JP4088692B2 - Stylet - Google Patents

Description

  The present invention provides a stylet for safe and easy insertion of an endotracheal tube or catheter that is intubated to secure an airway before artificial respiration at the time of general anesthesia or emergency resuscitation in medical or veterinary medicine, and after surgery. The present invention relates to a stylet used when inserting a feeding tube or a urine tube.

Conventionally, when a therapeutic catheter is intubated in the trachea or esophagus at a medical or veterinary site, a flexible catheter shape is maintained to facilitate intubation into the trachea or esophagus. A stylet was inserted into the interior, and the mouth was opened with a laryngoscope, and the tube was intubated while looking at the back of the throat.
Also, recently, a small camera built into the stylet can be used to monitor the oral cavity without using a laryngoscope, and at the same time, it can be used to examine the interior of the trachea and esophagus. ing.

For example, Patent Document 1 has the name “endotracheal intubation tube”, a tube body that is curved in the axial direction, a light-emitting body that is bent and protrudes in an S-shape inside the radius of curvature at the tip, and a tube body An endotracheal intubation tube is disclosed that includes a connection cable that is provided along the axial direction and supplies power to the light emitter. Further, this endotracheal intubation tube is also disclosed having a plug that can be used as a cuff.
According to this endotracheal intubation tube, when inserting the endotracheal intubation tube without the need of a flashlight or a laryngoscope, light that leaks to the surface of the neck through the thyroid hyoid periosteum or the cricoid thyroid membrane is surely confirmed. The tube body can be inserted into the tube. In addition, the plug body can function as a plug that fits the cross-sectional shape of the trachea after insertion without being caught inside the trachea.

Further, Patent Document 2 discloses a solid and flexible stylet including an illumination fiber and an image guiding device under the name “flexible endotracheal tube including an optical fiber scope”. Furthermore, the thing provided with the hollow channel | path for injection ventilation, suction | inhalation, or washing | cleaning is also disclosed.
This flexible stylet can image the inside of the trachea with an image guiding device while irradiating the inside of the trachea with an illumination fiber, so that the inside of the airway can be observed safely and easily. . In addition, if a hollow passage is provided, it is easy to secure an airway, and suction or a chemical solution can be injected.

  Furthermore, Patent Document 3 has the name “stylet with observation optics for endotracheal tube intubation”, and includes an image transmission fiber, an illumination light transmission fiber, a light source that generates illumination light, and a power source. A stylet that can be inserted into a body cavity while optically observing the inside of a tube is disclosed.

JP 2003-339871 A Japanese translation of PCT publication No. 2002-508982 JP 11-113843 A

However, in the conventional “intratracheal intubation tube” as disclosed in the above-mentioned Patent Document 1, as shown in FIG. 1 of Patent Document 1, the tube itself is provided with a light emitter, and externally through a cable (not shown). It is considered that the light emitting unit emits light by supplying power to the light emitting unit. For this reason, there is a possibility that the tube itself may be reused, and there is a problem that it is not preferable in terms of hygiene.
In addition, the cable for supplying power may be in the way during intubation.
Furthermore, the tube once inserted into the living body may be used for a long period of time while being inserted into the living body. In such a case, the light source portion is exposed to components such as saliva and gastric juice and deteriorates. In the case of, there was a risk of damaging the living body.

In addition, in the “flexible endotracheal tube including an optical fiber scope” disclosed in Patent Document 2, an image guiding device is provided in a stylet in addition to an illumination fiber. Although the image guiding device itself can be reduced in size, if the size is reduced, the field of view is narrowed and the meaning of image guiding is diminished. In addition, since the inner diameter of the tracheal tube is about 1 mm minimum, it is about 3 mm even for small ones, and about 20 mm for thick ones. Considering this inner diameter, the stylet equipped with an image guidance device is too thick and practical. There was a problem that it was not suitable for.
Even if only the image guiding device is provided, if there is no illumination, the back of the throat is dark and cannot be seen, so the image guiding device always requires an illumination fiber.
Furthermore, if the image guidance device transmits a signal related to an image through a fiber or a radio wave using a transmitter, the fiber or transmitter is provided on the side of the doctor or veterinarian, and the trachea is inserted. There was a problem that sometimes got in the way of work. Such stress during work threatens the safety and reliability of the insertion work, and there is a problem that it places a physical and mental burden on doctors and veterinarians.
In addition, with such an image guiding device, the stylet is expensive and disposable because it is uneconomical, so it can be reused. The sterilization process which does not give is not easy. Therefore, there is a possibility of reuse by simple cleaning, and the risk of infectious diseases has not been eliminated at present.

  In the “stylet with observation light for endotracheal tube intubation” disclosed in Patent Document 3, as in Patent Document 2, since the image transmission fiber and the illumination light transmission fiber are provided in the stylet, There was a problem that it was too thick to be practical. In addition, since the illumination power supply and the image observation unit are at the hand of the stylet, the doctor and veterinarian are burdened with the hand, and the posture for making eye contact with the image observation unit at hand is impossible. There was a problem that it was difficult to use. Furthermore, as mentioned above, because it is not suitable for sterilization due to its structure and it can be easily imagined that it is expensive, it is not necessary to reuse it to prevent contamination, but it must be disposable. In the end, there was a problem of allowing repeated use.

The present invention has been made in response to such a conventional situation, and an object thereof is to provide a stylet with a simple structure including a light emitting means for illuminating the inside of the trachea or esophagus when the catheter is inserted into the trachea or esophagus. In addition, in order to prevent the stylet and intubation tube from being used again, we provide a stylet with a structure that prevents the reuse of the light-emitting means that illuminates the interior when it is inserted so that it must be disposable. There is to do.
It should be noted that the name of the tube in Patent Documents 1 to 3 is particularly distinguished as a catheter because the tube is present in other constituent members when the invention of the present application and the embodiment thereof are described. The tube in 3 thru | or 3 and the catheter of this application are equivalent.

The stylet according to claim 1 of the present invention is a disposable stylet for inserting a catheter to be intubated from the oral cavity into the trachea or esophagus, and includes a main body made of a linear body and one end of the main body. possess a light emitting unit provided in section, and a light emitting means for emitting the light emitting portion, the body portion is a linear body having flexibility and shape retention, the light emitting unit, the color rendering properties Ra Is equipped with a white LED with Ra ≧ 90, and the light emitting means has a power supply for supplying power to the white LED and a power supply circuit. The power supply circuit once disconnects this connection once connected to the power supply. An irreversible switch that cannot be used is provided .
In the stylet having the above configuration, the light emitting portion provided at one end of the main body emits light in combination with the light emitting means, and has an action of illuminating the inside of the trachea or the esophagus.
Moreover, the linear body which comprises a stylet has the effect | action which curves along the shape of the site | part intubated, and hold | maintains the shape.
Further, the irreversible switch has an action of preventing interruption of power supplied from the power source to the power supply circuit.
In addition, flexibility means having a property to bend, and shape retaining property means to have rigidity enough to maintain the state once bent. is there.

The stylet of claim 2 of the present invention is a use had abandoned stylet for inserting the catheter that is intubated like the trachea or esophagus from the oral cavity, the stylet main body made of a linear body When a light emitting portion that is eclipsed set at one end of the body, have a light emitting means for emitting the light emitting portion, the body portion includes an internal structure made of resin having flexibility, the inner A light-emitting unit including a white LED having a color rendering property Ra of Ra ≧ 90, and the light-emitting means includes a power source for supplying power to the white LED. A power supply circuit, and the power supply circuit includes an irreversible switch that cannot be disconnected once connected to a power source .
The stylet with the above configuration has the same action as the stylet described in claim 1 .

The stylet of claim 3 is the invention according to claim 1 or claim 2, it is characterized in that it has a cuff provided around the body portion.
In the stylet of the above configuration, since Ru Tei is cuff circumferentially to the main body portion, the friction between the body portion and the inner wall of the catheter stylet while in contact with the inner wall of the catheter that will be intubated like the trachea and esophagus Has the effect of generating force.

Further, the stylet is an invention of claim 4 is a stylet of claim 3, it is characterized in Rukoto to have a means to expand and contract the cuff.
The above configuration of the stylet In addition to the action of the stylet according to claim 3, cuff circumferentially provided on the main body portion expands by means of expansion and contraction, contraction by means of Ru is expanded and contracted as required Has the effect of The cuff spaced or generates a frictional force between the body portion and the inner wall of the catheter stylet while in contact with the inner wall of the catheter that is intubated like the trachea and the esophagus, stomach Ru Ah is contracted from the inner wall of the catheter Thus, this frictional force is released .

A stylet according to a fifth aspect of the present invention is the stylet according to any one of the first to fourth aspects, wherein the main body portion preliminarily forms a curve corresponding to an insertion target location. It is characterized by this.
In addition to the action of the stylet according to any one of claims 1 to 4 , the stylet having the above-described configuration is formed along a target portion by forming a curve in advance according to a target portion into which the stylet is inserted, such as a trachea or an esophagus. This has the effect of facilitating intubation.

The stylet according to claim 1 of the present invention is a combination of the light emitting part and the light emitting means, and makes it easy to confirm with a laryngoscope by illuminating the vicinity of the end of the stylet in the trachea or esophagus where light is difficult to reach. Thus, the intubation of the catheter can be performed easily and safely, and the stylet can be quickly pulled out from the catheter after the catheter is intubated.
In the stylet according to the first aspect of the present invention, the irreversible switch prevents the power supplied from the power source to the power supply circuit from being interrupted. During treatment, light emission by the light emitting means is not interrupted. Also, since the irreversible switch cannot be reused once it is used, it is necessary to replace the switch at least in order to reuse the stylet, and to prevent contamination infection by promoting the disposable use of the stylet. Is possible.

The stylet set forth in claim 2, that have a similar effect as the stylet as described in claim 1.

The stylet set forth in claim 3, in causing frictional force between the stylet and the inner wall of the catheter by cuff circumferentially provided on the main body portion comes into contact with the inner wall of the catheter that will be intubated Ensuring that the catheter can be easily intubated against the frictional force between the catheter and the trachea or esophagus, or that the stylet moves too far inside the slack catheter to protrude from the end of the catheter and damage the trachea or esophagus be able to.
Since it does not contain an imaging device, but can not be or examination or perform insertion-treatment while observing the internal deepest of the trachea and esophagus intubation catheter, the outer diameter of the stylet for not including the imaging device can be thin, the price is also Ru can der that you suppressed low.
Incidentally, the stylet as described in the claim 3 is not provided with means for Ru is expanded and contracted the cuff includes only the cuff and connecting means for independently of the expansion and contraction in this cuff Corresponding . The stylet described in claim 3 can use a cuff by using separate and independent expansion / contraction means, and as a result, exhibits the same effect as that of claim 4. The cuff generally refers to a structure having a function of expanding and contracting.

Further, the stylet is an invention of claim 4 of the present invention, by cuff circumferentially provided on the main body portion comes into contact with the inner wall of the catheter that is intubated expanded by means of Ru is expanded and contracted, Ri facilitated the intubation catheter causing frictional force between the invention as well as the stylet and the inner wall of the catheter of claim 2 against the frictional force between the catheter and the trachea and esophagus, event the flabby within the catheter too much progress in the stylet, from the catheter end can be Rukoto so as not to damage such as the trachea and esophagus out look. Also, if Ru cuff is deflated by means of expansion and contraction at a distance from the inner wall of the catheter, it is possible with this to Ru is extinguished once generated frictional force, adjust the frictional force by the means of expansion and contraction Ru can be.
Specific examples of the means for inflating and deflating in claim 4 include a mechanical device such as a balloon that can fit in the palm of the hand or a compressor that can supply compressed gas. The means for expanding and contracting is a concept including a tubular body such as a tube connected to the cuff.

Furthermore, the stylet according to the fifth aspect of the present invention facilitates the intubation of the catheter by forming in advance a curve corresponding to the target location where the stylet is inserted, such as the trachea and the esophagus. The time required for intubation can be shortened. In addition, the stylet pre-formed in a desired shape can be fine-tuned so as to be closer to the shape of the target location to be inserted by providing flexibility and shape retention. The catheter is safer without fear of damaging the trachea or esophagus.

The stylet according to the first to third embodiments of the present invention will be described below with reference to FIGS.
FIG. 1 is a conceptual diagram of a stylet according to the first embodiment of the present invention. As shown in FIG. 1, a stylet 1a according to the first embodiment of the present invention includes a stylet body 2 composed of a linear body formed so as to have flexibility and shape retention, and an end portion thereof. And a light emitting unit 3 provided in the device. Further, at the other end, the catheter 10 is caught in the trachea or esophagus, and the stylet 1a relatively protrudes from the distal end of the catheter, so that the distal end of the stylet 1a damages the living body of the trachea or esophagus. The stopper 9 is provided so that there is no.
A power supply unit 5 and a switch 6 for supplying power to the light emitting unit 3 are provided at the end opposite to the end where the light emitting unit 3 of the stylet body 2 is provided. The outer diameter of the light emitting portion 3 is not particularly limited as long as it can be easily inserted into the catheter 10, but generally a diameter of 1 mm to 6 mm is suitable. When the catheter 10 passes through the glottis, the length of the light emitting unit 3 does not have to be observable with a laryngoscope or the like. Therefore, in the case of an LED described later, it is sufficient that only the tip is shining, and even when a chemiluminescent material is used, it is sufficient that the light emitting portion is 3 cm.
FIG. 2 is a conceptual diagram of a stylet according to the second embodiment of the present invention. Based on the first embodiment shown in FIG. 1, a cuff 4 is provided around the light emitting portion 3, and the cuff 4 is a balloon 7 and a tube 8 as means for inflating and deflating the cuff 4. From this, air is sealed and expanded, abuts against the inner wall of the catheter 10, and further adheres to generate a frictional force.
By doing so, the stylet body 2 can be integrated with the catheter 10, and the flexible catheter 10 can be reinforced to make intubation easier. Further, the cuff 4 is brought into close contact with the inner wall of the catheter 10 to generate a frictional force. Even when a frictional force is generated between the outer wall of the catheter 10 and the trachea or esophageal inner wall at the time of intubation, the cuff 4 acts against it. Intubation can be performed more easily. Furthermore, since the cuff 4 suppresses the advancement of the stylet body 2 in the catheter 10, the stylet body 2 protrudes from the end of the catheter 10 in parallel with the stopper 9 described above, so that the inner wall of the trachea and esophagus Can also be prevented.

The air sent to the cuff 4 can be discharged again to the balloon 7 through the tube 8. Therefore, the degree of contact between the inner wall of the catheter 10 and the cuff 4 can be adjusted, and after the intubation of the catheter 10 is completed, the pressing force of the balloon 7 is weakened and the air in the cuff 4 is discharged to the balloon 7, The stylet 1b can be quickly removed from the catheter 10 by contracting the cuff 4 to release the contact between the inner wall of the catheter 10 and the cuff 4.
In the present embodiment, the balloon 7 and the tube 8 are used as means for inflating and deflating the cuff 4, and the cuff 4 is inflated and deflated by sending and discharging gas. However, the present invention is not limited to gas. The liquid may be enclosed and sent and discharged. Further, as long as it is a means capable of sending and discharging gas and liquid into the cuff 4 without using the balloon 7 and the tube 8, any structure including a compressor device capable of supplying compressed gas is provided. It may be a thing. However, it goes without saying that it is desirable to reduce the size of the stylet so as not to hinder the size reduction.

Also in the present embodiment, a power supply unit 5 and a switch 6 for supplying power to the light emitting unit 3 are provided at the end opposite to the end where the light emitting unit 3 of the stylet body 2 is provided. And works in the same way.
In addition to the cuff 4 described above, a stopper 9 is provided in accordance with the length of the catheter 10 and the stylet body 2 so that the stylet body 2 does not protrude from the end of the catheter 10. In this case, the stopper 9 and the above-described cuff 4 can be combined to more reliably prevent the stylet body 2 from protruding from the end of the catheter 10. The stopper 9 is not necessarily provided, and the stopper 9 may not be provided when a sufficient frictional force is generated between the cuff 4 and the inner wall of the catheter 10 when the cuff 4 is expanded. Further, the stopper 9 may have a disk shape as shown in FIG. 2, or the edge of the stopper 9 may be bent toward the catheter 10 to cover the end of the catheter 10.
Furthermore, the stylet body 2 is formed so as to warp in advance in a longitudinal direction in accordance with the purpose and use of the catheter to be intubated in advance.
However, it is desirable that this curve has flexibility and shape retention that allow the curve to be adjusted to some extent.
In this manner, the stylet 1b is pre-shaped according to the shape of the human oral cavity or the shape of the oral cavity of non-human livestock or pets, so that the doctor or veterinarian performing the treatment can change the stylet 1b to the desired shape each time. Therefore, intubation can be performed quickly and easily.
In addition, since the stylet body 2 has flexibility and shape retention, for example, the stylet 1b for a human adult can be adjusted and used for a child, so the versatility of the stylet 1b is increased. .

Next, the internal structure of the stylet 1b according to the present embodiment will be described with reference to FIG.
FIG. 3 is a cross-sectional view of the stylet according to the present embodiment. In FIG. 3, the same reference numerals are assigned to the same elements, and the description of the configuration is omitted. The tube 8, not shown in its entirety in FIG. 2, is provided inside the stylet body 2 so as to connect the balloon 7 to the cuff 4, and supplies air stored in the balloon 7 to the cuff 4. Or conversely, the air in the cuff 4 can be fed to the balloon 7. Although not shown in FIG. 3, the tube 8 is provided with a feed / discharge control mechanism for controlling the feed / discharge of air to the cuff 4, for example, a clamping tool such as a check valve, a pin cock, a clip, etc. The air sent to the cuff 4 after being compressed 7 may be prevented from flowing back into the balloon 7 until the intubation of the catheter 10 is completed. Further, for example, when a check valve is provided as a feed / discharge control mechanism, if the tube 8 is crushed with a finger, the check valve creates a gap with respect to the flow path of the tube 8 so that air flows back into the balloon 7. It is good to make it the structure which can be made, or to enable selection of sending and discharging by switching a check valve. Of course, the stylet 1b may be handled by compressing the balloon 7 with strength and adjusting the degree of expansion of the cuff 4 by hand.

A mechanism for supplying power to the light emitting unit 3 of the stylet 1b will be described in detail with reference to FIGS.
As shown in the dotted circle in FIG. 3, the stylet 1b according to the present embodiment is configured such that the power supply circuit 13 of the power supply circuit connected to the power supply 11 inside the switch 6 is connected to the light emitting portion by contact. The power is supplied to 3. In the present embodiment, the power cable 13, the switch 6 provided therein, and the white LED 12 connected to the power cable 13 and housed in the light emitting unit 3 and functioning as a light source and the power source 11 are combined to emit light. It is said.

Further, although the white LED 12 is used in the present embodiment, it suffices that the doctor can recognize the position of the tube tip, and particularly the tube tip position at the position of the throat that cannot be seen from the patient's mouth. Any color LED may be used if possible. However, a white LED is desirable considering that accompanying information can be obtained when a tissue in a living body such as a patient's mouth can be seen when the tube is inserted into the back. If the same white LED is used, a white LED is more preferable than an ultraviolet-excited white LED. From the viewpoint of adverse effects of ultraviolet rays on the human body, it can be said that a white LED in excitation light that does not contain ultraviolet wavelengths is more desirable.
In addition, although there is a difference in the wavelength band of the excitation light as described above, the white LED also has a color rendering property that the white color is close to sunlight, so that the doctor can see the tissue in the living body with the naked eye. From the viewpoint of easy identification of blood vessels (arteries and veins), white LEDs having high color rendering properties (Ra = 90 or more) are desirable. Furthermore, the high color rendering white LED has a simpler power supply and wiring because the white color with one semiconductor element is simpler than the white color with the combined light of three semiconductor elements (red, green, and blue). The latter type of high color rendering white LED is desirable.
As described above, when the white LED 12 having a high color rendering property by the one-chip type near-ultraviolet excitation light is used as the light source of the light emitting unit 3, it is possible to provide a stylet with a smaller diameter. When inserting, it is possible to see where the tip of the catheter is, so that catheter and veterinarian intubation can be performed safely and reliably, and the work load is reduced. It is done. In addition, it can be said that if the color rendering is good, the biometric information in the mouth can be obtained along with the visual recognition process at the time of intubation, and it is useful for supporting the decision-making of doctors and veterinarians. .
In addition, the semiconductor light emitting element described in this specification means an element that is made of a semiconductor material and emits light when energized, and is, for example, an LED or a laser diode. The light emitting element wavelength here includes not only visible light but also an infrared wavelength and an ultraviolet wavelength. By the way, in the case of the purpose of emitting visible light by reacting with a fluorescent agent administered and accumulated in an affected area or the like, if the wavelength that better emits the fluorescent agent is an infrared wavelength or an ultraviolet wavelength, the wavelength concerned A light emitting element including the above may be selected.

In addition, in FIG. 3, the switch 6 is schematically represented as a push button type switch so that the power supply mechanism of the stylet 1b according to the present embodiment can be easily understood. An irreversible switch as shown in FIG. 4 is desirable.
The stylet according to the present invention includes a power emission type in which a light source provided in the light emitting unit 3 emits light with electric power as in the stylet 1b according to the first or second embodiment, and at least two provided in the light emitting unit 3. It can be roughly divided into chemiluminescent types that emit chemiluminescence by mixing different types of drugs. The power light emitting stylet can be made disposable by providing an irreversible switch. In this case, the use of the stylet can be prohibited and infection can be prevented.
On the other hand, the power light emission type stylet according to the present invention is configured such that, for example, the power supply unit 5 is detachable, and the parts other than the power supply unit 5 have heat resistance that allows airtightness and medical sterilization. May be. In this case, it is economical because parts other than the power supply unit 5 can be repeatedly used by appropriately replacing the power supply 11.
The details of the chemiluminescent stylet according to the present invention will be described later.

As shown in FIG. 3, the stylet body 2 is composed of an outer skin 2a and an internal component 2b, and the power cable 13 and the tube 8 of the balloon 7 are configured to be embedded in the internal component 2b. . The flexibility of the stylet is mainly imparted by the material of the internal structure 2b, and the material is safe for the human body. For the resin, polyethylene, polypropylene, nylon, Teflon (registered trademark), silicon, etc. Can be used.
The outer skin 2a is combined with the inner structure 2b to give the role of optimizing flexibility and shape retention as a whole stylet, and the material is not limited as long as it is safe for the human body. Then, stainless steel is mentioned.
The explanation here assumes that the inner structure 2b is covered with the coating of the outer skin 2a. However, in the present invention, even if the inner structure 2b remains and the outer skin 2a is not covered, the purpose can be achieved. There is no problem if it has convenient flexibility and shape retention.

4A to 4C are cross-sectional structural views schematically showing the configuration of the irreversible switch of the stylet according to the present embodiment.
The configuration of the irreversible switch of the stylet 1c in FIG. 4A is formed in the power supply unit 5 provided at the end of the stylet body 2, and each power supply circuit is connected to the battery 14 provided inside. Are configured such that the power cables 13a ₁ and 13a ₂ forming the contact are in contact with each other. Although the power cable 13 a ₁ is in contact with the electrode of the battery 14, the power cable 13 a ₂ is not in contact with the electrode of the battery 14.
The inner wall of the stylet body 2 and the partition wall 15 made of an easily deformable material are in close contact with each other and are in a stationary state, and this state is a structure that enables sterilization. The partition wall 15 that is in close contact and immovable as described above remains stationary even when the pushing portion 16 protruding from the lid portion 17 is pushed in. However, the partition wall 15 is displaced by the amount of displacement due to the pushing of the pushing portion 16. 15 is deformed, is intended to contact the battery 14 as a result to the power supply cable 13a _2.
The pushing portion 16 pushes the partition wall 15 and the pushing portion 16 and the battery come into contact with each other, and the displacement of the pushing portion 16 is transmitted to the battery. As a result, the battery 14 and the cable 13a ₂ come into contact with each other. Good.
As described above, the power cable 13a ₂ comes into contact with the electrode of the battery 14, the power supply circuit is formed as a closed circuit, and the white LED 12 connected to the other ends of the power cables 13a ₁ and 13a ₂ is turned on. To do.
Even if the pushing-out portion 16 once pushed back to the original position, the battery 14 does not move, and the white LED 12 is lit as long as the power remains in the power source.

Next, the configuration of the irreversible switch of the stylet 1d in FIG. 4B is also formed in the power supply unit 5 provided at the end of the stylet body 2, and the battery 14 provided therein is supplied with power. The cables 13b ₁ and 13b ₂ are configured to contact each other to form a power supply circuit. Of these power cables 13b ₁ and 13b ₂ , the power cable 13b ₁ is in contact with the battery 14 in advance, but the power cable 13b ₂ is not initially in contact.
To one electrode conductor 18 is connected to the battery 14, that is the end portion is provided contactor 26b _2, and the contact 26b ₁ is also provided on the end of the power cable 13b _2, the stylet When the main body 2 is strongly crushed or bent, the contacts 26b ₁ and 26b ₂ are deformed and contacted, and the power cable 13b ₂ is connected to the battery 14 via the contacts 26b ₁ and 26b ₂ and the conductor 18, and the power supply circuit is connected. It is established as a closed circuit.
Thereby, the white LED 12 connected to the other end of the power cables 13b ₁ and 13b ₂ is turned on.
The other power cable 13b ₁ is previously brought into contact with the other electrode of the battery 14, but when the power cable 13b ₁ in the present embodiment is not shielded, as shown in FIG. 4B, the power cable 13b _In order to avoid a short circuit with 2, it is desirable to wire inside the stylet body 2.

In the stylet 1e of FIG. 4C, the conductor 18 is provided on one electrode of the battery 14 as in FIG. 4B, and the contact 26c ₂ formed at this end portion and the power cable 13c ₂ The contact 26c ₁ formed at the end is deformed and contacted in the same manner as the stylet 1d to form a closed circuit, and the white LED 12 connected to the other end of the power cables 13c ₁ and 13c ₂ is turned on. . In FIG. 4C, the contact 26c ₁ and the contact 26c ₂ seem to be separated from each other, but the dotted line in the figure means that the contacts 26c ₁ and 26c ₂ are further extended. The spiral contact 26c ₁ is inserted in a non-contact manner inside the contact 26c _{2 having} a larger diameter than this, and when the stylet body 2 is crushed, they are deformed and contacted. .
In the present embodiment, a spiral contact is shown. However, for example, a cylindrical contact may be formed in a double manner so as to be contacted by deformation. The cylindrical shape may be a plate-shaped contact formed in a cylindrical shape, or a net-shaped contact formed in a cylindrical shape.
Also in the present embodiment, the other power cable 13c ₁ is previously brought into contact with the other electrode of the battery 14, but when the power cable 13c ₁ is not shielded, the power cable as shown in FIG. In order to avoid short circuit with 13c ₂ , it is desirable to wire inside the stylet body 2.
Even in the irreversible switches shown in FIGS. 4B and 4C, once the contacts 26b _{1 to} 26c ₂ are crushed and contacted to form a closed circuit, it cannot be released and power remains. The white LED 12 is lit as long as possible. For the contacts 26b _{1 to} 26c ₂ , it is desirable to employ easily deformable materials such as copper and aluminum.
By providing an irreversible switch as shown in FIGS. 4 (a) to 4 (c), it is possible to promote prevention of reuse of the stylet once used, and to reduce contamination infection in the medical institution. Can be prevented.

A method of using the stylet according to the present embodiment configured as described above will be described with reference to FIG.
A doctor, veterinarian or dentist, for example, holds the laryngoscope 22 in the left hand 24 and guides the catheter 10 and the stylet body 2 inserted into the catheter 10 into the trachea or esophagus with the right hand 25 while holding the tongue.
At that time, although not shown in the drawing, the friction force between the stylet body 2 and the catheter 10 is adjusted by adjusting the degree of expansion of the cuff 4 while slightly grasping the balloon 7 with the right hand 25. Alternatively, when the cuff 4 swells to a desired size, the air supply / discharge control mechanism as described above may be used to temporarily block the air from entering and exiting the cuff 4. As described above, the catheter 10 whose adhesion is increased by the cuff 4 is more smoothly intubated into the trachea or esophagus by covering the flexibility of the catheter 10 itself with the stylet body 2.

Further, in FIG. 5, the switch 6 is provided in the vicinity where the thumb is positioned when the stylet 1b is grasped so that the switch 6 can be easily pushed by the right hand 25. The installation location of the switch 6 is not limited to the illustrated position, and may be the end of the power supply unit 5. That is, the position does not matter as long as it is a place that does not hinder the treatment for the doctor, veterinarian or dentist.
In addition, the balloon 7 seems to face upward in the figure, but it is preferable that the balloon 7 is provided on the lower side so as to hold the stylet 1b while being wrapped in the right hand 25.
When the switch 6 is turned on and the light emitting part 3, which is a white light emitting diode provided at the end of the stylet body 2, is turned on, the catheter 10 can be intubated while observing the back of the oral cavity with the laryngoscope 22. Then, after the intubation of the catheter 10 is completed, the pressure of the balloon 7 is loosened, or the air supply / discharge control mechanism to the cuff 4 is released and the air in the cuff 4 is supplied to the balloon 7 to supply the cuff. By contracting 4, the stylet 1 b can be easily extracted from the catheter 10.
The switch 6 shown in FIG. 5 is a push button type as in FIG. 3, but it goes without saying that an irreversible switch is preferably used from the viewpoint of hygiene.

Finally, a stylet according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a cross-sectional view of a stylet according to the third embodiment. In FIG. 6, the same components as those in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted.
This stylet 1f uses a chemiluminescent material that emits light by mixing at least two kinds of chemicals as a light emitting means accommodated in the light emitting section 3. At least two kinds of medicines 19 and 20 and a partition wall 21 for separately containing these medicines are provided. The partition wall 21 is configured as a container that encloses and stores the medicine 20, but it may be a single wall that separates the light emitting part 3 instead of the container shape, or the medicines 19, 20 are placed inside the light emitting part 3. You may make it comprise as a container which wraps and accommodates each.
The drug 19 contains a reactive substance such as an oxalic acid derivative and a fluorescent substance that is excited by the reaction of the reactive substance. The medicine 20 contains a catalyst, hydrogen peroxide, and the like. The composition of the drug 19.20 may be reversed. In use, the light emitting part is folded with an existing tool, a dedicated jig, or a hand or finger to divide the partition wall 21 such as an internal glass ampule, and the chemicals 19 and 20 are mixed to cause a chemiluminescence reaction. It functions as a chemiluminescent material. Such chemiluminescence reaction reaches the maximum illuminance as soon as light is emitted, and the light emission is continued for, for example, about 5 to 30 minutes, or for at least 1 minute. In addition, it is good to prepare what adjusted the quantity of the chemical | medical agents 19 and 20 beforehand according to the intended purpose.
The stylet 1f according to the present embodiment breaks the partition wall 21 by applying pressure to the light emitting unit 3 from the outside, for example, an existing tool, a dedicated jig, or a hand or a finger, just before use, and chemiluminescence from the inside. The body 20 is leaked and mixed with the chemiluminescent body 19 to cause a luminescence reaction to obtain light.
Therefore, in particular, it is desirable that the exterior of the light emitting unit 3 has flexibility. It is desirable that the degree of flexibility is such that the internal partition wall 21 can be broken by the force of a human finger if possible.

In addition, as shown in FIG. 6, the stylet body 2 and the light emitting unit 3 may be configured separately, and the light emitting unit 3 may be configured to be attachable to the tip of the stylet body 2. Thus, by allowing only the light emitting unit 3 to be replaced, the stylet body 2 can be reused, which is economical. In the first place, when the catheter 10 is intubated using the stylet 1f, the stylet body 2 of the stylet 1f according to the present embodiment is covered with the catheter 10, so that the possibility of contamination due to contact with a living body is compared. On the other hand, since the light emitting unit 3 is provided at the end of the stylet body 2, the light emitting unit 3 is highly likely to come into contact with the oral cavity or the inner wall of the trachea during intubation, and is very likely to be contaminated. Therefore, it is rational that only the light emitting unit 3 provided at the tip of the stylet main body 2 is detachable and the light emitting unit 3 is disposable.
In addition, when especially preventing prevention of contamination infection etc., what is necessary is just to provide the light emission part 3 integrally in the stylet main body 2, and to make the stylet 1f disposable.
In this embodiment mode, light emission is obtained from a chemical reaction, so that a power supply circuit, a power source, and the like are unnecessary, and a simpler configuration can be provided, and an economical stylet can be provided.

As described above, the invention described in claims 1 to 5 of the present invention can be used as a stylet used in medical or veterinary medicine, but also enables quick and reliable intubation. It can also be used for nutrition tubes and urine tubes that can prevent infectious diseases.

It is a conceptual diagram of the stylet which concerns on the 1st Embodiment of this invention. It is a conceptual diagram of the stylet which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the stylet which concerns on the 2nd Embodiment of this invention. (A) thru | or (c) are all the cross-section figure which shows typically the irreversible switch of the stylet which concerns on the 2nd Embodiment of this invention. It is a use condition figure of the stylet which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the stylet which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a-1f ... Stylet 2 ... Stylet main body 2a ... Outer skin 2b ... Internal component 3 ... Light emission part 4 ... Cuff 5 ... Electric power supply part 6 ... Switch 7 ... Balloon 8 ... Tube 9 ... Stopper 10 ... Catheter 11 ... Power supply 12 ... White LED 13, 13a _{1 to} 13c ₂ ... Power cable 14 ... Battery 15 ... Bulkhead 16 ... Extrusion part 17 ... Lid part 18 ... Conductor 19, 20 ... Drug 21 ... Bulkhead 22 ... Laryngoscope 23 ... Mouth 24 ... Left hand 25 ... Right hand 26b _{1 to} 26c ₂ ... Contact

Claims (5)

A disposable stylet for inserting a catheter inserted into the trachea or esophagus from the oral cavity,
This stylet, possess a body portion formed of a linear body, a light emitting portion provided on one end portion of the main body portion, and a light emitting means for emitting the light emitting portion,
The main body is a linear body having flexibility and shape retention,
The light emitting unit includes a white LED having a color rendering property Ra of Ra ≧ 90,
The light emitting means includes a power supply for supplying power to the white LED, and a power supply circuit,
The stylet is characterized in that the power supply circuit includes an irreversible switch that cannot be disconnected once connected to a power source . A disposable stylet for inserting a catheter inserted into the trachea or esophagus from the oral cavity,
The stylet, possess a body portion formed of a linear body, a light emitting unit Ru set vignetting at one end of the main body portion, and a light emitting means for emitting the light emitting portion,
The main body includes a flexible resin internal structure and an outer skin containing the internal structure and having shape retention,
The light emitting unit includes a white LED having a color rendering property Ra of Ra ≧ 90,
The light emitting means includes a power supply for supplying power to the white LED, and a power supply circuit,
The stylet is characterized in that the power supply circuit includes an irreversible switch that cannot be disconnected once connected to a power source . The stylet of claim 1 or claim 2, characterized in that it has a cuff circumferentially provided on the main body portion. The stylet according to claim 3 , further comprising means for expanding and contracting the cuff. The stylet according to any one of claims 1 to 4 , wherein the main body portion is previously formed with a curve corresponding to an insertion target location.