JP2022015089A - catheter - Google Patents

Abstract

To provide a catheter usable more easily in comparison with a conventional catheter or a catheter used for a conventional procedure.SOLUTION: A catheter includes a tubular member 12 insertable nasally or orally into a patient's body. The side face of the tubular member 12 is provided with marks M1-M4 serving as a guide for the insertion depth when being inserted into a prescribed depth in the body. The distance from an insertion end of the tubular element 12 to each mark is set to be a length corresponding to a patient's weight.SELECTED DRAWING: Figure 2

Description

The present invention relates to a catheter.

Conventionally, as a catheter used for tube feeding, a catheter device including a light source having a laser diode that emits visible red light and a fiber that guides the light from the light source to the vicinity of the tip of the catheter is known (for example, Patent Document). 1).

According to the conventional catheter device, when the catheter is inserted into the body, the light emitted near the tip of the catheter can be visually recognized from outside the body, and the position of the tip of the catheter can be confirmed from outside the body. As a result, it is possible to prevent the tip (distal end) of the catheter from being inserted in the wrong position.

Japanese Unexamined Patent Publication No. 2016-87091

However, the conventional catheter device has to be used in a state where the catheter and the laser diode are connected by a fiber, so that it is not always easy for the operator to use.

By the way, as one of the procedures for performing tube feeding, there is a technique of measuring the length of a specific part of a patient and marking the catheter with the measured length as a guideline of the insertion depth. Specifically, the length from the patient's nose to the earlobe and the length from the earlobe to the adam's apple to the epigastric region (xiphoid process) are measured in advance, and the total length is inserted. As a guideline for the depth, mark the catheter with an oil-based pen or the like, and then insert the catheter into the patient's body using this mark as a guideline. This procedure eliminates the need for laser diodes and fibers required by conventional catheterization devices, but requires the work of measuring and marking the length of a specific part of the patient in advance. Therefore, it is undeniable that it is bothersome. In addition, there is a concern that human error may occur if a person who is unfamiliar with this procedure performs it.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a catheter that is easier to use than a conventional catheter device or a catheter used in a conventional procedure.

The catheter of the present invention includes a tubular member that can be inserted into the patient's body nasally or orally, and the side surface of the tubular member has an insertion depth when the tubular member is inserted to a predetermined depth in the body. A mark as a guide is provided, and the distance from the insertion end of the tubular member to the mark is set to be a length corresponding to the weight of the patient.

In the present invention, it is only necessary to measure the weight of the patient in advance, and the present invention uses a mark in which the distance from the insertion end (distal end) of the tubular member is set so as to have a length corresponding to the weight as a guide. Since the catheter (tubular member) of the present invention may be inserted into the patient's body, the catheter is easier to use than a conventional catheter device or a catheter used in a conventional procedure.
In addition to lines and dots, the marks may include figures, symbols, characters, and the like such as rectangular shapes and elliptical shapes, regardless of whether the marks are two-dimensional or three-dimensional.

As a preferred embodiment of the catheter of the present invention, it is preferable that the marker is accompanied by a number indicating the weight of the patient.
In the above aspect, the operator can easily recognize whether or not the catheter is suitable for use by comparing the actual weight of the patient with the number written on the marker of the catheter.
In addition, as the above-mentioned number, for example, when targeting a newborn baby, it may be "1500" in gram notation or "1.5" in kilogram notation.

As a preferred embodiment of the catheter of the present invention, as the mark, a plurality of marks having different distances from the insertion end according to the weight of the patient to be used are provided, and each of the plurality of marks has the above-mentioned mark. It is advisable to include a number indicating the weight.
For example, it is possible to prepare a plurality of catheters of the present invention having different marker positions according to the weight of the patient, and the operator can select and use the catheter according to the actual weight of the patient from among them. In the above aspect, since the catheter of the present invention can be used for patients of various weights with only one catheter, the catheter is more convenient to use.

As a preferred embodiment of the catheter of the present invention, it is preferable that the mark is composed of a figure having a shape extending in the axial direction of the tubular member.
In the above aspect, since the visibility is relatively good, there is an effect that the operator can easily adjust the insertion depth.
As the above-mentioned figure, an elliptical shape, a rectangular shape, or the like can be exemplified.

As a preferred embodiment of the catheter of the present invention, a side hole that opens toward the side surface of the tubular member is provided in the vicinity of the insertion end portion, and when the tubular member is viewed from the side surface, the marker is used. The side holes may be on the same surface.
In the above aspect, since the orientation of the mark and the orientation of the side hole are related, the operator can recognize which direction the side hole is facing from the orientation of the marker.

According to the present invention, the catheter is very easy to use as compared with a conventional catheter device and a catheter used in a conventional procedure.

It is a perspective view which shows the catheter which concerns on one Embodiment of this invention. It is a partially enlarged view of the tubular member of the catheter shown in FIG. It is a figure which shows typically the state which the catheter shown in FIG. 1 is inserted into a nostril.

Hereinafter, the catheter of the present invention will be described with reference to the drawings.

[Catheter configuration]
As shown in FIG. 1, the catheter 10 includes, for example, a connector portion 11 to which an extension tube 20 or the like can be attached and detached, and a tubular member 12 connected to the connector portion 11. The catheter 10 is, for example, a catheter for performing nasal tube feeding to a baby such as a newborn baby.

The connector portion 11 has a main body portion 111 connected to the tube 12 and a cap 112 that covers the opening of the main body portion 111. The main body 111 is tubular and communicates with the tube 12. Although not shown, the opening of the main body 111 is configured to be engageable with the cap 112, and for example, an extension tube 20 or a syringe can be connected to the opening. When connecting the extension tube 20 to the connector portion 11, after removing the cap 112 from the main body portion 111, the connector portion 21 of the extension tube 20 is connected to the exposed opening of the main body portion 111. When disconnecting the connector portion 11 and the extension tube 20, the connector portion 21 of the extension tube 20 is removed from the main body portion 111, and then the opening of the main body portion 111 is covered with the cap 112.

[Structure of tubular member]
As shown in FIGS. 1 and 2, the tubular member 12 is a transparent or translucent hollow circular tube made of, for example, a polyvinyl chloride resin. The outer surface shape of the insertion end of the tubular member 12 (the end of the both ends of the tubular member 12 on the side to be inserted into the child and located opposite to the end connected to the connector portion 11). Is substantially hemispherical, as shown in FIG. The tubular member 12 has, for example, an outer diameter of 1.0 mm to 2.7 mm and a length of 40 cm to 80 cm.

At the insertion end of the tubular member 12 and its vicinity, a hole 14 that opens in the direction along the tube axis of the tubular member 12 (hereinafter referred to as the axial direction) and a side that opens toward the side surface of the tubular member 12 One hole 13 is formed for each. The opening shape of the side hole 13 is, for example, an elliptical shape in a plan view. The hollow portion 121 of the tubular member 12, the hole 14 and the side hole 13 communicate with each other, and the nutrients and the like sent to the tubular member 12 via the syringe and the extension tube 20 receive these holes 14 and the side hole. It will be supplied to the digestive organs such as the stomach via 13.

Further, on the side surface of the tubular member 12, four marks M1 to M4 arranged at predetermined intervals along the axial direction, numbers G1 to G4 written on the right side of each mark M1 to M4, and each mark M1 to For example, the numbers G1 to G4 written together on the right side of M4 are provided. The marks M1 to M4 and the numbers G1 to G4 are made of, for example, black, and are printed on the side surface of the tubular member 12 using a laser irradiation device or the like. The marks M1 to M4 and the numbers G1 to G4 are present on the same surface as the side hole 13 when viewed from the side surface of the tubular member 12 (when viewed from the direction shown in FIG. 2). The "identical surface" here does not mean the entire tube wall located on the side surface of the tubular member, but when the tube wall of the tubular member is viewed along the axial direction, the upper surface, the bottom surface, or the left and right side surfaces. Refers to the pipe wall of the part located in any of.

Each of the marks M1 to M4 serves as a guide for the insertion depth when, for example, the tubular member 12 is inserted into the stomach of the baby. Each mark M1 to M4 is composed of, for example, an elliptical figure extending along the axial direction of the tubular member 12. The long side of the ellipse is along the axial direction of the tubular member 12.

The distance from the insertion end of the tubular member 12 to each mark M1 to M4 is set to be a length corresponding to the weight of the child. To explain this concretely, for example, the following equation (1) proposed by Danielle Freeman et al. (Danielle Freeman and two others, Advances in Neonatal Care, June 2012, 12 (3), pp.179-82) is used. Based on this, when the baby weighs 1,000 g, 1,500 g, 2,000 g, and 2,500 g, the length from the nostril to the stomach is calculated, and the length is calculated from the insertion end of the tubular member 12 to each mark. The distance is. That is, if the weight of the child is 1,000 g, the distance from the insertion end of the tubular member 12 to the mark M1 is 16 cm, and if the weight of the child is 1,500 g, the distance from the insertion end of the tubular member 12 to the mark M2 is reached. If the child weighs 2,000 g, the distance from the insertion end of the tubular member 12 to the mark M3 is 19 cm, and if the infant weighs 2,500 g, the tubular member 12 is inserted. The distance from the end to the mark M4 is 20.5 cm.
Nasogastric (nasal stomach, unit cm) = [3 x weight (weight, unit kg) +13] ・ ・ ・ (1)

The numbers G1 to G4 written together with the marks M1 to M4 mean the weight of the child. Specifically, the number G1 means that the child weighs 1,000 g, the number G2 means that the child weighs 1,500 g, and the number G3 means that the child weighs 2,000 g. Meaning, the number G4 means that the baby weighs 2,500 g.

[How to use the catheter]
First, the catheter 10 shown in FIG. 1 is prepared. If the extension tube 20 is used, it may be connected to the catheter 10 at this preparatory stage, or may be connected to the catheter 10 after the catheter 10 is inserted into the baby's body.

Next, the tubular member 12 is inserted through the nostril of the infant, using the mark corresponding to the weight of the infant measured in advance as a guideline for the insertion depth. Specifically, for example, when the catheter 10 is inserted through the nostril of a child weighing 2,500 g, as shown in FIG. 3, the marker M4 and the nostril 41 substantially coincide with each other using the marker M4 as a guideline for the insertion depth. Insert the tubular member 12 up to. In this case, since the number G4 written together with the mark M4 is located on the hand side of the worker, the worker can clearly and easily recognize that the mark M4 is a mark corresponding to a body weight of 2,500 g. ..

If the weight of the child is within the range of the numbers G1 to G4 written together with the marks M1 to M4 but does not match those numbers, for example, the amount of the scale is based on the two marks having the weight in the range. You may estimate the position that serves as a guide for the insertion depth with. For example, if the weight of the baby is 1,800 g, the distance (eye width) between the mark M2 corresponding to 1,500 g and the mark M3 corresponding to 2,000 g is divided into five equal parts by the amount of the mark, of which the mark M2 is 3/5. The tubular member 12 may be inserted until the position becomes approximately the same as the position of the nostril, assuming that the position becomes a guideline for the insertion depth.

In the present embodiment, marks M1 to M4 that serve as a guide for the insertion depth are provided on the side surface of the tubular member 12, and the distance from the insertion end of the tubular member 12 to each mark M1 to M4 is the weight of the child. It is set to the corresponding length. That is, it is only necessary to measure the weight of the child in advance, and the catheter 10 (tubular member 12) of the present embodiment may be inserted into the body of the child using the mark corresponding to the weight as a guide. It is a catheter that is easier to use than the catheter used for conventional procedures. Further, when the catheter of the present embodiment is used, the skill level of the operator is not required as much as required by the conventional procedure, so that the risk of human error can be reduced.

In the present embodiment, since the numbers G1 to G4 representing the weight of the child are also written on the marks M1 to M4, the worker compares the actual weight of the child with the numbers G1 to G4 and then tubular. It is possible to easily recognize how far the member 12 should be inserted.

In the present embodiment, the above-mentioned four marks M1 to M4 are provided as marks, and the numbers G1 to G4 representing the body weight are also written in each of the four marks M1 to M4. As a result, since it is possible to handle infants of various weights with only one catheter 10 of the present embodiment, the catheter becomes more convenient to use.

In the present embodiment, since the marks M1 to M4 are formed of an elliptical shape extending in the axial direction of the tubular member 12, the visibility is relatively good and the operator can easily adjust the insertion depth.

In the present embodiment, the marks M1 to M4 and the side holes 13 are present on the same surface, and the directions of the marks M1 to M4 and the directions of the side holes 13 are related to each other. The operator can recognize which direction the hole 13 is facing.

The present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention. For example, the following changes can be made.

In the above embodiment, the case where one catheter provided with a plurality of marks is used as an example has been described, but the present invention is not limited to this, and for example, a plurality of catheters having different positions of the marks according to the weight of the child are prepared. , The operator may select and use a catheter according to the actual weight of the child. In this case, a number representing the corresponding weight may be written together on the mark of each catheter, but for example, a number representing the weight may be engraved on the connector portion of the catheter, or a number may be written on the packaging material of the catheter. As long as the operator can recognize how many grams of the catheter to be used, the number does not necessarily have to be written on the mark of each catheter.

In the above embodiment, the numbers G1 to G4 are written together for each of the marks M1 to M4, but the present invention is not limited to this, and the numbers may be omitted for any of the marks M1 to M4.

In the above embodiment, each mark M1 to M4 has an elliptical shape, but the present invention is not limited to this, and may be a rectangular shape extending along the axial direction. Further, as long as the size that can be recognized by the operator can be secured, it may be another shape such as a triangle shape, or it may be a mark composed of lines, dots, symbols, characters, or the like. .. Further, the mark is not limited to the mark configured in a plane, but may be a mark configured in three dimensions such as providing a protrusion. Further, the tubular member may be colored and the boundary between the colors (for example, the boundary between colorless and colored, the boundary between the first color and the second color) may be used as a mark.

In the above embodiment, a case where a mark and a number are printed on the side surface of the tubular member by using a laser irradiation device or the like has been described as an example, but the present invention is not limited to this, and the mark and the number are formed by, for example, embossing. Alternatively, a sticker on which a mark or the like is printed may be attached to the tubular member.

In the above embodiment, the case where the mark and the number are both black has been illustrated as an example, but the present invention is not limited to this, and the color may be separated between the mark and the number, or only a specific mark or a specific number. You may use a different color from the others. Further, the size of the mark or the number may be changed so that the mark and the number are not aligned to the same size and the specific mark or the specific number stands out.

In the above embodiment, the case where the numbers G1 to G4 are expressed in grams has been described as an example, but the present invention is not limited to this, and the numbers may be expressed in other weight units such as kilograms and pounds. Further, a unit such as a gram may be displayed together with a number. Further, in the above embodiment, the body weight is set in increments of 500 g and the number of marks is set to 4, but the increments of body weight and the number of marks can be changed as appropriate. Further, in the case of the above embodiment, an auxiliary mark having a body weight of 100 g may be further provided.

In the above embodiment, the case where the tubular member is a circular tube has been described as an example, but the present invention is not limited to this, and the inside of the cross section may be an elliptical or polygonal tubular member, and the outside of the cross section may be, for example, a quadrangle. It may be a so-called tubular member of a square tube made of a polygon of. Needless to say, the present invention can also be applied to a catheter having a plurality of lumens.

In the above embodiment, the case where nasal tube feeding is performed for a newborn baby or the like has been described as an example, but the present invention is not limited to this, and the present invention is also applied to patients other than newborn babies and oral cases. It is possible. In the case of oral administration, the length from the mouth to the stomach according to the weight of the baby is calculated based on the following formula (2), and the length is calculated from the insertion end of the tubular member to each mark. It is preferable to set the distance to.
Orogastric (oral stomach, unit cm) = [3 x weight (weight, unit kg) +12] ・ ・ ・ (2)

The material, shape, size, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary as long as the present invention can be achieved, and are not limited.

10 ... Catheter 11 ... Connector part 12 ... Tubular member 121 ... Hollow part 13 ... Side hole 14 ... Hole 20 ... Extension tube 21 ... Connector part 22 ... Tube 41 ... Nostril M1, M2, M3, M4 ... Mark G1, G2 ... G3, G4 ... Numbers

Claims (5)

Equipped with a tubular member that can be inserted into the patient's body by nasal or oral
On the side surface of the tubular member, a mark is provided as a guideline for the insertion depth when the tubular member is inserted to a predetermined depth in the body.
A catheter characterized in that the distance from the insertion end of the tubular member to the mark is set to a length corresponding to the weight of the patient. The catheter according to claim 1, wherein a number representing the weight of the patient is also written on the mark. As the mark, a plurality of marks are provided in which the distance from the insertion end differs depending on the weight of the patient to be used.
The catheter according to claim 1 or 2, wherein a number representing the body weight is also written in each of the plurality of marks. The catheter according to any one of claims 1 to 3, wherein the marker is composed of a figure having a shape extending along the axial direction of the tubular member. A side hole that opens toward the side surface of the tubular member is provided in the vicinity of the insertion end portion.
The catheter according to any one of claims 1 to 4, wherein the marker and the side hole are present on the same surface when the tubular member is viewed from the side surface.

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