JP2016209090A - Catheter hub, connection structure, and pressure proof inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a catheter hub, a connection structure, and a pressure proof inspection device capable of reducing the possibility of generating shavings or fragments due to abrasion in performing pressure proof inspection of a catheter, and performing connection while keeping airtightness with the catheter.SOLUTION: A pressure proof inspection device includes a catheter hub holding part for detachably holding a catheter hub, a connector connected to the catheter hub so as to receive its proximal side capable of injecting fluid into a lumen part of a catheter, and a connector holding part for closely connecting the connector and the catheter hub by holding the catheter hub to which the connector is connected, with the catheter hub holding part. An annular sealing face formed in a step part provided over the whole circumference of the outer periphery of the catheter hub, and a sealing face of the connector provided so as to correspond to the above sealing face are brought into contact with each other when holding the catheter hub to which the connector is connected by the catheter hub holding part and the connector holding part, thereby sealing the two sealing faces.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a catheter hub, a connection structure, and a pressure test apparatus.

  In recent years, in the treatment of myocardial infarction and cerebral infarction, apart from surgical treatment such as performing thoracotomy and brain opening and bypassing the blood vessel, minimally invasive treatment called intravascular treatment (IVR) using balloon catheter Sexual type treatment is actively performed. It may be applied not only to the heart and cerebral blood vessels but also to peripheral blood vessels such as hands and feet, and the number of cases is increasing year by year. As one of the treatment methods using the above-described balloon catheter, there is a method of physically expanding and treating a stenosis part according to the following flow. The method is as follows: (1) placing the balloon portion at the distal end of the catheter at the stenosis site, (2) injecting fluid into the balloon from the hub on the proximal side of the catheter, and pressurizing. It becomes.

  When performing the above treatment, an indeflator is connected to the catheter hub on the proximal side of the catheter and the balloon portion is pressurized to expand the balloon portion on the distal end side of the catheter. The applied pressure is on the order of MPa depending on the application. Regarding the shape of the connecting portion with the indeflator in the catheter hub described above, it is determined by the Pharmaceutical Affairs Law approval standards that it is a luer taper type female hub that can ensure airtightness with a simple insertion determined by ISO standards and the like. It has been.

  The tip end side of the indeflator is a corresponding tapered male hub so as to maintain airtightness with the tapered female hub described above. The connection state between the female hub as the catheter hub and the male hub on the distal end side of the indeflator has, for example, a connection structure as shown in FIG. The following is a brief description. As shown in FIG. 9, the indeflator 61 and the catheter 70 are connected via a male hub 62 and a female hub 71 as a catheter hub. The indeflator 61 includes a syringe part 64 having a pressure gauge 63, a connection tube 65 connected to the syringe part 64, and a male hub 62 connected to the connection tube 65. The male hub 62 is a luer lock type connector having a male tapered portion 66 and a female threaded portion 67 that are fitted to the female tapered portion 72 of the female hub 71. The female screw portion 67 is formed with a screw thread 68 as a female screw so as to face the male tapered portion 66. The flange 73 at the proximal end of the female hub 71 is engaged with the screw thread 68 so that both screws can be fixed. Then, by rotating the flange portion 73 along the screw thread 68, the taper surface of the female taper portion 72 of the female hub 71 and the taper surface of the male taper portion 66 of the male hub 62 are brought into close contact with each other. Contact. Further, the connection state between the female hub 71 and the male hub 62 is maintained by screw fixing. With such a configuration, the taper portions 66 and 72 of the female hub 71 of the catheter 70 and the male hub 62 of the indeflator 61 can be hermetically sealed by tightening the surfaces and can be kept airtight by screw fixing. Become.

  By the way, for example, when a balloon catheter is produced, a pressure resistance test is performed so that the balloon portion is not ruptured when the pressure is applied during the operation. At the time of this pressure test, generally, a luer lock type connector provided in the pressure tester is connected to the catheter hub to perform the test. At this time, the airtightness of the connection portion between the catheter hub and the connector is ensured by tightening the tapered surfaces of the catheter hub and the connector as in the case of using the indeflator during the above-described treatment.

  When processing a large amount with such a pressure tester, the taper surfaces are brought into close contact with each other, and screws are fixed. Waste or fragments may occur. As a result, they are more likely to enter the catheter. When the operation is performed with such scraps or fragments remaining in the catheter and the balloon portion bursts at some time during pressurization, they may enter the patient's body.

As other joining means to the catheter hub, (i) a locking mechanism using engagement as in the invention described in Patent Document 1, and (ii) means using an elastic material as in the invention described in Patent Document 2. Exists.
Patent Document 1 describes a lock mechanism for engaging a tip guard with a catheter hub. A concave portion is provided in the lumen portion of the catheter hub, a plurality of fingers are formed on the distal end guard so as to bend outward in the radial direction, and pawls extending outward in the radial direction are formed on the fingers. The tip guard is locked in the catheter hub, for example, by the finger pawls being received in the recesses of the catheter hub.
In Patent Document 2, an inner needle hub is housed in a housing member, and the holding member 12 and the inner needle hub 6 are placed in the housing member 8 by a holding member 12 made of an elastic material provided near the center of the inner needle hub. And forming a sealed decompression space formed by the inner surface of the storage member 8.
However, it is difficult for the means (i) described in Patent Document 1 to ensure airtightness that can withstand high pressure, and the means (ii) described in Patent Document 2 uses an elastic material, so that scraps or fragments are not formed. It can happen.

Japanese Patent Laid-Open No. 09-099073 Japanese Patent Laid-Open No. 10-201852

  In view of the above-mentioned problems, the object of the present invention is to reduce the possibility of causing scraps or fragments due to wear during pressure resistance inspection of the catheter, and to connect while maintaining airtightness with the catheter. It is an object of the present invention to provide a possible catheter hub, connection structure, and pressure test apparatus.

  As a result of intensive studies by the present inventors, a catheter hub having a predetermined step portion on which a predetermined sealing surface is formed, and a catheter to which a connector having a predetermined sealing surface corresponding to the sealing surface of the catheter hub is connected. It has been found that the above-mentioned problems can be solved by a pressure-resistant inspection device capable of sandwiching a hub between a catheter hub gripping portion and a connector gripping portion and sealing both, and has completed the present invention.

(1) A first aspect of the present invention is a catheter hub gripping part that detachably grips a catheter hub;
A connector connected to receive the proximal side of the catheter hub and injecting fluid into the lumen of the catheter;
A connector gripping part that tightly attaches the connector and the catheter hub by sandwiching the catheter hub to which the connector is connected with the catheter hub gripping part;
When the catheter hub to which the connector is connected is sandwiched between the catheter hub gripping part and the connector gripping part, an annular sealing surface formed on a step provided over the entire circumference of the catheter hub, and the sealing The present invention relates to a pressure-resistant inspection device in which both are sealed by contact with a sealing surface of a connector provided so as to correspond to a stop surface.
(2) In the present invention, the step portion of the catheter hub is formed by a saddle-shaped intermediate projection portion, and the catheter hub gripping portion is opposite to the sealing surface formed on the intermediate projection portion of the catheter hub. It is preferable to have a mechanism for supporting the intermediate protrusion at a position facing the surface.

(3) In the second aspect of the present invention, a catheter hub having a lumen that can communicate with the lumen of the catheter main body constituting the catheter and a connector having a lumen that can communicate with the lumen of the catheter hub are connected. In the connection structure for
The catheter hub has the lumen extending from the distal end opening to the proximal end opening, and the outer peripheral portion located between the distal end opening and the proximal end opening has a whole thereof. A step is formed over the circumference, and an annular sealing surface is formed on the step,
The connector has the lumen from a distal end opening to a proximal opening, the lumen being receivable from the distal end opening to the proximal side of the catheter hub; In the vicinity of the distal end opening, a sealing surface corresponding to the sealing surface of the catheter hub is formed so as to surround the distal end opening,
The present invention relates to a connection structure in which a sealing surface of a catheter hub and a sealing surface of a connector are brought into contact with each other by an external stress and are brought into close contact with each other while maintaining a seal between the two.
(4) In the present invention, it is preferable that an elastic material is provided on the sealing surface of the catheter hub and / or the sealing surface of the connector.

(5) A third aspect of the present invention is a catheter hub having a lumen that can communicate with a lumen of a catheter body constituting the catheter.
The lumen of the catheter hub is formed from the distal end opening to the proximal end opening of the catheter hub, and is an outer periphery located between the distal end opening and the proximal end opening. The step is formed with a stepped portion over the entire circumference, and the stepped portion relates to a catheter hub in which an annular sealing surface is formed.
(6) In this invention, it is preferable that the said step part of a catheter hub is formed with a hook-shaped intermediate protrusion part.
(7) In this invention, it is preferable that the said sealing surface is provided so that the said proximal end opening part side may be faced.
(8) In the present invention, it is preferable that an elastic material is provided on the sealing surface.
(9) In the present invention, in the vicinity of the proximal end opening, it is preferable that a male screw part and / or a taper is formed in the inner peripheral part in the outer peripheral part.

(10) A fourth aspect of the present invention is a connector connectable to the catheter hub according to any one of (5) to (9),
The connector has the lumen from a distal end opening to a proximal opening, the lumen being receivable from the distal end opening to the proximal side of the catheter hub;
A sealing surface corresponding to the sealing surface of the catheter hub is formed in the vicinity of the distal end opening so as to be able to contact the sealing surface of the catheter hub so as to surround the distal end opening. Concerning connectors.
(11) In this invention, it is preferable that the said lumen | bore can receive the part ranging from the proximal end opening part of the said catheter hub to the sealing surface formed in the step part.

  According to the present invention, it is possible to reduce the possibility of generating scraps or fragments due to wear during pressure resistance testing of a catheter, and to connect the catheter while maintaining airtightness.

It is a fragmentary perspective view which represents typically the proximal side of the catheter using 1st embodiment of the catheter hub which concerns on this invention. (A) It is the front view which showed typically 1st embodiment of the catheter hub which concerns on this invention. (B) It is a right view of Fig.2 (a). (A) It is the front view which showed typically 2nd embodiment of the catheter hub which concerns on this invention. (B) It is a right view of Fig.3 (a). (A) It is the front view which showed typically 3rd embodiment of the catheter hub which concerns on this invention. (B) It is a right view of Fig.4 (a). (A) It is the perspective view which showed typically 1st embodiment of the connector which concerns on this invention. (B) It is the perspective view which showed typically 2nd embodiment of the connector which concerns on this invention. It is the partial expanded sectional view which showed typically the state at the time of connecting 2nd embodiment of the catheter hub which concerns on this invention, and 2nd embodiment of a connector. It is the perspective view which showed typically the use condition of the pressure | voltage resistant test | inspection apparatus which concerns on this invention. It is the notch expanded sectional view which showed typically the installation state with respect to the pressure | voltage resistant test apparatus of one catheter in FIG. It is explanatory drawing which showed typically the connection state of a general catheter hub and an indeflator.

  Hereinafter, embodiments of a pressure resistance testing device, a connection structure, a catheter hub, and a connector according to the present invention will be described with reference to the drawings. For convenience, reference numerals may be omitted in the drawings, but in such a case, other drawings are referred to. Moreover, the dimension of the various members in drawing may be adjusted so that it may be easy to see for convenience.

A pressure-resistant test device according to the present invention includes a catheter hub gripping part that detachably grips the catheter hub, a connector that can be connected to receive the proximal side of the catheter hub and can inject fluid into the lumen of the catheter, The connector hub has a connector gripping portion that brings the connector and the catheter hub into close contact with each other by sandwiching the catheter hub to which the connector is connected with the catheter hub gripping portion. And, when the catheter hub to which the connector is connected is sandwiched between the catheter hub gripping portion and the connector gripping portion, an annular sealing surface formed on the stepped portion provided over the entire circumference of the catheter hub, It is configured such that both of them are sealed by contacting with a sealing surface of a connector provided so as to correspond to the sealing surface.
As described above, in the pressure test apparatus according to the present invention, the connector is connected to the catheter hub so as to receive the proximal side of the catheter hub, which is a constituent member of the catheter. When the catheter hub to which the connector is connected is sandwiched between the catheter hub gripping portion and the connector gripping portion, predetermined sealing surfaces of the connector and the catheter hub come into contact with each other so that both are sealed. That is, for example, the connector is connected to the catheter hub so as to cover a connecting portion with an indeflator provided on the proximal side of the catheter hub, and the sealing surface of the connector abuts against the sealing surface of the catheter hub. It is configured so as to be in contact with the above-mentioned state, and the airtightness of both is ensured. Therefore, it is not necessary to fix the screws while bringing the tapered surfaces into contact with each other, for example. As a result, it is possible to reduce the possibility of generating scraped scraps or pieces (hereinafter referred to as “scraps”) due to wear, and to connect the catheter while maintaining airtightness. In addition, since the contact position between the sealing surfaces of the two is separated from the connection portion with the inflator and the like on the proximal side of the catheter hub, even if debris or the like is generated, they are mixed in the catheter. The possibility can be reduced.

  The pressure resistance test apparatus according to the present invention is detachably connected to the catheter hub of the present invention having a specific structure bonded and fixed to the catheter via the connector having the predetermined structure described above so that the pressure resistance test of the catheter can be performed. Composed. First, an embodiment of the catheter hub and connector of the present invention will be described.

The catheter hub of the present invention has a lumen that can communicate with the lumen of the catheter body constituting the catheter. The lumen is formed from the distal end opening of the catheter hub to the proximal end opening. In addition, a stepped portion is formed on the outer peripheral portion located between the distal end opening portion and the proximal end opening portion, and an annular sealing surface is formed on the stepped portion. ing.
Thus, by having an annular sealing surface on the entire step of the outer periphery located between the openings at both ends of the lumen, as described above, the sealing surface of the connector of the pressure-resistant testing device By the contact, it can be connected to the pressure test apparatus of the present invention while ensuring airtightness. In addition, since the sealing surface is formed at such a position in the catheter hub, the proximal end side of the catheter hub is received in the lumen of the connector of the pressure-resistant testing device, and the connector hub is covered with the connector. Connection is possible. Therefore, it can be configured such that the sealing surface of the catheter hub and the sealing surface of the connector of the pressure-resistant testing device are in contact with each other at a portion different from the connection portion with the indeflator provided in the proximal end opening. As a result, at the time of connection with the pressure-resistant inspection device, unlike the conventional screw fixing or the like, it is possible to reduce the occurrence of debris and the like while ensuring airtightness. Moreover, the possibility that debris and the like are mixed in the catheter can be reduced. Furthermore, at the time of inspection, since the sealing surface of the catheter hub abuts on the sealing surface of the connector of the pressure-resistant inspection device, that is, it can be configured to contact the abutted state, for example, unlike the case of conventional screw fixing, The catheter hub can be easily installed in the pressure test apparatus. As a result, inspection efficiency can be improved. In addition, it is easy to increase the number of catheter hubs that can be installed in the pressure-resistant testing device and to implement the device, and it is possible to perform a large number of pressure-resistant tests at once, thereby further improving the inspection efficiency. .

  FIG. 1 is a partial perspective view schematically showing the proximal side of a catheter using the first embodiment of the catheter hub according to the present invention. Fig.2 (a) is a front view of 1st embodiment of a catheter hub, FIG.2 (b) is a right view of Fig.2 (a). The catheter 1 shown in FIGS. 1 and 2 has a catheter hub 10 and a catheter body 12. The catheter hub 10 has a distal end opening 18 at the distal end and a proximal end opening 19 at the proximal end, and extends from the distal end opening 18 to the proximal end opening 19. 16 is formed. In the present embodiment, a connection portion 14 for connecting an inflator, a syringe, and the like is provided on the proximal side of the catheter hub 10 and in the vicinity of the proximal end opening portion 19. While the male screw part 13 is provided, the wall surface (inner peripheral part) which forms the inner cavity part 16 in the connection part 14 has a female taper shape corresponding to the male taper shape of the tip portion of a syringe or the like. On the outer peripheral portion on the distal side of the connection portion 14 of the catheter hub 10, an operation portion 11 is formed for the operator or the like to hold and operate the catheter hub 10. A catheter body 12 is joined to the distal end of the catheter hub 10, and the lumen 17 of the catheter body 12 communicates with the lumen 16 of the catheter hub 10. A step portion 15 is provided on the outer periphery located between the distal end opening 18 and the proximal end opening 19 over the entire periphery. An annular sealing surface 15 a is formed on the step portion 15.

  If the position of the step portion 15 of the catheter hub 10 can receive the proximal side of the catheter hub 10 by a connector 50 of the pressure test apparatus 101 described later, the distal end opening 18 and the proximal end opening 19 are provided. Any of the outer peripheral parts may be used. It can be determined as appropriate according to the structure of the portion of the connector 50 that receives the proximal side of the catheter hub 10. In this example, the step portion 15 is provided so that the sealing surface 15a is positioned in the vicinity of the distal end of the connection portion 14 on the distal side.

  The structure of the stepped portion 15 is not particularly limited as long as it extends over the entire outer periphery of the catheter hub 10 and can form the annular sealing surface 15a. For example, (a) a saddle shape having two annular surfaces orthogonal to the central axis in the longitudinal direction of the catheter hub 10, and (b) one annular surface orthogonal to the central axis and an outer edge portion of the annular surface from the catheter hub (C) a shape having a stepped and / or tapered reduced portion that gradually and / or continuously decreases toward the distal side of the annular surface from the outer edge of the annular surface, (c) from the proximal side of the catheter hub 10 A stepped and / or tapered enlarged portion that expands stepwise and / or continuously toward the distal side, and a stepwise and / or continuous portion extending from the enlarged portion toward the distal side of the catheter hub 10 An intermediate protrusion such as a shape having a stepped and / or tapered reduced portion that is reduced in size. In FIGS. 1 and 2, the step portion 15 is formed by the hook-shaped intermediate projection portion (15) described above (a). An annular sealing surface 15a is formed on the annular surface on the proximal side of the bowl-shaped intermediate protrusion (15). Moreover, it is preferable that the peripheral edge part of the saddle-shaped intermediate projection part (15) is subjected to a process such as chamfering so that the operator does not have a risk of obstruction or injury during the operation. Further, as shown in FIG. 2B, in this example, the shape of the hook-shaped intermediate protrusion (15) is an annular shape in consideration of the shape of the connector 50 described later in the right side view. There is no particular limitation as long as airtightness can be maintained during inspection, and an elliptical ring shape, a polygonal ring shape, or the like may be used. In addition, the annular surface in the case of the intermediate projection having the shape having the annular surface and the reduced portion can also have the same shape. At this time, the reduced portion can be appropriately determined according to the shape of the annular surface.

  If the sealing surface 15a can contact | abut with the sealing surfaces 42 and 52 of the connectors 40 and 50 which are mentioned later, there will be no limitation in the structure. In the present embodiment, an annular plane orthogonal to the major axis direction of the catheter hub 10 is used. That is, the sealing surface 15a is provided so as to face the proximal end opening 19 side. In this case, the connectors 40 and 50 are moved along the long axis direction of the catheter hub 10 to ensure airtightness in a state where the sealing surface 15a is abutted against the sealing surfaces 42 and 52 of the connectors 40 and 50. This is preferable because it is easy.

  The surface state of the sealing surface 15a is not particularly limited, and may be appropriately determined according to the configuration in which the sealing surface 15a of the catheter hub 10 and the sealing surface of the connector are sealed. For example, the sealing surface 15a of the catheter hub 10 shown in FIGS. 1 and 2 is formed of a hard material, the sealing surface of the connector is also formed of the same level of hard material, and the two sealing surfaces are in contact with each other and are airtight. In order to ensure the property, the surface of the sealing surface is preferably a mirror-like smooth surface from the viewpoint of improving the adhesion at the contact portion between the sealing surfaces.

  Although the structure on the distal end opening 18 side of the saddle-shaped intermediate projection 15 as shown in FIGS. 1 and 2 is not particularly limited, the sealing surface of the connector is connected to the catheter from the proximal end opening 19 side during pressure resistance testing. From the viewpoint of resisting the pressing force when being brought into contact with the sealing surface 15 a of the hub 10, a round shape or a tapered shape is formed in the vicinity of the inner edge portion of the annular surface 15 b on the distal end opening 18 side of the intermediate protrusion 15. A thick portion may be formed (not shown). For the same reason, this thick portion may also be formed near the inner edge portion of the sealing surface 15a. Further, from the viewpoint of securing the strength against the pressing force, instead of the structure of the intermediate projection 15 having the annular surface 15b as shown in FIGS. A stepped shape that is gradually and / or continuously reduced from the outer edge of the sealing surface 15a toward the distal side of the catheter hub 10 from the outer edge of the sealing surface 15a, which is one annular surface orthogonal to the central axis, and A tapered reduced portion may be formed.

  With respect to the size of the intermediate protrusion 15 in the direction perpendicular to the central axis of the catheter hub 10, it is possible to form a sealing surface 15 a that can contact the sealing surface of the connector that receives the proximal side of the catheter hub 10. There is no particular limitation. In the embodiment shown in FIGS. 1 and 2, a connector (see, for example, FIG. 5) that receives the male screw portion 13 of the connection portion 14 formed on the proximal side of the catheter hub 10 and covers the entire connection portion 14 from the outside. It is sufficient if the size is such that it can contact and seal the sealing surface. Therefore, the size in the direction (radial direction) orthogonal to the central axis of the intermediate protrusion 15 in this embodiment may be larger than that of the screw portion 13. Also, from the viewpoint of making the size that does not hinder the operator's work when used as a catheter, it is preferable that the size be the same as or slightly larger than the sealing surface of the connector. .

In the present embodiment, as shown in FIG. 2B, the shape of the operation portion 11 is a flat shape in which the external shape is a rhombus shape in front view of the right side surface, and the same shape continues along the major axis direction of the catheter hub 10. However, the present invention is not limited to this. Considering the operator's workability, it is possible to adopt a shape that is easy to grip, such as another flat shape.
In addition, as shown in FIG. 1 or the like, the connection portion 14 has a male screw portion formed on the outer peripheral portion and a tapered shape formed on the inner peripheral portion. It is preferable to provide a taper shape on the inner periphery. As described above, in the case of a balloon catheter used for dilatation treatment, it is preferable to provide a tapered shape on the male screw portion and the inner peripheral portion of the outer peripheral portion from the viewpoint of airtightness and connectivity.

Next, a second embodiment of the catheter hub according to the present invention will be described with reference to FIG.
In the catheter hub according to the present invention, for example, as in the first embodiment, the annular sealing surface 15a formed on the step portion 15 may be a flat surface. From the viewpoint of better maintaining the contact state with the sealing surface, a locking portion complementary to the connector may be provided. By providing such a locking portion, it is preferable in that a failure such as a displacement of the sealing surfaces is less likely to occur due to an unexpected impact from a direction intersecting the longitudinal direction at the time of pressure resistance inspection. .
As such a locking part, for example, a concave part on the sealing surface of the catheter hub, a smooth concave surface of the sealing surface, a convex part, a smooth convex surface of the sealing surface However, the present invention is not limited to this. Further, the locking portion is not particularly limited as long as it can prevent connection displacement, and may be formed continuously in an annular shape along the annular sealing surface, or may be formed discontinuously at an arbitrary position. However, since it is effective when a locking portion having a structure complementary to the locking portion of the catheter hub is formed on the sealing surface of the connector, the locking portion is used from the viewpoint of easily contacting the connector. Are preferably uniform in shape along the annular surface direction of the sealing surface of the catheter hub and the sealing surface of the connector, and more preferably circular.

FIG. 3 is a partial explanatory view schematically showing a proximal side of a catheter using the second embodiment of the catheter hub according to the present invention, and FIG. 3 (a) is a front view thereof, FIG. FIG. 3B is a right side view of FIG. In the second embodiment shown in FIG. 3, a concave portion is provided as a locking portion on the sealing surface 15a formed in the step portion 15 of the first embodiment. Therefore, in FIG. 3, the same components as those in the first embodiment are denoted by the same reference numerals, and differences from the first embodiment will be described below.
The catheter hub 20 according to the second embodiment has a concave portion 26 provided on the sealing surface 15a of the step portion 15 of the catheter hub 10 of the first embodiment. That is, the catheter hub 20 according to the second embodiment has a saddle-shaped intermediate protrusion as a step portion 25 over the entire circumference on the outer circumference located between the distal end opening 18 and the proximal end opening 19. (25) is provided. The intermediate protrusion (25) has a bowl shape having two annular surfaces 25a and 25b orthogonal to the central axis of the catheter hub 20 in the long axis direction. The annular surface 25a functions as a sealing surface (25a). An annular recess 26 is formed in the sealing surface 25a. As shown in FIG. 3B, the recess 26 is circular in a side view. However, in the present invention, the recess 26 may be a continuous recess such as an ellipse or a polygon formed along the sealing surface, or a discontinuity such as a circle, an ellipse, or a polygon as a whole. A concave portion or other structure may be used.

  The cross-sectional shape of the recess 26 is shown by a V-shaped groove in FIG. 3, but may be a semicircular shape, an elliptical shape, a polygonal shape, or the like.

Next, a third embodiment of the catheter hub according to the present invention will be described with reference to FIG.
In the catheter hub according to the present invention, an elastic material may be provided on the sealing surface. Thereby, the adhesiveness when contacting with the sealing surface of the connector is improved, and the sealing is more easily maintained. Further, at the time of pressure resistance inspection, when the sealing surfaces of the catheter hub and the connector are brought into contact with each other and brought into close contact with each other, adhesion and sealability can be maintained with a smaller pressing force than when no elastic material is used. Therefore, when a step part is a saddle-shaped intermediate protrusion part as shown, for example in FIG. 4, possibility that an intermediate protrusion part will be damaged by pressing force can be reduced.

  The elastic material that can be used in the present invention is not particularly limited as long as it can improve the adhesion with the sealing surface of the connector and easily maintain the sealing performance of both, for example, urethane rubber, nitrile rubber, It may be a rubber material such as butyl rubber or silicone rubber, or may be a thermoplastic elastomer such as a polyamide elastomer.

4 is a partial explanatory view schematically showing the proximal side of a catheter using the third embodiment of the catheter hub according to the present invention, and FIG. 4 (a) is a front view thereof, FIG. FIG. 4B is a right side view of FIG. In the third embodiment shown in FIG. 4, an elastic material is provided on the sealing surface 15a formed in the step portion 15 of the first embodiment. Therefore, in FIG. 4, the same components as those in the first embodiment are denoted by the same reference numerals, and differences from the first embodiment will be described below.
The catheter hub 30 according to the third embodiment is obtained by providing an elastic material 36 on the sealing surface 15a of the step portion 15 of the catheter hub 10 of the first embodiment. That is, the catheter hub 30 according to the third embodiment has a saddle-shaped intermediate projection as a step 35 extending over the entire circumference of the outer circumference located between the distal end opening 18 and the proximal end opening 19. (35) is provided. The intermediate protrusion (35) has a bowl shape having two annular surfaces 35a and 35b orthogonal to the central axis of the catheter hub 30 in the long axis direction. The annular surface 35a is a smooth flat surface and functions as a sealing surface (35a). An annular elastic member 36 is provided on the sealing surface 35a.

In the example illustrated in FIG. 4, the elastic material 36 is disposed so as to cover substantially the entire sealing surface 35 a of the intermediate protrusion 35 in the example illustrated in FIG. 4. However, although not shown in the drawings, from the viewpoint of improving the adhesion when contacting the sealing surface of the connector and maintaining the sealing, an elastic material is formed over the entire circumference of the annular portion of the portion where the sealing surface of the connector contacts. Therefore, the sealing surface 35a of the catheter hub 30 may have a ring shape corresponding to the sealing surface of the connector. Examples of such an annular shape include a circular shape in a side view of the concave portion 26 as the locking portion shown in FIG. 3B, but are not limited to this, and may be an elliptical shape, a polygonal shape, or the like. May be. Further, the surface of the elastic material 36 on the side in contact with the catheter hub may be a smooth flat surface, or may be formed with one convex portion that is continuous in an annular shape, or two or more such convex portions. It may be formed concentrically. Examples of the cross-sectional shape of the protrusion include a semicircular shape, a semi-elliptical shape, and a polygonal shape, but are not particularly limited.
Moreover, although not shown in figure, you may arrange | position the elastic material 36 along the recessed part 26 as a latching | locking part in 2nd embodiment.

Next, an embodiment of a connector according to the present invention will be described with reference to FIG.
The connector according to the present invention can be connected to the catheter hub according to the present invention as described above. And it has the said lumen from a distal end opening part to a proximal side opening part. The lumen can receive the proximal side of the catheter hub from the distal end opening. In addition, a sealing surface corresponding to the sealing surface of the catheter hub is formed in the vicinity of the distal end opening of the connector so as to be able to contact the sealing surface of the catheter hub so as to surround the distal end opening. Has been. Thus, since it has the lumen | bore which can receive the proximal side of a catheter hub from a distal end opening part, it can connect with a catheter hub so that the proximal side of a catheter hub may be covered. That is, it may be configured to contact and seal the sealing surface of the catheter hub at a portion different from a connection portion with an indeflator or the like provided at the proximal end opening of the catheter hub. Therefore, unlike conventional screw fixing, it is possible to reduce the occurrence of debris and the like while ensuring airtightness. Moreover, since the sealing surface of the connector can be configured to come into contact with the sealing surface of the catheter hub, for example, unlike the case of conventional screw fixing, the connection with the catheter hub can be easily performed. As a result, inspection efficiency can be improved. In addition, it is easy to increase the number of catheter hubs that can be installed in the pressure-resistant testing device and to implement the device, and it is possible to perform a large number of pressure-resistant tests at once, thereby further improving the inspection efficiency. .

  FIG. 5 is a perspective view schematically showing an embodiment of the connector according to the present invention. FIG. 5 (a) shows the first embodiment, and FIG. 5 (b) shows the second embodiment. is there.

  The connector 40 according to the first embodiment shown in FIG. 5A includes a housing portion 41 that can receive the proximal side of the catheter hub, and a connecting portion 46 that can be detachably connected to the pressure-resistant testing device. The connector 40 has a distal end opening 43 and a proximal end opening 44, and has a lumen 45 extending from the distal end opening 43 to the proximal opening 44. The lumen 45 includes a lumen 45 a formed in the housing portion 41 and a lumen 45 b formed in the connecting portion 46. At the distal end of the housing portion 41, a sealing surface 42 that can contact the sealing surface of the catheter hub so as to surround the distal end opening 43 and that corresponds to the sealing surface of the catheter hub is formed. .

The shape and size of the lumen 45 formed in the housing part 41 are not particularly limited as long as the shape and size can receive the proximal side of the catheter hub described above. In the present embodiment, the housing portion 41 has a cylindrical shape whose diameter is constant along the major axis direction, and the inner diameter thereof is larger than the maximum width on the proximal side of the catheter hub (see, for example, FIGS. 6 and 8). The length in the long axis direction of the lumen 45a is not less than the length in the long axis direction on the proximal side from the sealing surface of the catheter hub, and is preferably longer than that length.
The sealing surface 42 should just have the shape corresponding to the sealing surface of the catheter hub mentioned above. In the present embodiment, the sealing surface 42 has a shape corresponding to the sealing surface 15a as shown in FIG. 1, for example. Therefore, the sealing surface 42 is an annular smooth flat surface formed so as to surround the distal end opening 43 on a plane orthogonal to the longitudinal central axis of the connector 40.
The structure of the connecting portion 46 can be changed as appropriate according to the connection structure with the pressure-resistant inspection device. In the present embodiment, the cylindrical shape is smaller in diameter than the housing 51, but the present invention is not limited to this.

The connector 50 according to the second embodiment shown in FIG. 5B is obtained by providing a locking portion or an elastic material on the sealing surface 42 of the connector 40 according to the first embodiment. Therefore, in FIG. 5B, the same components as those in the first embodiment are denoted by the same reference numerals, and differences from the first embodiment will be described below.
The connector 50 which concerns on 2nd embodiment provides the latching | locking part or the elastic material in the sealing surface 42 of the connector 40 of 1st embodiment. A sealing surface 52 corresponding to the sealing surface of the catheter hub is formed at the distal end of the housing portion 41 of the connector 50 so as to be able to contact the sealing surface of the catheter hub so as to surround the distal end opening 43. Has been. The sealing surface 52 is provided with a locking portion or an elastic material 53. The shape of the locking portion or the elastic material 53 is not particularly limited as long as it has an annular structure that continues along the sealing surface 52. However, it is preferable to have a complementary structure corresponding to the sealing surface of the catheter hub in order to seal the sealing surface by abutment. Therefore, when the latching | locking part 53 is provided, it is preferable that it is a shape corresponding to the latching | locking part formed in the sealing surface of a catheter hub. In particular, when both are hard materials, both locking portions need to have corresponding shapes. For example, in the case of the locking portion 53 having the structure shown in FIG. 5B, the cross-sectional shape of the locking portion 26 of the catheter hub shown in FIG. 3 corresponds to the cross-sectional shape (semicircular shape) shown in FIG. This is suitable for a catheter hub having a locking portion (concave portion) having a cross-sectional shape. On the other hand, when the elastic material 53 is provided, it is not always necessary to correspond to the cross-sectional shape. For example, as shown in FIG. 6, an elastic material 53 having a semicircular cross section may be fitted into the concave portion 26 having a V shape cross section so as to be pressed.
As described above, the locking portion has a significance of making it difficult to cause a failure such as a connection gap between the sealing surfaces against an unexpected impact, and the elastic material is used when the sealing surfaces are in contact with each other. It has the significance of improving adhesion and making sealing easier. Therefore, it is good to provide the latching | locking part or elastic material corresponding to the structure of the sealing surface of a catheter hub according to these meanings. In the case of the combination of the catheter hub and the sealing surface of the connector shown in FIG. 6, the elastic material 53 of the connector 50 also has significance as a locking portion.

  The structure of the locking portion 53 may be a complementary structure corresponding to the locking portion of the catheter hub described above. The structure of the elastic material 53 is not particularly limited as long as the elastic material 53 comes into contact with and closely adheres to the sealing surface of the catheter hub, and both are sealed, and may be an annular shape that is continuous along the sealing surface 52 of the connector 50. For example, a circular shape, an elliptical shape, a polygonal shape, and the like can be given, but the invention is not limited to these. There may be one such annular convex portion, or two or more may be formed concentrically. Also, the cross-sectional shape is not particularly limited, and examples thereof include a semicircular shape, a semi-elliptical shape, and a polygonal shape, but are not particularly limited. As the elastic material, the same material as that of the catheter hub can be adopted.

Next, an embodiment of a connection structure between a catheter hub and a connector according to the present invention will be described with reference to FIGS.
A connection structure according to the present invention is for connecting a catheter hub having a lumen that can communicate with the lumen of a catheter body constituting the catheter and a connector having a lumen that can communicate with the lumen of the catheter hub. Is.
Here, the catheter hub has a lumen extending from the distal end opening to the proximal end opening. At the outer periphery located between the distal end opening and the proximal end opening, a step is formed over the entire periphery, and an annular sealing surface is formed at the step. Yes.
The connector also has a lumen extending from the distal end opening to the proximal opening. The lumen can receive the proximal side of the catheter hub from its distal end opening, and in the vicinity of the distal end opening, the sealing of the catheter hub so as to surround the distal end opening. A sealing surface corresponding to the surface is formed.
Then, the sealing surface of the catheter hub and the sealing surface of the connector are brought into contact with each other by an external stress and are brought into close contact with each other, so that the both are connected while maintaining the sealing therebetween.

  Thus, in the connection structure according to the present invention, the connector is connected to the catheter hub so as to receive the proximal side of the catheter hub that is a component of the catheter. And the sealing surface of a catheter hub and the sealing surface of a connector are contact | abutted by external stress, and the sealing of both is hold | maintained by making it closely_contact | adhere. The connector is connected to the catheter hub so as to cover, for example, a connection portion with an indeflator provided on the proximal side of the catheter hub, and the sealing surface of the connector is in contact with the sealing surface of the catheter hub It is comprised so that it may touch, and the airtightness of both is ensured. Therefore, it is not necessary to fix the screws while bringing the tapered surfaces into contact with each other, for example. As a result, it is possible to reduce the possibility of causing debris or the like and to connect the catheter while maintaining airtightness. In addition, since the contact position between the sealing surfaces of the two is separated from the connection portion with the inflator and the like on the proximal side of the catheter hub, even if debris or the like is generated, they are mixed in the catheter. The possibility can be reduced.

  6 is a partially enlarged view schematically showing a state when the catheter hub 20 according to the second embodiment shown in FIG. 3 and the connector 50 according to the second embodiment shown in FIG. 5B are connected. is there. FIG. 8 is a schematic view showing an embodiment of the connection structure 4 between the catheter hub 10 according to the first embodiment shown in FIGS. 1 and 2 and the connector 40 according to the first embodiment shown in FIG. FIG.

As shown in FIGS. 6 and 8, the catheter hubs 20, 10 and the connectors 50, 40 are arranged such that the proximal connection part 14 of the catheter hubs 20, 10 is covered by the housing part 41 of the connectors 50, 40. Connected. At this time, the sealing surfaces 25a and 15a of the hook-shaped intermediate protrusions (25 and 15) which are the step portions 25 and 15 of the catheter hubs 20 and 10 come into contact with the sealing surfaces 52 and 42 of the connectors 50 and 40, respectively. .
At this time, in the embodiment shown in FIG. 6, the recess 26 as the locking portion formed on the sealing surface 25 a of the catheter hub 20 is formed by the elastic member 53 formed on the sealing surface 52 of the connector 50. The convex part (53) as a latching part fits. At this time, the sealing surfaces 25a and 52 other than the concave portion 26 and the convex portion (53) can also come into contact with each other.
In the embodiment shown in FIG. 8, the smooth flat surface of the sealing surface 15 a of the intermediate protrusion 15 of the catheter hub 10 and the smooth flat surface of the sealing surface 42 of the connector 40 abut.
Then, external stress is applied so that the sealing surfaces 52 and 42 of the connectors 50 and 40 and the sealing surfaces 25a and 15a of the catheter hubs 20 and 10 are brought into contact with each other. That is, in the embodiment shown in FIGS. 6 and 8, the distal end side of the catheter hub 20, 10 and the connectors 50, 40 are arranged in a direction parallel to the longitudinal central axis of the catheter hub 20, 10 and the connectors 50, 40. External stress is applied from the proximal side so as to sandwich both of them. The load direction is a direction orthogonal to the contact surfaces 25a and 15a of the connector hubs 20 and 10 and the sealing surfaces 52 and 42 of the connectors 50 and 40. Accordingly, in the embodiment shown in FIG. 6, the elastic material 53 of the connector 50 is fitted so as to be pressed against the concave portion 26 of the catheter hub 20, and the elastic member 53 and the concave portion 26 are brought into close contact with each other, thereby improving the sealing performance. At the same time, the two are connected so that a failure such as a connection shift between the sealing surfaces is less likely to occur due to an unexpected impact. In the embodiment shown in FIG. 8, both are connected such that the sealing surface 15 a of the connector hub 10 and the sealing surface 42 of the connector 40 are tightly sealed. The method of applying external stress at this time is not particularly limited as long as the sealing surfaces of the two come into contact with each other and can be brought into close contact with each other.

Next, an embodiment of a pressure test apparatus according to the present invention will be described with reference to FIGS.
FIG. 7 is a perspective view schematically showing a usage state of the embodiment of the pressure resistance testing apparatus according to the present invention. FIG. 8 is a cutaway enlarged cross-sectional view schematically showing the installation state of the catheter hub in the catheter installed in the pressure test apparatus shown in FIG.
7 and 8, the catheter hub 10 of the catheter 1 is installed in the pressure test apparatus 101 having the connector 40 shown in FIG. 5 (a), taking as an example the case of performing the pressure test of the catheter 1 shown in FIGS. Although the state is shown, it is applicable to the pressure resistance test of the catheter having various catheter hubs as described above. The same applies to a pressure-resistant inspection apparatus having various connectors as described above.

  The pressure resistance test apparatus 101 illustrated in FIG. 7 includes catheter gripping portions 106 and 107, a connector 40, and a connector gripping portion 104. The catheter gripping portions 106 and 107 are provided on the upper surface of the gantry 105. The connector 40 is detachably installed on the connector grip 104. The connector grip 104 adjusts the distance between the connector 40 and the catheter grips 106 and 107 so that the sealing surface of the catheter hub and the sealing surface 42 of the connector 40 can be brought into close contact with each other. 40 is configured to be movable relative to the gantry 105. In addition, a fluid injection device 102 for injecting fluid into the lumens 16 and 17 of the catheter 1 is connected to the connector grip 104 via a pipe 103. A fluid flow path communicating with the inner cavity 45 of the connector 40 is formed inside the connector grip 104 (not shown). The fluid for inspection is not particularly limited, but gas is preferable from the viewpoint of simplicity of inspection.

As shown in FIGS. 7 and 8, the catheter hub gripping portions 106 and 107 are configured to detachably hold the catheter hub 10 of the catheter 1. The catheter hub grip 106 includes two sets of supports 106 a and 106 b protruding from the upper surface of the gantry 105 in the vicinity of the distal end of the catheter hub 10, and the side surface of the distal portion of the catheter hub 10. Is to be inserted. Further, the wall surfaces of the supports 106a and 106b on the side facing the catheter hub 10 have a shape corresponding to the shape of the corresponding outer peripheral portion of the catheter hub 10 in plan view from the upper surface side of the gantry 105 (FIG. 8). Thereby, it becomes easy to grasp the catheter hub 10 stably. Further, when the catheter gripping portion 104 is moved relative to the gantry 105 in parallel with the central axis in the longitudinal direction of the catheter hub 10, the pressing force is applied when the sealing surfaces of the catheter hub 10 and the connector 40 are brought into contact with each other. In order to accept, in this embodiment, the distance between the wall surfaces of the supports 106a and 106b on the side facing the catheter hub 10 is reduced along the load direction of the pressing force. Other structures that exhibit the same function may be used.
In the present invention, from the viewpoint of more effectively receiving such a pressing force, the catheter hub gripping portion is intermediate at a position facing the surface opposite to the sealing surface formed on the intermediate projection of the catheter hub. It is preferable to have a mechanism for supporting the protrusion. As such a mechanism, in this embodiment, a catheter gripping portion 107 is further provided on the side of the annular surface 15b facing the distal side of the catheter hub 10 in the saddle-shaped intermediate projection portion 15 of the catheter hub 10. . Similarly to the other catheter gripping portions 106 described above, the catheter gripping portion 107 also includes two sets of supports 107a and 107b protruding from the upper surface of the gantry 105, and the annular surface b of the intermediate projection portion 15 of the catheter hub 10 is provided. The side surface of the distal portion of the device is sandwiched. In the present embodiment, the supports 107a and 107b are prismatic, but from the viewpoint of supporting the pressing force by the annular sealing surface 42 of the connector 10 on the entire annular surface 15b from the annular surface 15b side, A splittable annular structure corresponding to the annular surface 15b may be used in consideration of detachability. These supports may be installed in a state where they cannot move in the state shown in FIG. 7 or may be movable. Further, in this embodiment, the case where the step portion 15 of the catheter hub 10 is a saddle-shaped intermediate projection portion 15 is taken as an example. However, in other cases, a support body having a shape capable of performing the same function is used. Of course, it can be provided.

  In the pressure resistance test apparatus 101 shown in FIG. 7, six catheters are installed so that pressure resistance tests of one to six catheters can be performed at one time. It may be a structure where two or more can be installed.

The usage method of the pressure | voltage resistant test | inspection apparatus 101 is demonstrated below.
Relative movement of the connector 40 relative to the gantry 105 so that the connector gripping portion 104 of the pressure-resistant testing device 101 can insert the connecting portion 14 of the catheter hub 10 of the catheter 1 into the lumen 45a of the housing portion 41 of the connector 40. Or the connector 40 is removed from the connector grip 104. Thereafter, the vicinity of the distal end of the catheter hub 10 is fitted between the two sets of supports 106 a and 106 b of the catheter hub gripping portion 106. At the same time, the distal side of the annular surface 15 b of the intermediate projection 15 of the catheter hub 10 is fitted between the two sets of supports 107 a and 107 b of the catheter hub 107. At this time, the connector 40 is connected to the connector gripping portion 104 while the connection portion 14 of the catheter hub 107 is inserted into the lumen 45 a of the connector 40.
Then, by adjusting the distance between the connector 40 and the catheter gripping portions 106 and 107 by the connector gripping portion 40, the catheter hub 10 to which the connector 40 is connected becomes the catheter hub gripping portions 106 and 107 and the connector gripping portion 104. The external stress is applied so that the sealing surface 14 of the catheter hub 10 and the sealing surface 42 of the connector 40 are in contact with each other, and the catheter hub 10 and the connector 40 are sealed. While maintaining this state, fluid is injected from the fluid injection device 102 through the pipe 103, and the lumen of the catheter 1 is pressurized to a desired pressure. At this time, if the pressure does not reach a predetermined value, the sealing performance may be low, so the pressure resistance test is rejected, and if the pressure is reached, the pressure resistance test is passed.
After completion of the test, the distance between the connector 40 and the catheter gripping portions 106 and 107 is adjusted by the connector gripping portion 40, and the catheter hub 10 (catheter 1) is removed.

  As described above, according to the present invention, the connector and the catheter hub can be connected so as to cover the connecting portion of the catheter hub, and both can be sealed simply by bringing the sealing surfaces into contact with each other. is there. Therefore, it is possible to reduce the possibility of causing debris or the like during the pressure resistance test of the catheter and the possibility of mixing into the catheter lumen. Since the catheter can be easily attached to and detached from the pressure-resistant inspection device, the inspection efficiency can be improved.

1, 2, 3 Catheter 4 connection structure 10, 20, 30 Catheter hub 11 Operation part 12 Catheter body 13 Male thread part 14 Connection part 15, 25, 35 Intermediate projection part 15a, 25a, 35a Sealing surface 15b, 25b, 35b Annular Surface 16, 17 Lumen 18 Distal end opening 19 Proximal end opening 26 Locking portion (concave portion)
36 Elastic material 40, 50 Connector 41 Housing portion 42, 52 Sealing surface 43 Distal end opening 44 Proximal opening 45, 45a, 45b Lumen 46 Connection portion 53 Locking portion / elastic material 101 Pressure test device 102 Fluid injection device 103 Piping 104 Connector gripping part 105 Base 106, 107 Catheter hub gripping part 106a, 106b, 107a, 107b Support

Claims (11)

In a pressure test apparatus for inspecting pressure resistance by injecting fluid into the lumen of a catheter having a catheter hub,
A catheter hub gripping part for detachably gripping the catheter hub;
A connector connected to receive the proximal side of the catheter hub and injecting fluid into the lumen of the catheter;
A connector gripping part that tightly attaches the connector and the catheter hub by sandwiching the catheter hub to which the connector is connected with the catheter hub gripping part;
When the catheter hub to which the connector is connected is sandwiched between the catheter hub gripping part and the connector gripping part, an annular sealing surface formed on a step provided over the entire circumference of the catheter hub, and the sealing A pressure-resistant inspection device in which a sealing surface of a connector provided so as to correspond to a stop surface comes into contact with each other to be sealed.   The step portion of the catheter hub is formed by a saddle-shaped intermediate projection, and the catheter hub gripping portion is intermediate at a position facing the surface opposite to the sealing surface formed on the intermediate projection of the catheter hub. The pressure | voltage resistant test | inspection apparatus of Claim 1 which has a mechanism which supports a projection part. In a connection structure for connecting a catheter hub having a lumen communicable with the lumen of the catheter body constituting the catheter and a connector having a lumen communicable with the lumen of the catheter hub,
The catheter hub has the lumen extending from the distal end opening to the proximal end opening, and the outer peripheral portion located between the distal end opening and the proximal end opening has a whole thereof. A step is formed over the circumference, and an annular sealing surface is formed on the step,
The connector has the lumen from a distal end opening to a proximal opening, the lumen being receivable from the distal end opening to the proximal side of the catheter hub; In the vicinity of the distal end opening, a sealing surface corresponding to the sealing surface of the catheter hub is formed so as to surround the distal end opening,
A connection structure in which the sealing surface of the catheter hub and the sealing surface of the connector are brought into contact with each other by an external stress and are brought into close contact with each other while maintaining the sealing therebetween.   The connection structure according to claim 3, wherein an elastic material is provided on a sealing surface of the catheter hub and / or a sealing surface of the connector. In a catheter hub having a lumen capable of communicating with a lumen of a catheter body constituting the catheter,
The lumen of the catheter hub is formed from the distal end opening to the proximal end opening of the catheter hub, and is an outer periphery located between the distal end opening and the proximal end opening. A catheter hub in which a step portion is formed on the entire portion, and an annular sealing surface is formed on the step portion.   The catheter hub according to claim 5, wherein the step portion of the catheter hub is formed by a hook-shaped intermediate protrusion.   The catheter hub according to claim 5 or 6, wherein the sealing surface is provided so as to face the proximal end opening side.   The catheter hub according to claim 5, wherein an elastic material is provided on the sealing surface.   The catheter hub according to any one of claims 5 to 8, wherein a male screw portion and / or a taper is formed in an inner peripheral portion in the vicinity of the proximal end opening. A connector connectable to the catheter hub according to any one of claims 5 to 9,
The connector has the lumen from a distal end opening to a proximal opening, the lumen being receivable from the distal end opening to the proximal side of the catheter hub;
A sealing surface corresponding to the sealing surface of the catheter hub is formed in the vicinity of the distal end opening so as to be able to contact the sealing surface of the catheter hub so as to surround the distal end opening. connector. The connector according to claim 10, wherein the lumen can receive a portion extending from a proximal end opening of the catheter hub to a sealing surface formed in a stepped portion.

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