BIM
happening in the delivery of pharmacy aseptic suites. This problem was highlighted in a 2018 NHS Improvement ‘Review of Pharmacy Aseptic Services’,1
which noted the
increasing demand for on-site aseptically prepared treatments, at an annual growth rate of around 5%, and emphasised the ‘asset intensive’ nature of these services, with the requirement for their ongoing maintenance and periodic renewal of the estate and equipment. Tellingly, numerous common problems in the design of aseptic facilities that prevent them functioning as planned were revealed, including: n low-quality builds, or delays in new facilities due to construction by contractors lacking ‘cleanroom’ experience;
n insufficient local experience to plan, manage, and troubleshoot projects;
3D modelling, including the detailing of associated services, and incorporating the supplier models, with embedded COBie on a construction project.
n lack of understanding of maintenance and service costs.
Case study: Design and construction of hi-tech pharma facilities, Weston Park Hospital
A project to create a new Advanced Therapy Medical Product (ATMP) and Clinical Trials (CT) aseptic suite, plus a refurbished pharmacy Chemotherapy Aseptic Dispensing Unit, at Weston Park Hospital, part of the Sheffield Teaching Hospitals NHS Foundation Trust, offers a useful example of how digital software can enhance a turnkey BIM designed and delivered project. The project, a refurbishment within existing buildings, has been delivered in two phases: Phase 1 has delivered the high-specification chemotherapy aseptic dispensing facility, sited in redundant office space, while Phase 2 has seen the former pharmacy refurbished as the new aseptic suite for ATMP, which requires sophisticated storage, reconstitution, and handling procedures. These new facilities at Weston Park will future-proof the hospital’s on-site capacity for drug preparation.
The complexity of this project required a sophisticated joined-up multidisciplinary approach. BES engaged closely with the hospital’s Estates team and senior pharmacist to eliminate any risk from overlooked details or construction issues. Key design considerations included:
n Verification of the structural loading capacity of the existing slab in the main corridor to ensure it could support two air-handling units.
n Phase 1: Ensuring compliance with cleanroom grades: designing a pressure cascade from high to low
50 Health Estate Journal March 2023
Weston Park Hospital, Sheffield – the site of a two-part project to create a new Advanced Therapy Medical Product (ATMP) and Clinical Trials (CT) aseptic suite, and a refurbished pharmacy Chemotherapy Aseptic Dispensing Unit.
pressure requirements.
n Phase 2: Remodelling of existing accommodation to enable effective segregation between isolator rooms, maintenance of air pressure regimes, and airflow, designed to minimise contamination risks.
n Installation of a new BMS (building management system) for constant monitoring of the temperature, humidity, and air pressure.
n Fault monitoring to ensure that fans are
repaired and filters changed before faults can arise.
The facilities were designed using 3D Revit modelling. The new pharmacy aseptic suite is heavily serviced, and the 500 mm void had to accommodate both new and some existing services routes. Revit was an integral part of a collaborative process to develop the details on an ongoing basis, with validation of the project also beginning at the design stage.
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