Device for cannulation of a hollow organ

• US 20080188806A1
• Filed: 08/31/2007
• Published: 08/07/2008
• Est. Priority Date: 09/01/2006
• Status: Active Grant

• Current Assignee: Novalung GmbH (Fresenius Medical Care AG)
• Original Assignee: Novalung GmbH (Fresenius Medical Care AG)
• Inventors: Cattaneo, Giorgio, Spranger, Martin
• Granted Patent: US 8,500,689 B2
• Time in Patent Office: Days
• US Class Current: 604/104
• CPC Class Codes: A61M 2025/0024 Expandable catheters or sheaths
• CPC Class Codes: A61M 2025/0031 characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
• CPC Class Codes: A61M 2025/0078 for fluid inflow from the body into the catheter lumen
• CPC Class Codes: A61M 2205/0266 Shape memory materials
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/0082 Catheter tip comprising a tool
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 25/0662 Guide tubes
• CPC Class Codes: A61M 25/0693 Flashback chambers
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

There is disclosed a device for cannulation of a hollow organ, in particular of an arterial or venous blood vessel of a mammalian body, e.g., human,, said device comprising a cannula that has a proximal end, a distal end, and a central section located between the proximal end and distal end. The distal end has an expandable structure which can be converted, for example by means of a dilator, from a non-expanded state to an expanded state, and the expandable structure comprises openings at least in the expanded state.

Claims

1. Device for cannulation of a hollow organ in a mammalian body comprising a cannula that has a proximal end, a distal end, and a central section located between the proximal end and distal end, and the cannula, after introduction into the vessel, being in fluid communication with the vessel, and the distal end having an expandable structure which can be converted from a non-expanded state to an expanded state, and the expandable structure comprising openings at least in the expanded state.

2. Device according to claim 1, wherein the expandable structure is a self-expanding structure.

3. Device according to claim 1, wherein the expandable structure has a material chosen from the group comprising elastic plastics, superelastic plastics, elastic metals, superelastic metals.

4. Device according to claim 1, wherein the expandable structure has a material with shape-memory properties.

5. Device according to claim 4, wherein the material is nitinol.

6. Device according to claim 1, wherein the expandable structure has the configuration of a self-expandable braided stent.

7. Device according to claim 1, wherein the cannula has a wire-reinforced, stent-like main frame, the proximal end and the central section being coated with a plastic in order to form a liquid-tight tube section.

8. Device according to claim 6, wherein the braided stent or the stent-like main frame has variable angles along its length.

15. Device according to claim 1, wherein the cannula has variable diameters along its length.

9. Device for cannulation of a hollow organ in a mammalian body comprising a cannula that has a proximal end, a distal end, and a central section located between the proximal end and distal end, and the cannula, after introduction into the vessel, being in fluid communication with the vessel, and the distal end having an expandable structure which can be converted from a non-expanded state to an expanded state, and the expandable structure comprising openings at least in the expanded state, and the device comprising a dilator with a proximal area and a distal area and with a central section located between the proximal area and distal area, which dilator is used to insert the cannula and is provided inside the latter.

10. Device according to claim 9, wherein the expandable structure can be displaced along its length through the dilator.

11. Device according to claim 9, wherein the dilator has a channel-like passage that extends from the distal area of the dilator to at least the central section of the dilator.

16. Device according to claim 9, wherein the cannula has variable diameters along its length.

12. Device for cannulation of a hollow organ in a mammalian body comprising a cannula that has a proximal end, a distal end, and a central section located between the proximal end and distal end, and the cannula, after introduction into the vessel, being in fluid communication with the vessel, and the distal end having an expandable structure which can be converted from a non-expanded state to an expanded state, and the expandable structure comprising openings at least in the expanded state, and the device comprising a dilator with a proximal area and a distal area and with a central section located between the proximal area and distal area, which dilator is used to insert the cannula and is provided inside the latter, the device having a channel-like passage that extends from the distal area of the dilator to at least the central section of the dilator, wherein the channel-like passage is provided as an elongate depression on the surface of the dilator, one end of the passage being provided as an inlet in the distal area of the dilator, and the other end of the passage being provided as an outlet in the proximal end or in the central section.

13. Device according to claim 12, wherein the inlet and the outlet are each provided with a membrane-like cover.

14. Device according to claim 12, wherein the passage contains a free-flowing or gaseous medium.

17. Device according to claim 12, wherein the cannula has variable diameters along its length.