Device for preventing a free catheter flow

• US 8,114,056 B2
• Filed: 12/22/2009
• Issued: 02/14/2012
• Est. Priority Date: 06/29/2007
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics International AG (Roche Holding AG)
• Inventors: Niklaus, Hanspeter, Haenggi, Roger
• Primary Examiner(s): Lucchesi, Nicholas
• Assistant Examiner(s): BERDICHEVSKY, AARTI
• Application Number:
  US12/644,446
• Publication Number:
  US 20100185151A1
• Time in Patent Office: 784 Days
• Field of Search: 604/246, 604/247, 604/250, 604/256
• US Class Current: 604/250
• CPC Class Codes: A61M 25/0075 Valve means
• CPC Class Codes: A61M 39/08 Tubes; Storage means specially adapted therefor
• CPC Class Codes: A61M 39/22 Valves or arrangement of valves A61M39/02, A61M39/0247, A61M39/16 take precedence; regulating valves in infusion systems A61M5/16881; in devices worn by the patient for the reception of urine, faeces, catamenial or other discharge, or in colostomy devices A61F5/4405
• CPC Class Codes: A61M 39/28 Clamping means for squeezing flexible tubes, e.g. roller clamps tube strippers A61M1/83

Abstract

A catheter for connecting an administering device to an administering needle, the catheter including a catheter wall, a flow region limited by the catheter wall, and at least one catheter portion at which at least one partial piece of the catheter wall abuts at least one other partial piece of the catheter wall to releasably block or obstruct the flow of a medium through the catheter, wherein the flow is unblocked or opened when the medium exhibits a pressure above a predetermined blocking pressure.

Claims

1. A device for preventing free flow through a catheter for connecting an administering device to an administering needle comprising:

the catheter comprising a catheter wall, and a flow region defined by the catheter wall, the catheter having a number of linear sections and intermediate sections connecting a distal end of one linear section with a proximal end of the next linear section; and

a clip comprising an upper part and a lower part, the catheter arranged in the clip so that adjacent linear sections of the catheter are parallel to each other, and the intermediate section connecting one linear section to the next linear section is sharply bent, and wherein in the sharply bent intermediate sections, at least one partial piece of an inner wall abuts at least one other partial piece of the inner wall to block a flow of a medium through the catheter, wherein the partial pieces are separated when the medium exhibits a pressure above a predetermined blocking pressure, thereby permitting the flow.

2. The device of claim 1 wherein the clip includes parallel partition walls and wherein the linear sections of the catheter are arranged between the parallel partition walls.

3. The catheter according to claim 1, wherein the blocking pressure is around at least 0.1 bar or above.

4. The catheter according to claim 3, wherein the blocking pressure is one of approximately 0.2 bar, approximately 0.3 bar or approximately 0.7 bar.

5. A system comprising:

an administering device; and

a catheter for connecting the administering device to a needle, the catheter comprising a catheter wall and a flow region defined by the catheter wall, the catheter having a number of linear sections and intermediate sections connecting a distal end of one linear section with a proximal end of the next linear section; and

a clip comprising an upper part and a lower part, the catheter arranged in the clip so that adjacent linear sections of the catheter are parallel to each other, and the intermediate section connecting one linear section to the next linear section is sharply bent, and wherein in the sharply bent intermediate sections, at least one partial piece of an inner wall abuts at least one other partial piece of the inner wall to block a flow of a medium through the catheter, wherein the partial pieces are separated when the medium exhibits a pressure above a predetermined blocking pressure, thereby permitting the flow.

6. The system of claim 5 wherein the clip includes parallel partition walls and wherein the linear sections of the catheter are arranged between the parallel partition walls.

7. The system according to claim 5, wherein the blocking pressure is around at least 0.1 bar or above.

8. The system according to claim 7, wherein the blocking pressure is one of approximately 0.2 bar, approximately 0.3 bar or approximately 0.7 bar.

9. The system according to claim 5, wherein the administering device is an infusion pump.

10. The system according to claim 9, wherein the catheter has two ends and wherein one of the needle or an infusion set is connected to the end of the catheter opposite the end of the catheter connected to the infusion pump.

11. The system according to claim 10, wherein the clip is near the infusion pump.

12. A method for controlling a flow of a medium through a catheter, the method comprising the steps of:

providing the catheter comprising a catheter wall, and a flow region defined by the catheter wall, the catheter having a number of linear sections and intermediate sections connecting a distal end of one linear section with a proximal end of the next linear section; and

a clip comprising an upper part and a lower part, the catheter arranged in the clip so that adjacent linear sections of the catheter are parallel to each other, and the intermediate section connecting one linear section to the next linear section is sharply bent, and wherein in the sharply bent intermediate sections, at least one partial piece of an inner wall abutting at least one other partial piece of the inner wall to block a flow of a medium through the catheter below a predetermined minimum pressure of the medium to prevent the flow of the medium through the catheter, and

exceeding the minimum pressure to separate the partial pieces in the sharply bent regions sections to enable the flow.

13. The method of claim 12 wherein the clip includes parallel partition walls and wherein the linear sections of the catheter are arranged between the parallel partition walls.

14. The method according to claim 12, wherein the blocking pressure is around at least 0.1 bar or above.

15. The method according to claim 14, wherein the blocking pressure is one of approximately 0.2 bar, approximately 0.3 bar or approximately 0.7 bar.

16. The method according to claim 12, further comprising providing an administering device connected to the catheter.

17. The method according to claim 16 wherein the administering device is an infusion pump.

18. The method according to claim 16, wherein the catheter has two ends and wherein one of a needle or an infusion set is connected to the end of the catheter opposite the end of the catheter connected to the administering device.

19. The method according to claim 18, wherein the clip is near the administering device.