DE1961856A1 - Injection needle with built-in electrode or electrodes - Google Patents

Description

Ii- ₀ '-i;.: Tion wheel ₁ needle with built-in electrode or built-in

The ^ rfinuun ^ relates to an injection needle with a built-in electrode or built-in electrodes, which is used or. serve to exercise an electric one .n iteiz on a patient _{or the like}

ljl <-; - .. 'ide: bzv /. Electrode &eia'ati of the invention can be found in Veroir.'iu'.ij. iait one in our application (/ ;. o ^ rubbed elentriGohen localizer bzvy. btimu; .ator : * o: iL'j eintsr aer injection..anritze associated device / '. r.vüna': ti .Vi

Y, Uh ' Arj.' / Fi / iauj- ^ iborei.oi'i aer invention int al. ^ O the 'Ji ^; rurgL'j, // υ ijioii for ¹ (iinerj Oii.Lrur ^ (or Anäotiioui • i. ■; Aufg-Mbö i; divides, ο ine under the skin bz //. untur "i ': iiHU (i' : \: \ 'i:> I'ft t Ί ⁽ ; ίΛιΗϊι 1 i'j.' / jnde ijeri; .orii; ohu o'itjr iiii .- ';.-.' ί li'ic / oiif ¹ ! , ';Γ; -: ij l dkai L; jioren, an.johl ieuorid die t.or i': i, i ': \: if: c (uiibof Auwondui. ■■. Υΐ'jK trLi-itjhör HoL' au) too

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identify and finally "treat by injecting a certain drug"

So far, the localization and identification of a special nerve fiber or a special G-web is and the subsequent treatment of the fiber or the tissue by injection in separate and independent work.

The advantage of the invention over previous techniques is that it uses an injection needle which has at least two electrode elements, which can be connected separately to a power source, whereby one of the two electrodes ,, namely the inner, a hollow, tubular electrode that attaches to the syringe accessory can be connected, while the other of the two electrodes, namely the outer, a hollow one tubular electrode is, »velche of the. inner Electrode is electrically isolated.

Further, .separate electrodes can be placed in the., Isolated 2Ό space between the inner and outer electrodes attached and separated, e.g. on electrical recorders, be connected «,

A needle according to an embodiment of the Invention has two coaxially arranged electrodes, each of which is made of rustproof ü-taiil, cylindrical tubes are provided, 'of which uit- iunere has an extension piece at the upper end, ml υ whose help, -in a normato way, connect to one -Accessory part of the injection syringe lu> .i \ Bt; bei = t vird.

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The inner electrode has more or less the see '-, lir ^ r conventional hypodermic needle.

The outer electrode is coaxially separated from the inner one Electrode placed and used by cleser all over the place LQige constantly using a suitable insulating material ν, Q kept separate. The outer electrode "also points to the an extension piece on the upper end. .

The an;: atzstiic ": e of the inner and outer electrodes can separated by flexible cables to a power source, like: - '. 3. -3 in electronic locating device or

A heater can be connected ρ. - ™

The lower ends of the two electrodes run in eiiver ^ e- ¹ V: a β on en beveled plane (that is, the "o] .itze" the iiadel) and that of the inner and;> Au ^ Gnel'-. ·: Tro-ien at the "tip" covered area represents jie heating zone _o

An ALoC-cut icings of the outer electrode, and zv; ar aas ötüc ·. between the extension tube and the lower end, ai-ii iii a buccuse made of sterilizable, hardening JrlRfctikmaterial be encapsulated, which it the

Αηί-i. ^ T.jistün allowed to use the Ifedel while handling and g

Make sure you hold the seat device properly "The socket can" extend to the end piece of the uadel o'zv / o and encapsulate it to form a rope and be open to accommodate universal connector clamps for electrical cables. "

Dj e Auir-eiiOloktrode bzv /, whose exposed lower end, can i.; Be coated with a limaterial, which has a low heat coefficient, " V ₁ , ß. Polytetr ^ ifluoroethylene (PTFE) o

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The Uadel is used in such a way that it is first connected to an electronic locator "or stimulator and then inserted into a patient using well known techniques to precisely locate and identify a sensory or motor nerve fiber allows. Once a particular nerve fiber is located and identified a hypodermic syringe (keeping the needle in the patient) is attached to the Needle attached and drug injected. It exists but also the possibility of locating and identifying a particular one. Nerve fiber with, already previously attached syringe.

As soon as the needle is is connected to the localizer or stimulator, roughly the fiber of the iMerve to be determined from the outside pierce up to half of its presumed strength. Then the localizer or stimulator outgoing voltage is tuned to approximately 10 volts and the needle closer to the presumed position of the nerve, then an impulse is triggered by the localizer or stimulator in order to test the response to the stimulus.

As soon as the patient has shown a reaction, , 25 the voltage is reduced until no further reaction can be detected »The needle or electrode is then advanced again and. more tests will be done to determine the response to determine individual impulse stimuli. This process is repeated until it is possible

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cause a response to a pulse voltage of approximately a voltage amplitude. At this Point should be very irritating needle tip are close to the nerve that is being paralyzed, for example target. "'..-.

Once the nerve with sufficient accuracy has been localized, a locally effective anesthetic becomes on the way over the needle or electrode (which up to this point has only! function of a probe has fulfilled) injected, and only so much that no further reaction can be determined when stimulated or irritated »

The needle or electrode remains in its position as long as a further stimulation or physical one Examination is done to ensure that there is a satisfactory paralysis of the nerve given is. If paralyzed enough, it can usually reduce the motor response to irritation It can be determined that a voltage of approximately 10 YoIt is applied to the localized nerve.

The needle or electrode proves to be particularly advantageous when the dose of the locally acting anesthetic or other chemical agents is to be kept as low as possible in order to reduce the risk of medical counter-reactions to a minimum. Further advantages can be seen in the fact that nerves that are difficult to localize can be paralyzed, i.e. in particular deep-seated nerves or nerves that often change their anatomy one position, and further that specific nerve arms or fiber groups can be paralyzed, without affecting adjacent fibers .

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Of the. The idea of the invention allows the most diverse implementation possibilities to, some of them are shown in the attached drawing, namely show »

1 shows a view of the needle or electrode dismantled into individual parts ₍ of the injection syringe as well as of the electrical connections of the needle, for example electrode, "Pig") according to Pig. 1, FIG. 2A a view similar to FIG. 2 with a modified one

Needle or electrode shape,

3 shows a side view on an enlarged scale of the needle or electrode according to FIG. 1, where " ■ "with some (parts shown in cross-section

will,
4 shows a cross section of the needle or electrode

on the plane 4-4 according to FIGS. 3 and 5, a side view on an enlarged scale from another needle or electrode

shape, with some parts shown in cross-section.

The needle or electrode 10 according to FIG. 1 is fastened in a conventional manner by means of a holder to the lower end 11 of a device 12 constructed in the manner of an injection syringe. The needle or electrode 10 has two electrodes to which electrical connection terminals 13 with a U-profile are to be attached.

The connection terminals 13 are in turn connected via a two- stranded wire 14 e * '3 en output terminals "15 of a localization or «impulse-giving apparatus 16 to be connected ·

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The needle or electrode 10 has two coaxial Electrodes 17 and 18, each made of stainless Steel "consist.> '

The inner electrode 17 has at the upper end an attachment 19 (ie a fit), which enables the attachment of the device 12 constructed in the manner of a syringe, and a lower Uadelende 20 with a cavity 21. The inner electrode 17 thus has the appearance of a conventional Injektionssgrit- W ze. *. ■ ''

The outer electrode 18 is separated from the inner electrode 17 ' arranged coaxially separated and both electrodes are separated from one another with the aid of a suitable insulating material. The suitability of the insulating material. 22 hangs on the insulating properties of the low voltage used and on the resistance against sterilization temperatures or sterilization chemicals. One for this purpose as a Material deemed suitable xob spoxy resin.

The outer electrode also has an extension piece 24 at the upper end, which, see Pig. 1 and 3, the Extension 19 is similar to the inner electrode, and f

has a lower-seated Uadelende 25 with a smooth Outer surface on. The outer electrode 18 also has the appearance of a traditional hypodermic needle.

Attachment of the extension pieces 19 and 24 takes place each, because by means of an Exopy resin or with the help of a plastic material that hardens when exposed to heat.

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The needle ends Zp and 25 of the electrodes 17 and 18 run out in a common inclined plane, which represents the tip 26 of the needle, and the area which is covered at the tip by the inner and outer electrodes is a stimulus zone.

As can be partially seen in FIG. 2A, in the between the inner and outer electrodes 17 and 18 remaining free space made of fine wires electrodes 27 can be arranged. These electrodes 27 can be at one point with the help of a multi-core stranded wire . (not shown) between the extension pieces 19 and 24 of the inner and outer electrodes separately on a device (not shown) recording electrical impulses are connected,

The needle or electrode according to FIG. 5, in which the reference numerals according to FIGS. 1-4 have been retained, sits partly in a hollow body 28 made of sterile, Plastic material that hardens when exposed to heat. The body 28 extends for a major part of the Extension pieces 19 and 24 of the two electrodes and covers the E needle 25 approximately up to halfway.

In the hollow body openings 29 are provided for terminals, these openings being the contact sockets 30 of the respective extension pieces are assigned, in the elastic contact plugs (not shown) can be used.

In this embodiment, the needle or electrode can be attached to the type of a Syringe-built device 12 can be used as a probe «, '

The idea of the invention can of course be varied Changes to.

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Claims (1)

Pat entanspriiohes Injection needle, characterized in that it has at least two electrode elements (.20 and 25), each of which is connected to a power source (16) are to be connected, the inner (20) of the two electrodes being hollow, tubular Electrode is provided and to one of the injection syringe associated device (12) is to be connected while the outer (25) of the bath Electrodes is provided as a hollow, tubular electrode, which is from the inner electrode is electrically isolated. 2. Injection needle according to claim 1, characterized by that the inner and outer electrodes are arranged coaxially. 3. Injection syringe according to claim 1 and 2, characterized in that at least one further electrode (27) sits in the isolated space (22) between the inner and outer electrodes, which have to be connected to an external device is. 4. Injection syringe according to claim 3, characterized daduroh, that the or each additional electrode (27) is provided as a fine wire electrode » 5. Injection syringe according to claims 1-4, characterized by that the lower end, the so-called tip (26) both the inner and the auoh Outer electrode in a common Sohrägfläolie ends and the area covered by the Sohräg surface represents the irritation zone, 0098 30/1112 - to - Injection syringe according to claims 1-5, characterized in that that the inner (20) and the outer (25). Electrode at the top in an extension piece (17 or 18) and the extension piece of the inner electrode grips into that of the outer electrode, but from this is electrically isolated. · 7. Injection needle according to claims 1-6, characterized in that that the needle is partially covered by a hollow body (28) made of insulating material. 009830/1112 Blank page