[Federal Register Volume 81, Number 31 (Wednesday, February 17, 2016)]
[Pages 8079-8081]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-03153]



Food and Drug Administration

[Docket No. FDA-2015-N-4462]

Point of Care Prothrombin Time/International Normalized Ratio 
Devices for Monitoring Warfarin Therapy; Public Workshop; Request for 

AGENCY: Food and Drug Administration, HHS.

ACTION: Notice of public workshop; request for comments.


SUMMARY: The Food and Drug Administration (FDA) is announcing the 
following public workshop entitled ``Point of Care Prothrombin Time/
International Normalized Ratio Devices for Monitoring Warfarin 
Therapy.'' The purpose of this workshop is to discuss and receive input 
from stakeholders regarding approaches to the analytical and clinical 
validation of point of care (POC) Prothrombin Time/International 
Normalized Ratio (PT/INR) in vitro diagnostic devices for improved 
clinical management of warfarin therapy in addition to describing the 
FDA's process for facilitating the development of safe and effective 
POC and patient self-testing PT/INR devices. The goal of the workshop 
is to seek and identify potential solutions to address the scientific 
and regulatory challenges associated with POC PT/INR devices to ensure 
safety and effectiveness. The public workshop on ``Point of Care

[[Page 8080]]

Prothrombin Time/International Normalized Ratio Devices for Monitoring 
Warfarin Therapy'' that had been scheduled for January 25, 2016, was 
postponed due to unanticipated weather conditions and rescheduled for 
March 18, 2016.

DATES: The public workshop will be held on March 18, 2016, from 8 a.m. 
to 5 p.m. This public workshop is being rescheduled because of a 
postponed meeting announced in the Federal Register of December 15, 
2015 (80 FR 77641), originally scheduled for January 25, 2016. Submit 
either electronic or written comments on the public workshop by April 
18, 2016.

ADDRESSES: You may submit comments as follows:

Electronic Submissions

    Submit electronic comments in the following way:
     Federal eRulemaking Portal: http://www.regulations.gov. 
Follow the instructions for submitting comments. Comments submitted 
electronically, including attachments, to http://www.regulations.gov 
will be posted to the docket unchanged. Because your comment will be 
made public, you are solely responsible for ensuring that your comment 
does not include any confidential information that you or a third party 
may not wish to be posted, such as medical information, your or anyone 
else's Social Security number, or confidential business information, 
such as a manufacturing process. Please note that if you include your 
name, contact information, or other information that identifies you in 
the body of your comments, that information will be posted on http://www.regulations.gov.
     If you want to submit a comment with confidential 
information that you do not wish to be made available to the public, 
submit the comment as a written/paper submission and in the manner 
detailed (see Written/Paper Submissions'' and ``Instructions'').

Written/Paper Submissions

    Submit written/paper submissions as follows:
     Mail/Hand delivery/Courier (for written/paper 
submissions): Division of Dockets Management (HFA-305), Food and Drug 
Administration, 5630 Fishers Lane, Rm. 1061, Rockville, MD 20852.
     For written/paper comments submitted to the Division of 
Dockets Management, FDA will post your comment, as well as any 
attachments, except for information submitted, marked and identified, 
as confidential, if submitted as detailed in ``Instructions.''
    Instructions: All submissions received must include the Docket No. 
FDA-2015-N-4462 for ``Point of Care Prothrombin Time/International 
Normalized Ratio Devices for Monitoring Warfarin Therapy.'' Received 
comments will be placed in the docket and, except for those submitted 
as ``Confidential Submissions,'' publicly viewable at http://www.regulations.gov or at the Division of Dockets Management between 9 
a.m. and 4 p.m., Monday through Friday.
     Confidential Submissions--To submit a comment with 
confidential information that you do not wish to be made publicly 
available, submit your comments only as a written/paper submission. You 
should submit two copies total. One copy will include the information 
you claim to be confidential with a heading or cover note that states 
review this copy, including the claimed confidential information, in 
its consideration of comments. The second copy, which will have the 
claimed confidential information redacted/blacked out, will be 
available for public viewing and posted on http://www.regulations.gov. 
Submit both copies to the Division of Dockets Management. If you do not 
wish your name and contact information to be made publicly available, 
you can provide this information on the cover sheet and not in the body 
of your comments and you must identify this information as 
``confidential.'' Any information marked as ``confidential'' will not 
be disclosed except in accordance with 21 CFR 10.20 and other 
applicable disclosure law. For more information about FDA's posting of 
comments to public dockets, see 80 FR 56469, September 18, 2015, or 
access the information at: http://www.fda.gov/regulatoryinformation/dockets/default.htm.
    Docket: For access to the docket to read background documents or 
the electronic and written/paper comments received, go to http://www.regulations.gov and insert the docket number, found in brackets in 
the heading of this document, into the ``Search'' box and follow the 
prompts and/or go to the Division of Dockets Management, 5630 Fishers 
Lane, Rm. 1061, Rockville, MD 20852.
    The public workshop will be held at FDA's White Oak Campus, 10903 
New Hampshire Ave., Bldg. 31 Conference Center, Rm. 1503 (the Great 
Room), Silver Spring, MD 20993-0002. Entrance for the public meeting 
participants (non-FDA employees) is through Building 1 where routine 
security check procedures will be performed. For parking and security 
information, please refer to: http://www.fda.gov/AboutFDA/WorkingatFDA/BuildingsandFacilities/WhiteOakCampusInformation/ucm241740.htm.

FOR FURTHER INFORMATION CONTACT:  Rachel Goehe, Center for Devices and 
Radiological Health, Food and Drug Administration, 10903 New Hampshire 
Ave, Bldg. 66, Rm. 5533, Silver Spring, MD 20993, 240-402-6565, email: 


I. Background

    Warfarin, an oral vitamin K antagonist, is a commonly prescribed 
anticoagulant drug used to reduce the risk of thromboembolic events. 
Warfarin inhibits the synthesis of clotting factors II, VII, IX, and X, 
in addition to the naturally occurring endogenous anticoagulant 
proteins C and S. The response of individual patients to warfarin is 
highly variable because of factors such as diet, age, and interaction 
with other drugs. As a consequence, it is important that warfarin 
dosage be tailored individually to maintain clinical benefit. The PT 
test is used to determine a patient's clotting time, which the Clinical 
and Laboratory Standards Institute defines as the time in seconds 
required for a fibrin clot to form in a plasma sample after tissue 
thromboplastin and an optimal amount of calcium chloride have been 
added to the sample. It is well-recognized that a PT result obtained 
with one test system cannot be compared to a PT result obtained with 
another test system because of the variety of thromboplastins used in 
different test systems. Therefore, PT test results are converted into a 
standardized unit known as the INR, which was adopted by the World 
Health Organization with the intent to reduce intersystem variation in 
test results. The INR result is used to monitor patients' response to 
    POC PT/INR devices offer an alternative to laboratory-based testing 
and venipuncture, enabling a rapid INR determination from a finger 
stick sample of whole blood. POC devices can be used in a variety of 
settings including, but not limited to, physician's office laboratory, 
anti-coagulation clinic, patient bedside, hospital emergency 
department, and prescription home use. The purpose of POC PT/INR 
testing is to monitor warfarin and to provide immediate information to 
physicians about the patient's anticoagulation

[[Page 8081]]

status so that this information can be integrated into appropriate 
treatment decisions that can improve patient outcomes. POC PT/INR 
testing is increasingly being viewed as a testing modality with 
performance expectations similar to that of traditional laboratory 
testing. From a regulatory standpoint, POC PT/INR devices have been 
reviewed and cleared for prescription use under appropriate 
professional supervision or prescription home use (patient self-
testing), depending on the claimed intended use. For this workshop, 
both settings will be open for discussion.

II. Topics for Discussion at the Public Workshop

    This public workshop will consist of presentations covering the 
topics listed in this document. Following the presentations, there will 
be a moderated panel discussion where participants will be asked to 
provide their perspectives. The workshop panel discussion will focus on 
identifying potential solutions to address the scientific and 
regulatory challenges associated with POC PT/INR devices. In advance of 
the meeting, FDA plans to post a discussion paper outlining FDA's 
current thinking on the various topics mentioned in the following list, 
and invite comment on this from the community.
    Topics to be discussed at the public workshop include, but are not 
limited to, the following:
     Current regulatory process involved with the clearance of 
POC PT/INR devices.
     Current benefit/risk balance of POC PT/INR devices.
     Technological differences amongst marketed POC PT/INR 
devices, advantages and limitations of each technology, and 
comparability of test results obtained using different technologies.
     Challenges associated with correlating results from whole 
blood POC PT/INR devices to conventional plasma-based laboratory tests.
     Appropriate study design for validation and usability 
studies from the perspectives of the Agency, manufacturers and end 
users to help improve our understanding of the accuracy, reliability 
and safety of POC PT/INR devices.
     Types of quality control and the test system elements 
assessed by the controls.
     Challenges associated with different sample matrices 
(venous, fingerstick, arterial).
    Registration: Registration is free and available on a first-come, 
first-served basis. Persons interested in attending this public 
workshop must register online by 4 p.m., March 10, 2016. Early 
registration is recommended because facilities are limited and, 
therefore, FDA may limit the number of participants from each 
organization. If time and space permits, onsite registration on the day 
of the public workshop will be provided beginning at 7 a.m.
    If you need special accommodations due to a disability, please 
contact Susan Monahan, Center for Devices and Radiological Health, 
Office of Communication and Education, 301-796-5661, email: 
Susan.Monahan@fda.hhs.gov no later than March 4, 2016.
    To register for the public workshop, please visit FDA's Medical 
Devices News & Events--Workshops & Conferences calendar at http://www.fda.gov/MedicalDevices/NewsEvents/WorkshopsConferences/default.htm. 
(Select this public workshop from the posted events list.) Please 
provide complete contact information for each attendee, including name, 
title, affiliation, address, email, and telephone number. Those without 
Internet access should contact Susan Monahan (contact for special 
accommodations) to register. Registrants will receive confirmation 
after they have been accepted. You will be notified if you are on a 
waiting list.
    Streaming Webcast of the Public Workshop: This public workshop will 
also be Webcast. The Webcast link will be available on the workshop Web 
page after March 10, 2016. Please visit FDA's Medical Devices News & 
Events--Workshops & Conferences calendar at http://www.fda.gov/MedicalDevices/NewsEvents/WorkshopsConferences/default.htm. (Select 
this public workshop from the posted events list.) If you have never 
attended a Connect Pro event before, test your connection at https://collaboration.fda.gov/common/help/en/support/meeting_test.htm. To get a 
quick overview of the Connect Pro program, visit http://www.adobe.com/go/connectpro_overview. FDA has verified the Web site addresses, as of 
the date this document publishes in the Federal Register, but Web sites 
are subject to change over time.
    Transcripts: Please be advised that as soon as a transcript is 
available, it will be accessible at http://www.regulations.gov. It may 
be viewed at the Division of Dockets Management (see ADDRESSES). A 
transcript will also be available in either hardcopy or on CD-ROM, 
after submission of a Freedom of Information request. The Freedom of 
Information office address is available on the Agency's Web site at 
http://www.fda.gov. A link to the transcripts will also be available 
approximately 45 days after the public workshop on the Internet at 
http://www.fda.gov/MedicalDevices/NewsEvents/WorkshopsConferences/default.htm. (Select this public workshop from the posted events list).

    Dated: February 9, 2016.
Leslie Kux,
Associate Commissioner for Policy.
[FR Doc. 2016-03153 Filed 2-16-16; 8:45 am]