Indwelling catheter set

• US 20040204691A1
• Filed: 04/07/2004
• Published: 10/14/2004
• Est. Priority Date: 04/08/2003
• Status: Active Grant

• Current Assignee: Nipro Corporation
• Original Assignee: Nipro Corporation
• Inventors: Yano, Tsuyoshi, Yashiro, Kenji, Higaki, Yoshio
• Granted Patent: US 7,318,818 B2
• Time in Patent Office: Days
• US Class Current: 604/257
• CPC Class Codes: A61M 2005/1587 suitable for being connected to an infusion line after insertion into a patient
• CPC Class Codes: A61M 25/0097 characterised by the hub connectors A61M39/10
• CPC Class Codes: A61M 25/0606 "Over-the-needle" catheter assemblies, e.g. I.V. catheters
• CPC Class Codes: A61M 39/1011 Locking means for securing connection; Additional tamper safeties A61M39/16 takes precedence
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Abstract

An indwelling catheter set comprises a cannula housing. The cannula housing comprises: (a) a catheter disposed substantially in the axial direction and formed into a hollow body opened at its distal and proximal ends; and (b) a catheter hub comprising a through bore extending substantially in the axial direction for inserting the proximal portion of the catheter therethrough. The catheter is adhered or welded to the catheter hub.

Claims

1. An indwelling catheter set comprising a cannula housing,

the cannula housing comprising:

(a) a catheter disposed substantially in the axial direction and formed into a hollow body opened at its distal and proximal ends; and

(b) a catheter hub comprising a through bore extending substantially in the axial direction for inserting a proximal portion of the catheter therethrough,

wherein the catheter is adhered or welded to the catheter hub.

2. An indwelling catheter set according to claim 1, wherein the catheter and the catheter hub are formed of the same plastic material by injection molding.

3. An indwelling catheter set according to claim 1, wherein the outer surface of the catheter is roughened by surface processing.

4. An indwelling catheter set according to claim 1, wherein a proximal end portion of the catheter is flared so as to be enlarged toward its proximal end.

5. An indwelling catheter set comprising:

(a) the cannula housing according to claim 1;

and

(b) an insertion hub and an infusion hub to be detachably connected to the cannula housing, respectively,

the insertion hub comprising;

(a) an insertion needle disposed substantially in the axial direction and formed into a hollow body opened at its distal and proximal ends, the insertion needle being detachably inserted into a plug and the catheter from proximal ends thereof when connecting the insertion hub and the cannula housing; and

(b) an insertion needle hub provided at a proximal portion of the insertion needle, the insertion needle hub being detachably connected to the catheter hub from its proximal end when connecting the insertion hub and the cannula housing,

the infusion hub comprising;

(a) an infusion needle for feeding liquid disposed substantially in the axial direction and formed into a hollow body opened at its distal and proximal ends, the infusion needle being detachably inserted into the plug from its proximal end, when connecting the infusion hub and the cannula housing, so as to communicate with the catheter; and

(b) an infusion tubing hub provided at a proximal portion of the infusion needle, the infusion tubing hub being detachably connected to the catheter hub from its proximal end when connecting the infusion hub and the cannula housing.

6. An indwelling catheter set according to claim 5, wherein a proximal portion of the through bore is formed as a connecting port for feeding liquid,

and wherein the plug formed of resilient material for sealing the connecting port is inserted into the connecting port from its proximal end,

a guide being inserted into a portion of the connecting port, which is disposed proximally of the plug,

the guide being formed into a hollow body opened at its distal and proximal ends for preventing the plug from dropping off the connecting port,

the guide allowing detachable insertion of the insertion needle and the infusion needle from proximal ends thereof,

at least a proximal portion of the interior of the guide being formed into a tapered bore tapered toward the distal end of the guide,

at least the proximal portion of the interior of the guide having an inner surface for guiding the insertion needle and the infusion needle to a substantially axial center of the connecting port.

7. An indwelling catheter set according to claim 6, wherein the guide comprises in the interior:

(a) a straight bore forming a distal portion of the interior of the guide, the straight bore having an inner diameter substantially constant in the axial direction; and

(b) the tapered bore forming the proximal portion of the interior of the guide.