CATHETER ASSEMBLY AND COMPONENTS THEREOF

• US 20100204675A1
• Filed: 04/27/2010
• Published: 08/12/2010
• Est. Priority Date: 11/03/2006
• Status: Active Grant

• Current Assignee: B Braun Melsungen AG (B. Braun Holding GmbH & Co. KG)
• Original Assignee: B Braun Melsungen AG (B. Braun Holding GmbH & Co. KG)
• Inventors: Zerbes, Michael, Woehr, Kevin
• Granted Patent: US 8,419,688 B2
• Time in Patent Office: Days
• US Class Current: 604/500
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150213 Venting means
• CPC Class Codes: A61B 5/150221 Valves
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150511 Details of construction of shaft
• CPC Class Codes: A61B 5/150648 fully automatically triggered, i.e. the triggering of the protective sleeve does not require a deliberate action by the user such as terminating the contact with the patient's skin
• CPC Class Codes: A61B 5/150992 Blood sampling from a fluid line external to a patient, such as a catheter line, combined with an infusion line; blood sampling from indwelling needle sets, e.g. sealable ports, luer couplings, valves tubing connectors and couplings A61M39/00
• CPC Class Codes: A61B 5/153 Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
• CPC Class Codes: A61M 2005/3247 Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
• CPC Class Codes: A61M 2039/0202 for taking samples
• CPC Class Codes: A61M 2039/0205 for injecting media
• CPC Class Codes: A61M 2039/062 used with a catheter
• CPC Class Codes: A61M 2039/0633 the seal being a passive seal made of a resilient material with or without an opening
• CPC Class Codes: A61M 2039/064 Slit-valve
• CPC Class Codes: A61M 2039/0686 comprising more than one seal
• CPC Class Codes: A61M 2209/10 Equipment for cleaning
• CPC Class Codes: A61M 25/0606 "Over-the-needle" catheter assemblies, e.g. I.V. catheters
• CPC Class Codes: A61M 25/0618 having means for protecting only the distal tip of the needle, e.g. a needle guard
• CPC Class Codes: A61M 25/0625 with a permanent connection to the needle hub, e.g. a guiding rail, a locking mechanism or a guard advancement mechanism
• CPC Class Codes: A61M 25/0631 : having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
• CPC Class Codes: A61M 39/045 : pre-slit to be pierced by blunt instrument
• CPC Class Codes: A61M 39/06 : Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof
• CPC Class Codes: A61M 39/0693 : including means for seal penetration
• CPC Class Codes: A61M 39/12 : for joining a flexible tube to a rigid attachment
• 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 5/158 : Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: A61M 5/3273 : freely sliding on needle shaft without connection to syringe or needle

Abstract

Catheter assemblies are generally discussed herein with particular discussions extended to catheter assemblies having a tip protector, a valve, a valve opener, and optionally a needle wiper. The valve opener is disposed inside a catheter hub and is configured to be pushed by an IV set luer connector to open a valve following successful catheterization to pass fluids or other solutions through the catheter. A tip protector is incorporated to block the needle tip and prevent the same from accidental needle stick. A wiper is optionally included to wipe blood deposits on the needle when the same is retracted from the catheter.

Claims

1. A method of wiping blood from a needle during a process of emplacing a catheter using a catheter assembly, the method comprising:

puncturing a person'"'"'s vasculature with a sharp distal tip of the needle of the catheter assembly, the needle extending distally from a first hub including a housing having an exterior surface and an interior surface defining an interior cavity;

penetrating the vasculature with the catheter of the catheter assembly, the catheter being disposed about the needle and extending distally from a second hub including a housing having an exterior surface and an interior surface defining an interior cavity, the first and second hubs releasably engaging one another;

withdrawing the needle from the vasculature while maintaining the catheter within the vasculature by disengaging the first hub from the second hub and moving the first hub proximally relative to the second hub, the proximal movement causing the needle to withdraw from the catheter; and

wiping blood from the needle as it withdraws by passing the needle through a wiper, the wiper being disposed in the second hub and having a continuous perimeter defining an opening, the perimeter being in contact with the needle for wiping the needle.

2. The method of claim 1, wherein the wiper is attached directly or indirectly to the second hub so that the wiper remains stationary as the needle is withdrawn.

3. The method of claim 1, wherein as the needle is withdrawn it passes through a hemostatic valve and a valve opener, both of which are positioned in the interior cavity of the second hub.

4. The method of claim 3, wherein the wiper is attached to the valve opener.

5. The method of claim 1, wherein as the needle is withdrawn it passes through a tip protector positioned in the interior cavity of the second hub.

6. The method of claim 5, wherein the tip protector comprises two arms that intersect.

7. The method of claim 5, wherein the tip protector comprises a first protector body surrounded by a second protector body.

8. The method of claim 5, wherein the tip protector comprises two arms that extend, at least in part, to one side of the needle.

9. The method of claim 1, wherein the wiper is liquid impermeable.

10. The method of claim 1, wherein the wiper is an O-ring.

11. A method of cleaning an exterior of a needle during a process of emplacing a catheter using a catheter assembly, the method comprising:

inserting the needle of the catheter assembly into a person'"'"'s vasculature at an access site, the needle extending distally from a proximal hub;

inserting the catheter of the catheter assembly into the vasculature at the access site, the catheter being disposed about the needle and extending distally from a distal hub, the proximal and distal hubs releasably engaging one another;

disengaging the proximal hub from the distal hub and moving the proximal hub proximally relative to the distal hub, the proximal movement drawing the needle out of the vasculature and the catheter while the catheter remains within the vasculature; and

passing the needle through a wiper as it withdraws, the wiper removing blood from the exterior of the needle, the wiper having a continuous perimeter defining an opening, the perimeter being in contact with the exterior of the needle for wiping the needle.

12. The method of claim 11, wherein the wiper is attached directly or indirectly to the distal hub so that the wiper remains stationary as the needle is withdrawn.

13. The method of claim 11, wherein as the needle is withdrawn it passes through a hemostatic valve and a valve opener, both of which are positioned in an interior cavity of the distal hub.

14. The method of claim 13, wherein the wiper is attached to the valve opener.

15. The method of claim 11, wherein as the needle is withdrawn it passes through a tip protector positioned in an interior cavity of the distal hub.

16. The method of claim 15, wherein the tip protector comprises two arms that intersect.

17. The method of claim 15, wherein the tip protector comprises a first protector body surrounded by a second protector body.

18. The method of claim 15, wherein the tip protector comprises two arms that extend, at least in part, to one side of the needle.

19. The method of claim 11, wherein the wiper is liquid impermeable.

20. The method of claim 11, wherein the wiper is an O-ring.