Implantable/Invasive Medical Device

This roadmap describes the journey of implantable/invasive medical devices from basic research, concept development down to clinical testing and entry to market. Each device is different but this toolkit provides guidance on what to expect when developing invasive medical devices in an academic setting.

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D1
Basic Research

Basic research that generates new knowledge, insights, methods or technologies, but has no immediate health & care application.
[TRL 1]

D2
Strategic Research

Research that addresses a class of health & care problems, developing knowledge, insights, methods or technologies that may underpin innovative solutions.
[TRL 1]

D3
Concept Development

Research that draws on existing knowledge, insights, methods or technologies to develop the concept for an innovative solution to a specific health & care problem.
[TRL 2]

D4
Prototype Development & Technical Feasibility

Research that develops the proposed health & care innovation and provides initial evidence for the feasibility of the proposed innovation.
[TRL 3, 4]

T1
Product Development & Healthcare Feasibility

Research that further develops the proposed health & care innovation and provides reproducible evidence for its efficacy and safety in a relevant environment.
[TRL 5, 6]

T2
Product Testing & Proof-of-value

Investigations that evaluate the proposed innovation in a health & care setting, providing actionable evidence of its efficacy, effectiveness and safety in a patient population.
[TRL 7]

T3
Regulatory Approvals & Route-to-market

Activities that finalise the regulatory approvals, and the commercialisation, implementation and scaling-up strategies for the health & care innovation.
[TRL 8]

T4
Product Launch & Real-world Learning

Activities that lead to product launch, and evaluation of the real-world effectiveness and safety of the innovation, to avoid harm and inform future developments.
[TRL 9]

D1: Basic Research

Basic research that generates new knowledge, insights, methods or technologies, but has no immediate health & care application.
[TRL 1]


Developing novel methods and materials not targeted at a specific health & care application and not for human use.

  • R&D1:

    Develop generic methods and technology including assessments of biological relevance and indications of biocompatibility

  • BM1:

    Understand IP management and contract-related research disclosure agreements

Potential funding sources

UKRI, Wellcome Trust, Leverhulme Trust, Royal Society, Royal Academy of Engineering, Horizon Europe, Other charities, Companies, internal pump priming schemes

Deliverables
  • Generic methods, technology, or materials with indicative evidence of performance (biologically relevant but not for human use).

  • For novel materials, characterisation of the materials system properties and performance in non-biological systems.

D2: Strategic Research

Research that addresses a class of health & care problems, developing knowledge, insights, methods or technologies that may underpin innovative solutions.
[TRL 1]


Developing methods and materials to address a health & care clinical need area.

  • R&D1:

    Develop generic methods and technology of device components, following good laboratory practice (GLP) principles and accurate / detailed record keeping

  • R&D2:

    Perform scientific literature review; applied methods and technology development based on available health & care data to identify potential application areas within biological environment, understand biocompatibility, toxicity issues, and biodegradability (if applicable)

  • HEST1:

    Identify potential areas for current and foreseeable healthcare applications

  • R1:

    Consider regulatory approval and other governance issues (e.g. MTAs, HTA) for in vitro and in vivo testing of the material and understanding ethical approvals for testing of medical devices in clinical investigations (including contracts and sponsorship).

  • BM1:

    Consider IP protection (e.g. patenting), record funding and contracts for IP ownership

Potential funding sources

UKRI, Wellcome Trust, Leverhulme Trust, Royal Society, Rosetrees Trust, Royal Academy of Engineering, Horizon Europe, Other charities including condition-specific charities, Internal translational funding calls, Companies

Deliverables
  • Understanding of potential use in healthcare setting

  • Understanding of issues around biocompatibility, toxicity, and efficacy in biological systems

  • Finding / creating indicative evidence from literature or early studies on performance

  • Initiate IP protection if applicable

D3: Concept Development

Research that draws on existing knowledge, insights, methods or technologies to develop the concept for an innovative solution to a specific health & care problem.
[TRL 2]


Reaching out to stakeholders from STEM, applied health research and clinical practice to provide insights necessary todesign and develop an innovative concept/device for addressing a specific health & care problem.

  • R&D2:

    Record device requirements, prior knowledge, and evidence of a valid clinical association to inform device specification

  • R&D3:

    Prototype design and development (not for human use). Assess efficacy in preclinical models (in vitro, ex vivo, and in vivo – small and large animal models)

  • R&D4:

    Consider human factors that can influence concept design and development (e.g. will the device need removing? what are the consequences if not?)

  • R&D5:

    Consider responsible innovation, including potential effects on the environment, that can influence concept design and development

  • HEST1:

    Understand current and foreseeable specific health & care need

  • HEST2:

    Understand current and foreseeable clinical care pathway and guidelines of care for the specific clinical need

  • HEST3:

    Understand current and foreseeable clinical care workflow and current gold standard of care for the specific clinical need

  • HEST4:

    Draft plans describing how the device will affect and integrate with current and foreseeable service/clinical practice

  • HEST5:

    Prepare initial target product profile to define an outline of the value proposition – what is the expected benefit of the device in terms of costs, patient care. Consider competing solutions (existing or currently under development) which might impact the clinical need, guidance, workflows or pathways. This will be needed for funding applications and the technical file.

  • HEST6:

    Conceptualise health economics evaluation and cost benefit analyses (“desk research”, literature review) and conceptualise a preliminary health economic model which will inform concept development (considering current and upcoming competing solutions).

  • R1:

    Arrange ethical approvals (including sponsorship) for suitable (pre)clinical testing of concept

  • R2:

    Formalise intended use (based on HEST2/3); Understanding of device regulations and risk classification to inform concept development (including identification of regulatory steps needed for future clinical testing)

  • R3:

    Understand the requirements for accurate audit trail / traceability of prototype device development is in place through a quality management system.

  • P&D1:

    Development of prototype and design initial production process (not for human use) with view to adapt (for human use) and scaling up considering regulatory implications for clinical investigations.

  • BM1:

    Consider additional IP protection based on concept development (could include design and manufacturing processes), consider freedom to operate; record funding and contracts for IP ownership.

  • BM2:

    Understand the market and its size to determine commercial opportunities and potential economic impact

  • BM3:

    Understand of potential market share based on competing solutions and analysis of competitors

  • BM4:

    Understand on the nature of the intervention within the clinical landscape and consider plans for delivering device to market

  • BM5:

    Understand potential exit strategies such as commercialisation venues (e.g. spin-out vs license vs not-for-profit (e.g. via community interest company))

  • HCE1:

    Collect patient and end user feedback of concept

Potential funding sources

UKRI, Wellcome Trust, Rosetrees Trust, Royal Academy of Engineering, Horizon Europe, Other charities including condition-specific charities, LifeArc, NIHR, Internal translational funding calls, Companies.

Deliverables
  • Clearly articulated health & care need

  • Solution concept and prototype device manufacturing including plans for scaling up production with clinically relevant methods.

  • Draft of intended use statement

  • Draft of initial value proposition and target product profile

  • Ethical approval ready for preclinical testing in D4 (small and/or large animal models)

  • Initial indications of market potential / opportunity (including product/market fit)

D4: Prototype Development & Technical Feasibility

Research that develops the proposed health & care innovation and provides initial evidence for the feasibility of the proposed innovation.
[TRL 3, 4]


Obtain proof-of-concept of feasibility and efficacy of the prototype device in preclinical model(s). This may be an iterative process that requires testing of multiple different prototypes.

  • R&D3:

    Full prototype (human use) development, manufacture at good manufacturing practice (GMP) level, and complete pre-clinical testing

  • R&D4:

    Include human centric design principles in prototype

  • R&D5:

    Ensure prototype design meets regulatory and GMP manufacturing requirements, is sustainable in design, is sourced from ethically verified materials and its manufacture is auditable. This can be performed by external industry partner/ test house

  • R&D6:

    Determine if biocompatibility / toxicity / biodegradability and formulation of prototype device with methods and materials that are suitable for (human) use in a clinical setting and compare to current clinical solutions. This can be performed by external industry partner/ test house

  • R&D7:

    Adapt prototype based on pre-clinical data and key stakeholder feedback to ensure health and care feasibility will be achieved (design input)

  • HEST4:

    Review how the device will affect current and foreseeable service/clinical practice

  • HEST5:

    Review the value proposition for the developed prototype highlighting benefits compared to current gold standard of care and existing competing solutions.

  • HEST6:

    Review the conceptualised health economics model and cost benefit analyses which will inform on what data needs to be collected.

  • R1:

    Prepare ethics and research governance applications (including sponsorship) for clinical investigations / feasibility studies in T1 – T4 stages

  • R2:

    Determine device categorisation and necessary regulatory approvals required.

  • R3:

    Ensure accurate audit trail / traceability of prototype device development (inc. device materials, design iterations and equipment uses) is in place for example by working through a quality management system (ISO 13485)

  • R4:

    Initialise a technical file (incl. risk assessment), determine the documentation required for MHRA notification for clinical investigation approval

  • R5:

    Understand the requirements for Regulatory Approvals (e.g. CE/UKCA/FDA/other). Ensure requirements for clinical investigation standards are met.

  • P&D1:

    Optimise the full prototype (if applicable) for human use and refine production methods for preclinical testing. Seek industry partners (including service providers, suppliers, manufacturers and distributors - also considering start-up formation)

  • P&D2:

    Develop testing protocols for the full prototype in pre-clinical models and understanding of protocols for the final product required for clinical investigations.

  • P&D3:

    Test compliance with technical file requirements (safety, compliance, interoperability and usability)

  • P&D4:

    Conduct quality control of the prototype according to product specifications

  • BM2:

    Identify market (i.e. target payer vs user), finalise market size analysis to determine if there is a viable market

  • BM3:

    Refine market share analysis including analysis of competitors and opportunities, and finalise market share assumptions to feed into HEST4

  • BM4:

    Start defining the nature of the intervention within the clinical landscape and initialize plans for delivering device to market

  • BM5:

    Start Exploring potential exit strategies such as commercialisation venues (e.g. spin-out vs license vs not-for-profit (e.g. via community interest company))

  • BM6:

    Draft an outline of the business model (considering future requirements/steps, plan to seek for investors/funding for larger / pivotal / multisite clinical studies)

  • HCE1:

    Evaluate prototype in the competitive landscape based on pre-clinical studies (i.e. how does the prototype compare to gold standard). Create a clinical evaluation plan (CEP) to define the scope and outline the systematic approach of the planned clinical investigation to demonstrate scientific, analytical and clinical validity

Potential funding sources

UKRI, Wellcome Trust, Rosetrees Trust, Royal Academy of Engineering, Horizon Europe, Other charities including condition-specific charities, LifeArc, NIHR, Innovate UK, Internal translational funding calls, Companies

Deliverables
  • Full functional prototype (for human use) with indicative evidence of performance in relevant preclinical models

  • Obtain safety testing certification for full prototype

  • Auditable records available (e.g. QMS) for device component manufacturing and device testing.

  • Revised value proposition and target product profile

  • Finalised intended use statement

  • Potential service providers, suppliers, manufacturers and distributors have been identified

  • Revised summary of market opportunity (demonstrating commercial feasibility and competitiveness)

  • Proposed strategy for delivering the innovation to market (including academic exit strategy)

  • Initial outline business model

  • Initial regulatory risk assessment

  • Initial technical file

  • Clinical evaluation plan

T1: Product Development & Healthcare Feasibility

Research that further develops the proposed health & care innovation and provides reproducible evidence for its efficacy and safety in a relevant environment.
[TRL 5, 6]


Perform feasibility studies in clinical setting (Phase I, first in man study) with refined prototype to generate evidence of health & care relevance and safety in a realistic but controlled health & care setting. This may be an iterative process that requires testing of multiple different prototypes before committing to the final design.

  • R&D6:

    Refine the final prototype for use in a small scale, first in man, feasibility study on small patient groups for usability, safety testing and considerations of efficacy

  • R&D7:

    Adapt prototype based on preliminary clinical data and key stakeholder feedback to ensure health and care feasibility and efficacy will be achieved (design input)

  • R&D8:

    Refine the prototype to ensure health and care effectiveness will be achieved

  • R&D9:

    Completion of R&D activities including the creation of the Device Master List (DML, detailing all processes required to create the device; to include in the technical file) and freeze of the design of the refined product.

  • HEST4:

    Refine how the device will affect current and foreseeable service/clinical practice

  • HEST5:

    Refine a value proposition for the developed prototype highlighting benefits compared to current gold standard of care and existing competing solutions

  • HEST6:

    Refine the conceptualisation of the health economics model and cost benefit analyses which will inform health economics data collection needs

  • R1:

    Gain ethical and research governance clearance (including sponsorship) for current and subsequent clinical studies

  • R3:

    Obtain ISO 13485 Certification, and any other required ISO certificates (e.g. 27001). Relevant ISO standard include (but are not limited to) ISO 10993 (biological testing requirements), ISO 14644 (GMP manufacturing), ISO 14155 (GCP – good clinical practice), ISO 11137-2 ISO 11737 (sterilisation and validation of sterilisation), and ISO 14971 (risk management), ISO 20417 (information to be supplied by manufacturer), ISO 14630 (non-active surgical implants), ISO 15223 (labelling), ISO 11607 (packaging), and ISO 20416 (post market surveillance.) Involve industry partners (e.g. manufacturer) as needed to obtain ISO certification.

  • R4:

    Refine and submit the technical file (e.g. design decisions, regulatory risk assessments, test methods) for MHRA approval for clinical investigation

  • R5:

    Start collecting clinical evidence on efficacy and safety for regulatory compliance (e.g. CE/UKCA/FDA/Other), and if affecting clinical outcomes run the study to accepted good clinical practice (GCP) standards (e.g. ISO 14155)

  • P&D1:

    Work with industry partners (including service providers, suppliers, manufacturers and distributors- also considering start-up formation) to produce the final quality assured product, based on the final prototype, to be used in clinical setting

  • P&D2:

    Develop testing protocols for the final quality assured product in a clinical setting

  • P&D3:

    Test compliance with technical file requirements (safety, compliance, interoperability and usability)

  • P&D4:

    Conduct quality control of the product according to product specifications

  • P&D5:

    Scale up production and batch release (GMP compliant) for first in man clinical investigation

  • BM4:

    Finalise the nature of the intervention within the clinical landscape and initialize plans for delivering device to market

  • BM5:

    Finalise plans for potential academic exit strategies such as commercialisation venues (e.g. spin-out vs license vs not-for-profit (e.g. via community interest company)) to position the proposed intervention within the clinical landscape

  • BM6:

    Refine the business model (considering future requirements/steps, plan to seek for investors/funding for larger / pivotal / multisite clinical studies)

  • HCE1:

    Position of the concept within the competitive landscape and perform health & care risk assessment

  • HCE2:

    Perform clinical evaluation of prototype in first in man, Phase I, clinical investigation study to assess feasibility and safety

  • HCE3:

    Perform clinical evaluation of prototype clinical investigation study to assess feasibility, safety, and efficacy. This can be, but does not need to be, the same clinical investigation undertaken in HCE2.

Potential funding sources

UKRI, Wellcome Trust, Rosetrees Trust, Royal Academy of Engineering, Horizon Europe, Other charities including condition-specific charities, LifeArc, NIHR, Accelerated Access Collaborative (SBRI Healthcare), Innovate UK, Internal translational funding calls, Companies, Venture capitalists

Deliverables
  • Final product (frozen development/design)

  • Submission of the revised technical file and obtain MHRA approval for clinical investigation

  • Refine GMP manufacturing and release of batch for clinical testing

  • Phase I, first in man, safety testing of GMP prototype in small cohorts (10-20) for preliminary feasibility, safety and efficacy assessment, and to inform larger study design

  • Revised value proposition and target product profile

  • Conceptual health economic model with preliminary data

  • Relationships have been established with potential service providers, suppliers, manufacturers and distributors

  • Development process according to ISO13485

  • Revised strategy for delivering the innovation to market (including academic exit strategy)

  • Revised outline business model

  • Evidence of utility in a health and care setting

T2: Product Testing & Proof-of-value

Investigations that evaluate the proposed innovation in a health & care setting, providing actionable evidence of its efficacy, effectiveness and safety in a patient population.
[TRL 7]


Perform pivotal studies in larger cohorts to assess safety, efficacy, and effectiveness.

  • HEST4:

    Refine how the device will affect current and foreseeable service/clinical practice based on your own data acquired in the clinical investigation

  • HEST5:

    Refine the value proposition for the developed prototype by integrating your own data to highlight benefits compared to current gold standard of care and existing competing solutions

  • HEST6:

    Refine health economics evaluation by integrating your own data to inform the cost benefit analyses

  • R1:

    Gain ethical and research governance clearance (including sponsorship) for current and subsequent clinical studies

  • R4:

    Seek approval for subsequent clinical studies. Notify Regulatory Authority (e.g. MHRA in the UK) of any design changes that might have occurred since the first clinical investigation approval

  • R5:

    Refine the technical file for Regulatory Compliance (e.g. CE/UKCA/FDA/Other) (e.g. design decisions, risk assessments, test methods) (engaging notified body)

  • P&D3:

    Test compliance with technical file requirements (safety, compliance, interoperability and usability)

  • P&D4:

    Conduct quality control of the product according to product specifications

  • P&D5:

    Increase manufacturing (if needed) for the larger clinical investigation studies

  • BM4:

    Review commercial strategy to deliver the device to market (consider refinements of the product/service)

  • BM5:

    Review commercial strategy including the academic exit strategy (e.g. spinout vs license)

  • BM6:

    Refine business model to implement future steps

  • BM7:

    Assess the commercial viability of the product to confirm that the manufacturing, distribution and marketing of the device is financially sustainable (including return-on-investment analysis); seek company or venture capitalist funding

  • HCE3:

    Conduct large scale clinical investigation study in relevant patient groups to validate safety and efficacy of the device

  • HCE4:

    Larger scale / pivotal / multisite clinical investigation study in relevant patient groups to validate safety, efficacy and effectiveness of the device. Write a clinical evaluation report (CER) summarising the clinical outcomes of the clinical investigations for inclusion in technical file to notified body.

  • HCE5:

    Initialise plans for post-market surveillance to include in technical plan and clinical follow up

Potential funding sources

UKRI, Wellcome Trust, Royal Academy of Engineering, Horizon Europe, Other charities including condition-specific charities, LifeArc, NIHR, Accelerated Access Collaborative (SBRI Healthcare), Innovate UK, Internal translational funding calls, Companies, Venture capitalists

Deliverables
  • Clinical assessment of feasibility, safety and efficacy in large clinical investigation study

  • Clinical validation of safety, efficacy, and effectiveness in a larger/pivotal clinical study

  • Partnerships have been formed with key stakeholders (e.g. suppliers, service providers, manufacturers, distributors / customers)

  • Clinical Evaluation Report (CER)

T3: Regulatory Approvals & Route-to-market

Activities that finalise the regulatory approvals, and the commercialisation, implementation and scaling-up strategies for the health & care innovation.
[TRL 8]


Obtaining Regulatory approvals; service transformation modelling and health economics modelling to prove benefit of device; development of business plan to attract funding for launch and adoption into market.

  • HEST4:

    Finalise how the device will affect current and foreseeable service/clinical practice (health & care pathway based on your own data acquired in the clinical investigation

  • HEST5:

    Finalise the value proposition for the developed prototype by integrating your own data to highlight benefits compared to current gold standard of care and existing competing solutions

  • HEST6:

    Finalising full Health economics evaluation and cost benefit analyses

  • HEST7:

    Define the end user-business model / procurement case

  • HEST8:

    Consider adoption of the product into policy and/or guidelines as a routine method or approach; NICE Health Technology Evaluation (Early Evaluation Assessment)

  • R5:

    Finalise and submit technical file (e.g. design decisions, risk assessments, clinical evaluation report) for Regulatory Approval (e.g. CE/UKCA/FDA/Other)

  • P&D5:

    Increase manufacturing for future commercialisation / industry adoption following quality assurance processes to ensure safety and compliance with product specifications. If changes in manufacturing are needed, further regulatory approvals might be required.

  • BM6:

    Finalise and implement the chosen full business model

  • BM7:

    Confirm commercial viability of the product; seek company or venture capitalist funding

  • BM8:

    Refine sales and marketing strategy based on business model

  • HCE5:

    Refine and finalise plans for post-market surveillance to include in technical plan and clinical follow up

Potential funding sources

NIHR, Accelerated Access Collaborative (SBRI Healthcare), Horizon Europe, other charities including condition-specific charities, internal translational funding calls, companies, venture capitalists

Deliverables
  • Increase manufacturing for industry adoption

  • Finalised value proposition and target product profile

  • Full health economic analysis

  • Full business model

  • Clinical evaluation report

  • Finalised technical file (including revised regulatory risk assessment) for Regulatory Approval (e.g. CE/UKCA/FDA/Other)

  • Product ready for deployment

  • Sales and marketing plan

  • Post-market surveillance plan / Post-market clinical follow-up plan.

T4: Product Launch & Real-world Learning

Activities that lead to product launch, and evaluation of the real-world effectiveness and safety of the innovation, to avoid harm and inform future developments.
[TRL 9]


Collecting real-world evidence, monitor long term safety, efficacy and usage of the device in the general population. This might inform future improvements of the product which might require additional regulatory approvals.

  • HEST7:

    Monitor the end user-business model / procurement case (e.g. product adoption and effect on service post market); ongoing health economic analysis

  • HEST8:

    Obtaining NICE Health Technology Evaluation recommendation

  • R6:

    Collate post market post-market clinical evidence; update clinical evaluation report annually and maintain quality management system

  • P&D5:

    Ensure that manufacturing is performed at a scale which meets with market demand, or further increase manufacturing output if required. If changes in manufacturing are needed, further regulatory approvals might be required.

  • P&D6:

    Product launch and distribution (including strategies for communication and training processes to increase acceptability by end users)

  • BM8:

    Market and promote of device on new markets

  • HCE5:

    Real world evidence post launch (Phase 4); Post-market surveillance and post-market clinical follow-up of the product to collect data on long-term effectiveness, potential adverse effects, and usage of the device

Potential funding sources

NIHR, Accelerated Access Collaborative (SBRI Healthcare), companies, venture capitalists

Deliverables
  • Product launch, adoption and monitoring

  • End-user business model / procurement case

  • NICE Health Technology Evaluation recommendation (if appropriate)

  • Updated clinical evaluation report (CER) with post-market surveillance data and post-market clinical follow-up data.