06.12.19
Moulding The Future With 3D Printing
Source : NHE Nov/Dec
Professor Peter Marsden, head of Medical Physics & Biomedical Engineering, UCLH
3D printing is a relatively new technology with a rapidly growing number of applications. However, scientists and engineers in the Department of Medical Physics and Biomedical Engineering at University College London Hospitals NHS Foundation Trust (UCLH) in Central London have been using the technology for the benefit of healthcare for nearly 20 years.
Data obtained from CT scans are used to create maps of anatomical structures which can be programmed in to sophisticated printers to create life-sized models of the originals. One of the first applications introduced at UCLH is to model craniofacial defects caused by trauma or disease and to create a bespoke digital surface as a perfect fit to restore the original anatomy.
A 3D model of the anatomy is used to form a mould which shapes a sheet of titanium in a hydraulic press. Skilled mechanical engineers then ensure the metal plate is a perfect fit to the anatomical model. For lateral defects, clinical scientists and software engineers create mirror images of the respective surfaces on the healthy side of the head.
A later development was to print accurate 3D replicas of craniofacial bone structures to assist surgeons in planning complex operations. This helps improve surgical outcomes and reduced operation times. Anatomical models are also routinely used in junior doctor training. The next phase of development is to expand 3D printing to produce surgical guides using bio-compatible materials, which will help surgeons to achieve the best results and even shorter operation times.
The department’s Mechanical Workshop has recently acquired additional 3D resin printers that allow the use of many different types of materials, eg. tough, durable, flexible and bio-compatible resins. Engineers now design a range of bespoke parts for use within the hospital. By printing lost or damaged parts for various equipment they have saved the Trust several thousand pounds in the first year of operations.
They routinely print parts for patient monitors and recently designed and printed specialised carriages for network switches and various accessories required for upgrades to theatre equipment and a bespoke protective funnel which was then mounted onto a trolley to allow safe transportation of delicate fibre optic and laser equipment.
The team is currently manufacturing a MRI scanner model for use in educating young patients prior to treatment. This new technology allows engineers to be virtually unrestricted when designing bespoke solutions which ultimately benefit patient care and experience.
As an early adopter of 3D printing technology, Medial Physics have brought benefits to UCLH and many other NHS hospitals that use their services.