Composite vibration phacoemulsification needle and cataract phacoemulsification instrument

Abstract

The utility model provides a composite vibration phacoemulsification needle and a cataract phacoemulsification instrument, which relates to the technical field of medical devices. The composite vibration phacoemulsification needle provided by the utility model includes: a needle body, a cutting groove penetrating the inner and outer side surfaces of the needle body is arranged on the side wall of the needle body, and the length direction of the cutting groove is consistent with the length direction of the needle body; the distal end of the cutting groove is connected to the distal end face of the needle body, and the groove side wall of the cutting groove and the connecting edge of the outer side surface of the needle body form a first blade structure. When the composite vibration phacoemulsification needle is working, the needle head will perform a composite axial and circumferential motion. When the needle head rotates, the first blade structure can play a cutting role, increase the overall sharpness of the needle head, increase the rotational cutting ability, and the first blade structure is hidden on the side wall, which increases safety.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a composite vibration phacoemulsification needle and a cataract phacoemulsification instrument. Background Art

[0002] Phacoemulsification instrument is an important device for phacoemulsification of cataract. During the operation, a phacoemulsification needle is inserted into a small incision in the cornea or sclera of the operated eye to break up the cloudy lens and cortex into chyle. The chyle is then sucked out with the help of a suction and perfusion system while keeping the anterior chamber filled. An artificial lens is then implanted to restore the patient's sight.

[0003] Cataract phacoemulsification needle products used in ophthalmic cataract phacoemulsification surgery generally have the following disadvantages: the emulsification strength of the hard nucleus in cataract surgery is very poor, and some are almost unable to emulsify. Utility Model Content

[0004] The utility model aims to provide a composite vibration phacoemulsification needle and a cataract phacoemulsification instrument to alleviate the technical problem that the existing composite vibration phacoemulsification needle has poor hard core processing ability.

[0005] In a first aspect, the utility model provides a composite vibration phacoemulsification needle, comprising: a needle body, a side wall of the needle body is provided with a cutting groove penetrating the inner and outer sides thereof, and the length direction of the cutting groove is consistent with the length direction of the needle body;

[0006] The distal end of the cutting groove is communicated with the distal end surface of the needle body, and the connecting edge between the groove side wall of the cutting groove and the outer side surface of the needle body forms a first blade structure.

[0007] Furthermore, a through hole penetrating the inner and outer sides of the needle body is provided on the side wall of the needle body, the through hole is connected to the proximal end of the cutting groove, and the connecting edge between the inner side wall of the through hole and the outer side surface of the needle body forms a second blade structure.

[0008] Further, the needle body comprises a head end portion, a needle shaft portion and a conversion portion which are sequentially connected from the distal end to the proximal end, and the cutting groove is arranged at the head end portion;

[0009] Along the axial direction, the outer diameter of each position of the needle shaft is consistent;

[0010] From the proximal end to the distal end, the outer diameter of the conversion part gradually decreases, and a spiral groove extending in the axial direction is arranged on the outer wall of the conversion part.

[0011] Furthermore, the pitch of the spiral groove ranges from 10 mm to 20 mm;

[0012] And / or, the length of the spiral groove is in the range of 10 mm to 15 mm;

[0013] And / or, the number of spiral grooves ranges from 1 to 6;

[0014] and / or, the depth of the spiral groove is in the range of 20% to 40% of the maximum outer diameter of the conversion portion;

[0015] And / or, the width of the spiral groove is in the range of 20% to 90% of the diameter of the head end;

[0016] And / or, the cross section of the spiral groove is rectangular or triangular.

[0017] Furthermore, a rough structure is arranged on the outer side surface of the head end portion.

[0018] Further, the rough structure includes a plurality of concave portions.

[0019] Further, the rough structure includes at least one ring structure, and the ring structure includes a plurality of recesses arranged in sequence along the circumferential direction;

[0020] Alternatively, the rough structure includes at least one spiral structure, and the spiral structure includes a plurality of concave portions arranged sequentially along a spiral direction.

[0021] Furthermore, along the depth direction of the recess, the cross section of the recess is in the shape of a triangle.

[0022] Furthermore, a connecting portion is provided at the distal end of the needle body, and the connecting portion is used to connect with the ultrasonic handpiece;

[0023] The connecting part comprises a clamping platform, a fixing plate and a connecting thread which are sequentially connected from the distal end toward the tip; the cross section of the clamping platform is in the shape of a quadrilateral.

[0024] In a second aspect, the utility model provides a cataract phacoemulsification instrument, comprising the above-mentioned composite vibration phacoemulsification needle.

[0025] The utility model has at least the following advantages or beneficial effects:

[0026] The composite vibration phacoemulsification needle provided by the utility model comprises: a needle body, a side wall of the needle body is provided with a cutting groove penetrating the inner and outer side surfaces thereof, the length direction of the cutting groove is consistent with the length direction of the needle body; the distal end of the cutting groove is connected to the distal end surface of the needle body, and the groove side wall of the cutting groove and the connecting edge of the outer side surface of the needle body form a first blade structure.

[0027] When the composite vibration phacoemulsification needle is working, the needle will perform a composite motion in the axial and circumferential directions. When the needle rotates, the first blade structure can play a cutting role, thereby increasing the overall sharpness of the needle and the rotational cutting ability. In addition, the first blade structure is hidden on the side wall, thereby increasing safety.

[0028] The cataract phacoemulsification instrument provided by the utility model includes the above-mentioned composite vibration phacoemulsification needle. Because the cataract phacoemulsification instrument provided by the utility model uses the above-mentioned composite vibration phacoemulsification needle, the cataract phacoemulsification instrument provided by the utility model also has the advantages of the composite vibration phacoemulsification needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of a composite vibration phacoemulsification needle provided in an embodiment of the utility model;

[0031] Figure 2 for Figure 1 A partial enlarged view of position A in the middle;

[0032] Figure 3 Schematic diagram of 6 types of composite vibration phacoemulsification needles with different ring structures provided by the embodiment of the utility model;

[0033] Figure 4 Schematic diagram of 6 types of composite vibration phacoemulsification needles with different spiral structures provided by the embodiment of the utility model;

[0034] Figure 5 Schematic diagram of five types of composite vibration phacoemulsification needles with rectangular spiral grooves provided in the embodiments of the utility model;

[0035] Figure 6 Schematic diagram of five types of composite vibrating phacoemulsification needles with triangular spiral grooves provided in the embodiments of the utility model.

[0036] Icons: 10 - head end; 11 - cutting groove; 111 - first blade structure; 12 - through hole; 121 - second blade structure; 13 - rough structure; 131 - recessed portion; 132 - ring structure; 133 - spiral structure; 20 - needle rod portion; 30 - conversion portion; 31 - spiral groove; 40 - connecting portion; 41 - clamping table; 42 - fixing plate; 43 - connecting thread. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In this embodiment, the end far from the operator is the distal end, and the end close to the operator is the proximal end.

[0044] The composite vibration phacoemulsification needle provided by the utility model is applied to a phacoemulsification instrument, and can generate axial and circumferential (torsion) composite motion at the head end 10. The axial vibration is amplified by the amplitude rod in the ultrasonic handle, and after the axial vibration is amplified, a torsion conversion is performed at the conversion part 30 of the phacoemulsification needle. A certain axial vibration amplitude is retained at the needle head to generate axial and circumferential composite vibration, so that the phacoemulsification needle has both the impact effect of axial vibration and the cutting effect of torsional vibration.

[0045] like Figure 1 and Figure 2 As shown, the needle includes: a needle body, the interior of the needle body has a suction channel connecting the distal and proximal end faces, and the distal end of the needle body has a certain sharpness, which can increase the impact force of the axial vibration and facilitate the chopping of the core. A cutting groove 11 is provided on the side wall of the needle body, which runs through the inner and outer side faces thereof, and the length direction of the cutting groove 11 is consistent with the length direction of the needle body; the distal end of the cutting groove 11 is connected to the distal end face of the needle body, and the groove side wall of the cutting groove 11 and the connecting edge of the outer side face of the needle body form a first blade structure 111. When the composite vibration phacoemulsification needle is working, the needle will perform a composite axial and circumferential motion. When the needle rotates, the first blade structure 111 can play a cutting role, increase the overall sharpness of the needle, and increase the rotational cutting ability. In addition, the first blade structure 111 is hidden on the side wall, which increases safety.

[0046] Further, such as Figure 2 As shown, a through hole 12 penetrating the inner and outer sides of the needle body is provided on the side wall of the needle body, the through hole 12 is connected to the proximal end of the cutting groove 11, and the connecting edge between the inner wall of the through hole 12 and the outer side of the needle body forms a second blade structure 121. When the needle moves axially, the second blade structure 121 can play a cutting role to avoid a decrease in the overall sharpness of the needle, and the second blade structure 121 is hidden on the side wall to increase safety.

[0047] At the same time, the cutting groove 11 and the through hole 12 increase the contact surface area and improve the working area of ​​the bubbles generated by the cavitation of the phacoemulsification effect. The through hole 12 can provide a pressure relief effect when the suction is blocked during the suction process, preventing the surge phenomenon generated at the moment of the blockage being released. At present, the phacoemulsification process is still the most risky link. In a narrow space, multiple factors such as ultrasonic energy, nuclei, and perfusion are rapidly intertwined in a short time and small space, coupled with the instantaneous change of energy. Especially at the moment when the phacoemulsification needle "eats" the nucleus and removes the blockage, the high negative pressure in the instrument violently sucks the liquid in the anterior chamber, and the volume of the anterior chamber decreases rapidly, which is the anterior chamber surge after the blockage is released. Since the surge occurs within the millisecond time range, compared with the time that humans can react, the surge occurs too quickly to make it difficult to intervene in time. The setting of the cutting groove 11 and the through hole 12 can prevent blockage and reduce the probability of the occurrence of the anterior chamber surge. That is to say, when there is debris blocking the distal opening in the head end 10, the cutting groove 11 and the through hole 12 on the side wall of the needle body can relieve the pressure.

[0048] Specifically, Figure 1 As shown, the needle body includes a head end 10, a needle shaft 20 and a conversion part 30 connected in sequence from the distal end to the proximal end, and the cutting groove 11 is arranged at the head end 10. The head end 10 mainly contacts the human eye lens, and the composite vibration amplitude reaches the maximum in this part for emulsifying the diseased lens. Along the axial direction, the outer diameter of each position of the needle shaft 20 is consistent, and it is a uniform tubular structure, which is a transition part connecting the head end 10 and the conversion part 30. From the proximal end to the distal end, the outer diameter of the conversion part 30 gradually decreases, which is approximately conical. A spiral groove 31 extending along the axial direction is arranged on the outer wall of the conversion part 30. The conversion part 30 is used to reflect the stress wave of the axial vibration of the ultrasonic handpiece, so that the incident wave, the reflected wave and the synthetic wave are superimposed here, and the superimposed stress wave propagates along the axial direction of the phacoemulsification needle to the head end 10 to generate composite vibration. The modal conversion part 30 of the phacoemulsification needle is located at the thicker part of the needle body, and the structural strength is high, and it is not easy to break under long-term work.

[0049] The pitch of the spiral groove 31 may range from 10 mm to 20 mm. The length of the spiral groove 31 may range from 10 mm to 15 mm. The number of spiral grooves 31 may range from 1 to 6. The depth of the spiral groove 31 may range from 20% to 40% of the maximum outer diameter of the conversion portion 30. The width of the spiral groove 31 may range from 20% to 90% of the diameter of the head end portion 10. The cross-sectional shape of the spiral groove 31 may be rectangular or triangular. Specifically, in one possible implementation, as Figure 5 As shown, the cross section of the spiral groove 31 is rectangular, the pitch of the spiral groove 31 is 20 mm, the length is 11 mm, the depth of the spiral groove 31 is 1.4 mm, the groove width is 0.3 mm, and there are 2, 3, 4, 5, or 6 spiral grooves distributed around the circumference. In another embodiment, as Figure 6 As shown, the cross section of the spiral groove 31 is triangular, the pitch of the spiral groove 31 is 20 mm, the length is 11 mm, the depth of the spiral groove 31 is 1.4 mm, the groove width is 0.76 mm, and there are 2, 3, 4, 5, and 6 spiral grooves distributed around the circumference.

[0050] A rough structure 13 may be provided on the outer surface of the tip 10 to increase friction and form a function similar to that of a file. Specifically, the rough structure 13 includes a plurality of recesses 131, and along the depth direction of the recess 131, the cross-section of the recess 131 may be in the shape of a triangle. The rough structure 13 has a triangular ring matrix gain port with a depth of 0.03-0.05 in the area 3 mm away from the needle tip, which increases the contact area between the tip 10 and the diseased lens nucleus, and at the same time increases the surface area of ​​the phacoemulsification bubble generation area, thereby improving the efficiency of phacoemulsification.

[0051] In this embodiment, the rough structure 13 is located in the area of ​​the head end 10 approximately 4 mm away from the needle tip. The rough structure 13 may include a triangular recess 131. The triangle may be an equilateral triangle with a side length controllable within the range of 0.2 mm to 0.5 mm and a depth between 0.03 mm and 0.05 mm.

[0052] In one possible implementation, Figure 3 As shown, the rough structure 13 includes at least one ring structure 132, and the ring structure 132 includes a plurality of recesses 131 arranged in sequence along the circumferential direction. The number of ring structures 132 can be distributed in a matrix of 1 to 6 circles, and each circle can be distributed with 1 to 6 recesses 131. More recesses 131 will affect the structural strength of the head end 10. Specifically, the side length of the recess 131 is 0.2 mm, and 6 recesses 131 are selected in each circle, forming a 60° circumferential angle. 1 to 6 circles (a-f) can be distributed along the axial distal end, and the spacing between each circle is 0.5 mm.

[0053] In another possible implementation, Figure 4 As shown, the rough structure 13 includes at least one spiral structure 133, and the spiral structure 133 includes a plurality of recesses 131 arranged in sequence along the spiral direction. The rough structure 13 can also be distributed with 1 to 6 spiral structures 133, each spiral structure 133 is distributed with 1 to 6 recesses 131, and the characteristic distance of each triangular recess 131 is between 0.3 and 0.6 mm. Specifically, the side length of the recess 131 is 0.2 mm, the angle of each spiral is 30°, and the distance between each recess 131 is 0.5 mm, and 1 to 6 (a-f) can be distributed circumferentially.

[0054] The distal end of the needle body is provided with a connecting portion 40, which is used to connect with the ultrasonic handpiece; the connecting portion 40 includes a clamping platform 41, a fixing plate 42 and a connecting thread 43 connected in sequence from the distal end to the tip; the cross-section of the clamping platform 41 is a quadrilateral, which facilitates the threaded connection to rotate under force, and is used to disassemble and assemble the phacoemulsification needle and the ultrasonic handpiece, and the fixing plate 42 is used to limit the depth of the connecting thread 43 entering the ultrasonic handpiece. The suction channel in the needle body is a channel that runs through the phacoemulsification needle, and is used for intraocular lens nucleus fragmentation and liquid suction.

[0055] The needle provided by the utility model has the following advantages:

[0056] The conversion part 30 has a plurality of spiral grooves 31, which are matched and designed to make the incident wave, reflected wave and synthetic wave superimposed here, and the axial vibration of the horn in the ultrasonic handle can be converted into axial and circumferential composite vibration, and axial and circumferential vibrations of different amplitudes can be achieved to a certain extent, meeting the different surgical needs of doctors.

[0057] The rough structure 13 design at the end 10 of the phacoemulsification needle tip, with different numbers and positions, can better enhance the axial impact force and torsional cutting force of the phacoemulsification needle tip when the needle tip is embedded in the lens, thereby improving the nucleus chopping ability of the phacoemulsification needle tip.

[0058] The design of the cutting groove 11 at the end portion 10 of the phacoemulsification needle can improve the nucleus chopping capability of the phacoemulsification needle and can also reduce the generation of anterior chamber surge to a certain extent.

[0059] The cataract phacoemulsification instrument provided by the utility model includes the above-mentioned composite vibration phacoemulsification needle. Because the cataract phacoemulsification instrument provided by the utility model uses the above-mentioned composite vibration phacoemulsification needle, the cataract phacoemulsification instrument provided by the utility model also has the advantages of the composite vibration phacoemulsification needle.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A composite vibration phacoemulsification needle, characterized in that: include: A needle body, wherein a cutting groove (11) is provided on the side wall of the needle body and passes through the inner and outer sides thereof, and the length direction of the cutting groove (11) is consistent with the length direction of the needle body; The distal end of the cutting groove (11) is in communication with the distal end surface of the needle body, and the connecting edge between the groove side wall of the cutting groove (11) and the outer side surface of the needle body forms a first blade structure (111).

2. The composite vibration phacoemulsification needle according to claim 1, characterized in that: A through hole (12) is provided on the side wall of the needle body and penetrates the inner and outer sides thereof; the through hole (12) is connected to the proximal end of the cutting groove (11); and the connecting edge between the inner side wall of the through hole (12) and the outer side surface of the needle body forms a second blade structure (121).

3. The composite vibration phacoemulsification needle according to claim 1, characterized in that: The needle body comprises a head end portion (10), a needle shaft portion (20) and a conversion portion (30) which are sequentially connected from the distal end to the proximal end, and the cutting groove (11) is arranged at the head end portion (10); Along the axial direction, the outer diameters of the needle rod portion (20) at various positions are consistent; The outer diameter of the conversion part (30) gradually decreases from the proximal end to the distal end, and a spiral groove (31) extending in the axial direction is provided on the outer wall of the conversion part (30).

4. The composite vibration phacoemulsification needle according to claim 3, characterized in that: The pitch of the spiral groove (31) ranges from 10 mm to 20 mm; And / or, the length of the spiral groove (31) is in the range of 10 mm to 15 mm; And / or, the number of the spiral grooves (31) ranges from 1 to 6; And / or, the depth of the spiral groove (31) is in the range of 20% to 40% of the maximum outer diameter of the conversion portion (30); And / or, the width of the spiral groove (31) is in the range of 20% to 90% of the diameter of the head end (10); And / or, the cross-section of the spiral groove (31) is in the shape of a rectangle or a triangle.

5. The composite vibration phacoemulsification needle according to claim 3, characterized in that: A rough structure (13) is provided on the outer side surface of the head end (10).

6. The composite vibration phacoemulsification needle according to claim 5, characterized in that: The rough structure (13) includes a plurality of recesses (131).

7. The composite vibration phacoemulsification needle according to claim 6, characterized in that: The rough structure (13) comprises at least one ring structure (132), and the ring structure (132) comprises a plurality of recessed portions (131) arranged in sequence along the circumferential direction; Alternatively, the rough structure (13) includes at least one spiral structure (133), and the spiral structure (133) includes a plurality of recessed portions (131) arranged in sequence along a spiral direction.

8. The composite vibration phacoemulsification needle according to claim 6, characterized in that: Along the depth direction of the recess (131), the cross-section of the recess (131) is in the shape of a triangle.

9. The composite vibration phacoemulsification needle according to claim 1, characterized in that: A connecting portion (40) is provided at the distal end of the needle body, and the connecting portion (40) is used to connect to an ultrasonic handpiece; The connecting portion (40) comprises a clamping platform (41), a fixing plate (42) and a connecting thread (43) which are sequentially connected from the distal end toward the tip; the cross section of the clamping platform (41) is in the shape of a quadrilateral.

10. A cataract phacoemulsification apparatus, characterized in that: The invention comprises the composite vibration phacoemulsification needle as described in any one of claims 1 to 9.

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