JPH0316681Y2 - - Google Patents

Description

[Detailed explanation of the invention] (1) Industrial application field This invention relates to medical catheters.

(2) Conventional technology Conventionally, for example, when aspirating the intestinal contents of a patient with intestinal obstruction or injecting a medicinal solution, a catheter 1 made of silicone, natural rubber, or PVC and having a flexible structure as a whole is used, as shown in Fig. 2. ing.
This catheter 1 has a length of approximately 250cm and a diameter of 6Fr.
~26 Fr, and on its distal end side, a plurality of ceramic balls 2 serving as a closing member having a predetermined weight for closing the distal opening are arranged in series and covered with a resin sheet 3. . The ceramic balls 2 are provided to add a predetermined weight to the tip of the catheter 1 and to make it easier to insert the catheter 1 into the body from the tip. It is also arranged in a way that maintains flexibility. A balloon 5 is provided on the catheter 1 near the ceramic bulb 2, and this balloon 5 is connected to an air inlet tube 6 provided at the proximal end of the catheter 1 through an axial hole (not shown) provided in the peripheral wall of the catheter 1. It is communicated with. Reference numeral 7 denotes a guide wire, which is inserted into the catheter 1 as shown in the figure when the catheter 1 is inserted.

(3) Problems to be solved by the invention By the way, in the case of catheter 1 as described above,
This is a type that is inserted into the body with the guide wire 7 placed inside the catheter 1, and although the tip is weighted with a ceramic ball 2 to make insertion easier, the diameter of the catheter 1 itself Therefore, when the tip of the catheter comes close to the pylorus between the stomach and duodenum, it stops at the pylorus and cannot pass through the catheter properly, resulting in the problem that it takes time to insert the catheter 1 into the duodenum. .

Therefore, the technical problem of this invention is to enable the tip of the catheter to pass through the pylorus smoothly and quickly.

(4) Means for Solving the Problems In order to achieve the above-mentioned technical problem, this invention provides the above-mentioned medical catheter with an axial through-hole large enough to allow the guide wire to pass through the occluding member. It is characterized by:

(5) Effect To insert a catheter, first insert only the guide wire into the body. When the tip of the guide wire reaches the treatment site, insert the tip opening of the catheter from the rear end of the guide wire.
The catheter is inserted into the body along the guide wire. When the tip of the catheter reaches the treatment site, the guidewire is removed, leaving only the catheter inserted into the body, and the necessary treatment is performed. As mentioned above, the catheter is inserted into the body along the guide wire, so even if its tip is located near the pylorus, it will be guided by the guide wire and will pass through there quickly and smoothly, unlike conventional catheters. There are very few cases where it stops.

(6) Embodiment FIG. 1 is an enlarged view of a portion corresponding to the distal end of the conventional catheter 1, showing an embodiment of this invention. 12 are positioned at predetermined intervals and arranged in series. The ring 12 can be made of any metal as long as it is suitable for medical use.
Further, it does not necessarily have to be made of metal as long as it can give a predetermined weight to the distal end of the catheter 11 for easy insertion. The reason why they are spaced apart is to ensure the flexibility of the tip.

Catheter 11 with such a ring 12
By using the catheter 11, it is not necessary to insert the catheter 11 together with the guide wire 7 as in the conventional case, and in this embodiment, the catheter 11 is inserted as follows.

That is, first, only the guide wire 7 is inserted in advance from the patient's nasal passage into the oropharynx, and then from the stomach through the pylorus and into the duodenum. Since the guide wire 7 is extremely thinner than the catheter 11 and is made of a flexible material, its tip can easily reach the duodenum.

When the tip of the guide wire 7 reaches and enters the duodenum, the tip opening 14 of the catheter 11 with the air removed from the balloon 5 is inserted from the rear end side of the guide wire 7, and the guide wire 7 is inserted into the ring 12. The catheter 11 is inserted into the body along the wire 7 so as to pass through the hole 13 of the catheter. Since the tip of the catheter 11 is weighted by a ring 12, insertion is extremely smooth, and even when the tip comes close to the pylorus, it passes through the pylorus without difficulty, and the tip of the catheter 11 enters the duodenum. . After the tip enters the duodenum, air is injected into the balloon 5 to inflate it.
The tip of the catheter 11 is carried to the intestinal tract by intestinal peristalsis, and is used for suctioning intestinal contents and injecting medicinal solutions. At this time, the guide wire 7 is of course removed.

In the embodiment, a ring 12 is provided to pass the guide wire 7, but a conventional ceramic ball 2 is provided.
This does not preclude the provision of an axial through hole in which the wire 7 is passed through the through hole, and the detailed design can be changed in various ways without changing the gist of the invention.

(7) Effects of the device This device is as described above, and the catheter can be inserted into the body along the guide wire through the through hole of the occluding member provided at the tip. The catheter can be passed extremely smoothly and quickly, and has the excellent effect of efficiently inserting the catheter into the body in a short time.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view of the distal end of a catheter showing an embodiment of this invention, and FIG. 2 is a partially cutaway front view of a conventional catheter. 11...catheter, 2...metal ring.

Claims (1)

[Scope of utility model registration request] A medical catheter that is provided with a occlusion member having a predetermined weight that closes a distal opening, and that has a flexible structure as a whole including the distal end portion where the occlusion member is located, in which a guide wire can be inserted through the occlusion member. A medical catheter characterized by being provided with an axial through hole of the same size.