JPH09313453A - Studs / eyelets for biomedical electrodes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stud/eyelet which is for a biomedical electrode and which can reduce the force required to mount a conductor without weakening the force to remove the conductor from the electrode. SOLUTION: A stud/eyelet 10 is equipped with a base 12, a neck 14, and a head 16 having a slot 18. The head 16 is deformed with increase in the width or depth of the slot 18 to cause drop of the force required to close the slot 18. This reduces the force for mounting a conductor leading from a biomedical apparatus on the stud/eyelet 10. It is also possible to adopt a slot extending in crossing in a Y-form or X-form.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to studs / eyelets for biomedical electrodes.

[0002]

BACKGROUND OF THE INVENTION Stud / eyelet type biomedical monitoring electrodes generally include a pressure sensitive adhesive to secure the electrodes to the skin and an electronically conductive eyelet surface that is a flat disk-shaped component with the skin. And a support coated with an ion conductive gel (or an adhesive) bridging between and. A strut or stud is attached to the eyelet. Studs typically project through the support and are used to facilitate the electrical connection between the electrodes and the electrocardiograph instrument.

The stud and eyelet component (referred to herein as the stud / eyelet) can take two different forms. The first form is a "single piece" construction in which the stud and eyelet are integrally molded and the stud portion is inserted through the support of the electrode. The second form is a "two-piece" construction in which the studs and eyelets are placed one above the other through the support during the electrode manufacturing process and mechanically assembled together.

For some applications, it is desirable that the stud / eyelet be "radiotransparent", that is, it will not obscure the fluoroscopy of the tissue below the stud / eyelet. To achieve radiopacity, the use of metal is avoided for the studs / eyelets, and carbon-containing conductive plastics or plastic parts coated with a thin layer of conductive metal are used.

Carbon-filled plastics are expensive to use as electrodes, resulting in a material cost of about 1 cent for every 0.2 grams of electrodes used in certain single piece constructions. Therefore, it is desirable to reduce the use of materials. In use, a lead from a biomedical device is usually attached to the electrode, which is placed in place on the patient's body. The attachment of leads generally requires the application of a considerable amount of force to the body, resulting in discomfort to the patient, possibly suffering from illness or distress that requires medical attention.

[0006]

When the wire is passed over the stud / eyelet head, a certain force is required to separate the springs of the wire. Therefore, a strategy that reduces the force required to attach the lead while not compromising the force to remove the lead from the electrode is beneficial to the patient and attending clinician. The object of the present invention is to provide such a strategy.

[0007]

To achieve the above object, the present invention according to claim 1 comprises a base, a neck connected to the base, and a head connected to the neck. A stud / eyelet for a biomedical electrode, characterized in that it is provided with a slot.

According to a second aspect of the present invention, in the stud / eyelet according to the first aspect, the slot is 90 °.
Providing studs / eyelets that flex and extend at an angle of ~ 180 °. The present invention according to claim 3 provides the stud / eyelet according to claim 1 or 2, wherein the slot has a width of 0.5 mm to 1.8 mm and a depth of 1.7 mm to 3.3 mm. And the head are interconnected at an angle of 8 ° to 90 ° to provide a stud / eyelet in which the base, neck and head are formed from a radiolucent conductive plastic.

According to a fourth aspect of the present invention, there is provided an insulating support having a hole, a stud / eyelet according to any one of the first to third aspects extending through the hole, and a base. A biomedical electrode comprising: a conductive adhesive base material. The stud / eyelet according to one embodiment of the present invention having one or more slots in the head reduces the force required to attach the conductor to the electrode.

The conventional studs / eyelets without slots are rigid, while the studs / eyelets of the present invention are rigid.
The head of the eyelet flexes like a spring. The stud / eyelet flexure reduces the amount of strain on the wire springs and reduces the force required for mechanical connection. According to another embodiment of the present invention, accidental disconnection of the wire from the stud / eyelet is prevented. The angle between the neck and the head is reduced in order to maintain the force required to remove the conductor. Conventionally, this angle has generally exceeded 90 °. By reducing this angle, the present invention increases the frictional force required to remove the conductors and, as a result, is the same as was present before the stud / eyelet was modified as described above for patient comfort. Maintains a similar wire pullout force.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the accompanying drawings. FIG. 1 shows a stud / eyelet 10 according to a first embodiment of the present invention. Stud / eyelet 10 is base 1
2, a head 14 having a neck 14 and a slot 18.
With. The slot 18 bisects the head 16 and can be referred to as a 180 ° slot.
FIG. 2 is a plan view of the stud / eyelet 10 showing the 180 ° slots 18 more clearly.

FIG. 3 shows a stud / eyelet 30 according to a second embodiment of the present invention. Stud / eyelet 3
0 is a base 32, a neck 34, and a Y-shaped slot 3
And a head 36 having eight. The slot 38 divides the head 36 into three equal parts and can be referred to as a 120 ° slot. FIG. 4 is a plan view of the stud / eyelet 30 showing the 120 ° slots 38 more clearly.

FIG. 5 shows a stud / eyelet 50 according to a third embodiment of the present invention. Stud / eyelet 5
0 is a base 52, a neck 54, and an X-shaped slot 5
And a head 56 having eight. The slot 58 divides the head 56 into four equal parts and can be referred to as a 90 ° slot. FIG. 6 is a plan view of the stud / eyelet 50 showing the 90 ° slots 58 more clearly.

As the width of the slots 18, 38, 58 increases, the force required to close the slots 18, 38, 58 decreases. Thus, the force to attach the leads from the biomedical device is reduced. Slots 18, 38, 5
The width of 8 is, for example, in the range of about 0.5 mm to about 1.8 mm, preferably about 0.7 mm to about 1.6 mm. As the depth of slots 18, 38, 58 increases, the force required to close slots 18, 38, 58 decreases. Thus, the force to attach the leads from the biomedical device is reduced. The depth of slots 18, 38, 58 ranges, for example, from about 1.7 mm to about 3.3 mm, preferably from about 1.8 mm to about 3.0 mm.

The embodiment of FIG. 5 is preferred over the embodiments of FIGS. Each stud / eyelet 1
In the heads 16, 36, 56 of 0, 30, 50, the number of branches of the slots 18, 38, 58 increases in this order, so that the symmetry angle of each slot is 180 °, 120 °, 9
A reduction of 0 ° reduces the orientation needed to mechanically connect the stud / eyelet to a standard connector mounted on the conductor, with the reduction in force according to the invention.

Although three embodiments have been described with three different symmetry angles, the invention is not limited to these embodiments. Any form of slot in the stud / eyelet head that can reduce mounting forces is included in the inventive concept. The present invention further includes a stud / eyelet neck (eg, each neck 14, 34, 54) and a head (eg, each head 1), as shown in a comparison between the embodiment of FIG. 7 and the embodiment of FIG.
6, 36, 56) can be varied. Preferably, the stud / eyelet neck (eg, each neck 14, 34, 54) and head (eg, each head 16, 36, 56) are shown as shown by comparison of angle A in FIG. 7 and angle B in FIG. The angle between and increases from about 8 ° to about 90 °. The increased angle between the neck and the head in each embodiment increases the friction force initially required to remove the wire from about 1.0 kg to about 1.8 kg. As a result, the same or similar wire pullout forces that existed before the stud / eyelet were modified as described above for patient comfort are maintained.

The studs / eyelets according to the invention can be used for various purposes in biomedical electrodes, in particular in the form of electrodes which are fixed to the patient before connecting the lead to the biomedical device. The structure of a typical biomedical electrode is shown in cross section in FIG. The electrode 70 comprises an insulative support 72 having a hole 73 through which a stud / eyelet 74 extends through and projects into an electrical connection to a biomedical device. A conductive adhesive field 76 is disposed over the stud / eyelet 74 and the support 72. A release paper 78 is placed to protect the ground 76 before use.

Support 72 can be formed of any suitable insulator structure such as those disclosed in US Pat. No. 5,012,810. The studs / eyelets 74 can be formed from plated plastic (eg, from silver-plated and chlorinated ABS plastic commercially available from Micron Products of Fittsburgh, Mass., Or Select Engineering of Fittsburgh, Mass.). Of known eyelets).

[Brief description of drawings]

FIG. 1 is a first part of the present invention having one slot in a head.
3 is a front view of a stud / eyelet according to an embodiment. FIG.

2 is a plan view of the stud / eyelet of FIG. 1. FIG.

FIG. 3 is a second part of the present invention having a Y-shaped slot in the head.
3 is a front view of a stud / eyelet according to an embodiment. FIG.

FIG. 4 is a plan view of the stud / eyelet of FIG.

FIG. 5 is a front view of a stud / eyelet according to a third embodiment of the present invention having two slots in the head that are orthogonal to each other.

FIG. 6 is a plan view of the stud / eyelet of FIG.

FIG. 7 is a front view of a stud / eyelet according to a fourth embodiment of the present invention.

FIG. 8 is a front view of a stud / eyelet according to a fifth embodiment of the present invention.

FIG. 9 is a cross-sectional view of a biomedical electrode using a stud / eyelet according to one embodiment of the present invention.

[Explanation of symbols]

 10, 30, 50, 74 ... Stud / eyelet 12, 32, 52 ... Base 14, 34, 54 ... Neck 16, 36, 56 ... Head 18, 38, 58 ... Slot 70 ... Electrode 72 ... Support 73 ... Hole 76 … Ground 78… Release paper

Claims (4)

[Claims] 1. A stud for a biomedical electrode comprising a base, a neck connected to the base, and a head connected to the neck, wherein the head is provided with a slot. Eyelet. 2. The stud / eyelet according to claim 1, wherein the slot extends by bending at an angle of 90 ° to 180 °. 3. The slot has a width of 0.5 mm to 1.8 mm and a depth of 1.7 mm to 3.3 mm, and the neck and the head form an angle of 8 ° to 90 °. A stud / eyelet according to claim 1 or 2, interconnected to each other, wherein the base, the neck and the head are formed from a radiolucent conductive plastic. 4. An insulative support having a hole, a stud / eyelet according to any one of claims 1 to 3 extending through the hole, and a conductive adhesive contacting the base. A biomedical electrode comprising a ground.