EXHIBIT 99.2 NOTICE OF GUARANTEED DELIVERY TO TENDER UNREGISTERED 11% SENIOR SUBORDINATED NOTES DUE 2008 (INCLUDING THOSE IN BOOK-ENTRY FORM) OF MEDIQ/PRN LIFE SUPPORT SERVICES, INC. PURSUANT TO THE EXCHANGE OFFER AND PROSPECTUS DATED , 1998 As set forth in the Prospectus (as defined below), this form or one substantially equivalent hereto must be used to accept the Exchange Offer (as defined below) if certificates for unregistered 11% Senior Subordinated Notes due 2008 (the "Old Notes") of MEDIQ/PRN Life Support Services, Inc. are not immediately available or time will not permit a holder's Old Notes or other required documents to reach the Exchange Agent (as defined below) on or prior to the Expiration Date (as defined below), or the procedure for book-entry transfer cannot be completed on a timely basis. This form may be delivered by facsimile transmission, by registered or certified mail, by hand, or by overnight delivery service to the Exchange Agent. See "THE EXCHANGE OFFERS--Procedures for Tendering" in the Prospectus. THE EXCHANGE OFFER FOR THE OLD NOTES (THE "EXCHANGE OFFER") AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON , 1998 (THE "EXPIRATION DATE"), UNLESS THE EXCHANGE OFFER IS EXTENDED BY THE COMPANY. THE EXCHANGE AGENT FOR THE EXCHANGE OFFER IS: UNITED STATES TRUST COMPANY OF NEW YORK BY OVERNIGHT COURIER AND BY HAND UP TO 4:30 PM: BY REGISTERED OR CERTIFIED MAIL: BY HAND AFTER 4:30 PM ON THE EXPIRATION DATE ONLY: United States Trust Company United States Trust Company United States Trust Company of New York of New York of New York 770 Broadway, 13th Floor 111 Broadway P.O. Box 844 New York, New York 10003 Lower Level Cooper Station Attn: Corporate Trust Services New York, New York 10006 New York, New York 10276-0844 Attn: Corporate Trust Services Attn: Corporate Trust Services Telephone: (800) 548-6565 Facsimile: (212) 780-0592 (212) 420-6211 (Originals of all documents sent by facsimile should be sent promptly by registered or certified mail, by hand, or by overnight delivery service.) DELIVERY OF THIS NOTICE TO AN ADDRESS OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY. Ladies and Gentlemen: The undersigned hereby tenders to MEDIQ/PRN Life Support Services, Inc., a Delaware corporation (the "Company"), in accordance with the Company's offer, upon the terms and subject to the conditions set forth in the Prospectus dated , 1998 (the "Prospectus"), and in the accompanying Letter of Transmittal, receipt of which is hereby acknowledged, $ in aggregate principal amount of the Old Notes pursuant to the guaranteed delivery procedures described in the Prospectus. Name(s) of Registered Holder(s): ________________________________________________________________________________ (Please Type or Print) Address: _______________________________________________________________________ ________________________________________________________________________________ Area Code & Telephone No.: _____________________________________________________ Certificate Number(s) for Old Notes (if available): ______________________________________________________ Total Principal Amount Tendered and Represented by Certificate(s): $ ___________________________________________________________ Signature of Registered Holder(s): _____________________________________________ Dated: _________________________________________________________________________ / / The Depository Trust Company (Check if Old Notes will be tendered by book-entry transfer) Account Number: ________________________________________________________________ THE GUARANTEE BELOW MUST BE COMPLETED GUARANTEE (NOT TO BE USED FOR SIGNATURE GUARANTEE) The undersigned, being a member of or participant in the Securities Transfer Agents Medallion Program, the New York Stock Exchange Medallion Signature Program or the Stock Exchange Medallion Program or an "eligible guarantor institution" within the meaning of Rule 17Ad-15 under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), hereby guarantees (a) that the above named person(s) "own(s)" the Old Notes tendered hereby within the meaning of Rule 14e-4 under the Exchange Act ("Rule 14e-4"), (b) that such tender of such Old Notes complies with Rule 14e-4 and (c) to deliver to the Exchange Agent the certificates representing the Old Notes tendered hereby or confirmation of book-entry transfer of such Old Notes into the Exchange Agent's account at The Depository Trust Company, in proper form for transfer, together with a Letter of Transmittal (or facsimile thereof), properly completed and duly executed, with any required signature guarantees and any other required documents, within three New York Stock Exchange trading days after the earlier of (i) the date of execution hereof and (ii) the Expiration Date. Name of Firm: __________________________________________________________________ Address: _______________________________________________________________________ ________________________________________________________________________________ Area Code & Telephone No.: _____________________________________________________ Authorized Signature ___________________________________________________________ Name: __________________________________________________________________________ Title: _________________________________________________________________________ Dated: _________________________________________________________________________ NOTE: DO NOT SEND CERTIFICATES OF OLD NOTES WITH THIS FORM. CERTIFICATES OF OLD NOTES SHOULD BE SENT ONLY WITH A PROPERLY COMPLETED AND DULY EXECUTED LETTER OF TRANSMITTAL.