CN86104687A - Monitoring patient's disposable electrode - Google Patents

Abstract

A kind of being mainly used in is fixed on the patient skin, realization is to the disposable electrode of the noise-free signal detection of human body signal, this electrode comprises a carrier element (1), one side of carrier element (1) is equipped with one and electrically contacts head (3), opposite side has adhesive layer (5), the adhesive layer side forms to make and electrically contacts the front surface that head is attached to the carrier element of skin, wherein the adhesive layer (5) of the front surface of carrier element (1) has an opening part at least, is equipped with one in this opening part and is used for directly and the contacted carbon containing element of material (6) of carrier element (1).

Description

The present invention relates to a kind of being mainly used in and be fixed on the patient skin, realize disposable electrode that the noise-free signal from human body signal is detected.This electrode comprises a carrier element, and a side of carrier element is equipped with and electrically contacts head, and opposite side is equipped with adhesive layer, the adhesive layer side promptly become can make electrically contact head be attached to skin the front surface of carrier element.

For example in the EKG monitoring, generally use reusable electrode and disposable electrode.Disposable electrode has a little thin plate of being made by rigid plastics and being covered by silver or silver chloride usually.This little thin plate is assemblied in from adhering to the middle part of plastic plate and being recessed into wherein slightly.May be electrically connected between electrode and monitor or the oscillograph in order to make, silver thin plate then is connected with cable or Metal Contact head.Before being added on electrode on the skin, fill up silver plate place recess with the conduction electrolytic gel.The electrode of some type is and adds good electrolytic gel and together supply on the market.Silver or silver chloride are used for obtaining the hypopolarization current potential, and the effect of gel then is electrode to be leaned against on the skin float the noise when also having avoided patient motion thus in the signal transmission.Need very carefully when applying gel, too many gel can cause that gel is floating and go out the electrode surface that covers with adhesive agent, thereby reduces the adhesive force of electrode, cause electrode to place patient skin after, easily get loose; Gel can make the poor electric contact of electrode again very little the time.The essential given accurate dose of the various types of electrodes of crossing with Gel Treatment, and because gel can dry up in time or go bad and need the storage time of qualification gel.

Take this electrode that is easy to use to come human body signal is realized that noise-free signal detects, it is crucial that the electrode pair human body has good adhesive ability, otherwise the transition of impedance is prone to noise during owing to patient motion.The different electrodes of the usefulness of this purpose of many confessions can have been bought on market, and may give announcement by a large amount of electrodes in patent documentation.For example, an electrode device is in US Patent specification 3,911, announces in 906.This electrode device includes an adhesive layer that is added on the carrier element, and this carrier element layer relies on the carbon dust conduction that is blended in wherein.The Metal Contact head places the middle part of circular electrode, and exactly this need follow closely solid operation device and gets on.This contact mainly is made of neck shape parts, and this neck shape component top has the end of an amplification, and supplies the usefulness of the medical cable of connection standard.Kind electrode has many drawbacks, comprising, because of the impedance meeting changes with moving on skin, the conductive attach layer can not provide the complete noise-free signal to skin to detect, and owing to contact head must be followed closely admittedly, so the cost of electrode is higher.

Main purpose of the present invention provides the disposable electrode of more than one electrode type of introducing.This electrode design is simple, and application is rapid and good electrical contact can be provided.Another purpose of the present invention is that electrode can cheap produce and can store in long-time.The present invention has realized these purposes, and its method is: the front surface adhesive layer of carrier element has an opening part at least, is added with a carbon containing element that directly contacts with the carrier element material in opening part.

Characteristics of the present invention are: the carbon containing element is a weaving carbon fiber sheet.

Another feature of the present invention is: carrier element and electrically contact head mould built in same the conduction or semiconductive material in.

Hereinafter further describe the present invention with reference to accompanying drawing.

Figure 1 shows that the top oblique view of disposable electrode of the present invention.

Figure 2 shows that the side cross-sectional view of disposable electrode.

Fig. 3 is the plan view of explanation disposable electrode front surface of the present invention.

Fig. 1 is the oblique view at the top of disposable electrode of the present invention.The flat carrier element (1) of electrode and electrically contact head (3) and be made on same conduction or the semiconductive material, and form by the polyethylene mold pressing that is mixed with carbon.If make conductive material, just avoided the interference polarization effect in the material with carbon.Phosphorus content depends on the type of employed carbon in addition, generally accounts for 40-45%.

The carrier element of electrode (1) is circular substantially, and around its outer wide thin and flexible seat rings (4) that is with, in the middle, part 2 exceeds a little.Carrier element (1) downside has the adhesive layer (5) as contact surface or front surface, adhesive layer is used for electrodes in patient skin, adhesive layer have one for example diameter be the circular open place of the no adhesive layer of 12mm, contact element (being thin plate (6)) is installed in the border circular areas with a kind of like this method: make the edge of thin plate (6) and adhesive layer overlapping a little and be fixed on the adhesive layer thus and place the appropriate location.In addition, the other method of splint fixation (6) be with its fusing or sintering on the front surface of carrier element.Formation preferably is made up of the textile with high-intensity activated carbon fiber against the thin plate (6) of the contact surface of patient skin, for example available known by Britain SIEBE GORMAN(SIEBE GORMAN, England) the activated carbon yarn fabric of Sheng Chaning, every square centimeter of length that can reach several kms of this activated carbon fiber, and from helping the ion migration between patient skin and the carrier element in essence.The fibre end such as the brush of this fabric stretch out from fabric, compare with for example silver layer, because fibrous termination passes the thin layer that covers a large amount of active carbon particles, these fibre ends can obtain and the contacting of the carbon particle of bigger quantity, thereby can reduce surface impedance greatly.Compare with using pure sheet plastic, transient impedance approximately can reduce by ten times.

Use another kind of method, carbon containing thin plate (6) can and/or become the carbon crystal of yarn fabric and/or rigid form to constitute by binding agent with carbon fiber mixture or gel.

For shield electrode is adhered to not wishing of preventing to produce, the protection sheet (not being illustrated) in a hole is arranged with its middle part in memory period.

For strengthen and patient skin between conductive capability, the front surface that make electrode is for example got wet in the basin that is placed with the moistening yarn fabric that contains normal saline or analog, for the purpose of effectively, the concentration of normal saline can be up to 15%, but gets 8-10% for better.Thin plate (6) is absorbent solution soon, and protection sheet is taken away, and just can use electrode.

Also can alternatively make carbon containing thin plate (6) have the composition of dried salt, this dried salt was just in time soaked before electrode places on the skin, and may be moistening by the natural moisture content of human body liquid or human body institute.

Because do not use metal, so produce very simply, expense is lower, and if electrode store with being dried, can in for a long time, without damage store.

On the top side of the middle body (2) that electrode exceeds, be equipped with and electrically contact head (3), electrically contact head (3) and comprise cervical region (7), and the top of widening 8 is arranged on its top.The diameter at top 8 is 4mm, and the diameter of cervical region (7) is wanted thin 0.2mm.Contact head (3) is applicable to the general international standard condition, is used as the contact head (not shown go out) of medical cable usually.

The present invention is not limited to embodiment described above certainly. In the claim scope, might make many changes, so may come production electrode of the present invention with other design or size, for example the diameter of electrode middle body (2) can design smaller or greaterly, and can be with the method for the effective diameter of selecting electrode so that electrode reaches better performance and electric conductivity. In so-called EKG monitoring manipulator (Work-EKG-Monitoring), electrode is than being vulnerable under normal conditions bigger mechanical deformation power. In these cases, be suitable for using the electrode of bigger attaching surface and/or contact surface. So might become its downside to electrode design with long band or the similar electrode of a carbon fiber yarn fabric, carrier element of the present invention supplies the usefulness that is connected with medical cable.

The electrical connection of electrode also can design with additive method naturally, and for example general medical cable is the plug of 4mm with diameter, and electrode is with a socket (not being illustrated) that is molded in it on same material thus.

Claims (9)

1, a kind of easy-operating electrode, it is mainly used in and is fixed on the patient skin, to realize to noise-free signal detection from human body signal, it comprises a carrier element (1), one side of carrier element (1) has an electrical contact (3), and its opposite side has adhesive layer (5), and this adhesive layer side forms to make and electrically contacts the front surface that head is attached to the carrier element of skin

It is characterized in that the front surface adhesive layer (5) of carrier element (1) has at least one opening part, in opening part, be added with a carbon containing element (6) that directly contacts with the material of carrier element (1).

2, as the desired a kind of disposable electrode of claim 1, it is characterized in that: carbon containing element (6) is a weaving carbon fiber sheet.

3, as claim 1 or 2 desired a kind of disposable electrodes, it is characterized in that carbon containing element (6) is fixed on the carrier element (1) at least in part.

As one of any desired a kind of disposable electrode in the above-mentioned claim, it is characterized in that 4, carbon containing element (6) has slightly the size greater than above-mentioned adhesive layer central opening place, and has overlapping slightly with the opening part inward flange.

5, as the desired a kind of easy-operating electrode of claim 1, it is characterized in that: carbon containing element (6) is binding agent/gel mixture, and this mixture has into the carbon fiber of weaving or hard form and/or the mixture of carbon crystal.

6, as the desired a kind of disposable electrode of claim 1, it is characterized in that, carrier element (1) and electrically contact the head (3) be molded in one the conduction or semiconductive material on.

7, as the desired a kind of disposable electrode of claim 6, it is characterized in that: the conduction or the semiconductive material of carrier element (1) are made of the plastic material that is mixed with carbon.

8, as desired a kind of disposable electrode any in the above-mentioned claim, it is characterized in that: make carbon containing element (6) before being added to the zone that to use, be added with the saline solution that improves contact.

9, as one of any desired a kind of disposable electrode in the claim 1 to 8, it is characterized in that: carbon containing element (6) has before it is added to the zone that will use or when it is added to use regional, is used for being soaked wet dried salt.

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