Extracorporeal blood treatment and system having reversible blood pumps

• US 8,475,398 B2
• Filed: 11/06/2009
• Issued: 07/02/2013
• Est. Priority Date: 12/03/2004
• Status: Expired due to Fees

• Current Assignee: Gambro Lundia AB (Baxter International Inc.)
• Original Assignee: Gambro UF Solutions, Inc. (Baxter International Inc.)
• Inventors: O'Mahony, John
• Primary Examiner(s): Zalukaeva, Tatyana
• Assistant Examiner(s): Chapman, Ginger T
• Application Number:
  US12/613,588
• Publication Number:
  US 20100114001A1
• Time in Patent Office: 1,334 Days
• Field of Search: 604/5.01, 604/4.01, 604/5.02, 604/5.04, 604/6.01, 604/6.09, 604/6.11, 422 44- 48, 623/3.1, 623/3.25, 623/3.28, 210645-652
• US Class Current: 604/5.01
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/34 Filtering material out of the blood by passing it through a membrane, i.e. hemofiltration or diafiltration
• CPC Class Codes: A61M 1/342 Adding solutions to the blood, e.g. substitution solutions for preventing coagulation A61M1/3672
• CPC Class Codes: A61M 1/36 Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
• CPC Class Codes: A61M 1/3626 Gas bubble detectors
• CPC Class Codes: A61M 1/3639 Blood pressure control, pressure transducers specially adapted therefor
• CPC Class Codes: A61M 1/3656 Monitoring patency or flow at connection sites; Detecting disconnections
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 2205/33 Controlling, regulating or measuring
• CPC Class Codes: A61M 2205/3306 Optical measuring means
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: A61M 2205/3334 Measuring or controlling the flow rate
• 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 60/37 Haemodialysis, haemofiltration or diafiltration
• CPC Class Codes: A61M 60/408 the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable
• CPC Class Codes: A61M 60/531 using blood pressure data, e.g. from blood pressure sensors
• CPC Class Codes: A61M 60/554 of blood pressure
• CPC Class Codes: A61M 60/857 Implantable blood tubes

Abstract

An extracorporeal blood processing method using a blood circuit comprising a pair of blood passages attached to opposite flow ends of a blood treatment device and said blood circuit is mounted on a blood pump console, the method includes: withdrawing blood from a vascular system of a human patient and drawing the blood into the blood circuit; pumping the withdrawn blood through one of the pair of blood passages using a first blood pump of the console and into the blood treatment device; pumping the treated blood from the treatment device through the other of the pair of blood passages using a second blood pump of the console; infusing the treated blood from the other blood passage and into the vascular system of the patient, and periodically reversing a flow direction of blood through the pair of blood passages and blood treatment device.

Claims

1. An extracorporeal blood treatment system comprising:

a blood circuit comprising a first blood passage coupled to a blood filter and a second blood passage coupled to the blood filter, wherein said first and second blood passages each are adapted to be coupled to a vascular system of a human patient;

at least one blood pump connectable to the first blood passage, wherein said pump is adapted to move blood through the first and second blood passages and the filter,

a filtrate collection container configured to receive filtrate withdrawn from the filter,

a single air-in-blood detector configured to simultaneously monitor both the first and second blood passages,

a pump controller operatively connected to the blood pump to control a rate of blood withdrawal into the blood circuit wherein the single air-in-blood detector comprises a housing including a slot configured to receive two or more passages configured as flow passages for extracorporeal blood;

a transmitter of wave energy in the housing and oriented to direct wave energy across the slot and through the two or more passages, and

a receiver of wave energy in the housing and oriented to receive wave energy transmitted by the transmitter, and the receiver configured to generate a signal indicative of the received wave energy passing through the two or more passages.

2. An extracorporeal blood treatment system as in claim 1 wherein said system further comprises a harness wearable by the patient and said harness supports the blood pump, filter, pump controller and filtrate collection container.

3. An extracorporeal blood treatment system as in claim 1 wherein the pump periodically reverses a blood flow direction through the passages.

4. An extracorporeal blood treatment system as in claim 1 wherein the pump periodically reverses the blood flow direction after a volume of blood flow through the circuit is no greater than 200 ml.

5. An extracorporeal blood treatment system as in claim 1 wherein the wave energy is ultrasonic energy, the transmitter is an ultrasonic transmitter and the receiver is an ultrasonic receiver.