CN102028523B - Ultrasonic transducer for orthopaedic surgery instrument - Google Patents
Ultrasonic transducer for orthopaedic surgery instrument Download PDFInfo
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Abstract
The invention discloses an ultrasonic transducer for an orthopaedic surgery instrument. The ultrasonic transducer comprises an amplitude transformer, piezoelectric ceramic and a main rod which are coaxially connected one another, wherein the amplitude transformer comprises a first circular table, a second circular table, an anti-rotation body and a working tip connecting rod which are coaxially connected with the piezoelectric ceramic; the working tip connecting rod comprises a first cone part, a second cone part, a first cylinder part and a second cylinder part in turn from one end close to the anti-rotation body; the diameter of each part decreases towards a work connection head in turn along the anti-rotation body; and the total length of the amplitude transformer is 34.5 to 36.5mm. Compared with the prior art, the ultrasonic transducer has the advantages that: matching property of the entire ultrasonic transducer is improved by improving the structure of the amplitude transformer, particularly optimizing the size of the structure of the amplitude transformer, so that the working efficiency of the ultrasonic transducer is greatly improved, and temperature rise on the surface of the transducer is greatly reduced while the efficiency is guaranteed.
Description
Technical field
The present invention relates to a kind of ultrasonic transducer, be specifically related to a kind of ultrasonic transducer that is used for the bone surgery appearance.
Background technology
The ultrasonic orthopedic surgery appearance is mainly used in oral surgery, sacrotomy, osteoplasty, fields such as surgery dissecting class operation.The ultrasonic orthopedic surgery appearance mainly is made up of main frame and handle; Wherein be installed in ultrasonic transducer in the handle and be an important building block; The existing ultrasonic transducer that is used for the ultrasonic orthopedic surgery appearance generally is made up of mobile jib, piezoelectric ceramics and horn; Like publication number is that the Chinese invention patent of CN1561919 discloses a kind of ultrasonic bone cutting device; Transducer described in this invention is made up of one group of longitudinal polarization piezoelectric patches and one group of shear-polarization piezoelectric patches, so that the vibration of cutter end is a complex vibration; Wherein adopt with the output energy and the size of the transducer in the handle, horn and cutter is optimized as optimization aim; The size range of the handle that obtains is: in the scope of resonant frequency 27～40KHz; Its transducer length is 20～60mm, and diameter is 8～30mm; Horn length is 12～30mm, and sidewall is made up of one of index shape, hyperbola, taper shape; The length of its knife bar is 15～40mm, and diameter is 3～25mm.Specifically note in its embodiment that handle is of a size of: in the scope of resonant frequency 27KHz, column part length is 42mm, and diameter is 5mm; Transition portion length is 19.5mm; The sidewall curve is an exponential type, and the length of knife bar is 30mm, and diameter is 8mm; Through above-mentioned optimal design, make the existing conventional ultrasound knife prodigiosin power of carrying load ability of ultrasonic cutter (tip) improve a lot.But the structure of this invention horn is to be that the cone of exponential type transits directly to long cylinder part by transducer through sidewall; Make this transducer in extensional vibration, also can produce oscillation crosswise; Because the orthopaedics Minimally Invasive Surgery need accurately be controlled otch, oscillation crosswise can runaway and cause patient to accidentally injure.In addition; This invention is not carried out the situation examination to the heating situation of transducer when working yet; Length range 20～the 60mm of transducer is excessive, and it is too fast under most of size, can to generate heat, the situation that temperature rise is too high; Thereby may cause the injury of tissue, and shorten the life-span of transducer.
Summary of the invention
The ultrasonic transducer that is used for the ultrasonic orthopedic surgery appearance of the low and high efficiency of surface temperature rise when the technical problem that the present invention will solve provides a kind of work.
The ultrasonic transducer that is used for the ultrasonic orthopedic surgery appearance of the present invention; The horn, piezoelectric ceramics and the mobile jib that comprise coaxial connection; Said horn comprise with coaxial first round platform that is connected of piezoelectric ceramics, with coaxial second round platform that is connected of first round platform, with coaxial anti-rotation kinetoplast that is connected of second round platform and the tip connecting rod that is connected with the anti-rotation kinetoplast, the total length of horn is 34.6～36.6mm.Through adopting said structure, particularly confirm the total length of horn, make transducer according to the invention reach superior matching performance, improved the work efficiency of transducer, the surface temperature when effectively reducing transducer work.
In the technique scheme; Said tip connecting rod begins to comprise successively at least one conical section, at least one cylinder part and a tip union joint from the end near the anti-rotation kinetoplast, and the diameter of each several part successively decreases towards the direction of tip union joint according to the anti-rotation kinetoplast successively.
Preferred tip connecting rod comprises two conical sections, two cylinder parts and a tip union joint.Described two two conical sections are respectively first conical section and second conical section, and wherein first conical section is between the anti-rotation kinetoplast and second conical section; Two cylinders partly are respectively first cylinder part and the second cylinder part, and wherein first cylinder part is between second conical section and second trunk portion branch.
The luffing pavilion physical dimension of the optimization the when total length of employing said structure and ultrasonic transducer is 34.6～36.6mm is:
The diameter of said first round platform is 9～11mm, and the distance of its upper surface to horn bottom face is 2～4mm;
The diameter of said second round platform is 7.5～9.5mm, and the distance of its upper surface to horn bottom face is 3～5mm;
Said anti-rotation kinetoplast is 6.5～8.5mm for just hexahedro prism, the spacing of its relative two faces, and the distance of this anti-rotation kinetoplast upper surface to horn bottom face is 8.9～10.9mm;
The distance of said first cone upper surface to the horn bottom face is 11.4～13.4mm; Its upper surface is connected with curved surface with the lower surface; This joint face sidewall is a curve, and radius of curvature is 3.5～6mm, and the diameter of the big end of said first cone is identical with the spacing of relative two faces of anti-rotation kinetoplast;
The distance of said second cone upper surface to the horn bottom face is 13.5～15.5mm; Its upper surface is connected with the inclined-plane with the lower surface; This joint face sidewall is a straight line; This straight line and the first conical section sidewall contact of a curve, the diameter of the big end of said second conical section is identical with the diameter of the first cone small end, and the diameter of its small end is identical with the diameter of first cylinder part;
The diameter of said first cylinder part is 4.3～5.8mm, and the distance of its upper surface to horn bottom face is 20.5～22.5mm;
The diameter of said second cylinder part is 4.0～5.3mm, and the distance of its upper surface to horn bottom face is 29.1～31.1mm.
Under the physical dimension of above-mentioned optimization, the external diameter of the mobile jib that cooperates with horn is identical with the diameter of horn first round platform, highly is 25～27mm, and the total length of mobile jib inside connecting rod is 46～48mm, and its upper surface exceeds mobile jib upper surface 13.5～15.5mm.
Optimized ultrasonic transducer horn total length is 35.6mm, and this moment, each spot size was following:
The diameter of said first round platform is 10mm, and the distance of its upper surface to horn bottom face is 3mm;
The diameter of said second round platform is 8.5mm, and the distance of its upper surface to horn bottom face is 4mm;
Said anti-rotation bulk phase is 7.0mm to the spacing of two faces, and the distance of the upper surface of this anti-rotation kinetoplast to horn bottom face is 9.9mm;
The distance of the upper surface of said first cone to horn bottom face is 12.4mm, and the radius of curvature of its upper surface and lower surface joint face sidewall curve is 4mm;
The distance of the upper surface of said second cone to horn bottom face is 14.5mm;
The diameter of said first cylinder part is 4.8mm, and the distance of its upper surface to horn bottom face is 21.5mm;
The diameter of said second cylinder part is 4.5mm, and the distance of its upper surface to horn bottom face is 30.1mm.
Under the horn physical dimension condition of above-mentioned optimum, the height of mobile jib is 26mm, and the total length of mobile jib inside connecting rod is 47mm, and its upper surface exceeds mobile jib upper surface 14.5mm.
Compared with prior art, the ultrasonic transducer that is used for the ultrasonic orthopedic surgery appearance according to the invention is through the improvement to the horn structure, especially to the optimization of horn physical dimension; To improve the matching of whole energy transducer; Thereby improve the work efficiency of ultrasonic transducer greatly, in guaranteed efficiency, significantly reduce the temperature rise of transducer face, shorten operating time; Avoid the patient is damaged, further improved the life-span of transducer.Simultaneously the anti-rotation body structure of just hexahedro prism makes transducer be installed in the handle firm, stable more, installs also simpler.
Description of drawings
Fig. 1 is a kind of embodiment that is used for the ultrasonic transducer of ultrasonic orthopedic surgery appearance according to the invention;
Fig. 2 is the enlarged drawing of horn in the embodiment shown in Figure 1.
Label is among the figure:
1 horn; 1-1 first round platform; 1-2 second round platform; 1-3 anti-rotation kinetoplast; 1-4 first conical section; 1-5 second conical section; The 1-6 first cylinder part; The 1-7 second cylinder part; 1-8 tip union joint; 2 piezoelectric ceramics; 3 mobile jibs; The 3-1 connecting rod.
The specific embodiment
As shown in Figure 1; The ultrasonic transducer that is used for the ultrasonic orthopedic surgery appearance of the present invention; The horn 1, piezoelectric ceramics 2 and the mobile jib 3 that comprise coaxial connection; Said horn 1 comprise with the piezoelectric ceramics 2 coaxial first round platform 1-1 that are connected, with the coaxial second round platform 1-2 that is connected of the first round platform 1-1, with coaxial anti-rotation kinetoplast 1-3 that is connected of the second round platform 1-2 and the tip connecting rod that is connected with anti-rotation kinetoplast 1-3; Said tip connecting rod begins to comprise successively the first conical section 1-4, the second conical section 1-5, the first cylinder part 1-6 and the second cylinder part 1-7 from the end near anti-rotation kinetoplast 1-3; The diameter of each several part successively decreases towards the direction of work union joint according to anti-rotation kinetoplast 1-3 successively, and the total length of horn 1 is 34.6～36.6mm, and this moment, each physical dimension of luffing pavilion was:
The diameter of the said first round platform 1-1 is 9～11mm, and the distance of its upper surface to horn 1 bottom face is 2～4mm;
The diameter of the said second round platform 1-2 is 7.5～9.5mm, and the distance of its upper surface to horn 1 bottom face is 3～5mm;
Said anti-rotation kinetoplast 1-3 is just hexahedro prism, and the spacing of its relative two faces is 6.5～8.5mm, and the distance of this anti-rotation kinetoplast 1-3 upper surface to horn 1 bottom face is 8.9～10.9mm;
The distance of said first cone upper surface to the horn, 1 bottom face is 11.4～13.4mm; Its upper surface is connected with curved surface with the lower surface; This joint face sidewall is a curve, and radius of curvature is 3.5～6mm, and the diameter of the big end of said first cone is identical with the spacing of relative two faces of anti-rotation kinetoplast 1-3;
The distance of said second cone upper surface to the horn, 1 bottom face is 13.5～15.5mm; Its upper surface is connected with the inclined-plane with the lower surface; This joint face sidewall is a straight line; This straight line and the first conical section 1-4 sidewall contact of a curve, the diameter of the big end of the said second conical section 1-5 is identical with the diameter of the first cone small end, and the diameter of its small end is identical with the diameter of the first cylinder part 1-6;
The diameter of the said first cylinder part 1-6 is 4.3～5.8mm, and the distance of its upper surface to horn 1 bottom face is 20.5～22.5mm;
The diameter of the said second cylinder part 1-7 is 4.0～5.3mm, and the distance of its upper surface to horn 1 bottom face is 29.1～31.1mm.
Horn 1 is under the said structure size; The external diameter of the mobile jib 3 that is mated is identical with the diameter of horn 1 first round platform 1-1; Highly be 25～27mm, the total length of mobile jib 3 inside connecting rod 3-1 is 46～48mm, and its upper surface exceeds mobile jib 3 upper surfaces 13.5～15.5mm.
Following applicant possesses high work efficiency and low temperature rise value with the ultrasonic transducer of description of test physical dimension according to the invention.
Experimental example:
1, skeleton perforate experiment
Transducer with physical dimension according to the invention is No. 1 transducer; On the basis of structure according to the invention, make transducer that size changes and be No. 4 transducers (concrete size respectively as follows) that 2, No. 3 transducers and structure are done to change slightly; Under the main frame condition all identical with other configuration; Be installed in following four different transducer on the inner fixture of bone surgery appearance handle respectively; Install handle casing, the tip of the Woodpecker board US2 type of producing with the applicant, the Woodpecker board UltraSurgery type osteotome machine of producing with the applicant is the experiment main frame; Be installed in corresponding foot switch on the main frame, the handle that divides four handles that four different transducers are installed is installed in main frame respectively through electric water route connecting line and makes an experiment.The bone surgery appearance that experimentizes after installation reference numeral respectively is No. 1, No. 2, No. 3 and No. 4.
Wherein:
No. 1 transducer: the horn 1, piezoelectric ceramics 2 and the mobile jib 3 that comprise coaxial connection; Said horn 1 comprise with the piezoelectric ceramics 2 coaxial first round platform 1-1 that are connected, with the coaxial second round platform 1-2 that is connected of the first round platform 1-1, with coaxial just hexahedro prism anti-rotation kinetoplast 1-3 that is connected of the second round platform 1-2 and the tip connecting rod that is connected with just hexahedro prism anti-rotation kinetoplast 1-3; Said tip connecting rod begins to comprise successively the first conical section 1-4, the second conical section 1-5, the first cylinder part 1-6 and the second cylinder part 1-7 from the end near anti-rotation kinetoplast 1-3; The diameter of each several part successively decreases towards the direction of work union joint according to anti-rotation kinetoplast 1-3 successively; The total length of horn 1 is 35.6mm, and each physical dimension of luffing pavilion is:
The diameter of the said first round platform 1-1 is 10mm, and the distance of its upper surface to horn 1 bottom face is 3mm;
The diameter of the said second round platform 1-2 is 8.5mm, and the distance of its upper surface to horn 1 bottom face is 4mm;
The spacing of relative two faces of said anti-rotation kinetoplast 1-3 is 7.0mm, and the distance of upper surface to horn 1 bottom face of this anti-rotation kinetoplast 1-3 is 9.9mm;
The distance of the upper surface of the said first conical section 1-4 to horn 1 bottom face is 12.4mm, and the radius of curvature of its upper surface and lower surface joint face sidewall curve is 4mm;
The distance of the upper surface of the said second conical section 1-5 to horn 1 bottom face is 14.5mm;
The diameter of the said first cylinder part 1-6 is 4.8mm, and the distance of its upper surface to horn 1 bottom face is 21.5mm;
The diameter of the said second cylinder part 1-7 is 4.5mm, and the distance of its upper surface to horn 1 bottom face is 30.1mm.
The height of the mobile jib 3 that matches with horn 1 is 26mm, and the total length of mobile jib 3 inside connecting rod 3-1 is 47mm, and its upper surface exceeds mobile jib 3 upper surface 14.5mm.
No. 2 transducers: structure is identical with No. 1 transducer, and just the size of each several part is different, and the total length of said horn 1 is 34.3mm, and this moment, each physical dimension of luffing pavilion was:
The diameter of the said first round platform 1-1 is 10mm, and the distance of its upper surface to horn 1 bottom face is 1.9mm;
The diameter of the said second round platform 1-2 is 8.5mm, and the distance of its upper surface to horn 1 bottom face is 2.9mm;
The spacing of relative two faces of said anti-rotation kinetoplast 1-3 is 7.0mm, and the distance of upper surface to horn 1 bottom face of this anti-rotation kinetoplast 1-3 is 8.8mm;
The distance of the upper surface of the said first conical section 1-4 to horn 1 bottom face is 11.3mm, and the radius of curvature of its upper surface and lower surface joint face sidewall curve is 4mm;
The distance of the upper surface of the said second conical section 1-5 to horn 1 bottom face is 13.4mm;
The diameter of the said first cylinder part 1-6 is 4.8mm, and the distance of its upper surface to horn 1 bottom face is 20.3mm;
The diameter of the said second cylinder part 1-7 is 4.5mm, and the distance of its upper surface to horn 1 bottom face is 38.8mm.
The height of the mobile jib 3 that matches with horn 1 is 26mm, and the total length of mobile jib 3 inside connecting rod 3-1 is 46mm, and its upper surface exceeds mobile jib 3 upper surface 13.5mm.
No. 3 transducers: structure is identical with No. 1 transducer, and just the size of each several part is different, and the total length of said horn 1 is 36.9mm, and this moment, each physical dimension of luffing pavilion was:
The diameter of the said first round platform 1-1 is 10mm, and the distance of its upper surface to horn 1 bottom face is 4.1mm;
The diameter of the said second round platform 1-2 is 8.5mm, and the distance of its upper surface to horn 1 bottom face is 5.1mm;
The spacing of relative two faces of said anti-rotation kinetoplast 1-3 is 7.0mm, and the distance of upper surface to horn 1 bottom face of this anti-rotation kinetoplast 1-3 is 11mm;
The distance of the upper surface of the said first conical section 1-4 to horn 1 bottom face is 13.4mm, and the radius of curvature of its upper surface and lower surface joint face sidewall curve is 4mm;
The distance of the upper surface of the said second conical section 1-5 to horn 1 bottom face is 15.6mm;
The diameter of the said first cylinder part 1-6 is 4.8mm, and the distance of its upper surface to horn 1 bottom face is 22.7mm;
The diameter of the said second cylinder part 1-7 is 4.5mm, and the distance of its upper surface to horn 1 bottom face is 31.4mm.
The height of the mobile jib 3 that matches with horn 1 is 26mm, and the total length of mobile jib 3 inside connecting rod 3-1 is 47mm, and its upper surface exceeds mobile jib 3 upper surface 14.5mm.
No. 4 transducers: the total length of horn 1 is all 35.6mm mutually, and structurally the second cylinder part 1-7 is identical with the diameter of the first cylinder part 1-6, and all the other physical dimensions in addition are all identical with No. 1 transducer.
The skeleton of selecting for use is 3 pig identical pig skulls in age; Respectively in the operating frequency of 24～29.5KHz; Carrying out the skeleton perforate at the same position of each pig skull under the condition of 20 ± 2 newton's power tests; The time that incision is of a size of the hole needs of 10mm * 10mm * 5mm compares, and repeats 5 identical experiments, and the result of gained is shown in following table 1.
Table 1:
Can find out that by experimental data in the above-mentioned table 1 work efficiency of the ultrasonic transducer of physical dimension of the present invention exceeds more than 30% than the transducer of other size.
2, transducer face temperature experiment
Respectively with above-mentioned No. 1, No. 2, No. 3, No. 4 bone surgery appearance; In temperature is under 25 ℃ of conditions with relative humidity 50%; With identical loaded work piece 1 hour, wherein the water temperature through transducer was 20 ℃, and gained transducer face temperature data are shown in following table 2.
Table 2:
Can find out that by experimental data in the table 2 surface temperature rise when ultrasonic transducer of physical dimension of the present invention is worked is than the transducer low 50% of other physical dimension.
Annotate: quality factor have directly been represented the quality of resonance circuit, and quality factor are high more, explain that the loss of resonance circuit is more little, but the too high meeting of quality factor causes the operating frequency range of transducer too small.The operating frequency of transducer is remained in the applicable scope, and quality factor can not surpass 800 usually.The data that obtain behind the direct measurement transducer of electric impedance analyzer that quality factor in the above form are to use frequency to be suitable for.
Claims (6)
1. ultrasonic transducer that is used for the bone surgery appearance; The horn (1), piezoelectric ceramics (2) and the mobile jib (3) that comprise coaxial connection; It is characterized in that: said horn (1) comprise with coaxial first round platform (1-1) that is connected of piezoelectric ceramics (2), with coaxial second round platform (1-2) that is connected of first round platform (1-1), with coaxial anti-rotation kinetoplast (1-3) that is connected of second round platform (1-2) and the tip connecting rod that is connected with anti-rotation kinetoplast (1-3), the total length of horn (1) is 34.6～36.6mm;
Said tip connecting rod begins to comprise successively two conical sections, two cylinders part and a tip union joint (1-8) from the end near the anti-rotation kinetoplast, and the diameter of described two conical sections, two cylinder parts and a tip union joint (1-8) successively decreases towards the direction of tip union joint according to anti-rotation kinetoplast (1-3) successively.
2. the ultrasonic transducer that is used for the bone surgery appearance according to claim 1; It is characterized in that: described two conical sections are respectively first conical section (1-4) and second conical section (1-5), and wherein first conical section (1-4) is between anti-rotation kinetoplast (1-3) and second conical section (1-5); Described two cylinders partly are respectively first cylinder part (1-6) and second cylinder part (1-7), and wherein first cylinder part (1-6) is between second conical section (1-5) and second cylinder part (1-7).
3. the ultrasonic transducer that is used for the bone surgery appearance according to claim 2 is characterized in that:
The diameter of said first round platform (1-1) is 9～11mm, and the distance of its upper surface to horn (1) bottom face is 2～4mm;
The diameter of said second round platform (1-2) is 7.5～9.5mm, and the distance of its upper surface to horn (1) bottom face is 3～5mm;
Said anti-rotation kinetoplast (1-3) is 6.5～8.5mm for just hexahedro prism, the spacing of its relative two faces, and the distance of this anti-rotation kinetoplast (1-3) upper surface to horn (1) bottom face is 8.9～10.9mm;
The distance of said first cone upper surface to horn (1) bottom face is 11.4～13.4mm; Its upper surface is connected with curved surface with the lower surface; This joint face sidewall is a curve; Radius of curvature is 3.5～6mm, and the diameter of the big end of said first cone is identical with the spacing of relative two faces of anti-rotation kinetoplast (1-3);
The distance of said second cone upper surface to horn (1) bottom face is 13.5～15.5mm; Its upper surface is connected with the inclined-plane with the lower surface; This joint face sidewall is a straight line; This straight line and first conical section (1-4) sidewall contact of a curve, the diameter of the big end of said second conical section (1-5) is identical with the diameter of the first cone small end, and the diameter of its small end is identical with the diameter of first cylinder part (1-6);
The diameter of said first cylinder part (1-6) is 4.3～5.8mm, and the distance of its upper surface to horn (1) bottom face is 20.5～22.5mm;
The diameter of said second cylinder part (1-7) is 4.0～5.3mm, and the distance of its upper surface to horn (1) bottom face is 29.1～31.1mm.
4. the ultrasonic transducer that is used for the bone surgery appearance according to claim 3; It is characterized in that: the external diameter of the mobile jib (3) that cooperates with horn (1) is identical with the diameter of horn (1) first round platform (1-1); Highly be 25～27mm; The total length of mobile jib (3) inside connecting rod (3 one 1) is 46～48mm, and its upper surface exceeds mobile jib (3) upper surface 13.5～15.5mm.
5. the ultrasonic transducer that is used for the bone surgery appearance according to claim 4 is characterized in that: said horn (1) total length is 35.6mm, wherein,
The diameter of said first round platform (1-1) is 10mm, and the distance of its upper surface to horn (1) bottom face is 3mm;
The diameter of said second round platform (1-2) is 8.5mm, and the distance of its upper surface to horn (1) bottom face is 4mm;
The spacing of relative two faces of said anti-rotation kinetoplast (1-3) is 7.0mm, and the distance of upper surface to horn (1) bottom face of this anti-rotation kinetoplast (1-3) is 9.9mm;
The distance of upper surface to horn (1) bottom face of said first conical section (1-4) is 12.4mm, and the radius of curvature of its upper surface and lower surface joint face sidewall curve is 4mm;
The distance of upper surface to horn (1) bottom face of said second conical section (1-5) is 14.5mm;
The diameter of said first cylinder part (1-6) is 4.8mm, and the distance of its upper surface to horn (1) bottom face is 21.5mm;
The diameter of said second cylinder part (1-7) is 4.5mm, and the distance of its upper surface to horn (1) bottom face is 30.1mm.
6. the ultrasonic transducer that is used for the bone surgery appearance according to claim 5 is characterized in that: the height of mobile jib (3) is 26mm, and the total length of mobile jib (3) inside connecting rod (3-1) is 47mm, and its upper surface exceeds mobile jib (3) upper surface 14.5mm.
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| CN 201010571244 CN102028523B (en) | 2010-12-02 | 2010-12-02 | Ultrasonic transducer for orthopaedic surgery instrument |
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