Ultrasonic suction cutter

Abstract

The utility model relates to the technical field of medical instruments, and discloses an ultrasonic suction cutter which comprises a cutter bar and a cutter head. The cutter bar is provided with a hollow channel. The cutter head is connected with the far end of the cutter bar, the hollow channel extends to penetrate through the far end of the cutter head, the cutter head comprises a first cutting part and a second cutting part which are arranged at the far end along the central axis, and the first cutting part and the second cutting part are in a ball ring shape; a first cutting edge and a second cutting edge are arranged on the outer surfaces of the first cutting part and the second cutting part respectively, and the second cutting part is close to the near end of the tool bit relative to the first cutting part. The first cutting edge and the second cutting edge can improve the cutting efficiency, important soft tissues such as blood vessels and nerves around diseased tissues are not prone to being damaged, the safety is improved, the far end of the first cutting part or the second cutting part makes contact with the soft tissues, negative pressure can be conveniently and rapidly established at the suction opening, and therefore the tissue suction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to an ultrasonic suction cutter. BACKGROUND

[0002] The ultrasonic suction cutter is a kind of medical equipment widely used in surgical operation, and it realizes tissue cutting by ultrasonic vibration and synchronously attracts debris and liquid.The core components include ultrasonic transducer, amplitude-varying rod and cutter head.The ultrasonic transducer converts electric energy into mechanical vibration, and the amplitude-varying rod amplifies vibration and transmits to cutter head, so as to realize tissue cutting.However, to ensure the suction rate, the existing ultrasonic suction cutter head is relatively sharp, and the protection of blood vessels, nerves and other tissues is poor. SUMMARY

[0003] Therefore, the utility model provides an ultrasonic suction cutter to solve the problems of low safety and low grinding efficiency of conventional ultrasonic cutter.

[0004] The utility model provides an ultrasonic suction cutter, which comprises:

[0005] The cutter rod is provided with a hollow channel;

[0006] The cutter head is connected with the distal end of the cutter rod, the hollow channel extends to the distal end of the cutter head, the cutter head comprises a first cutting part and a second cutting part arranged at the distal end along the central axis, the shapes of the first cutting part and the second cutting part are round ball ring shapes, first cutting edges and second cutting edges are respectively arranged on the outer surfaces of the first cutting part and the second cutting part, and the second cutting part is close to the proximal end of the cutter head relative to the first cutting part.

[0007] Optionally, the outer surfaces of the first cutting part and the second cutting part have a plurality of uniformly arranged pits, and the first cutting edges and the second cutting edges are formed between the plurality of pits.

[0008] Optionally, the outer surface of the first cutting part is provided with a plurality of first grooves in the circumferential direction, and the first cutting edges are formed between adjacent two first grooves; the outer surface of the second cutting part is provided with a plurality of second grooves in the circumferential direction, and the second cutting edges are formed between adjacent two second grooves.

[0009] Optionally, the outer surface of the first cutting part is provided with a plurality of first protrusions at intervals, and the first cutting edges are formed by the plurality of first protrusions; the outer surface of the second cutting part is provided with a plurality of second protrusions at intervals, and the second cutting edges are formed by the plurality of second protrusions.

[0010] Optionally, a plurality of the first protrusions are arranged along a circumferential direction of the first cutting portion to form a first tooth ring, and a plurality of groups of the first tooth rings are arranged along an axial direction of the first cutting portion to form the first cutting edge; a plurality of the second protrusions are arranged along a circumferential direction of the second cutting portion to form a second tooth ring, and a plurality of groups of the second tooth rings are arranged along an axial direction of the second cutting portion to form the second cutting edge.

[0011] Optionally, an outer surface of the second cutting portion is a smooth arc wall surface from a maximum outer diameter to a minimum outer diameter of a proximal end.

[0012] Optionally, a maximum outer diameter of the second cutting portion is greater than or equal to a maximum outer diameter of the first cutting portion.

[0013] Optionally, a third cutting portion is arranged between the first cutting portion and the second cutting portion, and the third cutting portion has the same shape as the first cutting portion.

[0014] Optionally, a maximum outer diameter of the second cutting portion is greater than or equal to a maximum outer diameter of the third cutting portion, and the maximum outer diameter of the third cutting portion is greater than or equal to the maximum outer diameter of the first cutting portion.

[0015] Optionally, a proximal end of the blade rod is provided with a mounting portion, and the hollow channel penetrates through the mounting portion.

[0016] Beneficial effects:

[0017] The ultrasonic suction cutter provided by the utility model has the advantages that the first cutting portion and the second cutting portion have the same shape, the first cutting edge and the second cutting edge are arranged on the outer surfaces of the first cutting portion and the second cutting portion respectively, the second cutting portion is arranged close to the proximal end of the cutter head relative to the first cutting portion, the first cutting portion or the second cutting portion can be attached to soft tissue when the suction port works, an almost airtight space is formed between the distal end of the first cutting portion or the second cutting portion and the soft tissue, the suction port can quickly establish negative pressure, and thus the efficiency of suctioning tissue is improved.

[0018] When working, the blade rod can transmit kinetic energy to the cutter head under the drive of the ultrasonic transducer, the hollow channel can form a suction port in the cutter head, and the ground tissue can be sucked in through the suction port and discharged through the hollow channel. Since the first cutting portion and the second cutting portion have the same shape, the first cutting edge and the second cutting edge are not easy to damage important soft tissues such as blood vessels and nerves around the diseased tissue, the safety is improved, and when the suction port works, the outer surface of the first cutting portion or the second cutting portion can be attached to the soft tissue, so that an almost airtight space is formed between the distal end of the first cutting portion or the second cutting portion and the soft tissue, the suction port can quickly establish negative pressure, and thus the efficiency of suctioning tissue is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0020] Figure 1 The structure diagram of the ultrasonic suction cutter of the present application embodiment one;

[0021] Figure 2 The cross-sectional structure diagram of the ultrasonic suction cutter of the present application embodiment one;

[0022] Figure 3 The structure diagram of the cutter head of the present application embodiment one;

[0023] Figure 4 The cross-sectional structure diagram of the cutter head of the present application embodiment one;

[0024] Figure 5 The structure diagram of the cutting edge of the present application embodiment one;

[0025] Figure 6 Another structure diagram of the cutting edge of the present application embodiment one;

[0026] Figure 7 Another structure diagram of the cutting edge of the present application embodiment one;

[0027] Figure 8 The structure diagram of the arc-shaped wall surface of the present application embodiment one;

[0028] Figure 9 The use state reference diagram of the ultrasonic suction cutter of the present application embodiment one;

[0029] Figure 10 The structure diagram of the cutter head of the present application embodiment two;

[0030] Figure 11 Another structure diagram of the cutter head of the present application embodiment two;

[0031] Figure 12 The cross-sectional structure diagram of the cutter head of the present application embodiment two.

[0032] Explanation of reference signs:

[0033] 1, head; 101, first cutting surface; 102, second cutting surface; 103, first cutting edge; 104, second cutting edge; 11, first cutting part; 111, first concave; 112, first groove; 113, first convex tooth; 12, second cutting part; 121, second concave; 122, arc wall surface; 123, second groove; 124, second convex tooth; 13, pre-suction hole; 14, third cutting part; 15, connecting part; 2, shank; 3, clamping part; 4, mounting part; 5, hollow channel; 51, suction port; 6, lesion tissue; 61, tissue. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the utility model embodiments clearer, the technical scheme in the utility model embodiments will be described clearly and completely below in combination with the drawings in the utility model embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0035] Embodiment one

[0036] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the ultrasonic suction cutter provided by the utility model comprises a shank 2 and a head 1.

[0037] The shank 2 is provided with a hollow channel 5, which can extend along the central axis of the shank 2.

[0038] The head 1 is connected to the distal end of the shank 2, the hollow channel 5 extends to the distal end of the head 1, and a suction port 51 is formed at the distal end of the head 1. The head 1 comprises a first cutting part 11 and a second cutting part 12 arranged at the distal end along the central axis, the shapes of the first cutting part 11 and the second cutting part 12 are bead ring shapes, the cross-sectional shapes of the outer surfaces of the first cutting part 11 and the second cutting part 12 are arc surfaces, and a cross-sectional view along the central axis of the shank 2 can be referred to as shown in Figure 2 The recess is formed between the first cutting part 11 and the second cutting part 12, the first cutting part 11 and the second cutting part 12 are respectively provided with first cutting edges and second cutting edges on the outer surfaces thereof, the second cutting part 12 is closer to the proximal end of the head 1 than the first cutting part 11, and the first cutting part 11 and the second cutting part 12 can be used not only for cutting off lesion tissues but also for cutting off lesion soft tissues.

[0039] In operation, the cutter bar 2 can transmit kinetic energy to the cutter head 1 under the drive of an external device, and the hollow channel 5 can form an attraction port 51 in the cutter head 1, through which the ground tissue can be sucked in and discharged through the hollow channel 5. Since the first cutting part 11 and the second cutting part 12 are in the shape of a ball ring, the first cutting edge and the second cutting edge are not easy to damage the lesion.

[0040] The important soft tissue around the tissue, that is, the soft tissue is not easy to be scratched during the movement of the first cutting part 11 and the second cutting part 12 when the ultrasonic transducer does not provide kinetic energy to the first cutting part 11 and the second cutting part 12, thereby improving the safety, and when the attraction port 51 is working, the outer surface of the first cutting part 11 or the second cutting part 12 can be attached to the soft tissue, so that the distal end of the first cutting part 11 or the second cutting part 12 forms a nearly closed space with the soft tissue, which facilitates the attraction port 51 to quickly establish negative pressure, thereby speeding up the efficiency of sucking the tissue.

[0041] In actual application, the negative pressure can be established by attaching the second cutting part 12 to the soft tissue.

[0042] As shown in Figure 5 In this embodiment, the outer surface of the first cutting part 11 and the second cutting part 12 has a plurality of uniformly arranged pits, and the first cutting edge and the second cutting edge are formed between the plurality of pits, for example, a plurality of first pits 111 are uniformly distributed on the first cutting part 11, and the first cutting surface 101 formed between the plurality of first pits 111 is the first cutting edge, and a plurality of second pits 121 are uniformly distributed on the second cutting part 12, and the second cutting surface 102 formed between the plurality of second pits 121 is the second cutting edge. Such arrangement is conducive to further reducing the damage to the surrounding soft tissue, and the surrounding soft tissue can be in contact with the cutting surface and the pit, thereby facilitating the rapid establishment of negative pressure.

[0043] As shown in Figure 6 In this embodiment, the outer surface of the first cutting part 11 is provided with a plurality of first grooves 112 in the circumferential direction, and the first cutting edge 103 formed between the adjacent two first grooves 112 is the first cutting edge, and the outer surface of the second cutting part 12 is provided with a plurality of second grooves 123 in the circumferential direction, and the second cutting edge 104 formed between the adjacent two second grooves 123 is the second cutting edge. Such arrangement is conducive to improving the grinding efficiency of the first cutting edge and the second cutting edge, and the outer wall of the first cutting edge 103 and the second cutting edge 104 is smooth and has no edges and corners, and the surrounding soft tissue can be in contact with the cutting edge and the groove, thereby improving the cutting efficiency.

[0044] As shown in Figure 7As shown, in the embodiment, the outer surface of the first cutting part 11 is provided with a plurality of first protrusions 113, which form the first cutting edge, and the outer surface of the second cutting part 12 is provided with a plurality of second protrusions 124, which form the second cutting edge. Such arrangement is conducive to improving the grinding efficiency of the first cutting edge and the second cutting edge.

[0045] As shown, Figure 7 In the embodiment, the plurality of first protrusions 113 are arranged along the circumference of the first cutting part 11 to form a first gear ring, and a plurality of first gear rings are arranged along the axial direction of the first cutting part 11 to form the first cutting edge. The plurality of second protrusions 124 are arranged along the circumference of the second cutting part 12 to form a second gear ring, and a plurality of second gear rings are arranged along the axial direction of the second cutting part 12 to form the second cutting edge. Such arrangement can improve the efficiency of absorbing tissue.

[0046] The above is a selectable type of the first cutting edge and the second cutting edge. On the same cutting head 1, the cutting edge types of the first cutting part 11 and the second cutting part 12 can be the same or a combination of any two of the above cutting edges. For example, the first cutting part 11 is provided with a plurality of first recesses 112 or a plurality of first protrusions 113, and the second cutting part 12 is provided with a plurality of second recesses 121. Thus, the first cutting edge has high cutting capacity, and the second cutting edge is relatively smooth, which can reduce damage to soft tissue and facilitate contact with soft tissue and rapid establishment of negative pressure.

[0047] In the embodiment, the outer surface of the second cutting part 12 from the maximum outer diameter to the minimum outer diameter of the proximal end is a smooth arc-shaped wall surface 122. Taking the second cutting part 12 provided with a plurality of second recesses 121 as an example, Figure 8 As shown, the maximum outer diameter of the second cutting part 12 is divided into a smooth arc-shaped wall surface 122 on the proximal end side and a plurality of second recesses 121 on the distal end side. Such arrangement can ensure that the distal end of the second cutting part 12 can effectively grind, and the proximal end of the second cutting part 12 can be easily attached to soft tissue, for example, the maximum outer diameter of the outer wall surface of the second cutting part 12 can be attached to soft tissue, thereby facilitating rapid establishment of negative pressure. Similarly, the second cutting part 12 provided with a plurality of second recesses 123 or a plurality of second protrusions 124 can also be arranged in the same way, and the proximal end of the second cutting part 12 with the maximum outer diameter can be an arc-shaped wall surface 122.

[0048] As shown, Figure 3As shown in the embodiment, the maximum outer diameter of the second cutting part 12 is greater than or equal to the maximum outer diameter of the first cutting part 11, the maximum outer diameter of the first cutting part 11 is defined as d1, the maximum outer diameter of the second cutting part 12 is defined as d2, the unit of d1 and d2 can be millimeter, when d1 and d2 are the same, it is beneficial to production and manufacturing, when d2>d1, it is beneficial to the contact of the second cutting part 12 with soft tissue and the rapid establishment of negative pressure.

[0049] In one specific embodiment of the embodiment, the size range corresponding to the first cutting part 11 of the second cutting part 12 is 1.2d1≥d2≥d1, when d2>1.2d1, the required incision channel size is too large, which is not conducive to postoperative healing, so the limit size of d2 is 1.2 times of d1.

[0050] As shown in the embodiment, Figure 1 In the embodiment, the proximal end of the knife rod 2 is provided with a mounting part 4, the shape of the mounting part 4 can be cylindrical, and the outer wall surface is provided with threads, so as to be convenient for connecting with external equipment, such as connecting with an ultrasonic handle, and a hollow channel 5 penetrates through the mounting part 4, so as to communicate with the negative pressure port of the external equipment.

[0051] As shown in the embodiment, Figure 1 In the embodiment, the proximal end of the knife rod 2 is provided with a clamping part 3, the clamping part 3 is located between the mounting part 4 and the knife rod 2, the shape of the clamping part 3 can be the same as that of a nut, so as to be convenient for clamping by a clamping device and convenient for mounting the mounting part 4 on external equipment.

[0052] As shown in the embodiment, Figure 1 and Figure 3 As shown in the embodiment, the second cutting part 12 is provided with a pre-suction hole 13, in the use process, the knife head 1 will generate heat, and the larger pieces of tissue entering the suction port 51 of the knife head 1 are easy to dry and harden due to heating, especially at the node position, larger pieces of tissue are more likely to be retained, although the suction port 51 is blocked by the tissue, the pre-suction hole 13 still provides conditions for external air to continue to enter the hollow channel 5, at the same time, there is a gap between the larger pieces of tissue and the inner wall of the hollow channel 5, under the condition that the proximal end of the hollow channel 5 provides negative pressure, there is still an air flow loop in the hollow channel 5, so that the larger pieces of tissue retained in the hollow channel 5 can be driven by the air flow and gradually sucked out, thereby avoiding the blockage of the hollow channel 5. The pre-suction hole 13 is arranged on the second cutting part 12 with a larger wall thickness, which can reduce the influence of the opening on the mechanical strength of the knife head 1 and avoid excessive stress leading to the fracture of the knife head 1.

[0053] As shown in the embodiment, Figure 1 The knife head 1 is connected with the knife rod 2 through a connecting part 15, the connecting part 15 is a rod body, and the cross-sectional size gradually decreases from the proximal end to the distal end, which is beneficial to improve the anti-vibration ability of the knife rod 2 and the knife head 1.

[0054] As Figure 9 shown, Figure 9 The use state reference figure of the ultrasonic suction knife of the embodiment is shown, it can be seen that the tool bit 1 can not only grind the pathological tissue 6, but also discharge the tissue 61 by using the hollow channel 5, in addition, the tool bit 1 can realize rapid establishment of negative pressure by contacting the soft tissue through the first cutting part 11 and the second cutting part 12.

[0055] Embodiment two

[0056] Compared with the first embodiment, the ultrasonic suction knife in the embodiment adds a third cutting part 14 on the tool bit 1, which will be described below in combination with the drawings.

[0057] As Figure 10 , Figure 11 and Figure 12 shown, in the embodiment, the third cutting part 14 is arranged between the first cutting part 11 and the second cutting part 12, the third cutting part 14 has the same shape as the first cutting part 11, the arrangement of the third cutting part 14 further increases the grinding capacity of the tool bit 1, which is conducive to further improving the grinding efficiency, the specific structure of the third cutting edge of the third cutting part 14 can refer to the structure of the first cutting edge, and there are also various cutting edge types to choose from, which will not be repeated here.

[0058] As Figure 11 shown, in the embodiment, the maximum outer diameter size of the second cutting part 12 is greater than or equal to the maximum outer diameter size of the third cutting part, the maximum outer diameter size of the third cutting part is greater than or equal to the maximum outer diameter size of the first cutting part 11, in the above example, the maximum outer diameter of the third cutting part 14 is defined as d3, the unit of d3 can be millimeter, when d1=d2=d3, it is conducive to production and manufacturing, when d2>d3>d1, it is conducive to the contact of the second cutting part 12 or the third cutting part 14 with the soft tissue, and it is convenient to quickly establish negative pressure. Of course, there are also cases of d2=d3>d1 or d2>d3=d1, as long as d2 is greater than or equal to d3, and d3 is greater than or equal to d1.

[0059] In one specific embodiment of the embodiment, the corresponding size relationship of the second cutting part 12, the third cutting part 14 and the first cutting part 11 is 1.2d3≥d2≥d3, 1.2d1≥d3≥d1, the maximum outer diameter ratio of the adjacent two cutting parts is not more than 1.2 times, so as to avoid that the required incision channel is too large, which is conducive to postoperative recovery.

[0060] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope of the appended claims.

Claims

1. An ultrasonic suction tool, characterized in that, include: The tool holder (2) is provided with a hollow channel (5); The blade head (1) is connected to the distal end of the blade shank (2). The hollow channel (5) extends through the distal end of the blade head (1). The blade head (1) includes a first cutting portion (11) and a second cutting portion (12) arranged along the central axis at the distal end. The first cutting portion (11) and the second cutting portion (12) are shaped like a bead ring. The outer surfaces of the first cutting portion (11) and the second cutting portion (12) are respectively provided with a first cutting blade and a second cutting blade. The second cutting portion (12) is closer to the proximal end of the blade head (1) than the first cutting portion (11).

2. The ultrasonic suction tool according to claim 1, characterized in that, The outer surfaces of the first cutting portion (11) and the second cutting portion (12) have a plurality of evenly arranged pits, and the first cutting edge and the second cutting edge are formed between the plurality of pits.

3. The ultrasonic suction tool according to claim 1, characterized in that, The outer surface of the first cutting part (11) is provided with a plurality of first grooves (112) along the circumferential direction, and a first cutting edge is formed between two adjacent first grooves (112); the outer surface of the second cutting part (12) is provided with a plurality of second grooves (123) along the circumferential direction, and a second cutting edge is formed between two adjacent second grooves (123).

4. The ultrasonic suction tool according to claim 1, characterized in that, The outer surface of the first cutting part (11) is provided with a plurality of first protrusions (113) spaced apart, and the plurality of first protrusions (113) form the first cutting edge; the outer surface of the second cutting part (12) is provided with a plurality of second protrusions (124) spaced apart, and the plurality of second protrusions (124) form the second cutting edge.

5. The ultrasonic suction tool according to claim 4, characterized in that, Multiple first protruding teeth (113) are arranged circumferentially along the first cutting portion (11) to form a first toothed ring, and multiple sets of first toothed rings are arranged axially along the first cutting portion (11) to form the first cutting edge; multiple second protruding teeth (124) are arranged circumferentially along the second cutting portion (12) to form a second toothed ring, and multiple sets of second toothed rings are arranged axially along the second cutting portion (12) to form the second cutting edge.

6. The ultrasonic suction tool according to any one of claims 1 to 5, characterized in that, The outer surface of the second cutting part (12) is a smooth arc-shaped wall (122) from the maximum outer diameter to the minimum outer diameter near the end.

7. The ultrasonic suction tool according to claim 6, characterized in that, The maximum outer diameter of the second cutting part (12) is greater than or equal to the maximum outer diameter of the first cutting part (11).

8. The ultrasonic suction tool according to claim 6, characterized in that, A third cutting part (14) is provided between the first cutting part (11) and the second cutting part (12), and the third cutting part (14) has the same shape as the first cutting part (11).

9. The ultrasonic suction tool according to claim 8, characterized in that, The maximum outer diameter of the second cutting part (12) is greater than or equal to the maximum outer diameter of the third cutting part (14), and the maximum outer diameter of the third cutting part (14) is greater than or equal to the maximum outer diameter of the first cutting part (11).

10. The ultrasonic suction tool according to claim 1, characterized in that, The tool holder (2) is provided with a mounting part (4) at its near end, and the hollow channel (5) passes through the mounting part (4).

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