Cytori Therapeutics, Inc.

(Name of Issuer)

Common Stock, $0.001 par value

(Title of Class of Securities)

23283K105

(CUSIP Number)

December 31, 2007

(Date of Event Which Requires Filing of this Statement)

  CUSIP No. 23283K105

  Page 2 of 6 Pages

  1

NAMES OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Medtronic, Inc. (41-0793183)

  2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)** 
**Joint Filing

(a) [  ]
(b) [  ]

  3

SEC USE ONLY

  4

CITIZENSHIP OR PLACE OF ORGANIZATION

Minnesota

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH

5

SOLE VOTING POWER

0

6

SHARED VOTING POWER

0

7

SOLE DISPOSITIVE POWER

0

8

SHARED DISPOSITIVE POWER

0

  9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

0

  10

CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

[  ]

  11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

0%

  12

TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

CO

 CUSIP No. 23283K105

  Page 3 of 6 Pages

  1

NAMES OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Medtronic International, Ltd. (41-1278948)

  2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)** 
**Joint Filing

(a) [  ]
(b) [  ]

  3

SEC USE ONLY

  4

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH

5

SOLE VOTING POWER

0

6

SHARED VOTING POWER

0

7

SOLE DISPOSITIVE POWER

0

8

SHARED DISPOSITIVE POWER

0

  9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

0

  10

CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

[  ]

  11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

0%

  12

TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

CO

Item 1(a)

Name of Issuer:

Cytori Therapeutics, Inc.

Item 1(b)

Address of Issuer’s Principal Executive Offices:

3020 Callan Road, San Diego, California, 92121

Item 2(a)

Name of Person Filing:

See Cover Pages, Item 1

Item 2(b)

Address of Principal Business Office or, if none, residence:

710 Medtronic, Minneapolis, Minnesota, 55432-4604

Item 2(c)

Citizenship:

See Cover Pages, Item 4

Item 2(d)

Title of Class of Securities:

Common Stock, $0.001 par value

Item 2(e)

CUSIP No.:

See Cover Pages

Item 3

If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b) or (c), check whether the person filing is a:

(a)

[   ]

Broker or dealer registered under Section 15 of the Exchange Act.

(b)

[   ]

Bank as defined in Section 3(a)(6) of the Exchange Act.

(c)

[   ]

Insurance company as defined in Section 3(a)(19) of the Exchange Act.

(d)

[   ]

Investment company registered under Section 8 of the Investment Company Act.

(e)

[   ]

An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E).

(f)

[   ]

An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F).

(g)

[   ]

A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G).

(h)

[   ]

A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act.

(i)

[   ]

A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act.

(j)

[   ]

Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

Item 4

Ownership

See Cover Pages, Items 5 through 11

Item 5

Ownership of Five Percent or Less of a Class:

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [X].

Item 6

Ownership of More than Five Percent on Behalf of Another Person:

Not applicable

Item 7

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company:

Not applicable

Item 8

Identification and Classification of Members of the Group:

Not applicable

Item 9

Notice of Dissolution of Group:

Not applicable

Item 10

Certifications:

Not applicable

Exhibits

Joint Filing Agreement, dated January 10, 2008, between the Reporting Persons.

/s/ Keyna P. Skeffington

Keyna P. Skeffington, Vice President

Senior Legal Counsel and Assistant

Secretary

MEDTRONIC, INC.

BY:

/s/ Keyna P. Skeffington

Keyna P. Skeffington, Vice President

Senior Legal Counsel and Assistant Secretary

MEDTRONIC INTERNATIONAL, LTD.

BY:

/s/ Keyna P. Skeffington

Keyna P. Skeffington, Assistant Secretary