CN221618238U - Disposable nasal catheter - Google Patents

Abstract

The utility model provides a disposable nasal catheter, which comprises a catheter assembly, wherein the catheter assembly comprises a flexible catheter, a conical connecting pipe, a middle pipe body, a first connecting pipe and a transmission through hole; the nasal obstruction component comprises a limiting pipe sleeve; the joint assembly comprises a transmission joint and a second connecting pipe communicated with the transmission joint, the second connecting pipe is connected with the guide core assembly in a matched mode, the guide core assembly is arranged on one side of the joint assembly and comprises a first guide core and a second guide core which are movably arranged in the flexible guide pipe, and a guide core pulling block fixed on one side of the first guide core, the guide core pulling block is arranged on one side of the transmission joint, the first guide core and the second guide core are integrally arranged, an obtuse angle inclination is formed between the first guide core and the second guide core, so that one end of the flexible guide pipe is bent and inclined towards one side.

Description

Disposable nasal catheter

Technical Field

The utility model belongs to the technical field of nasal catheters, and particularly relates to a disposable nasal catheter.

Background

The patient can lead to the lower jaw and the muscle of tongue part to relax after going through general anesthesia operation owing to the medicine remains for the tongue body moves backward and leads to the tongue root portion to block up pharyngeal cavity and influence patient's normal breathing, consequently in current clinical use, through inserting a nose pipe into patient's pharyngeal cavity through patient's nose in order to prevent the condition that the pharyngeal cavity is blocked, in order to be convenient for the insertion of nose pipe, the nose pipe is a straight tube of being made by flexible material generally, but because the nasal cavity of human body sets up with the pharyngeal cavity angulation, and is close to the right angle, if directly stretch into the pharyngeal cavity with flexible nose pipe through the nasal cavity directly, can lead to the nose pipe can be withstood by the muscle of pharyngeal portion and nasal cavity when stretching into the juncture of nasal cavity and pharyngeal cavity, need medical staff frequent many times adjust angle and position of flexible pipe, make when stretching into the pharyngeal cavity with the nose pipe comparatively troublesome, inconvenient clinical use.

Disclosure of utility model

In order to solve the technical problems, the utility model provides a disposable nasal catheter to solve the technical problems set forth in the background art.

The utility model provides the following technical scheme, a disposable nasal catheter, comprising:

The catheter assembly comprises a flexible catheter, a conical connecting pipe fixedly arranged at one end of the flexible catheter, a middle pipe body fixedly arranged at one end of the conical connecting pipe, a first connecting pipe fixedly arranged at one end of the middle pipe body and a plurality of transmission through holes arranged on the flexible catheter, wherein the flexible catheter, the conical connecting pipe, the middle pipe body and the first connecting pipe are all communicated;

the nasal obstruction component is movably arranged on the catheter component and comprises a limiting pipe sleeve arranged on the periphery of the middle pipe body, and the limiting pipe sleeve is arranged in a conical shape;

The joint assembly is arranged on one side of the catheter assembly and comprises a transmission joint and a second connecting pipe communicated with the transmission joint, and the second connecting pipe is connected with the first connecting pipe in a matched mode;

The guide core assembly is arranged on one side of the joint assembly and comprises a first guide core, a second guide core and a guide core pulling block, wherein the first guide core and the second guide core are movably arranged in the flexible guide pipe, the guide core pulling block is fixed on one side of the first guide core, the guide core pulling block is arranged on one side of the transmission joint, the first guide core and the second guide core are integrally arranged, and an obtuse angle is formed between the first guide core and the second guide core in an inclined manner so that one end of the flexible guide pipe is in a bent shape;

The included angle between the first guide core and the second guide core is 162-168 degrees, and the length ratio between the first guide core and the second guide core is 8:1-10:1.

Compared with the prior art, the application has the beneficial effects that: when in actual use, because the first guide core and the second guide core are arranged in an obtuse angle and incline, when the first guide core and the second guide core extend into the flexible guide pipe, the flexible guide pipe is also inclined, so when the guide pipe assembly extends into the nasal cavity, until the guide pipe assembly extends into the joint position of the nasal cavity and the pharyngeal cavity, the first guide core and the second guide core are driven to rotate by the rotary guide core pulling block at the moment, the inclination direction of the whole guide pipe assembly is changed, the flexible guide pipe is gradually adjusted to incline towards the direction of the pharyngeal cavity, the guide pipe assembly is continuously extended into the pharyngeal cavity at the moment, meanwhile, the first guide core and the second guide core are arranged in an obtuse angle and incline, the flexible guide pipe cannot be jacked by the muscles of the pharyngeal portion and the nasal portion when the flexible guide pipe extends into the joint position of the nasal cavity, the flexible guide pipe is inclined by the first guide core and the second guide core, so that the flexible guide pipe extends into the pharyngeal cavity, and the flexible guide pipe is more convenient to operate, and clinical use is convenient.

Preferably, a supporting spring is arranged in the flexible conduit, the supporting spring is propped against the inner wall of the flexible conduit, and the first guide core and the second guide core penetrate through the supporting spring.

Preferably, the inner wall of the limiting pipe sleeve is fixedly provided with two symmetrically arranged limiting clamping strips, each limiting clamping strip comprises a first limiting strip and a second limiting strip fixed on one side of the first limiting strip, and the distance between the two second limiting strips gradually decreases along the direction from the transmission joint to the limiting pipe sleeve.

Preferably, the outer circumferential surface of the middle pipe body is provided with a plurality of annular convex strips arranged at intervals, and the convex strips are correspondingly arranged with the second limiting strips.

Preferably, a plurality of first spiral connecting blocks are arranged on the outer wall of the first connecting pipe, and a plurality of second spiral connecting blocks which are arranged corresponding to the first spiral connecting blocks are arranged on the inner wall of the second connecting pipe.

Preferably, the two sides of the guide core pulling block are symmetrically fixed with first limit wing plates.

Preferably, a concave part is arranged on one side of the guide core pulling block away from the first guide core, and an elastic head is fixed on one side of the second guide core away from the first guide core.

Preferably, the outer wall of the transmission joint is symmetrically and fixedly provided with a second limit wing plate, and the outer wall of the limit pipe sleeve is symmetrically and fixedly provided with a third limit wing plate which is correspondingly arranged with the second limit wing plate.

Preferably, the first guide core and the second guide core are both spiral spring structures made of stainless steel materials.

Preferably, the transmission joint comprises a plurality of transmission pipes which are coaxially arranged and the diameters of which are gradually increased outwards from the axis of the transmission joint, and the plurality of transmission pipes are communicated with the second connecting pipe.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a disposable nasal catheter provided in an embodiment of the present utility model;

FIG. 2 is a perspective view of a catheter assembly provided in an embodiment of the present utility model;

FIG. 3 is a perspective view of a nasal prong assembly provided by an embodiment of the present utility model;

FIG. 4 is a perspective view of a joint assembly according to an embodiment of the present utility model;

FIG. 5 is a perspective view of a joint assembly according to an embodiment of the present utility model from another perspective;

FIG. 6 is a perspective view of a guide core assembly according to an embodiment of the present utility model;

FIG. 7 is an internal block diagram of a flexible catheter provided in an embodiment of the utility model;

Fig. 8 is a cross-sectional view of a limiting sleeve according to an embodiment of the present utility model.

Reference numerals illustrate:

The utility model will be further described with reference to the accompanying drawings.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended to illustrate embodiments of the utility model and should not be construed as limiting the utility model.

In the description of the embodiments of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

In the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

In an embodiment of the present utility model, as shown in fig. 1, a disposable nasal catheter comprises a catheter assembly 4, a nasal plug assembly 3, a connector assembly 2 and a guide core assembly 1;

Specifically, the nasal plug assembly 3 is used for clamping the nose of a patient so as to adjust the extending length of the catheter assembly 4, the joint assembly 2 is used for connecting an oxygen pipe or other transmission pipelines and inputting corresponding medicine or oxygen to the pharynx of the patient through the catheter assembly 4, and the guide core assembly 1 is used for improving the rigidity of the whole catheter assembly 4 so as to facilitate the extending of the catheter assembly 4 into the pharynx of the patient,

As shown in fig. 2, the catheter assembly 4 includes a flexible catheter 41, a tapered connection tube 46 fixedly disposed at one end of the flexible catheter 41, a middle tube 45 fixedly disposed at one end of the tapered connection tube 46, a first connection tube 43 fixedly disposed at one side of the middle tube 45, and a plurality of transmission through holes 42 disposed on the flexible catheter 41, wherein the flexible catheter 41, the tapered connection tube 46, the middle tube 45 and the first connection tube 43 are all disposed in communication;

Specifically, the flexible catheter 41 is made of PVC or silica gel, and may be bent at will, the tapered connection tube 46 is convenient to connect the flexible catheter 41 with the middle tube 45, the first connection tube 43 is used for connecting the catheter assembly 4 with the connector assembly 2, during practical use, oxygen or liquid medicine is sequentially input into the first connection tube 43, the middle tube 45 and the tapered connection tube 46 through the connector assembly 2 by extending the flexible catheter 41 into the pharyngeal cavity through the nasal cavity of the patient, and finally is input into the flexible catheter 41, and a plurality of evenly distributed transmission through holes 42 are formed in one end, away from the tapered connection tube 46, of the flexible catheter 41, and oxygen or liquid medicine is conveyed to the pharyngeal portion of the patient through the transmission through holes 42.

As shown in fig. 3, the nose plug assembly 3 is movably disposed on the catheter assembly 4, the nose plug assembly 3 includes a limiting tube sleeve 31 disposed at the periphery of the middle tube 45, and the limiting tube sleeve 31 is disposed in a conical manner;

Specifically, the limiting sleeve 31 is specifically tapered to match the nasal cavity shape of the patient, and when in actual use, after the catheter assembly 4 is inserted into the nasal cavity, the insertion length of the flexible catheter 41 can be limited by the nasal plug assembly 3, so as to meet the use requirement of the patient without using the catheter.

As shown in fig. 4 and 5, the joint assembly 2 is disposed on one side of the catheter assembly 4, the joint assembly 2 includes a transmission joint 21 and a second connection pipe 23 disposed in communication with the transmission joint 21, and the second connection pipe 23 is connected with the first connection pipe 43 in a matching manner;

Specifically, the joint assembly 2 is connected to the first connecting tube 43 in the catheter assembly 4 through the second connecting tube 23, and the delivery joint 21 is used for connecting a corresponding delivery tube, which inputs oxygen or liquid medicine to be delivered into the second connecting tube 23 and into the catheter assembly 4 through the first connecting tube 43.

As shown in fig. 6, the guide core assembly 1 is disposed on one side of the joint assembly 2, the guide core assembly 1 includes a first guide core 12 and a second guide core 13 movably disposed in the flexible conduit 41, and a guide core pulling block 11 fixed on one side of the first guide core 12, the guide core pulling block 11 is disposed on one side of the transmission joint 21, the first guide core 12 and the second guide core 13 are integrally disposed, and an obtuse angle is formed between the first guide core 12 and the second guide core 13, so that one end of the flexible conduit 41 is curved;

Specifically, the first guide core 12 and the second guide core 13 have certain rigidity, so that when in use, the first guide core 12 and the second guide core 13 extend into the flexible guide pipe 41 through the transmission connector 21, the second connection pipe 23 and the first connection pipe 43, and the rigidity of the flexible guide pipe 41 can be improved through the first guide core 12 and the second guide core 13, so that when the flexible guide pipe 41 extends into the nasal cavity and the pharyngeal cavity, the situation that the flexible guide pipe 41 cannot extend into a designated position due to too softness is avoided, meanwhile, when in actual use, the first guide core 12 can be in a horizontal state, the second guide core 13 is in an inclined state, and the second guide core 13 is arranged on one side of the first guide core 12 away from the guide core pulling block 11, therefore, after the first guide core 12 and the second guide core 13 extend into the flexible guide pipe 41, one end of the flexible guide pipe 41 can also incline along with the inclination of the second guide core 13, when the flexible conduit 41 stretches into the nasal cavity, the first guide core 12 and the second guide core 13 can be driven to rotate by rotating the guide core pulling block 11 until the flexible conduit 41 stretches into the junction position of the nasal cavity and the pharyngeal cavity, the inclination direction of the whole flexible conduit 41 is changed, the flexible conduit 41 is gradually adjusted to incline towards the direction of the pharyngeal cavity, the flexible conduit 41 is continuously stretched into the pharyngeal cavity, meanwhile, the flexible conduit 41 is not propped against the muscles of the pharyngeal portion and the nasal portion when stretching into the junction position of the nasal cavity and the pharyngeal cavity because the first guide core 12 and the second guide core 13 are arranged in an obtuse angle, the flexible conduit 41 is inclined through the first guide core 12 and the second guide core 13 to play a guiding role, the process of stretching the flexible conduit 41 into the pharyngeal cavity is more convenient, the operation is easy, the clinical use is convenient, and the flexible conduit 41 reaches the pharyngeal portion of a patient, the first guide core 12 and the second guide core 13 are pulled out through the guide core pulling block 11, and then oxygen or liquid medicine can be delivered to the pharynx of the patient through the joint assembly 2 and the flexible catheter 41.

The included angle between the first guide core 12 and the second guide core 13 is 162-168 degrees, and the length ratio between the first guide core 12 and the second guide core 13 is 8:1-10:1;

Specifically, through reasonable setting first lead 12 with contained angle between the second lead 13 promptly when the contained angle is 162 ~ 168, in order to avoid appearing flexible pipe 41 can not be held against the condition by the muscle of pharyngeal portion and nasal part when stretching into the handing-over position of nasal cavity and pharyngeal cavity, the actual course of working of also being convenient for simultaneously, simultaneously through setting up first lead 12 with the length ratio of second lead 13 to the adaptation is in the length ratio of nasal cavity and pharyngeal cavity, avoids appearing leading the condition that flexible pipe 41 can't insert the assigned position because of second lead 13 length overlength, simultaneously in actual use, also can suitably enlarge the contained angle scope between first lead 12 with the second lead 13 to children and special patient.

As shown in fig. 7, in the present embodiment, a supporting spring 48 is disposed in the flexible conduit 41, the supporting spring 48 abuts against the inner wall of the flexible conduit 41, and the first guide core 12 and the second guide core 13 penetrate through the supporting spring 48;

Specifically, by arranging the supporting spring 48 on the inner wall of the flexible conduit 41, on one hand, the supporting spring is used for improving the self strength of the flexible conduit 41, ensuring the integrity of the transmission channel inside the flexible conduit 41, avoiding the deformation of the flexible conduit 41, on the other hand, being convenient for the bending of the flexible conduit 41, and meanwhile, the supporting spring 48 can also be arranged on the inner wall of the flexible conduit 41, namely, between the outer wall of the flexible conduit 41 and the inner wall of the flexible conduit 41, so as to prevent the first guide core 12 and the second guide core 13 from hooking the supporting spring 48.

As shown in fig. 8, in the present embodiment, two symmetrically disposed limiting clamping strips 33 are fixedly disposed on the inner wall of the limiting sleeve 31, the limiting clamping strips 33 include a first limiting strip 331 and a second limiting strip 332 fixed on one side of the first limiting strip 331, and the distance between the two second limiting strips 332 gradually decreases along the direction from the transmission joint 21 to the limiting sleeve 31;

Specifically, in the actual use process, the clamping force of the limiting pipe sleeve 31 to the intermediate pipe body 45 can be adjusted by adjusting the length of the intermediate pipe body 45 extending into the limiting pipe sleeve 31, so as to be suitable for different use situations.

In this embodiment, the outer circumferential surface of the middle tube 45 is provided with a plurality of annular protruding strips 47 arranged at intervals, and the protruding strips 47 are arranged corresponding to the second limiting strips 332;

Specifically, by arranging a plurality of protruding strips 47, and the second limiting strips 332 can be clamped between two adjacent protruding strips 47, so that the limiting capability of the limiting sleeve 31 to the middle pipe body 45 can be improved through the limiting of the protruding strips 47 and the second limiting strips 332.

In this embodiment, the outer wall of the first connecting pipe 43 is provided with a plurality of first spiral connecting blocks 44, and the inner wall of the second connecting pipe 23 is provided with a plurality of second spiral connecting blocks 24 corresponding to the first spiral connecting blocks 44;

Specifically, in actual use, the first connecting tube 43 may be screwed into the second connecting tube 23, so that the first spiral connecting block 44 is matched with the second spiral connecting block 24, locking of the first connecting tube 43 and the second connecting tube 23 is completed, and meanwhile, the first connecting tube 43 may be separated from the second connecting tube 23 by reverse screwing.

In this embodiment, the first limit wing plates 15 are symmetrically fixed on two sides of the core-guiding pull block 11;

In particular, the insertion of the guide core pull block 11 into the transmission joint 21 can be avoided by providing the first limit wing 15.

In this embodiment, a recess 16 is provided on a side of the core pulling block 11 away from the first core 12, and an elastic head 14 is fixed on a side of the second core 13 away from the first core 12;

Specifically, the recess 16 is provided, and the recess 16 is matched with the shape of a finger, so that the process of pulling the guide core pulling block 11 is facilitated, and the elastic head 14 is provided, so that the first guide core 12 and the second guide core 13 are pulled out.

In this embodiment, the outer wall of the transmission joint 21 is symmetrically and fixedly provided with a second limit wing plate 22, and the outer wall of the limit pipe sleeve 31 is symmetrically and fixedly provided with a third limit wing plate 32 corresponding to the second limit wing plate 22;

Specifically, by setting the second limiting wing plate 22, the position between the transmission connector 21 and the limiting tube sleeve 31 can be limited, and the third limiting wing plate 32 can be used for limiting the position of the limiting tube sleeve 31, so that the limiting tube sleeve 31 is prevented from fully penetrating into the nasal cavity of the patient.

In this embodiment, the first guide core 12 and the second guide core 13 are both made of stainless steel and have a coil spring-like structure;

Specifically, the first guide core 12 and the second guide core 13 are made of stainless steel, which has high strength, and the first guide core 12 and the second guide core 13 are provided with spring structures, so that the first guide core 12 and the second guide core 13 can be freely bent and inclined.

In this embodiment, the transmission joint 21 includes a plurality of transmission pipes coaxially disposed and having diameters sequentially increasing outward from the axis of the transmission joint 21, and the plurality of transmission pipes are all disposed in communication with the second connection pipe 23;

specifically, through setting up the transmission pipe of a plurality of pipe diameters difference, can adapt to different transmission pipeline.

In summary, in practical use, since the first guide core 12 and the second guide core 13 are arranged at an obtuse angle in an inclined manner, when the first guide core 12 and the second guide core 13 extend into the flexible guide pipe 41, the flexible guide pipe 41 is also arranged at an inclined manner, so that when the guide pipe assembly 4 extends into the nasal cavity, the first guide core 12 and the second guide core 13 are driven to rotate by rotating the guide core pulling block 11 until the guide pipe assembly 4 extends into the junction position of the nasal cavity and the pharyngeal cavity, the inclination direction of the whole guide pipe assembly 4 is changed, the flexible guide pipe 41 is gradually adjusted to incline towards the direction of the pharyngeal cavity, and meanwhile, the guide pipe assembly 4 is continuously extended into the pharyngeal cavity, and meanwhile, the flexible guide pipe 41 is not pushed by muscles of the pharyngeal cavity and the nasal cavity when the guide pipe assembly 4 extends into the junction position of the nasal cavity, the first guide core 12 and the second guide core 13 enable the flexible guide pipe 41 to incline, so that the guide pipe 41 is guided, and the flexible guide pipe 41 is easier to extend into the pharyngeal cavity, and the clinical use is convenient.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A disposable nasal catheter, comprising:

The catheter assembly comprises a flexible catheter, a conical connecting pipe fixedly arranged at one end of the flexible catheter, a middle pipe body fixedly arranged at one end of the conical connecting pipe, a first connecting pipe fixedly arranged at one end of the middle pipe body and a plurality of transmission through holes arranged on the flexible catheter, wherein the flexible catheter, the conical connecting pipe, the middle pipe body and the first connecting pipe are all communicated;

the nasal obstruction component is movably arranged on the catheter component and comprises a limiting pipe sleeve arranged on the periphery of the middle pipe body, and the limiting pipe sleeve is arranged in a conical shape;

The joint assembly is arranged on one side of the catheter assembly and comprises a transmission joint and a second connecting pipe communicated with the transmission joint, and the second connecting pipe is connected with the first connecting pipe in a matched mode;

The guide core assembly is arranged on one side of the joint assembly and comprises a first guide core, a second guide core and a guide core pulling block, wherein the first guide core and the second guide core are movably arranged in the flexible guide pipe, the guide core pulling block is fixed on one side of the first guide core, the guide core pulling block is arranged on one side of the transmission joint, the first guide core and the second guide core are integrally arranged, and an obtuse angle is formed between the first guide core and the second guide core in an inclined manner so that one end of the flexible guide pipe is in a bent shape;

The included angle between the first guide core and the second guide core is 162-168 degrees, and the length ratio between the first guide core and the second guide core is 8:1-10:1.

2. The disposable nasal catheter of claim 1, wherein a support spring is disposed within the flexible catheter, the support spring abutting against an inner wall of the flexible catheter, the first and second guide cores extending through the support spring.

3. The disposable nasal catheter according to claim 1, wherein two symmetrically arranged limiting clamping strips are fixedly arranged on the inner wall of the limiting tube sleeve, each limiting clamping strip comprises a first limiting strip and a second limiting strip fixed on one side of the first limiting strip, and the distance between the two second limiting strips gradually decreases along the direction from the transmission joint to the limiting tube sleeve.

4. The disposable nasal catheter according to claim 3, wherein the outer circumferential surface of the intermediate tube body is provided with a plurality of annular spaced ribs, and the ribs are disposed corresponding to the second limiting ribs.

5. The disposable nasal catheter according to claim 1, wherein a plurality of first screw connection blocks are provided on an outer wall of the first connection tube, and a plurality of second screw connection blocks corresponding to the first screw connection blocks are provided on an inner wall of the second connection tube.

6. The disposable nasal catheter of claim 1, wherein the first limit wing plates are symmetrically fixed on both sides of the guide core pulling block.

7. The disposable nasal catheter of claim 1, wherein the side of the guide core pulling block away from the first guide core is provided with a recess, and the side of the second guide core away from the first guide core is fixed with an elastic head.

8. The disposable nasal catheter according to claim 1, wherein the outer wall of the delivery connector is symmetrically and fixedly provided with a second limit wing plate, and the outer wall of the limit sleeve is symmetrically and fixedly provided with a third limit wing plate corresponding to the second limit wing plate.

9. The disposable nasal catheter of claim 1, wherein the first and second guide cores are each a coil spring-like structure made of stainless steel.

10. The disposable nasal catheter of claim 1, wherein the delivery connector comprises a plurality of delivery tubes coaxially disposed and sequentially increasing in diameter outwardly from the axis of the delivery connector, the plurality of delivery tubes each being disposed in communication with the second connecting tube.