Systematic Literature Reviews for EU MDR Compliance

A guide to Systematic Literature Reviews as critical components in effective MDR compliance strategies

What is a Systematic Literature Review?

A Systematic Literature Review is a structured and objective process which identifies, critically appraises and analyses clinical evidence in order to answer carefully formulated research questions. It involves a thorough, methodical search of databases such as PubMed and Google Scholar to identify all literature sources relevant to the clinical background / SOTA and/or the subject device.

A Systematic Literature Review should be performed in line with a search protocol, setting out the search terms to be used, inclusion/exclusion criteria, appraisal framework, analysis criteria and justifications for decisions. It should also identify requirements for the qualifications of the individuals assigned to the review.

Systematic Literature Reviews form a important component of MDR compliance, forming key aspects of Clinical Evaluation, Risk Management and other parts of all effective MDR regulatory strategies.

What is the role of Systematic Literature Reviews in achieving MDR compliance?

Systematic Literature Review is a pivotal component of the Clinical Evaluation of medical devices under the MDR. The importance of a systematic review of available evidence through literature review is emphasised repeatedly in MedDev 2.7/1 rev 4 and is crucial in ensuring compliance with the new EU MDR.

1. Clinical Evaluation

Clinical Evaluation draws generated data from general/device specifications, Systematic Literature Reviews, Post-Market Surveillance, Post-Market Clinical Follow-up, Vigilance and Risk Management, which are used in the Clinical Evaluation Report
Fig 1: Where Systematic Literature Reviews sit within Clinical Evaluation activities

Systematic Literature Reviews are a pivotal component of medical device Clinical Evaluation. According to MedDev 2.7/1 rev 4, a Systematic Literature Review is essential for identifying safety and/or performance data relating to both the clinical background / state-of-the-art and to the subject device itself.

The Clinical Evaluation Plan (CEP) should set out a carefully designed literature search and review protocol to guide conduct of the evaluation and ensure that objective, rigorous standards are adhered to.

Systematic Literature Reviews are even more important in the event of a claim of equivalence, since the results of literature review on the equivalent device will stand in place of a clinical investigation of the device under consideration.

It can be expected that the methodology and conduct of Systematic Literature Reviews will be intensely scrutinised by Clinical Evaluation Report reviewers, so ensure you have the right advice and the right approach to this crucial aspect of Clinical Evaluation.

2. PMS & PMCF

As part of the Quality Management System (QMS), manufacturers are expected to implement and maintain a Post-Market Surveillance (PMS) system that routinely evaluates the clinical performance and clinical safety of the device. The scope and nature of such PMS should correspond to the device and its intended use. PMS creates new data on a frequent basis (e.g. safety reports, results from published literature, registries, PMCF Studies, and other data about device usage). These data must be analysed for information that has the potential to alter the risk/benefit profile, as well as the clinical performance and clinical safety of the device.

Post-Market Clinical Follow-up (PMCF) activities should include scope for a regular, scheduled systematic review of the medical literature throughout the lifetime of a device; in turn, the results will inform the PMS Report / PSUR, PMCF Report and the Clinical Evaluation Report (CER).

3. To establish state-of-the art (SOTA)

A systematic review of the literature is essential for identifying and analysing sources of clinical data relating to the clinical background and state-of-the-art. As per MedDev 2.7/1 rev 4:

The state of the art embodies what is currently and generally accepted as good practice. The most technologically advanced solution is not always the state-of-the-art.

According to the MedDev guidelines, a literature review should be used to describe the clinical background and identify current knowledge / state-of-the-art in the corresponding medical field of the subject device.

Consideration of evidence relating to comparable alternatives to the subject device should enable the determination of safety and performance benchmarks against which the subject device may be compared in the Clinical Evaluation.

The applicability of a state-of-the-art review is not restricted to Clinical Evaluation – it can also be vital in competitor analysis, market analysis, and in identifying opportunities for product improvement or innovation. If your device is new to market, speak to a member of our team about using literature reviews in preparing for market.

4. Risk Management

A Systematic Literature Review of independently published evidence also forms a key input into the Risk Management process. It’s an essential step in identifying hazards (including hazards due to substances, technologies, and manufacturing procedures) and in producing evidence-based estimates of the probability and severity of risk.

Regular literature reviews can help ensure that Risk Management remains current and up to date. relating to subject device and/or equivalent device can contribute to an effective Risk Management process.

An ongoing literature search and review enables proactive Risk Management by allowing organisations to identify and escalate concerns as they arise or before they become apparent, allowing them to take a proactive and dynamic approach to Risk Management.

How to structure a Systematic Literature Review

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According to MedDev 2.7/1 rev 4, a Systematic Literature Review should include the following information:

  • Introduction to the subject device
  • Objectives/purpose of the literature review
  • Search protocol which includes inclusion-, exclusion criteria and an appraisal- and analysis plan
  • Research questions that set out what you intend to discover from the literature review
  • Search terms
  • Analysis and appraisal of the literature identified
  • Safety and performance benchmarks identified from the analysis
  • List of exclusions and justification

Each component should be properly planned and prepared to ensure that the document is understandable by a reviewer who may not be familiar with the medical device.

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