JOINDER AGREEMENT

Exhibit 4.5

JOINDER AGREEMENT

THIS JOINDER AGREEMENT, dated as of May 31, 2007 (this “Joinder Agreement”), is among Universal Hospital Services, Inc. (the “Company”) and Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated, Bear, Xxxxxxx & Co. Inc. and Wachovia Capital Markets, LLC.

Reference is hereby made to the Registration Rights Agreement, dated May 31, 2007 among UHS Merger Sub, Inc. (the “Issuer”) and Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated, Bear, Xxxxxxx & Co. Inc. and Wachovia Capital Markets, LLC (the “Registration Rights Agreement”). Terms used and not otherwise defined herein shall have the meanings given to them in the Registration Rights Agreement.

The Company hereby unconditionally and irrevocably expressly assumes and confirms, and agrees to perform and observe, each and any of the covenants, agreements, terms, conditions, obligations, appointments, duties, promises and liabilities of “the Issuer” under the Registration Rights Agreement as if the Company were an original signatory to the Registration Rights Agreement as of the date thereof.

The undersigned hereby agrees to promptly execute and deliver any and all further documents and take such further action as any other undersigned party may reasonably require to effect the purpose of this Joinder Agreement.

THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

[Signature page follows]

Dated: May 31, 2007
	UNIVERSAL HOSPITAL SERVICES, INC.
	By:	/s/ Xxx X. Xxxxxxxxx
		Name: Xxx X. Xxxxxxxxx
		Title:   Executive Vice President and
		Chief Financial Officer
	XXXXXXX LYNCH, PIERCE, XXXXXX & XXXXX INCORPORATED
	BEAR, XXXXXXX & CO. INC.
	WACHOVIA CAPITAL MARKETS, LLC
		Acting on behalf of themselves
		and as the Representatives
		of the Initial Purchasers
	By:	XXXXXXX LYNCH, PIERCE, XXXXXX & XXXXX INCORPORATED
	By:	/s/ Xxxxxx Xxxxxxx
		Name: Xxxxxx Xxxxxxx
		Title: Managing Director