Standard Guide for Measuring Securement of Balloon Expandable Vascular Stent Mounted on Delivery System

SIGNIFICANCE AND USE
4.1 The securement of the endovascular stent on the balloon is a critical parameter to ensure that the stent is safely delivered to or from the treatment site.  
4.2 This guide is intended for use by researchers and manufacturers for the development and selection of pre-test treatments, tests and test endpoints to measure stent securement (displacement distances and dislodgment forces).  
4.3 This guide may be used to investigate which practical combinations of in vitro tests best characterize clinical scenarios.  
4.4 This guide should be used with discretion in choosing securement tests and evaluating results due to the myriad possible combinations of clinical conditions, failure modes, and stent delivery system designs.  
4.5 This guide may be of use for developing a test for meeting parts 2 and 3 of the requirements of EN 14299, Section 7.3.4.4 on Trackability.  
4.6 This guide may be of use for developing a test to meet section VII-C-8 of CDRH Guidance document.
SCOPE
1.1 This guide provides guidance for the design and development of pre-test treatments, tests, and test endpoints to measure stent securement of pre-mounted, unsheathed, balloon-expandable stent delivery systems. This guide is intended to aid investigators in the design, development, and in vitro characterization of pre-mounted, unsheathed, balloon-expandable stent delivery systems.  
1.2 This guide covers the laboratory determination of the shear force required to displace or dislodge a balloon-expandable endovascular stent mounted on a delivery system. The guide proposes a set of options to consider when testing stent securement. The options cover pre-test treatments, possible stent securement tests, and relevant test endpoints. An example test apparatus is given in 7.1.  
1.3 This guide covers in vitro bench testing characterization only. Measured levels of securement and product design/process differentiation may be particularly influenced by selections of pre-test treatments, securement test type (for example, stent gripping method), and test endpoint. In vivo characteristics may also differ from in vitro results.  
1.4 This guide does not cover all possible pre-test treatments, stent securement tests, or test endpoints. It is intended to provide a starting point from which to select and investigate securement test options.  
1.5 This guide does not specify a method for mounting the stent onto the delivery system.  
1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use.

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ASTM F2394-07(2013) - Standard Guide for Measuring Securement of Balloon Expandable Vascular Stent Mounted on Delivery System
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: F2394 − 07 (Reapproved 2013)
Standard Guide for
Measuring Securement of Balloon Expandable Vascular
1
Stent Mounted on Delivery System
This standard is issued under the fixed designation F2394; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.7 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This guide provides guidance for the design and devel-
responsibility of the user of this standard to establish appro-
opment of pre-test treatments, tests, and test endpoints to
priate safety and health practices and determine the applica-
measure stent securement of pre-mounted, unsheathed,
bility of regulatory requirements prior to use.
balloon-expandable stent delivery systems. This guide is in-
tended to aid investigators in the design, development, and in
2. Referenced Documents
vitro characterization of pre-mounted, unsheathed, balloon-
2
2.1 ASTM Standards:
expandable stent delivery systems.
E1169 Practice for Conducting Ruggedness Tests
1.2 This guide covers the laboratory determination of the
E1488 GuideforStatisticalProcedurestoUseinDeveloping
shear force required to displace or dislodge a balloon-
and Applying Test Methods
expandable endovascular stent mounted on a delivery system.
2.2 Other Documents:
The guide proposes a set of options to consider when testing
ISO 10555-1 Sterile Sterile Sterile, Single-use Intravascular
3
stent securement. The options cover pre-test treatments, pos-
Catheters—Part 1: General Requirements
sible stent securement tests, and relevant test endpoints. An
Quality System Regulation, Part VII Dept. Health and Hu-
example test apparatus is given in 7.1.
man Services, Food and Drug Administration, 21 CFR
Part 820 Medical Devices; Current Good Manufacturing
1.3 This guide covers in vitro bench testing characterization
4
Practice; Final Rule. Federal Register, October 7, 1996
only. Measured levels of securement and product design/
EN 14299 Non Active Surgical Implants—Particular Re-
process differentiation may be particularly influenced by selec-
quirements for Cardiac and Vascular Implants—Specific
tions of pre-test treatments, securement test type (for example,
5
Requirements For Arterial Stents, May 2004
stent gripping method), and test endpoint. In vivo characteris-
CDRH Guidance, Non-Clinical Tests and Recommended
tics may also differ from in vitro results.
Labeling for Intravascular Stents andAssociated Delivery
1.4 This guide does not cover all possible pre-test 6
Systems, January 13, 2005
treatments, stent securement tests, or test endpoints. It is
7
MAUDE Database
intended to provide a starting point from which to select and
investigate securement test options.
3. Terminology
1.5 This guide does not specify a method for mounting the
3.1 Definitions:
stent onto the delivery system.
3.1.1 balloon expandable stent, n—a stent that is expanded
at the treatment site by a balloon catheter. The stent material is
1.6 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
2
each system may not be exact equivalents; therefore, each
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
system shall be used independently of the other. Combining
Standards volume information, refer to the standard’s Document Summary page on
values from the two systems may result in non-conformance
the ASTM website.
with the standard.
3
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org.
4
AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
1
This guide is under the jurisdiction of ASTM Committee F04 on Medical and www.access.gpo.gov.
5
Surgical Materials and Devices and is the direct responsibility of Subcommittee Available from British Standards Institute (BSI), 389 Chiswick High Rd.,
F04.30 on Cardiovascular Standards. London W4 4AL, U.K., http://www.bsi-global.com.
6
Current edition approved March 1, 2013. Published March 2013. Originally Available from Food and Drug Administration (FDA), 5600 Fishers Ln.,
approved in 2004. Last previous edition approved in 2007 as F2394 – 07. DOI: Rockville, MD 20857,. Http://www.fda.gov/cdrh/ode/guidance/1545.pdf.
7
10.1520/F2394-07R13. Http://www.fda.gov/cdrh/maude.html.
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