A kind of electrode fixes anchorTechnical field
The present invention relates to a kind of fixed anchor, particularly a kind of fixation anchor for et al. Ke fixed electrode.Belong to medical treatmentTechnique with the apparatus field.
Background technology
Spinal cord stimulation trial instrument is clinically commonly used for inhibition of pain, treatment spinal cord injury etc..Marrow stimulating electrodeBy stimulating spinal nerve to be treated, electrode needs to be fixed in spinal cord epidural space.In the prior art, electrode can pass throughThe modes such as grappling, stickup, fiber suture, bonding are fixed in the bone near stimulation location or surrounding tissue.Existing fixationAnchor is usually using structures such as overhead kick, spinous process, nails, and their shortcoming is that human spine peripheral nerve is very sensitive, if usingThe form of overhead kick, then the nerve of surrounding is formed it is prolonged stimulate, the patient for being implanted equipment may feel that and not relax veryClothes, so unsuitable by the way of hangnail around backbone.Many electrodes fixation anchors are employed tightens fixation with suturesThe mode of electrode, if this mode shortcoming is it is also obvious that fixed anchor is constituted for pure silicon colloid, general diameter of bore can not be than electricityPolar diameter is too many greatly, is otherwise not easy to tighten, because some viscosity of Silica Surface band, when placing fixed anchor with regard to relative difficulty.In binding link, reliability depends entirely on the feel of doctor, bundle is tightly easily damaged very much electrode, and the pine of bundle fixed effect is notIt is preferable.Because in the spatial operation of very little, in binding, operation is relatively also difficult.Also there is part to fix anchor and employ screw lockMode, but its clip design be not quite reasonable, discontinuity, fixed effect is unsatisfactory.To solve fixed anchor in the pastThese problems existed, we devise more practical fixation anchor, and have been many adaptation implantation human bodies and guarantor in shapeProtect the design of electrode.
The content of the invention
The present invention provides a kind of electrode and fixes anchor, including a holder, fixture and outer cover, and the holder is used to clampElectrode, the retaining element is used to holder being fixed on inside outer cover.
Further, holder can accommodate electrode by partial elastic deformation fastening under external force.
Further, holder include two clamping elements, elastic force deformation element, the elastic element two ends respectively with clampingElement is connected.
Further, retaining element is screw.
Further, in addition to a snap ring, the snap ring has a through hole, through-hole wall has coordinate with retaining element inScrew thread, snap ring is stuck in outside holder.
Further, there is a through hole, through-hole wall has the internal thread coordinated with retaining element, the folder on holderGripping member also includes a side arm, the side arm connection clamping element and through hole outer wall.
Further, the outer cover, which has, has at least one through hole at least one flank, flank.
Further, the outer cover has at least one groove.
Further, the material of the outer cover is the silicon rubber of implantation rank.
Further, the elastic force deformation element is U-shaped, and its material is TC4 titanium alloys.
Further, the material of the clamping element is TC4 titanium alloys or 316LVM stainless steels.
Further, there is a through hole, through-hole wall has the internal thread coordinated with retaining element, the folder on holderGripping member also includes a side arm, the side arm connection clamping element and through hole outer wall.
Further, the outer cover at least one end is elongated.
Further, the convexity of the outer cover upper and lower end face is different.
Brief description of the drawings
Fig. 1 is prior art spinal nerve electrode stimulating schematic diagram
Fig. 2 is the disassembly diagram of the embodiment of the present invention one
Fig. 3 is the assembling plan view of the embodiment of the present invention one
Fig. 4 is the assembling stereogram of the embodiment of the present invention one
Fig. 5 is the sandwich exploded view of the embodiment of the present invention one
Fig. 6 is the sandwich section figure of the embodiment of the present invention one
Fig. 7 is the sandwich part top view of the embodiment of the present invention one
Fig. 8 is the Snap ring structure side view of the embodiment of the present invention one
Fig. 9 is the Snap ring structure stereogram of the embodiment of the present invention one
Figure 10 is the fundamental diagram of the embodiment of the present invention one
Figure 11 is the use state figure of the embodiment of the present invention one
Figure 12 is the side view of the embodiment of the present invention one
Figure 13 is the assembling stereogram of the embodiment of the present invention two
Figure 14 is the assembling plan view of the embodiment of the present invention two
Figure 15 is the hold assembly sectional view of the embodiment of the present invention two
Figure 16 is the hold assembly stereogram of the embodiment of the present invention two
Figure 17 is the fundamental diagram of the embodiment of the present invention two
Embodiment
The reference title of embodiments of the invention one is as follows：
It is 1 electrode, 102 silica gel sheaths, 103 snap rings, 104 jackscrews, 105 sandwiches, 106 main bodys, 107 first grooves, 108 second recessedGroove, 109 first flanks, 110 second flanks, 111U types flexible structure, 112 semi-circular structures, 113 sandwich inner chambers, 114 screw thread mouths,115 snap ring inner chambers, 116 open slots, 117 through holes.
As shown in figure 1, electrode 1 can be placed in each nerve location of spinal cord carries out electro photoluminescence to nerve.Such as Fig. 2 institutesShow, electrode of the invention fixes anchor, and by sandwich 105, snap ring 103, jackscrew 104 and silica gel sheath 102, totally four parts are constituted.
As shown in figure 3, silica gel sheath 102 by the first flank 109, the second flank 110, the first groove 107, the second groove 108,Inner chamber and main part 106 are constituted, and its top surface has through hole 117.Wherein inner chamber can house snap ring 103 and jackscrew 104.FlankThere is through hole between main body, the sclerotin or surrounding tissue that silica gel sheath is fixed on to spinal cord are passed through for suture.Groove canFor binding sutures, the position of suture is preferably limited, so that the preferably position of fixed electrode.Through hole can attack M2Screw thread, can coordinate M2 flush ends holding screw to lock electrode.
Fig. 4 is assembling stereogram.
As shown in Figures 5 to 7, sandwich 105 is by two semi-circular structures 112, U-shaped flexible structure 111 and the structure of snap ring inner chamber 113Into.Two semicircular structure one end is connected with U-shaped flexible structure 111, and the two semicircular structure other end separates to be formed out under reset conditionMouthful.The material of U-shaped flexible structure sandwich be elasticity can shape-changing material, material has a biocompatibility, and to have preferableElasticity, it is not necessary to conductive, preferably titanium alloy, alternative material have stainless steel, Nitinol and platinumiridio.Two semicircular structureMaterial is preferably metal, for example：Titanium alloy, stainless steel, Nitinol and platinumiridio.U-shaped flexible structure sandwich and semicircle knotStructure material is identical or different, can be integrally formed during identical material.
As shown in Fig. 8 to Fig. 9, snap ring 103 is made up of snap ring inner chamber 115, open slot 116 and screwed hole 114.The material of snap ringExpect for metal.The internal thread of screwed hole 114 coordinates with the external screw thread of jackscrew 104.Snap ring 103 is removed to the locking mode of sandwich 105It can also be snap lock outside screw lock mode.
Snap ring 103 is enclosed on sandwich 105 during installation, and jackscrew 104 is on snap ring 103；Sandwich 105, snap ring 103 and jackscrew104 are all wrapped in inside silica gel sheath.
After electrode cable is passed through from the inner chamber of sandwich 105 during installation, by through hole 117, jackscrew is rotated with torque screwdriver104, jackscrew 104 is moved towards cavity direction in snap ring 103, the cross-sectional area for the inner chamber that jackscrew 104 is constituted with snap ring 103 subtractsSmall, so as to be compressed in sandwich 105 therein, elasticity change occurs under compression force for the U-shaped flexible structure 111 of sandwich 105Shape, makes two connected semi-circular structures 112 close to each other, and the cross-sectional area of the inner chamber 113 of two semi-circular structure formation subtractsSmall, so as to be compressed in electrode cable therein, such electrode is fixed anchor and has been secured on electrode cable.Then sutures are usedThrough the hole of the both wings 109,110 of silica gel sheath 102, electrode is fixed anchor and tied up on human body manadesma, thus electrode is secured.
Figure 11 is seen when electrode anchors are used, electrode fixes anchor and electrode 2 is fixed on to subcutaneous between skin 3 and muscle layer 4, electricityPole 2 penetrates skin 3.Electrode fixes anchor and can also set an elongated segment 5 to increase the stress that electrode bears bending.
As prioritization scheme as shown in figure 12, the one side 7 of electrode anchors skin-proximal can set raised smaller, and two press close toThe one side 8 of muscle will can set raised smaller, to have preferably laminating effect with surrounding tissue.
Embodiment two
Most setting of the present embodiment and embodiment is identical, the spy in the embodiment one do not repelled in every the present embodimentLevy and all may be used in the present embodiment.
As shown in figure 13, by hold assembly, jackscrew 204 and silica gel sheath 202, totally three parts are constituted electrode fixation anchor.
Wherein hold assembly is by two semi-circular structures 212, U-shaped flexible structure 211, cantilever arm as shown in Figure 15, Figure 16215 and snap ring inner chamber 213 constitute.Two semicircular structure one end is connected with U-shaped flexible structure 211, the two semicircular knot under reset conditionThe structure other end separates to form opening 216.The material of U-shaped flexible structure sandwich is that elasticity can shape-changing material, two semicircular structural materialPreferably metal, for example：Titanium alloy, stainless steel, Nitinol and platinumiridio.U-shaped flexible structure sandwich and semi-circular structure materialMaterial is identical or different, can be integrally formed during identical material.The material of snap ring is metal.The internal thread and jackscrew of screwed hole 214204 external screw thread coordinates.
As shown in figure 14, silica gel sheath 202 is by the first flank 209, the second flank 210, the first groove 207, the second groove208th, inner chamber and main part 206 are constituted.Its top surface has through hole 217.Wherein inner chamber can house snap ring 203 and jackscrew 204.There is through hole between flank and main body, the sclerotin or surrounding tissue that silica gel sheath is fixed on to spinal cord are passed through for suture.
As shown in figure 17, snap ring 203 is enclosed on sandwich 205 during installation, and jackscrew 204 is on snap ring 203；Sandwich 205, cardRing 203 and jackscrew 204 are all wrapped in inside silica gel sheath.
After electrode cable is passed through from the inner chamber of sandwich 205 during installation, by through hole 217, jackscrew is rotated with torque screwdriver204, jackscrew is moved towards cavity direction in snap ring 203, under the pressure effect of jackscrew, it is interior that jackscrew 204 and snap ring 203 are constitutedThe cross-sectional area of chamber reduces, so as to be compressed in sandwich 205 therein, the U-shaped flexible structure 211 of sandwich 205 is in compression masterpieceWith lower generation elastic deformation, make two connected semi-circular structures 212 close to each other, the inner chamber 213 of two semi-circular structure formationCross-sectional area reduce, so as to be compressed in electrode cable therein, such electrode is fixed anchor and has been secured on electrode cable.Then the hole of the both wings 209,210 of silica gel sheath 202 is passed through with sutures, electrode is fixed anchor and tied up on human body manadesma, thusElectrode is secured.