JPS6211441A - Body inserting tube for laser operation - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to an intracorporeal insertion tube suitable for use during laser surgery.

Conventional lasers used in medical treatment include krypton laser, argon laser, Nd-YAGv --t7
There are many types of lasers, such as '-1 carbon dioxide laser, which are used for diagnosis, treatment, surgery, etc. depending on their optical characteristics. These lasers, which can emit medium to high energy, are used for cauterizing affected areas, stopping bleeding, and for scalpel use. However, when using a high-energy laser, there is a risk that normal body tissue other than the affected area may be damaged due to mistaken firing. In particular, carbon dioxide lasers are suitable for use as laser scalpels because they are capable of high output, but since their wavelengths are in the infrared region, they cannot be visually recognized, making it extremely difficult to prevent accidental firing.

If a laser is accidentally fired into normal tissue of the human body, it will cause burns in that area, no matter how short the time.

However, the most dangerous accidental firing occurs when a laser is accidentally fired into the endotracheal tube when performing surgery with a laser scalpel using an internally inserted tube such as an endotracheal tube.

Endotracheal tubes are made of flexible polyvinyl chloride resin or crecone rubber, but if an endotracheal tube made of polyvinyl chloride resin is accidentally injected into the endotracheal tube, the part immediately burns and decomposes, creating a hole and destroying normal tissue. It is damaging and the decomposition of the resin not only produces combustion gases but also extremely toxic chlorine gas. Moreover, when general anesthesia is administered using an endotracheal tube, the oxygen flowing through the endotracheal tube may ignite.

Extremely dangerous. If the endotracheal tube is made of silicone rubber, there is no danger from the generation of chlorine gas, but the remaining dangers are the same as with vinyl chloride resin.

The above is a description of the most dangerous troubles associated with endotracheal tubes; however, when an intratracheal tube other than an endotracheal tube is used, accidentally firing a laser at the tube can also burn out the tube. It is no different from an endotracheal tube in that it damages normal tissue in the human body from this location.

Previously, in order to prevent damage to the endotracheal tube due to the accidental firing of laser beams, it has been proposed to protect the tube surface by wrapping it with aluminum tape or the like. However, aluminum tape is easy to twist (and the edges of the tape are sharp, so there is a risk of damaging the tracheal mucosa.Furthermore, there is the problem that the tape cannot be wrapped around the cuff of the endotracheal tube.In the case of carbon dioxide laser Since it is well absorbed by water, it can be treated by applying wet gauze to the cuff, but this is complicated and extremely troublesome to operate.

Additionally, this technique is ineffective with other lasers currently used in surgery, such as Nd-YAG lasers and argon lasers.

Purpose The present invention has been made in order to eliminate the drawbacks of the above-mentioned prior art. The purpose of the present invention is to provide a tube suitable for insertion into the body.

Structure The present inventor has conducted extensive research to achieve the above object, and has found that in a tube for insertion into the body, at least the portion of the tube that is likely to be in danger due to erroneous laser emission is made of fine metal powder or fine ceramic powder. It has been found that the above object can be achieved by providing a tube for insertion into the body for use in laser surgery, which is also made of silicone rubber containing at least one of the following: and a black pigment.

The present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view showing a tube 1 for insertion into the body for laser surgery made of silicone rubber containing at least one of a fine metal powder, a fine ceramic powder, and a black pigment according to the present invention.

FIG. 2 is a cross-sectional view of the tube l shown in FIG.
It also consists of a single layer of extruded silicone rubber uniformly containing .

FIG. 3 is a cross-sectional view of a tube obtained by coextruding two layers of a silicone rubber layer 2 containing a fine metal powder and/or a fine ceramic powder and a silicone rubber layer 3 containing a black pigment. The effect of the present invention is similarly exhibited regardless of the order in which the two layers are provided, but when using white metal powder that easily reflects laser light, a silicone rubber layer containing a black pigment is placed on the outside. is preferable.

FIG. 4 is a perspective view showing a configuration example when the present invention is applied to an endotracheal tube, and FIG. 5 is a sectional view taken along the Ta-Ta line in FIG. 4. At least based on the mm of the laser (the potentially dangerous area 17 consists of the tube of the present invention, which may also be made of fine metal powder, fine ceramic powder, and silicone rubber containing at least one of black pigments). Of course, the entire tube body 11 may be made of the tube of the present invention.At least a portion of the tube body 11 may be reinforced with a coil or mesh-like reinforcing material.

In this example, the area 17 where it is necessary to prevent erroneous laser emission is about 20 CI from the tip of the tube body 11 including the cuff 13.
It can be longer if necessary. In FIG. 4, 19 is an air introduction pipe, 21 is a Neulot no 5 rune, and 23 is an air introduction port.

Metal powders used in the present invention to impart laser beam resistance, heat resistance and durability to the silicone rubber body include silver, stainless steel, nickel, titanium, tungsten, tantalum, aluminum, etc. Examples include fine ceramic powders such as zirconia, silicon nitride, silicon carbide, zircon, silicon dioxide, silicates, and alumina.
These may be used alone or in combination. In addition, these fine powders are 0 for xooif< parts of silicone rubber.
．． It is appropriate to blend 1 to 80 parts by weight, preferably 5 to 50 parts by weight.

Further, examples of the black pigment used in the present invention to prevent reflection of laser light include Carne Black and fine graphite powder. The black pigment is suitably blended in an amount of 0.1 to 80 parts by weight, preferably 5 to 50 parts by weight, per 100 parts by weight of silicone rubber.
As the material for the tube, silicone rubber, vinyl chloride, etc. are used, and silicone rubber is particularly preferred.

Furthermore, the resistance to laser light may vary by simply coating the surface of a silicone rubber tube with the metal fine powder, ceramic fine powder, and black pigment using an appropriate coating method such as dipping, but the object of the present invention is to is achieved.

Effects The tube for insertion into the body of the present invention is resistant to laser light and does not reflect laser light.

Therefore, the tube is highly safe because it does not cause serious problems due to the tube's frame structure due to erroneous ejection of laser light, and it does not damage human tissue. Furthermore, the inherent flexibility of the tube is not impaired, so it is easy to use.

Next, the present invention will be explained in more detail with reference to the following examples using an endotracheal tube as an example.

Example 1 Silicone rubber KE 174-UZo manufactured by Shin-Etsu Chemical Co., Ltd.
3 parts by weight of stainless steel SO8316-L fine powder
After adding 0 parts by weight and thoroughly kneading, crosslinking agent C-153A
3 parts by weight, 3 parts by weight of control agent X-93-0720, and 3 parts by weight of platinum catalyst
Prepare the compound for the layer (inner layer). Next, cross-linking agent
-06517 Heavy duty part and platinum catalyst X-93-0010, 1
A compound for the second layer (outer M) of the endotracheal tube body is prepared by adding each part by weight and thoroughly kneading with a roll in the same manner. The inner layer is made of silicone rubber made of stainless steel 5US316-L fine powder, and the outer layer is made of silicone rubber containing Kerr 2 Knob Black. I created a two-layer Teyuso.

On the other hand, the cuff is made of tone silicone silicone rubber 8
Ste/res 5US3 for E1184'1100it part
After adding 20 parts by weight of 16-L fine powder and 5 parts by weight of silicone oil kKF-96H12,500am manufactured by Shin-Etsu Chemical Co., Ltd., and thoroughly kneading with a roll, vulcanizing agent RC-2 was added to Lz
Add X amount and extrude it using a 50+am extruder to create a cuff tube with an inner diameter of approximately 11.2 mφ and an outer diameter of approximately 11.6 mφ, and cut it into a length of approximately 3.8 cIL to make an endotracheal tube. Place the cuff at a position approximately 1.51 mm from the tip of the tube body using tone silicone RTV silicone rubber 5H78.
I attached it by gluing it in step 1. Then, insert the air introduction tube with the pilot balloon about 2 inches from the tip of the tube body.
An endotracheal tube with a two-layered tube body was prepared by gluing it in the same manner at the 0° position. Inflate the cuff of the intratracheal tube and use Shin-Etsu Chemical Co., Ltd., which contains Zen black.
A cuffed endotracheal tube was prepared by dipping a liquid silicone rubber KE1941140JF into a diluted coating liquid by adding 750% toluene and curing with heating.

Example 2 Silicone rubber K11l: 174U1 manufactured by Shin-Etsu Chemical Co., Ltd.
00 parts by weight, 20 parts by weight of tungsten fine powder and 22,210 parts by weight of Kardump were added, and after thorough mixing, crosslinking agent C was added.
-153A 3 parts by weight, control agent X-93-0720,
After adding 3 parts by weight and 3 gii parts of platinum catalyst
Extrusion molded using an extruder, inner diameter approximately a, 6mφ outer diameter approximately 11.
A single-layer tube with a cuff inflation fluid passage of 8 smφ and approximately 0.6 φ was prepared. On the other hand, 100 parts by weight of Dow Corning silicone rubber (Q7-4735) was added to Shin-Etsu Chemical's silicone oil KF-96H1.
After adding 5 parts of 2,500 cm, 20 parts by weight of fine tungsten powder, and 5 parts by weight of carmen black, and thoroughly kneading with a roll, extrusion molding was performed using a 50 mφ extruder to form an inner diameter of approximately 1λO.
A cuff tube with an outer diameter of approximately 124 mmφ was prepared. Next, inflate the cuff of the endotracheal tube made by gluing it in the same manner as in Example 1, and use liquid silicone rubber manufactured by Shin-Etsu Chemical Co., Ltd. (KE1941) containing the car 2 knob bracket.
100F stainless steel 8US316-L fine powder 10
．． After adding 9 and thoroughly kneading, add 650yLt of toluene.
In the same manner as in Example 1, the tube was dipped in a coating solution diluted in addition to '1, and cured by heating to prepare an endotracheal tube with force Z.

Example 3 Silicone rubber KB174UZoo manufactured by Shin-Etsu Chemical Co., Ltd.
After adding 35 parts by weight of Stair VX SUS 316-L fine powder to the parts by weight and thoroughly kneading, crosslinking agent C-1
3 parts by weight of 53A, 20.3 parts by weight of control agent X-93-07, and 0.03 parts by weight of platinum catalyst The inner diameter is approximately 8.5mφ and the outer diameter is approximately 11.9m.
A single layer of tubing was created with a cuff inflation fluid passageway of approximately 0.6 mφ in diameter. On the other hand, the cuff is silicone rubber 8 manufactured by Tone Silicone ■, 100 parts by weight of 11B4, 25 parts by weight of stainless steel 5t7S 316-Lm powder, and silicone oil KF-96H12500 manufactured by Shin-Etsu Chemical ■.
After adding 11 parts of 5g cm and thoroughly kneading with a roll, 1.2 parts by weight of vulcanizing agent (Re-2) was added and extrusion molded using a 50 φ extruder to form a mixture with an inner diameter of about IZ1wemφ and an outer diameter of about 125II.
A force 2 tube of Ilφ was prepared and adhered in the same manner as in Example 1 to prepare an endotracheal tube. Inflate the cuff of the intratracheal tube in the same manner as in Example 1, add 5.9 g of stainless steel 5UB316-L fine powder to KE1300T 100.9 silicone rubber manufactured by Shin-Etsu Chemical Co., Ltd., mix thoroughly, and add 600 g of toluene. In addition, it was dipped in the diluted coating liquid in the same manner as in Example 1 and cured by heating.
A cuffed endotracheal tube was created.

The endotracheal tube of the present invention obtained as described above, and a silicone rubber endotracheal tube containing no filler such as metal powder, ceramic powder, or black pigment as a comparative example, Do
Were (Comparative Example 1) and soft vinyl chloride endotracheal tubes and For-Tex (Comparative Example 2) were prepared.
Parts of these tube bodies and cuffs were cut out to prepare test pieces.

These test pieces were irradiated with laser pulses to the same point under the following irradiation conditions, and the number of irradiations until the perforation was completed was compared.

Laser: Carbon dioxide laser, Mo manufactured by Japan Infrared Industry ■
d@l 60 Z Irradiation angle = 90 degrees Beam diameter: 1 m Laser output Crab tube body: 50 W O, 1 second Cuff section: 5 W O, 05 seconds The results obtained are shown in the table below.

Table 1

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a tube for insertion into the body for laser surgery according to the present invention. FIG. 2 is a sectional view of FIG. 1, showing a cross section of a tube made of a single layer of silicone rubber uniformly containing at least 1 m of fine metal powder, fine ceramic powder, and black pigment. FIG. 3 is a cross-sectional view of a tube for insertion into the body for laser surgery obtained by co-extruding two layers of a silicone rubber layer containing a fine metal powder and/or a fine ceramic powder and a silicone rubber layer containing a black pigment. . FIG. 4 is a perspective view showing an embodiment in which the present invention is applied to an endotracheal tube, and FIG. 5 is a sectional view taken along line nu in FIG. 4. l...Single-layer laser surgery tube for insertion into the body 2.
... Silicone rubber layer containing fine metal powder and/or fine ceramic powder 3 ... Silicone rubber layer containing black pigment 11 ... Tube body 13 ... Cuff 19 ... Air introduction tube 21 ... Pilot balloon 23...Air inlet patent applicant Fuji Systems Co., Ltd. 1st Depth

Claims (1)

[Scope of Claims] 1. In a tube for insertion into the body, at least a portion of the tube that may be at risk due to erroneous laser emission is
A tube for insertion into the body for use in laser surgery, characterized by being made of silicone rubber containing at least one of a fine metal powder, a fine ceramic powder, and a black pigment. 2. The tube for insertion into the body is an endotracheal tube, an intrarectal insertion tube, an intrathoracic insertion tube, an intraperitoneal tube,
The tube according to claim 1, which is any one of a gastrointestinal tube, an intraoral tube, and an intracranial tube. 3. The tube according to claim 1, wherein the tube for insertion into the body is a tubular object inserted into the vagina or the uterus. 4. The tube according to claim 1, wherein the tube for insertion into the body is a catheter. 5. The metal fine powder is silver, titanium, tungsten,
Claim 1, which is selected from fine powders of tantalium, aluminum, stainless steel and nickel.
Tube for insertion into the body as described in section. 6. The tube for insertion into the body according to claim 1, wherein the ceramic fine powder is selected from fine powders of zirconia, silicon nitride, silicon carbide, zircon, silicon dioxide, silicates, and alumina. . 7. The tube for insertion into the body according to claim 1, wherein the black pigment is selected from carbon black and fine graphite powder. 8. The physical strength insertion tube according to claim 1, wherein the tube is extruded. 9. The tube for insertion into the body according to claim 1, wherein the tube is obtained by co-extruding silicone rubber containing fine metal powder and/or fine ceramic powder and silicone rubber containing black pigment. .