FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   Christoffersen Ralph E 2. Date of Event Requiring Statement (Month/Day/Year) 06/27/2006 3. Issuer Name and Ticker or Trading Symbol REPLIDYNE INC [RDYN] (Last) (First) (Middle) MORGENTHALER VENTURES, 4430 ARAPAHOE AVENUE, SUITE 220 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) BOULDER, CO 80303 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series A Preferred Stock	06/27/2006	  (1)	Common Stock	2,000,000	$ (1)	I	By Morgenthaler Partners VII, L.P. (2)
Series C Preferred Stock	06/27/2006	  (1)	Common Stock	6,400,000	$ (1)	I	By Morgenthaler Partners VII, L.P. (2)
Series D Preferred Stock	06/27/2006	  (1)	Common Stock	1,874,163	$ (1)	I	By Morgenthaler Partners VII, L.P. (2)
Warrant (right to buy)	06/27/2006	06/27/2011	Common Stock	80,001 (3)	$ 1.25 (3)	I	By Morgenthaler Partners VII, L.P. (2)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Christoffersen Ralph E MORGENTHALER VENTURES 4430 ARAPAHOE AVENUE, SUITE 220 BOULDER, CO 80303	  X	Â	Â	Â

Signatures

/s/ Ralph E. Christoffersen		06/27/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The Issuer's preferred stock will automatically be converted into Common Stock upon the closing of the Issuer's initial public offering. The number of shares does not reflect the automatic conversion of each share of Series A, C and D Preferred Stock into 0.20391517 shares of Common Stock upon the closing of the initial public offering.
(2)	The Reporting Person is a member of Morgenthaler Management Partners VII, LLC, the managing general partner of Morgenthaler Partners VII, L.P. As such, the Reporting Person shares voting and investment power over the shares held by Morgenthaler Partners VII, L.P. and may be deemed to have indirect beneficial ownership of such shares. The Reporting Person disclaims beneficial ownership of such shares held by Morgenthaler Partners VII, L.P. except to his proportionate pecuniary interest therein.
(3)	The warrants to purchase shares of Series C Preferred Stock will automatically be converted into warrants to purchase shares of Common Stock upon the closing of the Issuer's initial public offering. The number of shares and exercise price do not reflect the automatic conversion of each share of Series C Preferred Stock into 0.20391517 shares of Common Stock upon the closing of the initial public offering

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