510(k) Submissions for Coagulation Instruments - Guidance for Industry and FDA Staff
Document issued on: June 19, 2003
For questions regarding this guidance, contact Valerie R. Dada at (301) 594-1243 or by email at email@example.com.
Contains Nonbinding Recommendations
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Table of Contents
Guidance for Industry and FDA Staff
510(k) Submissions for Coagulation Analyzers
FDA has developed this draft guidance document to assist industry in preparing premarket notification submissions (510(k)s) for the instrument component of laboratory-based coagulation test system(s). FDA recognizes that multiple assays or reagents reasonably be evaluated in one submission (see also “Assessing User Fees: PMA Supplement Definitions, Modular PMA Fees, BLA and Efficacy Supplement Definitions, Bundling Multiple Devices in a Single Application, and Fees for Combination Products; Guidance for Industry and FDA)1. Consistent with that policy, we recommend that you submit one application in the following situations:
FDA's guidance documents, including this guidance, do not establish legally enforceable responsibilities. Instead, guidances describe the Agency's current thinking on a topic and should be viewed only as recommendations, unless specific regulatory or statutory requirements are cited. The use of the word should in Agency guidances means that something is suggested or recommended, but not required.
The Least Burdensome Approach
The issues identified in this guidance document represent those that we believe need to be addressed before your device can be marketed. In developing the guidance, we carefully considered the relevant statutory criteria for Agency decision-making. We also considered the burden that may be incurred in your attempt to comply with the guidance and address the issues we have identified. We believe that we have considered the least burdensome approach to resolving the issues presented in the guidance document. If, however, you believe that there is a less burdensome way to address the issues, you should follow the procedures outlined in the “A Suggested Approach to Resolving Least Burdensome Issues” document.
A manufacturer who intends to market a device of this generic type should (1) conform to the general controls of the Federal Food, Drug & Cosmetic Act (the Act), including the premarket notification requirements described in 21 CFR 807 Subpart E, (2) address the specific risks to health associated with coagulation analyzers identified in this guidance and, (3) obtain a substantial equivalence determination from FDA prior to marketing the device, unless exempt from the premarket notification requirements of the Act (refer to 21 CFR 807.85).
This guidance document identifies the classification regulations and product codes for the coagulation analyzers (Refer to Section 4 – Scope). In addition, other sections of this guidance document list the risks to health identified by FDA and describe measures that, if followed by manufacturers and combined with the general controls, will generally address the risks associated with these coagulation analyzers and lead to a timely premarket notification [510(k)] review and clearance. This document supplements other FDA documents regarding the specific content requirements of a premarket notification submission. You should also refer to 21 CFR 807.87 and other FDA documents on this topic, such as Premarket Notification 510(k).
Under “The New 510(k) Paradigm - Alternate Approaches to Demonstrating Substantial Equivalence in Premarket Notifications; Final Guidance ,” 2a manufacturer may submit a Traditional 510(k) or has the option of submitting either an Abbreviated 510(k) or a Special 510(k). FDA believes an Abbreviated 510(k) provides the least burdensome means of demonstrating substantial equivalence for a new device, particularly once FDA has issued a guidance document. Manufacturers considering modifications to their own cleared devices may lessen the regulatory burden by submitting a Special 510(k).
An Abbreviated 510(k) submission must include the required elements identified in 21 CFR 807.87, including the proposed labeling for the device sufficient to describe the device, its intended use, and the directions for its use. In an Abbreviated 510(k), FDA may consider the contents of a summary report to be appropriate supporting data within the meaning of 21 CFR 807.87(f) or (g); therefore, we recommend that you include a summary report. The report should describe how this guidance document was used during the device development and testing and should briefly describe the methods or tests used and a summary of the test data or description of the acceptance criteria applied to address the risks identified in this document, as well as any additional risks specific to your device. This section suggests information to fulfill some of the requirements of 807.87 as well as some other items that we recommend you include in an Abbreviated 510(k).
If it is not clear how you have addressed the risks identified by FDA or additional risks identified through your risk analysis, we may request additional information about aspects of the device’s performance characteristics. We may also request additional information if we need it to assess the adequacy of your acceptance criteria. (Under 21 CFR 807.87(l), we may request any additional information that is necessary to reach a determination regarding substantial equivalence.)
As an alternative to submitting an Abbreviated 510(k), you can submit a Traditional 510(k) that provides all of the information and data required under 21 CFR 807.87 and described in this guidance. A Traditional 510(k) should include all of your methods, data, acceptance criteria, and conclusions. Manufacturers considering modifications to their own cleared devices should consider submitting Special 510(k)s.
3Refer to Indications for Use Form for the recommended format.
4If FDA makes a substantial equivalence determination based on acceptance criteria, the subject device should be tested and shown to meet these acceptance criteria before being introduced into interstate commerce. If the finished device does not meet the acceptance criteria and, thus, differs from the device described in the cleared 510(k), FDA recommends that submitters apply the same criteria used to assess modifications to legally marketed devices (21 CFR 807.81(a)(3)) to determine whether marketing of the finished device requires clearance of a new 510(k).
5See Required Elements for a Declaration of Conformity to a Recognized Standard (Screening Checklist for All Premarket Notification [510(K)] Submissions).
The device technology may include, but is not limited to, the following automated methodologies: optical, fluorescence, mechanical, and impedance. This generic type of device includes:
21 CFR 864.5400. Coagulation instrument. A coagulation instrument is an automated or semi-automated device used to determine the onset of clot formation for in vitro coagulation studies.
The product codes are:
21 CFR 864.5425 Multipurpose system for in vitro coagulation studies . A multipurpose system for in vitro coagulation studies is a device consisting of one automated or semi-automated instrument and its associated reagents and controls. The system is used to perform a series of coagulation studies and coagulation factor assays.
These generic coagulation instruments are Class II, Hematology and Pathology Devices Panel.
There are no known direct risks to patient health. However, failure of the test system to perform as indicated or an error in interpretation of results may lead to improper patient management.
In the table below, FDA has identified the risks to health generally associated with the use of the coagulation analyzers addressed in this document. The measures recommended to mitigate these identified risks are given in this guidance document, as shown in the table below. We recommend that you conduct a risk analysis, prior to submitting your premarket notification, to identify any other risks specific to your device. The premarket notification should describe the risk analysis method. If you elect to use an alternative approach to address a particular risk identified in this document, or have identified risks additional to those in this document, you should provide sufficient detail to support the approach you have used to address that risk.
General Study Recommendations
Whenever possible, we recommend that you include patient samples or sample pools, derived from the intended use population (e.g., patients under evaluation for coagulation abnormalities) for the analytical protocols described below. We recommend that you conduct your studies using a final production model device, and not a prototype.
FDA recommends that you evaluate the analyzer in at least two external sites in addition to that of the manufacturer. Generally, we recommend that performance be assessed in the testing environment where the device will ultimately be used (i.e., central laboratory) by individuals who will use the test in clinical practice (e.g., trained technologists). We recommend that you initially analyze data separately to evaluate any inter-site variation and include results of the analysis in the 510(k) summary report. You can pool method comparison results from the individual sites in the package insert if you demonstrate that there are no significant differences in the results among sites. Before initiating any clinical study, you may contact the Division of Immunology and Hematology Devices.
Although spiked samples can be used to supplement the studies, FDA cautions against using spiked samples as the only matrix in the evaluations, because spiked samples may not provide an accurate assessment of the performance characteristics. FDA recommends that you do not use hemolysates (often found in control or calibrator material) in the analytical studies because these specimens may not test the effects of all preparatory steps on test performance.
So that acceptance criteria or data summaries can be best interpreted during the review, we recommend that you provide appropriate specifics concerning protocols. These specifics are also necessary to aid users in interpreting information in your labeling. For example, when referring to NCCLS protocols or guidelines, we recommend that you indicate which specific aspects of the protocols or guidelines you followed.
Specific Performance Characteristics
How to Define and Determine Reference Intervals in the Clinical Laboratory; Approved Guideline—Second Edition, NCCLS document C28-A2, (ISBN P56238-269-I), NCCLS, 940 West Valley Road, Suite 1400, Wayne, PA 19087-1898, 2000.
We recommend for coagulation analyzers that you compare your device to a legally marketed predicate device or appropriate reference method with the same intended use as the analyzer you intend to market. As with studies to evaluate performance characteristics, you may contact the Division of Immunology and Hematology Devices for FDA input on your study plan prior to initiating comparison studies.
FDA recommends that you follow guidelines provided in the document, “Method Comparison and Bias Estimation Using Patient Samples; Approved Guideline” (1995) NCCLS, Document EP9A concerning experimental guidelines and statement of performance characteristics.
Banked (retrospective) samples may be appropriate for some studies as long as information below concerning sample characterization is available.
Specimen collection and handling conditions
We recommend that you substantiate statements in your labeling about specimen storage and transport by assessing whether the device can maintain acceptable performance (e.g., precision) over the storage times and temperatures recommended to users. For example, an appropriate study may include an analysis of aliquots stored under the conditions of time, temperature, or allowed number of freeze/thaw cycles. We recommend that you state the criteria for acceptable range of recoveries under the recommended storage and handling conditions.
Sample selection, inclusion and exclusion criteria
We recommend that you evaluate patient samples from the target population specified in your intended use, (i.e., with and without the test parameter of interest) with parameter values distributed across the reportable range of the assay, including specimens that are close to the clinically relevant decision point(s). Regardless of whether prospective or retrospectively collected samples are used, FDA suggests that you provide a clear description of how the samples were selected, including reasons that samples are excluded. We recommend that you indicate whether samples are chosen from patients with specific clinical outcome or other characteristic.
Appropriate sample size depends on factors such as precision, interference, range, and other performance characteristics of the test. We recommend that you provide a statistical justification to support the study sample size. The number of patients should be large enough so that inter-individual variation would be observed.
Presentation of results
We recommend that you conduct separate analyses of data for each group that you study. When providing the results of the method comparison study, we recommend that you include the following information:
The premarket notification should include labeling in sufficient detail to satisfy the requirements of 21 CFR 807.87(e). The following suggestions are aimed at assisting you in preparing labeling that satisfies the requirements of 21 CFR 807.87(e).6
6Although final labeling is not required for 510(k) clearance, final labeling must comply with the requirements of 21 CFR 801 [IF IVD DEVICE INSERT: or 21 CFR 809.10] before a medical device is introduced into interstate commerce. In addition, final labeling for prescription medical devices must comply with 21 CFR 801.109. Labeling recommendations in this guidance are consistent with the requirements of part 801 801 and section 809.10.