Blunt cartilage filling device and surgical vehicle with the device

Abstract

The present invention relates to a blunt-tipped cartilage filling device and a surgical vehicle with the device. The device comprises a hard hollow rod, a blunt-tipped scraper and a handle. A hollow channel is arranged at the center of the hard hollow rod. The blunt-tipped scraper is fixedly arranged at the first end of the hard hollow rod; the blunt-tipped scraper comprises a blunt-tipped flattening disk and a through hole arranged at the center of the blunt-tipped flattening disk; the handle is sleeved and fixed on the hard hollow rod, and the second end of the hard hollow rod passes through the handle; an inlet is opened axially at the second end, and the inlet is used to communicate with an injection device, so that the separated and collected cartilage tissue of the patient himself or the cartilage tissue cultured in a laboratory is directly filled into the cartilage injury site of the patient through the inlet at the second end of the hard hollow rod, the hollow channel of the hard hollow rod and the through hole at the center of the blunt-tipped flattening disk of the blunt-tipped scraper in sequence; the blunt-tipped scraper is used to scrape and compact the cartilage tissue filled into the cartilage injury site of the patient.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a blunt cartilage filling device and a surgical vehicle with the device. Background Art

[0002] In clinical practice, cartilage tissue fragments are often generated during surgery on the knee joint, shoulder joint and other parts. In the prior art, on the one hand, the cartilage tissue fragments generated during the operation are introduced into a waste bucket together with the liquid and discarded, and the separation and reuse of the cartilage tissue fragments cannot be achieved; on the other hand, it is necessary to culture cartilage filling tissue in the laboratory to fill the patient's cartilage damage. This culture process takes more than one month, which is time-consuming and inconvenient. Especially when performing surgery in a field environment (such as during military operations or disaster relief), there are no conditions to meet the time-consuming requirement of culturing cartilage filling tissue, which causes serious difficulties for the operation.

[0003] A mobile operating vehicle is a special vehicle commonly used to facilitate doctors to perform surgery in a field environment. Generally, a mobile operating vehicle is equipped with relatively complete surgical facilities to meet general surgical needs. However, the mobile operating vehicle in the prior art does not have the function of separating and filling cartilage tissue, and the support for some special surgeries is not complete enough, and there is room for improvement.

[0004] After a lot of experiments and research and development, the applicant has developed a cartilage tissue separation device, which can be used in conjunction with a mobile operating vehicle to separate and collect the patient's own cartilage tissue. However, after the patient's own cartilage tissue is separated and collected, there is still a lack of supporting equipment for how to fill it into the patient's cartilage damage area. In the prior art, laboratory-cultured cartilage filling tissue is usually manually filled into the patient's cartilage damage area by a doctor, and the tools used are usually conventional tools used in surgery, such as scalpels, bone knives, bone files, scrapers, etc., and there are no special tools. The disadvantages of these conventional tools are that they have sharp blades, which can easily injure the patient, and they are not convenient to use, resulting in an uneven filling area and inability to be effectively compacted. Summary of the invention

[0005] The present invention aims to provide a blunt-tip cartilage filling device and a surgical vehicle with the device. The technical problems to be solved include at least how to combine the blunt-tip cartilage filling device with a mobile surgical vehicle, so that the patient's own cartilage tissue can be separated and collected and directly filled into the patient's cartilage injury site, or the cartilage filling tissue cultured in the laboratory can be directly filled into the patient's cartilage injury site, while ensuring that the filling site is flat, convenient and effective compaction can be achieved to avoid harming the patient.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a blunt-head cartilage filling device, comprising a hard hollow rod, a blunt-head scraper and a handle, wherein the center of the hard hollow rod is provided with a hollow channel extending along the axial direction, and the blunt-head scraper is fixedly arranged at the first end portion of the hard hollow rod; the blunt-head scraper comprises a blunt-head flattening disk and a through hole arranged at the center position of the blunt-head flattening disk, and the through hole is connected to the hollow channel of the hard hollow rod; the handle is sleeved and fixed on the hard hollow rod, and the second end portion of the hard hollow rod passes through the handle. The handle is exposed on the outside of the handle; an inlet is axially opened at the second end portion, and the inlet is used to communicate with an injection device, through which the separated and collected cartilage tissue of the patient himself or the cartilage tissue cultured in the laboratory is directly filled into the cartilage injury site of the patient through the inlet at the second end portion of the hard hollow rod, the hollow channel of the hard hollow rod and the through hole at the center position of the blunt flattening disk of the blunt scraper; the blunt scraper is used to scrape and compact the cartilage tissue filled into the cartilage injury site of the patient.

[0007] Preferably, the angle α between the blunt flattening disk and the hard hollow rod is greater than 0 degrees and less than 90 degrees.

[0008] Preferably, the blunt flattening disc and the hard hollow rod are connected together by welding.

[0009] Preferably, the blunt flattening disc and the hard hollow rod are an integrally formed structure.

[0010] Preferably, the blunt flattening disc is circular or oval.

[0011] Preferably, the edge positions of the blunt flattening disc are all passivated and have no sharp edges.

[0012] Preferably, the handle comprises a truncated cone portion, a cylindrical portion and a disc portion, and the cylindrical portion is fixedly connected between the truncated cone portion and the disc portion.

[0013] Preferably, the outer diameter of the cylindrical portion is smaller than the outer diameter of the disc portion, and is also smaller than the outer diameter of the bottom surface of the truncated cone portion.

[0014] The present invention also provides a mobile surgical vehicle with the blunt-tipped cartilage filling device, comprising a mechanical arm for generating thrust, wherein the thrust generated by the mechanical arm is used to push the injection device, so that the injection device can directly fill the separated and collected patient's own cartilage tissue or laboratory-cultured cartilage tissue into the patient's cartilage injury site through the inlet at the second end of the hard hollow rod, the hollow channel of the hard hollow rod and the through hole at the center position of the blunt flattening disk of the blunt-tipped scraper.

[0015] Preferably, the thrust generated by the mechanical arm conforms to a thrust function, and the thrust function is specifically:

[0016]

[0017] Wherein, F is the thrust generated by the robotic arm, in Newton;

[0018] h is the thickness of the cartilage tissue that is filled in the patient's cartilage injury site and scraped and compacted, in millimeters.

[0019] Beneficial Effects

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The blunt-tip cartilage filling device of the present invention can directly fill the separated and collected cartilage tissue of the patient or the cartilage filling tissue cultured in the laboratory into the cartilage injury site of the patient, while ensuring that the filling site is flat and convenient for effective compaction. The top of the blunt-tip cartilage filling device is a blunt-tip structure, and the outlet is set on the side, which can avoid hurting the patient.

[0022] The blunt cartilage filling device of the present invention can be used in combination with a mobile surgical vehicle, which is convenient for performing surgery in a field environment. The thrust generated by the mechanical arm of the mobile surgical vehicle conforms to the thrust function, which can prevent the cartilage tissue flowing out of the through hole 22 from splashing when it contacts the cartilage injury site of the patient. During the filling process, the cartilage tissue filled into the cartilage injury site of the patient has a buffering effect. The thrust function comprehensively considers the problems of cartilage tissue splashing and filling speed. By gradually increasing the thrust generated by the mechanical arm, the filling speed is guaranteed while avoiding the splashing of cartilage tissue. When the filling is in the later stage, the thrust function makes the thrust generated by the mechanical arm tend to be stable, which can prevent the cartilage tissue from overflowing from the filling site. The separated and collected patient's own cartilage tissue or the cartilage filling tissue cultured in the laboratory are precious medical supplies. The splashing generated during the filling process or the later overflow from the filling site will cause great waste, and will cause medical environmental pollution, and it is also troublesome to clean up. The blunt cartilage filling device of the present invention can perfectly solve the above problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the specific implementation methods of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0024] Figure 1 It is a schematic structural diagram of the blunt cartilage filling device of the present invention.

[0025] Figure 2It is a front view of the blunt-head scraper described in the present invention.

[0026] Figure 3 is the fitting curve of the thrust function. DETAILED DESCRIPTION

[0027] The present invention is described in more detail hereinafter to facilitate understanding of the present invention.

[0028] like Figures 1 to 3 As shown, the blunt cartilage filling device of the present invention comprises a hard hollow rod 1, a blunt scraper 2 and a handle 3, wherein the center of the hard hollow rod 1 is provided with a hollow channel extending along the axial direction, and the blunt scraper 2 is fixedly arranged at the first end portion of the hard hollow rod 1; the blunt scraper 2 comprises a blunt flattening disk 21 and a through hole 22 arranged at the center position of the blunt flattening disk 21, and the through hole 22 is connected with the hollow channel of the hard hollow rod 1; the handle 3 is sleeved and fixed on the hard hollow rod 1, and the second end portion 11 of the hard hollow rod 1 passes through the handle 3. The handle 3 is exposed on the outside of the handle 3; the second end portion 11 is axially provided with an inlet, which is used to be connected to an injection device, through which the separated and collected cartilage tissue of the patient himself or the cartilage tissue cultured in the laboratory is directly filled into the cartilage injury site of the patient through the inlet of the second end portion 11 of the hard hollow rod 1, the hollow channel of the hard hollow rod 1 and the through hole 22 at the center position of the blunt flattening disk 21 of the blunt scraper 2; the blunt scraper 2 is used to scrape and compact the cartilage tissue filled into the cartilage injury site of the patient.

[0029] Preferably, an internal thread is provided on the inner wall of the injection port of the second end portion 11 for connecting with the injection device through the thread.

[0030] Preferably, an external thread is provided on the outer wall of the injection port of the second end portion 11 for connecting with the injection device through the thread.

[0031] Preferably, the angle α between the blunt flattening disc 21 and the hard hollow rod 1 is greater than 0 degrees and less than 90 degrees.

[0032] Figure 1 The angle α between the blunt flattening disk 21 and the hard hollow rod 1 is described by an imaginary extension line 23 of the blunt flattening disk 21 .

[0033] By limiting the angle α to be greater than 0 degrees and less than 90 degrees, the outlet of the blunt-tip cartilage filling device of the present invention is set on the side, and the top of the blunt-tip cartilage filling device is a blunt-tip structure, which can avoid harming the patient. Different angles α can adapt to different surgical positions, and doctors can choose the appropriate angle α according to specific surgical conditions.

[0034] Preferably, the blunt flattening disc 21 and the hard hollow rod 1 are connected together by welding.

[0035] Preferably, the blunt flattening disc 21 and the hard hollow rod 1 are an integrally formed structure.

[0036] Preferably, the blunt flattening disc 21 is circular or oval.

[0037] Preferably, the edge positions of the blunt flattening disc 21 are all passivated and have no sharp edges.

[0038] Preferably, the handle 3 comprises a truncated cone portion 31 , a cylindrical portion 32 and a disc portion 33 , and the cylindrical portion 32 is fixedly connected between the truncated cone portion 31 and the disc portion 33 .

[0039] Preferably, the outer diameter of the cylindrical portion 32 is smaller than the outer diameter of the disc portion 33 , and is also smaller than the outer diameter of the bottom surface of the truncated cone portion 31 .

[0040] The above structure of the handle 3 is convenient for doctors to hold, and it is easier to apply force when using the blunt-tip cartilage filling device of the present invention to scrape and compact the cartilage tissue filled into the cartilage injury site of the patient.

[0041] Preferably, the hard hollow rod 1 and the blunt scraper 2 are made of stainless steel, and the handle 3 is made of acrylonitrile-butadiene-styrene plastic or KRO-3 resin.

[0042] The present invention also provides a mobile surgical vehicle with the blunt-tipped cartilage filling device, comprising a mechanical arm for generating thrust, wherein the thrust generated by the mechanical arm is used to push the injection device, so that the injection device can directly fill the separated and collected patient's own cartilage tissue or laboratory-cultured cartilage tissue into the patient's cartilage injury site through the inlet port 11 of the second end portion 1 of the hard hollow rod 1, the hollow channel of the hard hollow rod 1 and the through hole 22 at the center position of the blunt flattening disk 21 of the blunt-tipped scraper 2.

[0043] Preferably, the thrust generated by the mechanical arm conforms to a thrust function, and the thrust function is specifically:

[0044]

[0045] Wherein, F is the thrust generated by the robotic arm, in Newton;

[0046] h is the thickness of the cartilage tissue that is filled in the patient's cartilage injury site and scraped and compacted, in millimeters.

[0047] The thrust function is a fitting curve formula fitted based on a large amount of test data. Since the blunt cartilage filling device needs to connect the inlet to the injection device when in use, the through hole 22 at the center of the blunt flattening disk 21 of the blunt scraper 2 is inserted into the cartilage injury site of the patient. At the beginning, the thrust generated by the mechanical arm cannot be too large, otherwise the cartilage tissue flowing out of the through hole 22 will have too large an initial velocity, and then the cartilage tissue flowing out of the through hole 22 will splash when it contacts the cartilage injury site of the patient. As the filling proceeds, the doctor uses the smooth surface (plane) of the blunt flattening disk 21 of the blunt scraper 2 to scrape and compact the cartilage tissue filled into the cartilage injury site of the patient. The cartilage tissue filled into the cartilage injury site of the patient itself has a buffering effect, and the thrust generated by the mechanical arm can be gradually increased at this time. The experimental results show that when the filling is carried out to the later stage, the thrust generated by the mechanical arm needs to be stabilized to prevent the cartilage tissue from overflowing from the filling site.

[0048] Clinically, a tiny channel is usually opened on the patient's skin in the form of minimally invasive surgery, such as a small hole is opened at the lacquer joint, and a blunt-head scraper 2 is inserted into the patient's cartilage injury site through the small hole. The internal condition of the patient's cartilage injury site can be observed with the help of imaging methods such as arthroscopy.

[0049] In order to obtain sufficiently accurate thrust, the applicant conducted a large number of clinical trials. During the test, the thrust generated by the suction device was gradually increased in an arithmetic progression, and the cartilage tissue filled in the cartilage injury site of the patient was observed through an arthroscopy to see whether splashing occurred. The thrust when the cartilage tissue just splashed and the thickness of the cartilage tissue that had been filled in the cartilage injury site of the patient and scraped and compacted were recorded (the cartilage injury site of the patient without filling the cartilage tissue was taken as the starting point with a thickness of 0), the thrust values ​​and thickness values ​​were listed in a rectangular coordinate system, and fitted by SCILAB software to form Figure 3 The curve shown in FIG. 1 , the function corresponding to the curve is the thrust function.

[0050] It should be pointed out that the units (millimeter, Newton) of the physical quantities in the thrust function (the thickness h of the cartilage tissue filled in the cartilage injury site of the patient and scraped and compacted, the thrust F generated by the robotic arm) are only used to indicate the magnitude of the values ​​and do not participate in the calculations in the formula. This is because the thrust function is a fitting function obtained by data fitting, rather than a physical formula or mathematical formula obtained by strict mathematical derivation. For example, assuming that h is 10 mm, if the unit is changed to centimeter, then h becomes 1 centimeter, and the unit "millimeter" is only used to indicate the magnitude of the value "10" and does not participate in the calculations in the function. If the unit "millimeter" is not limited to the formula, it may cause technicians in this field to use the value "1 centimeter" into the formula calculation and obtain confusing calculation results. The unit "Newton" is the same and does not participate in the calculations in the formula.

[0051] When the blunt cartilage filling device of the present invention is used, firstly, the separated and collected cartilage tissue of the patient himself or the cartilage tissue cultured in the laboratory is loaded into the injection device, the inlet of the second end 11 of the hard hollow rod 1 is connected to the injection device, the through hole 22 at the center of the blunt flattening disk 21 of the blunt scraper 2 is inserted into the cartilage injury site of the patient, and the mechanical arm is started. The thrust generated by the mechanical arm conforming to the thrust function pushes the injection device, so that the injection device directly fills the separated and collected cartilage tissue of the patient himself or the cartilage tissue cultured in the laboratory into the cartilage injury site of the patient through the inlet of the second end 11 of the hard hollow rod 1, the hollow channel of the hard hollow rod 1 and the through hole 22 at the center of the blunt flattening disk 21 of the blunt scraper 2. During the filling process, the doctor can use the blunt flattening disk 21 of the blunt scraper 2 to scrape and compact the cartilage tissue filled into the cartilage injury site of the patient.

[0052] When it is observed through arthroscopy or other imaging methods that the patient's cartilage damage has been filled to the appropriate position, the robotic arm can be closed.

[0053] The above describes the preferred embodiments of the present invention, but it is not intended to limit the present invention. Those skilled in the art may make improvements and changes to the embodiments disclosed herein without departing from the scope and spirit of the present invention.

Claims

1. A blunt cartilage filling device, characterized in that: The blunt-head cartilage filling device comprises a hard hollow rod, a blunt-head scraper and a handle, wherein a hollow channel extending along the axial direction is arranged at the center of the hard hollow rod, and the blunt-head scraper is fixedly arranged at the first end of the hard hollow rod; the blunt-head scraper comprises a blunt-head flattening disk and a through hole arranged at the center of the blunt-head flattening disk, and the through hole is connected with the hollow channel of the hard hollow rod; the handle is fixedly mounted on the hard hollow rod, and the second end of the hard hollow rod passes through the handle and is exposed at The outside of the handle; the second end portion is provided with an inlet in the axial direction, and the inlet is used to communicate with an injection device, through which the separated and collected cartilage tissue of the patient or the cartilage tissue cultured in the laboratory is directly filled into the cartilage injury site of the patient through the inlet of the second end portion of the hard hollow rod, the hollow channel of the hard hollow rod and the through hole at the center position of the blunt flattening disk of the blunt scraper in sequence; the blunt scraper is used to scrape and compact the cartilage tissue filled into the cartilage injury site of the patient; The edges of the blunt flattening disc are all passivated and have no sharp edges; The handle comprises a truncated cone portion, a cylindrical portion and a disc portion, wherein the cylindrical portion is fixedly connected between the truncated cone portion and the disc portion; The outer diameter of the cylindrical portion is smaller than the outer diameter of the disc portion and also smaller than the outer diameter of the bottom surface of the truncated cone portion; The blunt-tip cartilage filling device further comprises a mobile surgical vehicle, which comprises a mechanical arm for generating thrust, wherein the thrust generated by the mechanical arm is used to push the injection device, so that the injection device directly fills the separated and collected cartilage tissue of the patient himself or the cartilage tissue cultured in the laboratory into the cartilage injury site of the patient through the injection port at the second end of the hard hollow rod, the hollow channel of the hard hollow rod and the through hole at the center position of the blunt flattening disk of the blunt-tip scraper in sequence; The thrust generated by the mechanical arm conforms to the thrust function, which is specifically: ； Wherein, F is the thrust generated by the robotic arm, in Newton; h is the thickness of the cartilage tissue that is filled in the patient's cartilage injury site and scraped and compacted, in millimeters.

2. The blunt cartilage filling device according to claim 1, characterized in that: The included angle α between the blunt flattening disk and the hard hollow rod is greater than 0 degrees and less than 90 degrees.

3. The blunt cartilage filling device according to claim 1, characterized in that: The blunt flattening disc and the hard hollow rod are connected together by welding.

4. The blunt cartilage filling device according to claim 1, characterized in that: The blunt flattening disc and the hard hollow rod are an integrally formed structure.

5. The blunt cartilage filling device according to claim 1, characterized in that: The blunt flattening disc is circular or oval.

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