JP3785557B2 - Valve for medical device - Google Patents

Description

[0001]
[Industrial application fields]
2. Description of the Related Art A catheter introducer that allows a catheter to pass through a blood vessel incorporates a valve that prevents leakage of blood in the blood vessel to the outside of the body when a catheter, an expansion capillary, or the like is inserted. The present invention relates to a valve for a medical device that stops leakage of a fluid such as blood in a state where a catheter, an injection needle, or the like penetrates a patient's blood vessel, such as a valve built in a catheter introducer.
[0002]
[Prior art]
FIG. 8 is a diagram illustrating the configuration of a conventional catheter introducer valve, FIG. 9 is a diagram illustrating the configuration of another conventional valve, and FIG. 10 is a diagram illustrating the configuration of another conventional valve. A valve described in Japanese Patent No. 170966 is shown.
In FIG. 8 , 11 to 13 are three valve membranes made of an elastic material. 11a is a slit, 12a is a small hole, and 13a is a U-shaped groove, which are formed in the valve membrane bodies 11 to 13, respectively. The three valve membrane bodies 11 to 13 are stacked to constitute a catheter introducer valve.
[0003]
In the conventional valve shown in FIG. 8 , valve bodies 11 to 13 are stacked, and a catheter, an expansion capillary, etc., not shown, are inserted through the introducer at the position of the slit 11a of the uppermost valve body 11. The inserted catheter pushes open the slit 11a of the first valve body 11 and pushes out the tongue 12a surrounded by the U-shaped groove 13a of the last valve body 13 while expanding the small hole 12a of the next valve body 12. Penetrated. The distal end of the penetrated catheter is inserted into the blood vessel, and a necessary medical treatment such as imaging is performed.
[0004]
The outer periphery of the catheter inserted into the blood vessel is pressed against the elastic force and the contact surface in different directions by the valve membrane bodies 11 to 13 sequentially. In this way, accidents in which blood in blood vessels flows backward and flows out of the body are prevented. At this time, a lubricant is usually applied in the vicinity of the sliding portion so that the contact portion of each valve membrane body 12 smoothly follows the sliding movement of the catheter as the catheter is inserted and pulled out. It has been broken.
[0005]
Moreover, 14a of FIG. 9 is a bowl-shaped recessed part, 14b is a slit, 14c is a small hole. The recess 14a and the slit 14b are formed on the upper surface and the lower surface, and the center of the recess 14a and the center of the slit 14b are connected by the small hole 14. Furthermore, the valve body 15 shown in FIG. 10 is formed by forming straight slits 15a and 15b orthogonal to each other on both sides by crossing the middle.
[0006]
The same material as that of FIG. 8 is used for the valve membrane bodies 14 and 15 of the valves of FIGS. 9 and 10 , and the functions of the three valve membrane bodies 11 to 13 of FIG. 8 are integrated into one. . In the case of a valve consisting of 9 and a conventional single valvular body functions aggregate type shown in FIG. 10, and FIG. 8 by the structure of the small hole 14c and the slit 14b and the slit 15a and 15b which crossed a part It is designed to prevent blood from leaking out of the body in almost the same way.
[0007]
[Problems to be solved by the invention]
In general, the following conditions can be mentioned as conditions to be provided for the function of this type of valve.
(1) When a linear member with a different outer diameter is inserted, such as a small-diameter guide wire and a thick outer dilator, the valve membrane and the linear member are in close contact with each other, and there is no gap between them. There are no leaks.
[0008]
(2) When the linear member is inserted and removed or rotated and slid in the inserted state of the linear member having different outer diameters such as the guide wire and the dilator, the insertion portion of the valve membrane body and the outer periphery of the linear member are The sliding resistance should be as small and uniform as possible.
(3) When a linear member such as a guide wire is inserted into or removed from a valve membrane body made of an elastic material, the insertion portion of the valve is quickly and elastically closely following and deformed so that fluid such as blood does not leak. .
[0009]
(4) When a linear member such as a guide wire is not inserted into the valve body of the elastic material, the valve is elastically restored to the closed state, and the flow of fluid such as blood is stopped and closed. That.
(5) In connection with the above (1) to (4), the deterioration of the elastic characteristics of the contact portion of the valve member of the elastic material is prevented, and the liquid tight function of the valve member is maintained for a long time.
[0010]
On the other hand, as described above, a conventional valve for a medical instrument simply applies a lubricant to the vicinity of the insertion portion of the valve membrane body. Therefore, if the catheter is twisted and rotated repeatedly as the catheter is attached and detached and the catheter is operated, the lubricant is obstructed by the contact portion of the liquid-tight structure, and the lubrication function cannot be sufficiently exerted. For this reason, not only is the lubricant consumed unnecessarily, but the friction at the contact portion increases, causing the elastic restoring characteristics of the contact portion of the valve membrane body to deteriorate and a large amount of blood to flow out of the body. There was a point.
[0011]
The present invention has been made to solve the problems of the conventional valve for medical devices, and the lubricant is gradually contacted by storing the lubricant in the groove formed on the plate surface of the valve body. The contact part of the valve body is smoothly displaced by following the sliding of the linear member to maintain the function of preventing leakage of fluids such as blood. The object is to realize a valve for a long-life medical device.
[0012]
[Means for Solving the Problems]
The present invention relates to a plate-like medical instrument made of an elastic material that fluidly seals and slides a linear member inserted with a lubricant interposed in an insertion portion provided in the thickness direction near the center. In the valve for
The plate surface of the valve, with the pre-Symbol lubricant plurality of angular groove or a plurality of triangular inclined groove insertion portion side is deep inclined for causing the storing is recessed from the plate surface as the plane remains in portions other than the grooves through The valve for medical devices formed so that it may extend radially from the part toward the peripheral direction is comprised.
Moreover, the valve for medical devices which provided the some square groove or the some triangular inclination groove | channel on the both plate | board surface of the valve | bulb was comprised.
[0013]
Furthermore, the present invention provides a plate-like material made of an elastic material that slides a linear member inserted in a liquid-tight manner through a insertion member provided in the thickness direction near the center with a lubricant interposed therebetween. In valves for medical devices,
With the insertion part as a polygonal hole, the hole side for storing lubricant from the hole toward the peripheral direction has a plurality of square grooves or a plurality of triangular inclined grooves that are deeply inclined. It consists of a first disk made of an elastic material that is more recessed and formed radially, a second disk made of an elastic material whose insertion part is a circular hole, and an elastic material whose cutting part intersects the insertion part. A third disk and a plurality of square grooves or a plurality of triangularly inclined grooves with a deeply inclined hole side for storing the lubricant in the peripheral direction from the hole as a polygonal hole in a plane other than these grooves. And a fourth disk made of an elastic material that is radially recessed so as to remain , and the first to fourth disks are sequentially stacked in layers to form a laminated shape. A valve is constructed.
[0014]
[Action]
In the present invention, the stored lubricant is supplied to the gap between the insertion portion of the valve body and the inserted catheter along the plurality of square grooves or the plurality of triangular inclined grooves that are deeply inclined on the insertion portion side. In addition to reducing the friction, it is possible to always maintain the liquid tightness of the contact surface. Further, a plurality of square grooves or a plurality of triangular inclined grooves are formed so as to be recessed from the plate surface of the valve body so that a flat surface remains in a portion other than the grooves and extend radially from the insertion portion toward the peripheral direction. Since the lubricant is stored in the plurality of square grooves or the plurality of triangular inclined grooves formed as described above, the lubrication of the insertion portion is maintained for a long time. At the same time, due to the plurality of square grooves or the plurality of triangular inclined grooves formed on the plate surface of the valve body , the insertion part side becomes thinner, and the flexibility of the valve body is increased.
[0015]
Further, in the present invention, the valve body of the valve has a plurality of square grooves or a plurality of triangular inclined grooves with a deeply inclined hole side for storing the lubricant from the hole toward the peripheral direction with the insertion portion as a polygonal hole. A first disk made of an elastic material that is recessed from the upper surface side so that a flat surface remains in a portion other than the grooves, and a second disk made of an elastic material having a circular hole as an insertion portion; A third disk made of an elastic material having a cutting layer intersecting each other, and a plurality of square grooves with deeply inclined holes on which the lubricant is stored from the hole toward the peripheral direction with the insertion part as a polygonal hole or A plurality of triangularly inclined grooves, and a fourth disk made of an elastic material that is radially formed by recessing from the lower surface side so that a flat surface remains in a portion other than these grooves, and the first to fourth disks are sequentially which is configured to multilayered stacked in layers, With molding becomes easy Lube, lubrication of the insertion portion is long-lasting. In addition, since the lubricant infiltrates into the gaps between the stacked valve bodies, the lubrication function is enhanced and the prevention of fluid leakage can be improved. In particular, if an oil groove or an oil hole for allowing the lubricant to flow through the valve body is provided, the lubricant can be supplied to most sliding surfaces of the insertion part of the valve body. Therefore, a smooth restoring function of elastic deformation of the valve main body accompanying insertion of a linear member such as a catheter is maintained for a long period of time, and a valve for a medical instrument having a significantly long life is realized.
[0016]
【Example】
Example 1.
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective explanatory view in which a part of the first embodiment of the present invention is cut, FIG. 2 is a plan view of the first embodiment, FIG. 3 is a cross-sectional view taken along the line AA of FIG. is there.
1-4, 1 is a valve | bulb and 2 is a valve body which comprises the valve | bulb 1. FIG. The valve body 2 is made of an elastic material that has appropriate flexibility and elastically deforms when an external force is applied, and quickly restores the original shape when the external force is removed.
[0017]
For the valve body 2, a material having a high resilience such as a polyurethane elastomer, a polyamide elastomer, a synthetic rubber such as silicon rubber or fluorine rubber, or a natural rubber is suitable. As shown in FIG. 1, the valve body 2 has plate surfaces 2a. It is formed in a disk shape having 2b.
[0018]
3 is above the center of the valve body 2. Square holes 4 a provided on both lower sides are square grooves formed radially from these square holes 3. The upper and lower square holes 3 are formed on the plate surfaces 2a. The groove 4a is drilled at a different depth from 2b, and the square groove 4a is formed so as to be inclined so that the center side becomes deep halfway, leaving a flat surface in the peripheral portion. That is, as shown in FIGS. 1 to 4, the square groove 4 a has a plate surface 2 a. It is formed to be recessed from 2b. In addition, each corner portion 41 at the intersection of the square groove 4a is rounded in an arc shape so that the catheter or the like can be easily guided when the catheter is inserted into the valve body 2 described later.
[0019]
5 is a small circular hole provided at the center of the axial center OO of the valve body 2, and 6 is a cut formed in the axial direction by connecting to the small circular hole 5 and crossing in a cross shape at different depths. Is a layer. Both sides of the small hole 5 and the cutting layer 6 face the upper and lower square holes 3, 3. And the said square groove 4a comprises the storage part of a lubricant so that it may describe in operation | movement description. The radius of the small hole 5 and the length of the cutting layer 6 in the radial direction are selected in accordance with the thickness of the expansion capillary or catheter to be described later.
[0020]
FIG. 5 shows an application example of the valve 1 of the first embodiment of the present invention.
In FIG. 5, reference numeral 7 denotes a catheter introducer, and 8 denotes a main body of the catheter introducer 7. 8a is a cylindrical passage provided in the main body 8 , 8b is a flexible tube, and 8c is a connecting tube. 9 is a cap fitted to the rear part of the main body 8, and 10 is a catheter. As shown in the drawing, the valve 1 of the first embodiment is attached to the rear portion of the main body 8 so that the periphery of the valve 1 is sandwiched by the cap 9 and the vicinity of the central portion surrounding the square holes 3 and 3 can be displaced. . 11 is a lubricant (FIG. 1).
[0021]
The operation of the first embodiment of the present invention having such a configuration will be described next.
Although not shown, prior to use of the catheter introducer 7, a hollow injection needle inserted through the inner needle is inserted into the blood vessel through the skin. After the injection needle is inserted to a predetermined position, the inner needle is removed and the guide wire is inserted, and the injection needle is also removed and the guide wire is placed in the blood vessel.
[0022]
Next, a tapered dilatation tube (not shown) inserted through the passage 8a of the catheter introducer 7 shown in FIG. 5 is fitted so as to cover an external portion of the guide wire placed in the blood vessel. The Subsequently, the distal end of the expansion thin tube fitted to the guide wire is inserted into the blood vessel wall using the hole into which the guide wire is inserted, and the flexible tube 8b at the distal end of the main body 8 is attached while expanding the insertion hole. Introduce into the blood vessel. At this time, blood flows into the passage 8a inside the valve body 2, and the passage 8a of the main body 8 is communicated with the blood vessel through the inflowing blood.
[0023]
After the introduction of the flexible tube 8b, the expansion tube and the guide wire are pulled out, and the catheter 10 is inserted into the catheter introducer 7 from the rear portion of the main body 8 through the valve body 2 and penetrates the main body 8. The catheter 10 penetrating the main body 8 is guided to the flexible tube 8b and then guided into the blood vessel. Then, medical treatment such as angiography is performed after the distal end of the catheter 10 reaches a predetermined processing position in the blood vessel.
[0024]
In this case, after the flexible tube 8b is introduced into the blood vessel as described above, the passage 8a inside the valve body 2 communicates with the blood vessel through the blood. Therefore, unless the insertion portion of the valve body 2 is elastically quickly restored following the insertion / extraction of the expansion tube or the insertion operation of the flexible tube 8b, the outer periphery of the expansion tube or flexible tube 8b and the valve body A gap is formed between the two and blood in the blood vessel flows out of the body.
[0025]
On the other hand, as described above, in order to reduce the friction between the contact portion of the valve body 2 and the catheter 10 and to make the elastic deformation recovery function of the valve body 2 smooth, a lubricant is applied to the contact portion of the valve body 2 and the catheter 10 or the like. 11 is used.
In the first embodiment of the present invention, as already described, the square grooves 4a are formed in a radial pattern inclined from the upper and lower central square holes 3 and 3 of the disc-like valve body 2. And the valve | bulb which stores the lubricant 11 for lubricating a contact part in these square grooves 4a is comprised.
[0026]
For this reason, since the lubricant 11 is stored in the square groove 4a, the lubrication of the insertion portion is maintained for a long time. At the same time, since the square groove 4a is formed on the plate surface of the valve body 2, the insertion portion is made thinner so that the flexibility of the valve body 2 is increased. Further, since the stored lubricant 11 is supplied to the gap between the insertion portion of the valve body 2 and the inserted catheter 10 along the inclined radial angular groove 4a, the friction between the valve body 2 and the catheter 10 is reduced. Or it can always maintain the liquid-tightness of the contact surface.
[0027]
Example 2
FIG. 6 is an exploded perspective view with a part cut away showing the configuration of the second embodiment of the present invention.
In FIG. 6, 21, 22, 23 and 24 are first to fourth valve bodies. The valve body 21 is formed with a large square hole 3 and a square groove 4a corresponding to the configuration of the first embodiment, and a small circular hole 5 is similarly provided in the center of the valve body 22. Further, the valve body 23 is provided with a cutting layer 6, and a small square hole 3 and a square groove 4 a on the lower surface side are formed in the valve body 24 in the same manner as in the first embodiment. In the second embodiment, the valve body 2 is configured in a laminated structure by the first to fourth valve bodies 21 to 24.
[0028]
Also in the second embodiment shown in FIG. 6, the operation is hardly different from the first embodiment. In the second embodiment, since the valve body 2 of the valve 1 is configured as a laminated type, the valve 1 can be easily molded. Further, since the lubricant 11 infiltrates into the gaps between the stacked valve bodies, the lubrication function is enhanced and the prevention of fluid leakage can be improved. In particular, as shown by the broken line in FIG. 6 (omitted in FIG. 7), if the oil groove 25 and the oil hole 26 are provided in the valve body 2, the lubricant 11 is supplied to the vicinity of the insertion portion of the valve body. Can do. As a result, there is an advantage that a valve for a medical instrument having a remarkably long life can be realized by maintaining the elastic follow-up function of the valve body accompanying the insertion of the linear material for a long period of time.
[0031]
FIG. 7 shows a third embodiment of the present invention.
In Fig. 7, 4 d are grooves, the grooves are formed in the inclined groove 4d of the triangular. According to the triangular inclined groove 4d, the lubricating effect of the triangular groove 4c is Ru is further enhanced.
[0032]
In the above-described embodiment, the case of a hemostasis valve for preventing leakage of blood from the catheter introducer has been described as an example. However, a cystoscope or the like for preventing urine outflow when a fiberscope or the like is inserted into the ureter. The present invention can also be applied to a valve for a medical instrument.
Further, in Example 2, four circles including the first and fourth disks having the square holes and the groove , the second disk having the small holes, and the third disk having the cutting layer formed thereon. Although the case where the valve bodies are laminated with the plate has been described, the number of the laminated discs may be increased or decreased at any time, and the shape is not necessarily limited to the disc.
[0033]
【The invention's effect】
The present invention relates to a plate-like medical instrument made of an elastic material that fluidly seals and slides a linear member inserted with a lubricant interposed in an insertion portion provided in the thickness direction near the center. In the valve for
On the valve surface of the valve, insert a plurality of square grooves or a plurality of triangular inclined grooves that are deeply inclined on the insertion portion side for storing lubricant into the plate surface so that a flat surface remains in portions other than these grooves. A valve for a medical instrument formed so as to extend radially toward the peripheral direction was configured.
Moreover, the valve for medical devices which provided the some square groove or the some triangular inclination groove | channel on the both plate | board surface of the valve | bulb was comprised.
[0034]
Furthermore, the present invention provides a plate-like material made of an elastic material that slides a linear member inserted in a liquid-tight manner through a insertion member provided in the thickness direction near the center with a lubricant interposed therebetween. In valves for medical devices,
With the insertion part as a polygonal hole, the hole side for storing lubricant from the hole toward the peripheral direction has a plurality of square grooves or a plurality of triangular inclined grooves that are deeply inclined. It consists of a first disk made of an elastic material that is more recessed and formed radially, a second disk made of an elastic material whose insertion part is a circular hole, and an elastic material whose cutting part intersects the insertion part. A third disk and a plurality of square grooves or a plurality of triangularly inclined grooves with a deeply inclined hole side for storing the lubricant in the peripheral direction from the hole as a polygonal hole in a plane other than these grooves. And a fourth disk made of an elastic material that is radially recessed so as to remain , and the first to fourth disks are sequentially stacked in layers to form a laminated shape. A valve was constructed.
[0035]
As a result, the stored lubricant is supplied to the gap between the insertion portion of the valve body and the inserted catheter along the plurality of square grooves or the plurality of triangular inclined grooves that are deeply inclined on the insertion portion side. Not only the friction is reduced, but the lubricant can be effectively used to keep the contact surface liquid-tight at all times. In addition, a plurality of square grooves or a plurality of triangular inclined grooves are formed so as to be recessed from the plate surface of the valve body so that a flat surface remains in a portion other than the grooves and to extend radially from the insertion portion toward the peripheral direction. Since the agent is stored in the plurality of square grooves or the plurality of triangular inclined grooves formed as described above, the lubrication of the insertion portion is maintained for a long time. Therefore, the restoring function of the elastic deformation of the valve body follows the sliding operation of the linear member quickly and smoothly. At the same time, since a plurality of square grooves or a plurality of triangular inclined grooves whose deep side of the insertion portion is inclined are formed on the plate surface of the valve body, the insertion portion is made thinner and the flexibility of the valve body is increased.
[0036]
Further, the valve body of the valve has a polygonal hole as an insertion portion, and a plurality of square grooves or a plurality of triangular inclined grooves which are deeply inclined on the hole side for storing lubricant from the hole toward the peripheral direction are portions other than these grooves. The first disk made of an elastic material that is recessed from the upper surface side so as to leave a flat surface and the second disk made of an elastic material having a circular hole as the insertion portion intersect the insertion portion. A third disc made of an elastic material as a cutting layer, and a plurality of square grooves or a plurality of triangular inclined grooves having a deeply inclined hole side for storing lubricant from the hole toward the peripheral direction with the insertion portion as a polygonal hole And a fourth disk made of an elastic material that is radially formed by recessing from the lower surface side so that a flat surface remains in a portion other than these grooves, and the first to fourth disks are sequentially stacked in layers. which is configured to form, molding of the valve is easily That and together with, the lubrication of the insertion portion is long-lasting. In addition, since the lubricant infiltrates into the gaps between the stacked valve bodies, the lubrication function is enhanced and the prevention of fluid leakage can be improved. As a result, the elastic follow-up function of the valve body accompanying the insertion of the linear material is maintained for a long period of time, and a valve for a medical instrument having a significantly long life can be realized.
[0037]
Therefore, according to the present invention, the function of preventing leakage of fluid such as blood can be maintained for a long period of time, and a long-life valve for a medical instrument can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective explanatory view in which a part of Embodiment 1 of the present invention is cut.
FIG. 2 is a plan view of Embodiment 1 of the present invention.
3 is a cross-sectional view taken along a line AA in FIG.
4 is a rear view of FIG. 2. FIG.
FIG. 5 is a cross-sectional view of an application example of the present invention.
FIG. 6 is an exploded perspective view showing a part of the configuration of the second embodiment of the present invention.
FIG. 7 is a plan view of Embodiment 3 of the present invention.
FIG. 8 is an exploded perspective view showing a configuration of a conventional valve.
FIG. 9 is an explanatory view showing a configuration of another conventional valve.
FIG. 10 is an explanatory view showing the configuration of another conventional valve.
[Explanation of symbols]
1 Valve 2 Valve body 2a. 2b Plate surface 3, 3 Square hole 4a Square groove 4d Triangular inclined groove 41 Corner 5 Small circular hole 6 Cutting layer 7 Catheter introducer 8 Main body 8a Passage 8b Flexible tube 8c Connection tube 9 Cap 10 Catheter 11 Lubricant 21 First Valve body 22 Second valve body 23 Third valve body 24 Fourth valve body 25 Oil groove 26 Oil hole OO Axle

Claims (3)

In a valve for a plate-like medical device made of an elastic material that seals and slides a linear member inserted through a lubricant inserted in an insertion portion provided in the thickness direction near the center. ,
The plate surface of the valve, prior Symbol recessed from the lubricant plurality of angular groove or a plurality of the plate surface so planes remains the triangular inclined groove portions other than the grooves of said insertion passage side is deep inclined for causing the storing A valve for a medical instrument, wherein the valve is formed so as to extend radially from the insertion portion toward the peripheral direction . Wherein the plurality of angular groove or valve for medical device of claim 1 Symbol mounting, characterized in that the plurality of triangular inclined grooves provided on both plate surfaces of the valve. In a valve for a plate-like medical device made of an elastic material that seals and slides a linear member inserted through a lubricant inserted in an insertion portion provided in the thickness direction near the center. ,
A plurality of square grooves or a plurality of triangular inclined grooves that deeply incline the hole side for storing the lubricant in the peripheral direction from the hole with the insertion portion as a polygonal hole so that a plane remains in a portion other than the grooves. A first disk made of an elastic material that is recessed from the upper surface side and formed radially ,
A second disk made of an elastic material having the insertion part as a circular hole;
A third disc made of an elastic material having a cutting layer that intersects the insertion portion;
A plurality of square grooves or a plurality of triangular inclined grooves that deeply incline the hole side for storing the lubricant from the hole toward the peripheral direction with the insertion portion as a polygonal hole so that a plane remains in a portion other than the grooves. And a fourth disk made of an elastic material that is recessed from the lower surface side and formed radially ,
A valve for a medical device, wherein the first disk to the fourth disk are sequentially stacked to form a laminated shape.

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