Contact separation pressure sensor and indwelling catheter

Abstract

The contact separation pressure sensor comprises an electrode connection guide ring, at least three copper electrodes are arranged on one side of the electrode connection guide ring in the circumferential direction of the electrode connection guide ring, and the inner side of each copper electrode is connected with a negative friction electrode; and a urine channel is formed from the inner cavity formed by the negative friction electrodes to the inner ring of the electrode connecting guide ring. Through reasonable arrangement of the component structure, the situation that urine of a patient is retained in the bladder is monitored in real time, electrification is not needed, the size of the sensor is greatly reduced, the problem that real-time monitoring cannot be conducted due to replacement of a power source is solved, and practicability and safety are both good.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical device consumables, and in particular relates to a contact separation pressure sensor and an indwelling urinary catheter. Background Art

[0002] Indwelling urinary catheter refers to a method of draining urine by inserting a urinary catheter through the urethra into the bladder of patients with severe illness, coma, general anesthesia, etc. under strict aseptic operation. However, indwelling urinary catheters often have a series of blockage risks, such as small blood clots in the urine, urothelial exfoliation, partial folding of the external urinary catheter, or clamping of the urinary catheter, which will cause urine to be retained in the bladder and cannot be discharged normally. For mild patients with clear consciousness and clear expression, the patient will seek help from doctors and nurses in time when feeling uncomfortable and bloated, so as to solve the problem smoothly. However, for patients with severe illness, coma, general anesthesia, neurological diseases, etc. who cannot communicate and express normally, once the above problems occur, and medical staff and family members fail to discover the problems in time, serious consequences will occur, ranging from high blood pressure, rapid heart rate, urinary tract infection, renal damage, etc. to high-pressure bleeding, bladder rupture, and life-threatening. At the same time, soaring blood pressure and heart rate, renal damage, etc. will also aggravate the primary disease of severe patients, resulting in a decrease in treatment effect. Summary of the invention

[0003] In view of the above problems, the purpose of the utility model is to provide a contact separation pressure sensor and an indwelling urinary catheter to avoid the failure to promptly detect urine retention in the bladder, which may lead to increased intra-bladder pressure and intra-abdominal pressure, resulting in serious consequences such as increased blood pressure and heart rate.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model includes:

[0005] A contact separation pressure sensor comprises an electrode connection guide ring, at least three copper electrodes are arranged along the circumference of one side of the electrode connection guide ring, and a negative friction electrode is connected to the inner side of each copper electrode; the inner cavity formed by each negative friction electrode to the inner circle of the electrode connection guide ring is a urine channel.

[0006] Preferably, the copper electrodes are evenly arranged circumferentially on one side of the electrode connecting guide ring.

[0007] Preferably, the negative friction electrode and the copper electrode are both sheet-like structures, and the axis of each group of copper electrodes and the axis of the negative friction electrode coincide with the axis of the electrode connecting guide ring.

[0008] Preferably, there are 6 copper electrodes.

[0009] Preferably, a waterproof wire is connected to the other side of the electrode connecting conductor.

[0010] Preferably, the waterproof wire is parallel to the axis of the electrode connecting guide ring.

[0011] An indwelling urinary catheter comprises a urinary catheter and a pressure sensor arranged in the urinary catheter and near the urine inlet thereof, wherein the pressure sensor is the contact separation pressure sensor disclosed in the present application, wherein the electrode connecting guide ring and each copper electrode are attached to the inner wall of the urinary catheter, and each copper electrode is located between the electrode connecting guide ring and the urine inlet of the urinary catheter; and further comprising an alarm unit arranged at the urine outlet of the urinary catheter, wherein a developing line is connected between the alarm unit and the electrode connecting guide ring, and the developing line is attached to the inner wall of the urinary catheter along the flow direction of urine in the urinary catheter.

[0012] Preferably, the alarm unit includes an alarm light and a cellular alarm, and both the alarm light and the cellular alarm are connected to the developing line.

[0013] Preferably, it also includes an air bag arranged on the ureter and close to the urine inlet.

[0014] Preferably, the urinary inlet of the urinary catheter is connected to a urinary catheter head, the urinary outlet of the urinary catheter is connected to a urinary outlet tube, and the urinary catheter is connected to a water injection valve near its urinary outlet.

[0015] Compared with the prior art, the advantages of the utility model are:

[0016] (1) The contact-separation pressure sensor of the utility model can monitor the patient's urine retention in the bladder in real time by rationally arranging the component structure. It does not need to be powered on, which greatly reduces the size of the sensor and avoids the problem of being unable to monitor in real time due to power supply replacement. It has excellent practicality and safety.

[0017] (2) The contact-separation pressure sensor of the utility model maintains an electrostatic balance between each copper electrode and the negative friction electrode when no urine passes through the urine channel; when urine flows into the urine channel, the urine contacts the negative friction electrode. At this time, since the urine is full of freely moving ions, it is equivalent to the positive friction electrode. Relative motion occurs between the positive and negative friction electrodes, generating an electric potential difference. Electrons move from the urine to the negative friction electrode, and then are collected by the copper electrode to the electrode connecting ring, generating an induced current. As the urine pressure changes, the generated induced current also changes accordingly, so the patient can be monitored in real time.

[0018] (3) The indwelling urinary catheter of the utility model has a reasonable arrangement of the component structure. When the pressure in the bladder exceeds 40 cmH2O, the pressure of the urine flowing into the urine channel increases, and the current is transmitted to the alarm unit through the developing line to sound an alarm, so as to prompt the medical staff to deal with the patient's current urine retention state in time, thereby reducing the occurrence of various serious consequences such as high blood pressure, rapid heart rate, urinary tract infection, renal damage, bladder rupture, etc., especially for patients with severe illness, coma, neurological diseases, etc. who cannot communicate and express normally, the risk of urinary catheter blockage is minimized, thereby reducing the occurrence of medical accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of the contact and separation pressure sensor of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the indwelling urinary catheter of the utility model;

[0022] The symbols in the figure represent:

[0023] 1- waterproof wire; 2- electrode connection guide ring; 3- negative friction electrode; 4- copper electrode;

[0024] A-catheter; B-pressure sensor; C-airbag; D-development line; E-urine catheter; F-water injection hard valve; G-urine outlet; H-alarm unit; H1-alarm light; H2-cellular alarm. DETAILED DESCRIPTION

[0025] The utility model is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the utility model.

[0026] It should be noted that the directional terms mentioned in this article, such as "inner cavity", "inner periphery", "inner wall" and "outside", are consistent with the specific directions on the paper of the drawings in the specification or the corresponding directions of the space shown in the drawings; all components and equipment in the utility model, unless otherwise specified, are all components and equipment known in the prior art.

[0027] Example 1

[0028] A contact separation pressure sensor comprises an electrode connection guide ring 2, at least three copper electrodes 4 are arranged along the circumference of one side of the electrode connection guide ring 2, and a negative friction electrode 3 is connected to the inner side of each copper electrode 4; the inner cavity formed by each negative friction electrode 3 to the inner circle of the electrode connection guide ring 2 is a urine channel;

[0029] Its function is: when it is applied to an indwelling urinary catheter, when no urine passes through the urine channel, an electrostatic balance is maintained between each copper electrode 4 and the negative friction electrode 3; when urine flows into the urine channel, the urine contacts the negative friction electrode 3. At this time, since the urine is full of freely moving ions, which is equivalent to a positive friction electrode, relative movement occurs between the positive and negative friction electrodes, generating an electric potential difference, and electrons move from the urine to the negative friction electrode 3, and then are collected in the electrode connecting guide ring 2 through the copper electrode 4, and an induced current is generated. As the urine pressure changes, the generated induced current also changes accordingly, so the patient can be monitored in real time; the sensor disclosed in the present application does not need to be powered on, which greatly reduces the size of the sensor, and also avoids the occurrence of problems such as the inability to monitor in real time due to power replacement, and has excellent practicality and safety.

[0030] There are 6 copper electrodes 4 disclosed in this embodiment, and each copper electrode 4 is evenly arranged on one side of the electrode connecting guide ring 2 in the circumferential direction; the negative friction electrode 3 and the copper electrode 4 are both sheet-shaped structures, and the axis of each group of copper electrodes (4) and the axis of the negative friction electrode 3 coincide with the axis of the electrode connecting guide ring 2. A waterproof wire 1 is connected to the other side of the electrode connecting guide ring 2, and the waterproof wire 1 is parallel to the axis of the electrode connecting guide ring 2, and the current collected in the electrode connecting guide ring 2 is derived from the waterproof wire 1.

[0031] Among them, the copper electrode 4, waterproof wire 1 and electrode connecting ring 2 disclosed in this embodiment are all made of copper, and the negative friction electrode 33 is made of medical polytetrafluoroethylene. The materials are safe and reliable, have good mechanical properties and bacteria and corrosion resistance, are safe and reliable, and have low cost.

[0032] Example 2

[0033] An indwelling urinary catheter comprises a urinary catheter E, and also comprises a pressure sensor B arranged in the urinary catheter E and near the urine inlet thereof, wherein the pressure sensor B is the contact separation pressure sensor disclosed in Example 1, wherein an electrode connecting guide ring 2 and each copper electrode 4 are attached to the inner wall of the urinary catheter E, and each copper electrode 4 is located between the electrode connecting guide ring 2 and the urine inlet of the urinary catheter E; and also comprises an alarm unit H arranged at the urine outlet of the urinary catheter E, wherein a developing line D is connected between the alarm unit H and the electrode connecting guide ring 2, and the developing line D is attached to the inner wall of the urinary catheter E along the flow direction of urine in the urinary catheter E;

[0034] Its function is as follows: urine flows out of the urethra E, and when urine flows into the urine channel, urine contacts the negative friction electrode 3. At this time, since urine is full of free-moving ions, it is equivalent to a positive friction electrode. Relative movement occurs between the positive and negative friction electrodes, generating a potential difference. Electrons move from urine to the negative friction electrode 3, and then are collected in the electrode connecting guide ring 2 through the copper electrode 4, and an induced current is generated. As the urine pressure changes, the generated induced current also changes accordingly. If the pressure in the bladder exceeds 40cmH2O, it will increase the load of the ureter to transport urine, damage the anti-reflux mechanism of the bladder and ureter, and change the urine in the ureter. The normal delivery mode of urine will eventually lead to ureteral decompensation, resulting in ureteral dilatation and hydronephrosis; therefore, when the pressure in the bladder exceeds 40cmH2O, the pressure of urine flowing into the urine channel increases, and the current is transmitted to the alarm unit H through the developing line D to sound an alarm, so as to prompt medical care to deal with the patient's current urine retention status in time, thereby reducing the occurrence of various serious consequences such as high blood pressure, rapid heart rate, urinary tract infection, renal damage, bladder rupture, etc., especially for patients with severe illness, coma, neurological diseases, etc. who cannot communicate and express normally, the risk of urinary catheter blockage is minimized, thereby reducing the occurrence of medical accidents.

[0035] Among them, the electrode connecting ring 2 disclosed in this embodiment is connected to the developing line D through a waterproof wire 1. While transmitting current, the developing line D has a high transparency and is developed under X-rays, making it easy to confirm the drainage status and retention position.

[0036] Specifically, the alarm unit H includes an alarm light H1 and a cellular alarm H2, and both the alarm light H1 and the cellular alarm H2 are connected to the developing line D; their functions are: the alarm light H1 and the cellular alarm H2 sound an alarm at the same time to prompt medical staff to deal with the patient's current urine retention state in time, and remind medical staff that the patient's bladder pressure is abnormal and needs rapid treatment.

[0037] Specifically, it also includes an air bag C arranged on the urethra E and close to its urine inlet; its function is: the air bag C fixes the urethra E in the bladder by inflation to prevent the urethra E from accidentally slipping out of the urethra.

[0038] Specifically, the urine inlet of the urinary catheter E is connected to a catheter head A, which is oval in shape, has a smooth surface, a soft texture, and a certain degree of elasticity; the urine outlet of the urinary catheter E is connected to a urine outlet tube G, and the urinary catheter E is connected to a water injection valve F near its urine outlet, which is used to flush external saline into the bladder, and then discharge it through the central urine outlet tube G after flushing.

[0039] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0040] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0041] In addition, the various different implementation modes disclosed in this solution may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the content invented by the present disclosure.

Claims

1. A contact and separation pressure sensor, characterized in that: It comprises an electrode connecting guide ring (2), at least three copper electrodes (4) are arranged along the circumference of one side of the electrode connecting guide ring (2), and a negative friction electrode (3) is connected to the inner side of each of the copper electrodes (4); The inner cavity formed by each of the negative friction electrodes (3) to the inner circle of the electrode connecting guide ring (2) is a urine channel.

2. The contact-separation pressure sensor according to claim 1, wherein: Each of the copper electrodes (4) is evenly arranged in the circumferential direction on one side of the electrode connecting guide ring (2).

3. The contact and separation pressure sensor according to claim 2, wherein: The negative friction electrode (3) and the copper electrode (4) are both sheet-like structures, and the axis of each group of copper electrodes (4) and the axis of the negative friction electrode (3) coincide with the axis of the electrode connecting guide ring (2).

4. The contact-separation pressure sensor according to any one of claims 1 to 3, characterized in that: There are six copper electrodes (4).

5. The contact and separation pressure sensor according to claim 4, characterized in that: The other side of the electrode connection conductor (2) is connected to a waterproof conductor (1).

6. The contact and separation pressure sensor according to claim 5, characterized in that: The waterproof wire (1) is parallel to the axis of the electrode connecting conductor (2).

7. An indwelling urinary catheter, comprising a urinary catheter (E), characterized in that: It also includes a pressure sensor (B) arranged in the urinary catheter (E) and close to the urine inlet thereof, wherein the pressure sensor (B) is a contact and separation pressure sensor as described in any one of claims 1 to 6, wherein the electrode connecting guide ring (2) and each copper electrode (4) are attached to the inner wall of the urinary catheter (E), and each copper electrode (4) is located between the electrode connecting guide ring (2) and the urine inlet of the urinary catheter (E); It also comprises an alarm unit (H) arranged at the urine outlet of the urinary catheter (E), a developing line (D) is connected between the alarm unit (H) and the electrode connecting guide ring (2), and the developing line (D) is attached to the inner wall of the urinary catheter (E) along the flow direction of urine in the urinary catheter (E).

8. The indwelling urinary catheter according to claim 7, characterized in that: The alarm unit (H) comprises an alarm light (H1) and a cellular alarm (H2), and both the alarm light (H1) and the cellular alarm (H2) are connected to the developing line (D).

9. The indwelling urinary catheter according to claim 7, characterized in that: It also includes an air bag (C) arranged on the ureter (E) and close to its urine inlet.

10. The indwelling urinary catheter according to any one of claims 7 to 9, characterized in that: The urine inlet of the urinary tube (E) is connected with a urine catheter (A), the urine outlet of the urinary tube (E) is connected with a urine outlet tube (G), and the urinary tube (E) is connected with a water injection valve (F) near its urine outlet.

Images