CN203244688U

CN203244688U - Sacral nerve anterior root electrical stimulation system

Info

Publication number: CN203244688U
Application number: CN 201320266162
Authority: CN
Inventors: 闫鹏; 郑伟东
Original assignee: PEOPLE'S HOSPITAL JILIN PROVINCE
Current assignee: PEOPLE'S HOSPITAL JILIN PROVINCE
Priority date: 2013-05-16
Filing date: 2013-05-16
Publication date: 2013-10-23
Anticipated expiration: 2023-05-16

Abstract

The utility model discloses a sacral nerve anterior root electrical stimulation system used for treating neurogenic bladder such as spinal cord injury spastic bladder dysfunction. The sacral nerve anterior root electrical stimulation system includes a pulse stimulation subsystem and an electrode system; the electrode system includes sacral nerve anterior root stimulation electrodes; a central processor, a photoelectric isolation module, a power supply module, a digital-to-analog converter and an electric pulse generator which are connected with one another sequentially and are arranged inside the pulse stimulation subsystem, wherein the power supply module supplies power for each module; the electric pulse generator transmits electric stimulation pulses to the sacral nerve anterior root stimulation electrodes; and surfaces of positive electrodes and a negative electrode, which contact with sacral nerves, are provided with a plurality of protrusions. The sacral nerve anterior root electrical stimulation system of the utility model can make up for the deficiencies of existing sacral nerve anterior root stimulation electrodes. The sacral nerve anterior root electrical stimulation system is advantageous in urination mode, performance and price; and with the sacral nerve anterior root electrical stimulation system adopted, a satisfactory clinical effect has been obtained.

Description

Root electric stimulation before a kind of sacral nerves

Technical field

This utility model belongs to medical instruments field, is specifically related to a kind of be used for the treatment of root electric stimulation and electrode thereof before neurogenic bladder such as the handicapped sacral nerves of spinal cord injury spastic bladder.

Background technology

For spinal cord injury (spinal cord injury; SCI) patient, the phenomenon that high reflection of detrusor of bladder and detrusor-sphincter dyssynergia often occur, cause urine retention and renal damage, mostly adopted Drug therapy in the past, interrupted catheterization treatment and various operative treatments etc., but exist effect undesirable, treatment cycle is long, the shortcomings such as complication is many, until the appearance of sacral nerve roots stimulator, it is based on the detrusor principle different with the sphincter biological characteristics, when adopting discontinuous pulses to stimulate, can be owing to urinating appears in the intravesical pressure that continues to raise between twice stimulation period, but this mode of urinating belongs to a kind of pattern of manually urinating, stimulus parameter can not be suitable adjust, intravesical pressure is the very high injury of kidney that causes sometimes, secondly root comprises the nerve fiber that some arrange lower limb before the sacral nerves, the shake of lower limb can occur when stimulating, inconvenient patient's use, when root thorn swashs system before using early stage sacral nerves, must carry out sacral posterior rhizotomy, the height that can eliminate detrusor is like this opened reflection, but do so also and can produce some problems, for example: lost defecation reflex and erection reflex, for some male patients, such cost is unacceptable.

Rijkhoff in 1991 etc. propose anode retardance technology, can select to suppress the conduction of the large nerve of diameter by this technology, realize that minor diameter is neural excited separately, we are applied to this technology in the process of root electricity irritation before the sacral nerves, thereby make the more physiological of pattern of urinating.Using anode retardance technology carries out before the electricity irritation sacral nerves method of root and not only can be used for improving and urinate, the convenient use, in the future also may improve defecation, make the sacral nerve root stimulation technology be more suitable for the patient of incomplete injury of spinal cord, the pain problem when having eliminated incomplete injury of spinal cord patient electricity irritation.In addition, do not need to carry out sacral posterior rhizotomy by this kind method treatment spastic bladder and will become possibility yet.

General sacral nerve stimulation electrode surface is level and smooth surface, and the path of stimulating current presents different circulation patterns because of neural from the contact path of electrode, to a certain degree affects the conducting of electric current, seriously may cause stimulating unsuccessfully owing to Surface Contact is bad.

The utility model content

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, provides a kind of and treats that spinal cord injury is complete, root electric stimulation before the sacral nerves of spastic bladder.This system comprises: impulse stimulation subsystem and electrode subsystem; Root thorn swashed electrode before the electrode subsystem comprised sacral nerves; The impulse stimulation subsystem is comprised of central processing unit, photoelectric isolation module, power module, digital to analog converter (D/A), electric pulse generator, and this impulse stimulation circuit subsystem also can comprise display module and input module; Described power module is connected to central processing unit, photoelectric isolation module, digital to analog converter (D/A), electric pulse generator; Central processing unit is connected successively with photoelectric isolation module, digital to analog converter, pulse generator; Root thorn swashed electrode before pulse generator was connected to sacral nerves, and wherein, the surface that contacts nerve of described anelectrode and negative electrode has a plurality of projections.

Because this utility model merges the anode technology that blocks mutually with the sacral nerve root stimulation technology, remedy in the past sacral nerve roots stimulator deficiency, the action potential that produces when making the front root of electricity irritation sacral nerves can conduct in parasympathetic nervous by selectivity, the result shows when stimulating pulsewidth to reach 300us, when stimulating current reaches 1.05mA, urethra is intrinsic pressure reduces to zero, and shrinking separately appears in detrusor of bladder, and its bladder that causes is emptying very emptying near normal physiological; And electricity irritation the disease such as is acutely shaken and is also reduced even disappear.Because electrode surface has different structure, so that contact point is more, has improved the effect of electricity irritation.The result shows that the technology of urinating after anode retardance electrical stimulation technology and the stimulation is the same and can effectively rebuild bladder urination function behind the SCI, root stimulator and stimulating electrode thereof have some superiority at aspects such as the pattern of urinating, performance and prices before the sacral nerves of designing, and have obtained satisfied clinical effectiveness.

Description of drawings

Fig. 1 is the impulse stimulation subsystem figure of root electric stimulation before the sacral nerves of the present utility model.

Fig. 2 is the electrode subsystem figure of root electric stimulation before the sacral nerves of the present utility model.

Fig. 3 is circular ring electrode of the present utility model.

Fig. 4 is spiral electrode of the present utility model.

Fig. 5 is electrode surface partial enlarged drawing of the present utility model.

The specific embodiment

Below in conjunction with drawings and Examples this utility model is further specified.

Embodiment: the root electric stimulation comprises impulse stimulation subsystem (as shown in Figure 1) and electrode subsystem (as shown in Figure 2) before the sacral nerves; The impulse stimulation subsystem is comprised of central processing unit 1, photoelectric isolation module 2, power module 5, digital to analog converter (D/A) 3, electric pulse generator 4, and this impulse stimulation circuit subsystem also can comprise display module 6 and input module 7; Described power module 5 is connected to central processing unit 1, photoelectric isolation module 2, digital to analog converter (D/A) 3, electric pulse generator 4; Central processing unit 1 is connected successively with photoelectric isolation module 2, digital to analog converter 3, pulse generator 4; Pulse generator 4 is electrically connected on the connector 8 of electrode subsystem.Wherein, power module 5 comprises two synchro sources, and power supply wherein need use 9V, the power supply adaptor of 3A, and this power supply must isolate with electricity, can not normally start work with root electric stimulation before preventing from burning before the sacral nerves root electric stimulation or sacral nerves; The impulse stimulation subsystem can also comprise short-circuit protection circuit, and after being short-circuited, short-circuit protection circuit stops the front root electric stimulation work of sacral nerves immediately, eliminates the short circuit source, waits the rear recurrence usefulness of each electrical equipment cooling.In addition, input module 7 comprises a plurality of control knobs, this control knob can input various stimulus parameters according to needs of patients, parameter or the initial value provide is provided, these parameters comprise pulse frequency, pulse amplitude, pulse width, pulse working time and pulse duty factor etc., receive various parameter signals by central processing unit, send corresponding impulse stimulation ripple with control electric pulse generator 4; Display module 6 comprises display screen and the red relay indicating light that can show various impulse stimulation parameters, and this display lamp glimmers when having pulse to send, and the frequency of flicker is directly proportional with the pulse frequency of setting; Display module also can comprise power supply indicator, with the state of indication power supply connection.

Figure 2 shows that the electrode subsystem of root electric stimulation before the sacral nerves, this electrode subsystem comprises connector 8, three wires 9 and three stimulating electrodes 10,11 and 12; Connector 8 is electrically connected three wires 9 and pulse generator 4, the leading section of described wire 9 is electrically connected respectively with three stimulating electrodes 10,11 and 12, wherein three stimulating electrodes 10,11 and 12 are wherein two anelectrodes 10,11 and negative electrodes 12, adopt the symmetry electrode mode to configure, namely jointly be connected to described negative electrode 12 by described two synchro sources by the electric pulse generator 4 corresponding negative poles that connect two anelectrodes 10,11, two synchro sources; Therefore anode current ratio is set as 1: 1; Stimulus frequency is 3～35HZ, stimulates pulsewidth 50-700us, adopts the two-way rectangular pulse of charge balance; Stimulation time is set as 0-10s, rest 0-20s.

In the anode retardance electricity irritation process, select suitable stimulating electrode most important.Adopt three electrodes as stimulating electrode, can avoid to greatest extent stimulating current that surrounding tissue is disturbed like this; Electrode design must satisfy the condition that can implant for a long time, i.e. nontoxic, minimum foreign body reaction, and histocompatibility is good etc.The synthesise various factor, arrange described three electrodes 10,11 and 12 be shaped as circular (as shown in Figure 3), helical form (as shown in Figure 4), semicircular cylinder shape or hook-shaped any; Electrode 10,11 and 12 inner surface are provided with a plurality of projections 14, as shown in Figure 5, described projection 14 be shaped as taper shape, elliptical cylinder-shape, cylindrical or triangular pyramidal or other rule or erose projection, described projection can be passed through machining, welding or bondingly be connected with electrode surface, can regularly arranged or irregular alignment.

Wire 9 and electrode 10,11 and 12 material can be silver, platinumiridio, nickel, nickel alloy; Wire 9 overcoat medical high polymer insulation tubes 13.In addition, if insulation tube 13 diameters are excessive, electrode can with the nerve root loose contact, too small meeting causes implants difficulty and nerve root injury.Therefore, we are set as 0.05cm with the inside diameter of medical silica-gel insulation tube 13.

Above concrete mode of the present utility model is described.Description for utility model is illustrative herein, thereby scope of the present utility model should not be limited to the above-mentioned specific embodiment.It will be apparent to one skilled in the art that and the above-mentioned specific embodiment is carried out other distortion or change in the situation that do not break away from purport of the present utility model or substitutive characteristics, also should be considered as protection domain of the present utility model.

Claims

1. root electric stimulation before the sacral nerves, this electric stimulation comprises impulse stimulation subsystem and electrode subsystem; This impulse stimulation subsystem is comprised of central processing unit (1), photoelectric isolation module (2), power module (5), digital to analog converter (3), electric pulse generator (4); Described power module (5) is connected to central processing unit (1), photoelectric isolation module (2), digital to analog converter (3), electric pulse generator (4); Central processing unit (1) is connected successively with photoelectric isolation module (2), digital to analog converter (3), pulse generator (4); This electrode subsystem comprises connector (8), three wires (9) and three stimulating electrodes (10,11,12); Described connector (8) is electrically connected described three wires (9) and described pulse generator (4), the leading section of described three wires (9) is electrically connected respectively with described three stimulating electrodes (10,11,12), described three stimulating electrodes (10,11 and 12) wherein two be that anelectrode (10,11), one are negative electrode (12), adopt the symmetry electrode mode to configure; It is characterized in that: the surface that contacts sacral nerves of described anelectrode and negative electrode has a plurality of projections (14).

2. root electric stimulation before the sacral nerves according to claim 1 is characterized in that: described a plurality of projections be shaped as taper shape, elliptical cylinder-shape, cylindrical or triangular pyramidal.

3. root electric stimulation before the sacral nerves according to claim 1, it is characterized in that: the root electric stimulation also comprises input module (7) before this sacral nerves, this input module (7) comprises a plurality of control knobs, the initial value of the described parameter that provides by this button input electric pulse stimulation parameter and selection, receive above-mentioned input by central processing unit (1) with the parameter signal of selecting, send corresponding electric pulse stimulation signal with control electric pulse generator (4).

4. root electric stimulation before the sacral nerves according to claim 1 is characterized in that: described power module

(5) comprise two with the power supply synchronization power supply of electricity isolation, this power supply need use the power supply adaptor of 9V, 3A, described two power supply synchronization power supplys are by corresponding described two anelectrodes (10,11) that connect of described electric pulse generator (4), and the negative pole of described two power supply synchronization power supplys is connected on the described negative electrode (12) jointly.

5. root electric stimulation before the sacral nerves according to claim 1 is characterized in that: described three stimulating electrodes (10,11,12) be shaped as circular or semi-annular shape.

6. root electric stimulation before the sacral nerves according to claim 1, it is characterized in that: being shaped as of described three stimulating electrodes (10,11,12) is hook-shaped.

7. root electric stimulation before the sacral nerves according to claim 1 is characterized in that: described three stimulating electrodes (10,11,12) be shaped as helical form.

8. root electric stimulation before the sacral nerves according to claim 1, it is characterized in that: the material of described wire (9) and described three stimulating electrodes (10,11,12) is selected from any in silver, platinumiridio, nickel, the nickel alloy.

9. root electric stimulation before the sacral nerves according to claim 1, it is characterized in that: described wire (9) periphery cover has medical high polymer insulation tube (13), and the inside diameter of described insulation tube (13) is set as 0.05cm.