CN215384446U - Medical cutter with water injection function - Google Patents
Medical cutter with water injection function Download PDFInfo
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- CN215384446U CN215384446U CN202121722557.8U CN202121722557U CN215384446U CN 215384446 U CN215384446 U CN 215384446U CN 202121722557 U CN202121722557 U CN 202121722557U CN 215384446 U CN215384446 U CN 215384446U
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Abstract
The utility model discloses a medical cutter with water injection function, comprising: the outer cutter tube assembly comprises an outer cutter tube and a cutter handle, the rear end of the outer cutter tube is connected with the front end of the cutter handle, and a cutting window is arranged on the tube wall of the front end of the outer cutter tube; the inner cutter tube assembly comprises an inner cutter tube, the inner cutter tube is sleeved in the outer cutter tube and can rotate relative to the outer cutter tube, and a cutting edge part is arranged at the front end of the inner cutter tube; further comprising: the water injection subassembly, the water injection subassembly is including setting up at least one water injection groove and outer tube on the outer wall of outer sword pipe, the front end opening of water injection groove is towards the front end side of outer sword pipe, the outer tube overcoat in outer sword pipe and laminating are on outer sword pipe outer wall, and the outer tube forms the water injection passageway with the water injection groove cooperation. According to the medical cutter with the water injection function, the cooling liquid can be accurately conveyed to the operation position, so that a doctor can conveniently observe the operation position; moreover, the bleeding can be prevented, and the hemostatic effect is achieved.
Description
Technical Field
The utility model relates to the field of surgical instruments, in particular to a medical cutter with a water injection function.
Background
A medical surgical device for the cutting of human tissue such as joint generally includes handle and cutter, and the cutter includes outer sword pipe and interior sword pipe, and the front end of outer sword pipe is provided with the cutting window, and interior sword intraductal cover is in outer sword, and the front end of interior sword pipe is provided with the cutting edge portion, and interior sword pipe can rotate for outer sword pipe, and cutting edge portion and cutting window cooperation will stretch into the interior tissue of cutting window and cut off. Most of cutters do not have the water injection function, and a part of cutters with the water injection function generally weld the water injection assembly on the outer side of the cutter bar or arrange a water injection channel between the outer cutter tube and the inner cutter tube. The water injection assembly is welded on the outer side of the cutter bar, so that the outer diameter of the cutter bar is obviously increased, the flexible operation of the cutter in the minimally invasive surgery is not facilitated, and the sight line can be blocked; and with the scheme of water injection passageway setting between outer sword pipe and interior sword pipe, because the water injection directly gets into interior sword inside passage, be unfavorable for forming circulation rivers at the cutter front end and let the tissue fully circulate and be taken away, in addition, water injection passageway sets up including, between the outer sword pipe, needs to have sufficient water clearance between interior sword pipe and the outer sword pipe, can cause harmful effects to the inherent planing performance and the suction performance of cutter.
Disclosure of Invention
In view of the above prior art, the technical problem to be solved by the present invention is to provide a cutting tool with water injection function, which has small influence on the outer diameter of the cutting tool, good water injection circulation effect, and no adverse effect on the inherent planing performance and suction performance of the cutting tool.
In order to solve the above technical problems, the present invention provides a medical cutting tool with a water injection function, including: the outer cutter tube assembly comprises an outer cutter tube and a cutter handle, the rear end of the outer cutter tube is connected with the front end of the cutter handle, and a cutting window is arranged on the tube wall of the front end of the outer cutter tube; the inner cutter tube assembly comprises an inner cutter tube, the inner cutter tube is sleeved in the outer cutter tube and can rotate relative to the outer cutter tube, and a cutting edge part is arranged at the front end of the inner cutter tube; further comprising: the water injection subassembly, the water injection subassembly is including setting up at least one water injection groove and outer tube on the outer wall of outer sword pipe, the front end opening orientation of water injection groove the front end side of outer sword pipe, the outer tube overcoat in outer sword pipe and laminating are in on the outer wall of outer sword pipe, the outer tube with the water injection groove cooperation forms the water injection passageway.
According to the medical cutter with the water injection function, the externally injected cooling liquid is accurately conveyed to the operation part through the water injection channel, and the injected cooling liquid can flush the human tissues tightly attached to the pipe wall of the operation area, so that a doctor can conveniently observe the operation position; moreover, water is injected through the water injection channel, the pressure is high, certain pressure can be formed at the operation position, bleeding of the operation planning wound part is prevented, the hemostatic effect can be achieved, and the endoscope is beneficial to clear visual field. In addition, the cooling liquid is tightly attached to the periphery of the tube wall for water injection, and compared with a mode of water injection in a gap between the inner knife tube and the outer knife tube, impurities which affect the visual field of the endoscope and are generated in the operation process, such as residues, exuded blood and the like can more easily form effective circulation in an operation cavity area, and the impurities are sucked and removed through a window of the inner knife head.
In one embodiment, the outer sleeve is made of a heat-shrinkable material, and the outer sleeve is tightly attached to the outer wall surface of the outer cutter tube through heat shrinkage.
In one embodiment, the outer cutter tube comprises a body and a head connected with the front end of the body, the outer diameter of the body is larger than that of the head to form a transition step, the front end opening of the water injection groove is located on the transition step, the front end of the outer sleeve is attached to the step surface of the transition step, and the cutting window is located on the tube wall of the head.
In one embodiment, the transition step comprises a first step and a second step which are sequentially connected in the direction from the rear end to the front end of the outer cutter tube, the first step is provided with a first step surface, the first step surface is connected with the outer wall surface of the body through a first transition surface, the second step is provided with a second step surface, and the second step surface is connected with the first step surface through a second transition surface.
In one embodiment, the first transition surface is an inner concave arc surface, and the second transition surface is an inclined surface.
In one embodiment, the body and the head are of a split structure, the front end of the body is provided with a connector, and the rear end of the head is fixedly sleeved on the connector.
In one embodiment, the water injection groove extends along the axial direction of the outer cutter tube or along the spiral direction.
In one embodiment, the water injection assembly further comprises a water storage cavity and a water injection joint which are formed on the cutter handle, and the water storage cavity is communicated with the rear end of the water injection channel and the water injection joint.
In one embodiment, the rear end of the outer cutter tube is provided with a smooth section without the water injection groove, and the rear end of the outer sleeve is more forward than the rear end of the water injection groove so as to expose the rear end of the water injection groove; the handle of a knife includes the handle body, front end housing assembly and rotatory cover, the front end of the handle body is fixed the ground cover and is established smooth section is last, front end housing assembly cover is established on the rear end of outer tube, just front end housing assembly with the handle body coupling, front end housing assembly with the handle body forms the annular groove, the rear end and the front end of rotatory cover are established respectively the handle body with on the front end housing assembly, and can for the handle body with the front end housing assembly is rotatory, rotatory cover will the opening in annular groove seals in order to form the water storage chamber, the water injection connects the setting and is in on the rotatory cover.
In one embodiment, the front end of the handle body is of a double-layer structure, the front end of the handle body is provided with an inner tube part and an outer tube part, the front end cover assembly comprises a sealing sleeve and a front end cover, the rear end of the sealing sleeve is sleeved on the inner tube part, the front end of the sealing sleeve is sleeved on the rear end of the outer tube, a water passing groove is formed in the sealing sleeve, the front end cover is annular, and the front end cover is sleeved on the front end of the sealing sleeve.
The advantageous effects of the additional features of the present invention will be explained in the detailed description section of the present specification.
Drawings
FIG. 1 is a perspective view of a cutter with water injection function in an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the tool with water injection shown in FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
FIG. 5 is an exploded view of the outer blade tube assembly of the cutter with water injection shown in FIG. 1;
FIG. 6 is an enlarged partial schematic view at C of FIG. 5;
fig. 7 is a perspective view illustrating an inner blade tube assembly of the cutter having a water injection function shown in fig. 1.
Description of reference numerals: 10. an outer cutter tube; 11. a body; 12. a head portion; 13. cutting a window; 14. a water injection tank; 15. a transition step; 151. a first step surface; 152. a first transition surface; 153. a second step surface; 154. a second transition surface; 16. a connector; 17. a smooth section; 20. a knife handle; 21. a handle body; 211. an inner tube portion; 212. an outer tube portion; 22. a front end cover; 23. sealing sleeves; 231. passing through a water tank; 24. a rotating sleeve; 25. a water injection joint; 27. a water storage cavity; 30. an inner cutter tube; 31. a blade portion; 40. a drive joint; 50. an outer sleeve; 61. a first O-ring seal; 62. and a second O-shaped sealing ring.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
As shown in fig. 1 to 4 and 7, the cutter with a water injection function as an example includes an outer cutter tube assembly, an inner cutter tube assembly, and a water injection assembly. The outer cutter tube component comprises an outer cutter tube 10 and a cutter handle 20, the rear end of the outer cutter tube 10 is fixed on the cutter handle 20, and a cutting window 13 is arranged on the tube wall of the outer cutter tube 10 close to the front end of the outer cutter tube. The inner cutter tube assembly comprises an inner cutter tube 30 and a transmission joint 40, the inner cutter tube 30 is arranged in the outer cutter tube 10, the front end of the inner cutter tube 30 is provided with a cutting edge part 31, the rear end of the inner cutter tube 30 extends out of the rear end of the outer cutter tube 10 to be connected with the transmission joint 40, and the transmission joint 40 is connected with a driving device (not shown in the figure). When the cutter works, the driving device drives the inner cutter tube 30 to rotate, so that the cutting edge part 31 rotates relative to the cutting window 13 to cut off human tissues extending into the cutting window 13, and in the cutting process, the rear end of the inner cutter tube 30 is connected with a suction tube (not shown in the figure) to suck the cut tissues and blood away.
As shown in fig. 5 and 6, the water injection unit includes a water injection groove 14 provided on the outer wall surface of the outer cutter tube 10 and an outer sleeve 50, and the water injection groove 14 is opened at the front end thereof toward the front end side of the outer cutter tube 10 so that the coolant is directly flushed toward the surgical site. The outer sleeve 50 is sleeved on the outer cutter tube 10 and attached to the outer wall surface of the outer cutter tube 10, and the outer sleeve 50 is matched with the water injection groove 14 to form a water injection channel. The water injection assembly adopts the structure, the externally injected cooling liquid (such as physiological saline) is accurately conveyed to the operation part through the water injection channel, and the injected cooling liquid can flush the human tissues tightly attached to the tube wall of the operation area, so that doctors can conveniently observe the operation position; moreover, water is injected through the water injection channel, the pressure is high, certain pressure can be formed at the operation position, bleeding of the operation planning wound part is prevented, the hemostatic effect can be achieved, and the endoscope is beneficial to clear visual field. In addition, the cooling liquid is tightly attached to the pipe wall of the outer knife pipe and is injected with water all around, compared with a mode of injecting water through a gap between the inner knife pipe and the outer knife pipe, impurities which affect the visual field of the endoscope and are such as residues generated in the operation process, exuded blood and the like can form effective circulation more easily in the operation cavity area, and the suction removal of the impurities through the window of the inner knife pipe is facilitated.
For example, the outer sleeve 50 is made of a heat-shrinkable polymer material, and the outer sleeve 50 is tightly attached to the outer wall surface of the outer cutter tube 10 by heat-shrinking. Thus, the thickness of the outer sleeve 50 is thinner, the increase of the outer diameter of the cutter rod is smaller, and the interference to the operation process of a doctor is avoided; moreover, the outer sleeve 50 is closely attached to the outer wall surface of the outer cutter tube 10 after being shrunk, the sealing effect is good, and the coolant can be prevented from leaking from the space between the outer sleeve 50 and the outer wall surface of the outer cutter tube 10. Of course, the outer sleeve 50 may be other plastic materials besides heat shrink.
The water injection groove 14 is exemplified as a linear type extending in the axial direction of the outer blade pipe 10, and alternatively, the water injection groove 14 may be a spiral shape extending in a spiral direction. The number of the water injection grooves 14 is exemplified as a plurality, and the plurality of water injection grooves 14 are uniformly distributed along the circumferential direction of the outer cutter tube 10. Of course, the number of the water injection grooves 14 may be one. The cross section of the water injection groove 14 as an example may be a circular arc, and alternatively, the cross section of the water injection groove 14 may be other shapes such as a rectangle, a triangle, and the like.
As shown in fig. 3 and 5, the outer cutting tube 10 as an example includes a body 11 and a head 12 connected to a front end of the body 11, an outer diameter of the body 11 is larger than an outer diameter of the head 12 to form a transition step 15, a front end opening of the water injection groove 14 is located on the transition step 15, a front end of the outer sleeve 50 is attached to a step surface of the transition step 15, and the cutting window 13 is located on a tube wall of the head 12. Thus, the height of the front opening of the water injection groove 14 is higher than that of the head part 12 where the cutting window 13 is positioned, which is beneficial to accurately spraying the injected cooling liquid at the operation position; moreover, because the outer sleeve 50 has a certain thickness, after the outer sleeve 50 is shrunk, the front end of the outer sleeve 50 is attached to the step surface of the transition step 15, so that the outer diameter of the front end of the outer sleeve 50 is smaller than that of the rest part, when the outer sleeve 50 is inserted into a human body, the outer sleeve 50 cannot form a barrier, and the human body can be conveniently inserted. In addition, the outer diameter of the head 12 is smaller than that of the body 11, so that the head can be conveniently inserted into a human body.
As an example, the transition step 15 includes a first step having a first step surface 151, the first step surface 151 being connected to the outer wall surface of the body 11 by a first transition surface 152, and a second step having a second step surface 153, the second step surface 153 being connected to the first step surface 151 by a second transition surface 154, which are sequentially connected in a rear end to front end direction of the outer cutter tube 10. The first transition surface 152 is an inner concave arc surface, and the inner concave arc surface has a gathering effect, so that water injection can be more concentrated. The second transition surface 154 is a slope, so that the front opening of the water injection channel is approximately trumpet-shaped, and the front end of the water injection groove 14 is prevented from being blocked after the outer sleeve 50 is shrunk.
As shown in fig. 5 and 6, the outer cutting tube 10 is a split structure, the body 11 and the head 12 are split structures, the front end of the body 11 is provided with a connector 16, and the rear end of the head 12 is fixedly sleeved on the connector 16. With this structure, the body 11 and the connector 16 are separately machined and then assembled together by welding. Of course, the outer blade tube 10 may be a unitary structure.
As shown in fig. 4, the water filling assembly further includes a water storage chamber 27 formed on the tool holder 20 and a water filling joint 25 communicated with the water storage chamber 27, and a rear end of the water filling passage is communicated with the water storage chamber 27. The water injection joint 25 is communicated with the water outlet of the water pump through a water injection pipe (not shown in the figure), and the cooling liquid enters the water storage cavity 27 through the water injection joint 25 and is conveyed to the operation part through a water injection channel.
Referring to fig. 4 and 5, the rear end of the outer cutter tube 10 has a smooth section 17 without the water injection groove 14, the rear end of the outer sleeve 50 is located more forward than the rear end of the water injection groove 14 to expose the rear end of the water injection groove 14, the tool holder 20 includes a handle body 21, a front cap assembly and a rotary sleeve 24, the front end of the handle body 21 is fixedly fitted over the smooth section 17, the front cap assembly is fitted over the rear end of the outer sleeve 50 and is connected to the handle body 21, the front cap assembly, the handle body 21 and the outer cutter tube 10 form an annular groove, the rear end and the front end of the rotary sleeve 24 are fitted over the handle body 21 and the front cap assembly, respectively, and are rotatable with respect to the handle body 21 and the front cap assembly, the rotary sleeve 24 closes an opening of the annular groove to form a water storage cavity 27, and the water injection joint 25 is provided on the rotary sleeve 24. Because the water injection joint 25 can rotate, the operation and use after the doctor connects the water injection pipe in the operation of very big having made things convenient for, can effectively prevent the interference of unfavorable factors such as water injection pipe winding to doctor's operation and sight through adjustment water injection interface to the dorsal surface of handle of a knife 20.
The front end of the handle 21 is a double-layer structure, the front end of the handle 21 has an inner tube 211 and an outer tube 212, the front end cap assembly includes a sealing sleeve 23 and a front end cap 22, the rear end of the sealing sleeve 23 is sleeved on the inner tube 211, the front end of the sealing sleeve 23 is sleeved on the rear end of the outer tube 50, a first O-ring 61 is arranged between the front end of the sealing sleeve 23 and the rear end of the outer tube 50, and a water passing groove 231 is arranged on the sealing sleeve 23, so that the cooling liquid can smoothly enter the water injection groove 14 on the outer knife tube 10 from the water storage cavity 27, thereby realizing water injection. In this embodiment, the inner tube 211 is provided with a fastening ring, and the rear end of the sealing sleeve 23 is provided with a fastening ring groove, which is engaged with the fastening ring. The front end cover 22 is annular, the front end cover 22 is sleeved on the front end of the sealing sleeve 23, and a second O-shaped sealing ring 62 is arranged between the front end cover 22 and the front end of the sealing sleeve 23. The sealing sleeve 23 can be made of PEI plastic materials with proper elasticity, has certain elasticity, is directly pressed into the inner pipe part 211 during assembly, and the fastening ring groove is matched with the fastening ring thread on the inner pipe part 211, so that the rotary sleeve 24 is locked by pressing the front end cover 22 in the sealing sleeve 23 and the O-shaped sealing ring, and the rotary sleeve 24 and the water injection interface positioned on the rotary sleeve can flexibly rotate along the axis of the handle body 21. When the sealing sleeve 23 needs to be taken out, the sealing sleeve can be reversely rotated and taken out.
According to the medical cutter with the water injection function, the water injection channel is integrally arranged outside the cutter bar, and compared with the mode that the water injection assembly is welded outside the cutter bar, the outer diameter of the cutter bar cannot be obviously increased; compared with the cooling channel arranged between the inner cutter tube 10 and the outer cutter tube 10, the cooling channel has better water injection circulating flushing effect, injected cooling liquid can be better flushed in a tissue planing area instead of directly entering the inner channel of the inner cutter tube 30, and then the cooling channel is sucked out from the cutting window and the connector (not shown in the figure) of the cutter handle 20 and then the suction water channel (not shown in the figure), so that the better water injection flushing effect is achieved in the arthroscopic surgery. In addition, the water injection joint 25 of the medical cutter can rotate freely, so that the operation and use of a doctor after the doctor connects a water injection pipe in an operation are greatly facilitated, and the interference of adverse factors such as winding of the water injection pipe and the like to the operation and sight of the doctor can be effectively prevented by adjusting the water injection interface to the back side surface of the cutter handle 20.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. A medical knife with water injection function comprises:
the outer cutter tube assembly comprises an outer cutter tube and a cutter handle, the rear end of the outer cutter tube is connected with the front end of the cutter handle, and a cutting window is arranged on the tube wall of the front end of the outer cutter tube;
the inner cutter tube assembly comprises an inner cutter tube, the inner cutter tube is sleeved in the outer cutter tube and can rotate relative to the outer cutter tube, and a cutting edge part is arranged at the front end of the inner cutter tube;
it is characterized by also comprising:
the water injection subassembly, the water injection subassembly is including setting up at least one water injection groove and outer tube on the outer wall of outer sword pipe, the front end opening orientation of water injection groove the front end side of outer sword pipe, the outer tube overcoat in outer sword pipe and laminating are in on the outer wall of outer sword pipe, the outer tube with the water injection groove cooperation forms the water injection passageway.
2. The medical cutter with the water injection function as claimed in claim 1, wherein the outer sleeve is made of a heat-shrinkable material, and the outer sleeve is tightly attached to the outer wall surface of the outer cutter tube through heat shrinkage.
3. The medical cutter with the water injection function as claimed in claim 1 or 2, wherein the outer cutter tube comprises a body and a head connected with the front end of the body, the outer diameter of the body is larger than that of the head to form a transition step, the front end opening of the water injection groove is positioned on the transition step, the front end of the outer sleeve is attached to the step surface of the transition step, and the cutting window is positioned on the tube wall of the head.
4. The medical cutter with the water injection function as claimed in claim 3, wherein the transition step comprises a first step and a second step which are sequentially connected in the direction from the rear end to the front end of the outer cutter tube, the first step is provided with a first step surface, the first step surface is connected with the outer wall surface of the body through a first transition surface, the second step is provided with a second step surface, and the second step surface is connected with the first step surface through a second transition surface.
5. The medical cutter with the water injection function as claimed in claim 4, wherein the first transition surface is an inner concave circular arc surface, and the second transition surface is an inclined surface.
6. The medical cutter with the water injection function as claimed in claim 3, wherein the body and the head are of a split structure, the front end of the body is provided with a connector, and the rear end of the head is fixedly sleeved on the connector.
7. The medical cutter with the water injection function as set forth in claim 1 or 2, wherein the water injection groove extends in an axial direction of the outer cutter tube or in a spiral direction.
8. The medical cutter with the water injection function as claimed in claim 1 or 2, wherein the water injection assembly further comprises a water storage cavity and a water injection joint formed on the handle, and the water storage cavity is communicated with the rear end of the water injection channel and the water injection joint.
9. The medical cutter with the water injection function according to claim 8, wherein the rear end of the outer cutter tube has a smooth section without the water injection groove, and the rear end of the outer sleeve is located forward of the rear end of the water injection groove so that the rear end of the water injection groove is exposed; the handle of a knife includes the handle body, front end housing assembly and rotatory cover, the front end of the handle body is fixed the ground cover and is established smooth section is last, front end housing assembly cover is established on the rear end of outer tube, just front end housing assembly with the handle body coupling, front end housing assembly with the handle body forms the annular groove, the rear end and the front end of rotatory cover are established respectively the handle body with on the front end housing assembly, and can for the handle body with the front end housing assembly is rotatory, rotatory cover will the opening in annular groove seals in order to form the water storage chamber, the water injection connects the setting and is in on the rotatory cover.
10. The medical cutter with the water injection function as claimed in claim 9, wherein the front end of the handle body is of a double-layer structure, the front end of the handle body is provided with an inner tube part and an outer tube part, the front end cover assembly comprises a sealing sleeve and a front end cover, the rear end of the sealing sleeve is sleeved on the inner tube part, the front end of the sealing sleeve is sleeved on the rear end of the outer tube, a water passing groove is formed in the sealing sleeve, the front end cover is annular, and the front end cover is sleeved on the front end of the sealing sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121722557.8U CN215384446U (en) | 2021-07-27 | 2021-07-27 | Medical cutter with water injection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121722557.8U CN215384446U (en) | 2021-07-27 | 2021-07-27 | Medical cutter with water injection function |
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| Publication Number | Publication Date |
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| CN215384446U true CN215384446U (en) | 2022-01-04 |
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| CN202121722557.8U Active CN215384446U (en) | 2021-07-27 | 2021-07-27 | Medical cutter with water injection function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115068050A (en) * | 2022-07-29 | 2022-09-20 | 重庆西山科技股份有限公司 | Medical grinding cutter and dynamic sealing structure thereof |
| CN115517757A (en) * | 2022-11-28 | 2022-12-27 | 成都美创医疗科技股份有限公司 | Outer knife assembly and go out water hemostasis planer tool |
-
2021
- 2021-07-27 CN CN202121722557.8U patent/CN215384446U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115068050A (en) * | 2022-07-29 | 2022-09-20 | 重庆西山科技股份有限公司 | Medical grinding cutter and dynamic sealing structure thereof |
| CN115517757A (en) * | 2022-11-28 | 2022-12-27 | 成都美创医疗科技股份有限公司 | Outer knife assembly and go out water hemostasis planer tool |
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