Pump, especially for blood treatment

• US 8,545,197 B2
• Filed: 03/29/2006
• Issued: 10/01/2013
• Est. Priority Date: 03/30/2005
• Status: Active Grant

• Current Assignee: Integra Holdings LLC
• Original Assignee: Medical Service SRL
• Inventors: Caramuta, Canio
• Primary Examiner(s): Bertheaud, Peter J
• Assistant Examiner(s): KASTURE, DNYANESH G
• Application Number:
  US11/887,179
• Publication Number:
  US 20090016915A1
• Time in Patent Office: 2,743 Days
• Field of Search: 417/477.1, 417/477.2, 417/474, 417/3, 604/4.01
• US Class Current: 417/477.2
• CPC Class Codes: A61M 1/3621 Extra-corporeal blood circuits single-needle circuits A61M1/30
• CPC Class Codes: A61M 1/3622 with a cassette forming partially or totally the blood circuit
• CPC Class Codes: A61M 1/36225 with blood pumping means or components thereof
• CPC Class Codes: A61M 1/36226 Constructional details of cassettes, e.g. specific details on material or shape
• CPC Class Codes: A61M 1/362264 the filter being a blood filter
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/279 Peristaltic pumps, e.g. roller pumps
• CPC Class Codes: A61M 60/284 Linear peristaltic pumps
• CPC Class Codes: F04B 43/082 the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism
• CPC Class Codes: F04B 43/1253 by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing

Abstract

The invention relates to a pump, especially usable as a peristaltic pump in an apparatus for blood treatment, wherein it is provided with at least a hammer element which interacts with at least one tube portion in which a fluid to be pumped flows and with motion means for said hammer element which push the hammer element against said tube portion so as to press it, the value of the stroke executed by said element not allowing the complete crushing of the tube itself.

Claims

1. An apparatus for blood treatment, comprising a base provided with a linear pump and a disposable cartridge provided with a plurality of components necessary for the treatment procedure, with at least one tube portion for the fluid to be pumped and with a rigid wall, wherein said pump comprises:

at least one pumping body, the at least one pumping body being provided with a first hammer element which interacts with said at least one tube portion, pressing the same at least one tube portion against said rigid wall of the disposable cartridge, an additional hammer element positioned upstream to said first hammer element, and another additional hammer element positioned downstream to said first hammer element;

a motion mechanism for said first hammer element and for said two additional hammer elements, which sequentially pushes said first hammer element and said two additional hammer elements against said at least one tube portion so as to sequentially be moved to engage corresponding points of said at least one tube portion so as to obtain a peristaltic effect, the value of the stroke executed by said first hammer element not allowing the complete pressing of said at least one tube portion itself and preventing the contact between inner walls of said at least one tube portion, and the value of the stroke executed by said additional hammer elements allowing the complete pressing of the tube itself so as to occlude the at least one tube portion;

said first hammer element being longer than said two additional hammer elements so to define two valves by means of the action of said two additional hammer elements, respectively downstream and upstream;

wherein said disposable cartridge is formed by a container which defines said rigid wall and which contains the components necessary for a treatment procedure and for the corresponding internal connections;

said components of the disposable cartridge and said connections being preassembled, so as to be ready for use, allowing the starting of the blood treatment by means of the direct association of said disposable cartridge to said linear pump;

wherein said at least one tube portion projects from said disposable cartridge, so as to be ready to be placed in correspondence of said hammer element and said additional hammer elements;

wherein said at least one tube portion of the disposable cartridge is split into two or more ducts in a section of said at least one tube portion, said ducts, upstream and downstream to the area on which the pump acts, being joined again, so as to re-form said at least one tube portion, and wherein the pump comprises two or more pumping bodies acting on said two or more ducts, said pumping bodies being reverse-phase operated so that their hammer elements alternatively interact with corresponding ducts, in order to obtain a continuous flux;

wherein said components necessary for a treatment procedure contained by said disposable cartridge comprise at least a hemofilter and an oxygenator device; and

wherein said disposable cartridge is provided with an identification element which can be unequivocally associated with a corresponding element of said base.

2. The apparatus of claim 1, wherein said identification element is a chip and said corresponding element is a chip reader.

3. The apparatus of claim 1, wherein said additional hammer elements are provided with symmetrical profiles.