Catheter device

• US 8,007,488 B2
• Filed: 07/29/2008
• Issued: 08/30/2011
• Est. Priority Date: 11/10/2005
• Status: Active Grant

• Current Assignee: Phase One Medical, LLC
• Original Assignee: Phase One Medical, LLC
• Inventors: Ravenscroft, Adrian C.
• Primary Examiner(s): Stigell; Theodore
• Assistant Examiner(s): Bosques; Edelmira
• Application Number:
  US12/181,965
• Publication Number:
  US 20080287888A1
• Time in Patent Office: 1,127 Days
• Field of Search: 604/96.01, 604/523, 604/536, 604 9901- 9904, 604/510, 604/192, 604/167.04, 604/533, 604/237, 604/106, 604/537, 604/250, 604/26, 604/393, 604/136, 604/43, 604/107
• US Class Current: 604/523
• CPC Class Codes: A61M 1/3661 for haemodialysis
• CPC Class Codes: A61M 2025/0031 characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
• CPC Class Codes: A61M 2025/0037 characterized by lumina being arranged side-by-side
• CPC Class Codes: A61M 2025/0096 being laterally outward extensions or tools, e.g. hooks or fibres
• CPC Class Codes: A61M 2025/0177 having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes
• CPC Class Codes: A61M 25/003 characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves catheter tips A61M25/0067
• CPC Class Codes: A61M 25/0043 characterised by structural features
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/0075 Valve means

Abstract

A catheter includes an elongate body having first and second chambers extending within the elongate body from a proximal end to an intermediate section, the first chamber having a first opening and the second chamber having a second opening at the intermediate section. The catheter also includes a valve structure that may have first and second barrier elements to open or close the first and second openings, respectively. The first and the second barrier elements may be coupled by a connecting structure moving within an opening in a guide structure. Alternatively, the first and the second barrier elements may be coupled in a U-shaped structure that moves over the guide structure. To permit flushing of the chambers when the first and second openings are closed, the first and second chambers may also be connected by a connecting channel defined by an opening in a wall of the elongate body.

Claims

1. A catheter, comprising:

an elongate body with a distal end, a proximal end, and an intermediate section disposed between the distal end and the proximal end, the elongate body having a central longitudinal axis and including;

a first chamber extending within the elongate body from the proximal end to the intermediate section and a second chamber extending within the elongate body from the proximal end to the intermediate section, the first chamber having a first chamber opening at the intermediate section, and the second chamber having a second chamber opening at the intermediate section; and

a wall extending from the proximal end to the intermediate section to separate the first chamber from the second chamber, the wall further extending distally past the first chamber opening and the second chamber opening to provide a guide structure extending from the intermediate section toward the distal end; and

a valve structure extending coaxially with the elongate body, the valve structure having first and second tapered portions and configured to be axially displaced along the guide structure between a covered position where the valve structure is positioned to inhibit flow through the first and second chamber openings and an uncovered position where the valve structure is positioned to permit flow through the first and second chamber openings, and wherein the shape of the first and second tapered portions remains constant during axial displacement.

2. The catheter of claim 1, wherein the first and second tapered portions each include at least one sealing structure providing a sealing engagement with walls of the corresponding first chamber opening or second chamber opening when the valve structure is in the covered position.

3. The catheter of claim 1, wherein the first and second tapered portions are formed from a soft elastomer.

4. The catheter of claim 1, wherein the first and the second tapered portions each include a corresponding partially domed structure extending from the corresponding tapered structure toward the distal end.

5. The catheter of claim 4, wherein the partially domed structures are formed from a hard plastic.

6. The catheter of claim 1 further comprising:

a joining structure connecting the first and the second tapered portions, the connecting structure passing through an opening extending along the guide structure, the connecting structure moving along the opening when the valve structure moves between the covered position and the uncovered position.

7. The catheter of claim 6, wherein the connecting structure is a thin strip and the opening in the guide structure is an elongate slit.

8. The catheter of claim 6, further comprising a control wire coupled to the connecting structure, the control wire being movable to control movement of the connecting structure along the opening and corresponding movement of the valve structure between the covered position and the uncovered position.

9. The catheter of claim 8 wherein the control wire extends through a channel in the wall separating the first chamber and the second chamber.

10. The catheter of claim 8, further comprising a guide wire channel extending through the control wire, the guide wire channel configured to receive a guide wire configured to position the elongate body in a body passageway.

11. The catheter of claim 1, wherein the guide structure substantially separates the inflow into the second chamber from the outflow from the first chamber.

12. The catheter of claim 1, wherein the first chamber opening and the second chamber opening are positioned according to a configuration that substantially separates the inflow into the second chamber from the outflow from the first chamber.

13. The catheter of claim 1, wherein the first chamber opening and the second chamber opening are positioned on opposite sides of the guide structure.

14. The catheter of claim 1, wherein the first chamber opening and the second chamber opening are positioned in the intermediate section at substantially equal distances from the distal end.

15. The catheter of claim 1 wherein the valve structure defines the distal end of the elongate body.

16. The catheter of claim 1 wherein the guide structure defines the distal end of the elongate body.

17. The catheter of claim 1, wherein the valve structure extends from a position at the first chamber opening and the second chamber opening and determines a first flow from the first chamber and a second flow from the second chamber when the valve structure is in the uncovered position, the first flow being substantially separated from the second flow.

18. The catheter of claim 1, wherein the first tapered portion is positioned at a spacing from the first chamber opening and the second tapered portion is positioned at a spacing from the second chamber opening when the valve structure uncovers the first chamber opening and the second chamber opening, the first taper portion spacing determining a first flow from the first chamber and the second taper portion spacing determining a second flow from the second chamber, the first flow being substantially separated from the second flow.

19. The catheter of claim 18, wherein at least a portion of the first tapered portion is disposed within the first chamber and at least a portion of the second tapered portion is disposed within the second chamber when the valve structure uncovers the first chamber opening and the second chamber opening.

20. The catheter of claim 1, wherein the first chamber opening is positioned in the intermediate section at a location closer to the distal end than the second chamber opening.

21. The catheter of claim 1, wherein the guide structure includes a rounded portion at the distal end of the catheter.

22. The catheter of claim 1, wherein the elongate body is further configured to maintain a constant length when the valve structure is displaced axially.

27. The catheter of claim 4 wherein the partially domed structure being disposed outside the corresponding first chamber or second chamber when the valve structure is in the covered position.

28. The catheter of claim 6 wherein the connecting structure moves along the opening when the valve structure is axially displaced between the covered position and the uncovered position.

23. A catheter, comprising:

an elongate body with a distal end, a proximal end, and an intermediate section disposed between the distal end and the proximal end, the elongate body including;

a first chamber and a second chamber extending within the elongate body from the proximal end to the intermediate section; and

a dividing wall extending from the proximal end to the distal end that separates the first chamber and the second chamber; and

a valve structure having a first proximally extending barrier and a second proximally extending barrier, the valve structure positioned on the dividing wall and movable relative to the intermediate section from a closed position wherein the first barrier engages with the first chamber and the second barrier engages with the second chamber and an open position where the valve structure is proximal to the elongate body distal end; and

an opening along the dividing wall, wherein the first and the second proximally extending barriers are connected by a connecting structure positioned within the opening, the first and second barriers configured to move along the opening.

24. The catheter of claim 23 wherein the elongate body is configured to maintain a constant length when the valve structure is moved.

25. The catheter of claim 23, wherein a distal end of the first chamber is closer to the distal end of the elongate body than a distal end of the second chamber.

26. The catheter of claim 23, wherein the first proximally extending barrier and the second proximally extending barrier each include a corresponding tapered structure that extends to fit into the first chamber and the second chamber, respectively, when the valve is in the closed position.