PULSATILE ROTARY VENTRICULAR PUMP

• US 20100150759A1
• Filed: 12/01/2006
• Published: 06/17/2010
• Est. Priority Date: 12/01/2005
• Status: Active Grant

• Current Assignee: Michigan Critical Care Consultants, Inc.
• Original Assignee: Michigan Critical Care Consultants, Inc.
• Inventors: Osterholzer, Kathryn R., Merz, Scott I., Mazur, Daniel E.
• Granted Patent: US 8,162,634 B2
• Time in Patent Office: Days
• US Class Current: 417/477.130
• CPC Class Codes: F04B 43/0072 of tubular flexible members
• CPC Class Codes: F04B 43/1215 having no backing plate (deforming of the tube only by rollers)
• CPC Class Codes: F04B 53/00 Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00

Abstract

A roller pump conduit defining a pump chamber is provided. The roller pump conduit includes a roller contact portion having a fill region and a delivery region. The fill region has a first taper configured to determine volume delivery per revolution of a roller head. The delivery region has a pressure region having a second taper and a discharge region having a third taper. The third taper has a lesser degree of taper than the second taper. The delivery region is configured to produce a pulsatile flow out of the conduit.

Furthermore, a roller pump having a roller pump conduit is provided. The roller pump conduit of the roller pump has a fill region and a delivery region, the fill region having a first taper, and the delivery region having a second and third taper, wherein the third taper has lesser degree of taper than the second taper.

Claims

1. A roller pump conduit defining a pump chamber comprising:

a roller contact portion having a fill region and a delivery region,

the fill region having a first taper and being configured to determine volume delivery per revolution of a roller head,

the delivery region comprising;

a pressure region having a second taper; and

a discharge region having a third taper, the third taper having a lesser degree of taper than the second taper;

the delivery region being configured to produce a pulsatile flow out of the conduit.

2. The roller pump conduit of claim 1, wherein the degree of taper of the third taper is equal to about zero.

3. The roller pump conduit of claim 2, wherein the discharge region has a constant width.

4. The roller pump conduit of claim 1, wherein the degree of taper of the first taper is equal to about zero.

5. The roller pump conduit of claim 4, wherein the fill region has a constant width.

6. The roller pump conduit of claim 1, wherein the pressure region is configured to produce a systolic portion of the pulsatile flow.

7. The roller pump conduit of claim 1, wherein the discharge region is configured to produce a diastolic portion of the pulsatile flow.

8. The roller pump conduit of claim 1, further comprising a bias region operable to receive fluid into the conduit.

9. The roller pump conduit of claim 8, wherein the bias region comprises a low volume shut-off region, operable to stop the flow of fluid into the fill region when the shut-off region is compressed.

10. The roller pump conduit of claim 1, wherein the conduit is manufactured by injection molding.

11. A roller pump for pumping fluids, comprising:

a plurality of rollers located in spaced apart relation, the rollers attached to a rotor having a drive shaft;

a flexible conduit in mechanical communication with at least two of the plurality of rollers, the flexible conduit comprising;

a roller contact portion having a fill region and a delivery region,

the fill region having a first taper and being configured to determine volume delivery per revolution of a roller head,

the delivery region comprising;

a pressure region having a second taper; and

a discharge region having a third taper, the third taper having a lesser degree of taper than the second taper;

the delivery region being configured to produce a pulsatile flow out of the conduit.

12. The roller pump of claim 11, wherein the degree of taper of the third taper is equal to about zero.

13. The roller pump of claim 12, wherein the discharge region has a constant width.

14. The roller pump of claim 11, wherein the degree of taper of the first taper is equal to about zero.

15. The roller pump of claim 14, wherein the fill region has a constant width.

16. The roller pump of claim 11, wherein the pressure region of the flexible conduit is configured to produce a systolic portion of the pulsatile flow.

17. The roller pump conduit of claim 11, wherein the discharge region of the flexible conduit is configured to produce a diastolic portion of the pulsatile flow.

18. The roller pump of claim 11, wherein the flexible conduit further comprises a bias region operable to receive fluid into the conduit.

19. The roller pump of claim 18, wherein the bias region of the flexible conduit comprises a low volume shut-off region, operable to stop the flow of fluid into the fill region when the shut-off region is compressed.

20. The roller pump of claim 11, wherein the flexible conduit is manufactured by injection molding.