and it is time and resource consuming. The availability of the amoebocyte lysate reagent can also vary since it is harvested from the endangered horseshoe crab. The recombinant factor C method (rFC) is a fluorimetric method based on the gene sequence of the horseshoe crab, providing quantitative results with no interpretation by an operator. The rFC method consists of less handling and is less susceptible to human error.

What was done?

The hospital pharmacy implemented a modern system for testing of bacterial endotoxins as a part of the quality control of raw materials (i.e. water for injection (WFI)) and sterile pharmaceuticals manufactured at the pharmacy, replacing the old gel-clot test.

How was it done?

All sterile pharmaceuticals manufactured at the hospital pharmacy were evaluated for maximum valid dilution (MVD) and endotoxin limit. Firstly, the optimal dilution of the products was established, and then tested with three different batches to ensure valid results regardless of any batch-to-batch variation. WFI was validated undiluted with batches from three separate days. Validation started with the most frequently manufactured products, and subsequently continued over the next year with the rest. To expedite the full validation of some products, expired batches were used simultaneously with at least one recently produced batch due to infrequent production times, otherwise a full transfer of method would not be achieved for up to six years.

What has been achieved?

In total, 25 sterile pharmaceuticals and raw materials were successfully validated for endotoxin testing by rFC during 2021 and 2022. The gel-clot method is no longer in use at the hospital pharmacy, reducing the negative impact on the horseshoe crab population. The rFC method streamlined the testing for endotoxins, reducing the time spent on performing the analysis by 50% with less handling and increased capacity. Results are quantitative and objective, not relying on observations by the operator, thereby improving the quality.

What next?

The rFC method increases both quality and capacity of testing, opening up for expanded testing in pharmacy, and of samples from other departments or hospitals.

Added value of centralised compounding of vaccines against SARS-CoV-2 in Hospital Pharmaceutical Services – a quantitative analysis

European Statement

Production and Compounding

Author(s)

Rui Relvas, Rui Pedro Marques, Ana Castro, Sérgio Nobre, João Paulo Lopes da Cruz

Why was it done?

Medicines compounding by the HPS-staff is a primordial activity, and its centralisation allows several benefits in levels such as patient safety, quality, efficiency, and pharmacoeconomics. Despite this recognised importance, it is not always possible to quantify its added value. The fact that vaccines against SARS-CoV-2 are supplied in multi-dose vials and the need to prepare and assure enough doses to vaccinate a broad population presented itself as an excellent opportunity to analyse such indicators.

What was done?

A quantitative analysis of the importance and added value of centralised preparation and compounding of vaccines against SARS-CoV-2 at the Hospital Pharmaceutical Services’ (HPS) Compounding Unit from a Central Hospital in Portugal.

How was it done?

Between 27th December 2020 and 2nd August 2021, 13.030 doses were prepared (96.9% Pfizer/BioNTech; 3.1% AstraZeneca). At the first 3 vaccination sessions, multi-dose vials were diluted at the HPS, and each syringe measured by the nursing-staff previously to the administration.
After these initial sessions, each dose started to be individualised by the HPS-staff on pre-filled, ready-to-use syringes. Each vaccine dose was individualised on a horizontal laminar flow cabinet according to a previously approved operational procedure.
Reception, preparation, and dispensation records were retrospectively analysed. Key performance indicators were quantified.

What has been achieved?

During the first 3 sessions of vaccination, when nursing-staff measured each vaccine volume, a total of 1640 doses were administered. However, it would be possible to measure a total of 1932 doses (84,9%). The daily maximum of people vaccinated was 770.
In the following sessions was possible to prepare 11.390 doses, with a theoretical maximum of 10.892 (104,6%) and a daily maximum of 1.113.
This yield, over 100%, allowed an excess of 498 doses, which translated into the vaccination of 249 extra individuals fully vaccinated with the 2 doses. Factors like needle and syringe selection and preparation beyond an aseptic and validated environment contributed for the yield increase.

What next?

Series-production of compounded medicines in a sterile, validated, and controlled environment allows important benefits and this analysis shows the potentiation of every key performance indicator considered. These data should be considered for the future planning of population-wide activities involving the massive preparation of sterile medicines.

COVID-19 VACCINATION PLAN BY THE PHARMACY DEPARTMENT IN A SPANISH HOSPITAL

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European Statement

Selection, Procurement and Distribution

Author(s)

BERTA MONTERO-PASTOR, ELSA IZQUIERDO-GARCÍA, LORENA DE AGUSTÍN SIERRA, ISMAEL ESCOBAR RODRIGUEZ

Why was it done?

The unprecedented mass COVID-19 vaccination has highlighted the need to develop strategies that prioritize and optimize the use of resources. Strategies have been established at the national and community levels, however, each center must implement its own plan according to needs and capabilities for its target population.

What was done?

A Pharmacy Department (PD) vaccination plan including strategies to optimize human and material resources available to deal with mass COVID-19 vaccination.

How was it done?

In plan development, we considered the type of vaccines, storage requirements, the need for specific equipment and workflows, limited vaccine vial supply, and aspects related to staff in the PD.
A standard operating procedure (SOP) was developed for logistic management of vaccine orders, including an SOP for nursing staff if the shipment arrived outside the PD schedule.
For storage, specific space was provided considering the different storage requirements.
The doses corresponding to the vaccination of health professionals and patients from group 7 of the national vaccination strategy (onco-hematologic patients with active treatment, hemodialysis patients, primary immunodeficiencies, HIV -CD4<200cel/ml, Down Syndrome ≥40 years) were prepared centrally in the PD. For the general population, a centralized preparation in PD is not feasible. So, alternatively, PD developed a dispensing circuit and informative material for nursing staff for the correct dosage and traceability of vial batches. In all stages, the use of vials was optimized with strategies such as the selection of adequate packaging material, the grouping of patients, or the exchange of vials between vaccination centers.

What has been achieved?

We received 16230 vaccine vials from four different commercial brands. There have been no incidents related to the receipt and storage of vaccines.
A total of 9753 doses were made. In the whole elaboration process, we only wasted a vial on one occasion and a dose on another.
We dispensed 11911 vaccine vials to the general population. Of these, 13 vials were discarded due to errors in the preparation.

What next?

The development of a specific plan has made it possible to optimize the COVID-19 vaccination process in our hospital. The plan will be adapted and updated according to the updates of the national and community vaccination strategies.

Aflibercept redosification impact in a second-level hospital.

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European Statement

Production and Compounding

Author(s)

Javier Alfonso Buendía Moreno, Andrea Portela Sotelo, Lidia Martínez Valdivieso, Jaime Fernandez-Bravo Rodrigo, Gema Marcos Pérez, Dolores Barreda Hernandez

Why was it done?

Aflibercept is an Agent against Vascular Endothelial Growth Factor A (VEGF-A) whose intravitreal indications such as Age-related Macular Degeneration (AMD), Macular Edema (ME), Retinal Vein Occlusion (RVO), have a high economic impact on a Pharmacy Service (PS) budget.

What was done?

A protocol for the redosification of aflibercept intravitreal therapy was implemented by the Commission of Pharmacy and Therapeutics and the Ophthalmology Service, which proposed the redosification of aflibercept vials into sterile syringes for intravitreal use.

How was it done?

Aflibercept 4 mg vials were recompounded by infirmary staff in a horizontal laminar air flow cabinet into syringes with the recommended dosage of 2 mg, hence one vial could approximately be fractionated for the production of 2,5 syringes.
The variables compiled to maintain the trazability of aflibercept through the programmes of computerized clinical history, MambrinoXXI® and electronic prescription, Farmatools®, were: sex, age, indications, number of spent vials and syringes prepared and average number of syringes dispensed per patient. In addition, it was compared the direct estimated cost of the syringes vs. vials to calculate the saving cost.

What has been achieved?

During the year 2019, 305 patients received aflibercept syringes, 172 (56’4%) were male, the average age was 76 years (41-95). Main diagnoses were 145 AMD, 71 ME, 43 diabetic ME and 33 RVO. The total numbers of vials spent were 341, the syringes dispensed were 1174 and the average number of syringes dispensed per patient was 3’85. The total price of one vial was 612’31€, so one redosificated syringe in the PS approximately costs 204’10€. Therefore the use of syringes instead of vials had a potential saving cost of 331.672€ (58’01%) if the vials would have been used. The cost reduction of the intravitreal therapy with aflibercept supposed a saving of 1’58 % of the total expenditure of the PS during 2019.

What next?

The optimization of aflibercept intravitreal therapy is a big cost-effective measure for reducing costs in a PS. It helps to reduce costs in a therapy that is increasing the number of patients each year contributing to the financial sustainability of Health Systems and improves the efficacy of the resources of PS.

IMPLEMENTING THE PRODUCTION OF STERILISED SYRINGES IN THE HOSPITAL: IMPROVING MEDICATION SAFETY AND SAVING HEALTHCARE COSTS

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European Statement

Patient Safety and Quality Assurance

Author(s)

Karin Larmene-Beld, Rommert Wijnsma, Gerrit de Weerd, Maarten Postma, Erik Frijlink, Katja Taxis

Why was it done?

Medication administration errors are common in hospital practice. Meta-analyses suggest that about 10% of administrations are erroneous, with much higher error rates occurring during intravenous drug administrations. It has been demonstrated that 21% of the errors can be eliminated when prepared syringes are used. Many countries struggle with the problem of optimising the process of safe parenteral medication in hospitals. Different guidelines across countries outline how preparation of parenteral medication in the clinical environment should be done. Recently the Council of Europe published a resolution about preparation of medication which encourage the supply of ready-to-administer products by the pharmacy. Moving the activities of preparation of medication from the clinical environment to the pharmacy requires investments in pharmacy equipment but will result in efficacy, better quality and reduction in preparation medication errors in the hospital.

What was done?

Development and implementation of sterilisable plastic syringes produced in the hospital pharmacy for large-scale production of ready-to-administer products.

How was it done?

A new development in this area are ready-to-administer pre-filled sterilised syringes (PFSS) produced by the pharmacy. PFSS are produced on stock under GMP conditions by the hospital pharmacy using (semi) automatic filling and closing machines whereby quality and safety are embedded in the whole process of manufacturing. A total cost of ownership analysis is performed showing PFSS prepared in the hospital pharmacy yielded cost savings compared to conventional preparation on the ward. The process of production, filling, closing and sterilisation has been validated using newly acquired equipment. With the introduction of the cyclic olefin polymer (COP) syringes a new type of primary container is implemented in the pharmacy. To ensure patient safety and product quality a science- and risk-based strategy has been developed for testing extractables and leachables to qualify the new container as primary packaging material.

What has been achieved?

Introducing PFSS is cost saving for the healthcare system:– COP syringes are suitable as primary packaging material; –enhancement styles for better readability of labels are established; and – already, 15 products are validated and available for use in the hospital.

1. KHM Larmené-Beld KHM, Touwen-Spronk J, Luttjeboer J, et al. A cost minimization analysis of ready-to-administer pre-filled sterilized syringes in a Dutch hospital.. Submitted for publication in Clinical Therapeutics.
2. Larmené-Beld K, Kuiper A, van Berkel S, et al. A science- and risk-based strategy to qualify sterilized prefilled syringes as primary packaging material in a hospital pharmacy. Abstract submitted for 24th EAHP Congress.
3. Larmené-Beld KHM, Kim Alting E, Taxis K. A systematic literature review on strategies to avoid look-alike errors of labels. Eur J Clin Pharmacol 2018 74:985–93.

What next?

Introducing more drugs as ready-to-administer products. Optimising the label of ready-to-administer syringes to avoid look-alike errors based on the results of the review.

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