JPH0492668A - Nasal nutrition tube - Google Patents

Abstract

PURPOSE:To prevent the erroneous connection with an intravenous line (1VH line) for executing center vein high calory fluid therapy carrying, and also, to easily execute throwing-in of a medicine or cleaning of a catheter by providing a Y-shaped injection end, and providing a check-valve body to the side injection port in the internal cavity of an injection port. CONSTITUTION:In the main internal cavity of a Y-shaped injection end 11 provided with a side injection port 12, a check-valve 14 consisting of a rubber elastic body whose outside is fitted into the main internal cavity and which prevents a back flow to the side injection port 12 is provided. In this case, by setting a port of an injection port 2 to a catheter chip size for an ED(Element Diet) line and setting a port of the side injection port 12 to a lure size, an erroneous connection with the IVH line is prevented. Also, by existence of the check-valve body 14 of an ED liquid to the side injection port 12, even in the case a cover 13 is not closed, a liquid leakage from the side injection port 12 can be eliminated, and also, by utilizing the side injection port 12, it becomes unnecessary to remove the ED line and the injection port 2 whenever medicine giving or cleaning is executed. In such a way, a fact that an injection liquid from the injection port leaks out toward the side injection port, and the erroneous connection with the IVH line can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a nasal feeding tube used as a medical device for supplying nutrients from the nasal cavity to the small intestine via a catheter.

[Prior Art] Normally, a nasal feeding tube has a weight body sealed at the insertion end of a soft thin plastic catheter, and its weight is transferred from the nasal cavity to the stomach or into the intestine via the stomach. It is used as a medical device to supply nutrient solution from one or two side holes slightly above the weight body.

In this case, the catheter is left in place through the nasal cavity for a long period of time, causing great pain to the patient. In order to alleviate this problem, it is preferable to use a material that is as soft as possible.

Furthermore, since the catheter is in contact with the internal organ wall for a long period of time, if the material is hard, there is a risk of necrosis of the tissue of the internal organ wall, and for this reason as well, it is desirable that the catheter be made of a soft plastic tube.

FIG. 3 is a schematic partial cross-sectional view showing a conventional nasal feeding tube that has been widely used. In the figure, 1 is a nutrient solution injection end (adapter) with an injection port 2 in the center, and 3 is a lid for the injection port 2 that is used when injection of the nutrient solution is stopped or suspended. Inlet 2 at injection end 1
There is a catheter attachment part 4 on the opposite side of the catheter 5.
is inserted into and adhered to the catheter attachment part 4. The aforementioned weight body 6 is attached to the tip of the catheter 5 having a predetermined length exceeding 1 m.

In the nasal feeding tube configured as described above, the material of the catheter 5 is polyvinyl chloride (PVC), polyurethane resin (PUR), silicone rubber, etc. Among these materials, as mentioned above, The softest type was chosen. In addition, the shape of the injection port 2 is Luer size, and as mentioned above, the catheter part is inserted through the nostril and left in place so that the tip reaches the intestine, for example, and the nutrient solution is injected using the Luer size connector. I am now receiving an infusion. Incidentally, this type of nutrient solution supply system is called an enteral nutrition line or enteral line (abbreviated as ED line, an acronym for Elemental Diet). The size is such that the ED line can be directly connected to the injection end 1. In addition, when inserting the catheter 5, a stylet (not shown) made of a flexible metal wire (stranded wire) or the like is inserted into the catheter lumen along its entire length, so that the catheter 2 can be smoothly inserted into the narrow part of the body. The stylet is inserted into the tube, and when the stylet is in place, the stylet is pulled out to begin infusion.

Usually, one injection port 2 is used as in the conventional example shown in Fig. 3, or two injection ports are used with a Y-shaped injection end as seen in Japanese Patent Application Laid-Open No. 1-238865. A nasal feeding catheter is disclosed. In this document, in particular, regarding the stylet part, it appears that a highly hydrophilic polymer film is formed on at least one of the lumen surface of the introduction tube (catheter) and the surface of the stylet (referred to as a mandoline in this document). This facilitates lubrication during insertion and withdrawal of the stylet. The two Y-shaped injection ports are both Luer size, and the branch pipe side is covered with a lid when not in use to prevent liquid from flowing back.

In addition to the above, in environments where infusions are performed, in addition to the above-mentioned ED line, central venous high-calorie infusions (Intrave
Since a transvenous line (abbreviated as an IVH line) is installed to carry out a men- sion (hyperal + men non), it has been proposed to reverse the male and female insertion ends of each line to prevent incorrect connection of these two lines. ing.

[Problem to be solved by the invention] In the conventional nasal feeding tube as described above, firstly, the third
If there is no side spout, as in the conventional example shown in the figure, the ED line must be removed from the catheter several times a day to administer drugs appropriate for the patient's condition, or to clean the catheter if it becomes clogged. They had to be washed with cleaning liquid. Also, if there is no side spout,
When placing a catheter for the first time, a stylet with a stylet is usually not lubricated beforehand, so if the stylet is in its original state, remove the stylet and apply lubricant to the stylet or the catheter lumen. Preliminary work was necessary. In this case, lubricant had to be prepared separately.

Furthermore, an adapter having a Y-shaped injection end, such as the nasal feeding tube shown in JP-A-1-238865, is simply provided with a cap on the branch tube side; ) could easily come loose and there was a risk of ED fluid leaking from the injection port of the branch pipe. In addition, the connecting part between the ED line and the catheter, that is, the 2nd part of the Y-shaped adapter.
IVH
It is possible to connect the IVH line to the ED catheter, and the ED line can be connected to the IVH line terminal.
There was a high risk of misconnection as there was a possibility that it would be connected to the catheter.

This invention was made to solve the above-mentioned problems, and by making the injection end of the nasal feeding tube into a Y-shape with the size of a catheter tip and adding a side injection port, it is possible to
It is an object of the present invention to provide a nasal feeding tube that prevents erroneous connection with the H line and allows easy administration of drugs or cleaning of the catheter without removing the ED line from the catheter.

[Means for Solving the Problems] The nasal feeding tube according to the present invention has a catheter inserted through the nostril and placed in the lumen of the stomach, duodenum, and jejunum, with a Y-shaped proximal side, and an injection port and an inlet. An injection end is formed with a side spout of a different connection size from the inlet, and a backflow prevention valve body made of a rubber-like elastic body is provided to prevent backflow to the side spout provided in the main lumen of the injection port. It is something that In this case, the inlet is catheter tip sized and the side inlet is Luer sized. In a nasal feeding tube using a stylet, a stylet coated with a water-activated lubricant is inserted into the catheter lumen through an injection port. This insertion method may include applying a water-activated lubricant to the lumen of the catheter and inserting the stylet therein.

[Function] In this invention, the injection end on the proximal side of the catheter is made up of an injection port and a side injection port with a different connection size.
It is shaped like a letter and is equipped with a backflow prevention valve made of a tubular rubber-like elastic body inside the main lumen of the injection port, which prevents the injected liquid from leaking into the side injection port. Ru. In addition, the injection port is catheter-sized and the side injection port is Luer-sized, which prevents incorrect connection with the IVI line.Also, the side injection port allows lubricant to be injected without having to remove the stylet. Furthermore, since a water-activated lubricant is applied to the stylet or catheter lumen, lubricity can be imparted to the catheter or stylet by injecting water or saline.

[Example] FIG. 1 is a schematic partial sectional view showing an example of a nasal feeding tube according to the present invention. 2 is a partially enlarged view of the Y-shaped injection end of the embodiment shown in FIG.
) is a sectional view, (b) is a side view, and (C) is a top view.

In FIGS. 1 and 2, numerals 2 to 6 indicate the same or equivalent parts as those used in the explanation of the conventional example in FIG.

In the figure, 11 is a Y-shaped injection end, 12 is a side injection port provided in a T-shape on the side wall of the injection port 2 and communicated with the main lumen of the injection port 2, and 13 is the side injection port. It's a lid.

Here, the injection port 2 and the side injection port 12 are ports (tube connection ports) of different sizes, for example, the port of the injection port 2 is a catheter tip size, and the side injection port I2 is a Luer size. Furthermore, 14 is a backflow prevention valve body made of a rubber elastic body whose outer side fits into the main lumen of the Y-shaped injection end 11 provided with the side spout 12 and prevents backflow to the side spout 12. It is. Furthermore, the adapter 16 forming the outer frame of the injection port 2 into which the lid 3 is fitted is square-shaped as shown in FIG. 2(C). In this embodiment, the catheter 5 is made of Nismezoica (trademark of Sekisui Chemical Co., Ltd.: Nismezoica VH), which is a non-plasticized soft vinyl chloride compound, and has a softness that does not give the patient a foreign body sensation and does not cause deformation such as kinking. It is made of a material that has elasticity. In addition, as shown in FIG. 1, for example, in a nasal feeding tube of the type in which the stylet 15 is already inserted into the entire lumen of the catheter 5 at the time of shipment, a water-activating tube is added to the inner surface of the catheter 5 or the stylet 15. It is designed to apply lubricant.

The functions and effective features of the nasal feeding tube according to the present invention having the above configuration will be explained below. By making the port of the inlet 2 a catheter tip size for an ED line and the port of the side inlet 12 a Luer size, it is possible to prevent incorrect connection with the IVH line. Also,
In this case, since the adapter 16 of the injection port 2 has a rectangular shape, it can be easily recognized by the touch that it is an ED line adapter. Due to the presence of the backflow prevention valve body 14 for the ED liquid to the side spout 12, it is possible to eliminate liquid leakage from the side spout 12 even when the lid 13 is not closed, and the side spout 12 can be used. It is no longer necessary to remove the ED line and inlet 2 every time when administering medication or cleaning.
And without removing the stylet 15 from the side spout 12,
Lubricant can be injected from this part.

In addition, in this embodiment, Nismezoica is used for the catheter 5, which gives the patient a softness that does not give the patient the feeling of a foreign body, and since this material has appropriate elasticity, it does not easily kink when inserted into the body. It has the advantage that it can be used safely even after long-term indwelling with very little deterioration in physical properties.

Furthermore, since water-activated lubricant is applied to the inner lumen of the stylet 15 and/' or the catheter 5, simply injecting water or saline into the catheter and stylet will It is possible to provide them with lubricity, making operations extremely easy, especially in the preparatory stage prior to the actual operation of nutritional supplementation using a nasal feeding tube.

[Effects of the Invention] As described above, according to the present invention, a Y-shaped end portion consisting of an inlet and a side inlet is formed, and the backflow prevention valve body for the toning port side is inserted into the inner cavity of the inlet. Since the ports for the inlet and the side inlet are provided with different connection sizes, the injected liquid from the inlet will not leak out from the side inlet, and the ED line to the inlet and We can provide lightweight and heavy feeding tubes that can prevent incorrect connection of IVH lines.

In addition, with nasal feeding tubes that use stylets,
Since water-activated lubricant is applied to the stylet or catheter lumen, it is easy to lubricate the catheter stylet by simply pouring water or saline during use. Preparatory operations prior to the main operation of setting a nasal feeding tube and infusing nutrients can be performed easily and reliably.

[Brief explanation of the drawing]

Fig. 1 is a schematic partial cross-sectional view showing an embodiment of the present invention, Fig. 2 is a partially enlarged view of the Y-shaped injection end of Fig. 1, and Fig. 3 is a schematic partial cross-sectional view of a conventional nasal feeding tube. It is. In the figure, 1 is the injection end, 2 is the injection port, 3 is the lid, 4 is the catheter attachment part, 5 is the catheter, 6 is the weight body, 11
12 is a Y-shaped injection end, 12 is a side spout, 13 is a lid, 14 is a check valve body, 15 is a stylet, and 16 is an adapter.

Claims (3)

[Claims] (1) The catheter, which is inserted through the nostril and placed in the lumen of the stomach, duodenum, and jejunum, has a Y-shaped injection end on the proximal side consisting of an injection port and a side injection port with a different connection size from this injection port. A nasal feeding tube characterized in that a backflow prevention valve body to the side inlet is provided in the lumen of the inlet. (2) The nasal feeding tube according to claim 1, wherein the injection port is formed in the size of a catheter tip, and the side injection port is formed in the size of a Luer. (3) Claim 1 characterized in that a stylet coated with water-activated lubricant is inserted into the catheter lumen through the injection port.
Nasal feeding tube as described.