Dialysis catheter assembly

• US 8,449,525 B2
• Filed: 06/21/2011
• Issued: 05/28/2013
• Est. Priority Date: 06/21/2011
• Status: Active Grant

• Current Assignee: Mozarc Medical US LLC
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Burnes, Lee C., Pruitt, Sean
• Primary Examiner(s): BERDICHEVSKY, AARTI
• Application Number:
  US13/165,097
• Publication Number:
  US 20120330231A1
• Time in Patent Office: 707 Days
• Field of Search: 604/509, 604/103.02
• US Class Current: 604/509
• 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 2025/105 having a balloon suitable for drug delivery, e.g. by using holes for delivery, drug coating or membranes
• CPC Class Codes: A61M 2025/1065 having a balloon which is inversely attached to the shaft at the distal or proximal end
• CPC Class Codes: A61M 25/0017 specially adapted for long-term hygiene care, e.g. urethral or indwelling catheters to prevent infections
• CPC Class Codes: A61M 25/0026 Multi-lumen catheters with stationary elements catheter assemblies comprising a catheter in combination with a guide tube, sheath or sleeve A61M2025/0681; catheters comprising telescoping coaxial elements A61M2025/0175
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence
• CPC Class Codes: A61M 25/1025 Connections between catheter tubes and inflation tubes
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

A catheter assembly includes an elongated main body defining two or more longitudinal lumens including distally positioned openings. One or more side-ports are defined in the main body communicating with at least one of the two or more longitudinal lumens. The catheter assembly also includes an inflatable balloon disposed around a portion of the main body. The inflatable balloon includes a distal end disposed substantially adjacent to a proximal side of one or more side-ports. The inflatable balloon in the inflated state is adapted to extend at partially over the one or more side-ports.

Claims

1. A method of dislodging tissue from a catheter, the method comprising:

providing a dialysis catheter comprising

an elongated main body defining a longitudinal axis and having a length along the longitudinal axis between a distal end and a proximal end, the elongated main body defining at least one internal lumen,

a side-port in fluid communication with the at least one internal lumen, and

an inflatable balloon disposed adjacent to the side-port on an outer surface of the elongated main body and configured to move from a deflated state to an inflated state; and

inflating the inflatable balloon to dislodge tissue from the elongated main body by expanding the inflatable balloon in a distal direction so that at least a distal portion of the inflatable balloon extends over at least a proximal portion of the side-port and moves material away from, or into, the side port as the inflatable balloon expands in the distal direction.

2. The method of claim 1 wherein the inflatable balloon is disposed adjacent the distal end of the elongated main body.

3. The method of claim 1 wherein the inflatable balloon is coated with a base polymer layer.

4. The method of claim 1 further comprising the step of inflating the inflatable balloon evenly around the elongated main body of the dialysis catheter.

5. The method of claim 1 wherein the dialysis catheter further comprises a plurality of side-ports in fluid communication with a plurality of internal lumens.

6. The method of claim 1 further comprising the step of providing heparin to the side-port to clear the side-port by chemical reaction.

7. The method of claim 1 further comprising providing an end cap adapted to fluidly seal the at least one internal lumen.

8. The method of claim 1 further comprising the step of sealing a distal end of the at least one internal lumen to enable inflation fluid to exert pressure into the inflatable balloon.

9. The method of claim 1 further comprising the step of supplying saline to the inflatable balloon.

10. The method of claim 1 further comprising the step of connecting the dialysis catheter to a medical device.

11. The method of claim 1 wherein the inflatable balloon is a drug eluting balloon.

12. The method of claim 11 wherein the drug eluting balloon elutes an anti-restenotic agent.

13. The method of claim 1 wherein the inflatable balloon includes pores.

14. The method of claim 13 further comprising the step of providing a pressure greater than 8 atmospheres to the inflatable balloon to open the pores.

15. The method of claim 1 wherein the inflatable balloon is configured to extend at least partially over the side-port when in the inflated state.

16. The method of claim 15 further comprising:

deflating the inflatable balloon; and

flowing fluid through the internal lumen and out the side-port to remove any tissue dislodged by the inflatable balloon into the side-port.