CN119770836A - A new type of bladder instillation device - Google Patents
A new type of bladder instillation device Download PDFInfo
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- CN119770836A CN119770836A CN202510100990.4A CN202510100990A CN119770836A CN 119770836 A CN119770836 A CN 119770836A CN 202510100990 A CN202510100990 A CN 202510100990A CN 119770836 A CN119770836 A CN 119770836A
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Abstract
本发明涉及医疗器械技术领域，尤其涉及一种新型膀胱灌注装置，包括：灌注导尿管、注射器、第一连接部和第二连接部，所述注射器包括抽药针，与所述抽药针可拆卸连接的注射针筒、可插拔设于所述注射针筒中的活塞和设置在所述注射针筒前端上的接口模块,所述接口模块采用具有一定伸缩性和柔韧性的柔性硅胶材料制成，以确保与抽药针或导尿管末端连接紧密，所述接口模块外壁设有锁定环；所述第一连接部设于所述抽药针的针管内壁上并与所述锁定环可拆卸配合，以实现针管与接口模块的无缝连接；所述第二连接部设于所述灌注导尿管的管体的接口端内壁上并与所述锁定环可拆卸配合，以实现所述灌注导尿管与所述接口模块的无缝连接。
The present invention relates to the technical field of medical devices, and in particular to a novel bladder infusion device, comprising: an infusion catheter, a syringe, a first connecting part and a second connecting part, wherein the syringe comprises a medicine withdrawal needle, an injection syringe detachably connected to the medicine withdrawal needle, a piston pluggable in the injection syringe and an interface module arranged on the front end of the injection syringe, wherein the interface module is made of a flexible silicone material with certain elasticity and flexibility to ensure a tight connection with the medicine withdrawal needle or the end of the catheter, and a locking ring is arranged on the outer wall of the interface module; the first connecting part is arranged on the inner wall of the needle tube of the medicine withdrawal needle and detachably cooperates with the locking ring to achieve a seamless connection between the needle tube and the interface module; the second connecting part is arranged on the inner wall of the interface end of the tube body of the infusion catheter and detachably cooperates with the locking ring to achieve a seamless connection between the infusion catheter and the interface module.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and particularly relates to a novel bladder perfusion device.
Background
Bladder cancer is one of the most common malignant tumors in the urinary system, with a high incidence especially in the elderly population. For patients with non-myogenic invasive bladder cancer, bladder perfusion treatment is a common and effective treatment after bladder cancer surgery. The medicine is directly injected into the bladder through the catheter, so that the tumor remained after operation can be killed, the tumor recurrence can be prevented, and the toxic and side effects of the whole body are small. The success or failure of bladder perfusion treatment depends largely on the design and use of the perfusion device.
Currently, bladder irrigation devices include standard double lumen catheters (F16), 50ml syringes and needles and bladder irrigators. However, these tools have some significant drawbacks in practical use. One of the most important problems is the mismatch of the catheter tip aperture and the syringe diameter, which makes it necessary for medical staff to transfer the medical fluid into the bladder irrigator before the infusion, which not only increases the complexity of the operation, but also may lead to instability of the interface, risk of drug leakage, and influence the infusion treatment operation. Specifically, currently, common bladder irrigation devices on the market typically employ a standard dual lumen catheter (F16), a 50ml syringe and a bladder irrigator in combination. The catheter is usually made of medical silica gel or latex materials, has certain flexibility and is convenient to insert into the bladder of a patient. However, the distal bore design of such catheters often does not match the exit diameter of standard syringes perfectly, resulting in the transfer of the medical fluid into the bladder irrigator prior to use to ensure a smooth connection. The adjustment is usually performed by a medical staff sucking the liquid medicine through a 50ml syringe, transferring the liquid medicine into a bladder irrigator, connecting a catheter, and injecting the liquid medicine into the bladder of the patient.
In summary, the prior bladder irrigation device has the following disadvantages:
The interface matching performance is poor, namely the diameter of the tail end of the current catheter is not matched with that of a standard injector, medical staff is required to absorb the liquid medicine in the ampoule bottle by using a 50m injector when dispensing, the liquid medicine is transferred to a bladder irrigator (generally 70 ml), the catheter is connected through the bladder irrigator, and the catheter is inserted into the bladder of a patient, so that medicine injection is completed. Such an operation is cumbersome and time-consuming, increasing the complexity of the clinical procedure.
The connection is unstable, namely the bladder irrigator and the tail end of the catheter are not in natural anastomosis, and the outlet of the bladder irrigator is fixed by virtue of the elastic relaxation of the tail end of the catheter. In the process of injecting the medicine into the bladder, the speed is faster or the connection is not tight, and the interface between the catheter and the bladder irrigator is easy to loose or fall off, so that the medicine is leaked, and the perfusion operation and the treatment effect are affected. The treatment area can be polluted, even the medical staff and the patient are damaged, potential safety hazards exist, and the medical cost is increased.
The patient experience is poor, the operation process is complex, the connection is unstable, the operation time is prolonged, pollution is easy to cause, urinary tract infection of the patient is caused, and the treatment tolerance and satisfaction are reduced.
The operation technology has strong dependence, the prior art scheme has higher requirements on experience and skills of operators, and the difference of operation levels of different operators can cause the difference of pouring efficiency and effect, thereby increasing the subjectivity and uncertainty of operation.
The 201820856724.X discloses a disposable silica gel catheter special for bladder perfusion, which comprises a catheter body, wherein the upper end of the catheter body comprises a perfusion inlet, a connector at the front end of the catheter is designed into a luer conical connector, a fixing wing, a length scale and a diameter mark are arranged below the catheter body, the lower end of the catheter body is designed into a drug outlet side outlet hole and a straight outlet hole, the wall of the lower end of the catheter body is a blunt end which is designed from outside to inside obliquely, the scale mark 7 can prompt the introduction depth when the device is implemented, the diameter of the catheter is thinner, the hardness of the catheter is satisfied to be inserted into the bladder, the blunt design of the head end can avoid excessively stimulating the urethra in the catheterization process, the scale mark can avoid excessively long insertion, and the setting of the fixing wing is beneficial to the imbedding and fixing of the catheter. It can be seen from the figure that it is difficult to tightly connect the infusion inlet head of the front end of the infusion catheter to the syringe.
A bladder perfusion apparatus is disclosed in 202410071818.6 by a second affiliated hospital of the Chinese civil liberation army medical university, and comprises an injector, a sealing connecting piece and a catheter, wherein the injector comprises an injection needle cylinder, a piston and an empty needle nipple arranged on one end of the injection needle cylinder, and the outlet end of the catheter is sleeved on the empty needle nipple. The sealing connecting piece comprises an upper pressing needle cylinder sleeve and a lower pressing needle cylinder sleeve, the upper pressing needle cylinder sleeve and the lower pressing needle cylinder sleeve are semicircular sleeves, one end of each semicircular sleeve is provided with a semicircular baffle, an upper pressing catheter sleeve is arranged on the semicircular baffle at one end of each upper pressing needle cylinder sleeve and is deviated from the center, a lower pressing catheter sleeve is arranged on the semicircular baffle 23 at one end of each lower pressing needle cylinder sleeve, the lengths of the upper pressing catheter sleeve and the lower pressing catheter sleeve are both larger than those of an empty needle nipple, one sides of the upper pressing needle cylinder sleeve and one side of the lower pressing needle cylinder sleeve are connected in a hinge mode, when the sealing connecting piece is used, the outlet end of a catheter is sleeved on the empty needle nipple and placed on the lower pressing catheter sleeve, and then the upper pressing needle cylinder sleeve and the lower pressing catheter sleeve are buckled on an injection needle cylinder, so that the catheter is completely attached and sealed with the empty needle nipple, and the overflow of chemotherapeutic medicine from a joint is effectively avoided, and the accurate dosage of the drug is ensured to enter the bladder.
As can be seen from the above, the existing bladder perfusion device needs to be provided with a medicine suction channel and a perfusion channel respectively, so that a plurality of joints are required to be designed, and loosening or falling off easily occurs between the joints, so that medicine leakage is caused, and bladder perfusion operation is affected.
Disclosure of Invention
The technical proposal of the invention aims to provide a novel bladder perfusion device, which comprises a perfusion catheter, an injector, a first connecting part and a second connecting part,
The injector comprises a medicine drawing needle, an injection needle cylinder detachably connected with the medicine drawing needle, a piston which can be inserted and pulled out of the injection needle cylinder, and an interface module arranged on the front end of the injection needle cylinder, wherein the interface module is made of flexible silica gel materials with certain elasticity and flexibility so as to ensure tight connection with the end of the medicine drawing needle or a catheter, and a locking ring is arranged on the outer wall of the interface module;
the first connecting part is arranged on the inner wall of the needle tube of the medicine drawing needle and is detachably matched with the locking ring so as to realize seamless connection between the needle tube and the interface module;
the second connecting part is arranged on the inner wall of the interface end of the catheter body of the perfusion catheter and is detachably matched with the locking ring so as to realize seamless connection between the perfusion catheter and the interface module;
The device is switched between a medicine drawing mode and a perfusion mode;
the medicine drawing mode is that the first connecting part of the medicine drawing needle is matched with a locking ring on the outer wall of the interface module, a needle tube of the medicine drawing needle is fixedly sleeved on the outer wall of the interface module on the front end of the injection needle cylinder, and injection liquid medicine is drawn into the injection needle cylinder of the injector from the medicine drawing needle through piston movement and then the first connecting part is disassembled;
And in the filling mode, the second connecting part of the filling catheter is matched with the locking ring on the outer wall of the interface module, the interface end of the filling catheter is fixedly sleeved on the outer wall of the interface module on the front end of the injection syringe, and injection liquid medicine is guided into the filling catheter and then enters a target to be filled through the movement of the piston. The needle cylinder, the interface module and the perfusion catheter form a perfusion channel;
the medicine sucking channel and the pouring channel are arranged coaxially.
The locking ring comprises a plurality of protruding structures which are annularly arranged on the outer wall of the interface module, the protruding structures comprise limiting plates connected with the outer wall of the interface module, and one ends of the limiting plates, which are not connected with the interface module, extend towards the direction of the injection syringe to form arc-shaped fixing plates.
Further, the first connecting portion/the second connecting portion is a plurality of hollow grooves formed in the inner wall of the joint end of the catheter body of the drug drawing needle/the perfusion catheter in a surrounding mode, the cross section shape of each hollow groove is matched with that of the locking ring, the maximum arc length of each hollow groove is longer than at least twice that of the limiting plate, and two adjacent hollow grooves are not connected in a penetrating mode.
Further, the end of the same side of each hollow groove extends to the end face of the interface end to form a guide groove for the locking ring to enter, and the shape and the size of the guide groove are matched with those of the limiting plate.
Further, the locking ring is made of a high strength polymer material, and the tightness of the interface can be adjusted by rotation.
Further, the protruding structure of the locking ring is clamped and fixed at one end, far away from the guide groove, of the hollow groove and keeps the clamping state of the protruding structure, the protruding structure is in a locking state, and the protruding structure is rotated out of the hollow groove towards one end of the guide groove and pulled out of the hollow groove to be in an unlocking state.
Further, the first connecting part and the medicine drawing needle are integrally formed.
Further, the second connecting part is integrally formed with the catheter body of the perfusion catheter.
Further, the perfusion catheter adopts a single-cavity catheter.
Further, the diameter of the inner cavity of the input section of the perfusion catheter is smaller than that of the inner cavity of the output end of the perfusion catheter.
Further, a one-way valve for resisting reverse flow is arranged on one side, close to the input section, of the inner cavity of the input end of the perfusion catheter.
Compared with the prior bladder perfusion technology,
1. The novel bladder perfusion device has remarkable advantages in aspects of interface matching and connection stability. In the prior art, the common 50ml syringe is used for preparing the liquid medicine and then is transferred into the bladder irrigator, and then the common catheter is connected, so that the operation complexity is increased, the interface connection is unstable, and the risks of falling off and medicine leakage exist. The interface module at the front end of the injection needle cylinder is made of flexible silica gel, so that the seamless connection between the catheter and the injector is realized, the firmness of the interface is further enhanced through the adjustable locking ring, and the safety and the efficiency in the injection process are obviously improved.
2. During bladder perfusion, the stability of the interface is critical to ensure that the procedure proceeds smoothly. Therefore, the adjustable locking ring is designed at the interface, and the connection between the catheter and the injector can be further fixed by rotating the locking ring, so that the interface is prevented from loosening or falling off in the pouring process. The design can enhance the stability of connection, directly improve the safety and efficiency of bladder perfusion operation, and promote the treatment experience of patients.
After the locking ring is used, the connection firmness of the syringe and the catheter is obviously improved, and the extraction force (the capability of the connection interface to keep stable when the connection interface is subjected to external force) is improved compared with the traditional method.
3. The inner cavity diameter of the input section of the perfusion catheter in the novel bladder perfusion device is smaller than the inner cavity diameter of the output end at the tail end in the bladder, the inner diameter of the input section is made to be thin so as to avoid too fast perfusion, the residues of medicines in a thick pipeline are reduced, the loss of effective therapeutic medicine dosage is avoided, in addition, the design of the inner cavity diameter of the output end is larger than that of the input section, the impact of thin medicine water column on the bladder wall can be effectively avoided, and the uncomfortable feeling of a patient is reduced.
4. The inner cavity of the input end of the perfusion catheter is provided with the anti-reflux one-way valve, so that residual urine overflows along the catheter due to various reasons such as tension of the patient and involuntary contraction of the bladder after the catheter is placed in the patient, the inner cavity of the catheter and the surrounding environment are blocked, and infection of the patient is avoided.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is an exploded view of a novel bladder irrigation device according to the present invention;
FIG. 2 is a schematic view of the structure of a first connecting part/a second connecting part in the novel bladder irrigation device according to the present invention, (a) is a schematic view of an end face, and (b) is a perspective view from the end face direction;
FIG. 3 is a schematic view showing the connection of the first/second connection portions of the novel bladder irrigation device with the locking ring;
FIG. 4 is a flow chart illustrating the operation of a novel bladder irrigation device according to the present invention;
FIG. 5 is a schematic view of a syringe-opened check valve of a novel bladder irrigation device of the present invention;
fig. 6 is a detail of the output end of the perfusion catheter at reference a in fig. 1.
Reference numerals
1, Pouring a catheter;
2, a syringe;
21, a medicine drawing needle, 22, an injection syringe, 23, a piston and 24, an interface module;
3, a first connecting part;
4, a second connecting part;
5, locking ring;
51, a limiting plate, 52, a fixing plate;
6, a guide groove;
7, a one-way valve;
and 8, cutting the sleeve.
Detailed Description
The novel bladder perfusion device according to the present invention will be described in further detail with reference to the accompanying drawings and specific examples. Advantages and features of the invention will become more apparent from the following description and from the claims.
In the prior art, the diameter of the tail end of the catheter is not matched with that of the interface of the 50ml syringe, so that the therapeutic liquid needs to be transferred into the bladder irrigator to realize connection, and the connection is not firm. According to the invention, the interface is made of the flexible silica gel material, so that the connecting device with elasticity and adaptability is designed, and the seamless connection between the catheter and the injector is realized, so that the method is simple, convenient and feasible. The design directly solves the problem of poor interface matching in the prior art, and is a primary innovation point of the invention.
The bladder perfusion method is to insert the catheter into the bladder of the patient, and then to inject the liquid medicine into the bladder of the patient through the catheter, which is generally applicable to the postoperative treatment of bladder tumor. In general, if a patient suffers from a bladder tumor, after a first electroincision operation, bladder perfusion chemotherapy or perfusion immunotherapy is followed, and common chemotherapeutic drugs include doxorubicin, epirubicin, gemcitabine, etc., and bcg is commonly used as an immunotherapy drug. When the bladder is perfused, the patient empties in advance, then inserts the catheter used for perfusion into the bladder, then directly injects diluted therapeutic drugs into the bladder of the patient through the catheter, pulls out the catheter, and orders the patient to hold down urine. And after the operation is finished, the patient is ordered to change the body position timely so that the liquid medicine can fully contact each wall of the bladder, and the liquid medicine is discharged after half an hour to two hours.
The invention provides a novel bladder perfusion device which comprises a perfusion catheter 1, a syringe 2, a first connecting part 3 and a second connecting part 4,
The injector 2 comprises a medicine drawing needle 21, an injection needle cylinder 22 detachably connected with the medicine drawing needle 21, a piston 23 which is arranged in the injection needle cylinder 22 in a pluggable manner, and an interface module 24 which is arranged on the front end of the injection needle cylinder 22, wherein the interface module 24 is made of flexible silica gel materials with certain elasticity and flexibility, and a locking ring 5 is arranged on the outer wall of the interface module 24;
the first connecting part 3 is arranged on the inner wall of the needle tube of the medicine drawing needle 21 and is detachably matched with the locking ring 5 so as to realize seamless connection between the needle tube and the interface module 24;
the second connecting part 4 is arranged on the inner wall of the interface end of the tube body of the perfusion catheter 1 and is detachably matched with the locking ring 5 so as to realize seamless connection between the perfusion catheter 1 and the interface module 24;
The device is switched between a medicine drawing mode and a perfusion mode;
The medicine drawing mode is that the first connecting part 3 of the medicine drawing needle 21 is matched with the locking ring 5 on the outer wall of the interface module 24, the needle tube of the medicine drawing needle 21 is tightly sleeved on the outer wall of the interface module 24 on the front end of the injection needle cylinder 22, and injection medicine liquid is drawn into the injection needle cylinder 22 of the injector 2 from the medicine drawing needle 21 through piston movement and then the first connecting part 3 is disassembled;
A filling mode, wherein the second connecting part 4 of the filling catheter 1 is matched with the locking ring 5 on the outer wall of the interface module 24, the interface end of the filling catheter 1 is fixedly sleeved on the outer wall of the interface module 24 on the front end of the injection needle cylinder 22, injection liquid medicine is introduced into the filling catheter 1 through piston movement, the catheter 1 is pulled out, and the needle cylinder, the interface module 24 and the filling catheter 1 form a filling channel;
the medicine sucking channel and the pouring channel are arranged coaxially.
The material selection and structural design of the flexible silica gel interface are a great innovation of the invention. The interface design of the invention adopts a silica gel material with elasticity and flexibility, and an annular bulge structure is designed in the interface so as to ensure close matching with the tail end of the catheter and the needle head. The design not only solves the problem of poor interface matching in the prior art, but also improves the stability of connection, and has important innovation and practical value.
Specifically, the interface module 24 has a cylindrical structure matching with the inner cavity of the perfusion catheter 1, the locking ring 5 comprises a plurality of protruding structures annularly arranged on the outer wall of the interface module 24, the protruding structures comprise limiting plates 51 connected with the outer wall of the interface module 24, and one ends of the limiting plates 51, which are not connected with the interface module 24, extend towards the direction of the injection syringe 22 to form an arc-shaped fixing plate 52.
Specifically, the first connection portion 3/the second connection portion 4 is a plurality of hollow grooves formed on the inner wall of the interface end of the catheter body of the drug-drawing needle 21/the perfusion catheter 1 in a surrounding manner, the cross section shape of each hollow groove is matched with that of the locking ring 5, the maximum arc length of each hollow groove is longer than at least twice the maximum arc length of the limiting plate 51, and two adjacent hollow grooves are not connected in a penetrating manner.
Specifically, the end of the same side of each hollow groove extends to the end face of the interface end to form a guide groove 6 for the locking ring 5 to enter, and the shape and the size of the guide groove 6 are matched with those of the limiting plate 51.
In a specific embodiment, in order to facilitate understanding, the axis of the interface module 24 is referred to as a first axis, as shown in fig. 1-2, the limiting plates 51 in the plurality of protruding structures are located on the same plane (the plane is parallel to the end surface of the drug outlet end of the interface module 24) and are disposed around the periphery of the interface module 24, the distances D from any point on the arc surface of the limiting plates 51, which is not connected with the interface module 24, to the first axis are equal, the arc-shaped fixing plates 52 are connected with the limiting plates 51, the distances D from any point on the outer wall of the arc-shaped fixing plates 52 to the first axis are all equal, and the distances L from any point on the inner wall of the arc-shaped fixing plates 52 are all equal.
In the same way, the inner wall of the interface end of the catheter body of the drug-drawing needle 21/the infusion catheter 1 is provided with a hollow groove matched with the locking ring 5, and two hollow grooves are drawn in the figure 2 of the application as illustration, but not limited to two, the number of the hollow grooves is matched with the number of the convex structures, and in order to realize the rotation clamping as long as possible, for example, the maximum arc length of a single hollow groove is longer than the maximum arc length of the limiting plate 51 by at least twice, and in order to realize the rotation to the head to generate the limit, the two adjacent hollow grooves are not connected in a penetrating way.
In order to insert the interface module 24 into the inner cavity of the interface end of the catheter body of the drug-drawing needle 21/the infusion catheter 1, the end of the same side of each hollow groove extends to the end surface of the interface end to form a guide groove 6 for the locking ring 5 to enter, the shape and the size of the guide groove 6 are matched with those of the limiting plate 51, and the limiting plate 51 on the interface module 24 is aligned with the guide groove 6 and then inserted and rotated to realize the clamping connection.
In particular, the locking ring 5 is made of a high-strength polymer material, the tightness of the interface being adjustable by rotation.
Specifically, the protruding structure of the locking ring 5 is fastened at one end of the hollow groove far away from the guiding groove 6 and keeps the fastening state, and is in a locking state, and the protruding structure is rotated out of the hollow groove towards one end of the guiding groove 6 and pulled out of the hollow groove to be in an unlocking state.
Specifically, the first connecting portion 3 is integrally formed with the drug delivery needle 21.
Specifically, the second connecting portion 4 and the body of the infusion catheter 1 are integrally formed, as shown in fig. 6, three output ports (the oval shown by the dotted line is the output port arranged on the back) are uniformly and annularly arranged at the output end of the infusion catheter, that is, the included angle between the center line of any two adjacent output ports and the center line of the infusion catheter is 120 °.
In particular, the perfusion catheter 1 is a single lumen catheter.
In an example, other materials with good biocompatibility and elasticity characteristics, such as thermoplastic elastomer (TPE), polyurethane (PU), etc., may be used to fabricate interface module 24 in addition to flexible silicone. These materials also provide sufficient stretchability and flexibility to achieve a seamless connection.
Instead of the fixation of the locking ring 5, other mechanical fixation means may be used, such as a snap-in, snap-in locking mechanism, or even an adjustable screw connector. These alternatives also ensure a secure connection of the catheter to the syringe 2, preventing loosening or falling out during the filling process.
Besides the annular bulge structure, the outer part of the interface module 24 can be designed into a multi-section gradual change type structure or a trapezoid embedded groove, and the friction force and the tightness of the perfusion catheter 1 and the interface module 24 are enhanced by utilizing the designs of different shapes, so that the stability of connection is ensured.
In particular, the diameter of the lumen of the input section of the perfusion catheter 1 (the middle section of the perfusion catheter for liquid delivery) is smaller than the diameter of the lumen of the output end of the perfusion catheter (the end located in the bladder).
Specifically, a one-way valve 7 for resisting countercurrent is disposed on a side of the inner cavity of the input end of the infusion catheter 1, which is close to the input section (the end connected with the syringe 2), before the syringe 2 is inserted into the input end of the infusion catheter 1, the inner channel is isolated from the outside, after the syringe 2 is inserted into the input end of the infusion catheter 1, the one-way valve 7 is opened unidirectionally towards the inner cavity of the infusion catheter 1, in a specific implementation, in order to ensure the connection stability of the syringe 2 and the infusion catheter 1, the C-shaped cutting sleeve 8 can be wrapped and clamped on the outer wall of the input end of the infusion catheter 1 after the syringe 2 and the infusion catheter 1 are connected, so that further fixation (similar to a fastener style of a pressing pump) is realized.
The method of using the invention in combination with fig. 4 is as follows:
Step 1, when a medical staff prepares to perform bladder perfusion treatment on a patient with reduced drinking water before perfusion and bladder emptying in advance, firstly, a treatment liquid is prepared by using the syringe 2 and the needle head of the invention, and then the needle head is removed.
Step 2, selecting a perfusion catheter 1 with proper specification and inserting the perfusion catheter into the bladder of the patient.
Step 3, connecting the novel injector 2 of the invention with the perfusion catheter 1. By inserting the end of the perfusion catheter 1 into the interface of the syringe 2, the flexibility of the flexible silicone interface module 24 is used to ensure a seamless connection of the two. The locking ring 5 is then rotated to further secure the interface, ensuring the robustness of the connection.
And 4, slowly and uniformly injecting the therapeutic drug into the bladder.
And 5, after the pouring is finished, pulling out the catheter 1 together with the syringe 2.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is within the scope of the appended claims and their equivalents to fall within the scope of the invention.
Claims (11)
1. A novel bladder perfusion device is characterized by comprising a perfusion catheter, a syringe, a first connecting part and a second connecting part,
The injector comprises a medicine drawing needle, an injection needle cylinder detachably connected with the medicine drawing needle, a piston which can be inserted and pulled out of the injection needle cylinder, and an interface module arranged on the front end of the injection needle cylinder, wherein the interface module is made of flexible silica gel materials with certain elasticity and flexibility so as to ensure tight connection with the end of the medicine drawing needle or a catheter, and a locking ring is arranged on the outer wall of the interface module;
the first connecting part is arranged on the inner wall of the needle tube of the medicine drawing needle and is detachably matched with the locking ring so as to realize seamless connection between the needle tube and the interface module;
the second connecting part is arranged on the inner wall of the interface end of the catheter body of the perfusion catheter and is detachably matched with the locking ring so as to realize seamless connection between the perfusion catheter and the interface module;
The device is switched between a medicine drawing mode and a perfusion mode;
the medicine drawing mode is that the first connecting part of the medicine drawing needle is matched with a locking ring on the outer wall of the interface module, a needle tube of the medicine drawing needle is fixedly sleeved on the outer wall of the interface module on the front end of the injection needle cylinder, and injection liquid medicine is drawn into the injection needle cylinder of the injector from the medicine drawing needle through piston movement and then the first connecting part is disassembled;
And in the filling mode, the second connecting part of the filling catheter is matched with the locking ring on the outer wall of the interface module, the interface end of the filling catheter is fixedly sleeved on the outer wall of the interface module on the front end of the injection syringe, and injection liquid medicine is guided into the filling catheter and then enters a target to be filled through the movement of the piston. The needle cylinder, the interface module and the perfusion catheter form a perfusion channel;
the medicine sucking channel and the pouring channel are arranged coaxially.
2. The novel bladder irrigation device according to claim 1, wherein the interface module is in a cylindrical structure matched with the inner cavity of the irrigation catheter, the locking ring comprises a plurality of protruding structures which are annularly arranged on the outer wall of the interface module, the protruding structures comprise limiting plates connected with the outer wall of the interface module, and one ends of the limiting plates, which are not connected with the interface module, extend towards the direction of the injection syringe to form an arc-shaped fixing plate.
3. The novel bladder irrigation device according to claim 2, wherein the first connection portion/the second connection portion is a plurality of hollow grooves formed in the inner wall of the interface end of the drug drawing needle/the irrigation catheter in a surrounding mode, the cross-sectional shape of each hollow groove is matched with that of the locking ring, the maximum arc length of each hollow groove is longer than the maximum arc length of the limiting plate by at least two times, and two adjacent hollow grooves are not connected in a penetrating mode.
4. A novel bladder irrigation device according to claim 3, wherein the ends of the same side of each hollow groove extend towards the end face of the interface end to form a guide groove for the locking ring to enter, and the guide groove is matched with the limiting plate in shape and size.
5. The novel bladder irrigation device according to claim 3, wherein the locking ring is made of a high strength polymer material, and the tightness of the interface is adjustable by rotation.
6. The novel bladder irrigation device according to claim 4, wherein the protruding structure of the locking ring is fastened to one end of the hollow groove away from the guide groove and keeps a fastening state of the protruding structure in a locking state, and the protruding structure is rotated out of the hollow groove towards one end of the guide groove and pulled out of the hollow groove in an unlocking state.
7. The novel bladder irrigation device of claim 1, wherein the first connection portion is integrally formed with the withdrawal spike.
8. The novel bladder irrigation device of claim 1, wherein the second connection portion is integrally formed with the body of the irrigation catheter.
9. The novel bladder irrigation device of claim 1, wherein the irrigation catheter is a single lumen catheter.
10. The novel bladder irrigation device of claim 1, wherein the lumen diameter of the input section of the irrigation catheter is smaller than the lumen diameter of the output end of the irrigation catheter.
11. The novel bladder irrigation device according to claim 9, wherein a one-way valve is provided in the lumen of the input end of the irrigation catheter on a side thereof adjacent to the input section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510100990.4A CN119770836A (en) | 2025-01-22 | 2025-01-22 | A new type of bladder instillation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510100990.4A CN119770836A (en) | 2025-01-22 | 2025-01-22 | A new type of bladder instillation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119770836A true CN119770836A (en) | 2025-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202510100990.4A Pending CN119770836A (en) | 2025-01-22 | 2025-01-22 | A new type of bladder instillation device |
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| CN (1) | CN119770836A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM281641U (en) * | 2005-05-26 | 2005-12-01 | Hung-Chi Huang | Syringe tube and syringe using the tube |
| CN205913637U (en) * | 2016-05-11 | 2017-02-01 | 中国人民解放军南京军区南京总医院 | Novel three cavity catheter bladders wash and medicine fills connector |
| CN209596289U (en) * | 2018-06-19 | 2019-11-08 | 中国人民解放军第一〇一医院 | A kind of irrigation of bladder flusher |
| CN210992046U (en) * | 2019-06-19 | 2020-07-14 | 四川大学华西第四医院 | Catheter assembly |
| CN211327487U (en) * | 2019-07-26 | 2020-08-25 | 王春云 | Improved injection needle tube |
| CN212880580U (en) * | 2020-04-29 | 2021-04-06 | 向仕钊 | An anti-reflux bladder irrigation catheter |
| CN215961426U (en) * | 2021-09-29 | 2022-03-08 | 杭州吉姆士医疗科技有限公司 | Adapter of catheter flushing injector |
| CN218980196U (en) * | 2022-08-02 | 2023-05-09 | 首都医科大学附属北京同仁医院 | Bladder perfusion bag |
| CN219001688U (en) * | 2022-10-14 | 2023-05-12 | 三六三医院 | Leak protection catheter |
| CN220877506U (en) * | 2023-08-09 | 2024-05-03 | 扬中美迪硅胶医用制品有限公司 | Leakage-proof three-cavity catheter |
-
2025
- 2025-01-22 CN CN202510100990.4A patent/CN119770836A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM281641U (en) * | 2005-05-26 | 2005-12-01 | Hung-Chi Huang | Syringe tube and syringe using the tube |
| CN205913637U (en) * | 2016-05-11 | 2017-02-01 | 中国人民解放军南京军区南京总医院 | Novel three cavity catheter bladders wash and medicine fills connector |
| CN209596289U (en) * | 2018-06-19 | 2019-11-08 | 中国人民解放军第一〇一医院 | A kind of irrigation of bladder flusher |
| CN210992046U (en) * | 2019-06-19 | 2020-07-14 | 四川大学华西第四医院 | Catheter assembly |
| CN211327487U (en) * | 2019-07-26 | 2020-08-25 | 王春云 | Improved injection needle tube |
| CN212880580U (en) * | 2020-04-29 | 2021-04-06 | 向仕钊 | An anti-reflux bladder irrigation catheter |
| CN215961426U (en) * | 2021-09-29 | 2022-03-08 | 杭州吉姆士医疗科技有限公司 | Adapter of catheter flushing injector |
| CN218980196U (en) * | 2022-08-02 | 2023-05-09 | 首都医科大学附属北京同仁医院 | Bladder perfusion bag |
| CN219001688U (en) * | 2022-10-14 | 2023-05-12 | 三六三医院 | Leak protection catheter |
| CN220877506U (en) * | 2023-08-09 | 2024-05-03 | 扬中美迪硅胶医用制品有限公司 | Leakage-proof three-cavity catheter |
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