<SUBMISSION>
<ACCESSION-NUMBER>0001181431-06-054285
<TYPE>3
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20060920
<FILING-DATE>20060922
<DATE-OF-FILING-DATE-CHANGE>20060922
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Dubroc Darrell J
<CIK>0001186046
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>000-21982
<FILM-NUMBER>061104510
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>3182536432
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>PINEVILLE GENERAL OFFICE
<STREET2>2030 DONAHUE FERRY RD PO BOX 5000
<CITY>PINEVILLE
<STATE>LA
<ZIP>71361-5000
</MAIL-ADDRESS>
<FORMER-NAME>
<FORMER-CONFORMED-NAME>DUBROC DARRELL J SR
<DATE-CHANGED>20020905
</FORMER-NAME>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>DIAMETRICS MEDICAL INC
<CIK>0000895380
<ASSIGNED-SIC>3845
<IRS-NUMBER>411663185
<STATE-OF-INCORPORATION>MN
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>2658 PATTON RD
<CITY>ROSEVILLE
<STATE>MN
<ZIP>55113
<PHONE>6516398035
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>2658 PATTON ROAD
<CITY>ROSEVILLE
<STATE>MN
<ZIP>55113
</MAIL-ADDRESS>
</ISSUER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>rrd131113.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2006-09-20</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000895380</issuerCik>
        <issuerName>DIAMETRICS MEDICAL INC</issuerName>
        <issuerTradingSymbol>DMMC.OB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001186046</rptOwnerCik>
            <rptOwnerName>Dubroc Darrell J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>6245 BRISTOL PARKWAY #263</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CULVER CITY</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90230</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Pres &amp; Chief Operating Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Series K Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>6978630</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The Series K Convertible Preferred Stock is automatically convertible upon the first to occur of (i) an Amendment to the Issuer's Amended and Restated Articles of Incorporation or (ii) the merger of the Issuer into a Delaware corporation.</footnote>
        <footnote id="F2">The Series K Convertible Preferred Stock has no expiration date.</footnote>
        <footnote id="F3">Each share of Series K Convertible Preferred Stock is convertible into 2,583.7209 shares of Common Stock.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Darrell Dubroc</signatureName>
        <signatureDate>2006-09-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
