CN213789605U

CN213789605U - Novel bipolar intracavity electrical stimulation electrode for bladder

Info

Publication number: CN213789605U
Application number: CN202022489333.9U
Authority: CN
Inventors: 廖利民; 谭军; 李�浩; 李晞; 陈国庆
Original assignee: China Assistive Devices And Technology Centre For Persons With Disabilities; Hangzhou Chengnuo Medical Technology Co ltd; China Rehabilitation Research Center
Current assignee: China Assistive Devices And Technology Centre For Persons With Disabilities; Hangzhou Chengnuo Medical Technology Co ltd; China Rehabilitation Research Center
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-07-27
Anticipated expiration: 2030-11-02

Abstract

The utility model discloses a novel bipolar electrical stimulation electrode in bladder cavity, wherein a catheter unit is in a long-strip tubular shape and comprises a flexible front end and a non-flexible rear end, a urethral catheterization opening is arranged on one side of the head part of the flexible front end, and an interlayer is arranged on the tube wall of the catheter unit; the interface unit is arranged at the non-flexible rear end; the core guiding unit is arranged in a urethral catheterization channel of the urethral catheter unit and supports the urethral catheter unit when the urethral catheter unit is inserted; the electrode unit comprises a near-end electrode, a far-end electrode and an electrode wire, the near-end electrode is arranged at the flexible front end of the catheter unit and is adhered to the periphery of the tube wall of the catheter unit in an injection molding mode, the far-end electrode is arranged on the interface unit, the near-end electrode and the far-end electrode are electrically connected through the electrode wire, and the electrode wire is arranged in the tube wall interlayer of the catheter unit. The utility model discloses utilize and lead core unit to support the catheter unit, set up the near-end electrode that is used for the electro photoluminescence at the flexible front end of catheter unit, simple structure, easy to maintain, simple operation.

Description

Novel bipolar intracavity electrical stimulation electrode for bladder

Technical Field

The utility model belongs to the nerve stimulation field, in particular to novel bipolar intracavity electrical stimulation electrode.

Background

Bladder hypoactivity (UAB) is a syndrome caused by a variety of causes, including hesitancy to urinate, effort, difficulty in urinating, slow stream, intermittent urination, dribbling, prolonged Bladder emptying, and/or incomplete Bladder emptying.

UAB is a major component of lower urinary tract symptoms, and its pathophysiological mechanisms include low detrusor activity, no detrusor contraction, decreased or absent sensation in the bladder, and dysfunction of the urethral sphincter and pelvic floor muscle, etc., due to non-mechanical bladder outlet obstruction. UAB can cause repeated urinary infections, vesicoureteral reflux, hydronephrosis, and even renal insufficiency, and even renal failure.

Current treatment methods for UAB include drug therapy, surgical therapy, and sacral neuromodulation. Reports have shown that there is some controversy in drug therapy due to low efficacy and general adverse effects. Although the surgery treatment can effectively improve the symptoms of UAB, the surgery treatment has great limitation and is not accepted by most patients due to large surgical trauma and high cost. There are also some definite complications of surgical treatment of UAB, such as bleeding, vesico-vaginal fistulas, stress urinary incontinence, urethral stricture, and retrograde ejaculation. Sacral neuromodulation may be used to treat UAB, and is an effective option for non-obstructive urinary retention, but the treatment costs are high, hospitalization is required, long-term start-up is required, it is an invasive therapy, and some patients may feel uncomfortable or unbearable. Patients with long-term urinary retention can only be forced to choose to clean intermittent catheterization, indwelling urinary catheters or cystostomy, but these methods can only delay the progress of UAB, delay further damage to UAB, and fail to cure UAB. The therapeutic goals of UAB are to protect the upper urinary tract function, prevent bladder over-expansion, and reduce residual urine volume.

Electrical stimulation in the bladder cavity is used as a conservative treatment method, the bladder emptying is improved by stimulating the inner wall of the bladder and adjusting the contraction of detrusor through the neural reflex of the central nervous system, and the method has the advantages of simple and easy operation, low treatment cost, short treatment period, no wound, capability of effectively reducing the inter-conduction infection frequency and the like.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a novel bipolar intracavity of bladder electro photoluminescence electrode can carry out the intracavity of bladder electro photoluminescence when conventional intermittent type catheterization, need not to inject normal saline and use the sacculus in the use.

In order to achieve the above purpose, the utility model provides a novel bipolar intravesical electrical stimulation electrode, which comprises a catheter unit, an electrode unit, a guide core unit and an interface unit, wherein,

the catheter unit is in a long-strip tubular shape and comprises a flexible front end and a non-flexible rear end, a catheter port is formed in one side of the head of the flexible front end, and an interlayer is arranged on the wall of the catheter unit; the interface unit is arranged at the non-flexible rear end; the core guiding unit is arranged in a urethral catheterization channel of the urethral catheter unit and supports the urethral catheter unit when the urethral catheter unit is inserted; the electrode unit comprises a near-end electrode, a far-end electrode and an electrode wire, the near-end electrode is arranged at the flexible front end of the catheter unit and is adhered to the periphery of the tube wall of the catheter unit in an injection molding mode, the far-end electrode is arranged on the interface unit, the near-end electrode and the far-end electrode are electrically connected through the electrode wire, and the electrode wire is arranged in the tube wall interlayer of the catheter unit.

Preferably, said flexible front end is from the head of the catheter unit to 1.5cm-2.5cm beyond the proximal electrode.

Preferably, the flexible front end of the catheter unit is made of rubber.

Preferably, the non-flexible rear end of the catheter unit is made of silicone rubber and/or PVC.

Preferably, the outer wall of the catheter unit is provided with a hydrophilic coating.

Preferably, the proximal electrodes are provided in two.

Preferably, the distal electrodes are provided in two.

Preferably, the core guiding unit is made of ABS or PVC material.

Preferably, the proximal electrode is circular or semi-circular.

Preferably, the distal electrode is circular or semi-circular.

The beneficial effects of the utility model include at least:

1. the stimulating electrode is integrated in the catheter unit, initially, the catheter unit is internally provided with the guide core unit, the guide core unit supports the catheter to enable the catheter to be straight, the catheter is convenient to insert into a bladder, after the catheterization is finished, the guide core unit is taken out, a near-end electrode arranged on the catheter unit can be bent in a self-adaptive mode according to the space structure in the bladder cavity, the near-end electrode of the bent part is attached to the inner wall of the bladder or is in contact with urine in the cavity to perform electrical stimulation, the processes of filling physiological saline and pressurizing/releasing the pressure of the balloon are omitted, and the use is more convenient and efficient;

2. the flexible front end part of the catheter unit is made of soft materials, is attached to the inside of the bladder after being bent in a self-adaptive manner, and cannot generate mechanical damage to the inner wall of the bladder;

3. the bipolar intravesical electrical stimulation electrode can be used for cleaning intermittent catheterization and can also be used for electrical stimulation in the bladder cavity after being connected with an external stimulation device;

4. the outer wall of the catheter unit is provided with a hydrophilic coating or material, so that the resistance in the plugging and unplugging process is small, and the mechanical damage to the urethra is reduced;

5. the stimulating electrodes are integrated at the front end of the catheter unit, when electrical stimulation is carried out in the bladder cavity, one or more pairs of stimulating electrodes form a stimulating loop by means of liquid in the bladder, the process that the stimulating electrodes are inserted into the stimulating electrodes through the catheter and the stimulating loop is formed by adhering body surface electrodes is omitted, and the use is more convenient and efficient;

6. the proximal end electrode of the catheter integrated with the stimulation electrode is encapsulated on the outer surface of the catheter in an injection molding manner, is highly matched with the outer wall of the catheter, and has no obvious bulge or recess, so that the use process is smooth and unobstructed;

7. the far-end electrode can be injection-molded on the inner wall or the outer surface of the interface unit according to the connection requirement, and is compatible with different types of connection terminals;

8. the electrode wire is integrated in the catheter wall interlayer, the electrode wire is soft in texture and very small in line diameter, and the flexibility of the catheter is not affected.

Drawings

In order to make the purpose, technical scheme and beneficial effect of the utility model clearer, the utility model provides a following figure explains:

fig. 1 is a schematic structural diagram of a novel bipolar intravesical electrostimulation electrode according to an embodiment of the present invention;

fig. 2 is an enlarged schematic view of the structure of the novel bipolar intravesical electro-stimulation electrode according to the embodiment of the present invention;

fig. 3 is a schematic diagram of the insertion of the novel bipolar intravesical electrostimulation electrode of one embodiment of the present invention into the bladder;

fig. 4 is a schematic diagram of the novel bipolar intravesical electrostimulation electrode of an embodiment of the present invention being inserted after insertion into a bladder for catheterisation;

fig. 5 is a schematic view of a drawing core unit of the novel bipolar intravesical electro-stimulation electrode according to an embodiment of the present invention;

fig. 6 is a schematic diagram of the usage status of the novel bipolar intravesical electrostimulation electrode according to an embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1-6, the novel bipolar intravesical electrostimulation electrode of the embodiment of the present invention comprises a catheter unit 10, an electrode unit, a core unit 20 and an interface unit, wherein,

the catheter unit 10 is in a long-strip tubular shape, the catheter unit 10 comprises a flexible front end and a non-flexible rear end, a catheter port 11 is arranged on one side of the head of the flexible front end, and an interlayer is arranged on the wall of the catheter unit 10; the interface unit is arranged at the non-flexible rear end; the core unit 20 is arranged in the catheterization channel of the catheter unit 10, supporting the catheter unit 10 when it is inserted; the electrode unit comprises a near-end electrode 31, a far-end electrode 32 and an electrode wire 33, the near-end electrode 31 is arranged at the flexible front end of the catheter unit 10 and is bonded to the periphery of the tube wall of the catheter unit 10 in an injection molding mode, the far-end electrode 32 is arranged on the interface unit, the near-end electrode 31 and the far-end electrode 32 are electrically connected through the electrode wire 33, and the electrode wire 33 is arranged in a tube wall interlayer of the catheter unit 10.

In a particular embodiment, the flexible front end is 1.5cm-2.5cm from the head of the catheter unit 10 to beyond the proximal electrode 31. The flexible front end of the catheter unit 10 is made of rubber; the non-flexible rear end is made of silicon rubber and/or PVC. The outer wall of the catheter unit 10 is provided with a hydrophilic coating.

2-8 near-end electrodes 31 are arranged, and are in the shape of a circular ring, a semicircular ring or an arc surface, and when the near-end electrodes are in the shape of an arc surface, a plurality of arc surfaces are arranged to form a discontinuous circular ring in the preferred embodiment; the number of the distal electrodes 32 is 2-8.

The core guiding unit 20 is made of ABS or PVC, and is elastic and rigid.

Referring to the use diagrams of fig. 3-6, the catheter unit 10 is a catheter with a shape adaptive to bending, the bending shape is related to the space structure in the cavity of the bladder 50, and the bent catheter is in a question mark shape when in use; the catheter unit 20 is a supporting inner core for fixing and supporting the catheter unit 10, and is initially located in the inner diameter of the catheter unit 10, and the supporting catheter unit 10 makes the catheter unit 10 straight and convenient for inserting into the urinary bladder 50. In use, referring to fig. 3, the catheter unit 10 is inserted into the urinary bladder 50 along the urethra, catheterization is performed through the urethral catheterization opening 11, after the urine 51 in the urinary bladder 50 is led out, referring to fig. 4-5, the core guiding unit 20 is taken out to make the flexible front end and the proximal end electrode 31 of the catheter unit 10 partially restore to the self-bending shape, the reinforcing part 42 of the interface unit arranged at the non-flexible rear end of the catheter unit 10 is held and inserted into the catheter unit 10 continuously, referring to fig. 6, the proximal end electrode 31 of the bending part is contacted with the inner wall of the urinary bladder 50 or the urine 51 in the cavity close to the dry and flat urinary bladder 50, and electrical stimulation is performed; the electrode unit comprises a near-end electrode 31, a far-end electrode 32 and a wire electrode 33; the interface unit comprises a connecting end 41 and a reinforcing part 42, wherein the connecting end 41 is arranged at the non-flexible rear end of the catheter unit 10, is in a branch shape and is used for connecting an external electrostimulation device; the stiffening portion 42 is arranged at the main channel at the non-flexible rear end of the catheter unit 10 and serves for gripping and stiffening during insertion and use.

The proximal electrode 31 is arranged close to the flexible front end portion of the catheter unit 10, and the core unit 20 is initially positioned in the inner diameter of the catheter unit 10, making the catheter unit 10 straight, see fig. 3. After the catheter unit 10 has been inserted into the cavity of the urinary bladder 50, the intermittent catheterization is started to be cleaned, see fig. 4. After the urine 51 is drained or partially drained, the core unit 20 is withdrawn, and the proximal electrode 31 of the catheter can be bent adaptively according to the luminal space structure of the bladder 50, see fig. 5. Continuing to grasp the stiffening portion 42 and continue to insert the catheter unit 10, the proximal electrode 31 provided on the curved flexible front end abuts against the inner wall of the deflated bladder 50 or contacts the intraluminal urine 51, see fig. 6.

The catheter unit 10 is made of a biocompatible material such as natural rubber, silicone rubber or PVC, and the outer wall of the catheter unit is provided with a hydrophilic coating, so that the catheter unit can be inserted through the urethra conveniently, mechanical damage to the urethral wall is reduced, and urinary tract infection is reduced.

The proximal electrode 31 is encapsulated on the outer wall of the catheter unit 10 by injection molding, and is smoothly combined with the outer wall of the catheter unit 10 without protrusion and depression. The distal electrode 32 is injection molded to the outer or inner wall of the connection end 41 of the interface unit. The electrode unit can be made of medical stainless steel or biocompatible medical metal; the proximal electrode 31 is placed in the cavity of the bladder 50 through the urethra, attached to the inner wall of the bladder 50 in a deflated state or in contact with urine 51 in the cavity, and is used for transmitting an electrical stimulation signal to the inner wall of the bladder 50; the distal electrode 32 is left outside the bladder 50, and is connected with an external electric stimulator; the proximal electrode 31 is 3mm in length; when two or more proximal electrodes 31 are provided, the distance between the proximal electrodes 31 is 5 cm; the flexible front end has a length of 5-8cm, starting from the head of the catheter unit. The catheter port 11 is 1-2cm from the head of the catheter unit. The distal electrodes 32 are 3mm in length, and when two or more distal electrodes 32 are provided, the distal electrodes 32 are spaced apart by 3 cm.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. A novel bipolar intracavity electrical stimulation electrode for the bladder is characterized by comprising a catheter unit, an electrode unit, a core guiding unit and an interface unit, wherein,

2. The novel bipolar intravesical electro-stimulation electrode of claim 1, wherein the flexible front end is 1.5cm-2.5cm from the head of the catheter unit to beyond the proximal electrode.

3. The novel bipolar intravesical electrostimulation electrode of claim 1, wherein the flexible front end of the catheter unit is made of rubber.

4. The novel bipolar intravesical electro-stimulation electrode of claim 1, wherein the non-flexible rear end of the catheter unit is made of silicone rubber and/or PVC.

5. The novel bipolar intravesical electro-stimulation electrode of claim 1, wherein the outer wall of the catheter unit is provided with a hydrophilic coating.

6. The novel bipolar intravesical electrical stimulation electrode of claim 1 wherein there are two of the proximal electrodes.

7. The novel bipolar intravesical electrical stimulation electrode of claim 1 wherein there are two distal electrodes.

8. The novel bipolar intravesical electro-stimulation electrode of claim 1, wherein the core guiding unit is made of ABS or PVC.

9. The novel bipolar intravesical electrical stimulation electrode of claim 1 wherein the proximal electrode is in the shape of a circular ring or a semi-circular ring.

10. The novel bipolar intravesical electrical stimulation electrode of claim 1 wherein the distal electrode is in the shape of a circular ring or a semi-circular ring.