JPH0572834B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Object of the Invention [Field of Industrial Application] The present invention relates to a catheter needle tube assembly with a protector that can easily hide the needle tip of the needle tube assembly after use.

[Prior Art] Figure 3 shows a conventional catheter needle tube assembly.

A conventional catheter needle tube assembly consists of a catheter assembly A and a needle tube assembly B. The catheter assembly A consists of a catheter 1 and a catheter hub 2, and the needle tube assembly B consists of a needle tube 3 and a needle tube hub 4. Inner diameter of catheter 1 and needle tube 3
have the same outer diameter and are relatively slidable. The sharp tip 3a of the needle tube 3 protrudes beyond the sharp tip 1a of the catheter 1. The device is provided housed in a case body K1 and a cap K2.

The catheter needle tube assembly taken out from the case is
It is used as it is, and the blood vessel at a desired part of the human body is held and punctured with the sharp tip 3a of the needle tube 3.

Next, while supporting the needle tube assembly B so that it does not move, the catheter assembly A is slid forward to allow the catheter tip 1a to enter the blood vessel.

Subsequently, the catheter assembly A is supported so as not to move, and the needle tube assembly B is pulled out and discarded.

[Problems to be Solved by the Invention] However, the needle tube assembly B must be disposed of with one hand because one hand must be holding the catheter assembly A, and furthermore, the needle tube assembly B must be disposed of with one hand. After pulling out the solid body B, the tube must be quickly connected to the catheter assembly A and the guide wire must be introduced, so that it must also be disposed of quickly.

If the needle tube assembly B is disposed of with the sharp tip 3a of the needle tube 3 exposed, there is a risk that a medical assistant or waste handler may prick their finger with the needle tip during the disposal process. However, there is a risk of infection such as AIDS and hepatitis, and it is necessary to hide the tip 3a before disposing of it. However, conventionally, no protector is provided to hide the sharp tip 3a of the needle tube 3. Furthermore, even if there is a protector that covers the tips of the catheter 1 and the needle tube 3 when the catheter assembly A and the needle tube assembly B are combined, in addition to the case body K1 and the cap K2, the protector It is absolutely impossible to use it to cover the tip 3a of the needle tube 3 of the needle tube assembly B after use.

Conventionally, the used needle tube assembly B was housed in the case body K1 and covered with the cap K2, which was very troublesome.

Furthermore, when housing the needle tube assembly B in the case body K1, the case K1 may roll and be difficult to insert, or it may roll and fall from the table onto the floor.

An object of the present invention is to provide a catheter needle tube assembly with a protector that can easily hide the needle tip of the needle tube assembly after use.

Another object of the present invention is to provide a catheter needle tube assembly in which the needle of the needle retainer assembly after use can be easily stored in the protector without the risk of pricking a finger or the like.

(2) Structure of the Invention [Means for Solving the Problems] As shown in FIG. a catheter assembly A, a needle tube 3 which is inserted into the catheter 1 through the catheter hub 2, has a sharp tip 3a projecting forward beyond the catheter 1, and has an outer diameter smaller than the inner diameter of the catheter; and the needle tube 3. a needle tube assembly B consisting of a needle tube hub 4 that holds the proximal end of the needle tube; , a small diameter cylindrical portion 5 having a sharp tip 5a protruding further than the sharp tip 1a of the catheter 1, and a large diameter cylindrical portion 6 connected to the proximal end of the small diameter cylindrical portion 5, the large diameter The large diameter cylindrical portion 6 has a distal end outer surface 6a removably fitted into the inner surface 2a of the catheter hub 2, and an inner surface 6b slidably fitted onto the needle tube hub 4. This is achieved by a catheter needle tube assembly characterized by comprising a protector C consisting of:

[Function] In the catheter needle tube assembly of the present invention, the tip 3a of the needle tube 3 of the needle tube assembly B is retracted from the catheter tip 1a of the catheter assembly A, and is housed in a conventional case similar to that shown in FIG. provided. The catheter needle tube assembly taken out from the case is used in the state shown in FIG. 1, holding a blood vessel in a desired part of the human body and puncturing it with the sharp tip 3a of the needle tube 3.

Alternatively, the needle may be housed in the case in the state shown in FIG. 1 from the beginning, and in this case, the needle can be punctured as is.

Next, while supporting the needle tube assembly B so that it does not move, the protector C is slid forward, whereby the small diameter portion tip 5a of the protector C
Then, the catheter tip 1a of the catheter assembly A is inserted into the blood vessel.

Next, while supporting the catheter assembly A so that it does not move, the protector C is grasped and pulled out. Then, the needle tube assembly B can also be pulled out together.

Next, as for processing the needle tube assembly B having the sharp tip 3a, since the sharp tip 3a of the needle tube 3 protrudes from the tip 5a of the small diameter cylindrical portion 5 of the protector C, while still holding the protector C, hold the needle tube The sharp tip 3a of 3 is the tip 5 of protector C.
Move the needle tube assembly B in the pulling direction so as to pull it in from a. In this way, protector C
The sharp tip 3a of the needle tube 3 is stored in the needle tube 3, and the needle tube 3 can be disposed of in this state without the risk of pricking a finger or the like during subsequent handling.

Note that the catheter assembly A placed in a punctured state in a blood vessel is connected to a tube (not shown) or a guide wire is passed therethrough.

[Example...FIGS. 1 and 2] In the catheter needle tube assembly of this embodiment, a slit 7 extending in the axial direction is provided in the large diameter cylindrical portion 6 of the protector C, and the needle tube is inserted through the slit 7. A gripping portion 8 protrudes from the outer surface of the needle tube hub 4 of the assembly B. Therefore, by operating the gripping part 8, the tip 3a of the needle tube 3 is retracted and housed in the catheter. The grip portion 8 on the outer surface of the needle tube hub 4 is provided on the side corresponding to the cut surface of the cutting edge 3a of the needle tube 3. Therefore, when the catheter needle tube assembly is held in the palm of the hand with the tip facing forward and the gripping part 8 facing upward, the gripping part 8 can be moved with the thumb, and the needle tip 3a can be stored with one hand. Easy to operate.

Furthermore, the slit 7 of this embodiment has a passage part 7a that fits slightly tightly into the grip part 8 and allows the grip part 8 to pass therethrough, and a passage part 7a that is located in front and back positions sandwiching the passage part 7a. Two loosely fitting locking parts 7
b, 7c, and the axial position of the protector C can be fixed in a position where the cutting edge 3a is slightly inserted into the protector C and exposed for a predetermined length.

Furthermore, in this embodiment, there is a ring 9 inside the tip of the large diameter cylindrical portion 6 of the protector C, and the needle tube 3 is inserted through the ring 9, and the catheter C 2 and the large diameter cylindrical portion 6 of the protector C are provided with a ring 9. The distal end of the needle tube 3 and the needle tube 3 are kept integrally fitted together.

(3) Effects of the invention As described above, the catheter needle tube assembly of the present invention forms a gap between the catheter and the needle tube, and also forms a gap between the catheter hub and the needle tube hub, so that the catheter needle tube assembly of the present invention has the following features: The structure is such that the protector is formed to fill the gap and is fitted to the catheter assembly and needle tube assembly, so after the puncture, the protector is pulled out, the needle tube assembly is pulled out as a whole, and then the protector is attached to the protector. By slightly moving the needle tube assembly in the proximal direction, the needle tip of the needle tube assembly can be hidden within the protector. A three-dimensional structure can be provided, and the storing operation when storing the needle of the needle tube assembly after use into the protector can be easily performed without the risk of pricking a finger or the like.

Further, the operation of storing the needle of the needle tube assembly into the protector after use can be easily performed without the risk of pricking a finger or the like.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of an embodiment of the catheter needle tube assembly of the present invention, and FIG. 2 shows the needle tip attached to the protector after the needle tube assembly of FIG. 1 is pulled out from the catheter assembly together with the protector. FIG. 3 is a longitudinal sectional view of the device in a state where it can be retracted and disposed of. FIG. 3 is a longitudinal sectional front view of a conventional catheter needle tube assembly housed in a case. A...Catheter needle tube assembly, 1...Catheter,
1a...Tip, 2...Catheter hub, 2a...Inner surface, B...Needle tube assembly, 3...Needle tube, 3a...Tip, 4
...Needle tube hub, C...Protector, 5...Small diameter cylindrical portion, 5a...Tip, 6...Large diameter cylindrical portion, 6a...Tip outer surface, 6b...Inner surface, 7...Slit, 8...Gripping portion.

Claims (1)

[Scope of Claims] 1. A catheter assembly consisting of a catheter having a sharp tip and a catheter hub that holds the proximal end of the catheter, and a catheter assembly having a sharp tip that is inserted into the catheter through the catheter hub and protrudes beyond the catheter. a needle tube assembly comprising a needle tube having a diameter smaller than the inner diameter of the catheter, and a needle hub for holding the proximal end of the needle tube; a small diameter portion having a sharp tip that fills the gap between the catheter and the outer diameter of the needle tube and protrudes further than the sharp tip of the catheter, and a large diameter portion connected to the proximal end of the small diameter portion, The outer surface of the distal end of the large diameter portion is removably fitted into the inner surface of the catheter hub, and
A catheter needle tube assembly comprising: a protector having an inner surface formed of the large diameter portion slidably fitted onto the needle tube hub. 2. A gripping portion provided on the outer surface of the needle tube hub of the needle tube assembly protrudes through a slit formed in the large diameter portion of the protector, and when the gripping portion is moved toward the proximal end, the needle tube 2. The catheter needle tube assembly according to claim 1, wherein the distal end of the catheter needle tube assembly is configured to be housed within the catheter by retracting the tip thereof.