CN219375868U - Catheter seat and catheter seat assembly - Google Patents

Abstract

A catheter hub and catheter hub assembly for improving the poor adhesion of a catheter to the catheter hub, the catheter hub comprising a body including an interior cavity therethrough, the interior cavity including a distal catheter hub, an inner surface of the catheter hub being adapted to adhere to an outer surface of the catheter with a fluid adhesive; the catheter hub has a fluid adhesive injection location, a proximal end of the catheter hub is sloped to an inside surface of the fluid adhesive injection location, and a proximal end of the catheter hub is a minimum end for the fluid adhesive to flow along the inside surface.

Description

Catheter seat and catheter seat assembly

Technical Field

The utility model relates to a medical apparatus, in particular to a catheter seat and a catheter seat assembly.

Background

Microcatheter systems are important medical devices in interventional procedures for delivering medical devices/implants into a patient's blood vessel. For example, in the treatment of endovascular aneurysms, a vaso-occlusive device (e.g., a helically wound coil) is delivered to and secured within a blood vessel or aneurysm by a microcatheter system that is microcatheter-based and connected by a catheter hub.

The catheter is inserted into the catheter cavity of the catheter seat and is bonded by the fluid adhesive, after the catheter is inserted into the catheter cavity of the catheter seat, the fluid adhesive flows between the outer side surface of the catheter and the inner side surface of the catheter cavity, flows to the proximal end of the outer side surface of the catheter and the proximal end of the inner side surface of the catheter cavity, and is solidified, and a bonding block is formed between the outer side surface of the catheter and the inner side surface of the catheter cavity to realize bonding. The catheter lumen has a cylindrical inner side surface, the catheter also has a cylindrical outer side surface, and the diameter of the catheter lumen is only slightly larger than the diameter of the catheter, so that after the catheter is inserted into the catheter lumen, the radial dimension of an annular space formed between the catheter and the catheter lumen for the fluid adhesive to flow is extremely small, the fluid adhesive is subjected to large flow resistance when flowing into the annular space, so that the fluid adhesive is difficult to flow to a target position, namely difficult to flow to the proximal end of the catheter lumen and solidify to form an adhesive block, the proximal end of the catheter lumen is difficult to adhere to the catheter, and the middle section of the catheter lumen solidifies to form an adhesive block, so that the proximal end of the catheter lumen is not adhered to the proximal end of the catheter, the strength of adhesive connection between the catheter and the catheter lumen is reduced, and the adhesive connection between the catheter and the catheter hub is easy to fail.

Disclosure of Invention

The utility model aims to provide a catheter seat and a catheter seat assembly, which are used for improving the situation that the adhesion between a catheter and the catheter seat is not firm.

In a first aspect, the present utility model provides a catheter hub, according to an embodiment of the present utility model, comprising a body including a lumen therethrough, the lumen including a distal catheter hub, an inner side surface of the catheter hub for bonding with an outer side surface of the catheter by a fluid adhesive;

the catheter hub has a fluid adhesive injection location, a proximal end of the catheter hub is sloped to an inside surface of the fluid adhesive injection location, and a proximal end of the catheter hub is a minimum end for the fluid adhesive to flow along the inside surface.

In one or more embodiments, the inner side surface comprises a conical surface.

In one or more embodiments, the conical surface has a conical angle of 1 ° to 3 °.

In one or more embodiments, the body further includes a glue injection hole in communication with the catheter hub.

In one or more embodiments, the body further includes a vent hole in communication with the conduit plug section.

In one or more embodiments, the vent and the glue injection hole are located opposite the conduit plug section.

In one or more embodiments, the body includes a distal stress diffuser plug section for plugging a stress diffuser, an outer side surface of the stress diffuser plug section having a protrusion for inserting into a groove of an inner side surface of the stress diffuser.

In one or more embodiments, the projections include barb structures.

In one or more embodiments, the lumen further comprises a guide segment communicating with the proximal end of the catheter hub, the inner side surface of the guide segment being sloped, the diameter of the guide segment increasing from distal to proximal.

In one or more embodiments, the inner side surface of the guide section comprises a conical surface.

In one or more embodiments, the conical angle of the conical surface is 9 ° to 11 °.

In a second aspect, the present utility model provides a catheter hub assembly, according to an embodiment of the present utility model, comprising a catheter, a stress diffuser, and a catheter hub as described above;

the proximal end of the catheter is inserted into the catheter insertion section of the catheter seat, and the inner side surface of the catheter insertion section is bonded with the outer side surface of the catheter through a fluid adhesive;

the body includes a distal stress diffuser plug section that is inserted into the stress diffuser.

In one or more embodiments, the catheter hub includes a bore at a proximal end face and communicates with other portions of the lumen through the bore, the bore being smaller than the lumen of the catheter.

In one or more embodiments, the diameter of the aperture is 0.01 to 0.03 millimeters smaller than the diameter of the lumen of the catheter.

The embodiment of the utility model has at least the following beneficial effects:

the fluid adhesive flows along the inclined inner side surface at the catheter insertion section, thereby tending to flow from the distal end to the proximal end, and the fluid adhesive is reinforced by the inclined inner side surface from the distal to proximal flow, flows easily to the proximal end of the catheter insertion section and the catheter, and solidifies to form an adhesive mass for bonding.

Drawings

The above and other features, properties and advantages of the present utility model will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:

FIG. 1 is an oblique view of a catheter hub;

FIG. 2 is a top view of a catheter hub;

FIG. 3 is a cross-sectional view of the catheter hub at A-A in FIG. 2;

FIG. 4 is a perspective assembly view of the catheter hub assembly;

FIG. 5 is a cross-sectional view of the catheter hub assembly at B-B in FIG. 4;

reference numerals:

0-catheter hub assembly;

1-a catheter holder;

11-a body;

111-a stress diffusion tube plug section;

1111-protrusions;

12-inner cavity;

121-a catheter hub;

1211-hole;

122-a pilot segment;

13-injecting glue holes;

14-exhaust holes;

15-a hand-held part;

2-a catheter;

3-stress diffusion tube;

31-grooves;

4-introducer sheath.

Detailed Description

Reference now will be made in detail to embodiments of the utility model, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation, not limitation, of the utility model. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made in the present utility model without departing from the scope or spirit of the utility model. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. Accordingly, it is intended that the present utility model cover the modifications and variations of this utility model provided they come within the scope of the appended claims and their equivalents.

The terms "first" and "second" may be used interchangeably to distinguish one feature from another.

It should be noted that, in the present application, the end of the catheter hub/catheter hub assembly that is proximal to the operator is referred to as the "proximal end" and the end that is distal to the operator is referred to as the "distal end" and, in accordance with this principle, defines the "proximal end" and the "distal end" of any component of the catheter hub/catheter hub assembly. "axial" refers generally to the longitudinal direction of the catheter hub/catheter hub assembly as it is delivered, and "radial" refers generally to the direction of the hub/catheter hub assembly perpendicular to its "axial" direction, and defines the "axial" and "radial" directions of any of the components of the catheter hub/catheter hub assembly in accordance with this principle.

Fig. 4 shows a perspective assembly of the catheter hub assembly 0 with the stress riser 3 disconnected from the distal end of the catheter hub 1 for ease of viewing the structure. As shown in fig. 4, the catheter hub assembly 0 comprises a catheter hub 1, a catheter 2 and a stress riser 3, the proximal end of the catheter 2 being inserted into the distal end of the catheter hub 1, the distal end of the catheter hub 1 being inserted into the proximal end of the stress riser 3, the catheter hub 1, the catheter 2 and the stress riser 3 being fixedly connected in use.

Fig. 5 shows a cross-sectional view of catheter hub assembly 0 at B-B of fig. 4. With further reference to fig. 5, the distal end of the catheter 2 extends through the stress riser 3 and is connected to a patient for delivering contents such as a thrombolytic device to the patient in use. The stress diffusion tube 3 is sleeved at the distal end of the catheter holder 1, namely, the outside of the joint of the catheter 2 and the catheter holder 1, and is used for preventing the adverse phenomena of bending, fracture and the like of the catheter holder 1 and the catheter 2 due to the action of external force. Fig. 5 also shows a scenario in which catheter hub assembly 0 is used with introducer sheath 4, with the distal end of introducer sheath 4 inserted from the proximal end of catheter hub 1 and extending into the intermediate portion between the proximal and distal ends of catheter hub 1 for delivering the contents into catheter hub 1. The contents are delivered from the introducer sheath 4 into the catheter hub 1, then from the catheter hub 1 into the catheter 2, and then from the catheter 2 to the patient. Illustratively, the catheter 2 is a microcatheter.

Fig. 1 and 2 show the outer structure of the catheter hub 1 of fig. 4, and fig. 3 shows the cross-sectional structure of the catheter hub 1 of fig. 2 at A-A. As shown in fig. 3, catheter hub 1 includes a body 11, body 11 including an interior cavity 12 extending through body 11. The lumen 12 comprises a distal catheter hub 121, the catheter hub 121 illustratively having a circular cross-section and the catheter 2 illustratively also having a circular cross-section, further in connection with fig. 5, the catheter hub 121 is inserted by the proximal end of the catheter 2, the inner side surface of the catheter hub 121 being bonded to the outer side surface of the catheter 2 by a fluid adhesive in order to secure the catheter hub 121 to the catheter 2.

With continued reference to fig. 3 and 5, in the illustrated embodiment, the body 11 further includes an injection port 13, the injection port 13 communicating with the conduit insertion section 121, illustratively a radially disposed circular aperture. The proximal end of the catheter 2 is inserted into the catheter insertion section 121, and the fluid adhesive is injected into the catheter insertion section 121 through the adhesive injection hole 13, flows between the inner side surface of the catheter insertion section 121 and the outer side surface of the catheter 2, flows to the nearest end (leftmost end in the drawing) of the catheter insertion section 121 and the catheter 2, and is solidified to form an adhesive block, thereby realizing the adhesion. In another embodiment, the body 11 is configured to inject the fluid adhesive through other structures, for example, the fluid adhesive is injected not through the glue injection hole but directly through the port of the most distal end (rightmost end in the figure) of the catheter insertion section 121, flows between the inner side surface of the catheter insertion section 121 and the outer side surface of the catheter 2, flows to the most proximal end (leftmost end in the figure) of the catheter insertion section 121 and the catheter 2, and solidifies to form an adhesive block, so that bonding is achieved, but the flow path of the fluid adhesive injection is longer, and the bonding difficulty is increased.

Since the size of the catheter insertion section 121 (corresponding to the hole) is only slightly larger than the size of the catheter 2 (corresponding to the shaft), the space for the fluid adhesive to flow formed between the catheter insertion section 121 and the catheter 2 is extremely small, the fluid adhesive receives a large flow resistance when flowing therein, which makes it difficult for the fluid adhesive to flow to the target position, that is, to flow to the nearest end (leftmost end in the figure) of the catheter insertion section 121 and the catheter 2 and solidify to form an adhesive block, but solidifies to form an adhesive block at the middle part of the catheter insertion section 121, and adheres to the catheter 2, which results in that the proximal end part of the catheter insertion section 121 is not adhered to the proximal end part of the catheter 2, the adhesive strength between the catheter insertion section 121 and the catheter 2 is reduced, the adhesive is easy to fail due to external force, and the conveyed contents are jammed and other bad phenomena are caused.

With continued reference to fig. 3 and 5, to solve the above-described problem, in the illustrated embodiment, the catheter hub 121 is inclined from its proximal end to the inside surface of the fluid adhesive injection site, where the catheter hub 121 is at its smallest diameter at the proximal end and the fluid adhesive injection site is at its largest diameter, in the illustrated embodiment, where the fluid adhesive injection site is the communication site of the injection hole 13 with the catheter hub 121. After the fluid adhesive flows along the inclined inner side surface, the fluid adhesive partially moves along the inclined inner side surface in an axial-like manner after being injected from the vertical upper side of the conduit insertion section 121, flows towards the nearest end (leftmost end in the figure) of the conduit insertion section 121 and the conduit 2, the distal end of the conduit insertion section 121 is vertically higher, corresponding to the top of the slope, the proximal end of the conduit insertion section 121 is vertically lower, corresponding to the bottom of the slope, the fluid adhesive tends to flow from the top of the slope to the bottom of the slope on the inclined inner side surface, thereby tending to flow from the distal end to the proximal end, the fluid adhesive tends to flow from the far-to-near flow tendency is reinforced by the inclined inner side surface, and tends to flow to the nearest end (leftmost end in the figure) of the conduit insertion section 121 and the conduit 2, and solidifies to form an adhesive block, thereby realizing the adhesion.

With continued reference to fig. 3, in the illustrated embodiment, the catheter hub 121 is entirely sloped at its proximal end to the inside surface of the fluid adhesive injection site, but it should be understood that the foregoing segment sloped includes not only the segment's inside surface being entirely sloped but also the segment's inside surface being partially sloped, for example, in another embodiment, the catheter hub 121 includes not only the segment with the inside surface sloped but also the segment with the inside surface not being horizontally sloped, with the proximal end to the inside surface of the fluid adhesive injection site being generally sloped in a tendency to enhance fluid adhesive flow.

With continued reference to fig. 3, it will be appreciated that on the conduit segments 121, the fluid adhesive flows between their injection locations to the nearest end (leftmost end in the figure) of the conduit segments 121, with the inner side surfaces of that portion of the conduit segments 121 being sloped to enhance fluid adhesive flow and the inner side surfaces of the remaining portion of the conduit segments 121 not affecting fluid adhesive flow. In the embodiment shown in fig. 3, the inner side surfaces of the remaining catheter hub 121 are likewise inclined, i.e. the inner side surfaces of all catheter hubs 121 are inclined. In another embodiment, the inner side surface of the remaining portion of the conduit insertion section 121 is not inclined horizontally, i.e., only a portion of the inner side surface of the conduit insertion section 121 is inclined.

With continued reference to fig. 3, in the illustrated embodiment, the inclined inner side surface of the catheter hub 121 is conical, the axial cross-sectional profile is straight, and illustratively has a conical angle of 1 ° to 3 °. In another embodiment, the inclined inner side surface of the catheter hub 121 is an annular arcuate surface and the axial cross-sectional profile is an arc.

With continued reference to fig. 3 and 5, in the illustrated embodiment, the body 11 further includes an exhaust vent 14, the exhaust vent 14 communicating with the conduit plug section 121, illustratively a radially disposed circular aperture. Air is provided between the inner surface of the pipe insertion section 121 and the outer surface of the pipe 2, and if not discharged, the flow and solidification of the fluid adhesive in the flow space are hindered, for example, air forms bubbles in the solidified adhesive block, and the adhesive strength is lowered. By providing the vent hole 14, the fluid adhesive flows in the flow space, and the compressed air flows out of the conduit insertion section 121 from the vent hole 14, reducing the adverse effect of the air on the flow and solidification of the fluid adhesive. In another embodiment, the body 11 is configured to allow air to escape through other structures, such as, for example, air is not exhausted through an exhaust hole, but is exhausted directly from the port at the most distal end (rightmost end in the drawing) of the conduit insertion section 121, but the flow path of air exhaust is longer, resulting in unsmooth air exhaust, impeding the flow and solidification of the fluid adhesive.

With continued reference to fig. 3, in the illustrated embodiment, the vent hole 14 and the glue injection hole 13 are located opposite the conduit insertion section 121, with the vent hole 14 and the glue injection hole 13 being located at both radial ends of the conduit insertion section 121. In addition to the aforementioned axial-like movement, the fluid adhesive, after being injected from the injection holes 13 at the vertical top of the conduit insertion section 121, also moves circumferentially along the inner side surface, flows downward from the vertical top from both sides, presses the air at both sides down to the air discharge holes 14 at the vertical bottom, and flows out from the air discharge holes 14. The vent holes 14 located at the opposite positions of the glue injection holes 13 enable the lengths of the flow paths from the air at two sides to the vent holes 14 to be the same, and the air is discharged at the same time, and the flow direction of the air at two sides is always downward, so that the air flows more smoothly under the action of gravity, and the air is discharged more smoothly. It should be understood that the foregoing "opposite" and "radial two ends" do not constitute a limitation on the axial positions of the injection holes 13 and the exhaust holes 14, and that in the embodiment shown in fig. 3, the exhaust holes 14 are located at axially farther positions than the injection holes 13. In another embodiment, the vent hole 14 is located at a position axially closer than the glue injection hole 13, which is equivalent to the vent hole 14 serving as the glue injection hole 13 and the glue injection hole 13 serving as the vent hole 14 in the embodiment shown in fig. 3. In yet another embodiment, the glue injection hole 13 and the vent hole 14 are located at the same position in the axial direction.

With continued reference to fig. 1 and 3, in the illustrated embodiment, the body 11 includes a distal stress diffuser plug section 111, and further with reference to fig. 5, the stress diffuser plug section 111 is inserted into the stress diffuser 3, the outer side surface of the stress diffuser plug section 111 has protrusions 1111, the inner side surface of the stress diffuser 3 has corresponding grooves 31, and the protrusions 1111 of the outer side surface of the stress diffuser plug section 111 are inserted into the grooves 31 of the inner side surface of the stress diffuser 3 to prevent the stress diffuser 3 from slipping off the stress diffuser plug section 111. With continued reference to FIG. 1, in the illustrated embodiment, the projections 1111 are annular projections and the grooves 31 are correspondingly annular grooves.

With continued reference to fig. 3, in the illustrated embodiment, the projections 1111 are barbed structures with the barbs pointing proximally, the compliant stress diffuser plug section 111 inserting the stress diffuser 3 from proximal to distal, and retarding the slippage of the stress diffuser 3 from the stress diffuser plug section 111 from proximal to distal. In another embodiment, the projections 1111 are other structures, such as semi-circular projections, having a semi-circular axial cross-section. But the projections 1111 of the barb structure in the illustrated embodiment provide better resistance to movement and better resistance to connection slippage.

With continued reference to fig. 3, in the illustrated embodiment, the axial cross-section of the projection 1111 is in the shape of a right triangle with the hypotenuse facing distally and one of the right triangle's cathetus facing proximally, which cathetus forms a barb with the hypotenuse that points toward the proximally-directed barb structure. In another embodiment, projections 1111 have other barb configurations.

With continued reference to fig. 5, in the illustrated embodiment, the lumen 12 further includes a guide segment 122, the guide segment 122 communicating with the proximal end of the catheter hub 121, the distal end of the introducer sheath 4 being inserted into the guide segment 122 from a port at the proximal end of the guide segment 122 and extending into the distal end of the guide segment 122 with an axial spacing from the port at the distal end of the guide segment 122, the distal end of the introducer sheath 4 abutting against the inside surface of the guide segment 122, both the guide segment 122 and the introducer sheath 4 illustratively having circular cross sections. The inner side surface of the guiding section 122 is inclined, the diameter of the guiding section 122 gradually increases from far to near, the inclined inner side surface plays a role in guiding the guiding sheath 4, if the guiding sheath 4 is not coaxial with the guiding section 122 in the process of inserting the guiding sheath 4 into the guiding section 122 from near to far, the distal end of the guiding sheath 4 touches the inclined inner side surface of the guiding section 122 and slides on the inclined inner side surface, so that the guiding section is finally guided to a coaxial position with the guiding section 122, and the conveyed content is ensured to be coaxial with the guiding section 122 after leaving from the distal end of the guiding sheath 4.

With continued reference to fig. 3, in the illustrated embodiment, the guide section 122 includes two sections in the axial direction, both of which are inclined at their inner side surfaces, but have different inclination angles, thereby forming two sections. In another embodiment, two sections in the axial direction in the illustration have the same inclination angle and are combined into one section, and the guide section 122 includes only one section in the axial direction.

With continued reference to fig. 3, in the illustrated embodiment, the sloped inner side surface of the guide section 122 is a two-segment conical surface. In another embodiment, the inclined inner side surface of the guide section 122 includes an annular arc surface, the axial cross-sectional profile of which is an arc, for example, one of the two inner side surfaces is a conical surface, the other is an annular arc surface, and for example, both inner side surfaces are annular arc surfaces.

With continued reference to fig. 5, as previously described, the distal end of the introducer sheath 4 is axially spaced from the distal end of the guide section 122 by an axial distance D, indicated at D, to enter the guide section 122 after the delivered contents exit from the distal end of the introducer sheath 4, to enter the catheter 2 from the distal end of the guide section 122 and to be delivered by the catheter 2. During the process of passing the axial space D, the contents may be subjected to resistance and may undergo jamming or other adverse phenomena, and in the illustrated embodiment, the inner side surface of the guide section 122 connected to the proximal end of the catheter insertion section 121 has a larger inclination angle, that is, the conical inner side surface has a larger conical angle, which is illustratively 9 ° to 11 °, so as to shorten the axial space D, reduce the resistance to the contents and reduce the risk of jamming or the like of the contents.

With continued reference to fig. 3, in the illustrated embodiment, the catheter hub 121 has a bore 1211 at the proximal end face, the catheter hub 121 communicates with the guide section 122 through the bore 1211, the bore 1211 being the port distal to the guide section 122, and further with reference to fig. 5, the contents of the guide section 122 enter the catheter 2 through the bore 1211 and are continuously conveyed within the catheter 2. The hole 1211 needs to be aligned with the inner cavity of the catheter 2 to ensure that the content smoothly enters the catheter 2, and if the hole 1211 is not aligned with the inner cavity of the catheter 2, for example, due to factors such as manufacturing errors and/or assembly errors, the tube wall of the catheter 2 is exposed from the hole 1211, so that the content is easy to strike the tube wall of the catheter 2 in the process of entering the catheter 2 from the hole 1211, and is blocked by the tube wall of the catheter 2, thereby causing adverse phenomena such as clamping stagnation of the content. In the illustrated embodiment, the bore 1211 is smaller than the lumen of the catheter 2, which allows the bore 1211 to align with the lumen of the catheter 2 even under the influence of certain manufacturing and/or assembly errors, allowing for smooth entry of the contents into the catheter 2, reducing the risk of undesirable effects such as jamming of the contents. With further reference to fig. 3, the diameter of the bore 1211 is denoted as d, and in the illustrated embodiment, the diameter d of the bore 1211 is 0.01 mm to 0.03 mm less than the diameter of the lumen of the catheter 2 to accommodate the aforementioned manufacturing and/or assembly errors.

With continued reference to fig. 1 and 2, in the illustrated embodiment, catheter hub 1 further includes a handpiece 15 for an operator to handle catheter hub 1, handpiece 15 being located on either radial side of body 11 and fixedly attached to body 11, handpiece 15 being illustratively a two-piece symmetrical airfoil and illustratively having a trapezoidal profile.

Although the utility model has been described in terms of embodiments, it is not intended to be limited thereto, and variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the utility model.

Claims (14)

1. A catheter hub comprising a body, said body comprising an interior cavity therethrough, said interior cavity comprising a distal catheter hub, an inner side surface of said catheter hub for bonding with an outer side surface of said catheter by a fluid adhesive;

the catheter hub has a fluid adhesive injection location, a proximal end of the catheter hub is sloped to an inside surface of the fluid adhesive injection location, and a proximal end of the catheter hub is a minimum end for the fluid adhesive to flow along the inside surface.

2. The catheter hub of claim 1, wherein said inner side surface comprises a conical surface.

3. The catheter hub of claim 2, wherein said conical surface has a conical angle of 1 ° to 3 °.

4. The catheter hub of claim 1, wherein said body further comprises an injection port, said injection port communicating with said catheter hub.

5. The catheter hub of claim 4, wherein said body further comprises a vent hole, said vent hole communicating with said catheter hub.

6. The catheter hub of claim 5, wherein said vent hole and said glue injection hole are located opposite said catheter hub.

7. The catheter hub of claim 1, wherein said body includes a distal stress diffuser plug section for plugging a stress diffuser, an outer surface of said stress diffuser plug section having a protrusion for inserting into a groove of an inner surface of said stress diffuser.

8. The catheter hub of claim 7, wherein said projections comprise barb structures.

9. The catheter hub of claim 1, wherein said lumen further comprises a guide section communicating with a proximal end of said catheter hub, an inner side surface of said guide section being sloped, a diameter of said guide section increasing from distal to proximal.

10. The catheter hub of claim 9, wherein an inside surface of said guide section comprises a conical surface.

11. The catheter hub of claim 10, wherein said conical surface has a conical angle of 9 ° to 11 °.

12. A catheter hub assembly comprising a catheter, a stress diffuser, and a catheter hub according to any one of claims 1 to 11;

the proximal end of the catheter is inserted into the catheter insertion section of the catheter seat, and the inner side surface of the catheter insertion section is bonded with the outer side surface of the catheter through a fluid adhesive;

the body includes a distal stress diffuser plug section that is inserted into the stress diffuser.

13. The catheter hub assembly of claim 12 wherein said catheter hub includes a bore at a proximal end face and communicates with other portions of said lumen through said bore, said bore being smaller than said lumen of said catheter.

14. The catheter hub assembly of claim 13, wherein the diameter of the bore is 0.01 mm to 0.03 mm smaller than the diameter of the lumen of the catheter.