-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0000899140-03-000691.txt : 20030902
<SEC-HEADER>0000899140-03-000691.hdr.sgml : 20030901
<ACCEPTANCE-DATETIME>20030902190926
ACCESSION NUMBER:		0000899140-03-000691
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030829
FILED AS OF DATE:		20030902

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MICRO THERAPEUTICS INC
		CENTRAL INDEX KEY:			0000311407
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		IRS NUMBER:				330569235
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2 GOODYEAR
		CITY:			IRVINE
		STATE:			CA
		ZIP:			92618
		BUSINESS PHONE:		9498373700

	MAIL ADDRESS:	
		STREET 1:		2 GOODYEAR
		CITY:			IRVINE
		STATE:			CA
		ZIP:			92618

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VERTICAL FUND II LP
		CENTRAL INDEX KEY:			0001164878
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-06523
		FILM NUMBER:		03877338

	BUSINESS ADDRESS:	
		STREET 1:		25 DEFOREST AVENUE
		CITY:			SUMMIT
		STATE:			NJ
		ZIP:			07901
		BUSINESS PHONE:		9082773737

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VERTICAL FUND I LP
		CENTRAL INDEX KEY:			0001014478
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-06523
		FILM NUMBER:		03877339

	BUSINESS ADDRESS:	
		STREET 1:		18 BANK STREET
		CITY:			SUMMIT
		STATE:			NJ
		ZIP:			07901
		BUSINESS PHONE:		9082773737

	MAIL ADDRESS:	
		STREET 1:		25 DEFOREST AVENUE
		CITY:			SUMMIT
		STATE:			NJ
		ZIP:			07901

	FORMER NAME:	
		FORMER CONFORMED NAME:	VERTICAL FUND ASSOCIATES L P
		DATE OF NAME CHANGE:	19960514
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>vfiall_mti4-090203ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<!-- - EDGAR Ease Plus 1.0                                   07/25/03  TT    -->
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
   <periodOfReport>2003-08-29</periodOfReport>
   <notSubjectToSection16>1</notSubjectToSection16>
    <issuer>
        <issuerCik>0000311407</issuerCik>
        <issuerName>MICRO THERAPEUTICS INC</issuerName>
        <issuerTradingSymbol>MTIX</issuerTradingSymbol>
   </issuer>
   <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001014478</rptOwnerCik>
            <rptOwnerName>VERTICAL FUND I LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O THE VERTICAL GROUP, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>25 DEFOREST AVENUE</rptOwnerStreet2>
            <rptOwnerCity>SUMMIT</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07091</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
         <isDirector>0</isDirector>
         <isOfficer>0</isOfficer>
         <isTenPercentOwner>1</isTenPercentOwner>
         <isOther>0</isOther>
      </reportingOwnerRelationship>
   </reportingOwner>
   <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001164878</rptOwnerCik>
            <rptOwnerName>VERTICAL FUND II LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O THE VERTICAL GROUP, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>25 DEFOREST AVENUE</rptOwnerStreet2>
            <rptOwnerCity>SUMMIT</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07091</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
         <isDirector>0</isDirector>
         <isOfficer>0</isOfficer>
         <isTenPercentOwner>1</isTenPercentOwner>
         <isOther>0</isOther>
      </reportingOwnerRelationship>
   </reportingOwner>
 <nonDerivativeTable>
   <nonDerivativeTransaction>
      <securityTitle>
         <value>Common Stock, par value $0.001 per share</value>
      </securityTitle>
      <transactionDate>
         <value>2003-08-29</value>
      </transactionDate>
      <transactionCoding>
         <transactionFormType>4</transactionFormType>
         <transactionCode>J</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
            <footnoteId id="F1"/>
      </transactionCoding>
      <transactionAmounts>
         <transactionShares>
           <value>0</value>
            <footnoteId id="F2"/>
         </transactionShares>
         <transactionPricePerShare>
            <footnoteId id="F2"/>
         </transactionPricePerShare>
         <transactionAcquiredDisposedCode>
           <value>D</value>
            <footnoteId id="F2"/>
         </transactionAcquiredDisposedCode>
      </transactionAmounts>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>0</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
            <value>I</value>
            <footnoteId id="F2"/>
         </directOrIndirectOwnership>
         <natureOfOwnership>
            <value>N/A</value>
            <footnoteId id="F2"/>
         </natureOfOwnership>
      </ownershipNature>
   </nonDerivativeTransaction>
 </nonDerivativeTable>
   <footnotes>
      <footnote id="F1"> On August 29, 2003, each of Vertical Fund I, L.P., a Delaware limited partnership (&quot;VFI&quot;), and Vertical Fund II, L.P., a Delaware limited partnership (&quot;VFII&quot;), contributed their respective membership interests in Micro Investment, LLC, a Delaware limited liability company, to ev3 LLC, a Delaware limited liability company (&quot;ev3 LLC&quot;), in exchange for the issuance by ev3 LLC of Class A Preferred Membership Units. As a result of these contributions, neither VFI nor VFII is the beneficial owner of ten percent of the common stock of Micro Therapeutics, Inc.</footnote>

      <footnote id="F2"> Not applicable. See footnote (1) above.</footnote>
   </footnotes>
   <ownerSignature>
      <signatureName>/s/ Richard B. Emmitt</signatureName>
      <signatureDate>2003-09-02</signatureDate>
   </ownerSignature>
   <ownerSignature>
      <signatureName>/s/ Richard B. Emmitt</signatureName>
      <signatureDate>2003-09-02</signatureDate>
   </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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