Apparatus for enhanced plasmapheresis and methods thereof

• US 6,960,178 B2
• Filed: 07/15/2002
• Issued: 11/01/2005
• Est. Priority Date: 02/02/2000
• Status: Expired due to Fees

• Current Assignee: Xepmed Incorporated
• Original Assignee: Xepmed Incorporated
• Inventors: Duff, Daniel, Chang, Yu-An, Tu, Hosheng
• Primary Examiner(s): Sykes, Angela D.
• Assistant Examiner(s): Deak, Leslie R.
• Application Number:
  US10/195,814
• Publication Number:
  US 20020183677A1
• Time in Patent Office: 1,205 Days
• Field of Search: 604/6.04, 604/6.09, 604/5.04, 604/6.03, 210/637, 210/561, 210/247, 210/209, 210/297, 210/385, 210/359, 210/490, 210/107, 210/109, 210/321.87, 210/645, 210/767, 210/483, 210/494, 210/360.1, 210/787, 210780-782
• US Class Current: 604/6.04
• CPC Class Codes: A61M 1/26 and internal elements which are moving
• CPC Class Codes: A61M 1/262 rotating
• CPC Class Codes: A61M 1/3496 Plasmapheresis; Leucopheresis; Lymphopheresis A61M1/3472 takes precedence
• CPC Class Codes: A61M 1/3693 using separation based on different densities of components, e.g. centrifuging
• CPC Class Codes: B01D 63/16 Rotary, reciprocated or vibrated modules

Abstract

An apparatus and methods for enhanced plasmapheresis comprising a filter membrane under an orbital motion or movement that has optimal local shear forces and maximum plasma flow output. The methods for biological separation and therapies comprise platelet collection, viral particle removal, cell washing and processing for stem cell selection, bone marrow purging, red blood cell collection, auto-transfusion, auto-immune disease treatment, selective macro-molecule removal, toxin removal, LDL removal, extracorporeal plasma delipidation, and the like.

Claims

1. A method of treating autoimmune conditions of a patient comprising filtering the patient'"'"'s blood through a blood filtration apparatus in an orbital motion having a filter membrane means for separating a plasma constituent from the blood and returning cellular components of the patient'"'"'s blood back to said patient, wherein the filtering step is carried out with the blood filtration apparatus comprising a chamber having a hollow interior enclosed by a first plate, a second plate, and a flexible seal element between the first plate and the second plate, wherein the first plate is either essentially parallel to or at an acute angle to the second plate so as to form a chamber gap for the hollow interior;

means for directing blood into the chamber gap;

a non-rotational drive structure;

said second plate comprising the filter membrane means for separating plasma constituent from the blood, wherein the second plate is detachably coupled to said non-rotational drive structure that controls the second plate in an orbital motion in reference to a center axis of the first plate;

a collecting means;

means for directing the plasma constituent passing through said filter membrane means to said collecting means; and

means for directing from the chamber gap a remaining constituent of the blood out of the chamber.

2. The method of claim 1, wherein the autoimmune disease comprises multiple sclerosis.

3. The method of claim 1, wherein the filtering step is carried out with removing autoantibody from the patient'"'"'s blood.

4. A method of plasma purification, wherein said plasma comprises at least one unwanted element, the method comprising treating said plasma through a plasma filtration apparatus with a filtering membrane effective for separating the at least one unwanted element from the plasma, wherein the filtration apparatus is operated in an orbital motion.

5. The method of claim 4, wherein the treating step is carried out with the plasma filtration apparatus comprising a chamber having a hollow interior enclosed by a first plate, a second plate, and a flexible seal element between the first plate and the second plate, wherein the first plate is either essentially parallel to or at an acute angle to the second plate so as to form a chamber gap for the hollow interior;

means for directing the plasma into the chamber gap;

a non-rotational drive structure;

said second plate comprising the filter membrane for separating the at least one unwanted element from the plasma, wherein the second plate is detachably coupled to said non-rotational drive structure that controls the second plate in an orbital motion in reference to a center axis of the first plate;

a collecting means;

means for directing the separated plasma passing through said filter membrane means to said collecting means; and

means for directing from the chamber gap a remaining constituent of the plasma wit the unwanted element out of the chamber.

6. The method of claim 4, wherein the at least one unwanted element comprises low density lipoprotein (LDL).

7. The method of claim 6, wherein the treating step for separating LDL from the plasma comprises immunadsorption apheresis, wherein an LDL-specific immune factor is loaded onto the filtering membrane of the filtration apparatus effective for immunadsorption apheresis.

8. The method of claim 6, wherein the treating step for separating LDL from the plasma comprises dextran sulfate adsorption apheresis, wherein an LDL-specific dextran sulfate is loaded onto the filtering membrane of the filtration apparatus effective for dextran sulfate adsorption apheresis.

9. The method of claim 6, wherein the treating step for separating LDL from the plasma comprises heparin-induced extracorporeal LDL precipitation apheresis, wherein an LDL-specific heparin is loaded onto the filtering membrane of the filtration apparatus effective for heparin-induced extracorporeal LDL precipitation apheresis.

10. The method of claim 9, wherein the heparin-induced extracorporeal LDL precipitation apheresis further comprises fibrinogen removal.

11. The method of claim 4, wherein the at least one unwanted element comprises viral particle.

12. The method of claim 4, wherein the at least one unwanted element comprises toxins.

13. The method of claim 4, wherein the at least one unwanted element comprises metabolic substances.

14. The method of claim 4, wherein the at least one unwanted element comprises complement.

15. The method of claim 4, wherein the at least one unwanted element comprises autoantibody.

16. A method of cell washing for a patient comprising:

introducing a fluid supply into a filtration apparatus with a proper filtering membrane, wherein the filtration apparatus is operated in an orbital motion, wherein the fluid supply comprises cellular components and filtrate;

treating the fluid supply through said filtration apparatus;

separating cellular components from filtrate; and

collecting purified filtrate.

17. The method of claim 16, wherein the separated cellular components are stem cells.

18. The method of claim 16, wherein the fluid supply comprises bone marrow from the patient.

19. The method of claim 16 further comprising introducing a second fluid supply comprised of the separated cellular components with proper filtrate into a second filtration apparatus with a second filtering membrane characterized by an orbital motion for enhanced cell washing.