JP2001333985A - Nasal cavity guiding tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a very useful nasal cavity guiding tube by which inserting from nose and guiding from nose to mouth of the nasal cavity guiding tube is easily performed, insertion error into the direction of the esophagus in the case of inserting the tube is prevented, and the end is easily guided in to oral cavity by inserting the tube. SOLUTION: The nasal cavity guiding tube is used when a catheter is guided from oral cavity to nasal cavity and the tube or rod shaped catheter has nasal cavity guiding part at one end. The nasal cavity guiding part is characterized by having three continuous curves of the front end, intermediate part, and back end. The nasal cavity guiding part has radius of 5-20 mm curve at the end, radius of 40-60 mm curve at the intermediate part, and radius of 20-40 mm curve at the back end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nasal guide tube used for guiding a catheter from the oral cavity to the nasal cavity.

[0002]

2. Description of the Related Art In order to indwell medical devices such as a guide wire, an ileus tube, an endoscopic nasal pancreaticobiliary drainage, etc., which are inserted through the mouth using an endoscope, intranasally,
A method of pulling these out of the nose through the lumen of a Neraton catheter inserted into the oral cavity from the nose, or connecting them to the Neraton catheter by some method and indwelling them nasally has been used. In the method of directly transnasally inserting a catheter and a tube to be placed in the body using a guide wire, the route from the mouth to the pylorus of the stomach has a large bending, and the catheter easily forms a loop especially in the stomach, It is difficult to insert the catheter simply by pushing it through the mouth with the guide wire. Further, in order to push the catheter inserted from the nose in the intended direction, the catheter is taken in and out, but there is a problem that the nasal mucosa of the patient is damaged and nasal pain is caused. Therefore, a method has been used in which a catheter, a tube, and the like are placed orally using an endoscope, and then placed in a nasal manner using a Neraton catheter or the like.

At present, a conventional Neraton catheter is inserted through the nose, and when the Neraton catheter tip is seen above the pharynx, the Neraton catheter tip is pulled out of the mouth using a laryngoscope, forceps, tweezers, or the like. But,
With this current method, the tube has no so-called “stiffness” (rigidity), so it is not only difficult to push it into the nose,
In drawing out from the mouth, it was troublesome to search for and grasp the tip of the Neraton catheter located at the upper part of the larynx using a laryngoscope, forceps, tweezers, and the like.

[0004]

SUMMARY OF THE INVENTION The present invention was made as a result of various studies to solve such a problem of a nasal cavity guiding tube used for guiding from the oral cavity to the nasal cavity. The present invention provides a nasal cavity guiding tube that can be easily inserted into the oral cavity from the nasal cavity by pushing the tube out of the nasal cavity by preventing the nasal cavity guiding tube from being easily pushed in from the nose, preventing the tube tip from being erroneously inserted into the esophagus, and pushing the tube out of the nose. Things.

[0005]

That is, the present invention relates to a nasal guide tube used for guiding a catheter from the oral cavity to the nasal cavity, which is a tube or a rod-shaped catheter having a nasal guide portion at one end. The guiding portion is a nasal cavity guiding tube having three continuous curved portions including a front end portion, an intermediate portion, and a rear end portion.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing the structure of a nasal cavity guiding tube according to one embodiment of the present invention, and FIGS. 2 (a) and 2 (b).
1 shows an enlarged view of the tip portion in FIG.

[0007] The nasal cavity guiding tube according to the present invention is a tube (1) having a maximum outer diameter at the center and tapered at both ends, and is inserted into the tube lumen so that the tube (1) can be shaped into a shape along the upper part of the nasal cavity. A fixed stylet (2), a tip (3) that prevents misinsertion into the esophagus and can easily guide the tip into the oral cavity by pushing the tube, easily from the nasal cavity to the upper pharynx An intermediate part (4) and a rear end part (5) having an insertable curved part,
A sealing portion (6) for fixing the stylet (2) and protecting the cut end of the tube, and a cutting marking (a cut-off mark indicating the cut position of the nasal guide tube for connection to or insertion into the nasal guide tube ( 7).

The tube (1) is inserted into the nose from the distal end (3), pulled out until the cutting marking (7) comes out of the oral cavity, and cut by the cutting marking (7). Thereafter, the guide wire, the tube and the catheter in the oral cavity are connected to the nasal guide tube in some way, or the tube and the catheter to be inserted into the tube and placed in the nasal cavity are withdrawn from the nose. Therefore, the overall length of the tube (1) is not particularly limited, but is preferably 600 to 1000 mm. If the length is too short, the nasal guide tube cannot be pulled out until the cutting marking (6) appears outside the oral cavity. If it is too long, it becomes difficult to use a nasal guide tube. Tube (1) is made of polyvinyl chloride resin (hardness (Shore A)
59-92), a synthetic resin such as a polyurethane resin, a polyolefin-based elastomer, or a silicone rubber, or a combination of two or more of these resins. The shape of the tube (1) is not particularly limited, but it is tapered in consideration of the ease of insertion into the nasal cavity, connection with the tube and catheter in the oral cavity by some method, or insertion into the tube (1). Is preferred. The inner diameter at the distal end is preferably narrower in consideration of the patient's QOL. However, making the tip of the tube (1) thinner reduces the bending rigidity of the tube (1) at the time of insertion of the tube (1) into the nose, making it difficult to insert the tube (1). Therefore, the inner diameter on the tip side is preferably 1 to 4 mm. Since the maximum outer diameter of the tube (1) is connected to the intraoral tube and catheter and the nasal guide tube in some way or inserted into the tube (1), necessity of a connecting member, fitting of the member, etc. Considering the properties and the like, it is preferable that the degree is large to some extent. There is no particular limitation on the outer diameter of the tube (1), which does not cause pain in the nasal cavity due to damage to the nasal mucosa of the patient by the nasal cavity induction tube, but the outer diameter is preferably 4 to 8 mm.

[0009] The total length of the stylet (2) inserted and fixed in the tube lumen so that the tube (1) can be formed into a shape along the upper part of the nasal cavity is preferably 20 to 50 mm. The reason for this is that when the tube is pushed in from the nose, gripping and pushing the part containing the stylet (2) into the tube (1) has a higher bending rigidity than grasping and pushing the tube-only part. , Insertion becomes easy. Therefore, it is preferable to exceed the length from the nose to the outside of the oral cavity. Considering the inductivity of the tube (1) from the nose to the mouth, the outer diameter of the stylet (2) is desirably as large as possible and has high bending rigidity. Pushing the tube (1) damages the nasal mucosa of the patient, causing a problem of nasal pain. Therefore, the outer diameter is 0.9-1.3m
m, particularly about 1.1 mm in outer diameter.
Is preferred. The material of the stylet (2) is not particularly limited, but polyurethane resin, polyvinyl chloride resin, silicone resin, polyamide resin, polyethylene resin, thermoplastic elastomer, and the like are preferable.

The distal end (3) has a curved portion of R5 to 20 mm which prevents erroneous insertion in the direction of the esophagus and can easily guide the distal end (3) into the oral cavity by pushing the tube (1). preferable. Also, flatten the tip,
The pigtail (8) may be formed in a one- to four-fold wound shape. It is preferable that the middle part (4) and the rear end part (5) have a shape that can be easily inserted from the nasal cavity into the upper part of the pharynx, the middle part (4) has a curved part of R40 to 60 mm, and the rear end part (5) has R
It is preferably a curved shape along the upper nasal cavity having a curved portion of 20 to 40 mm. The seal (6) at the distal end of the tube (1) is preferably rounded so as not to damage the nasal cavity of the patient. Preferably, the tip is sealed with a silicone adhesive, a urethane adhesive, or the like. The cutting marking (7) is printed on the maximum outer diameter portion of the tube (1), and if the cutting position is clear, the ink is not particularly limited, but the ink is irradiated with UV and the printing does not disappear. It is preferable to do so.

[0011]

As described above, by using the nasal cavity guiding tube according to the present invention, it is easy to push the nose from the nose, to guide from the nose to the mouth, to prevent erroneous insertion of the tube tip into the esophagus, and to prevent This is a very useful nasal cavity guiding tube that can easily guide the distal end portion into the oral cavity by pushing in the tube coming out of the nasal cavity.

[Brief description of the drawings]

FIG. 1 is a side view showing a structure of a nasal cavity guiding tube according to one embodiment of the present invention.

FIG. 2 is an enlarged view of a tip portion according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tube 2 Stylet 3 Front end 4 Middle part 5 Rear end 6 Sealing part 7 Marking for cutting 8 Pigtail

Claims (3)

[Claims] 1. A nasal guide tube used for guiding a catheter from the oral cavity to the nasal cavity, which is a tube or a rod-shaped catheter having a nasal guide portion at one end, wherein the nasal guide portion has a tip portion, an intermediate portion, A nasal cavity guiding tube having three continuous curved portions at a rear end. 2. The tip of the nasal cavity guiding portion has a radius of 5 to 20 mm.
2. The nasal cavity guiding tube according to claim 1, wherein the tube has a curved portion having a radius of 40 to 60 mm at a middle portion and a radius of 20 to 40 mm at a rear end portion. 3. The nasal cavity guiding tube according to claim 1, wherein the tip of the nasal cavity guiding portion has a pigtail shape.