K Number
K031578
Device Name
MICRUS MICROCOIL SYSTEMS, MODELS HEL, SPH, STR, FSR AND HSR
Manufacturer
Date Cleared
2003-08-01

(73 days)

Product Code
Regulation Number
882.5950
AI/MLSaMDIVD (In Vitro Diagnostic)TherapeuticDiagnosticis PCCP Authorized
Intended Use
Micrus MicroCoil Systems are intended for endovascular embolization of intracranial aneurysms.
Device Description
Micrus MicroCoil Systems are platinum embolic coils ("MicroCoils") attached to Device Positioning Units (DPUs (single use, sterile). The Micrus MicroCoil Systems are available in a 10-System size (compatible with 10 and 14 sized microcatheters) and 18-System size (compatible with 14 and 18 sized microcatheters). Both 10 and 18 sizes are available in various diameters/dimensions. Shapes can be spherical, helical, or straight. Lengths range from 1 to 30 centimeters and diameters range from 2 to 20 millimeters. Implant material for the non stretch resistant MicroCoils is a platinum alloy: implant material for the stretch resistant MicroCoils is a platinum alloy and a stretch resistant member (non-absorbable polypropylene suture). A MicroCoil is detached from its Device Positioning Unit through heat shearing of a highly oriented, high tensile strength polyethylene (PE) fiber upon the clinician's command. The Device Positioning Unit is then removed from the microcatheter and discarded. A Micrus MicroCoil System connects to a Micrus Connecting Cable (single use, sterile) which traverses the sterile field to connect to a Micrus Detachment Control Box (DCB) (reusable, non-sterile). The Connecting Cable and Detachment Control Box are sold separately. A MicroCoil System plus Connecting Cable and Detachment Control Box is referred to as a Micrus MicroCoil Delivery System.
More Information

No
The device description focuses on the physical components and detachment mechanism of embolic coils, with no mention of AI or ML for image analysis, treatment planning, or any other function. The performance study is a clinical trial comparing outcomes of different treatment methods, not evaluating an AI/ML algorithm.

Yes
The device is intended for endovascular embolization of intracranial aneurysms, which is a medical treatment.

No

Explanation: The device is an embolic coil system designed for the "endovascular embolization of intracranial aneurysms," which is a treatment procedure, not a diagnostic one.

No

The device description clearly details physical components such as platinum embolic coils, Device Positioning Units, a Connecting Cable, and a Detachment Control Box, indicating it is a hardware-based medical device.

Based on the provided text, this device is not an IVD (In Vitro Diagnostic).

Here's why:

  • Intended Use: The intended use is "endovascular embolization of intracranial aneurysms." This describes a therapeutic procedure performed within the body to treat a medical condition.
  • Device Description: The device is a physical implant (platinum embolic coils) and associated delivery system components used to deliver the implant.
  • Lack of In Vitro Activity: There is no mention of the device being used to examine specimens (like blood, urine, tissue) outside of the body to provide diagnostic information.

IVD devices are used to perform tests on samples taken from the human body to diagnose diseases or other conditions. This device is a therapeutic device used to treat a condition directly within the body.

N/A

Intended Use / Indications for Use

Micrus MicroCoil Systems are intended for endovascular embolization of intracranial aneurysms.

Product codes

HCG

Device Description

Micrus MicroCoil Systems are platinum embolic coils ("MicroCoils") attached to Device Positioning Units (DPUs (single use, sterile). The Micrus MicroCoil Systems are available in a 10-System size (compatible with 10 and 14 sized microcatheters) and 18-System size (compatible with 14 and 18 sized microcatheters). Both 10 and 18 sizes are available in various diameters/dimensions. Shapes can be spherical, helical, or straight. Lengths range from 1 to 30 centimeters and diameters range from 2 to 20 millimeters. Implant material for the non stretch resistant MicroCoils is a platinum alloy: implant material for the stretch resistant MicroCoils is a platinum alloy and a stretch resistant member (non-absorbable polypropylene suture).

A MicroCoil is detached from its Device Positioning Unit through heat shearing of a highly oriented, high tensile strength polyethylene (PE) fiber upon the clinician's command. The Device Positioning Unit is then removed from the microcatheter and discarded.

A Micrus MicroCoil System connects to a Micrus Connecting Cable (single use, sterile) which traverses the sterile field to connect to a Micrus Detachment Control Box (DCB) (reusable, non-sterile). The Connecting Cable and Detachment Control Box are sold separately. A MicroCoil System plus Connecting Cable and Detachment Control Box is referred to as a Micrus MicroCoil Delivery System.

Mentions image processing

Not Found

Mentions AI, DNN, or ML

Not Found

Input Imaging Modality

Not Found

Anatomical Site

Intracranial (aneurysms)

Indicated Patient Age Range

Not Found

Intended User / Care Setting

Clinician; not specified (reusable, non-sterile: Detachment Control Box used outside the sterile field)

Description of the training set, sample size, data source, and annotation protocol

Not Found

Description of the test set, sample size, data source, and annotation protocol

Not Found

Summary of Performance Studies

The non-clinical tests performed on the Micrus MicroCoil System were reviewed in 510k numbers K002056 and K022420. A summary of non-clinical tests and results are supplied here as a reference.

Study Type: Aneurysm Packing / Detachment Reliability
Sample Size: Not specified
Key Results:

  • Complete occlusion of aneurysms.
  • No filling defects evident on angio.
  • No premature detachment / auto-detach caused by exposure to blood, body fluids, body temperatures or repeated manipulation. 100% first detach-cycle detachment achieved.

Study Type: Coil Stability Aneurysm Occlusion
Sample Size: Not specified
Key Results: Positional stability and aneurysm occlusion maintained through 6 months of implant. No coil compaction present at 6-month angio.

Study Type: GDC Bench Marking
Sample Size: Not specified
Key Results: Showed substantial equivalence in delivery force, tensile, and stiffness.

Study Type: Coil Stiffness/Softness
Sample Size: Not specified
Key Results: Finishing Stretch Resistant MicroCoil and Helical Stretch Resistant MicroCoil stiffness is within desired stiffness limit.

Study Type: Friction in the Microcatheter (Delivery Force)
Sample Size: Not specified
Key Results: Finishing Stretch Resistant MicroCoil and Helical Stretch Resistant MicroCoil average push force exhibit comparable delivery forces.

Study Type: MDR Database Review
Sample Size: Not specified
Key Results: MSR01 risk assessment includes and addresses all risks encountered in review of predicate device MDR review.

Study Type: Biocompatibility of Materials
Sample Size: Not specified
Key Results: The only new material in the Micrus Stretch Resistant MicroCoil is polypropylene monofilament # 6523. It is identical to the pre-approved GDC stretch resistant suture.

Study Type: Sterilization Validation
Sample Size: Not specified
Key Results: Passed minimum sterility assurance level of 10-6.

Study Type: Shelf Life Test
Sample Size: Not specified
Key Results: Minimum tensile strength after 1 year accelerated aging shows no degradation.

Study Type: Tensile Strength
Sample Size: Not specified
Key Results: Tensile strength meets desired strength criteria.

Study Type: Durability (Reliability after Fatigue)
Sample Size: Not specified
Key Results: No knotting, no breakage, no stretching occurred. Durability meets desired durability criteria.

Study Type: MRI Compatibility of Implant
Sample Size: Not specified
Key Results: No change was made which would impact MRI compatibility.

Clinical Trial: International Subarachnoid Aneurysm Trial (ISAT)
Sample Size: 2143 patients (randomly assigned to neurosurgical clipping (n = 1070) or endovascular treatment with platinum coils (n = 1073)).
Key Results:

  • 23.7% of endovascular patients were dependant or dead at 1 year.
  • 30.6% of surgical patients were dependant or dead at 1 year.
  • The relative risk reduction for endovascular patients (versus surgical) was 22.6%.
  • The absolute risk reduction for endovascular patients (versus surgical) was 6.9%.
  • The risk of rebleeding at 1 year for the endovascular patients was 2 per 1276.
  • The risk of rebleeding at 1 year for the surgical patients was 0 per 1081.
    Interpretation:
  • The outcome in terms of survival, free of disability at 1 year, is significantly better with endovascular coiling.
  • Long-term risks of further bleeding are low from either therapy, although slightly more frequent with endovascular coiling.

Key Metrics

Not Found

Predicate Device(s)

K002056, K022420

Reference Device(s)

Not Found

Predetermined Change Control Plan (PCCP) - All Relevant Information

Not Found

§ 882.5950 Neurovascular embolization device.

(a)
Identification. A neurovascular embolization device is an intravascular implant intended to permanently occlude blood flow to cerebral aneurysms and cerebral ateriovenous malformations. This does not include cyanoacrylates and other embolic agents, which act by polymerization or precipitation. Embolization devices used in other vascular applications are also not included in this classification, see § 870.3300.(b)
Classification. Class II (special controls.) The special control for this device is the FDA guidance document entitled “Class II Special Controls Guidance Document: Vascular and Neurovascular Embolization Devices.” For availability of this guidance document, see § 882.1(e).

0

K031578

Safety and Effectiveness Summary II.

A. Contact Information

Margaret Webber Director, Regulatory and Clinical Affairs Micrus Corporation 610 Palomar Avenue Sunnyvale, CA 94085

Device Name B.

Micrus MicroCoil System Classification: Device, Artificial Embolization Regulation Number: 882.5950 Product Code: HCG Device Class: III

C. Predicate Device(s)

This 510k application is for a labeling change to the FDA cleared Micrus MicroCoil Systems listed in the table below:

NumberDescriptionClearance Date
K002056Micrus MicroCoil Delivery System01/11/2001
K022420Micrus Stretch Resistant MicroCoil System10/22/2002

Device Description: Unchanged from predicates listed above. D.

Micrus MicroCoil Systems are platinum embolic coils ("MicroCoils") attached to Device Positioning Units (DPUs (single use, sterile). The Micrus MicroCoil Systems are available in a 10-System size (compatible with 10 and 14 sized microcatheters) and 18-System size (compatible with 14 and 18 sized microcatheters). Both 10 and 18 sizes are available in various diameters/dimensions. Shapes can be spherical, helical, or straight. Lengths range from 1 to 30 centimeters and diameters range from 2 to 20 millimeters. Implant material for the non stretch resistant MicroCoils is a platinum alloy: implant material for the stretch resistant MicroCoils is a platinum alloy and a stretch resistant member (non-absorbable polypropylene suture).

A MicroCoil is detached from its Device Positioning Unit through heat shearing of a highly oriented, high tensile strength polyethylene (PE) fiber upon the clinician's command. The Device Positioning Unit is then removed from the microcatheter and discarded.

A Micrus MicroCoil System connects to a Micrus Connecting Cable (single use, sterile) which traverses the sterile field to connect to a Micrus Detachment Control Box (DCB) (reusable, non-sterile). The Connecting Cable and Detachment Control Box are sold separately. A MicroCoil System plus Connecting Cable and Detachment Control Box is referred to as a Micrus MicroCoil Delivery System.

1

Intended Use (Indication for Use Statement) E.

Micrus MicroCoil Systems are intended for endovascular embolization of intracranial aneurysms.

Technological Comparison F.

There is no change in the technology from that of 510k numbers K002056 and K022420. The Micrus MicroCoil System remains the same. The only change is the Indication for Use (to be justified in the Section I, "Justification for Labeling Change Based Upon Clinical Outcomes of ISAT"

MicroCoil System (Unchanged)
CharacteristicMicrus MicroCoil System PredicateCurrent Application
MicroCoilSterile, single use.Same as predicate
SystemMicroCoil attached to DPU.Same as predicate
supplied as:Polyethylene introducer over coil.Same as predicate
In plastic package hoop.Same as predicate
Implantable Embolic Coil (Unchanged)
CharacteristicMicrus MicroCoil System PredicateCurrent Application
Materials of
ConstructionPlatinum/Tungsten alloy wire &
Au/Sn solderSame as predicate
ShapeSpherical, helical, & straightSame as predicate
DimensionsVarious diameters & lengths to treat
a variety of aneurysm sizesSame as predicate
RadiopacityRadiopaque from Pt alloy wireSame as predicate
MRI
CompatibilityYesSame as predicate
Method of
Attachment to
Device
Positioning
UnitHigh tensile strength, highly
oriented polyethylene fiberSame as predicate
Method of
Detachment
from Device
Positioning
UnitShear polyethylene fiber with a loop
of resistively heated coilSame as predicate
Provided:Sterile, single useSame as predicate

2

Device Positioning Unit (Unchanged)
CharacteristicMicrus MicroCoil System PredicateCurrent Application
PhysicalVariable stiffness.
Composite introducer.
Most flexible distally, medium
flexibility in mid-section and stiffest
proximally to allow pushing of the
embolic coil through the tortuous
cerebral vasculature.Same as predicate
ConstructionStainless steel hypotube (proximal),
stainless steel braid (mid) and
polymer (distal) sheathing for 2
conduction wires and distal RH coil.Same as predicate
Working
Length175 cmSame as predicate
Package
ConfigurationIn plastic packaging hoop.
Introducer in place (for introduction
of MicroCoil into the microcatheter).Same as predicate
Compatible
with:Microcatheters with minimum 0.14"
i.d. ("10" sized systems), or 0.16"
i.d. ("18" sized systems).
2 radiopaque tip markers 3 cm apart
(examples: Tracker 10, Tracker 18,
Excel 14, Prowler 10, Prowler 14).Same as predicate
Connecting Cable (Unchanged)
CharacteristicMicrus MicroCoil Delivery System
PredicateCurrent Application
How supplied:Sterile, single useSame as predicate
PhysicalSingle cable with proprietary
connectors to fit only the Micrus
Detachment Control Box and the
Micrus MicroCoil SystemSame as predicate
Length262 cm.Same as predicate

3

Detachment Control Box (Unchanged)
CharacteristicMicrus MicroCoil Delivery System
PredicateCurrent Application
How suppliedNon-Sterile, reusable.
Used outside the sterile field.Same as predicate
Power SourceAlkaline batteries.Same as predicate
DisplaysVoltage, Current, Low Battery,
Fault, Detach CycleSame as predicate
Detachment
Cycle
Duration5 secondsSame as predicate
Output
Voltage6.5 VDCSame as predicate
Output
Current125 mA nominal, 200 mA max.Same as predicate
"Detach"
feedback"Detach Cycle" light goes from
illuminated to off. Also, a beep
sounds once a second for 5 seconds
to provide an audible countdown of
the 5 second detachment time.
Clinician verifies detachment
fluoroscopically per device labeling.Same as predicate
Method to
attach
Connecting
Cable to
Detachment
BoxProprietary connector; fits only one-
way to assure proper polarity.Same as predicate
Flow of
CurrentFrom positive terminal, through
positive lead in connecting cable,
through positive conductor of DPU,
through resistance heating coil,
through negative conductor of DPU,
through negative lead in connecting
cable, back to negative terminal of
detachment control box.Same as predicate

4

Accessories (Unchanged)
CharacteristicMicrus MicroCoil System
PredicateCurrent
Application
Accessory
Products Required
to Perform the
Procedure.Micrus Sterile Connecting CableSame as predicate
Micrus Detachment Control BoxSame as predicate
5-7F Guide Catheter*Same as predicate
Microcatheter (see above)*Same as predicate
Guide wire compatible with microcatheter*Same as predicate
Continuous saline/heparin saline flush*Same as predicate
* - Not provided as
part of the system,
chosen based upon
physician
experience and
preference.Rotating haemostatic valves*Same as predicate
3-Way stopcock*Same as predicate
1-Way valve*Same as predicate
IV pole*Same as predicate
Femoral Sheath*Same as predicate
Alkaline Batteries*Same as predicate

This technological comparison demonstrates the Micrus MicroCoil Delivery System remains equivalent to 510k numbers K002056 and K022420

Discussion of Non Clinical Tests and Conclusions (Unchanged) G.

The non-clinical tests performed on the Micrus MicroCoil System were reviewed in 510k numbers K002056 and K022420. A summary of non-clinical tests and results are supplied here as a reference.

| Test | Results (Unchanged) | Substantial
Equivalence |
|------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------|
| Aneurysm Packing /
Detachment
Reliability | Characteristic:
■ Complete occlusion of
aneurysms.
■ Detachment Reliability.
Test data:
■ No filling defects evident on
angio.
■ No premature detachment /
auto-detach caused by
exposure to blood, body
fluids, body temperatures or
repeated manipulation. 100%
first detach-cycle detachment
achieved. | Equivalent |
| Coil Stability
Aneurysm Occlusion | Characteristic: Positional
stability and aneurysm
occlusion.
Test data: Positional stability and
aneurysm occlusion maintained
through 6 months of implant. No
coil compaction present at 6-
month angio. | Equivalent |
| GDC Bench
Marking | Characteristic: Established
specifications for delivery force,
tensile strength, and stiffness.
The Micrus Stretch Resistant
MicroCoil must be substantially
equivalent to predicates.
Test data: Showed substantial
equivalence in delivery force,
tensile, and stiffness. | Equivalent |
| Coil
Stiffness/Softness | Characteristic: Stiffness limit
desired for Finishing Stretch
Resistant MicroCoil.
Test data: Finishing Stretch
Resistant MicroCoil and Helical
Stretch Resistant MicroCoil
stiffness is within desired
stiffness limit. | Equivalent |
| Friction in the
Microcatheter
(Delivery Force) | Characteristic: Average push
force must be substantially
equivalent to predicates.
Test data: Finishing Stretch
Resistant MicroCoil and Helical
Stretch Resistant MicroCoil
average push force exhibit
comparable delivery forces. | Equivalent |
| MDR Database
Review | Characteristic: MDR review for
clinical risks.
Test data: MSR01 risk
assessment includes and
addresses all risks encountered
in review of predicate device
MDR review. | Equivalent |
| Biocompatibility of
Materials | Characteristics: Meets the
requirements of ISO 10993.
Test data: The only new material
in the Micrus Stretch Resistant | Equivalent |
| | MicroCoil is polypropylene
monofilament # 6523. It is
identical to the pre-approved
GDC stretch resistant suture. | |
| Sterilization
Validation | Characteristic: Minimum
Sterility Assurance Level of 10-6.
Test data: Passed minimum
sterility assurance level of 10-6. | Equivalent |
| Shelf Life Test | Characteristic: No performance
degradation after 1 year of shelf
life aging.
Test data: Minimum tensile
strength after 1 year accelerated
aging shows no degradation. | Equivalent |
| Tensile Strength | Characteristic: Tensile strength
of suture ball tip and MicroCoil
to DPU must be substantially
equivalent to predicates.
Test data: Tensile strength meets
desired strength criteria. | Equivalent |
| Durability
(Reliability after
Fatigue) | Characteristic: Withstand
deployment and retraction 6
times in a tortuous anatomy.
Test data: No knotting, no
breakage, no stretching occurred.
Durability meets desired
durability criteria. | Equivalent |
| MRI Compatibility
of Implant | No change was made which
would impact MRI
compatibility. | Equivalent |

5

K031578

6

Justification for Labeling Change of "Indication for Use" Statement H. Background

Endovascular coiling of intracranial aneurysms has been in clinical practice in Europe since 1992 and since 1995 in the U.S. Prior to the advent of safe, detachable coil systems, patients with intracranial aneurysms had only one option: craniotomy and clipping. In the past 10 years, coiling has gained acceptance world wide as a viable option to surgical clipping.

Initially, endovascular coiling was viewed as an alternative to be used only when surgery was ill advised due to an aneurysm's shape or location, or to a patient's poor condition. Therefore, initially it was appropriate to label coils as intended for use in cases where the surgery was deemed to be high risk or impossible.

7

K031578

Over the past 10 years many improvements have been made in endovascular techniques making coiling a superior option to surgery, as demonstrated in a recent multi-center study published in the Lancet. The purpose of the study was to compare outcomes of endovascular coiling to surgical clipping. Based upon the results of this study, in which MicroCoils were used (along with GDC and Cook coils) Micrus Corporation is requesting a change to its "Indication for Use" statement.

Micrus Corporation received CE Marking for the Micrus MicroCoil System in May 2000. followed by FDA market clearance in January 2001. After regulatory clearance, Micrus applied to the International Subarachnoid Aneurysm Trial Steering Committee for inclusion in their multi-center study. Permission was granted in February 2001. MicroCoils continued to be used in the study until study enrollment ended in June 2002.

Brief Overview of the International Subarachnoid Aneurysm Trial (ISAT)

Reason for the Study

ISAT was designed to establish the relative benefits of endovascular coiling versus surgical clipping for intracranial aneurysms in patients with ruptured intracranial aneurysms.

Methods

  • ISAT enrolled 2143 patients with ruptured intracranial aneurysms and randomly assigned them to neurosurgical clipping (n = 1070) or endovascular treatment with platinum coils (n = 1073).
  • · Clinical outcomes were assessed at 2 months and at 1 year.
  • The primary outcome was a neurological assessment of dependency at 1 year (using the Rankin neurological outcome scale).

Findings

  • 23.7% of endovascular patients were dependant or dead at 1 year.
  • 30.6% of surgical patients were dependant or dead at 1 year.
  • The relative risk reduction for endovascular patients (versus surgical) was 22.6%.
  • The absolute risk reduction for endovascular patients (versus surgical) was 6.9%.
  • The risk of rebleeding at 1 year for the endovascular patients was 2 per 1276.
  • The risk of rebleeding at 1 year for the surgical patients was 0 per 1081. Interpretation
  • The outcome in terms of survival, free of disability at 1 year, is significantly better with endovascular coiling.
  • Long-term risks of further bleeding are low from either therapy, although slightly more frequent with endovascular coiling.

Proposed Labeling Change to "Instruction for Use" pamphlet

Based upon the results of ISAT, Micrus Corporation proposes changing the current "Indication for Use" statement.

  • The proposed "Indication for Use" labeling is as follows:
    The ACT Platinum MicroCoil Systems are intended for endovascular embolization of intracranial aneurysms.

8

Kc31578

Summary of Safety and Effectiveness l.

Based upon the clinical trail results cited in the Lancet, it is concluded that the Micrus MicroCoil System (one of 3 platinum embolic coil systems used in this scientifically rigorous randomized trial) demonstrated treatment outcome is significantly better with endovascular coiling than with surgical clipping.

Margaret Webber Director, Regulatory & Clinical Affairs Micrus Corporation May 07, 2003

9

Image /page/9/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. Inside the circle is a stylized image of an eagle with its wings spread, symbolizing the department's mission to protect and promote the health and well-being of Americans.

Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850

AUG - 1 2003

Ms. Margaret Webber Director, Regulatory and Clinical Affairs Micrus Corporation 610 Palomar Avenue Sunnyvale, California 94085

Re: K031578

Trade/Device Name: Micrus MicroCoil Systems Regulation Number: 21 CFR 882.5950 Regulation Name: Artificial Embolization Device Regulatory Class: III Product Code: HCG Dated: May 7, 2003 Received: June 3, 2003

Dear Ms. Webber:

We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.

If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.

Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.

10

Page 2 - Ms. Margaret Webber

This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.

If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Office of Compliance at (301) 594-4659. Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97) you may obtain. Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address http://www.fda.gov/cdrh/dsma/dsmamain.html

Sincerely yours,

Miriam C. Provost

Celia M. Witten, Ph.D., M.D. Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

11

K 03/578

Device Name: Micrus MicroCoil Systems

510(k) Number (if known):

Indications for Use:

Micrus MicroCoil Systems are intended for endovascular embolization of intracranial aneurysms.

(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)

CONCURRENCE OF CDRH, OFFICE OF DEVICE EVALUATION (ODE)

Over the Counter Use: or Prescription Use: V (Per 21 CFR 801.109)

Muriam C. Provost

(Division Sign-Off) Division of General, Restorative and Neurological Devices

510(k) Number K031578

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