JPH0337637Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a catheter for nasal insertion, and is primarily a catheter for nasal insertion into the gastrointestinal tract.

(Prior art) Nasal insertion catheters for nutritional supplementation are usually made of soft, thin plastic and have a weight enclosed in the insertion end. The nutrient solution is supplied through one or two side holes slightly above the weight body.

Catheters are indwelled through the nasal cavity for long periods of time, which is extremely painful for patients. In order to alleviate this problem, it is preferable that the catheter be made of as soft a material as possible.Also, since the catheter will be in contact with the visceral wall for a long period of time, if the material is hard, there is a risk that the tissue of the visceral wall will become necrotic. It is also preferable that the tube be made of soft plastic tube.

However, in order to insert these soft tubes into the stomach and intestines, which have large curvatures, they must be passed through the nasal cavity, past the narrow passageway of the larynx, and then through the esophagus, making it difficult to insert catheters made from soft plastic tubes because they are weak. It is.

For this reason, the conventional method has been to insert the guide wire into the lumen of the catheter and strengthen the stiffness. It took time and effort to apply lubricant to the inner surface of the catheter, and furthermore, inserting the guidewire itself was troublesome. Furthermore, during insertion, there was a risk that the tip of the guide wire would protrude from the side hole of the catheter and pierce the internal organ wall.

(Purpose of the invention) This invention was made to eliminate the above-mentioned drawbacks, and it is possible to insert it from the nostril with peace of mind, but it is impossible to perform such an insertion by one person. The purpose of this invention is to provide a catheter for nasal insertion that can be easily and reliably performed.

(Structure of the device) First, in order to achieve the above object, the entire catheter is slidably fitted into a plastic sheath tube that has a longitudinal tear line along its entire length and has slightly greater elasticity and rigidity than the catheter. and a plastic separator for tearing the sheath tube of the nasal insertion tube into which the tube is loosely fitted near the nasal cavity. The outer tube allows the tube to pass through with a sufficient margin, and the two tubes are fixed closed at one end, and an opening space is provided on the upper surface of the outer tube for drawing out the sheath tube. This separator can be inserted and removed by providing a notch in the axial direction from the top to the center line, or by dividing the separator into two horizontally and providing a fitting protrusion that elastically fits into each divided surface and a corresponding fitting hole. It was designed to be freely integrated.

(Example) FIG. 1 is an external explanatory diagram showing an example of the present invention. Reference numeral 1 is a soft plastic catheter, and 2 is a sheath tube, which is a plastic tube with slightly greater elasticity and rigidity than the catheter, and has tear lines 3 running longitudinally along its entire length. The tear line 3 is formed by integrating something different from the sheath tube 2, or by molding the tear line 3 to have a much thinner wall thickness than the other parts. Further, the number of tear lines is not limited to one. However, it is preferable that only a very small portion (10 below) of the distal end portion of the catheter has no tear line.

The present invention requires that this tear line be provided in advance, but when using a sheath pipe without a tear line, a cutter is attached to the separator, and this is used to simultaneously pull up the sheath pipe. It is also possible to make the tearing possible. In this way, the nasal insertion tube A has the catheter 1 passed through the sheath tube 2.
B is a separator made of hard plastic that is molded into a hard plastic when set near the nasal cavity, and has an inner tube 4 through which the catheter 1 can be slidably passed, and an outer tube 4 through which the sheath tube 2, which is located concentrically on the outer periphery, can be passed with sufficient margin. There is a tube 5, and there is a closing fixing part 6 that closes the gap between the two at one end.The outer tube 5 consists of a large diameter part and a small diameter part continuous to the large diameter part, and the closing fixing part 6 is arranged on the small diameter part side. At the same time as the small diameter part is cut 7 with a surface sloping from top to bottom toward the part 6 side, the upper part of the closing fixing part 6 is also cut with a surface sloping from above toward the opening (large diameter part) of the outer tube. an opening space 9 between the inner tube 4 and the outer tube 5 made by
is formed.

(Function) In such a separator B, first, before passing the nasal insertion tube A into the outer tube 5 in the direction of the arrow, tear the sheath tube 2 a little and pass the catheter 1 through the inner tube 4 to the outside of the separator B. The sheath tube 2 which has been pulled out and torn as shown in FIG. As this withdrawal continues, all of the sheath tube 2 is pulled out through this separator B, and the catheter 1 remains in the gastrointestinal tract.

FIG. 2 is an explanatory diagram showing a cross section in this case.

FIG. 3 is an external view of this separator. Further, FIG. 4 is a cross-sectional view taken along line XX in FIG. 3, and FIG. 5 is a cross-sectional view taken along line Y-Y in FIG. Also, Figure 6 shows the catheter 1.
In the explanatory diagram, a is a weight body part, and b is a side hole which is a nutrient solution supply hole. c is the attachment part of the pipe from the nutrition bottle. FIG. 7 is an enlarged view of the distal end of the catheter 1 with the sheath tube 2, and it is preferable that the tear line 3 of the sheath tube 2 has a portion 10 without a tear portion at the distal end.

Fig. 8 shows another embodiment of the present invention, in which a notch 11 is provided along the axis from the top of the separator B, and Fig. 9 shows that the separator B is horizontally divided into two parts, each with a dividing surface. projection 12,
12 and the insertion holes 12', 12' of this protrusion so that they can be attached and detached together, and the nasal insertion tube A can be taken out or inserted from there.

(Effects) Since the present invention has such a configuration, if the nasal insertion tube A is set in this separator B, the sheath tube does not have a tear line, so the sheath tube can be pulled out and the catheter inserted into the internal organs. Two hands were required to set it up, but with the nasal insertion catheter of the present invention, one hand can pull out the sheath tube through the separator and leave the catheter in the internal organ.

The present invention has the above-mentioned structure, and its function is as described above. When the catheter is placed in the internal organs, the nasal insertion catheter 1 can be completely pulled up from the internal organs by simply tearing the sheath tube 2 with the separator. What's more, this separator can be placed in the nasal cavity and carried out by one person, whereas conventional methods required two hands.The sheath tube has greater elasticity and rigidity than a catheter, so it can be easily inserted into the gastrointestinal tract. This can be done extremely quickly, and the sheath tube can be pulled out smoothly and quickly, causing almost no pain to the patient.The sheath tube and separator can be easily molded from plastic, so they can be supplied at low cost.

[Brief explanation of the drawing]

Fig. 1 is an explanatory view of the external appearance of the nasal insertion catheter of the present invention, Fig. 2 is an explanatory cross-sectional view thereof, Fig. 3 is an external view of the separator, Fig. 4 is a cross-sectional view taken along line XX in Fig. 3, and Fig. 5 The figure is a YY cross-sectional view of FIG. 3, FIG. 6 is an explanatory diagram of the catheter, FIG. 7 is an enlarged explanatory diagram including the sheath tube at the distal end of the catheter, and FIG. 8 is an example of the separator. FIG. 9 is a cross-sectional explanatory view of another embodiment of the separator. A... Nasal insertion tube (consisting of a catheter and sheath tube), B... Separator, 1... Catheter, 2... Sheath tube, 3... Tear line, 4...
Inner tube of the separator, 5... Outer tube of the separator, 6... Closing fixing part filling between the inner tube and outer tube of the separator, 7... Inclined cut surface of the separator outer tube, 8... Closing fixing part of the separator Inclined cutting surface, 9... Opening space between both of the above cutting surfaces, 10
... Part of the sheath tube without a tear line, 11 ... Notch from the top of the separator, 12 ... Fitting projection, 12'... Fitting hole, a... Catheter weight body part,
b... Side hole, c... Attachment part to the pipe from the feeding bottle of the catheter.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The entire catheter 1 is slidably fitted into a plastic sheath tube 2 which has a vertical tear line 3 over its entire length and has slightly greater elasticity and rigidity than the catheter 1. It consists of a nasal insertion tube A, which is loosely fitted near the nasal cavity, and a plastic separator B for tearing the sheath tube 2 of the nasal insertion tube A, and the separator B allows the catheter 1 to be freely passed through. The inner tube 4 is fixed at one end in an outer tube 5 through which the sheath tube 2 passes with a sufficient margin, and a hole is provided on the upper surface of the outer tube 5 for drawing out the sheath tube 2. A transnasal insertion catheter characterized by being provided with an opening space 9. (2) Nasal insertion according to claim 1 of the utility model registration claim, characterized in that the separator B has a notch 11 at the top thereof extending through the inner tube 4 and outer tube 5 in the axial direction of the pipe. catheter. (3) The separator B is divided horizontally into two parts in the axial direction, and has a plurality of fitting protrusions 12 that elastically fit into each divided surface, and corresponding fitting holes 12'. A catheter for nasal insertion according to claim 1 of the utility model registration claim.