TRANSFER SETS FOR THERAPY OPTIMIZATION

• US 20100198138A1
• Filed: 01/29/2010
• Published: 08/05/2010
• Est. Priority Date: 01/30/2009
• Status: Active Grant

• Current Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Original Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Inventors: Connell, Brian J., Chapman, Paul R., Lo, Ying-Cheng
• Granted Patent: US 8,377,012 B2
• Time in Patent Office: Days
• US Class Current: 604/29
• CPC Class Codes: A61M 1/285 Catheters therefor
• CPC Class Codes: A61M 39/12 for joining a flexible tube to a rigid attachment
• CPC Class Codes: A61M 39/28 Clamping means for squeezing flexible tubes, e.g. roller clamps tube strippers A61M1/83
• CPC Class Codes: A61M 39/286 Wedge clamps, e.g. roller clamps with inclined guides

Abstract

Transfer sets are disclosed in the present patent. The transfer set provides a connection between a source of peritoneal dialysis fluid and a patient for whom peritoneal dialysis has been prescribed. The transfer sets disclosed herein are smaller and provide a more compact and convenient device by which a dialysis patient controls the flow of dialysis fluid to and from the peritoneum of the patient. The devices are more compact and convenient because they include more convenient mechanisms for starting and stopping flow of the dialysis fluid. It is also easy to determine whether the mechanism is in a closed or open configuration by simply looking at the mechanism.

Claims

1. A transfer system comprising:

a connector having a luer connection on one end and a connection for tubing on an opposite end;

an upper housing and a lower housing adapted to fit around the tubing, the upper and lower housings assembled about a portion of the connector;

first and second occluding pins captured within slots of the upper and lower housings, the first and second occluding pins adapted to occlude and open a lumen of the tubing; and

left and right retractors are configured about the upper and lower housings, the left and right retractors each having an upper and a lower cam surface for the first and second occluding pins,

wherein the tubing is occluded by moving the retractors to a first position in which the first and second occluding pins squeeze and occlude the tubing and wherein the tubing is opened by moving the retractors to a second position in which the first and second occluding pins are retracted, allowing the tubing to open.

2. The transfer system according to claim 1, wherein the first and second occluding pins each include first and second roller bearings on ends of the occluding pins.

3. The transfer system according to claim 1, wherein the cam surfaces include a narrow occluding portion, a wider open portion and a transition portion between the occluding and wider open portions.

4. The transfer system according to claim 1, wherein the slots are perpendicular to a longitudinal axis of the tubing.

5. The transfer system according to claim 1, wherein the luer connection is a male luer connection and further including a cap for the male luer connection.

6. The transfer system according to claim 1, which is adapted for movement of the retractors along a longitudinal axis of the tubing to occlude and to open the tubing.

7. The transfer system according to claim 1, wherein a force for perpendicular movement of the occluding pins is provided by the tubing.

8. The transfer system according to claim 1, wherein the connector further includes undercuts for capturing the upper and lower housings.

9. A transfer system comprising:

a connector having a luer connection on one end and a connection for tubing on an opposite end;

a bisected lever arm with an opening for accommodating the tubing at one end and an occluding mechanism at an opposite end, the occluding mechanism including left and right bearing surfaces and left and right axles mounted eccentrically on the left and right bearing surfaces;

an upper housing and a lower housing configured for assembly around the tubing and a portion of the connector, and wherein the left and right bearing surfaces mount in mounting surfaces of the upper and lower housings; and

a bushing for mounting on the left and right axles,

wherein the tubing is occluded when the lever arm is in a first position and the bushing squeezes and occludes the tubing and wherein the tubing is opened when the lever arm is in a second position and the bearing surfaces and the bushing are retracted, allowing the tubing to open.

10. The transfer system of claim 9, wherein the connector further includes undercuts for capturing the upper and lower housings.

11. The transfer system of claim 9, wherein the first and second positions differ by a 180°

rotation of the lever arm.

12. The transfer system of claim 9, wherein the lever arm is aligned along a longitudinal axis of the tubing in the first and second positions.

13. The transfer system of claim 9, wherein the luer connection is a male luer connection and further including a cap for the male luer connection.

14. The transfer system of claim 9, wherein the upper and lower housings are held together by welding, bonding, or clamping.

15. A transfer system comprising:

a connector having a luer connection on one end and a tubing connection on an opposite end;

a clamp front comprising an upper portion and a lower portion, the upper portion including a longitudinal opening for tubing and a transverse rib for occluding the tubing, the lower portion including at least one deformable tab and a transverse opening;

a clamp back comprising an upper portion and a lower portion, the upper portion including a longitudinal opening for tubing and a catch, the lower portion comprising a left half and a right half, each half including a first smaller transverse opening and a second larger transverse opening, wherein a portion of the clamp front fits between the left half and the right half;

a left horn ring and a right horn ring for mounting in the lower portion transverse openings of the clamp front and the larger transverse openings of the clamp back; and

an occluder for mounting in the smaller transverse openings of the clamp back lower portion,

wherein the tubing is occluded when the transverse rib is in a first position and the transverse rib and the transverse occluder press against the tubing to occlude the tubing, and wherein the tubing is opened when the transverse rib is in a second position and the transverse rib does not press against the tubing.

16. The transfer system according to claim 15, wherein the occluder includes a pin for mounting in the smaller transverse openings and a roller mounted over the pin.

17. The transfer system according to claim 15, wherein the clamp front is deformable and the clamp back is stiff, and the first position is achieved when the at least one deformable tab engages the catch.

18. The transfer system according to claim 15, wherein the horn rings and the occluder are stiff.

19. The transfer system according to claim 15, wherein a change from the first position to the second position is achieved by rotation of the clamp front with respect to the clamp back.

20. The transfer system according to claim 15, wherein the horn rings each comprise an inner portion and a flange.

21. The transfer system according to claim 15, wherein the clamp front upper portion fits within the clamp back upper portion.

22. The transfer system according to claim 15, wherein the clamp front upper portion comprises a wider first portion comprising the longitudinal opening for tubing and a narrower second portion comprising the transverse rib.

23. The transfer system of claim 15, further including an alarm having an output sensible by a patient.

24. A transfer system comprising:

a connector having a luer connection on one end and a connection for tubing on an opposite end;

an upper housing and a lower housing configured for assembly around the tubing and a portion of the connector, the assembled upper and lower housings captured by the connector;

at least one occluding pin captured within one of the upper and lower housings; and

a mechanism for moving the at least one occluding pin into and out of bearing contact with the tubing for occluding the tubing, wherein the mechanism has a first retracted position for occluding the tubing and a second extended position for not occluding the tubing, and

wherein the retracted and extended positions are distinct from one another and are visible to a user of the transfer system.

25. The transfer system of claim 24, wherein the at least one occluding pin is a single occluding pin and further includes a bisected lever arm with eccentrically mounted axles for mounting the single occluding pin.

26. The transfer system of claim 24, wherein the at least one occluding pin comprises two occluding pins mounted on opposite sides of the tubing, and wherein the mechanism comprises left and right retractors with cam surfaces for moving the two occluding pins into and out of bearing contact with the tubing.