RNS Number:9801I
Spacelabs Healthcare Inc.
03 December 2007

TR-1: Notifications of Major Interests in Shares

HAWTHORNE, CA--(Marketwire - December 03, 2007) -

1. Identity of the issuer or the underlying issuer of existing shares to which
voting rights are attached:

     Spacelabs Healthcare, Inc. (LSE: SLAB)

2. Reason for notification (please place an X inside the appropriate bracket/s):

     An acquisition or disposal of voting rights: (X)

     An acquisition or disposal of financial instruments which may
     result in the acquisition of shares already issued to which
     voting rights are attached: ( )

     An event changing the breakdown of voting rights: ( )

     Other (please specify): ( )

     First notification under DTR Sourcebook: ( )

3. Full name of person(s) subject to notification obligation:

     OSI Systems, Inc.

4. Full name of shareholder(s) (if different from 3) :

     OSI Systems, Inc. (direct)
     OSI Optoelectronics, Inc. (indirect)

5. Date of transaction (and date on which the threshold is crossed or reached if
different):

     30 November 2007

6. Date on which issuer notified:

     30 November 2007

7. Threshold(s) that is/are crossed or reached:

     Ownership (direct and indirect) of 89% of voting rights

8. Notified Details:

A: Voting rights attached to shares

Class/type of shares            Situation previous to
if possible use                 the Triggering transaction

ISIN CODE                       
                       Number of shares       Number of voting Rights

Common                       57,485,830                    57,485,830


Resulting situation after the triggering transaction

Class/type of shares  Number of   Number of voting       % of voting rights
if possible use        shares      rights
ISIN CODE             Direct      Direct      Indirect   Direct    Indirect

Common                54,435,760  54,435,760  3,350,070   79.5%        4.9%


B: Financial Instruments

Resulting situation after the triggering transaction

Type of     Expiration   Exercise/conversion  No. of voting     % of voting
financial   date         period/date          rights that may   rights
instrument                                    be acquired (if
                                              the instrument
                                              exercised/
                                              converted)

Total (A+B)

Number of voting rights  % of voting rights

60,659,270               89%


9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable: See Section 4 above

Proxy Voting:

10. Name of proxy holder:

11. Number of voting rights proxy holder will cease to hold:

12. Date on which proxy holder will cease to hold voting rights:

13. Additional information: Figures are based on a total of 68,223,767 voting
rights

14. Contact name: Jeremy Norton

15. Contact telephone number: +1-310-349-2372

16. Contact at:

OSI Systems, Inc.
Attention: Jeremy Norton
12525 Chadron Ave.
Hawthorne, CA 90250
USA




OSI Systems, Inc.
Jeremy Norton
+1-310-349-2372
12525 Chadron Ave.
Hawthorne, CA 90250
USA




                      This information is provided by RNS
            The company news service from the London Stock Exchange

END
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