JP2003154013A - Catheter introducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a catheter introducer in which sheathed hubs and dilator hubs can be locked so as not to be removed and the burr of the distal end of the sheath can be avoided. SOLUTION: The catheter introducer (1) comprises the sheath (2) having the sheathed hubs (5), (45) at a rear side, and a dilator (3) having flanges (10), (30) and (30A) cut at an upper part at a front side or a flange (30B) formed on the entire periphery and the dilator hubs (9), (39). The introducer (1) further comprises arms (24), (34) formed at substantially intermediate abdominal parts of the outer peripheries of the dilator hubs (9), (39) via at least one or more coupling pieces (26), (36), locking pawls (24A), (34A) formed at the distal ends of the arms (24), (34), pressing parts (25), (35) formed on the rear end, and gripping parts (29), (39) mounted at the bottoms of the hubs (9), (39).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved catheter introducer including a sheath and a dilator, and more particularly to an improved connection structure for the sheath and the dilator.

[0002]

2. Description of the Related Art The following invention has already been disclosed as a connecting structure for a catheter introducer including a sheath and a dilator. D1; in the stylet of JP-A-1-146559,
The adapter 3 and the sheath connecting portion 30 and a pair of locking claws 4 facing each other with the sheath connecting portion 30 in between are integrally provided via a flexible connecting piece 31. A claw portion 40 that is bent toward the sheath connecting portion 30 side is provided at the distal end of the sheath 2 side in a facing state. The adapter 3 has a complicated part structure and the locking claws 40 are formed at two locations. When the locking claws 40 are at two locations, the number of parts is large and complicated, so that a defective molded product can be molded. Is concerned.

D2: Utility model registration No. 2545456 shows a dilator 109 and a sheath hub 10 in FIG. 14 (A).
FIG. 5B is a schematic view when the 5 is fitted, and FIG.
09) and the sheath hub 105 are separated from each other. A ring-shaped convex portion 110A formed along the inner peripheral portion of the flange 110 provided at the end portion of the dilator 109 so as to be attached to the end portion of the sheath hub 105, and along the outer peripheral portion of the sheath hub 105. The ring-shaped groove 110B formed is provided, and the ring-shaped protrusion 110 is formed by utilizing the elastic deformation of the flange 110.
It is characterized in that it can be easily attached and detached only by pressing without rotating A and the groove portion 110B relatively.
However, as shown in the schematic view (B), if the end portion of the dilator 109 opposite to the flange 110 is lightly pressed in the direction perpendicular to the axial direction, the engagement between the convex portion 110A and the groove portion 110B is easily disengaged. It may be pushed by the technician's hand during the procedure and come off. D3; Jpn. Pat. Appln. 4-46758 discloses an invention as shown in FIG. Opposing portions sandwiching the central axis of the spiral groove formed by the two spiral ridges are always located on a plane perpendicular to the central axis, and the dilator hub 109 and the sheath hub 105 are provided by the two small protrusions 117 screwed into the flat portion. Are coupled to each other without moving in the axial direction on the same central axis, and the dilator hub 109 is not left behind due to resistance from the tissue when inserted into the human body. Also,
When the dilator hub 109 is rotated in the direction opposite to that at the time of connection, the spiral ridge is separated from the small protrusion 117 and separated from the main body as it is, and the main body does not move at the moment of separation. However, it is necessary to turn the screw to attach / detach the dilator hub 109 and the sheath hub 105, and operation with both hands is indispensable, which makes the operation troublesome. In addition, when the sharp tip of the tube 111 of the dilator is in a normal state of pressing the inner wall of the blood vessel, the sharp tip may damage the inner wall of the blood vessel when the dilator is rotated.

Further, in D4: Japanese Patent Laid-Open No. 8-131552, a locking claw is formed on the inner base of the dilator, a fitting groove is formed on (the inner surface of) the sheath, and the locking claw and the fitting groove are engaged. The form to do is disclosed. D5; Japanese Patent Laid-Open No. 7-116261 discloses a sheath (hub) in which a convex portion or a groove portion is formed on an inner surface of a flange of a dilator.
There is disclosed a mode in which a groove portion or a convex portion is formed on (the outer surface), one of the flange and the sheath (hub) of the dilator is formed of hard and soft synthetic resin, and the convex portion is engaged with the groove portion. There is. In the above-mentioned known documents D2 to D5,
The sheath and the dilator are connected by a screw on the outer peripheral portion of the sheath hub and a screw on the inner surface of the dilator hub, or by fitting a concave portion on the outer peripheral portion of the sheath hub and a convex portion on the inner surface of the dilator hub. However, in the above method, the screws and the concave and convex are caught during the detachment, which takes time to attach and detach the sheath and the dilator, and the connection strength becomes too strong, which causes a problem that the sheath and the dilator are difficult to detach. . Further, in Documents D2 to D5, it is difficult to perform the fitting operation (attachment and removal) because the fitting state of the screw protrusion and the thread groove, and the fitting state of the convex portion and the groove portion cannot be visually confirmed from the outside. Therefore, the applicant of the present application is Japanese Patent Application No. 2001-272946.
In the above issue, the invention of means for preventing the attached sheath hub and dilator hub from being separated and suppressing the rotation around the central axis C is provided. However, when a strong force is momentarily applied to the means, In some cases, the force for suppressing the separation or the rotation is not always sufficient. Therefore, as a result of intensive studies to solve the above problems, the present inventors have arrived at the next invention.

[0005]

[1] According to the present invention, a sheath (2) having a sheath hub (5) (45) at the rear and a flange (10) (30) (30) having an upper portion cut forwardly.
A) or a dilator (3) having a flange (30B) formed over the entire circumference and dilator hubs (9) (39), wherein the dilator hub (9)
The arm portions (24) and (34) are provided on the outer circumference substantially in the abdomen of (39) via at least one or more connecting pieces (26) and (36).
Forming a locking claw (24A) (34A) at its tip, forming a pressing portion (25) (35) at its rear end, and a gripping portion at the bottom of the dilator hub (9) (39). (29)
A catheter introducer (1) equipped with (49) is provided. [2] The present invention relates to [1] when the pressing portions (25) and (35) are pushed downward, the connecting pieces (26) and (36) are used as fulcrums to interlock via the arm portions (24) and (34). Claw (24
A) (34A) is raised, and the sheath hub (5) (4
5) Body (17) (47) outer peripheral surface and flange (10)
(30) (30A) (30B) After mounting the inner peripheral surface, when the pressing of the pressing portions (25) (35) is released, the locking claws (24A) (34A) return to the original height. Alternatively, [1] 'the sheath hub (5) (45) is provided with a flange (10) (30) of the dilator hub (9) (39).
When the (30A) and (30B) are inserted, the locking claw (24
A) (34A) abuts the connection portions (12) (32), and further the flanges (10) (30) (30A) (30).
B) is pushed toward the sheath (2), and the locking claw (24
A) (34A) is pushed along the sheath (2) direction beyond the outer circumferences of the connection portions (12) and (32), [2]
After the [1] or [1] ', the locking claw (24A)
(34A) engages with the outer peripheral inclined portion (5A) or the vertical surface (46A) of the sheath hub (5) (45) so that the dilator hubs (9) (39) can be mounted without being separated from each other. The catheter introducer (1) according to claim 1, characterized in that. [3] According to the present invention, slopes (24D) (34D) are formed downward from the tips of the locking claws (24A) (34A), and the outer periphery of the connecting portions (12) (32) is covered with the sheath (2). )
There is provided the catheter introducer (1) according to the above [1] or [2], which is formed so as to be able to easily get over in a direction. [4] In the present invention, when the pressing of the pressing portion (25) is released after the sheath hub (5) is attached to the flange (10), the horizontal bottom of the arm portion (24) is connected to the connecting portion ( By pressing the outer peripheral top surface of the collar portion (16) of 12), rotation of the sheath hub (5) and the dilator hub (9) with respect to the central axis C can be suppressed. ] To [2], the catheter introducer (1) is provided. [5] The present invention is a means for preventing the installed sheath hub (5) and dilator-hub (9) from coming off and suppressing rotation about the central axis C of the sheath hub (5) and the dilator hub (9). , A locking part (24B) that engages with the inclined part (5A) is attached to the tip of the locking claw (24A), or the inclined part (engages with the tip of the locking claw (24A). 5A) is formed with a groove (5B), or an arm portion (2) that comes into contact with the upper outer periphery of the collar portion (16).
At the bottom of 4), there is a locking part (24) that engages with the flange part (16).
C) is mounted, or an uneven portion which engages with each other is formed at a position where the bottom portion of the arm portion (24) and the outer peripheral upper portion of the bottom portion and the flange portion (16) are in contact with each other. ] To [2], the catheter introducer (1) is provided. [6] The present invention provides the flanges (10), (30) and (30).
A) (30B) provides the catheter introducer (1) according to the above [1] to [5], which is formed at least 180 degrees around the central axis C of the dilator hub (9). [7] The present invention provides (A) the sheath hub (5) (45).
The protrusions (74) (84) or the protrusions (74a) (84a) on the bottom of the outer periphery of the flange (1).
0) (30) (30A) (30B) on the wall surface, the groove (73) (83) engaging with the protrusion (74) (84), or the groove engaging with the protrusion (74a) (84a) (7
3a) (83a) or (B) recesses (43a1) (43b1) in the outer circumference of the sheath hub (45).
Alternatively, the convex portions (43a) (43b) are formed, and the concave portions (43) are formed on the inner circumferences of the flanges (30) (30A) (30B).
a1) (43b1) or protrusions (43a) (43b) or recesses (43a) that engage with protrusions (43a) (43b)
1) A catheter introducer (1) according to the above [1] to [6], wherein (43b1) is formed. [8] In the present invention, a sheath (2) having a sheath hub (55) having a connecting member (59) formed of a hard or semi-rigid member on the rear side and a flange (50) formed of the hard or semi-rigid member on the front side. A catheter introducer (1) comprising a dilator (3) having a formed dilator hub (9), wherein the flange (50) of the dilator hub (9) has a plurality of fitting grooves (64) in the longitudinal direction. Or a plurality of fitting protrusions (53) are formed,
The connecting member (59) of the sheath hub (55) has a plurality of fitting protrusions (53) or a plurality of fitting grooves (6) on its side.
4) is formed, and the sheath (2) and the dilator (3) are detachably formed by fitting the fitting grooves (64) and the fitting protrusions (53). )I will provide a. [9] In the present invention, as the connecting member (59), a cap (5) is provided on a rear portion (55B) of the sheath hub (55).
2) is attached, the cap (52) is composed of a collar portion (56) and a body portion (57), and the collar portion (56) and the body portion (5)
The catheter introducer (1A) according to [7], wherein a plurality of fitting protrusions (53) or a plurality of fitting grooves (64) are formed over the side portion of 7). [10] In the present invention, the connecting member (59) is a rear portion (55B) of the sheath hub (55), and a plurality of fitting projections (53) are provided on a side portion of the rear portion (55B). The catheter introducer (1A) according to [7], wherein a plurality of fitting grooves (64) are formed. [11] In the present invention, a wide portion (53R) is formed in a front portion of the fitting protrusion (53), and a wide portion (64R) is formed in a rear portion of the fitting groove (64) [7]. To [9] to provide a catheter introducer (1A).

[0006]

1 is an exploded perspective view showing an embodiment of a catheter introducer 1 (hereinafter, introducer 1) of the present invention, FIG. 2 is a development view of a flange 10, and FIG. , (B) front view, (C) rear view,
(D) It is a top view. FIG. 3 shows the sheath hub 5 with the flange 1
FIG. 4 is a schematic view before engaging with the inner periphery of 0, and FIG. 4 is a schematic view after engaging. FIG. 5 is a schematic view showing an embodiment of the convex portion 74 (74a). The introducer 1 of the present invention is composed of a sheath 2 having a sheath hub 5 at the rear and a dilator 3 having a flange 10 whose upper part is horizontally cut at the front, and the flange 10 is made of a hard or semi-hard material. ing. To describe the introducer 1 of the present invention in more detail, the sheath hub 5 is made of a rigid or semi-rigid material, and is composed of a sheath 2 having the sheath hub 5 and a dilator 3 having a dilator hub 9, and the front side of the sheath hub 5. The tube 6 through the cover 4
, And a connecting portion 12 such as a cap is attached to the rear side. In addition, in FIG. 1, the connecting portion 12 is attached as a separate component as a part of the components of the sheath hub 5,
A component having the same shape as the connecting portion 12 can be integrally molded with the sheath hub 5. The connecting portion 12 is formed of a collar portion 16 and a body portion 17. At least two convex portions 74 may be formed on both sides of the outer periphery of the collar portion 16 at symmetrical positions, or instead of the convex portion 74, a convex portion 74a may be formed on the lower portion of the outer periphery of the collar portion 16. You may. The convex portion 74,
As for the shape of 74a, for example, as shown in FIG. 5, (A) can have a semicircular shape, (B) can have a substantially trapezoidal shape, and (C) can have a substantially triangular shape. At least the shapes of the convex portions 74 and 74a are
It suffices if the groove portions 73, 73a are formed so that they can be engaged more reliably when they are engaged with each other and that they can be easily disengaged when they are disengaged. The hemostatic valve 13 is arranged in the cavity of the body portion 17. A sheath side tube 7 is formed on the side portion of the sheath hub 5, and a sampling tube 8 is connected to this. In the dilator 3, the flange 10 having a diameter larger than that of the dilator hub 9 is formed in front of the dilator hub 9, and the tube 11 is connected to the inside thereof.

An arm portion 24, which is arranged horizontally or inclined, is formed on the top surface of the outer periphery of the dilator hub 9 through a connecting piece 26, and a locking claw 24A is formed at the tip thereof. An inclined surface 24D is formed on the locking claw 24A from the tip toward the lower side. A pressing portion 25 is formed at the rear end of the locking claw 24A, and a grip portion 29 is attached to the bottom portion of the dilator hub 9. A protrusion 27 for adjusting the pressing width of the pressing portion 25 is mounted below the pressing portion 25.
A plurality of non-slip grooves 23 are formed on the surfaces of the pressing portion 25 and the grip portion 29. A groove portion 73 that engages with the convex portion 74 is formed on the wall surface of the flange 10. Further, instead of the convex portion 74, when the convex portion 74a is formed, a groove portion 73a that engages with the convex portion 74a is formed. The shapes of the groove portions 73 and 73a may be formed so that they can be engaged more reliably when they are engaged with at least the shapes of the convex portions 74 and 74a and can be easily disengaged when they are disengaged. A notch 28 is formed on the bottom of the outer periphery of the flange 10, and the connecting portion 12 is formed on the inner periphery of the flange 10.
When the sheath hub 5 mounted with is attached, the notch 28 serves to assist the expansion of the flange 10. The cutout portion 28 may have any position and shape on the flange 10 as long as it fulfills the same role. When the pressing portion 25 is pressed, the connecting piece 26 bends due to elastic deformation, the locking claw 24A rises upward, and the locking claw 24A is designed to return to its original state when the pressing finger is released. ing. By horizontally cutting the upper part of the flange 10, the sheath hub 5 and the flange 10 are cut.
The locking force of can be increased.

An example of a method of mounting the sheath hub 5 and the flange 10 will be described. The sheath hub 5 and the flange 1
0 is arranged on the same central axis C, and the flange 10 is pushed in the direction of the sheath hub 5 along the central axis C. (1) The grip portion 29 is supported by a finger and the pressing portion 25 is pressed downward by the belly of the thumb. Connecting piece 26 due to elastic deformation
Becomes a fulcrum, the pressing force is transmitted to the arm portion 24, and the arm portion 24 and the locking claw 24A are raised upward. (2) The outer peripheral end surface of the body portion 17 of the connecting portion 12 is brought into contact with the inner peripheral end surface of the flange 10 to mount the connecting portion 12 on the flange 10. (3) When the pressing force that is pressed down on the pressing portion 25 is released, the locking claw 24A engages with the inclined portion 5A of the sheath hub 5 and the connecting portion 12 and the flange 10 are not separated from each other. Further, by cutting the upper part of the flange 10 horizontally, the horizontal bottom part of the arm part 24 presses the outer peripheral top surface of the flange part 16 and rotates about the central axis C of the sheath hub 5 and the dilator hub 9. Can be suppressed. Groove portion 73 and flange portion 16 formed on both sides of the flange 10.
By engaging the convex portions 74 formed on both sides of each other with each other, the rotation can be more reliably suppressed. Further, instead of the groove portion 73 and the convex portion 74, a convex portion 74a may be formed on the lower outer periphery of the flange portion 16 and a groove portion 73a that engages with the convex portion 74a may be formed. (4) In order to release the locked state of the connection part 12 and the flange 10 via the locking claw 24A, the pressing part 25 is pressed downward, the connecting piece 26 is bent, and the arm part 24 is bent.
The locking claw 24A moves upward through the. While pressing the pressing portion 25 downward, the flange 1 along the central axis C
Is separated from the sheath hub 5 in the opposite direction.

The sheath hub 5 and the flange 10 can be mounted as follows in addition to the mounting method described above. Although this mounting method can be applied to the locking claw 24A, in the case of locking portions 24B and 24C which will be described later, in this mounting method, the locking portion 24B is on the outer peripheral end surface of the body portion 17 and the locking portion. 24C cannot be applied because it is caught on the outer periphery of the collar portion 16. When the flange 10 is pushed toward the sheath hub 5, the slope 24D of the locking claw 24A first comes into contact with the body portion 17, and when a pressing force is further applied, elastic deformation of the connecting piece 26 causes the arm portion 2 to move.
4, the locking claw 24A is pushed beyond the outer circumference of the connecting portion 12 toward the sheath 2 direction, and by pushing further, the outer peripheral end surface of the body portion 17 and the inner peripheral end surface of the flange 10 are in contact with each other, and The pawl 24A engages with the inclined portion 5A of the sheath hub 5. By engaging the groove portions 73 formed on both sides of the flange 10 and the convex portions 74 formed on both sides of the flange portion 16 with each other, the rotation can be more reliably suppressed. Further, instead of the groove portion 73 and the convex portion 74,
A convex portion 74a may be formed on the lower portion of the outer periphery of the flange portion 16 and a groove portion 73a that engages with the convex portion 74a may be formed.

The following means can be mentioned as means for preventing the installed sheath hub 5 and flange 10 from being separated from each other and suppressing the rotation around the central axis C of the sheath hub 5 and the dilator hub 9. As shown in FIG. 3, the engaging portion 24B is attached to the tip of the engaging claw 24A.
As shown in FIG. 4, the locking portion 24B is locked to the inclined portion 5A to prevent the sheath hub 5 and the flange 10 from being separated and rotated. A concave groove 5B is formed in the curved inclined portion 5A as shown in FIG. 3, and the tip of the locking claw 24A and the groove 5B are engaged with each other as shown in FIG. Can be suppressed. As shown in FIG. 3, a locking portion 24C having a groove portion that engages with the outer peripheral top surface of the collar portion 16 is provided on the bottom portion of the arm portion 24, and the locking portion 24C is secured to the collar portion 16 as shown in FIG. By engaging with, the disengagement and rotation can be suppressed in the same manner as described above. An uneven portion (not shown) that engages with each other can be formed on the outer peripheral top surface of the collar portion 16 that abuts the bottom portion of the arm portion 24. For example, when a concave portion (or a convex portion) is formed on the bottom portion of the arm portion 24, the concave and convex portion forms a convex portion (or a concave portion) on the outer peripheral top surface of the collar portion 16 so that mutual concave and convex portions are locked. It is possible to suppress disengagement and rotation in the same manner as. Further, as shown in FIG. 3, by forming the groove portion 73 of the flange 10 and the convex portion 74 of the flange portion 16 and engaging them with each other, the rotation can be more reliably suppressed. Further, instead of the groove portion 73 and the convex portion 74, the convex portion 74a is formed, and the groove portion 73 engaging with the convex portion 74a is formed.
The shape of a may be formed and engaged.

The tip of the locking claw 24A and the locking portions 24B, 2
The inner peripheral surface of 4C can be covered with a material having a high frictional resistance (for example, an elastic body such as rubber or silicone) to further enhance the locking force and the suppression of rotation.

FIG. 6 is a schematic view of a dilator-hub 39 showing another embodiment of the dilator-hub 9, (a) is a front view of the dilator hub 39, and (b) is a side view. FIG. 7 is a schematic view of a sheath hub 45 showing another embodiment of the sheath hub 5, (a) is a side view of the sheath hub 45, and (b) is a rear view. FIG. 8 shows the convex portions 43a and 43B.
In the example, (a) is a sectional view and (b) is a plan view. Figure 9
Is an example of the recesses 43a1 and 43a2, (1a) is a sectional view, and (1b) is a plan view. The dilator hub 39 is different from the dilator hub 9 shown in FIG.
Is extended more downwardly than the arm portion 24, the locking force between the locking claw 34A and the vertical surface 46A of the collar portion 46 becomes stronger. Further, the locking claw 34A also forms a slope 34D downward from the tip, but when the locking claw 34A is operated by the mounting method described in the above paragraph [0008], the outer periphery of the connecting portion 32 is operated. Beyond the sheath 2
A slope 34D is formed in order to facilitate traveling along the direction. The slope 34D of the locking claw 34A and the locking claw 2
When comparing the slope 24D of 4A, the slope 34D is a gentler slope. This is because the angle between the outer periphery of the connecting portion 32 of the sheath hub 45 and the outer peripheral end face is 90 degrees, and therefore the gentle slope 34D is preferable because the locking claw 34A exceeds the outer periphery of the connecting portion 32. The inner periphery of the flange 30 is formed in a shape that engages with the connecting portion 32 of the sheath hub 45 described later as compared with the flange 10. More specifically, the groove 8 similar to the flange 10 is formed on the inner wall of the flange 30.
3 is formed, and a convex portion 84 similar to the collar portion 16 of the sheath hub 5 is formed on the outer periphery of the collar portion 46 of the sheath hub 45, which will be described later, and they are fitted to each other to form the sheath hub 45 and the dilator hub 3.
The rotation of the central axis C of 9 can be suppressed more reliably. Further, instead of the groove 83 and the convex portion 84, a convex portion 84a may be formed on the outer peripheral bottom portion of the collar portion 46, and a groove portion 83a that engages with the convex portion 84a may be formed. Similarly to the engagement of the portion 84, the rotation of the central axis C can be suppressed more reliably. In addition, the grooves 83, 83a and the convex portion 8
4 and 84a, instead of the flange 3 as shown in FIGS.
0, for example, the convex portions 43a and 43b and the collar portion 46 to the concave portion 43a.
The flange 30 and the collar portion 46 may be formed so that 1, 43b1 can be formed and locked with each other. A hemispherical (A) convex portion 43 is provided at the tip of the inner circumference of the flange 30.
a, 43b or substantially oval (1A) concave portions 43a1, 4a
3b1 are formed, and substantially elliptical (1B) concave portions 43a1 and 43b1 or hemispherical (A) convex portions 43a and 43b are formed on the outer circumference of the collar portion 46 of the sheath hub 45. The convex portions 43a and 43b or the concave portions 43a1 and 43b1 are similarly formed on the flanges 30A and 30B described later. The shape of the convex portions 43a and 43b is the same as that of the concave portion 43.
All shapes can be adopted as long as they can be locked with a1 and 43b1 and can be easily separated from each other when they are separated. The difference between the sheath hub 5 and the sheath hub 45 in FIG. 3 is that the sheath hub 5 forms the shape of the inclined portion 5A, whereas the sheath hub 45 has a vertical surface 46 on the flange portion 46.
A is formed and is formed so as to engage with the inner peripheral surface 34B of the locking claw 34A. Similar to the sheath hub 5, the sheath hub 45 connects the connecting portion 32 to the sheath hub 45.
Can be integrally molded with.

FIG. 10 is a schematic view of the sheath hub 45 and the dilator hub 39, (a) is a schematic view of the sheath hub 45 and the flange 30 of the dilator-hub 39 mounted, and (b) is the sheath hub 45. FIG. 6 is a schematic view of the flange 30 in the process of being removed, and (c) is a schematic view when the flange 30 is completely removed. The sheath hub 45 and the flange 30 can be mounted by substantially the same operation as the method of mounting the sheath hub 5 and the flange 10 in paragraphs [0008] (1) to (3). 000
It is preferable to mount it by the mounting method of [9]. Further, the detaching method is substantially the same as the detaching method of the sheath hub 5 and the flange 10 exemplified in (4) of the above-mentioned paragraph number [0008], and therefore detailed description thereof will be omitted. The locked state will be described based on the schematic diagram (a) when the sheath hub 45 and the flange 30 of the dilator-hub 39 are fitted. Locking claw 3
Since the inner peripheral surface 34B of 4A engages with the vertical surface 46A of the collar portion 46, the sheath hub 45 and the dilator hub 39 do not disengage from each other in the opposite directions with respect to the central axis C.

A flange whose upper portion is cut like the flange 10 will be described. FIG. 11 is a schematic view of a dilator-hub 39 mounted on the sheath hub 45, showing another embodiment of the flange 10 of the dilator hub 9. FIG.
9A and 9B are schematic views when forming 180 degrees around the central axis C of 9, wherein (1A) is a front view and (2A) is a side view.
(B) is a schematic view when it is formed at 250 degrees around the central axis C of the dilator hub 39 as in (A) above.
(1B) is a front view and (2B) is a side view. (C) is a schematic view when the flange 30B is formed at 360 degrees (a shape in which the upper cut portion is not formed), (1C) is a front view, and (2C) is a side view. Details will be described with reference to FIG. When a reference line L connecting the central axis C, the starting point O and the end point O ′ and the central axis C form an angle θ, a flange 30A is formed around the central axis C at the angle θ. The angle θ in this case is 180 degrees. In the same manner as (A) above, in (B), a flange 30 having an angle θ of 250 degrees is formed. Comparing the flanges 30, 30A, and 30B, the flange 30B has the largest contact area with the flange portion 46 and the connecting portion 32 of the sheath hub 45. Therefore, when the sheath hub 45 and the flange 30B are mounted, the flange 30B is The locking force is strongest in the direction perpendicular to the central axis C. However, in consideration of formability, the flange 30 formed with the angle θ of 250 degrees is preferable. If the flange 3
When the angle θ of the reference line L of 0, 30A, 30B is 180 degrees or less, the contact area between the inner periphery of the flanges 30, 30A, 30B and the inner periphery of the flange portion 46 and the connection portion 32 becomes small, The locking force becomes weaker in the direction perpendicular to the central axis C in proportion to the contact area. The flange 10 of FIG. 1 is
When it is formed at 360 degrees like the flange 30B (a shape in which the upper cut portion is not formed), the locking claw 24D does not engage with the slope 5A, and the bottom of the arm 24 serves as the outer peripheral top surface of the collar 16. Since it does not abut, the dilator 9 and the flange 5
Therefore, the flange 10 is formed at an angle of 180 degrees or more around the central axis C of the dilator hub 9 and at least the bottom portion of the arm portion 24 can contact the outer peripheral top surface of the collar portion 16. Preferably.

FIG. 12 is a schematic view (a partially enlarged view of the vicinity of the sheath hub 55 and the flange 50) showing another embodiment of the catheter introducer 1A of the present invention, and FIG. 13 is a perspective view of the connecting member 59 and the flange 50. FIG. 14 is a side view (A) and a front view (B) of the connecting member 59. The catheter introducer 1A has a connecting member 59 formed behind the sheath hub 55. In the present invention, the connection member 59 is, for example, the cap 52, and the rear portion 55 of the sheath hub 55.
A cap 52 is attached to B. The cap 52 is formed of a collar portion 56 and a body portion 57, and a plurality of fitting protrusion portions 53 are formed from the collar portion 56 to the side portion of the body portion 57.
A wide portion 5 having a curved portion R is provided in front of the fitting protrusion 53.
3R is formed. In addition, the protrusion 63 is provided inside the body 57.
Is formed, and this is fitted in a groove portion 67 formed on the outer periphery of the rear portion 55B of the sheath hub 55. In the cavity of the body 57 (between the rear end of the sheath hub 55 and the bottom of the body 57),
A hemostasis valve 13 is arranged. A sheath side tube 7 is formed on a side portion of the hub 55, and a sampling tube 8 is connected to the sheath side tube 7.

In the dilator 3, a flange 50 having a diameter larger than that of the hub 9 is formed in front of the hub 9, and a tube 11 is connected inside. The flange 50 has a plurality of fitting grooves 64 formed in the vertical direction. A curved portion R is provided behind the fitting groove 64.
The wide portion 64R having the is formed. When fitting the fitting protrusion 53 and the fitting groove 64 of FIGS. 12 to 14, the wide portion 53R of the fitting protrusion 53 is fitted by pushing the dilator 3 linearly in the sheath 2 direction. Ditch 6
While slightly pushing the entrance 64I of No. 4, the curved portions R are smoothly fitted into the wide portion 64R so that they can be fitted. On the other hand, in order to remove the fitting, the dilator 3 is linearly pulled in the opposite direction to the sheath 2 so that the wide portion 53R of the fitting projection 53 smoothly fits along the curved portion R of the wide portion 53R. Entrance 64I of the ditch 64
You can remove it by pushing it a little. In the present invention, both the connecting member 59 (cap 52) and the flange 50 are made of hard members or semi-hard members. It is preferable that each of them is made of a hard member, so that the mutual fitting operation and the fitting can be maintained well. Documents D2 and D5
As described above, if the flange 50 and / or the sheath hub (connecting member 59 (cap 52)) is formed of a soft member that is easily elastically deformed, the fitted state of the present invention cannot be maintained.

12 to 14, the connecting member 5 is shown.
The plurality of fitting projections 53 on the 9 (cap 52) side and the plurality of fitting grooves 64 on the flange 50 side are arranged in two places so as to face each other, but two or more places should be arranged. You can Further, the shapes of the fitting protrusion 53 and the fitting groove 64 are not limited to the shapes shown in FIGS. 12 to 14, and may be any shapes as long as they fit with each other. 12 to 14 show the connecting member 5
Although a plurality of fitting protrusions 53 are formed on the 9 (cap 52) side and a plurality of fitting grooves 64 are formed on the side, a plurality of fitting grooves 64 are formed on the connecting member 59 (cap 52) side. It is possible to form a plurality of fitting protrusions 53 on the flange 50 side. In this case, a plurality of fitting protrusions 53 are provided on the tip of the flange 50, and a plurality of fitting grooves 64 are formed on the side of the connecting member 59 (the body 57 of the cap 52).

12 to 14, the connecting member 5
The cap 52 is attached to the rear portion 55B of the sheath hub 55.
However, instead of the cap 52, a plurality of fitting protrusions 53 or a plurality of fitting grooves 64 can be formed directly on the rear portion 55B of the sheath hub 55 to form the connecting member 59. As described above, the plurality of fitting protrusions 53
And a plurality of fitting grooves 64 are formed on the cap 52 side and the connecting member 59 side so as to be arranged and fitted so as to face each other.
The directionality of the fitting is limited when the fitting is performed with 5, and the rotation of the dilator 3 can be suppressed when the fitting is performed. Further, since the fitting state can be visually observed from the outside throughout the fitting operation, the fitting operation (installation and removal) is easy. On the other hand, when detaching the flange 50 from the hub 55, the flange 50 is simply slid rearward, which facilitates the operation.

The sheath hubs 5, 45, 55 of the present invention,
Connection members 12, 32, 59 (cap 52), dilator hubs 9, 39, flanges 10, 30, 30A, 30
B and 50 are composed of a hard member or a semi-hard member and a soft member. As the hard member or the semi-hard member, a thermoplastic resin such as polyethylene, polypropylene, polystyrene, polycarbonate, ABS, methacrylic resin or acrylic resin is used. As the soft member, one softer than the hard member is used, and examples thereof include polyurethane, soft vinyl chloride, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ionomer, linear low-density polyethylene. , Ultra low density polyethylene or natural rubber having rubber elasticity, silicone rubber, butyl rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, acrylic rubber, ethylene-propylene rubber, or other synthetic rubber or styrene elastomer, Thermoplastic elastomers such as vinyl chloride elastomer, olefin elastomer, polyester elastomer, polyamide elastomer, urethane elastomer and the like are used.

[0020]

[Effects of the Invention] The sheath hubs 5, 45, 55 of the present invention
In the dilator hubs 9 and 39, (1) the arm portions 24 and 34 are formed on the outer peripheral approximately middle abdomen of the dilator hubs 9 and 39 via the connecting pieces 26 and 36, and the locking claws 24A and 34A are provided at the tips. By forming the pressing portions 25, 35 at the rear end, the tip of the locking claw 24A of the dilator hub 9, 39, the inner peripheral surface 39B of 34A, the sheath hub 5,
The slanted portion 5A of 45 and the vertical surface 46A of the collar portion 46 are engaged to form the sheath hubs 5 and 45 and the dilator hubs 9 and 39.
It can be locked so that it does not come off, and the curl of the sheath tip can be avoided. (2) The flanges 10, 30, 30A, 30B are formed at least 180 degrees around the central axis C, so that when the flanges are attached to the sheath hubs 5, 45, the flanges are sheath hubs 5, Since the contact area of 45 with the connecting portion 12, the collar portion 46 and the connecting portion 32 is large, the locking force becomes strong in the direction perpendicular to the central axis C in proportion to the contact area. (3) The sheath hubs 5, 45 and the dilator hub 9,
By means of 39 which does not separate and the rotation of the sheath hubs 5 and 45 and the dilator hubs 9 and 39 around the central axis C is prevented, curling of the tip of the tube 6 can be avoided, and the tube 11 of the dilator 3 can be prevented. The sharp tip is less likely to damage the inner wall of the blood vessel even in the normal state where the sharp tip is pressing against the inner wall of the blood vessel. (4) By forming the slopes 24D and 34D with the tips of the locking claws 24A and 34A facing downward, the dilator hubs 9 and 39 are pushed toward the sheath hubs 5 and 45, and the outer circumferences of the connection portions 12 and 32 are advanced. And the dilator hubs 9 and 39 and the sheath hubs 5 and 45 can be easily mounted. (5) After the sheath hub 5 is mounted on the flange 10, the horizontal bottom portion of the arm portion 24 presses against the outer peripheral top surface of the collar portion 16, so that the sheath hub 5 and the dilator hub 9 are aligned with respect to the central axis C. All rotation can be suppressed.
The rotation of the sheath hub 5 and the dilator hub 9 about the central axis C can be firmly suppressed. The arm part 2
Even if there is only one 4, the sheath hub 5 and the sheath hub 9 can be locked, and the number of constituent parts of the sheath hub 9 can be reduced, so that the production of defective molded products can be suppressed. (6) The flange 50 of the dilator 3 is attached to the hub 5 of the sheath 2.
The directionality in which the dilator 3 is attached to or removed from the connector 5 is limited, and the rotation of the dilator 3 can be suppressed during the fitting, so that the dilator 3 and the sheath 2 can be quickly and smoothly attached and detached. . Further, since the fitting state can be visually observed from the outside throughout the fitting operation, the fitting operation (installation and removal) is easy. (7) Groove portions 73 (73a), 83 (83a), 43a, 43b are formed on the wall surfaces of the flanges 10, 30, 30A, 30B, and the groove portions 73 (73a) are formed on the outer periphery of the collar portions 16, 46 of the sheath hubs 5, 45. ), 83 (83a), 43a, 4
Convex portions 74 (74a) and 84 (84a) 4 which engage with 3b
By forming 3a1 and 43b1, sheath hubs 5 and 4 are formed.
When the dilator hubs 9 and 39 are mounted on the gear 5, the dilator hubs 9 and 39 can be engaged more reliably and easily disengaged when disengaged, and the rotation about the central axis C can be reliably suppressed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an introducer of the present invention.

FIG. 2 is a development view of the flange 10, (A) is a side view,
(B) is a front view, (C) is a rear view, and (D) is a top view.

FIG. 3 is a schematic view before engaging the sheath hub 5 with the inner circumference of the flange 10.

FIG. 4 is a schematic view after the sheath hub 5 is engaged with the inner circumference of the flange 10.

FIG. 5 is a schematic view of an embodiment of convex portions 73 (73a) and 83 (83a), (A) is a semicircular shape, (B) is a substantially trapezoidal shape, and (C) is a substantially triangular shape.

FIG. 6 is a schematic view of a dilator-hub 39, (a) is a front view and (b) is a side view.

FIG. 7 is a schematic view of a sheath hub 45, (a) is a side view, and (b) is a rear view.

FIG. 8 is an example of convex portions 43a and 43B, where (A) is a hemispherical shape,
(B) is a substantially elliptical shape, (C) is a truncated pyramid shape, (a) is a sectional view, and (b) is a plan view.

9A and 9B show an example of recesses 43a1 and 43a2 in which (1A) is a hemispherical shape, (1B) is a substantially elliptical shape, (1C) is a quadrangular pyramid shape, and (1a) is a sectional view and (1b) is a plan view.

10A is a schematic view when the sheath hub 45 is engaged with the inner circumference of the flange 30, FIG. 10B is a schematic view when the sheath hub 45 is disengaged from the inner circumference of the flange 30, and FIG. Schematic when 45 is completely removed from the inner circumference of the flange 30.

FIG. 11 is a schematic view of the dilator-hub 39, (A) is a schematic view when the flange 30A is formed at 180 degrees around the central axis C of the dilator hub 39, and (1A) is a front view. 2A) is a side view (B) shows 25 around the central axis C of the dilator hub 39.
FIG. 1A is a schematic view when it is formed at 0 degrees, (1B) is a front view, (2B) is a side view, and (C) is a schematic when the flange 30B is formed at 360 degrees (a shape in which an upper cut portion is not formed). In the figure, (1C)
Front view (2C) is side view

FIG. 12: Catheter introducer 1A of the present invention
Schematic view showing another embodiment of (a partially enlarged view of the vicinity of the sheath hub 55 and the flange 50)

FIG. 13 is a perspective view of a connecting member 59 and a flange 50.

14 is a side view and a front view of the connecting member 59 of FIG.

15 (A) is a schematic view when the dilator-53 and the sheath hub 52 are fitted together, and FIG. 15 (B) is a schematic view when the dilator-53 and the sheath hub 52 are separated from each other.

FIG. 16 is a conventional schematic diagram.

[Explanation of symbols]

1, 1A Catheter Introducer (Introducer) 2 Sheath 3 Dilator 4 (Sheath) Cover 5, 45, 55, 105 Sheath Hub 5A (Sheath Hub) Inclined Section 5B Groove 6 (Sheath) Tube 7 (Sheath) Side Tube 8 Sampling Tube 9 , 39, 39A, 39B, 109 Dilator hub 10, 30, 30A, 30B, 50, 110 Flange 11, 111 (Dilator) tube 12, 32 (Sheath) connecting portion 13 Hemostasis valve 16, 46 Collar portion 17, 47 Body portion 23 grooves 24, 34 arm portions 24A, 34A locking claws 24B, 24C locking portions 24D, 34D slopes 25, 35 pressing portions 26, 36 connecting pieces 27 projections 28, 48 notches (slits) 29, 49 gripping portions 34B Inner peripheral surface (locking claw 34A) 43a, 43b Convex portion (recessed portion) 43a1, 4 b1 concave part (convex part) 46A vertical surface 52 (sheath) cap 55B rear part 56 collar part 57 body part 63 protrusion 59 connection member 53 fitting protrusions 53R, 64R wide part 64 fitting groove 64I inlet 67 groove parts 73, 73a , 83, 83a Grooves 74, 74a, 84, 84a Convex portion R Curved portion C Central axis O Start point O'End point L Reference line θ Angle 110A Convex portion 110B Concave portion 117 Small protrusion

Claims (11)

[Claims] 1. A sheath (2) having a sheath hub (5) (45) on the rear side and a flange (1) having an upper portion cut off on the front side.
0) (30) (30A) or flange (30B) formed over the entire circumference and dilator hub (9) (39)
And a dilator (3) having at least one connecting piece (26) (36) on the outer periphery of the dilator hub (9) (39) via at least one connecting piece (26) (36). 34), the locking claws (24A) (34A) are formed at the front end, and the pressing portion (2A) is formed at the rear end.
5) (35) to form the dilator hub (9)
A catheter introducer (1), characterized in that a grip (29) (49) is attached to the bottom of (39). 2. [1] When the pressing portions (25) (35) are pushed downward, the locking claws are provided via the arm portions (24) (34) with the connecting pieces (26) (36) as fulcrums. (24
A) (34A) is lifted up, and after attaching the outer peripheral surface of the body parts (17) (47) and the flanges (10) (30) (30A) (30B) of the sheath hub (5) (45), When the pressing of the pressing portions (25) (35) is released, the locking claws (24A) (34A) return to the original height, or [1] 'the sheath hub (5) (4).
5) When the flanges (10) (30) (30A) (30B) of the dilator hubs (9) (39) are inserted,
The locking claws (24A) (34A) are connected to the connection parts (12) (3).
2) abutting, and further the flange (10) (30)
Push (30A) and (30B) toward the sheath (2),
The locking claws (24A) (34A) have the connecting portions (12).
It is pushed along the direction of the sheath (2) beyond the outer periphery of (32), and [2] after the [1] or [1] ', the locking claws (24A) (34A) are moved to the sheath hub (5). (4
5. The dilater hubs (9) (39) are formed so as to be fitted to each other by engaging with the outer peripheral inclined portion (5A) or the vertical surface (46A) of 5) so that they cannot be detached from each other. The catheter introducer (1) according to 1. 3. An inclined surface (24D) (34D) is formed downward from the tip of the locking claws (24A) (34A), and the outer periphery of the connecting portions (12) (32) is directed to the sheath (2) direction. The catheter introducer (1) according to claim 1 or 2, wherein the catheter introducer (1) is formed so that it can be easily overcome. 4. The sheath hub (5) is attached to the flange (1).
0), the horizontal bottom part of the arm part (24) is connected to the connecting part (1) when the pressing part (25) is released.
By pressing the outer peripheral top surface of the collar portion (16) of 2), the sheath hub (5) and the dilator hub (9) can be prevented from rotating with respect to the central axis C. The catheter introducer (1) according to claim 1 or 2, wherein 5. A means for preventing the installed sheath hub (5) and dilator-hub (9) from coming off and suppressing rotation about the central axis C of the sheath hub (5) and the dilator hub (9). A locking part (24B) that engages with the inclined part (5A) is attached to the tip of the locking claw (24A), or the inclined part (5A) with which the tip of the locking claw (24A) engages. The groove (5B) is formed in the arm portion (2) which is in contact with the upper peripheral portion of the collar portion (16).
At the bottom of 4), there is a locking part (24) that engages with the flange part (16).
C) is attached, or an uneven portion which engages with each other is formed at a position where the bottom portion of the arm portion (24) and the outer peripheral upper portion of the bottom portion and the flange portion (16) are in contact with each other. The catheter introducer (1) according to claim 1 or 2, wherein 6. The flanges (10) (30) (30A)
(30B) is the central axis C of the dilator hub (9)
The catheter introducer (1) according to any one of claims 1 to 5, wherein the catheter introducer (1) is formed around at least 180 degrees. 7. (A) A convex portion (74) (84) or a convex portion (74a) (84a) is formed on the outer peripheral side surface of the sheath hub (5) (45) or on the outer peripheral bottom portion, and the flange (10) is formed.
(30) (30A) (30B) on the wall surface of the convex portion (7
4) Grooves (73) and (83) that engage with (84), or groove (73) that engages with the protrusions (74a) and (84a).
a) (83a) is formed, or (B) concave portions (43a1) (43b1) or convex portions (43a) (43b) are formed on the outer circumference of the sheath hub (45), and the flange (3) is formed.
0) (30A) (30B) on the inner periphery of the recess (43a
1) (43b1) or convex portions (43a) (43b) or concave portions (43a) engaging with the convex portions (43a) (43b)
1) (43b1) is formed, The catheter introducer (1) according to any one of claims 1 to 6, which is characterized in that. 8. A sheath (2) having a sheath hub (55) on which a connecting member (59) made of a hard or semi-rigid member is formed on the rear side, and a flange (50) made of a hard or semi-rigid member on the front side. A catheter introducer (1) comprising a dilator (3) having a dilator hub (9), wherein the flange (50) of the dilator hub (9) has a plurality of fitting grooves (64) or a plurality of fitting grooves (64) in the longitudinal direction. Mating protrusion (5
3) is formed, and the connecting member (59) of the sheath hub (55) has a plurality of fitting protrusions (53) or a plurality of fitting grooves (6) on its side.
4) is formed, and the plurality of fitting grooves (64) and the plurality of fitting protrusions (5) are formed.
The sheath (2) and the dilator (3) by the fitting by 3)
A catheter introducer (1A), wherein the catheter is detachably formed. 9. A cap (52) is attached to the rear portion (55B) of the sheath hub (55) as the connecting member (59), and the cap (52) has a collar portion (56) and a body portion (5).
7), and a plurality of fitting protrusions (53) or a plurality of fitting grooves (64) are formed over the sides of the flange (56) and the body (57). The catheter introducer (1A) according to claim 7. 10. The connecting member (59) is a rear portion (55B) of the sheath hub (55), the rear portion (5).
5B) has a plurality of fitting protrusions (53) or a plurality of fitting grooves (64) formed on a side portion thereof.
The catheter introducer (1A) according to 1. 11. A wide portion (53R) is formed in a front portion of the fitting protrusion (53), and a wide portion (64R) is formed in a rear portion of the fitting groove (64). The catheter introducer (1A) according to any one of claims 7 to 9.