JP2002263061A - Medical cannula - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cannula which enables quick mounting thereof with a simple operation along repeated use thereof and realize a less cost with a simple structure. SOLUTION: The cannula 1 is used being fitted into an operation hole in the operation under a laparoscope and is a cylindrical body integrally molded by the same material in which the inner circumference part is uniform in the inner diameter over the entire length thereof without protrusion. At the outer circumference part, a minimum outer diameter part 10, a large diameter part 11 with the outer diameter thereof larger than the allowable maximum inner diameter of the operation hole, a small diameter part 12 enough to leave a repulsive contraction force of the operation hole and a flange part 13 with the diameter the same as or larger than that of the large diameter part 11 are arranged successively through a gradient part in the order closer to the operation hole along the axial direction thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical mantle tube, and more particularly to a mantle tube used in a laparoscopic operation by being inserted into an operation hole.

[0002]

2. Description of the Related Art Laparoscopic surgery is used for surgery in the abdominal cavity or thoracic cavity. For example, instead of opening the entire abdomen, a minimally incised or perforated hole is opened and a laparoscope is inserted into the perforated hole. While inserting a treatment tool such as forceps or an electric scalpel and observing the inside of the abdominal cavity with a laparoscope, the affected organ is excised and removed from the body using the treatment tool. This surgical method is more frequently used in recent years because the surgical hole is small due to incision or perforation for the operation, so that post-operative recovery is quick and invasion of bacteria from the outside can be minimized. . In such an operation, an outer tube is inserted into a treatment hole and used to insert a treatment tool such as an endoscope, forceps, or an electric scalpel. 7 and 8 show examples of a conventional mantle tube. FIG. 7 shows a mantle tube (trocar) described in Japanese Patent Application Laid-Open No. 9-28666. After insertion into a body cavity, the mantle tube is expanded using a member that can be expanded and contracted to remove the mantle tube. In addition to being prevented, the mantle tube can be fixed.

[0003] The mantle tube 100 is mainly composed of a pipe 101a and a hollow tube portion 101b inserted through the pipe 101a. The hollow tube portion 101b has a hole 106 through which a treatment tool or the like can be inserted, and is slidably inserted into the pipe 101a. In addition, the pipe 101a and the hollow tube portion 101b are connected and fixed to each other at a distal end portion 107.

A plurality of slits 10 are provided in a pipe 101a.
4 are provided, and each part 102 divided by the slit 104 forms an expansion body 105.
After inserting the mantle tube 100 into the body cavity, the lock lever 1
When the base 03 is rotated to push down the base 108, FIG.
As shown in (b), each part 102 divided by the slit 104 bends and opens, the expansion body 105 expands, and the abdominal wall and the like are sandwiched and fixed between the base 108 and the expansion body 105. ing.

FIG. 8 shows another example of a conventional mantle tube. This mantle tube 200 is, for example, a fully open flat type 6-4174.
No. 4 publication, and the body-insertable cylindrical portion 2
03, a tube provided with a front balloon 201 and a rear balloon 202 is attached, and after inserting the front balloon 201 into a body cavity, as shown in FIG.
02, and between the two balloons 201 and 202,
The abdominal wall is sandwiched and fixed.

[0006]

However, the conventional mantle tube has the following problems. That is, in the mantle tube 100 as shown in FIG. 7, the provision of the expansion mechanism (the lock lever 103 and the expansion body 105) using a superelastic material complicates the structure and increases the cost. In addition, since the metal structure expands in the abdominal cavity and is fixed and prevented from coming off, there is a problem that the safety to the human body such as generation of a wound is low.

In the balloon method shown in FIG. 8, since the balloons 201 and 202 are attached to the body insertion tube 203, a step is formed between the tube 203 and the balloons 201 and 202, which hinders insertion. I was In addition, it is necessary to operate the front balloon 201 and the rear balloon 202,
The mounting of the mantle tube 200 was complicated. Furthermore, since the balloon is made of rubber, there is a problem that blood or the like easily adheres and cannot be used repeatedly.

[0008] The present invention has been made in view of such circumstances, and provides an outer tube that can be quickly mounted by simple operation, can be realized at a low cost with a simple structure, and can be used repeatedly. The purpose is.

[0009]

In order to achieve the above object, a medical mantle tube according to claim 1 of the present invention is a mantle tube used by being inserted into a treatment hole in laparoscopic surgery. There is a cylindrical body integrally molded from the same material, the inner peripheral portion of which has a predetermined same inner diameter over the entire length and has no protrusion, and the outer peripheral portion thereof is treated along the axial direction. In order from the closest to the hole, the minimum outer diameter part, the large diameter part whose outer diameter is smaller than the allowable maximum inner diameter of the treatment hole, the small diameter part that leaves repulsive contraction force of the treatment hole, and the diameter equal to or larger than the large diameter part Is characterized in that the collar portion is continuously provided via a gradient portion.

According to a second aspect of the present invention, in the outer tube according to the first aspect, the material of the tubular body is one of stainless steel and titanium.

According to a third aspect of the present invention, in the outer tube according to any one of the first and second aspects, the large-diameter portion has a plurality of relief grooves in a direction parallel or slightly inclined with respect to the axial direction of the cylindrical body. It is characterized by having been provided.

According to a fourth aspect of the present invention, in the outer tube according to the third aspect, the shape of the escape groove is an arc, a V-groove, a trapezoid, or the like.
It is characterized by being one of rectangular shapes.

According to a fifth aspect of the present invention, in the outer tube according to any one of the first to fourth aspects, a guide shaft which penetrates an inner peripheral portion of the tubular body and has a round protruding end at a tip for expanding a treatment hole is provided. It is characterized by having.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a component diagram showing an example of a medical mantle tube, and FIG. 2 is an overall assembly diagram. The mantle tube (trocar) includes a mantle tube 1 shown in FIG.
It comprises a cartridge seal valve 2 shown in (b) and a guide shaft 3 shown in (c).

The mantle tube 1 is a mantle tube 1 used by being inserted into an operation hole in laparoscopic surgery, and is a cylindrical body integrally formed from the same material, and has an inner peripheral portion having a full length. It is assumed that there is no protrusion with a predetermined same inner diameter over, and the outer peripheral portion is, in order from the side closer to the treatment hole along the axial direction,
The minimum outer diameter portion 10, the large diameter portion 11 having an outer diameter smaller than the allowable maximum inner diameter of the treatment hole, the small diameter portion 12 having a repulsive contraction force of the treatment hole, and the collar portion having the same diameter as or larger than the large diameter portion 10. 13 are connected continuously via a slope portion. The large diameter portion 11 is provided with a plurality of relief grooves 14 in a direction parallel or slightly inclined to the axial direction of the cylindrical body.

For example, the treatment hole is 12 mm to 15 mm in diameter.
Accordingly, the minimum outer diameter portion 10 corresponds to the diameter 20
mm, the large-diameter portion 11 has a diameter of 25 mm, the small-diameter portion 12 has a diameter of about 1.5 times the diameter of the treatment hole, and a diameter of 20 mm, and the collar portion 13 has a diameter of 30 mm, but is not limited thereto.

With such an outer peripheral portion, an abdominal wall or the like is formed at the position of the small-diameter portion 12 sandwiched between the large-diameter portion 11 and the brim portion 13, so that the mantle tube 1 can be naturally fixed without difficulty. it can. Further, the cost can be reduced because the structure is simple. Further, since the outer peripheral portion has a configuration in which the minimum outer diameter portion 10, the large diameter portion 11, the small diameter portion 12, and the brim portion 13 are connected to each other via a gradient portion, it can be smoothly inserted into the abdominal cavity. Also, since there are no protrusions, the safety to the human body is high.

Further, unlike the balloon method shown in FIG. 8, there is no step between the cylindrical portion and the balloon, so that insertion is easy. Further, since the operation of the front balloon and the rear balloon is not required, the mounting of the mantle tube is simple.

The cartridge seal valve 2 is mounted on the mantle tube 1 and has a function of hermetically sealing the insertion hole when a treatment tool such as forceps is not inserted.
Reduce the influence of outside air on the abdominal cavity. In addition, 20 in the figure is a two-way valve for sending carbon dioxide or the like from the treatment hole. The guide shaft 3 penetrates the inner peripheral portion of the tubular body of the mantle tube 1 and has a round protruding end 30 at its tip for expanding a treatment hole.

The outer tube 1 is made of stainless steel or titanium. Thereby, since the reactivity to the human body is low, the adverse effect on the human body is small, and the medical solution is hardly affected. Furthermore, since disinfection and sterilization can be easily performed, and blood and the like are hardly adhered, cleaning can be performed easily and can be used repeatedly. Also, if the material is titanium, it is lightweight.

3A and 3B are views for explaining the structure of the mantle tube. FIG. 3A is a sectional view of the appearance shown in FIG. 3B, and FIG. 3C is a sectional view taken along the line AA in FIG. As shown in the cross-sectional view of (a), the inner peripheral portion 15 of the cylindrical body has a predetermined same inner diameter and has no protrusion over its entire length, and a treatment tool such as forceps and a guide shaft 3 are provided. Is easy to pass through.

As shown in the sectional view of FIG. 2C, the large diameter portion 11 is provided with a plurality of relief grooves 14 in a direction parallel to or slightly inclined with respect to the axial direction of the cylindrical body. Thereby, the mantle tube 1 can move smoothly on the abdominal wall.

FIGS. 4 and 5 are views for explaining how the mantle tube 1 is attached. When the mantle tube 1 is inserted into the treatment hole in the abdominal wall A, the treatment hole is expanded by the round protruding end 30 of the guide shaft 3. By providing the guide shaft 3, the mantle tube 1 can be attached smoothly.

Then, as shown in FIG. 5, when the mantle tube 1 is inserted into the abdominal cavity and the abdominal wall A comes to the small diameter portion 12, the attachment is completed, the guide shaft 3 is removed, and the treatment tool is inserted into the abdominal cavity. Make it possible.

Next, the relief groove 1 provided in the large diameter portion 11 is provided.
4 will be described. As shown in the cross-sectional view of FIG. 6, the shape of the relief groove 14 includes an arc shape ((a), (b)), a V groove shape ((c)), a trapezoidal shape ((d)), and a square shape ( (E)). If the shape of the escape groove 14 is determined in this way, the mantle tube 1 can be easily manufactured.

[0026]

As can be understood from the above description, in the mantle tube according to each of claims 1 to 5 of the present invention,
The outer peripheral portion of the cylindrical body has a minimum outer diameter portion, a large diameter portion having an outer diameter smaller than the allowable maximum inner diameter of the treatment hole, a small diameter portion which is large enough to leave a repulsive contraction force of the treatment hole, and a large diameter portion, in order from the side closer to the treatment hole. Since the collar part with the same diameter or larger diameter than the diameter part is continuously connected via the slope part, the abdominal wall etc. come at the position of the small diameter part sandwiched between the large diameter part and the collar part, and the outer tube is Can be fixed.

Further, the cost can be reduced because the structure is simple. In addition, since the outer peripheral portion has a configuration in which the minimum outer diameter portion, the large diameter portion, the small diameter portion, and the brim portion are continuously provided via the slope portion, insertion is easy and safety to the human body is high. Also, since only the operation of insertion is sufficient, the mounting of the mantle tube is simple.

In particular, in the second aspect, since the material of the cylindrical body is either stainless steel or titanium, the adverse effect on the human body is small, and the cylindrical body is hardly affected by the chemical solution. Furthermore, since disinfection and sterilization can be easily performed, and blood and the like are hardly adhered, cleaning can be performed easily and can be used repeatedly.

In the third aspect, the large diameter portion is provided with a plurality of relief grooves in a direction parallel or slightly inclined to the axial direction of the cylindrical body, so that the tissue of the abdominal cavity can expand and contract appropriately. As a result, the mantle tube can be smoothly inserted into and removed from the abdominal wall, and can be prevented and fixed. In the fourth aspect, the shape of the relief groove is any one of an arc shape, a V-groove shape, a trapezoidal shape, and a rectangular shape. Therefore, if the shape is determined, the mantle tube can be easily manufactured.

According to claim 5, the inner peripheral portion of the cylindrical body is penetrated,
Since the guide shaft is provided with a round protruding end for expanding the treatment hole at the distal end, the mantle tube can be smoothly attached.

[Brief description of the drawings]

FIG. 1 is a component diagram showing an example of a mantle tube of the present invention.

FIG. 2 is an overall assembly view showing an example of a mantle tube of the present invention.

FIG. 3 is a structural explanatory view of a mantle tube of the present invention.

FIG. 4 is a diagram illustrating attachment of a mantle tube of the present invention.

FIG. 5 is a diagram illustrating attachment of a mantle tube of the present invention.

FIG. 6 is a diagram illustrating the shape of a relief groove.

FIG. 7 is a diagram showing an example of a conventional mantle tube.

FIG. 8 is a view showing another example of a conventional mantle tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer tube 3 Guide shaft 10 Minimum outer diameter part 11 Large diameter part 12 Small diameter part 13 Flange part 14 Relief groove 15 Inner peripheral part

Claims (5)

[Claims] 1. A mantle tube used in a laparoscopic operation by being inserted into a treatment hole, and is a cylindrical body integrally formed from the same material, and an inner peripheral portion extends over the entire length thereof. It is assumed that there is no protrusion with a predetermined same inner diameter, and its outer peripheral portion has a minimum outer diameter portion, a large diameter of an outer diameter smaller than an allowable maximum inner diameter of the treatment hole, in order from the side closer to the treatment hole along the axial direction. A medical jacket, wherein a small-diameter portion enough to leave repulsive contraction force of the treatment hole, and a collar portion having a diameter equal to or larger than the large-diameter portion are connected via a gradient portion. tube. 2. The medical mantle tube according to claim 1, wherein the material of the tubular body is one of stainless steel and titanium. 3. The outer tube according to claim 1, wherein the large-diameter portion is provided with a plurality of relief grooves in a direction parallel or slightly inclined to an axial direction of the cylindrical body. A medical mantle tube characterized by the following. 4. The medical mantle tube according to claim 3, wherein the shape of the relief groove is any one of an arc shape, a V groove shape, a trapezoidal shape, and a square shape. 5. The mantle tube according to claim 1, further comprising a guide shaft that penetrates an inner peripheral portion of the cylindrical body, and has a round protruding end at a distal end for expanding the treatment hole. A medical mantle tube characterized by the following.