CN213640897U

CN213640897U - Double-wire electrode

Info

Publication number: CN213640897U
Application number: CN202021638498.1U
Authority: CN
Inventors: 张珊珊; 黄翔; 王楚怀; 李乐; 李婷婷
Original assignee: First Affiliated Hospital of Sun Yat Sen University
Current assignee: First Affiliated Hospital of Sun Yat Sen University
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-07-09
Anticipated expiration: 2030-08-07

Abstract

The utility model discloses a double-wire electrode, the diameter of which is 0.16mm, and the material is platinum wire, stainless steel or platinum-iridium alloy; the conductive part at the front end of the electrode is 3mm or 5mm long, is in a hook shape and is used for hooking the detected muscle to avoid electrode displacement caused by continuous contraction of the muscle; intermediate insulation; the tail end conducting part is 20mm to 30mm long and is connected with an electromyograph through an alligator clip. The front end and the middle insulation part of the wire electrode are sleeved with a needle catheter, and scale marks are arranged on the needle catheter and used for judging the needle insertion depth and the length change of the wire electrode during needle withdrawal; the conductive part at the tail end and the outer side of the needle catheter are respectively sleeved with a plastic sleeve and are fixed by a connecting piece. The utility model provides a two recording electrode are led into through disposable, and the painful sense of muscle that produces when reducing the signal collection to accurate record is to single target muscle, especially the sufficient flesh electrical data of deep muscle, improves the rate of accuracy of muscle function activity condition analysis result, has overcome the limitation that current electrode was used.

Description

Double-wire electrode

Technical Field

The utility model relates to a measuring equipment technical field especially relates to a double-filament electrode.

Background

Two types of electromyography commonly used in clinic at present are needle electrode electromyography and surface electromyography, which amplify, record and convert weak potential differences generated during muscle fiber contraction into digital signals for analysis so as to reflect the functional status of neuromuscular function. The former usually adopts a disposable single concentric needle electrode when acquiring signals, but the adoption of the electrode often has the following problems: firstly, the muscle with a shallow layer and a large distribution range is difficult to locate, and the locating method has limitations; secondly, because the needle electrode is thick, obvious pain is generated when muscles relax and when the muscles contract to collect bioelectricity; thirdly, the single concentric circular needle electrode is mostly surrounded by insulating substances, and only the needle tip part can conduct electricity, so that the recording area is small, and sufficient myoelectric signals are difficult to collect to reflect the function condition of the detected muscle. When the latter collects signals, because the surface electrode is adopted, the electrical signal change of the surface muscle can be recorded usually, and the myoelectric activity of the single target deep muscle cannot be recorded; meanwhile, the surface electrode records the potentials of all discharged movement units under the electrode, the potentials can be the electric signals of single superficial layer muscles and the sum of the myoelectric reactions of the detected muscle groups, and the collected myoelectric is easily interfered by the electric signals of surrounding muscles, so that the accuracy of the inspection result can be influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two wire electrodes, can enough once only lead into two accurate records of record electrode to single target muscle, especially the abundant flesh electrical data of deep muscle, can avoid the misery of two times acupuncture of same part again, and wire electrode softness hardly arouses pain when muscle contracts in the inspection process, alleviate the painful sense of pain and the feared psychology that the patient examined, the accurate reliable analysis of supplementary muscle function activity condition, improve the rate of accuracy of analysis result, the limitation that current electrode was used has been overcome.

In order to overcome the defect among the above-mentioned prior art, the embodiment of the utility model provides a gather two silk electrodes of flesh electricity, include:

the wire electrode is 0.16mm in diameter and comprises a front end conductive part, a tail end conductive part and a middle insulating part; the front end conductive part is in a hook shape, and the conductive length is 3 mm; the length of the terminal conductive part ranges from 20mm to 30 mm;

the needle catheter is arranged on the outer sides of the front end conducting part and the middle insulating part and used for guiding two recording electrodes at one time to acquire data.

Further, the wire electrode is any one of a platinum wire electrode, a stainless wire electrode or a platinum-iridium alloy electrode.

Further, the bifilar electrode further comprises: the plastic sleeves are respectively wrapped on the conductive part at the tail end of the wire electrode and the outer side of the needle catheter, and the connecting piece is used for fixing the two plastic sleeves; wherein, the plastic sleeve is provided with scale marks for positioning the acquisition part before needle insertion.

Furthermore, each wire electrode can move in the needle catheter and generate displacement difference in the range of 0.5cm to 1cm so as to detect action potentials of two sites of detected muscles, and data of the two recording electrodes are mutually referenced, so that the accuracy and the reliability of detected data are improved.

Further, the length of the double-wire electrode can be selected according to the measured muscle depth and can be any one of three specifications of 8cm, 10cm and 15 cm.

Furthermore, the needle catheter is provided with scale marks for judging the needle insertion depth and assisting in judging the length change of the wire electrode during needle withdrawal.

Further, the length of the needle catheter is selectable according to the anatomical position and the morphological structure of the measured muscle, and the needle catheter comprises specifications of 50cm and 60 cm.

Further, the diameter of the needle catheter includes both 0.3mm and 0.5mm gauge.

Furthermore, the tail end conducting part of the double-wire electrode is used for being connected with an electromyographic signal collector of a surface electromyogram or a needle electrode electromyogram through an alligator clamp electrode wire.

Compared with the prior art, the embodiment of the utility model adopts the double-wire electrode as the recording electrode, two recording electrodes can be introduced at one time to accurately record enough myoelectric data of a single target, especially deep muscles, and the double-wire electrode can move 0.5-1cm in the needle catheter so that the two recording electrodes can detect action potentials of two sites of the detected muscles, the myoelectric data collected by the two recording electrodes are used as reference, and the left side and the right side of the same muscle are simultaneously detected and compared, thus more myoelectric signals can be detected to carry out data statistics processing and more parameter analysis, the functional activity condition analysis of the detected deep muscles and small muscles can be objectively and accurately reflected, the pain feeling when pricking the skin is reduced by reducing the diameter of the needle body, the fear of the checked person is reduced, and the defect that the surface electrode is easily interfered by electric signals of surrounding muscles when collecting the potentials is overcome, the accuracy of the measurement results is improved.

Drawings

Fig. 1 is a schematic structural diagram of a twin-wire electrode according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a bifilar electrode according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, in one embodiment of the present invention, a twin-wire electrode 100 is provided, including:

a pair of wire electrodes; the wire electrode is 0.16mm in diameter and comprises a front end conductive part 10, a tail end conductive part 30 and an intermediate insulating part 20; the double-wire electrode adopts a needle catheter, two recording electrodes can be introduced at one time to accurately record enough myoelectric data of a single target, particularly deep muscles, the double-wire electrode can move 0.5-1cm in the needle catheter so that the two wire electrodes can detect action potentials of two sites of detected muscles, the myoelectric data acquired by the two recording electrodes are mutually used as reference, and the left side and the right side of the same muscle are simultaneously detected and compared, so that the accuracy and the reliability of detection data are improved.

The front end conductive part 10 is in a hook shape, can hook the detected muscle to avoid the influence of electrode displacement or slipping out caused by continuous contraction of the muscle on the detection result, and has the conductive length of 3 mm; the length of the terminal conductive part 30 ranges from 20mm to 30 mm.

In this embodiment, it should be noted that the wire electrode has a diameter of only 0.16mm, and since it is extremely small and flexible, the wire electrode hardly causes pain when the muscle contracts slightly and greatly under different actions, so that the anxiety and fear of the examinee can be relieved, the pain can be relieved obviously, the operability of the doctor is enhanced, the active coordination of the patient is improved, the examination time is shortened, and the diagnosis accuracy is improved.

Further, in the embodiment, the front end of the wire electrode is not insulated to conduct electricity to collect myoelectricity, the middle part of the wire electrode is completely insulated to avoid the myoelectricity interference of surface muscles, the tail end of the wire electrode is not insulated and has the conducting length of 20-30mm, and the wire electrode is connected with a myoelectricity signal collector of surface myoelectricity or needle electrode myoelectricity by adopting an alligator clip electrode wire. The fixed length of the conductive part at the front end of the wire electrode is 3mm or 5mm, the recording area is large, and more movement unit potential data can be collected for function analysis of the measured muscle; the recording area is accurately fixed, which is beneficial to establishing a uniform normal human myoelectricity reference standard, for example, the AEMG value of normal human brachial radial muscle reflecting muscle strength is 110 +/-10 muV through a large amount of data detection; and in the later stage, the muscle function activity conditions of patients with skeletal muscle pain and nervous system diseases can be analyzed according to the myoelectricity change characteristics during muscle movement so as to judge the neuromuscular injury condition, and the comparison curative effect can be judged according to the data before and after treatment and the function regression prediction can be obtained.

In addition, the front end of the wire electrode adopts a 'hook' mode, so that when measuring deep muscles with a shallower surface, such as brachial muscles, the depth of the deep muscles with the depth of about 1-1.5cm or deeper, such as deep multifidus muscles, about 3-5cm, the wire electrode can be hooked on the measured muscles, and the wire electrode can be prevented from moving or sliding out when the muscles are continuously contracted.

The embodiment of the utility model provides a two silk electrodes gather the electrode as the flesh electricity, can enough once only lead into two accurate records of record electrode to single target muscle, especially the abundant flesh electricity data of deep muscle, and two silk electrodes can remove 0.5-1cm in the needle pipe so that two silk electrodes can detect the action potential at two loci of detecting the muscle, the flesh electricity data of two record electrode collections are each other for referring to, again because silk electrode is tiny and pliability is good, can alleviate the painful sense and the fear psychology that the patient examined time measuring, the accurate reliable analysis of supplementary muscle function activity condition, the accuracy of analysis result is improved, the limitation that current electrode used has been overcome.

In an exemplary embodiment, the dual wire electrode 100 is provided as a platinum wire electrode, a stainless wire electrode, or a platinum-iridium alloy electrode. The three materials have the characteristics of low impedance and high sensitivity, so that the three materials have no influence on output pulse waves and medium and low frequency waves when acquiring signals.

In an exemplary embodiment of the present invention, the length of the double-wire electrode 100 is selected according to the measured muscle depth, and is any one of three specifications of 8cm, 10cm and 15cm, and is marked with different colors.

In an exemplary embodiment, a bifilar electrode 200 is also provided, as shown in fig. 2. The double-wire electrode 200 further comprises an acupuncture catheter 40, and the acupuncture catheter 40 is sleeved outside the front end conductive part and the middle insulating part of the wire electrode. The needle catheter 40 is provided with scale marks for judging the depth of the needle insertion.

Further, the length of the needle catheter 40 is selectable according to the anatomical position and the morphological structure of the measured muscle, and comprises two specifications of 50cm and 60 cm; and the diameter of the needle guide tube 40 includes both 0.3mm and 0.5mm specifications. Wherein each of the wire electrodes is movable within the needle catheter 40 and generates a displacement difference ranging from 0.5cm to 1 cm.

In this embodiment, it should be noted that the double-wire electrode 200 adopts two wire electrodes to be placed in one needle catheter 40, and two recording electrodes can be simultaneously introduced only by one needle insertion, so as to avoid obvious pain of the subject caused by repeatedly introducing the electrodes; and when the conductive portion of the needle reaches the muscle being measured (after the location is determined ultrasonically).

Wherein, the length of the needle catheter 40 is determined according to the anatomical position and the morphological structure of muscles, and has two specifications of 50cm and 60cm which are marked by different colors; the key point is that the needle catheter 40 is provided with scale marks, which is helpful for judging the depth of the needle insertion and also is helpful for judging the length of the intramuscular wire electrode in the withdrawal process of the needle catheter 40; the diameter of the needle catheter 40 is 0.3mm and 0.5mm, the small-diameter catheter can obviously relieve the pain of the needle head puncturing the skin, relieve the pain of the examinee and relieve the fear of the examination, and meanwhile, a layer of thick compound lidocaine ointment can be smeared on the surface of the skin at the electrode positioning position for local anesthesia, so that the pain of the needle head puncturing the skin is further relieved.

In addition, when the signals are collected, one wire electrode is selected to slightly retreat by 0.5-1cm, then the positions of the two wire electrodes are fixed and slowly retreat from the needle catheter 40 (the length of the external electrode wire is measured before retreat, the length of the external electrode wire is measured again after retreat, and the electrodes are ensured not to shift), so that the conductive parts of the two wire electrodes are positioned on different positions of the same muscle, namely two recording electrodes, the electromyographic data results detected by the two recording electrodes are mutually referenced, and the electromyographic data are collected and compared on the left side and the right side at the same time.

As shown in fig. 2, in an exemplary embodiment, the dual-wire electrode 200 further includes: the plastic sleeve 50 is respectively wrapped on the conductive part at the tail end of the wire electrode and the outer side of the needle catheter, and the connecting piece 60 is used for fixing the two plastic sleeves, and the plastic sleeves are provided with scale marks and used for further determining the collection part before needle insertion.

In this embodiment, it should be noted that the electrode 200 is protected by two independent plastic sleeves 50, and the tail of the needle catheter is used as a fixing point, which is usually the middle point of the total length of the electrode 200; one plastic sleeve is used for carrying out aseptic protection on the needle catheter, and the other plastic sleeve is used for carrying out aseptic protection on the wire electrode which exceeds the needle catheter, so that an inspector can be ensured not to pollute the wire electrode which exceeds the catheter when the needle catheter pierces the skin and enters appointed muscles, and the standardization of the electrode and the maintenance of an aseptic environment are ensured.

In an exemplary embodiment, the conductive portion of the end of the electrode 100 is connected to a surface electromyogram or needle electrode electromyogram signal collector via a crocodile clip electrode wire.

In this embodiment, it should be noted that, the conductive part at the tail end of the twin-wire electrode 100 is connected with the electromyographic signal collector by using crocodile clip electrode wires, a single muscle needs 3 electrode connecting wires, and two sides of the same muscle simultaneously detect 6 crocodile clip electrode wires; the crocodile clip is made of stainless steel, the conductor of the lead is made of silver foil wire, the diameter of the conductor is about 1.6mm, and the conductor has different colors (red, yellow, green, white, and the like); when electrical signals of a plurality of muscles are detected simultaneously, the colors of the conducting wires can be used as a method for distinguishing different muscles, and the method is simple and clear and is easy to operate.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. A double-wire electrode is characterized by comprising a pair of wire electrodes and a needle catheter;

2. The twin wire electrode of claim 1, wherein the wire electrode is any one of a platinum wire electrode, a stainless wire electrode, or a platinum-iridium alloy electrode.

3. The bifilar electrode of claim 1, further comprising: the plastic sleeves are respectively wrapped on the conductive part at the tail end of the wire electrode and the outer side of the needle catheter, and the connecting piece is used for fixing the two plastic sleeves; wherein, the plastic sleeve is provided with scale marks for positioning the acquisition part before needle insertion.

4. The bifilar electrode as claimed in claim 1, wherein each of the filar electrodes is movable within the needle catheter and produces a displacement difference in the range of 0.5cm to 1cm for detection of action potentials at two sites of the muscle being detected.

5. The bifilar electrode of claim 1, wherein the length of the electrode is selectable according to the measured muscle depth, to be any one of three gauges of 8cm, 10cm and 15 cm.

6. The electrode of claim 1, wherein the needle catheter has graduation marks for judging the depth of needle insertion and for assisting in judging the length change of the wire electrode during needle withdrawal.

7. The bifilar electrode of claim 1, wherein the length of the catheter is selectable according to anatomical location and morphology of the muscle being measured, including both 50cm and 60cm gauge.

8. The bifilar electrode of claim 1, wherein the diameter of the catheter comprises both 0.3mm and 0.5mm gauge.

9. The twin wire electrode according to claim 1, wherein the distal conducting portion is adapted to be connected to a surface electromyography or needle electrode electromyography collector via alligator clip electrode wires.