An ultrasonic blade testing device

Abstract

The application discloses an ultrasonic knife testing device which comprises a base, a fixing seat, a first clamping block, a second clamping block and a clamping force applying mechanism; the fixing seat is provided with a transducer fixing seat for fixing an ultrasonic knife transducer, and the fixing seat is also fixedly provided with the first clamping block; the second clamping block is arranged in correspondence with the first clamping block, and the first clamping block and the second clamping block are used together for clamping a knife rod; the clamping force applying mechanism comprises a push rod, and the push rod is used for pushing the second clamping block to move close to the first clamping block; and the surfaces of the first clamping block and the second clamping block are provided with a baffle. Different load curves are obtained by applying editable pressure curves to specified regions of the knife rod, and the load curves under different working conditions are obtained by matching different pressure curves through adjusting a test temperature, adjusting an energy output level, adjusting a clamping position, changing a baffle material and a texture, so that various load curves of the ultrasonic knife system under working conditions are reproduced.

Description

TECHNICAL FIELD

[0001] The application relates to an ultrasonic knife testing device and belongs to the technical field of medical instruments. BACKGROUND

[0002] With the development of medical technology, endoscopic surgery, as a new type of surgery, is increasingly favored by doctors and patients, and has advantages such as small surgical incisions. In laparoscopic surgery, an ultrasonic knife has been widely applied due to its good cutting and coagulation capacity, small thermal damage and other advantages.

[0003] A medical ultrasonic knife surgery system can cut, separate and coagulate tissues in surgical medical operations. It has been widely applied in laparoscopic surgery due to its advantages such as small postoperative incisions, rapid recovery and hemostasis. The ultrasonic knife surgery system mainly comprises a knife rod, a transducer and a host (an ultrasonic generator). The knife rod is connected to the transducer, and the transducer is connected to the host through a cable. The working principle is that the transducer converts the electrical energy transmitted by the host into mechanical motion ultrasonic waves, which are then transmitted to the knife rod to drive the knife rod to vibrate at a high frequency, and finally act on the tissues to cut, separate and coagulate the tissues. The applicant's prior patent application (with the publication number CN110584751A) discloses a typical structure of an ultrasonic knife.

[0004] The working environment of the ultrasonic knife is complex and changeable, and the load varies in various ways. This requires the ultrasonic knife to work effectively under various changing conditions. The use scene of the ultrasonic knife is the operating room. When the ultrasonic knife surgery system encounters an abnormal situation, the relevant information can only be recorded in the host through electrical parameters. In actual use, there are many factors that cause the ultrasonic knife surgery system to be abnormal. It is difficult for the research and development personnel to determine what causes the abnormality only according to the abnormal electrical parameters recorded by the host in the actual use process. How to reproduce the problem electrical parameter curve is the key to finding the problem and is one of the problems that must be solved by the research and development personnel to continuously improve the ultrasonic knife surgery system. There are many factors that affect the ultrasonic load curve, including the action position, system temperature, contact interface and contact force, etc. Some existing inspection devices can test a single factor, but this does not meet the actual use of the ultrasonic knife. Therefore, it is necessary to provide a testing device that can provide a testing environment closer to the actual use of the ultrasonic knife. SUMMARY

[0005] In order to simulate the actual use environment of the ultrasonic knife and better test the ultrasonic knife in various use scenarios, the application provides an ultrasonic knife testing device, and the specific technical solutions are as follows.

[0006] An ultrasonic knife testing device, characterized in that it comprises a base, a fixing seat, a first clamping block, a second clamping block and a clamping force applying mechanism.

[0007] The fixing seat is fixed to the base, and a transducer fixing seat for fixing an ultrasonic knife transducer is arranged on the fixing seat, and the first clamping block is also fixedly arranged on the fixing seat; the second clamping block is arranged in correspondence with the first clamping block, and the first clamping block and the second clamping block are used together to clamp a knife rod connected to the transducer;

[0008] The clamping force applying mechanism is arranged on the base, and the clamping force applying mechanism comprises a push rod, and the push rod is used to push the second clamping block to move close to the first clamping block.

[0009] A partition is arranged on the surface of the first clamping block facing the second clamping block, and a partition is also arranged on the surface of the second clamping block facing the first clamping block.

[0010] By using the above technical scheme, the transducer of the ultrasonic knife is fixed to the transducer fixing seat, the end of the knife rod of the ultrasonic knife is located between the first clamping block and the second clamping block, the second clamping block is pushed by the clamping force applying mechanism, so that a clamping force is applied to the knife rod to simulate the clamping force that the knife rod may receive in actual use; the partitions are arranged to provide different friction interfaces, and different friction coefficients can be obtained by using partitions made of different materials. In addition, the main machine of the ultrasonic knife operation system can provide different energy output levels for the transducer, so that various possible use conditions of the ultrasonic knife can be simulated and relevant data can be recorded.

[0011] Further, the clamping force applying mechanism comprises a linear driving mechanism, a sliding table, a force gauge and the push rod, the linear driving mechanism is fixedly arranged on the base, the linear driving mechanism is used to drive the sliding table to move along a straight line, the force gauge is fixedly arranged on the sliding table, and the force gauge is fixedly connected with the push rod. Preferably, the linear driving mechanism is a screw nut mechanism, a gear and rack mechanism, a linear motor or an air cylinder. The linear driving mechanism drives the sliding table to move, the sliding table drives the push rod to move through the force gauge, so that the first clamping block and the second clamping block clamp the knife rod, and the size of the clamping force can be obtained from the force gauge. By controlling the moving speed of the sliding table, a clamping force-time curve in the actual use of the ultrasonic knife can be simulated.

[0012] Further, the push rod comprises a first push rod and a second push rod which are sleeved with each other, the first push rod has a cavity for accommodating a spring, one end of the second push rod is also accommodated in the cavity, and the second push rod abuts against the spring. By arranging the spring in the first push rod, different elastic coefficients of the spring can be replaced for testing, which is beneficial to finding the best elastic coefficient range, so as to improve the spring for adjusting the clamping force in the ultrasonic knife.

[0013] Further, the first clamping block has a groove, and the second clamping block has a protrusion matched with the groove. The groove and the protrusion play a guiding and positioning role on the second clamping block, so that the second clamping block can be ensured not to swing or deflect when moving. The advantage of setting the groove and the protrusion is that the second clamping block does not have to be fixed on the push rod, but can be separated from the second clamping block. Only when testing, the push rod abuts against the second clamping block to provide a clamping force.

[0014] Further, the ultrasonic knife testing device further comprises a constant-temperature liquid circulation system, and fluid channels are arranged in the first clamping block and the second clamping block. The constant-temperature liquid in the constant-temperature liquid circulation system can flow in the fluid channels. The temperature of the first clamping block and the second clamping block can be artificially set through the constant-temperature liquid circulation system, so as to better simulate the ambient temperature of the ultrasonic knife in use, especially the temperature rise caused by the heat generated by the ultrasonic knife in use. The use temperature limit of the ultrasonic knife can also be tested through the constant-temperature liquid circulation system, so as to better control the use time and the output energy level of the ultrasonic knife, and prevent the serious accident of the knife rod breaking caused by the excessively high temperature. The constant-temperature liquid circulation system adopts the existing technology, such as comprising a circulating pump and a constant-temperature box. The constant-temperature box has a heating structure or a cooling structure, so as to set the temperature of the constant-temperature liquid. The circulating pump makes the constant-temperature liquid flow and circulate.

[0015] Further, the ultrasonic knife testing device further comprises a controller electrically connected with the constant-temperature liquid circulation system, the force gauge and the main machine of the ultrasonic knife. The controller can be used to control the temperature of the constant-temperature liquid of the constant-temperature liquid circulation system and the energy output level of the main machine, and record the clamping force curve of the force gauge with time.

[0016] Further, a waist-shaped hole is arranged on the fixing seat, the transducer fixing seat is fixed to the fixing seat through a fastener, and the fastener passes through the waist-shaped hole. Through the arrangement of the waist-shaped hole, the position of the transducer fixing seat can be adjusted, so that the position of the transducer is adjusted, so that the test position of the knife rod can be accurately aligned with the first clamping block and the second clamping block.

[0017] The present application can obtain different load curves by applying an editable pressure curve to a specified area of the knife rod, and can obtain load curves under different working conditions by adjusting the test temperature, adjusting the energy output level, adjusting the clamping position, changing the material and texture of the spacer, and matching different pressure curves. Various load curves of the ultrasonic knife system in the working state are reproduced. It is convenient for researchers to improve and research afterwards. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of the ultrasonic knife testing device of the present application;

[0019] Figure 2 is a partial schematic view of the ultrasonic knife testing device;

[0020] Figure 3 is a schematic view of the ultrasonic knife testing;

[0021] Figure 4 is Figure 2 is an enlarged schematic view of the A area in

[0022] Figure 5 is a cross-sectional schematic view of the first clamping block and the second clamping block;

[0023] Figure 6 is a schematic view of the ultrasonic knife blade rod.

[0024] In the figure: base 1, fixed seat 2, waist-shaped hole 2.1, first clamping block 3, groove 3.1, second clamping block 4, protrusion 4.1, transducer 5, transducer fixing seat 6, blade rod 7, mark 7.1, main machine 8, spacer 9, sliding table 10, force gauge 11, push rod 12, first push rod 12.1, second push rod 12.2, screw nut mechanism 13, spring 14, cavity 15, constant temperature liquid circulation system 16, fluid channel 17, controller 18. DETAILED DESCRIPTION

[0025] The application will be further described in detail below with reference to the accompanying drawings.

[0026] Referring to Figures 1-6 , an ultrasonic knife testing device, comprising a base 1, a fixed seat 2, a first clamping block 3, a second clamping block 4 and a clamping force applying mechanism;

[0027] The fixed seat 2 is fixed to the base 1, and the fixed seat 2 is provided with a transducer fixing seat 6 for fixing the ultrasonic knife transducer 5, and the fixed seat 2 is also fixedly provided with the first clamping block 3; the fixed seat 2 is provided with a waist-shaped hole 2.1, and the transducer fixing seat 6 is fixed to the fixed seat 2 by fasteners (not shown, such as screws), and the fasteners pass through the waist-shaped hole 2.1; by providing the waist-shaped hole, the position of the transducer fixing seat 6 can be adjusted, so that the position of the transducer 5 is adjusted, so that the testing position of the blade rod 7 connected to the transducer 5 can be accurately aligned with the first clamping block 3 and the second clamping block 4.

[0028] The second clamping block 4 is arranged corresponding to the first clamping block 3, and the first clamping block 3 and the second clamping block 4 are used to clamp the blade bar 7 connected to the transducer 5. The surface of the first clamping block 3 towards the second clamping block 4 is provided with a spacer 9, and the surface of the second clamping block 4 towards the first clamping block 3 is also provided with a spacer 9. The spacer 9 is made of flexible material with good heat conduction performance and good wear resistance. The spacer 9 can be fixed on the clamping block by pasting. The spacer 9 can be made of cloth or other flexible material. Different friction interfaces can be obtained by replacing different spacers 9, and different friction coefficients can be simulated. Preferably, the first clamping block 3 has a groove 3.1, and the second clamping block 4 has a protrusion 4.1 matched with the groove 3.1. The groove 3.1 and the protrusion 4.1 guide and position the second clamping block 4, so that the second clamping block 4 cannot swing or deflect when moving. Because the groove and the protrusion are arranged, the second clamping block 4 can be kept with the first clamping block 3 even when the first clamping block 3 and the second clamping block 4 do not clamp the blade bar 7. The first clamping block 3 and the second clamping block 4 have a profile matched with the blade bar 7.

[0029] As shown in Figure 6 , the blade bar 7 has a mark 7.1 with a wave crest and a wave trough. When the transducer 5 is installed on the fixing seat 2, the position of the blade bar 7 relative to the two clamping blocks is accurate. The wave crest is the place with the maximum amplitude, and the wave trough is the place with the zero amplitude. The host 8 sends an electrical signal, which is converted into mechanical vibration through the transducer 5. The end of the transducer is equipped with a blade bar (which is actually an amplitude transformer). Different vibration frequencies and amplitudes can be obtained by changing the size, shape and material of the blade bar.

[0030] The clamping force applying mechanism includes a linear driving mechanism, a sliding table 10, a force gauge 11 and a push rod 12. The linear driving mechanism can be a screw nut mechanism, a gear and rack mechanism, a linear motor or an air cylinder, etc. Figures 1-2 The screw nut mechanism 13 is fixedly arranged on the base 1. The screw nut mechanism 13 is used to drive the sliding table 10 to move linearly. The force gauge 11 is fixedly arranged on the sliding table 10, and the force gauge 11 is fixedly connected with the push rod 12. The screw nut mechanism 13 drives the sliding table 10 to move. The sliding table 10 drives the push rod 12 to move through the force gauge 11. The push rod 12 pushes the second clamping block 4, so that the first clamping block 3 and the second clamping block 4 clamp the blade bar 7. The size of the clamping force can be obtained from the force gauge 11. By controlling the moving speed and the starting point of the sliding table 10, the clamping force-time curve in the actual use of the ultrasonic knife can be simulated. Those skilled in the art can understand that the second clamping block 4 can be fixedly connected with the push rod 12, or can be in a separate state with the push rod 12. The push rod 12 can push the second clamping block 4 when moving.

[0031] Preferably, the push rod 12 comprises a first push rod 12.1 and a second push rod 12.2 which are sleeved with each other, the first push rod 12.1 has a cavity 15 accommodating the spring 14, one end of the second push rod 12.2 is also accommodated in the cavity 15 and the second push rod 12.2 abuts against the spring 14. By arranging the spring 14 in the first push rod 12.1, it is convenient to replace springs 14 with different elastic coefficients for testing, and it is beneficial to find out the optimal elastic coefficient interval so as to improve the spring used for adjusting the clamping force in the ultrasonic knife.

[0032] The ultrasonic knife testing device further comprises a constant temperature liquid circulation system 16, fluid channels 17 are arranged in the first clamping block 3 and the second clamping block 4, and constant temperature liquid (not shown) in the constant temperature liquid circulation system 16 can flow in the fluid channels 17. The first clamping block 3 and the second clamping block 4 are made of copper or other metal or non-metal materials with high thermal conductivity. The temperature of the first clamping block 3 and the second clamping block 4 can be artificially set by the constant temperature liquid circulation system, so as to better simulate the ambient temperature of the ultrasonic knife in use, especially the temperature rise caused by the heat generated by the ultrasonic knife in use. The use temperature limit of the ultrasonic knife can also be tested by the constant temperature liquid circulation system, so as to better control the use time and output energy level of the ultrasonic knife, and prevent the occurrence of serious accidents such as the breakage of the knife rod caused by excessive temperature. The constant temperature liquid circulation system 16 adopts the existing technology, such as comprising a circulating pump (not shown) and a constant temperature box (not shown), the constant temperature box has heating structure or cooling structure to set the temperature of the constant temperature liquid, and the circulating pump makes the constant temperature liquid flow and circulate.

[0033] The ultrasonic knife testing device further comprises a controller 18 which is electrically connected with the constant temperature liquid circulation system 16, the force gauge 11 and the main machine 8 of the ultrasonic knife. The controller 18 can be used to control the temperature of the constant temperature liquid of the constant temperature liquid circulation system 16 and the energy output level of the main machine 8, and record the clamping force curve of the force gauge 11 with time. The main machine 8 controls the energy output level of the transducer 5, thereby obtaining different vibration amplitudes, and thereby obtaining different mechanical loads under different vibration amplitudes.

[0034] The connection of the force gauge 11 and the controller 18 can record the data of the pushing force in real time. The sliding table 10 drives the movement of the force gauge 11, thereby driving the movement of the push rod 12, thereby changing the compression amount of the spring 14, and further changing the acting force of the push rod 14 on the second clamping block 4.

[0035] The controller 18 can control the position and movement speed of the sliding table 10. By controlling the position and movement speed of the sliding table, different pressure curves can be obtained. In the case that the septum 9 and the electrical output parameters remain unchanged and the transducer and the knife rod do not change, the corresponding ultrasonic load curve can be obtained.

[0036] Different friction interfaces can be obtained by replacing the spacer 9, and the influence of different base temperatures on ultrasonic vibration can be simulated by changing the temperature of the circulating constant-temperature liquid. The actual working conditions can be simulated by changing the energy output level of the host and different mechanical loads.

[0037] The embodiments of the present application are described above with reference to the drawings, and the embodiments and features in the embodiments can be combined with each other without conflict. The specific embodiments described above are only illustrative, and are not limiting. Those skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, and these are all within the protection scope of the present application.

Claims

1. An ultrasonic scalpel testing device, characterized in that, It includes a base (1), a fixed seat (2), a first clamping block (3), a second clamping block (4), and a clamping force application mechanism; The fixing seat (2) is fixed to the base (1). The fixing seat (2) is provided with a transducer fixing seat (6) for fixing the transducer (5). The fixing seat (2) is also fixed with the first clamping block (3). The second clamping block (4) is provided corresponding to the first clamping block (3). The first clamping block (3) and the second clamping block (4) are used together to clamp the knife bar (7) connected to the transducer (5). The clamping force application mechanism is disposed on the base (1), and the clamping force application mechanism includes a push rod (12), which is used to push the second clamping block (4) to move closer to the first clamping block (3); The surface of the first clamping block (3) facing the second clamping block (4) is provided with a partition (9), and the surface of the second clamping block (4) facing the first clamping block (3) is also provided with a partition (9); The first clamping block (3) has a groove (3.1), and the second clamping block (4) has a protrusion (4.1) that matches the groove (3.1). The ultrasonic scalpel testing device also includes a constant temperature liquid circulation system (16), and fluid channels (17) are provided in both the first clamping block (3) and the second clamping block (4), and the constant temperature liquid in the constant temperature liquid circulation system (16) can flow in the fluid channels (17).

2. The ultrasonic scalpel testing device according to claim 1, characterized in that, The clamping force application mechanism includes a linear drive mechanism, a slide (10), a force gauge (11), and a push rod (12). The linear drive mechanism is fixedly mounted on the base (1) and is used to drive the slide (10) to move in a straight line. The force gauge (11) is fixedly mounted on the slide (10) and is fixedly connected to the push rod (12).

3. The ultrasonic scalpel testing device according to claim 2, characterized in that, The linear drive mechanism is a lead screw and nut mechanism (13), a gear and rack mechanism, a linear motor, or a cylinder.

4. The ultrasonic scalpel testing device according to claim 2, characterized in that, The push rod (12) includes a first push rod (12.1) and a second push rod (12.2) that are sleeved together. The first push rod (12.1) has a cavity (15) for accommodating a spring (14). One end of the second push rod (12.2) is also accommodated in the cavity (15) and abuts against the spring (14).

5. The ultrasonic scalpel testing device according to claim 2, characterized in that, The ultrasonic scalpel testing device also includes a controller (18), which is electrically connected to the constant temperature liquid circulation system (16), the force gauge (11), and the main unit (8) of the ultrasonic scalpel.

6. The ultrasonic scalpel testing device according to claim 1, characterized in that, The mounting base (2) has an oblong hole (2.1), and the transducer mounting base (6) is fixed to the mounting base (2) by fasteners, which pass through the oblong hole (2.1).

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