Male urinary catheter with magnetic switch

Abstract

The invention discloses a male urinary catheter with a magnetic switch, comprising a urinary catheter body; a first cylinder with a through hole, which is made of a permanent magnetic material and is fixed in the channel of the urinary catheter body; a second cylinder with a through hole, which is made of a permanent magnetic material and is fixed in the channel of the urinary catheter body and has a certain distance from the first cylinder; a third cylinder, which is made of a permanent magnetic material or a magnetic material and is movably arranged between the first cylinder and the second cylinder; the third cylinder comprises a through hole and a sealing structure; wherein the sealing structure can block the through hole of the second cylinder; the first cylinder and the second cylinder can magnetically attract the third cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly to a male urinary catheter with a magnetic switch. Background Art

[0002] Male benign prostatic hyperplasia, prostate cancer, neurogenic bladder, overactive bladder and other urinary dysfunction diseases have a very high incidence rate among different races, and the risk of the above diseases is also increasing with age. These diseases directly lead to urination difficulties in patients, and a large amount of urine accumulates in the bladder, but cannot be discharged normally. At present, the more common way is to place a urinary catheter in the patient, the top of the urinary catheter is inserted into the patient's bladder, the tail end is retained outside the patient's body, and the tail end is connected to a urine bag. The urine bag can be fixed on the patient's calf during daytime activities. The disadvantages of this method are the severe discomfort of the patient's urethral external orifice and the difficulty of normal work and social activities with an external urine bag, as well as the inability to engage in sexual activities. The urinary catheter connects the internal and external environments of the body, which greatly increases the chance of urinary tract infection. Young people who need to work and socialize choose clean catheterization, that is, temporary catheterization by themselves when urinating. This solution requires multiple implantation and removal of temporary catheters every day, resulting in urethral mucosal damage and urethritis. Patients suffer from severe pain and develop severe psychological resistance. Even many of them suffer from varying degrees of depression, leading to social withdrawal. For patients with indwelling bladder tubes: 1. Patients who can undergo prostate surgery, this procedure can lead to loss of sexual function and decreased quality of life, and some patients resist it; 2. Patients who cannot undergo prostate surgery, the treatment option is cystostomy, with indwelling cystostomy tubes. The disadvantages of this option are that the tubes are easy to fall out (immediately go to the hospital for treatment) and carry a urine odor (the tubes and abdominal wall cannot be completely closed, and urine overflows). In summary, a urine control device that removes the external urine collection device and is not connected to the internal and external environment is urgently needed in clinical practice, and is also a hot research direction in the field of urine control in the world.

[0003] In view of the above problems, a new type of urinary catheter (urine control device) has emerged. The tail end of the urinary catheter is no longer located outside the patient's body, but inside the penis of the male patient. A switch is set in the urinary catheter, and urine is discharged by manually controlling the switch to open and close, so that the patient can move conveniently. Chinese patent application No. 201811485073, a male urinary catheter, discloses this technology, but this patented technology has the following technical difficulties in actual production: 1. A spring needs to be set. Since the core component of the device is F24, the outer diameter is about 8mm, and the maximum spring diameter is about 3mm, it is very difficult to process the spring that meets the technical requirements. The elastic coefficient must be kept stable for at least 28 days, the yield rate is extremely low and the stability is poor, making it difficult to use it as a medical device in clinical practice. (The salt components in urine will adhere to and precipitate on the surface of the implant, causing the spring coefficient to change. The most advanced coating technology cannot prevent the tiny device from precipitating salt components within a safe range during its use.) 2. The closed contact surface is closed with positive pressure. This method will cause the closed surface to be uneven due to the precipitation of salt components in urine, resulting in urine overflow during the storage period, and cannot provide patients with effective and satisfactory urine control needs. 3. The urine flow rate is low. Due to the sealing principle of the core urine control component, this technology has room for further improvement in urine flow rate and improves patient satisfaction during urination. 4. The balloon water injection fixation method is difficult to process and produce.

[0004] The present application aims to improve upon the above-mentioned shortcomings and provides an improved switch structure in a male urinary catheter, which ensures that the effectiveness of the core urine control component is improved while significantly improving the yield rate, greatly reducing production costs, and ensuring its working stability during its service life; it replaces the balloon water injection and fixing method to enable the technology to be produced and processed. Summary of the invention

[0005] The present invention designs and develops a male urinary catheter with a magnetic switch, which can reliably control the switch of the urinary catheter, has processability, and greatly improves stability and urine flow rate.

[0006] Another object of the present invention is to provide a method for expanding the top end of a urinary catheter in the bladder, wherein the expansion of the top end of the urinary catheter in the bladder is controlled by a pull line and a clamping block.

[0007] A male urinary catheter with a magnetic switch, comprising:

[0008] Catheter body;

[0009] A first cylinder with a through hole, which is made of permanent magnetic material and fixed in the channel of the catheter body;

[0010] A second cylinder with a through hole, which is made of permanent magnetic material and fixed in the channel of the catheter body and has a certain distance from the first cylinder;

[0011] A third cylinder, which is made of permanent magnetic material or magnetic material and is movably disposed in the channel of the catheter body between the first cylinder and the second cylinder; the third cylinder includes a through hole and a sealing structure;

[0012] Wherein, the sealing structure can block the through hole of the second cylinder; the first cylinder and the second cylinder can magnetically attract the third cylinder.

[0013] As a further preference, the end of the male urinary catheter is located in the urethra of the male penis; the first cylinder, the second cylinder and the third cylinder are close to the end of the male urinary catheter and are located in the urethra of the male penis.

[0014] As a further preference, the sealing structure comprises a spherical ball and a rib plate;

[0015] The rib plate is fixed in the through hole of the third cylinder to divide the through hole of the third cylinder into a plurality of channels;

[0016] The ball is fixedly supported on the rib plate and is located outside one end of the third cylinder, and can seal the through hole of the second cylinder.

[0017] As a further preference, the sealing structure comprises a central cylinder and ribs;

[0018] The third cylinder is a ring, the central cylinder is located at the center of the ring, and the rib plate connects the central cylinder and the inner wall of the ring;

[0019] The central cylinder can block the through hole of the second cylinder; the diameter of the through hole of the first cylinder is larger than the diameter of the central cylinder;

[0020] The diameter of the through hole of the first cylinder is larger than the diameter of the central cylinder.

[0021] As a further preference, it also includes:

[0022] The external driving device can input positive and negative currents to drive the movement of the third cylinder.

[0023] As a further preference, it also includes:

[0024] The top end of a urinary catheter made of elastic material comprises: a top flap extending axially along the urinary catheter body and a plurality of side flaps that can be radially expanded along the urinary catheter body; the top flap and the plurality of side flaps are connected at their roots; when not subject to external force, the plurality of side flaps lean against the urinary catheter body and are in a retracted state; when the top flap is subject to tension, the plurality of side flaps can be radially expanded along the urinary catheter body and are in an expanded state.

[0025] As a further preference, it also includes:

[0026] A pull wire, one end of which is connected to the top flap, and the other end of which extends out of the male urinary catheter; the first part of the pull wire extends in the central hole of the urinary catheter body, the second part of the pull wire enters into the tube wall of the urinary catheter body when the control switch area is formed corresponding to the first cylinder, the second cylinder and the third cylinder, and the third part of the pull wire enters into the central hole of the urinary catheter body again after passing through the control switch area.

[0027] The tube wall of the catheter body has a channel formed by a first hole and a second hole in the area corresponding to the control switch, the pull wire enters from the first hole, and extends from the second hole.

[0028] As a further preference, it also includes:

[0029] A clamping block, comprising a cone and a circular protrusion, wherein the circular protrusion is fixed on the bottom surface of the cone; two ends of the clamping block are respectively connected to the pull wire, the tip of the cone is connected to the pull wire, and the circular protrusion is connected to the pull wire;

[0030] When the plurality of side petals are in a folded state, the block is located in the channel, and the tip of the cone faces the second hole;

[0031] When the multiple side petals are in the expanded state, the block is in the central hole, the diameter of the circular protrusion is larger than the diameter of the second hole, and the circular protrusion seals the second hole; the block is stuck outside the second hole and remains motionless.

[0032] As a further preference, it also includes:

[0033] A connecting rod having a central through hole and a permanent magnet at one end thereof;

[0034] The end surface of the male urinary catheter is provided with a plurality of round blocks of magnetic material;

[0035] The permanent magnet on the connecting rod can absorb the round block on the end surface of the male urinary catheter.

[0036] The beneficial effects of the present invention are:

[0037] The technical solution of the present application overcomes the defect of the spring in the male urinary catheter in the prior art that is difficult to process. The magnetic solution is adopted, which is easy to process, and at the same time ensures reliable control and long service life. The technical solution of the present application effectively improves the structure that cannot be produced and the structure with poor stability in the prior art. The yield rate is greatly improved, the production cost is reduced, and the effectiveness and stability during its service life are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is an overall schematic diagram of the male urinary catheter of the present invention when the top end is not unfolded.

[0039] Figure 2 It is an overall schematic diagram of the top end of the male urinary catheter of the present invention being unfolded.

[0040] Figure 3 It is an overall perspective schematic diagram of the top end of the male urinary catheter of the present invention (the magnetic switch part is fully shown).

[0041] Figure 4 It is a perspective schematic diagram of the entire male urinary catheter of the present invention when the top end is not unfolded (the magnetic switch part is fully shown).

[0042] Figure 5 It is a schematic diagram of the end portion of the male urinary catheter of the present invention.

[0043] Figure 6 It is a perspective schematic diagram of the tube wall portion corresponding to the magnetic switch portion of the male urinary catheter of the present invention.

[0044] Figure 7 It is a schematic diagram of the position of the block when the top end of the male urinary catheter of the present invention is not unfolded.

[0045] Figure 8 It is a schematic diagram of the block structure when the top end of the male urinary catheter of the present invention is not unfolded.

[0046] Fig. 9 It is a schematic diagram of the position of the block when the top end of the male urinary catheter of the present invention is unfolded.

[0047] Fig.10 The figure is a schematic diagram of the position of the magnetic switch of the male urinary catheter of the present invention.

[0048] Fig.11 The figure is a schematic diagram showing the position of the magnetic switch of the male urinary catheter of the present invention with part of the tube wall removed.

[0049] Fig.12 It is a schematic diagram of the components of the magnetic switch of the male urinary catheter of the present invention.

[0050] Fig.13 It is a first schematic diagram of the intermediate movable component of the magnetic switch of the male urinary catheter of the present invention.

[0051] Fig.14 This is a second schematic diagram of the intermediate movable component of the magnetic switch of the male urinary catheter of the present invention.

[0052] Fig.15 The third schematic diagram is a middle movable component of the magnetic switch of the male urinary catheter of the present invention.

[0053] Fig.16It is a cross-sectional schematic diagram of the top portion of the male urinary catheter of the present invention.

[0054] Fig.17 It is a schematic diagram of the top portion of the male urinary catheter of the present invention when it is unfolded.

[0055] Fig.18 It is a first schematic diagram of the intermediate movable component of the magnetic switch of another embodiment of the male urinary catheter of the present invention.

[0056] Fig.19 This is a second schematic diagram of the intermediate movable component of the magnetic switch of another embodiment of the male urinary catheter of the present invention.

[0057] Fig. 20 It is a schematic diagram of the connecting rod of the male urinary catheter of the present invention. DETAILED DESCRIPTION

[0058] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0059] like Figure 1 As shown, a male urinary catheter comprises a urinary catheter body 100 and a top 200. The top 200 is in an unexpanded state, that is, the cross petals are close to the outer wall of the urinary catheter body 100, similar to an umbrella in a closed state. The unexpanded state of the top 200 is the normal state when the male urinary catheter is not working (i.e., the initial state before implantation).

[0060] like Figure 2 As shown, the catheter body 100 has a control switch area 300 at the lower position. In order to identify the position of the control switch area 300, color lines can be set on the catheter body 100 at both ends of the control switch area 300, such as Figure 2 Two lines of control switch area 300 are shown. Figure 2 The top 200 shown in the figure is in the expanded state, that is, after the top 200 of the male urinary catheter enters the patient's bladder, the cross valve is no longer close to the catheter body 100 and is in the expanded state. This state is the working state of the male urinary catheter (i.e., the fixed state after implantation).

[0061] like Figure 3 ,like Figure 4 He Ru Figure 5 As shown, the tail end 120 of the catheter body 100 is retained in the penis of the male patient and does not extend out of the penis. The catheter body 100 has a central hole 130, one end of which opens at the tail end 120 and the other end opens at the urination hole 207 of the top 200 (as shown in FIG. Fig.16As shown in the figure, the position of the urination hole 207 is shown, and the urination hole 207 is not shown). There is at least one urination hole 207, and there may be multiple urination holes. As a preferred embodiment, the urination hole 207 may also be located on the side flap. Since the top 200 is in the patient's bladder, the urine in the bladder can enter the central hole 130 from the urination hole 207, and then finally be discharged from the patient's body from the other end of the central hole 130. As a preferred embodiment, Figure 5 As shown, the tail end 120 also has a spare small hole 1110, and the spare small hole 1110 extends in the tube wall of the catheter body 100. One end of the spare small hole 1110 opens at the tail end 120, and the other end opens 201. Fig.16 As shown (pull wire 110 is not shown), spare small hole 1110 is located inside the catheter wall and close to the top 200, with opening 201 facing top flap 202. The passage of spare small hole 1110 also has some elastic protrusions, which can seal the passage of spare small hole when there is no metal guide wire; if the metal guide wire is inserted into the spare small hole 1110, the metal guide wire can squeeze the elastic protrusion to pass through. Spare small hole 1110 is only a further preference, not a necessary structure, because it is not shown in some drawings of the present application.

[0062] like Figure 3 He Ru Figure 4 As shown, one end of the pull wire 110 is connected to the top flap 202, and the other end extends out of the catheter body 100. The front end of the pull wire 110 extends in the central hole 130. At the control switch area 300, the pull wire 110 enters the catheter body 100 and extends. The rear end of the pull wire 110 leaves the catheter body 100, extends into the central hole 130, and extends out of the catheter 100. The expansion of the cross flap of the top 200 is controlled by the pull wire 100.

[0063] like Figure 6 As shown, the inner wall of the catheter body 100 corresponding to the control switch area 300 is provided with a first hole 111 and a second hole 112, respectively. The first hole 111 and the second hole 112 are connected, and the connected passage is located in the tube wall of the catheter body 100. The pull wire 110 enters the connected passage through the first hole 111, and the pull wire 110 leaves the connected passage from the second hole 112 and re-enters the central hole 130.

[0064] like Figure 7 He Ru Figure 8As shown, the block 121 includes a cone 123 and a circular protrusion 122 located on the bottom surface of the cone, the block 121 is located in the pull wire 110, the tip of the cone 123 is connected to the pull wire 110, and the circular protrusion 122 is also connected to the pull wire 110. The tip of the cone 123 faces and corresponds to the second hole 112, and the circular protrusion 122 is away from the second hole 112. The outer diameter of the circular protrusion 122 is greater than the diameter of the second hole 112. Figure 7 The circular protrusion 122 and the cone 123 are only a schematic diagram, and the bottom surface of the cone 123 is slightly larger than the outer diameter of the circular protrusion 122 .

[0065] When the cross-petal at the top is not unfolded, that is, when the cross-petal is close to the outer wall of the catheter body 100, the block 121 is located in the channel connecting the first hole 111 and the second hole 112, and is close to the second hole 112. When the pull wire 110 is pulled, the block 121 is pulled out of the channel connecting the first hole 111 and the second hole 112, and the block 121 is located in the central hole 130. Fig. 9 As shown, the cross petal at the top is in an expanded state, that is, the cross petal is expanded, similar to an umbrella in an open state, which is the working state of the male urinary catheter. As a preferred embodiment, the block 121 is made of silicone with a higher hardness, and the tip of the cone 123 faces and corresponds to the second hole 112. When the pull line 110 is pulled, the block 121 is easily pulled out of the second hole 112 under the action of tension. The second hole 112 has a certain elasticity. Under the action of tension, the second hole 112 expands so that the block 121 can be pulled out of the channel. When the block 121 leaves the channel and is located in the central hole 130, the second hole 112 shrinks under the elastic action. At this time, the circular protrusion 122 of the block 121 can block the second hole 112, thereby sealing the channel connecting the first hole 111 and the second hole 112. The clamping block 121 is located in the central hole 130 and is clamped at the second hole 112, so that the pull wire 110 is continuously tightened, and the pull wire 110 continuously tightens the top end 200, so that the cross-valve is in an open state and remains unchanged.

[0066] like Fig.17 As shown, the top 200 includes a top flap 202 extending along the catheter body 100 and four side flaps (i.e., cross flaps) extending along the radial direction of the catheter body 100, namely a first side flap 203, a second side flap 204, a third side flap 205, and a fourth side flap 206. Fig.17The four side flaps are shown in the unfolded state, with 90 degrees between adjacent side flaps. The top flap and the side flaps are generally made of silicone, which is soft and elastic. Preferably, the hardness of the top flap is greater than that of the side flaps. When the male urinary catheter needs to be placed in the patient's body, the top 200 enters the patient's bladder, the pull line 110 is pulled, and the top flap 202 is pulled by the pull line 110. The top flap 202 is deformed along the pulling direction, and the root of the top flap 202 is also deformed and moved along the pulling direction. The root of the top flap 202 is connected to the root of the side flap, and the deformation movement of the root of the top flap 202 also drives the roots of the four side flaps to move, so that the four side flaps are unfolded, similar to an umbrella in an open state.

[0067] The outermost dimension formed by the four side flaps is larger than the inner diameter of the urethra and bladder connection hole, so that the male urinary catheter can be stuck in the patient's bladder and will not fall out of the bladder. When the urinary catheter needs to be removed from the patient's body, the tension of the pull line 110 is released. Since the side flaps and the top flap are made of silicone and are elastic, under the action of restoring elasticity, the top flap 202 deforms forward and the side flaps move toward the urinary catheter body 100 along the axial direction of the tail end of the urinary catheter body 100 (the opposite direction of the top flap 202), forming the top 200 in an unexpanded state, a folded state, similar to the folded state of an umbrella; at this time, it is easy to remove the top 200 from the bladder, thereby pulling the urinary catheter out of the patient's urethra.

[0068] like Figure 10-12 As shown (for a clearer figure, the channel connecting the first hole 111 and the second hole 112 is not shown), a switch structure is provided at the control switch area 300, which can control the connection and closing of the central hole 130, thereby allowing urine to pass through or blocking urine from passing through. As a preferred embodiment, the catheter body part of the control switch area 300 is made of a resin or silicone with a relatively high hardness, so that the catheter body of this part is not completely deformed or deformed relatively slightly, thereby ensuring smooth movement of the second cylinder 150. The control switch area 300 is close to the tail end 120 of the catheter body 100, so that when the top end 200 of the male catheter is placed in the patient's bladder, the control switch area 300 is located in the penis of the male patient, which is convenient for controlling the switch by electromagnetic force.

[0069] In the center hole 130 of the control switch area 300, three permanent magnets, or two permanent magnets and a magnetic material (preferably the second cylinder 150 is a magnetic material) are arranged. Because the principle is similar, three permanent magnets are used for explanation. The first cylinder 140 is a permanent magnet. A through hole 141 is arranged at the center of the first cylinder 140, the first cylinder 140 is fixed on the inner wall of the center hole 130, and a seal is formed between the second cylinder 140 and the inner wall of the center hole 130, and the first cylinder 140 cannot move. The second cylinder 160 is a permanent magnet. A through hole 161 is arranged at the center of the second cylinder 160, the second cylinder 160 is fixed on the inner wall of the center hole 130, and a seal is formed between the second cylinder 160 and the inner wall of the center hole 130, and the second cylinder 160 cannot move. There is a certain distance between the first cylinder 140 and the second cylinder 160, forming a accommodating space. The third cylinder 150 is a permanent magnet, which is located in the central hole 130 and before the first cylinder 140 and the second cylinder 160. The outer diameter of the third cylinder 150 is slightly smaller than the inner diameter of the central hole 130, and the third cylinder 150 can move between the first cylinder 140 and the second cylinder 160 along the axial direction of the catheter.

[0070] As a preferred embodiment, the structure of the third cylinder 150 is as follows: Figure 13-15 As shown, a through hole 152 is arranged at the center of the third cylinder 150, and a cross-shaped rib 154 is arranged in the through hole 152, dividing the through hole 152 into four independent through holes. A column 153 is arranged at the cross intersection of the cross-shaped rib 154, and a ball 151 is fixed on the top of the column 153. Preferably, the first cylinder 140 is located below the male urinary catheter, the second cylinder 160 is located above the male urinary catheter, the ball 151 faces the through hole 161 of the second cylinder 160, the diameter of the ball 151 is larger than the diameter of the through hole 161, and the ball 151 can block the through hole 161 to prevent urine from flowing. As a preferred embodiment, the rib 154 may not be a cross, but may be a star shape separated by 120 degrees, or may be a straight plate.

[0071] The arrangement order of the first cylinder 140, the second cylinder 160 and the third cylinder 150 is that the first cylinder 140 is at the bottom, close to the tail end 120 of the male urinary catheter, the second cylinder 160 is at the top, far away from the tail end 120 of the male urinary catheter, and the third cylinder 150 is located between the first cylinder 140 and the second cylinder 160. The magnetic pole method is not unique, and a preferred embodiment is described here. The lower end of the first cylinder 140 is an S pole and the upper end is an N pole; the lower end of the second cylinder 150 is an S pole and the upper end is an N pole; the lower end of the third cylinder 160 is an S pole and the upper end is an N pole. Conversely, the magnetic poles of the three cylinders are opposite, which is also acceptable; the principle is that the opposite surfaces of the three cylinders should attract each other.

[0072] In the default state, when initially placed in the male patient's body, the ball 151 is against the through hole 161, and due to the attraction of the opposite magnetic poles of the second cylinder 160 and the third cylinder 150, the ball 151 seals the through hole 161; since the magnetic force and distance decay at least cubically, the second cylinder 160 and the third cylinder 150 are in contact, and therefore, the magnetic force between the second cylinder 160 and the third cylinder 150 is much greater than the magnetic force between the third cylinder 150 and the first cylinder 140, thereby forming a seal of the third cylinder 150 against the center hole 161 of the second cylinder 160. After the male catheter is successfully placed in the male body, the control switch area 300 is located in the male penis part. When the patient needs to urinate, the external drive device in Chinese Patent Application No. 201811485073 (such as this patent) can be used. Fig.12 and 13 As shown in the figure, the structure of the external drive device of the patent is introduced here, and the external drive device includes a ring coil that can apply forward and reverse currents. The male penis is located at the center of the external drive device, and the external drive device applies a forward current. At this time, the third cylinder 150 is subjected to a force in the direction of the first cylinder 140, so that the third cylinder 150 and the second cylinder 160 are separated, and the third cylinder 150 moves toward the first cylinder 140. Finally, the third cylinder 150 and the first cylinder 140 are attracted together, and the external drive device is powered off. Due to the magnetic force, the third cylinder 150 and the first cylinder 140 are attracted together. At this time, the third cylinder 150 no longer seals the second cylinder 160, and the male patient can urinate normally.

[0073] When the male patient finishes urinating, the external drive device applies a reverse current, and the third cylinder 150 is subjected to a force toward the second cylinder 160, so that the third cylinder 150 and the first cylinder 140 separate, and the third cylinder 150 moves toward the second cylinder 160. Finally, the third cylinder 150 and the second cylinder 160 are attracted together, and the ball 151 abuts against the through hole 161 and remains there, forming a seal again, and the external drive device is powered off.

[0074] The structural form of the third cylinder 150 is not limited to the structure described above. Figure 18-19As shown, the third cylinder 150 includes a central cylinder 155, an outer ring and ribs 156. The central cylinder 155 and the outer ring are coaxial, and the ribs 156 connect the central cylinder 155 and the outer ring. The number of ribs 156 is preferably four, and the angle between each rib is 90 degrees; it can also be three, and the angle between each rib is 120 degrees; of course, it can also be other numbers. The structure of the second cylinder 160 in this embodiment is the same as that in the previous embodiment. The diameter of the central cylinder 155 is larger than the diameter of the through hole 161 of the second cylinder 160. When the third cylinder 150 and the second cylinder 160 are attracted together, the central cylinder 155 seals the through hole 161 of the second cylinder 160. The diameter of the through hole 141 of the first cylinder 140 is larger than the diameter of the central cylinder 155. When the first cylinder 140 and the third cylinder 150 are attracted together, urine can still be discharged normally because the diameter of the through hole 141 is larger than the diameter of the central cylinder 155. As a further preferred embodiment, the structures of the first cylinder 140 and the third cylinder 150 can be the same. Figure 18-19 As shown, when the first cylinder 140 and the third cylinder 150 are attracted together, urine can flow out from the gap between the central cylinder 155 and the outer ring. The outer drive device controls the movement of the third cylinder 150 in the same manner as described above.

[0075] As a preferred embodiment, in order to provide a sealing effect, an elastic material may be wrapped on the surface of the sphere 151 and the elastic material may be fixed on the upper surface of the central cylinder 155 .

[0076] The following is a preliminary estimate of the magnetic dynamic simulation and urination time of the core urine control component.

[0077] Preferably, the permanent magnetic material C009 in Table 1 may be used.

[0078] Table 1 Permanent magnet material parameters

[0079]

[0080] The rightmost tension value in Table 1 is the tension when the distance is 0. If the distance between the first cylinder and the second cylinder is 8 mm, the magnetic tension is shown in Table 2 below.

[0081] Table 2 Magnetic materials using the dimensions in Table 1, magnetic force at a distance of 8 mm.

[0082]

[0083] Taking into account some extreme conditions of male patients, such as coughing.

[0084] Table 3 shows the abdominal pressure generated when a man coughs

[0085]

[0086] Table 4 Force values ​​between three cylinders

[0087]

[0088] As a preferred embodiment, A4mm is the second cylinder, with a length of 4mm; B4mm is the third cylinder, with a length of 4mm; C4mm is the first cylinder, with a length of 4mm. The two 4mm in the middle of the table represent the distance between the first cylinder and the second cylinder, which is 8mm in total. AB represents that the second cylinder and the third cylinder are attracted together, and BC represents that the first cylinder and the third cylinder are attracted together. NS represents the magnetic pole of the magnet.

[0089] Poiseuille's law R is the radius of the urethra, which is 1.25 mm at the middle hole; the urine viscosity η is 6.9×10 - 4 Pa·s; urethral length L was taken as 22 cm; Δp was calculated based on the lowest bladder pressure of 40 cm H2O during urination in most patients (4×10 3 Pa), Q = 25.3 ml / s; for most people, the maximum urine volume during storage period is 500 ml, and urination takes about 20 seconds; for an overfilled bladder, the urine volume is 800 ml, and urination takes about 32 seconds.

[0090] like Fig. 20 As shown, the connecting rod 400 includes a central through hole 410 and a permanent magnet 430 at one end. The spare small hole 420 is a through hole, which is used to correspond to the spare small hole 1110 of the catheter body 100. The spare small hole 420 is not a necessary structure and is only shown in the figure. Figure 5 As shown, the end surface of the tail end 120 of the catheter body 100 has a plurality of metal round blocks, which are not shown in the figure. The metal round blocks are evenly distributed on the end surface of the tail end 120.

[0091] When it is necessary to put the male urinary catheter into the patient's body, first insert the male urinary catheter into the patient's urethra and push it forward. At this time, the cross flap of the top 200 is in a closed state. When the tail end 120 of the catheter is still outside the patient's urethra, the permanent magnet 430 of the connecting rod 400 and the tail end 120 of the catheter are adsorbed together, and the pull wire 110 has a sufficient length to extend out from the central through hole 410 of the connecting rod 400. Continue to push the male urinary catheter through the connecting rod 400. When the top 200 enters the patient's bladder, the control switch area 300 and the tail end 210 are located in the patient's penile urethra. Pull the pull wire 110 and the top flap 202 receives the pulling force of the pull line 110 and moves downward, so that the first side flap 203, the second side flap 204, the third side flap 205 and the fourth side flap 206 move in the direction away from the catheter body 100. As the block 121 is pulled out of the second hole 112, the second hole 112 has a certain elasticity. Under the action of the pulling force, the second hole 112 expands so that the block 121 can be pulled out of the channel. When the block 121 leaves the channel and is located in the central hole 130, the second hole 112 shrinks under the elastic action. At this time, the circular protrusion 122 of the block 121 can block the second hole 112, thereby sealing the channel connecting the first hole 111 and the second hole 112. The block 121 is located in the central hole 130 and is stuck at the second hole 112, so that the pull line 110 is continuously tightened, and the pull line 110 continuously tightens the top flap 202 of the top 200, so that the four side flaps are in an open state and remain unchanged. The outer end size of the four side flaps after expansion is larger than the urethra size, so that the top end 200 of the male urinary catheter can be kept in the patient's bladder without falling out. A cotton swab (preferably a urine protection cotton swab) is inserted from the central through hole 410, the top end of the cotton swab is against the first cylinder 140, and the connecting rod 400 is pulled outward to separate the permanent magnet 430 and the tail end 120 of the urinary catheter, and the connecting rod 400 is pulled out of the urethra, and the cotton swab is taken out, and the male urinary catheter is placed.

[0092] In the default state, the second cylinder 160 and the third cylinder 150 are attracted together to form a sealed state, and urine cannot be discharged. When urination is required, the external drive device is fed with a forward current to drive the third cylinder 150 to move toward the first cylinder 140, the third cylinder 150 and the first cylinder 140 are attracted together, and the external drive device is powered off; at this time, urine enters the central hole 130 of the male urinary catheter through the urination hole 207, and the urine passes through the through hole 161 of the second cylinder 160, through the through hole 152 of the third cylinder 150, and then through the through hole 141 of the first cylinder 140, and finally from the end of the central hole 130 of the male urinary catheter, enters the urethra of the male patient, and is finally discharged from the body. When the patient has finished urinating, the external drive device is fed with a reverse current to drive the third cylinder 150 to move toward the direction of the second cylinder 160, and the third cylinder 150 and the second cylinder 160 are attracted together again to form a seal. The external drive device is powered off; preferably, for the convenience of carrying or using, the external drive device can be powered by a battery or a mobile power supply.

[0093] When the urinary catheter needs to be removed from the patient's body, the connecting rod 400 is inserted into the patient's urethra, the permanent magnet 430 of the connecting rod 400 absorbs the male urinary catheter tail end 120, slightly pulls the pull line 110 in the central through hole 410, and then inserts the annular metal sheet or the fan-shaped metal sheet into the central through hole 410 of the connecting rod 400. The top of the annular metal sheet or the fan-shaped metal sheet has a blade. Since the annular metal sheet or the fan-shaped metal sheet moves in the central through hole 410 and the central hole 130, it will not hurt the patient's urethra. The central through hole 410 and the central hole 130 have the same diameter and are coaxial. The diameter of the annular metal sheet or the fan-shaped metal sheet can be basically equal to the inner diameter of the central through hole 410. The top blade of the annular metal sheet or the fan-shaped metal sheet is used to cut off the pull wire on the end side of the circular protrusion 122 of the block 121, and the annular metal sheet or the fan-shaped metal sheet is pulled out, and the pull wire of the cut part is pulled out. Due to the loss of the function of the block 121, the top flap 202, the first side flap 203, the second side flap 204, the third side flap 205 and the fourth side flap 206 of the top 200 return to their original positions under the action of the elastic restoring force, and the four side flaps return to the retracted state. The four side flaps are attached to the outer wall of the catheter body 100 again. At this time, the outer diameter of the top 200 is smaller than the inner diameter of the urethra, and the connecting rod 400 is pulled out to drive the male catheter to be pulled out, and the removal of the male catheter is completed.

[0094] As a preferred embodiment, in order to meet the needs of different individuals, the male urinary catheter can have a variety of models and different lengths.

[0095] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A male urinary catheter with a magnetic switch, characterized in that: include: Catheter body; A first cylinder with a through hole, which is made of permanent magnetic material and fixed in the channel of the catheter body; A second cylinder with a through hole, which is made of permanent magnetic material and fixed in the channel of the catheter body and has a certain distance from the first cylinder; A third cylinder, which is made of permanent magnetic material and is movably disposed in the channel of the catheter body between the first cylinder and the second cylinder; the third cylinder comprises a through hole and a sealing structure; Wherein, the sealing structure can block the through hole of the second cylinder; the first cylinder and the second cylinder can magnetically attract the third cylinder; The end of the male urinary catheter is located in the urethra of the male penis; the first cylinder, the second cylinder and the third cylinder are close to the end of the male urinary catheter and are located in the urethra of the male penis; The top end of the urinary catheter made of elastic material comprises: a top flap extending along the axial direction of the urinary catheter body and a plurality of side flaps that can be radially expanded along the urinary catheter body; the top flap and the plurality of side flaps are connected at their roots; when no external force is applied, the plurality of side flaps lean against the urinary catheter body and are in a retracted state; when the top flap is subjected to a tensile force, the plurality of side flaps can be radially expanded along the urinary catheter body and are in an expanded state; A pull wire, one end of which is connected to the top flap, and the other end of which extends out of the male urinary catheter; the first part of the pull wire extends in the central hole of the urinary catheter body, the second part of the pull wire enters into the tube wall of the urinary catheter body when the control switch area is formed corresponding to the first cylinder, the second cylinder and the third cylinder, and the third part of the pull wire enters into the central hole of the urinary catheter body again after passing through the control switch area. Wherein, the tube wall of the urinary catheter body has a channel formed by a first hole and a second hole in the area corresponding to the control switch, the pull wire enters from the first hole, and the pull wire extends from the second hole; A clamping block, comprising a cone and a circular protrusion, wherein the circular protrusion is fixed on the bottom surface of the cone; two ends of the clamping block are respectively connected to the pull wire, the tip of the cone is connected to the pull wire, and the circular protrusion is connected to the pull wire; When the plurality of side petals are in a folded state, the block is located in the channel, and the tip of the cone faces the second hole; When the multiple side petals are in an expanded state, the clamping block is in the central hole, the diameter of the circular protrusion is larger than the diameter of the second hole, and the circular protrusion seals the second hole; the clamping block is clamped outside the second hole and remains motionless; A connecting rod having a central through hole and a permanent magnet at one end thereof; The end surface of the male urinary catheter is provided with a plurality of round blocks of magnetic material; The permanent magnet on the connecting rod can absorb the round block on the end surface of the male urinary catheter.

2. The male urinary catheter with a magnetic switch according to claim 1, characterized in that: The sealing structure includes a spherical ball and a rib plate; The rib plate is fixed in the through hole of the third cylinder to divide the through hole of the third cylinder into a plurality of channels; The ball is fixedly supported on the rib plate and is located outside one end of the third cylinder, and can seal the through hole of the second cylinder.

3. The male urinary catheter with a magnetic switch according to claim 1, characterized in that: The sealing structure comprises a central cylinder and ribs; The third cylinder is a ring, the central cylinder is located at the center of the ring, and the rib plate connects the central cylinder and the inner wall of the ring; The central cylinder can block the through hole of the second cylinder; the diameter of the through hole of the first cylinder is larger than the diameter of the central cylinder; The diameter of the through hole of the first cylinder is larger than the diameter of the central cylinder.

4. The male urinary catheter with a magnetic switch according to claim 1, 2 or 3, characterized in that: Also includes: The external driving device can input positive and negative currents to drive the movement of the third cylinder.

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