CN211213826U

CN211213826U - Ultrasonic suction and injection integrated instrument

Info

Publication number: CN211213826U
Application number: CN201921161429.3U
Authority: CN
Inventors: 颜忠余; 汪辉; 程春节; 骆威
Original assignee: Innolcon Medical Technology Suzhou Co Ltd
Current assignee: Innolcon Medical Technology Suzhou Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-08-11
Anticipated expiration: 2029-07-23

Abstract

The utility model discloses an liquid integration apparatus is annotated in supersound suction, including the shell, arrange the inside width of cloth pole of shell in, extend to set up the interior needle tubing and the outer needle hub of shell distal end, outer needle hub cup joints the outside of interior needle tubing, the inside suction pipeline that is of cavity of interior needle tubing, the clearance between the inner wall of outer needle hub and the outer wall of interior needle tubing is for annotating the liquid pipeline, the distal end formation of suction pipeline and notes liquid pipeline crosses. The utility model discloses utilize the positive opening of interior needle tubing distal end and perfusate contact, produce hole, blasting by ultrasonic vibration, come breakage, liquefaction and gettering vitreous body through the cavitation promptly, reduce ultrasonic vibration to the damage of the tissue around the syringe needle, reduce thermal production and influence, provide the perfusate and promote the efficiency to vitreous body liquefaction and suction.

Description

Ultrasonic suction and injection integrated instrument

Technical Field

The utility model relates to the field of medical equipment, especially, relate to an ultrasonic suction annotates liquid integration apparatus.

Background

The human eye can display an image on the rear retina by transmitting light through the cornea and performing image converging focusing through the crystalline lens and focusing through the vitreous body. The quality of the focus is determined by many factors, including the size and shape of the eye, and the transparency of the cornea, lens, vitreous, etc. The vitreous body is a gelatinous transparent tissue at the back end of the eye, and when diseases such as fundus hemorrhage, retinal detachment and the like occur to the eye, the vitreous body needs to be sucked by a glass cutting operation, and the removal of the vitreous body can also relieve the tension applied to the retina and other tissues of the eye. The common glass cutting surgical instrument comprises a glass cutting handle, an illuminating tube, an injection tube and the like.

Chinese patent CN104640522B "vibrating surgical device for removing vitreous body and other tissues" discloses an apparatus for ultrasonically driving an aspiration needle (cannula) which utilizes an ultrasonic handle to drive the aspiration needle; as with conventional ophthalmic aspiration needle cannulas, the distal tip of the needle has an aspiration port cross-sectional area that is smaller than the cross-sectional area of the lumen. According to this patent publication, the use of such a device for removing vitreous is caused by the periodic bi-directional flow of tissue through the side port created by the suction pressure and the vibration of the needle cannula, without creating a cavity outside the distal tip. In such devices, the amplitude of the ultrasonic vibrations is desirably limited to a small range to reduce turbulence or tissue damage. In practical applications, such suitable amplitude limits are difficult to grasp; the vibrations of the ultrasound and the heat generated thereby can damage delicate tissues such as the retina, and without proper cooling and protective sheathing, there can be safety issues with the medical device. However, the addition of the jacket again affects the performance of the ultrasound and increases heating. Although this patent mentions several sheaths attached to the distal end of the cannula to reduce damage caused by turbulence, none of them give solutions to affect the ultrasound performance and heating effect; and the suction function and the infusion function of the device are realized by two different devices separately.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an ultrasonic suction annotates liquid integration apparatus utilizes interior needle tubing distal end openly to contact with the perfusate, produces cavity, blasting by ultrasonic vibration, comes breakage, liquefaction, and suction vitreous body through the cavitation promptly, reduces ultrasonic vibration to the damage of the tissue around the syringe needle, reduces thermal production and influence, provides the perfusate and promotes the efficiency to vitreous body liquefaction and suction.

For solving the above technical problem, the technical scheme of the utility model is that:

an ultrasonic suction and injection integrated instrument comprises a shell, an amplitude transformer arranged in the shell, an inner needle tube and an outer needle sleeve which are arranged at the far end of the shell in an extending mode, wherein the outer needle sleeve is sleeved on the outer side of the inner needle tube, a suction pipeline is arranged in the hollow inner portion of the inner needle tube, a gap between the inner wall of the outer needle sleeve and the outer wall of the inner needle tube is an injection pipeline, and the far ends of the suction pipeline and the injection pipeline are intersected.

Preferably, the liquid injection pipeline further comprises a perfusion connector and a perfusion tube which are arranged on the shell, and the perfusion tube can be configured to be a pipeline which is externally attached to the shell or a channel which is arranged in the shell.

Preferably, the outer needle sleeve comprises a closed flat top surface located on the end face of the distal end, and a liquid injection side hole and a suction side hole which are respectively located on the lateral sides of the two ends of the outer needle sleeve.

Preferably, a gap is formed between the distal end face of the inner needle tube and the inner wall of the gentle top surface of the outer needle sleeve, and the gap is communicated with the suction side hole.

Preferably, a connecting body is arranged at the proximal end of the inner needle tube, and the inner needle tube is fixed on the amplitude transformer through the connecting body.

Preferably, the connecting body comprises a conical proximal end with a split, a middle section with an external thread structure and a distal end for applying force and locking, the outer diameter of the middle section is larger than the maximum outer diameter of the conical proximal end, an internal thread matched with the amplitude transformer is arranged on the amplitude transformer, the inside of the connecting body comprises a central pore passage, the central pore passage comprises a large-diameter area and a small-diameter area, the small-diameter area is located in the conical proximal end and the middle section, the diameter of the small-diameter area is equal to the outer diameter of the inner needle tube, and the large-diameter area is located in the distal end, and the diameter of the large-diameter area is larger than the outer diameter of the outer.

Preferably, the large diameter area is provided with a step surface, and the proximal end surface of the outer needle sleeve is propped against the step surface.

Preferably, the far end of the shell is connected with a liquid injection soft shoulder sleeve, the far end of the liquid injection soft shoulder sleeve is provided with a needle sleeve clamping hole, and the inner diameter of the needle sleeve clamping hole is smaller than the outer diameter of the outer needle sleeve under the unstressed condition.

Preferably, the liquid injection soft shoulder sleeve is in threaded connection with the outer shell.

Preferably, annotate liquid soft shoulder cover with the shell forms one after fixed with external sealed annotates liquid circulation space, it forms to annotate liquid circulation space annotate a part of liquid pipeline, annotate liquid circulation space one side through outer needle cover annotate liquid side opening with clearance intercommunication between the inner wall of outer needle cover and the outer wall of interior needle tubing, the opposite side with fill on the shell and connect, fill the pipe intercommunication.

Preferably, the injection side hole is located in the injection circulation space.

The utility model discloses still more in detail disclose another kind of liquid integration apparatus is annotated in ultrasonic suction, including the shell, arrange the inside width of cloth pole of shell in, extend to set up the interior needle tubing and the outer needle cover of shell distal end, outer needle cover cup joints the outside of interior needle tubing, the near-end of interior needle tubing is fixed through a connector the distal end of width of cloth pole, the near-end of outer needle cover is fixed through one annotating liquid soft shoulder cover the distal end of shell, ultrasonic suction annotates liquid integration apparatus and is included suction line and annotate the liquid pipeline, suction line includes that the cavity of interior needle tubing is inside, the central pore of connector, the hole and the suction of width of cloth pole connect, it includes to annotate the liquid pipeline the clearance between the inner wall of outer needle cover and the outer wall of interior needle tubing, annotate liquid soft shoulder cover with annotate liquid circulation space between the shell the gap between shell and the width of cloth pole, The far ends of the suction pipeline and the liquid injection pipeline form intersection.

Preferably, the proximal end of the outer sleeve is in clearance fit with the connecting body.

Preferably, the outer needle sleeve comprises a suction side hole and an injection side hole which are respectively arranged at two ends of the outer needle sleeve, the inlet of the suction pipeline is a far-end opening of the inner needle tube, and the far-end opening is positioned at one side of the suction side hole.

Preferably, the outer needle sleeve comprises a closed flat top surface located on the distal end face, and a gap is formed between the distal end opening of the inner needle tube and the inner wall of the flat top surface of the outer needle sleeve, and the gap is communicated with the suction side hole.

Preferably, the liquid injection soft shoulder sleeve and the shell are fixed through threads to form a liquid injection circulation space sealed with the outside, and the liquid injection side hole is located in the liquid injection circulation space.

Preferably, the connecting body comprises a tapered proximal end with a split, a middle section with an external thread structure and a distal end for applying force and locking, the outer diameter of the middle section is larger than the maximum outer diameter of the tapered proximal end, an internal thread matched with the middle section is arranged on the amplitude transformer, the inside of the connecting body comprises the central pore passage, the central pore passage comprises a large-diameter area and a small-diameter area, the small-diameter area is positioned inside the tapered proximal end and the middle section, the diameter of the small-diameter area is equivalent to the outer diameter of the inner needle tube, and the large-diameter area is positioned inside the distal end, and the diameter of the large-diameter area is larger than the outer diameter of the outer; the large-diameter area is provided with a step surface, and the proximal end surface of the outer needle sleeve is propped against the step surface.

Preferably, the proximal end of the inner needle cannula is flush with or protrudes beyond the proximal end of the tapered proximal end by a length not exceeding one eighth of the wavelength of the ultrasonic operating frequency of the instrument.

Preferably, the proximal end of the inner needle cannula is glued into the central bore of the tapered proximal end of the connecting body by means of a high-strength glue.

The beneficial effects of the utility model are mainly embodied in that:

1. the junction formed by the far ends of the suction pipeline and the liquid injection pipeline of the utility model has the ultrasonic vibration of the inner needle tube, and because the front opening of the far end of the inner needle tube is contacted with the perfusate, the junction is easy to generate a cavity to cause cavitation, and then the glass body is crushed, liquefied and absorbed through the cavitation;

2. the gap is arranged between the outer needle sleeve and the inner needle tube of the ultrasonic vibration, and the outer needle sleeve is loosely matched with the connecting body, so the ultrasonic vibration of the connecting body and the inner needle tube can not be transmitted to the outer needle sleeve, the ultrasonic performance of the inner needle tube can not be influenced, and the damage of the ultrasonic vibration to the tissues around the needle head can be reduced;

3. ultrasonic vibration itself can cause to generate heat, and compared with the elastomer sleeve on the needle head in the prior art, the elastomer sleeve also can cause friction heat generation, the vitreous body is viscous and slow in circulation, and heat can not be effectively taken away;

4. the cavitation generated by the utility model has the functions of liquefying and breaking the viscous vitreous body, so that the vitreous body is easier to suck;

5. the utility model discloses an interior needle tubing openly natural opening, it is big, the resistance is little than the less opening flow of side, further helps the suction, promotes the efficiency of suction.

Drawings

Fig. 1 is a schematic view of an ultrasonic aspiration and injection integrated instrument provided by a preferred embodiment of the present invention;

fig. 2 is a partial cross-sectional view of an ultrasonic aspiration and infusion integrated instrument provided in accordance with a preferred embodiment of the present invention;

FIG. 3 is an exploded schematic view of FIG. 2;

fig. 4 is a schematic structural diagram of a connector according to a preferred embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not limited to the present invention, and structural, method, or functional changes made by those skilled in the art according to these embodiments are all included in the scope of the present invention.

In the description of the embodiments, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

As shown in fig. 1 to fig. 3, the utility model discloses an ultrasonic suction and injection integrated apparatus, which comprises a housing 101, an amplitude transformer 105 arranged inside the housing, an inner needle tube 201 and an outer needle sleeve 301 extending from the distal end of the housing 101, wherein the outer needle sleeve 301 is sleeved outside the inner needle tube 201.

The proximal end of the inner needle tube 201 is fixed to the distal end of the horn 105 by a connecting body 203 (shown in fig. 4, described in detail later), and the three are fixed to each other. The proximal end of the outer needle sheath 301 is fixed to the distal end of the housing 101 by a priming soft shoulder sheath 102. The outer needle sleeve 301 is in clearance fit with the connecting body 203, and the specific structure is as follows:

the proximal end of the housing 101 is provided with an irrigation connector 103 and an aspiration connector 108, which are in communication with a source of infusion fluid and a source of aspiration for generating negative pressure, respectively. The perfusion connector 103 and the suction connector 108 serve as proximal interfaces of a liquid injection pipeline and a suction pipeline respectively. The distal end of shell 101 is fixed with one and annotates liquid soft shoulder cover 102, both pass through threaded connection in the preferred embodiment of the utility model, just it is the toper structure to annotate liquid soft shoulder cover 102. The liquid injection soft shoulder sleeve 102 is provided with a needle sleeve clamping hole 106, and the inner diameter of the needle sleeve clamping hole 106 is smaller than the outer diameter of the outer needle sleeve 301 under the unstressed condition, so that the outer needle sleeve 301 can be fixed at a certain position by the needle sleeve clamping hole 106 and sealed and leak-proof after passing through the needle sleeve clamping hole 106.

The horn 105 is of a conventional structure, and includes an inner bore 1051 therein, and a distal end of the inner bore 1051 is of an internal thread structure.

The connector 203 includes a tapered proximal end 2032 having a split 2031, a middle section 2033 having an external thread configuration, and a distal end 2034 for force-locking. The intermediate section 2033 has an outer diameter greater than the maximum outer diameter of the tapered proximal end 2032 and has external threads matching the internal threads on the horn 105.

The interior of the connecting body 203 includes the central bore 2035, the central bore 2035 includes a major diameter area 2036 and a minor diameter area 2036, the minor diameter area being located within the tapered proximal and

intermediate sections

2032, 2033 and having a diameter comparable to the outer diameter of the inner needle cannula 201, and the major diameter area 2036 being located within the distal end 2034 and having a diameter larger than the outer diameter of the outer needle cannula 301. The major diameter region 2036 has a stepped surface 2037 against which the proximal end surface 2037 of the outer sleeve 301 abuts, although a slight clearance is possible.

When the proximal end of the inner needle cannula 201 extends into the central bore 2035 of the connector 203, the proximal end of the inner needle cannula 201 is flush with or protrudes beyond the proximal end of the tapered proximal end 2032 by a length not exceeding one eighth of the wavelength of the ultrasonic operating frequency of the instrument, so as not to affect the ultrasonic characteristics of the system.

In the preferred embodiment, the inner diameter of the smaller diameter section of the central bore 2035 is slightly larger than the outer diameter of the inner needle cannula 201, and when the split 2031 is tightened, the central bore 2035 of the tapered proximal end 2032 is reduced to lock the inner needle cannula 201 and the connector 203 together. With this design, the stress on the locking portion of the inner needle cannula 201 is gradually reduced from the proximal end to the distal end, so that the stress concentration caused by the ultrasonic vibration is reduced during operation. In order to improve the coupling of the inner needle 201 to the connecting body 203 and to further reduce the stress concentration, it is recommended to glue the two together at the locking position with a high strength glue. Specifically, after the inner needle cannula 201 is inserted into the connecting body 203, the connecting body 203 is threaded into the horn 105. The length of the internal thread area of the amplitude transformer is shorter than the screwing length of the connecting body, the diameter of the inner hole 1051 of the amplitude transformer is smaller than the outer diameter of the conical proximal end 2032 of the connecting body, so that when the connecting body 203 is screwed continuously, the conical proximal end 2032 of the connecting body can touch the inner hole of the amplitude transformer, the chamfer at the contact part can compress and shrink the split opening 2031, and finally the inner needle tube 201, the connecting body 203 and the amplitude transformer 105 are well coupled together.

In the preferred embodiment, the inner needle cannula 201 is a straight steel needle that includes a hollow interior 202 and a distal opening 204.

The outer needle sheath 301 is sleeved outside the inner needle tube 201, and the outer needle sheath 301 comprises a suction side hole 304 and an injection side hole 303 which are respectively arranged at two ends of the outer needle sheath. The outer needle sheath 301 further comprises a closed flat top surface 302 at the distal end face, the distal end opening 204 of the inner needle tube 201 is located at the side of the suction side hole 304, and a gap 305 is formed between the distal end opening and the inner wall of the flat top surface 302 of the outer needle sheath 301, and the gap 305 is communicated with the suction side hole 304.

The outer needle hub 301 is fitted over the inner needle cannula 201 from the distal end thereof and then inserted until it reaches the stepped surface 2037 of the large diameter area 2036 of the connecting body 203. The inner diameter of the large diameter region 2036 is greater than the outer diameter of the outer needle hub 301 and is within 50 microns. Thus, the proximal end of the outer sleeve 301 is in clearance fit (i.e. loose fit) with the connecting body 203 for controlling the centering of the outer sleeve 301. The injection soft shoulder sleeve 102 is sleeved on the outer side of the outer needle sleeve 301 from the far end through the needle sleeve clamping hole 106, so that an injection circulation space 107 sealed with the outside is formed, and the injection side hole 303 of the outer needle sleeve 301 is positioned in the injection circulation space 107. One side of the injection flowing space 107 is communicated with a gap between the inner wall of the outer needle sleeve 301 and the outer wall of the inner needle tube 201 through an injection side hole 303 of the outer needle sleeve 301, and the other side is communicated with the perfusion connector 103 and the perfusion tube 104 on the shell 101.

As mentioned above, the ultrasonic suction and injection integrated instrument forms a suction pipeline and an injection pipeline.

The aspiration line includes the aspiration side port 304 of the outer needle hub 301, the distal opening 204 of the inner needle cannula 201, the hollow interior 202 of the inner needle cannula 201, the central bore 2035 of the connecting body 203, the internal bore 1051 of the horn 105, and the aspiration fitting 108.

The liquid injection pipeline comprises a gap between the inner wall of the outer needle sleeve 301 and the outer wall of the inner needle tube 201, a liquid injection circulation space 107 between the liquid injection soft shoulder sleeve 102 and the shell 101, a gap between the shell 101 and the amplitude transformer 105, a perfusion joint 103 and a perfusion tube 104. The infusion tube 104 may be configured as tubing that is attached externally to the housing 101 or as a channel that is placed within the housing 101.

In the preferred embodiment, the inner diameter of the outer needle sheath 301 is larger than the outer diameter of the inner needle tube 201 by 20-200 microns, and the gap between the outer needle sheath and the inner needle tube 201 is controlled within a certain range to control the speed of injection, so that the speed of suction is larger than the speed of injection, and vitreous tissues can be ensured to be close to the distal opening 204 of the inner needle tube 201. The utility model discloses an interior needle tubing 201 openly natural opening, less opening flow than prior art side is big, the resistance is little, further helps the suction, promotes the efficiency of suction.

In the case of ultrasonic operation, the ultrasonic vibrations are transmitted through the handle horn 105 to the distal end of the inner needle cannula 201, causing cavitation of the perfusate near the distal end due to the intersection of the distal ends of the aspiration and infusion lines, which causes local vitreous liquefaction to be drawn away along with the perfusate.

Compared with the principle of pumping the vitreous body in the prior art, the principle of pumping the vitreous body is that bidirectional flow is utilized, and no cavity is needed or is not expected to be generated, so that the fine tissues of the eyes are damaged due to cavitation caused by the cavity; the amplitude of the lift pin is controlled to be small. The utility model discloses the principle of the suction vitreous body utilizes the cavitation, has the existence of non-viscous liquid like water at the ultrasonic vibration face, just produces the cavity more easily, arouses the cavitation. The utility model discloses the ultrasonic vibration of needle tubing in the junction that the distal end of suction pipeline and notes liquid pipeline formed, moreover because the positive opening of interior needle tubing distal end contacts with perfusate (for example water), consequently this junction produces the hole very easily, arouses the cavitation, and the cavitation of production has the effect of liquefaction, broken thick vitreous body, makes it easily by the suction.

More importantly, the ideal mode of not creating voids in the prior art is difficult to control in many cases, such as if there is liquid from an additional injection needle, the ultrasonically driven aspiration needle amplitude exceeds a certain threshold, etc.; the jet flow, the explosion and the vibration of the suction needle generated by the cavity can damage the eye tissue, so the prior art proposes that a protective sleeve is sleeved on the suction needle, namely, an elastomer sleeve is attached on the suction needle, and the ultrasonic vibration at the suction needle is large and sensitive, thereby affecting the ultrasonic performance. The utility model discloses a gapped and lead to the perfusate liquid between outer needle cover and ultrasonic vibration's the interior needle tubing, the soft shoulder cover 102 of loose complex connector 203 and notes liquid makes outer needle cover 301 fix a position between two parties, so on connector 203, interior needle tubing 201's ultrasonic vibration can not pass outer needle cover 301, outer needle cover 301 just can not influence the ultrasonic performance of interior needle 201 yet, and also can reduce ultrasonic vibration to the supersound or the mechanical damage that the tissue produced around the syringe needle, come the protection meticulous tissue like the retina.

Ultrasonic vibration itself can arouse to generate heat, compares in prior art's elastomer cover also can arouse the frictional heating with suction syringe needle vibration friction, and the vitreous body is ropy and circulates slowly, can not take away the heat effectively, the utility model discloses the junction that well suction pipeline and the distal end of notes liquid pipeline formed has the passing through of perfusate, has played the cooling action effectively, and the perfusate also plays lubricated suction pipeline's effect simultaneously, reduces the frictional resistance of pipeline, makes the suction velocity of flow accelerate, and efficiency promotes.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims

1. The ultrasonic suction and injection integrated instrument is characterized by comprising a shell (101), an amplitude transformer (105) arranged in the shell, an inner needle tube (201) and an outer needle sleeve (301) which are arranged at the far end of the shell (101) in an extending mode, wherein the outer needle sleeve (301) is sleeved on the outer side of the inner needle tube (201), a suction pipeline is arranged in a hollow inner portion (202) of the inner needle tube (201), a gap between the inner wall of the outer needle sleeve (301) and the outer wall of the inner needle tube (201) is an injection pipeline, and the far ends of the suction pipeline and the injection pipeline are intersected.

2. The ultrasonic aspiration and infusion integrated instrument of claim 1, wherein the infusion line further comprises an infusion connector (103) disposed on the housing (101), an infusion tube (104), and the infusion tube (104) is configurable to be attached to a line on the housing (101) or a channel disposed within the housing (101).

3. The ultrasonic aspiration and injection integrated instrument is characterized in that the outer needle sleeve (301) comprises a closed gentle top surface (302) at the far end face, and injection side holes (303) and suction side holes (304) which are respectively arranged at the lateral sides of the two ends of the outer needle sleeve (301).

4. The ultrasonic aspiration and injection integrated instrument is characterized in that a gap (305) is formed between the distal end face of the inner needle tube (201) and the inner wall of the gentle top surface (302) of the outer needle sleeve (301), and the gap (305) is communicated with the aspiration side hole (304).

5. The ultrasonic aspiration and injection integrated instrument is characterized in that the proximal end of the inner needle tube (201) is provided with a connecting body (203), and the inner needle tube (201) is fixed on the amplitude transformer (105) through the connecting body (203).

6. The ultrasonic aspiration and infusion integrated device according to claim 5, wherein the connecting body (203) comprises a tapered proximal end (2032) having a split (2031), a middle section (2033) having an external thread structure, and a far end (2034) for applying force and locking, the outer diameter of the middle section (2033) is larger than the maximum outer diameter of the conical near end (2032), and the amplitude transformer (105) is provided with internal threads matched with the amplitude transformer, the interior of the connector (203) includes a central bore (2035), the central bore (2035) including a major diameter region (2036) and a minor diameter region, the small diameter area is positioned inside the tapered proximal end (2032) and the middle section (2033) and has a diameter corresponding to the outer diameter of the inner needle tube (201), the large diameter region (2036) is located inside the distal end (2034) and has a diameter greater than the outer diameter of the outer needle hub (301).

7. The ultrasonic aspiration and infusion integrated device according to claim 6, wherein the large diameter area (2036) is provided with a step surface (2037), and the proximal end surface of the outer needle sleeve (301) is abutted against the step surface (2037).

8. The ultrasonic aspiration and injection integrated device according to claim 1, wherein a soft injection shoulder sleeve (102) is connected to the distal end of the housing (101), the distal end of the soft injection shoulder sleeve (102) has a needle sleeve clamping hole (106), and the inner diameter of the needle sleeve clamping hole (106) is smaller than the outer diameter of the outer needle sleeve (301) in an unstressed condition.

9. The ultrasonic aspiration and infusion integrated instrument according to claim 8, wherein a threaded connection is formed between the infusion soft shoulder sleeve (102) and the outer shell (101).

10. The ultrasonic aspiration and injection integrated instrument as claimed in claim 8, wherein the injection soft shoulder sleeve (102) is fixed to the housing (101) to form an injection circulation space (107) sealed from the outside, the injection circulation space (107) forms a part of the injection pipeline, one side of the injection circulation space (107) is communicated with a gap between the inner wall of the outer needle sleeve (301) and the outer wall of the inner needle tube (201) through an injection side hole (303) of the outer needle sleeve (301), and the other side is communicated with an injection joint (103) and an injection tube (104) on the housing (101).

11. The ultrasonic aspiration infusion integrated instrument according to claim 10, wherein the infusion side hole (303) is located in the infusion flow space (107).

12. The ultrasonic suction and injection integrated instrument is characterized by comprising a shell (101), an amplitude transformer (105) arranged in the shell, an inner needle tube (201) and an outer needle sleeve (301) which are arranged at the far end of the shell (101) in an extending mode, wherein the outer needle sleeve (301) is sleeved on the outer side of the inner needle tube (201), the near end of the inner needle tube (201) is fixed at the far end of the amplitude transformer (105) through a connecting body (203), the near end of the outer needle sleeve (301) is fixed at the far end of the shell (101) through an injection soft shoulder sleeve (102), the ultrasonic suction and injection integrated instrument comprises a suction pipeline and an injection pipeline, the suction pipeline comprises a hollow inner part (202) of the inner needle tube (201), a central pore passage (5) of the connecting body (203), an inner hole (1051) of the amplitude transformer (105) and a suction connector (108), and the injection pipeline comprises a gap between the inner wall of the outer needle sleeve (301) and the outer wall of the inner needle tube (201), and a gap between the inner wall, The liquid injection soft shoulder sleeve is characterized in that a liquid injection circulation space (107) between the liquid injection soft shoulder sleeve (102) and the shell (101), a gap between the shell (101) and the amplitude transformer (105), a perfusion connector (103) and a perfusion tube (104) are intersected, and the far ends of the suction pipeline and the liquid injection pipeline are intersected.

13. The ultrasonic aspiration and infusion integrated device according to claim 12, wherein a clearance fit is formed between the proximal end of the outer needle sheath (301) and the connecting body (203).

14. The ultrasonic aspiration and injection integrated instrument of claim 12, wherein the outer needle sleeve (301) comprises an aspiration side hole (304) and an injection side hole (303) which are respectively arranged at two ends of the outer needle sleeve, the inlet of the aspiration pipeline is a distal end opening (204) of the inner needle tube (201), and the distal end opening (204) is positioned at one side of the aspiration side hole (304).

15. The ultrasonic aspiration and injection integrated instrument as claimed in claim 14, wherein the outer needle sleeve (301) comprises a closed flat top surface (302) at the distal end face, a gap (305) is formed between the distal opening (204) of the inner needle tube (201) and the inner wall of the flat top surface (302) of the outer needle sleeve (301), and the gap (305) is communicated with the aspiration side hole (304).

16. The ultrasonic aspiration and infusion integrated instrument is characterized in that the infusion soft shoulder sleeve (102) is fixed with the outer shell (101) in a threaded mode and forms an infusion flow space (107) sealed with the outside, and the infusion side hole (303) is located in the infusion flow space (107).

17. The ultrasonic aspiration infusion integrated device of claim 12, the connector (203) includes a tapered proximal end (2032) having a split (2031), a mid-section (2033) having an external thread configuration, and a far end (2034) for applying force and locking, the outer diameter of the middle section (2033) is larger than the maximum outer diameter of the conical near end (2032), and the amplitude transformer (105) is provided with internal threads matched with the amplitude transformer, the interior of the connector (203) includes the central bore (2035), the central bore (2035) including a major diameter region (2036) and a minor diameter region, the small diameter area is positioned inside the tapered proximal end (2032) and the middle section (2033) and has a diameter corresponding to the outer diameter of the inner needle tube (201), the large diameter region (2036) is located inside the distal end (2034) and has a diameter greater than the outer diameter of the outer needle hub (301); the large diameter area (2036) has a step surface (2037) against which the proximal end surface of the outer sleeve (301) abuts (2037).

18. The ultrasonic aspiration and infusion integrated device according to claim 17, wherein the proximal end of the inner needle tube (201) is flush with or protrudes from the proximal end of the tapered proximal end (2032) by a length not exceeding one eighth of the wavelength of the ultrasonic operating frequency of the device.

19. The ultrasonic aspiration and infusion integrated device according to claim 17, wherein the proximal end of the inner needle tube (201) is glued into the central bore (2035) of the tapered proximal end (2032) of the connecting body (203) by high-strength glue.