Disposable fluid path systems and methods for processing complex biological materials
View Patent ↗Disclosed herein is a disposable fluid path for processing complex materials. The disposable fluid path comprises a gravity assisted disposable system for separating a biological sample into two or more distinct submaterials through sedimentation. The fluid path is comprised of a sample delivery conduit and bag-set wherein the bag set comprising a tubing assembly, a separation assembly, and a filter assembly. Methods of using the system are also disclosed.
1. A gravity assisted disposable apparatus for separating a biological sample into two or more distinct submaterials through sedimentation comprising:
a sample delivery conduit; and
a bag-set in fluid communication with the sample delivery conduit and wherein said bag-set is a functionally-closed fluid path comprising;
a tubing assembly for transferring the biological material through the bag-set;
a separation assembly in fluid communication with the tubing assembly configured to receive the biological sample from the sample delivery conduit and to allow for sedimentation of a submaterial from the biological material; and
a filter assembly in fluid communication with the tubing assembly and the separation assembly, wherein said filter assembly is configured;
to receive the biological sample and at least one submaterial from the separation assembly through the tubing assembly for filtering;
to return retentate material to the separation assembly through a retentate conduit;
to deliver permeate material to the separation assembly through a permeate conduit; and
to return permeate material from the separation assembly to said filter assembly through the tubing assembly.
2. The apparatus of claim 1 wherein the separation assembly comprises:
an asymmetrical three dimensional processing bag having an oblong shaped upper portion and a funnel shaped lower portion wherein at least a portion of interior walls of said processing bag maintains separation during drainage of the biological sample and wherein the lower portion of said bag is sufficiently transparent to allow optical sensing;
an inlet port attached to the processing bag for receiving the biological sample from the sample delivery conduit;
a side port attached tangentially to the asymmetric funnel shaped lower portion of the processing bag for the delivery of a retentate from a retentate conduit;
a bottom port attached to the bottom portion of the processing bag from removing the biological sample from the processing bag; and
a permeate bag a configured to receive permeate solution from the filter assembly through a permeate conduit.
3. The apparatus of claim 2 wherein the processing bag further comprise fixture points to align the bag with an optical sensor.
4. The apparatus of claim 2 wherein the processing bag is aligned for sedimentation such that the oblong shaped upper portion vertically positioned above the funnel shaped lower portion.
5. The apparatus of claim 2 wherein the processing bag further comprising a filter membrane configured to allow air into or out of the system.
6. The apparatus of claim 5 further comprising a check valve positioned between the membrane filter and the processing bag.
7. The apparatus of claim 1 wherein the filter assembly comprises:
a hollow fiber filtration unit in fluid communication with the tubing assembly for filtering the biological sample and returning retentate material to a processing bag through the retentate conduit and permeate material to a permeate bag through the permeate conduit;
a supply bag in fluid communication with the tubing assembly and configured to supply an aggregating agent to a processing bag and to receive waste aggregate from the separation assembly; and
a storage unit in fluid communication with the tubing assembly and configured to receive a submaterial from the separation assembly.
8. The apparatus of claim 7 further comprising an in-line frangible connector situated between the supply bag and the tubing assembly.
9. The apparatus of claim 6 wherein the storage unit is comprised of material capable of undergoing cryogenic freezing and is compatible with biological cryogenic preservatives.
10. The apparatus of claim 7 wherein the hollow fiber filtration unit is disposed within a permeate bag, said permeate bag being a component of the separation assembly and wherein the permeate conduit is the external surface of the hollow fiber filtration unit.
11. The apparatus of claim 10 wherein the permeate bag further comprises a periscope tube, a partial partition, or a combination thereof.
12. The apparatus of claim 1 wherein the tubing assembly comprises a first end in fluid communication with an intake-valve subassembly and a second end in fluid communication with a filter-valve assembly, said tubing assembly configured to be integrated with a peristaltic pump such that the peristaltic pump externally manipulates fluid within the tube without directly contacting the fluid, and wherein:
the intake-valve subassembly is a multi-port diverter comprising a port connected to the processing bag and a second port connected to the permeate bag; and
the filter-valve subassembly is a multi-port diverter comprising a first port connected to the hollow fiber filtration unit, a second port connected to the supply bag, and a third port connected to the storage unit.
13. The apparatus of claim 12 wherein the multi-port diverters control flow with a non-pinch seal device.
14. The apparatus of claim 13 wherein the non-pinch seal device is a stopcock, a diagram valve, a butterfly valve, a ball valve, or a combination thereof.
15. The apparatus of claim 12 further comprising a membrane filter in fluid communication with the intake-valve subassembly and configured to allow air into the system.
16. The apparatus of claim 15 further comprising a check valve positioned between the membrane filter and intake-valve subassembly.
17. The apparatus of claim 12 wherein the permeate conduit of the separation assembly is in fluid communication with a port of the intake-valve subassembly.
18. The apparatus of claim 1 wherein the sample delivery conduit comprises a transfer spike, a luer-to-luer connection, a section for in-line tube welding, or a combination thereof.
19. The apparatus of claim 1 wherein the biological material is whole blood, cord blood or bone marrow.
20. The apparatus of claim 1 wherein the submaterial comprises blood cells, leukocytes, stem cells, nucleated cells or a combination thereof.
21. The apparatus of claim 1 wherein said system further comprises sensors for measuring at least one of fluid levels or pressure within the system.
22. The apparatus of claim 21 wherein the sensors comprise, pressure, optical, capacitive, or a combination thereof.
23. The apparatus of claim 1 further comprising a tray assembly, said tray assembly for positioning the assemblies of the system into a predetermined configuration.
24. The apparatus of claim 23 wherein the predetermined configuration is for at least one of quality control, protecting the subassemblies during movement, and facilitating engagement with an auxiliary system.
25. The apparatus of claim 23 wherein the tray further comprises a plurality of seating structures for positioning components of the bag-set to allow engagement of said components with an auxiliary system.
26. The apparatus of claim 25 wherein the components are an intake-valve subassembly and a filter-valve subassembly.