CN110960782A

CN110960782A - Structure of urethral catheterization product

Info

Publication number: CN110960782A
Application number: CN201811133012.6A
Authority: CN
Inventors: 高翔
Original assignee: Shanghai Xianyi Medical Technology Co Ltd
Current assignee: Shanghai Xianyi Medical Technology Co Ltd
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2020-04-07
Also published as: WO2020063067A1

Abstract

The application provides a catheterization product structure, including sheath pipe, sacculus and inner core, wherein, the inside of sheath pipe has gas injection route and inner core route, and its distal end and near-end still are equipped with the urine inlet and the urination mouth of intercommunication inner core route respectively, the urine inlet is blunt shape, the inner core still has the direction end. In an initial state, the inner core is arranged in the inner core passage in a penetrating mode, the guide end extends out of the inner core passage and is exposed out of the outer sheath tube, so that the distal end of the outer sheath tube is guided to enter the bladder through the urethra of a patient through the guide end, the balloon is in an expansion state and is positioned in the bladder, and then the inner core is detached from the inner core passage, so that the exposed urine inlet, the inner core passage and the urine discharge port form a passage for discharging urine in the bladder. Therefore, the stimulation to the bladder mucosa and the urethra mucosa can be reduced, and the use comfort degree is improved.

Description

Structure of urethral catheterization product

Technical Field

The embodiment of the application relates to the technical field of medical instruments, in particular to a urethral catheterization product structure for guiding out urine in a bladder.

Background

At present, the ureter widely applied in medical clinic is the Foley ureter invented by 1930s, and the ureter of the type has the advantages of softness, elasticity, convenience in fixing, water resistance and the like compared with the prior ureter, so that the ureter is still used up to now.

For example, in 2002 in the united states, the number of visits due to Foley catheter problems alone was as high as 700 million visits with direct and indirect losses of $ 16 million, and in addition, there was a lot of immeasurable pain to the patient. These complications include urinary tract-related urinary infections and urinary tract irritation, which also cause problems such as discomfort, prolonged disease, urethral stricture, bladder stones, etc. in patients.

Through structural analysis of Foley ureters, the problems are mainly caused by structural design defects of the Foley ureters, and mainly comprise the following aspects: the protruding part (namely the guide end) of the urinary catheter bladder end easily pokes the bladder wall of a patient when the bladder of the patient is empty or the patient changes the posture, so that bladder spasm or urinary tract stimulation symptoms are induced, and the repeated poking of the bladder wall also easily destroys the epithelial protection structure of the bladder, so that urinary system infection is caused; (2) the relative position relationship of the spherical saccule structure at the urinary catheter bladder end and the drainage port ensures that a small amount of urine is still accumulated between the urinary catheter saccule and the bladder wall under the completely emptied state of the urinary catheter, and becomes stagnant water which does not flow, and the stagnant water is also an important factor for inducing urinary tract infection; (3) although the rubber structure of the urinary catheter has certain flexibility, the rubber structure is hard, so that the direct mechanical stimulation to urethral mucosa in the urinary catheter is serious, and a patient feels more obvious discomfort.

In order to solve the problems, although partial urinary catheter structures are improved, no urinary catheter structure which can systematically solve the urinary tract irritation symptoms of patients appears. In view of the above, how to solve the various problems in the prior art is the technical subject to be solved.

Disclosure of Invention

In view of the above problems, it is a primary object of the present invention to provide a urethral catheterization product structure capable of reducing irritation to the urinary bladder mucosa and the urethral mucosa.

Another object of the present invention is to provide a urinary catheterizing product structure which can reduce the urine remaining in the empty bladder to reduce the incidence of urinary tract infection.

The catheterization product structure that this application provided includes: the far end of the outer sheath tube is also provided with a urine inlet communicated with the inner core passage, the urine inlet is a blunt opening, and the near end of the outer sheath tube is provided with a urine discharge port communicated with the inner core passage; a balloon disposed at the distal end of the outer sheath and communicating with the gas injection passage, wherein the balloon is inflated by injecting gas through the gas injection passage or deflated by exhausting gas through the gas injection passage; the inner core is detachably arranged in the inner core passage of the outer sheath tube in a penetrating way and is provided with a guide end; when the inner core is arranged in the inner core passage in a penetrating way, the guide end passes through the urine inlet to extend out of the inner core passage and expose out of the outer sheath tube, and when the inner core is detached from the inner core passage, the urine inlet is exposed out, so that the urine inlet, the inner core passage and the urine outlet form a hollow passage; in an initial state, the balloon is in the contracted state, the inner core is arranged in the inner core passage in a penetrating manner, so that the distal end of the outer sheath tube is guided to enter the bladder through the urethra of the patient by virtue of the guide end of the inner core exposed out of the outer sheath tube, the balloon is arranged in the bladder, the balloon is inflated by virtue of the inflation passage to be positioned in the bladder in the expanded state, and the inner core is detached from the inner core passage, so that the urine inlet, the inner core passage and the urine discharge port form a passage, and the urine in the bladder passes through the urine inlet and is discharged through the inner core passage and the urine discharge port.

Optionally, in the above embodiments of the present application, when the balloon is in the inflated state, the urine inlet may be completely covered to avoid direct contact of the urine inlet with the bladder.

Alternatively, in the above embodiments of the present application, the sidewall of the gas injection passage is attached to or partially contacts with the sidewall of the inner core passage along an axial portion of the outer sheath, or the gas injection passage is formed in the sidewall of the inner core passage.

Optionally, in the above embodiments of the present application, the core channel comprises a membrane core channel and a flexible tube core channel, and wherein the membrane core channel is disposed in the urethra of the patient, and the insufflation channel is configured to provide support to the membrane core channel to prevent the membrane core channel from twisting or bending to maintain patency.

Optionally, in each of the above embodiments of the present application, the film core passage and the hose core passage are made of the same material or different materials, and the film core passage and the hose core passage are connected to each other through a hot melting process, an adhesive process, a coating process, a sewing process, and a welding process, or the film core passage and the hose core passage are integrally formed.

Optionally, in the above embodiments of the present application, the outer sidewall of the inner core is fitted with the inner sidewall of the inner core passage.

Optionally, in the above embodiments of the present application, the urethral catheterization product structure further includes a balloon adjusting unit disposed on the outer sheath or on the balloon for adjusting the expansion configuration of the balloon in the inflated state.

Optionally, in the above embodiments of the present application, the balloon includes a first end close to the distal end of the outer sheath and a second end far from the distal end of the outer sheath, and the balloon adjusting unit is configured to form a groove on the outer surface of the balloon when the balloon is in the inflated state, where the groove extends from the first end of the balloon to the second end of the balloon, so as to guide the residual urine in the bladder from the first end of the balloon to the second end of the balloon via the groove.

Optionally, in the above embodiments of the present application, the balloon includes a first end close to the distal end of the outer sheath and a second end far from the distal end of the outer sheath, and the balloon adjusting unit is configured to make the balloon assume a non-regular symmetrical balloon cross-sectional shape when in the inflated state, so as to guide residual urine in the bladder from the first end of the balloon to the second end of the balloon.

Optionally, in the above embodiments of the present application, the outer sheath further has a liquid discharge port communicating with the inner core passage, and the liquid discharge port is disposed at the second end of the balloon, so that the residual urine guided to the second end of the balloon flows into the liquid discharge port and is discharged through the inner core passage.

According to the technical scheme, the stimulation of the urinary catheter to bladder mucosa and urethral mucosa can be reduced to the greatest extent, the urine residue in the empty bladder state is reduced, and the aims of improving the urinary tract stimulation symptom of a patient with an indwelling urinary catheter and reducing the incidence of infection are fulfilled.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a side view of an appearance structure of a catheter product structure according to an embodiment of the present application, wherein the balloon is in a deflated state;

FIG. 2A is an exterior structural side view of a catheter product configuration according to an embodiment of the present application, with the balloon in an inflated state;

FIG. 2B is a sectional view showing the internal structure of the catheter product of FIG. 2A;

FIG. 3 is a perspective view showing the configuration of the catheter product of FIGS. 2A and 2B after the removal of the inner core;

FIGS. 4A and 4B are side views showing the structure of the urethral catheterization product of FIG. 3, wherein FIG. 4B is a schematic sectional view of FIG. 4A taken along the sectional line K-K;

FIGS. 5A and 5B are partial schematic views of the sheath tube showing the structure of the catheter product, wherein FIG. 5B is a cross-sectional view taken along the line U-U in FIG. 5A;

fig. 6A and 6B are views showing an example of an inner core passage of a structure of a urethral catheterization product, wherein fig. 6B is a partially enlarged view of fig. 6A;

FIG. 7 is a schematic exterior view of the core showing the construction of the catheterization product;

FIGS. 8A and 8B are schematic views showing an expanded configuration of the balloon in an inflated state of the catheter product construction, wherein FIG. 8B is a schematic cross-sectional view of FIG. 8A taken along section line E-E;

FIGS. 9A and 9B are schematic views showing an embodiment of a balloon adjusting unit of a catheter product structure;

FIGS. 10A and 10B are schematic views showing an embodiment in which a balloon adjusting unit is mounted on an outer sheath, wherein FIG. 10B is a partially enlarged schematic view of FIG. 10A;

FIGS. 11A and 11B are schematic views showing another embodiment of the expanded configuration of the balloon showing the configuration of the catheter product in the inflated state;

fig. 12A to 12C are schematic views showing another embodiment of the balloon adjusting unit; and

FIG. 13 is a schematic view showing the arrangement position of a liquid discharge port in the configuration of a urethral catheterization product.

Element number

1 urethral catheterization product structure

11 sheath tube

111 gas injection path

112 core passage

1121 thin film inner core passage

1122 hose core passage

113 urine inlet

114 urination orifice

115 liquid discharge port

116 gas injection port

12 saccule

121 first end of balloon

122 second end of the balloon

13 inner core

131 leading end

132 wire guide hole

133 groove

14 balloon adjusting unit

140 belt body

141 balloon adjusting device

142 ferrule

143 adjuster

144 sacculus jacket

145 opening

146 ribs

147 liquid discharge opening

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application shall fall within the scope of the protection of the embodiments in the present application.

Referring to fig. 1, fig. 2A and fig. 2B, the structure 1 of the urethral catheterization product of the present application is mainly composed of an outer sheath 11, a balloon 12 and an inner core 13.

Referring to fig. 2B, the outer sheath tube 11 has an air injection passage 111 and a core passage 112 (see fig. 4B and fig. 8B), and a urine inlet 113 communicating with the core passage 112 is formed at a distal end (i.e., a distal end away from the user) of the outer sheath tube 11, the urine inlet 113 may be a blunt opening (e.g., a flat opening) formed at a top end of the core passage 112, and a urine outlet 114 communicating with the core passage 112 is formed at a proximal end of the outer sheath tube 11.

The balloon 12 is disposed at the distal end of the outer sheath tube 11 and communicates with the gas injection passage 111. In the present embodiment, the balloon 12 surrounds the outer tube wall formed at the distal end of the outer sheath tube 11, and the proximal end of the outer sheath tube 11 further has a gas injection port 116 communicated with the gas injection passage 111, so that gas can be injected into the gas injection passage 111 through the gas injection port 116 at the proximal end to switch the balloon 12 at the distal end of the outer sheath tube 11 from the deflated state to the inflated state, or gas in the balloon 12 can be exhausted through the gas injection passage 111 and the gas injection port 116 to switch the balloon 12 from the inflated state to the deflated state.

The inner core 13 is detachably disposed in the inner core passage 112 of the outer sheath 11, and a guiding end 131 is disposed at a distal end of the inner core 13, in this embodiment, the guiding end 131 is, for example, a shuttle-shaped design, so as to provide a guiding effect when a conduit (e.g., urethra) is inserted. It should be noted that the design shape of the guiding end 131 is not limited to the shuttle shape, and other design shapes capable of providing a penetrating guiding function are all suitable for the present application. Further, a guide wire hole 132 for passing a guide wire is provided in the inner core 13.

In the present application, when the inner core 13 is disposed in the inner core passage 112, the guiding end 131 of the inner core 13 can pass through the urine inlet 113 located at the distal end of the outer sheath tube 11 to extend from the inner core passage 112 to be exposed to the outer sheath tube 11, and when the inner core 13 is detached from the inner core passage 112, the urine inlet 113 located at the distal end of the outer sheath tube 11 can be exposed, and the inner core passage 112 for accommodating the inner core 13 in the outer sheath tube 11 is also formed in a hollow state, so that the urine inlet 113, the inner core passage 112 and the urine outlet 114 are combined to form a hollow passage penetrating through the outer sheath tube 11 for fluid (e.g. urine) to pass through.

The application method of the catheterization product structure 1 of the present application is specifically as follows:

as shown in fig. 1, in the initial state, the balloon 12 at the distal end of the outer sheath tube 11 is in a contracted state, the inner core 13 is inserted into the inner core passage 112, and the guiding end 13 of the inner core 13 extends out of the urine inlet 113 of the outer sheath tube 11 and is exposed out of the outer sheath tube 11, so that the doctor can insert the urethral catheterization product structure 1 into the urethra of the patient, and make the balloon 12 at the distal end of the outer sheath tube 11 pass through the urethra of the patient and enter the bladder of the patient. In the process of insertion, the guiding end 131 exposed at the distal end of the sheath tube 11 can provide guiding function for insertion, so as to facilitate insertion operation by a doctor.

With continued reference to fig. 2A and 2B, after the balloon 12 is disposed in the bladder of the patient, the physician may perform an insufflation operation through the insufflation port 116, so that the insufflation gas enters the balloon 112 through the insufflation passage 111 to switch the balloon 12 from the deflated state shown in fig. 1 to the inflated state shown in fig. 2A and 2B, and since the insufflation port 116 is further provided with a gas valve (not shown), the gas in the balloon 12 is ensured not to leak, so that the balloon 12 is maintained in the inflated state and can be positioned in the bladder of the patient.

With continued reference to fig. 3 and fig. 4A and 4B, after the balloon 12 is positioned in the bladder of the patient, the physician can remove the inner core 13 from the inner core passage 112 through the urine outlet 114, at this time, the urine inlet 113 at the distal end of the outer sheath 11 can be exposed, and the urine inlet 113, the inner core passage 112 and the urine outlet 114 form a hollow passage, so that the urine in the bladder of the patient can flow into the inner core passage 112 from the urine inlet 113 and can be discharged out of the body of the patient through the urine outlet 114, thereby providing the technical efficacy of catheterization.

As shown, the urinary inlet 113 of the present application presents an opening in the shape of a blunt tip, which is less likely to poke the bladder mucosa of the patient. Furthermore, as is clear from fig. 4A and 4B, when the balloon 12 of the present application is in the inflated state, the urine inlet 113 with a flat opening can be completely covered therein, so as to ensure that the urine inlet 113 retracted into the balloon 12 is not easily contacted with the bladder of the patient when the bladder of the patient is in the empty state or when the patient changes posture during the use process, so that the irritation of the urinary catheter to the bladder mucosa can be reduced to the greatest extent compared with the conventional urinary catheter.

In the embodiment of the present application, the sidewall of the air injection passage 111 inside the outer sheath tube 11 and the sidewall of the core passage 112 may partially fit or partially contact each other along the axial direction of the outer sheath tube 11. However, it is not limited thereto, in another embodiment, the gas injection passage 111 may also be formed in the sidewall of the core passage 112, that is, the gas injection passage 111 itself is formed as a part of the sidewall of the core passage 112 (as shown in fig. 5A and 5B).

Referring to fig. 6A and 6B, in another embodiment, the inner core passage 112 of the present application further includes a film inner core passage 1121 and a hose inner core passage 1122, wherein the film inner core passage 1121 is disposed in the urethra of the patient, as can be seen from the drawings, since the film inner core passage 1121 has a thinner side wall, the tube diameter of the film inner core passage 11a can be significantly smaller than that of the hose inner core passage 112, so that the irritation to the urethral mucosa of the patient can be reduced by the film inner core passage 1121, so as to improve the comfort level of the patient. Meanwhile, the gas injection passage 111 formed as a portion of the sidewall of the core passage 112 may simultaneously provide support for the membrane core passage 1121 to effectively prevent the membrane core passage 1121 from being easily twisted or bent during use due to the thinner sidewall, thereby ensuring the membrane core passage 1121 to be kept smooth without affecting the discharge of urine.

In the present embodiment, the membrane core passage 1121 and the hose core passage 1122 can be made of the same material or different materials. In addition, in terms of manufacturing processes, the film core passage 1121 and the hose core passage 1122 can be connected to each other by, for example, thermal melting, bonding, cladding, sewing, welding, etc., but not limited thereto, other manufacturing processes can also be applied. In another embodiment, the membrane core passage 1121 can be integrally formed with the hose core passage 1122 (see fig. 6A and 6B).

Further, the outer sidewall of the inner core 13 of the present application is fitted with the inner sidewall of the inner core passage 112. As described above, in the present application, when the gas injection passage 111 is formed in the sidewall of the core passage 112 (as shown in fig. 5A and 5B), a groove 133 is also formed in the outer sidewall of the core 13 at a corresponding position along the axial direction to match the shape of the inner sidewall of the core passage 112.

In addition, in view of the problem that the conventional urinary catheter is easy to form effusion in the bladder of the patient, the urinary catheter product structure of the present application further comprises the balloon adjusting unit 14 and the liquid outlet 115 matched with the balloon adjusting unit. Referring to fig. 8B, the balloon 12 of the present application further includes a first end 121 close to the distal end of the sheath tube 11 and a second end 122 far from the distal end of the sheath tube 11, and the balloon adjusting unit 14 is configured to adjust the expansion configuration of the balloon 12 when the balloon 12 is in the expansion state, so as to guide the residual urine in the bladder of the patient from the first end 121 of the balloon 12 to the second end 122 of the balloon 12. The drainage port 115 (as shown in fig. 8A) is disposed on the sheath tube 11 near the second end 122 of the balloon 12 and is connected to the core passage 112 inside the sheath tube 11, so that the residual urine guided to the second end 122 of the balloon 12 flows into the drainage port 115 and is drained through the core passage 112.

Specifically, the balloon adjusting unit 14 may be selectively provided on the sheath tube 11 or the balloon 12. Also, in the present application, the balloon adjusting unit 14 may have various embodiments.

In one embodiment, the balloon adjustment unit 14 is configured to cause the balloon 12 to assume a non-regular, symmetrical balloon cross-sectional shape when in the inflated state. As shown in fig. 8B, in the present embodiment, the balloon adjustment unit 14 may be, for example, at least one band 140 disposed on the wall of the outer sheath 11, wherein the band 140 is made of, for example, an inelastic or low-elasticity material, and both ends of the band 140 are respectively fixed to the first end 121 and the second end 122 of the balloon 12, so that the balloon 12 may assume the shape of an eccentric balloon as shown in fig. 8B when in the inflated state, so that the residual urine in the bladder can be guided from the first end 121 of the balloon 12 to the second end 122 of the balloon 12, and into the liquid discharge port 115 located near the second end 122, and discharged outside the patient through the inner core passage 112 in the outer sheath 11 from the side of the balloon 12 on which the band 140 is disposed (i.e., the upper half of the balloon 12 above the outer sheath 11 in the cross-sectional view shown in fig. 8B).

In another embodiment, the balloon adjustment unit 14 may also be used to form grooves on the outer surface of the balloon 12 when the balloon 12 is in the inflated state, and the grooves extend from the first end 121 of the balloon 12 to the second end 122 of the balloon 12, so as to guide the residual urine in the bladder from the first end 121 of the balloon 12 to the second end 122 of the balloon 12.

As shown in fig. 9A and 9B, in the present embodiment, the balloon adjusting unit 14 may be, for example, a balloon adjusting device 141 additionally installed at the distal end of the sheath tube 11, and has a collar 142 and at least one adjusting element 143 disposed on the collar 142, in the present embodiment, the number of the adjusting elements 143 is, for example, three, but not limited thereto, and other arrangement numbers may also be applicable, and the adjusting elements 143 are made of an inelastic or low-elasticity material.

Referring to fig. 10A and 10B, the caliber of the collar 142 is adapted to the caliber of the urine inlet 113 of the outer sheath 11, so that the collar 142 is sleeved on the urine inlet 113 of the outer sheath 11, the balloon adjusting device 141 is fixedly disposed at the distal end of the outer sheath 11, and the adjusting element 143 is located outside the outer wall of the outer sheath 11 and extends from the first end 121 of the balloon 12 to the second end 122 of the balloon 12, so that the balloon 12 is clamped between the outer wall of the outer sheath 11 and the adjusting element 143 of the balloon adjusting device 141, thereby adjusting the expansion state of the balloon 12 in the expansion state. In the present embodiment, the balloon 12 can be made to assume the shape of a three-petal balloon with different shapes as shown in fig. 11A and 11B by the balloon adjusting device 141. It should be noted that the expanded configuration of the balloon 12 is not limited thereto, and the shape of the adjusting members 143 and/or the number of the adjusting members 143 may be changed to make the balloon 12 assume different expanded configurations, such as a multilobe balloon.

It should be noted that the expansion of the three-flap balloon or the multi-flap balloon can be realized by the band 140.

With continued reference to fig. 12A-12C, in another embodiment, the balloon adjustment unit 14 of the present application may also be, for example, a balloon outer sheath 144, which is made of non-elastic material or low-elastic material, and a plurality of openings 145 (in this embodiment, three openings 145) are formed in the circumferential direction of the balloon exterior member 144, and the openings 145 are separated by a rib portion 146, wherein the balloon outer member 144 can be disposed outside the balloon 12, and can partially protrude from the opening 145 when the balloon 12 is in the inflated state, and the ribs 146 form grooves on the outer surface of the balloon 12, thereby achieving the purpose of adjusting the expansion shape of the balloon 12, and residual urine in the bladder is guided from the first end 121 of the balloon 12 to the second end 122 of the balloon 12 by the formed grooves, and flows into the liquid discharge port 115 located near the second end 122 to be discharged outside the patient's body via the core passage 112 in the sheath tube 11. Compared with other embodiments, the balloon adjusting unit 14 of the present embodiment provides better adjustment of the expanded shape of the balloon.

In addition, a plurality of drainage openings 147 may be formed in the circumferential direction of the balloon outer sheath 144, in this embodiment, the positions of the drainage openings 147 and the openings 145 are staggered from each other and axially aligned with the positions of the ribs 146, so that the positions of the drainage openings 147 may correspond to the positions of the grooves formed on the balloon 12, and meanwhile, when the balloon outer sheath 144 is sleeved outside the balloon 12, the positions of the drainage openings 147 also overlap with the positions of the drainage ports 115 on the outer sheath tube 11, so that the drainage openings 147 of the balloon outer sheath 144 and the drainage ports 115 of the outer sheath tube 11 form a passage, thereby facilitating the residual urine guided to the second end 122 of the balloon 12 by the grooves on the surface of the balloon 12 to flow into the inner core passage 112 through the passage formed by the drainage openings 147 and the drainage ports 115 and to be discharged outside the patient.

It should be noted that the arrangement of the drainage opening 147 on the balloon outer member 144 is not necessary, that is, the residual urine guided to the second end 122 of the balloon 12 by the balloon outer member 144 can directly enter the drainage port 115 of the outer sheath tube 11 and flow into the inner core passage 112.

Further, referring to fig. 13, in a preferred embodiment, drainage port 115 located near second end 122 of balloon 12 may be disposed at a position corresponding to the formation of grooves on balloon 12, so that residual urine guided to second end 122 of balloon 12 by the grooves may be drained through drainage port 115.

To sum up, the structure of the urethral catheterization product of the application can lead the inner core with the guide end to penetrate through the outer sheath tube through the structural design of the detachable inner core and the outer sheath tube when the urethral catheterization product is installed, so that the distal end of the outer sheath tube is guided to pass through the urethra of a patient and enter the bladder by means of the guide end exposed out of the outer sheath tube, and after the installation is completed, the inner core can be detached from the outer sheath tube to expose the blunt-head-shaped urine inlet, and the inner part of the outer sheath tube after the inner core is detached can naturally form the urethral catheterization passage, so that the urine in the bladder can flow into the urethral passage through the exposed urine inlet and be discharged.

In addition, the thin film inner core passage is formed on the outer sheath tube and is arranged in the urethra of a patient, so that the stimulation to the urethral mucosa can be greatly reduced, and meanwhile, the air injection passage in the outer sheath tube is used for providing support for the thin film inner core passage, so that the purpose of preventing the thin film inner core passage from being twisted or bent in the urethra is achieved on the premise of not increasing additional components, and the thin film inner core passage is ensured to be kept smooth in the using process.

Furthermore, by means of the design of the balloon adjusting unit and the liquid outlet, the urine residue of the bladder in an empty state can be reduced, so that the urinary tract irritation symptom of a patient with an indwelling catheter is improved, and the incidence rate of urinary tract infection is reduced.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A urinary catheterization product structure, comprising:

the far end of the outer sheath tube is also provided with a urine inlet communicated with the inner core passage, the urine inlet is a blunt opening, and the near end of the outer sheath tube is provided with a urine discharge port communicated with the inner core passage;

a balloon disposed at the distal end of the outer sheath and communicating with the gas injection passage, wherein the balloon is inflated by injecting gas through the gas injection passage or deflated by exhausting gas through the gas injection passage; and

the inner core is detachably arranged in the inner core passage of the outer sheath tube in a penetrating way and is provided with a guide end;

when the inner core is arranged in the inner core passage in a penetrating way, the guide end passes through the urine inlet to extend out of the inner core passage and expose out of the outer sheath tube, and when the inner core is detached from the inner core passage, the urine inlet is exposed out, so that the urine inlet, the inner core passage and the urine outlet form a hollow passage; wherein,

in an initial state, the balloon is in the contracted state, the inner core is arranged in the inner core passage in a penetrating manner, so that the distal end of the outer sheath tube is guided to enter the bladder through the urethra of the patient by virtue of the guide end of the inner core exposed out of the outer sheath tube, the balloon is arranged in the bladder, the balloon is inflated by virtue of the inflation passage so as to be positioned in the bladder in the expanded state, and the inner core is detached from the inner core passage, so that the urine inlet, the inner core passage and the urine discharge port form a passage, and the urine in the bladder passes through the urine inlet and is discharged through the inner core passage and the urine discharge port.

2. The urinary catheter product structure of claim 1, wherein the balloon, when in the inflated state, completely covers the urinary inlet to avoid direct contact of the urinary inlet with the bladder.

3. The urinary catheter product structure of claim 1, wherein the side wall of the gas injection passage is fitted or partially contacted with the side wall of the inner core passage along an axial portion of the outer sheath tube, or the gas injection passage is formed in the side wall of the inner core passage.

4. The urinary catheterization product structure of claim 3, wherein the core passageway comprises a membrane core passageway and a hose core passageway, and wherein the membrane core passageway is disposed in the patient's urethra, the insufflation passageway being configured to provide support to the membrane core passageway to prevent the membrane core passageway from twisting or bending to maintain patency.

5. The hose of claim 4, wherein the membrane core passage and the hose core passage are made of the same material or different materials, and the membrane core passage and the hose core passage are connected to each other through a thermal melting, bonding, cladding, sewing, welding process, or the membrane core passage and the hose core passage are integrally formed.

6. The urinary catheter product structure of claim 1, wherein the outer sidewall of the inner core is adapted to the inner sidewall of the inner core passage.

7. The urinary catheter product structure of claim 1, further comprising a balloon adjustment unit disposed on the sheath or on the balloon for adjusting the expanded configuration of the balloon in the inflated state.

8. The urinary catheter product structure of claim 7, wherein the balloon includes a first end near the distal end of the sheath and a second end far from the distal end of the sheath, and the balloon adjusting unit is configured to form a groove on the outer surface of the balloon when the balloon is in the inflated state, the groove extending from the first end of the balloon to the second end of the balloon, so as to guide the residual urine in the bladder from the first end of the balloon to the second end of the balloon via the groove.

9. The catheter product structure of claim 7, wherein the balloon includes a first end proximate to the distal end of the sheath and a second end distal to the distal end of the sheath, the balloon adjustment unit being configured to cause the balloon to assume a non-regular symmetrical balloon cross-sectional shape when in the inflated state to direct residual urine within the bladder from the first end of the balloon to the second end of the balloon.

10. The urinary catheter product structure of claim 8 or 9, wherein the sheath tube further has a liquid outlet connected to the core passage and disposed at the second end of the balloon, so that the residual urine guided to the second end of the balloon flows into the liquid outlet and is discharged through the core passage.