Medical water jet scalpel
By designing limit blocks and suction components in medical water jets, precise absorption and recycling of overflow water flow is achieved, and the problems of overflow and accumulation of water flow are solved, and surgical efficiency and safety are improved.
Patent Information
- Application Number
- CN202420572970.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-22
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-03-22
AI Technical Summary
The existing oblique angle water jets are difficult to effectively recover in medical operations, resulting in overflow and accumulation of water flow, affecting the surgical field and increasing the difficulty of the surgery.
A medical water jet is designed, including a shell, a return pipe, a limit block and a suction assembly. Through the cooperation of the limit block and a suction assembly, the precise absorption and recovery of the overflow flow is achieved.
It effectively reduces the possibility that the surgical field is affected by residues, keeps the surgical field clear, and reduces the risk of contamination on the surgical site, thereby improving surgical efficiency and safety.
Smart Images
Figure CN222467042U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a medical water knife. Background Art
[0002] In the medical field, especially in minimally invasive surgery and precision treatment technology, medical water jets have been widely used as an advanced and precise tool. The principle is to form a water jet at a very high speed through high-pressure water flow to achieve operations such as cutting, resection or cleaning of tissues or lesions. When the water jet is ejected at a certain angle rather than vertically, part of the kinetic energy of the high-speed water jet will be converted into lateral force after contacting the biological tissue, causing the water flow to splash and diffuse around the cutting point, making it difficult to effectively recover the water flow, and the accumulation of water flow may affect the surgical field of view and increase the difficulty of surgery. Utility Model Content
[0003] The technical problem to be solved by the utility model is that the existing oblique-angle water jet has the problem of water overflow and difficulty in recovery, and the accumulation of water may affect the surgical field of view and increase the difficulty of surgery.
[0004] In order to solve the above technical problems, the utility model provides a medical water knife, including a shell, a reflux pipe, a limit block and a back-suction assembly, the shell having a first end and a second end arranged opposite to each other, the shell having a liquid suction port formed at the second end, the reflux pipe being arranged in the shell and being connected to the liquid suction port, the limit block being located at the first end and being installed on the reflux pipe, the limit block having a limit hole for the back-suction assembly to pass through, the limit hole extending along a preset direction, the back-suction assembly successively passing through the limit hole, the reflux pipe and the liquid suction port and then extending into the effective area, and being able to move along the extension direction of the limit hole.
[0005] In some embodiments, the limiting hole extends along the first direction to allow the re-sucking assembly to move along the first direction.
[0006] In some embodiments, the limiting hole extends along the second direction to allow the re-sucking assembly to move along the second direction.
[0007] In some embodiments, the limit block includes a main body and a mounting portion connected to the main body, the main body is installed in the reflux pipe, the mounting portion is located outside the reflux pipe, and the limit hole is set along a second direction that passes through the main body and the mounting portion, and the second direction is set perpendicular to the first direction.
[0008] In some embodiments, the main body is interference fit with the return pipe, and the length of the mounting portion along the first direction is greater than the length of the first end along the first direction.
[0009] In some embodiments, the back-suction assembly includes a back-suction pipe and a negative pressure joint, the back-suction pipe is connected to the negative pressure joint, and the back-suction pipe is movably installed in the shell.
[0010] In some embodiments, the return suction tube includes a tube body and a return suction head, and the return suction head is inclined at a first preset angle to the axial direction of the tube body.
[0011] In some embodiments, a nozzle and a pressure tube are further included. The shell also includes a second end close to the action area. The nozzle is arranged at the second end. The pressure tube is arranged in the shell and connected with the nozzle. The nozzle and the pressure tube are axially inclined at a second preset angle.
[0012] In some embodiments, a pressure pump assembly is further included, wherein the pressure pump assembly is connected to the pressure pipe.
[0013] In some embodiments, the second preset angle is a, the amount of action of the water jet ejected from the nozzle on the tissue surface is S, the radius of the separation range of the water jet on the tissue surface is R, and the horizontal component of the amount is S x , the vertical component of the action is S y , satisfying the following relationship:
[0014] S=sin(2a)*R 2 ;
[0015] S x =(cosa) 2 *S;
[0016] S y =(sina) 2 *S.
[0017] Compared with the prior art, the medical water jet of the utility model has the following beneficial effects:
[0018] When the embodiment of the utility model performs precise water jet cutting, the moving track and position of the suction component are controllable. It can pass through the limiting hole of the limiting block and move along the extension direction of the limiting hole to flexibly adjust the position, so that one end of the suction component can accurately extend into the action area, so as to timely and effectively absorb and recover the overflow water flow during the operation, and quickly discharge it out of the shell. This embodiment not only significantly reduces the possibility of the surgical field of view being blurred by residues, and always keeps the surgical field clearly visible, but also fundamentally reduces the risk of contamination of the surgical site, thereby improving surgical efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1It is a schematic diagram of the structure of the limit block and the back-sucking assembly provided in the embodiment of the utility model;
[0020] Figure 2 This is a schematic diagram of the first state structure of the medical water jet provided by the embodiment of the utility model;
[0021] Figure 3 This is a schematic diagram of the second state structure of the medical water jet provided by the embodiment of the utility model;
[0022] Figure 4 It is a side view of the limit block provided in the embodiment of the utility model;
[0023] Figure 5 The utility model embodiment provides Figure 1 A partial enlarged view of the circled portion A;
[0024] Figure 6 The utility model embodiment provides Figure 3 A partial enlarged view of the circled portion B;
[0025] In the figure, 1. shell; 11. first end; 12. second end; 13. liquid suction port; 2. reflux pipe; 3. limit block; 31. limit hole; 32. main body; 33. mounting part; 4. back-suction assembly; 41. back-suction pipe; 411. pipe body; 412. back-suction head; 42. negative pressure joint; 5. nozzle; 6. pressure pipe; 7. pressure pump assembly. DETAILED DESCRIPTION
[0026] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0027] like Figures 1 to 6 As shown, the utility model provides a medical water knife, including a shell 1, a reflux pipe 2, a limit block 3 and a back-suction assembly 4. The shell 1 has a first end 11 and a second end 12 that are arranged opposite to each other. The shell 1 is formed with a liquid suction port 13 at the second end 12. The reflux pipe 2 is arranged in the shell 1 and is connected with the liquid suction port 13. Specifically, the limit block 3 is located at the first end 11 and is installed on the reflux pipe 2. The limit block 3 has a limit hole 31 for the back-suction assembly 4 to pass through. The limit hole 31 extends along a preset direction. The back-suction assembly 4 passes through the limit hole 31, the reflux pipe 2 and the liquid suction port 13 in sequence and then extends into the action area, and can move along the extension direction of the limit hole 31.
[0028] Based on the above structure, when performing precise water jet cutting operations, the moving track and position of the suction component 4 are controllable, and it can pass through the limiting hole 31 of the limiting block 3, and move along the extension direction of the limiting hole 31 to flexibly adjust the position, so that one end of the suction component 4 can accurately extend into the action area, so as to timely and effectively absorb and recover the overflow water flow during the operation, and quickly discharge it out of the shell 1. This embodiment not only significantly reduces the possibility of the surgical field of view being blurred by the residue, and always keeps the surgical field clearly visible, but also fundamentally reduces the risk of contamination of the surgical site, thereby improving the efficiency and safety of the operation.
[0029] like Figure 4 As shown, in some embodiments, the limiting hole 31 extends along the first direction to allow the re-sucking assembly 4 to move along the first direction.
[0030] The limiting hole 31 of this embodiment is a narrow and long hole style to adapt to the shape and movement requirements of the suction component 4. On the one hand, it ensures that the suction component 4 can be flexibly moved between different positions of the reflux pipe 2 as needed, such as adjusting with the change of the surgical cutting position to continuously and effectively absorb waste. In addition, limiting the movement path of the suction component 4 so that it moves along the preset first direction helps to accurately control and guide and avoid movement of invalid or non-target areas.
[0031] It should be noted that the first direction in this embodiment is perpendicular to the axial direction of the return pipe 2 (eg Figure 1 Y direction shown).
[0032] In some embodiments, the limiting hole 31 extends along the second direction to allow the re-sucking assembly 4 to move along the second direction.
[0033] Specifically, the diameter of the back-suction component 4 is not greater than the width of the limiting hole 31, ensuring that the back-suction component 4 can slide smoothly in the limiting hole 31 inside the limiting block 3 without hindrance, so that the back-suction component 4 is movably connected to the limiting block 3, and the back-suction component 4 can move along the second direction. The first direction is perpendicular to the second direction, so that the back-suction component 4 in this embodiment can move freely along these two independent directions to achieve positioning adjustment in three-dimensional space. Preferably, the diameter of the back-suction component 4 is equal to the width of the limiting hole 31.
[0034] In specific applications, the above structure enables the suction component 4 to accurately adjust its position up and down (vertical direction) and front and back (horizontal direction) according to the needs of the surgical operation. Through this multi-dimensional movement ability, the suction component 4 can more accurately align and approach the action area, effectively sucking in wastewater, tissue debris and other substances generated during the operation in time and discharging them through the suction component 4, thereby keeping the surgical field clear, reducing the risk of contamination, and improving the safety and efficiency of the operation.
[0035] It should be noted that the second direction in this embodiment is along the axial direction of the return pipe 2 (eg Figure 1 X direction as shown).
[0036] like Figure 1 As shown, in some embodiments, the stopper 3 includes a main body 32 and a mounting portion 33 connected to the main body 32, the main body 32 is installed in the return pipe 2, and forms an embedded relationship with the return pipe 2 to fix the mounting portion 33, and the mounting portion 33 is located outside the return pipe 2, which is convenient for installing and removing the stopper 3. In addition, the stopper hole 31 is arranged along the second direction through the main body 32 and the mounting portion 33, and the second direction is arranged perpendicular to the first direction, so that the back-suction assembly 4 can move in the second direction perpendicular to the first direction.
[0037] In some embodiments, the main body 32 and the return pipe 2 are interference fit to form a stable and fixed connection without relative rotation, ensuring good sealing and the ability to withstand axial loads between the main body 32 and the return pipe 2, and preventing liquid leakage or loosening due to uneven force; in addition, the length of the mounting portion 33 along the first direction is greater than the length of the first end 11 along the first direction, so that the mounting portion 33 has a certain redundant length, which provides additional operating space during disassembly or replacement. The operator can more easily access and operate the mounting portion 33 to facilitate positioning, clamping and rotation during disassembly and assembly, thereby simplifying the workflow of maintenance and replacement of components and improving work efficiency and safety.
[0038] like Figure 1 As shown, in some embodiments, the back-suction component 4 includes a back-suction tube 41 and a negative pressure connector 42. The back-suction tube 41 is used to absorb leaked liquid, and the negative pressure connector 42 is connected to an external negative pressure source (such as a vacuum pump). The back-suction tube 41 is connected to the negative pressure connector 42 to transfer the negative pressure generated externally to the back-suction tube 41 through the negative pressure connector 42, thereby achieving effective absorption of the target substance. The back-suction tube 41 is movably installed in the shell 1 to allow the back-suction tube 41 to freely change its position in the shell 1 within a certain range according to actual operating requirements to adapt to different working conditions or operating angles, thereby ensuring that it can always accurately reach the position where overflowed water or tissue debris needs to be absorbed, keep the surgical field clear and reduce the risk of contamination.
[0039] like Figure 5As shown, in some embodiments, the re-suction tube 41 includes a tube body 411 and a re-suction head 412, and the re-suction head 412 is inclined at a first preset angle to the axial direction of the tube body 411. Since the cutting area may present various complex three-dimensional shapes, the inclined re-suction head 412 can better fit the cutting surface, thereby ensuring that waste water, tissue debris, etc. overflowing from different angles can be effectively captured and sucked away. In addition, by designing the inclination angle, the accumulation of bubbles or particles formed by liquid impact at the right angle of the re-suction head 412 can be avoided, reducing the possibility of pipeline blockage.
[0040] It should be noted that bone graft fusion is a surgery that removes the intervertebral cartilage layer and implants bone tissue to promote the permanent combination of two or more vertebrae. The residual cartilage tissue will hinder the effective fusion between vertebrae, increase the risk of failure and the possibility of postoperative recurrence. Traditional surgical instruments. Conventional debridement water jets use high-speed water jets and the Venturi effect to theoretically remove flexible tissues, but when faced with hard cartilage tissue, its negative pressure suction may not be enough to suck the cartilage into the working window to form an effective cutting effect, making it difficult to completely remove when dealing with complex bone concave surfaces, especially deep cartilage.
[0041] In this embodiment, the medical water jet also includes a nozzle 5 and a pressure tube 6. The shell 1 also includes a second end 12 close to the action area. The nozzle 5 is arranged at the second end 12. The pressure tube 6 is arranged in the shell 1 and is connected with the nozzle 5, so that the high-pressure fluid can be transmitted to the nozzle 5 through the pressure tube 6, so as to be sprayed out from the nozzle 5. The axial direction of the nozzle 5 and the pressure tube 6 is inclined at a second preset angle, so that the nozzle 5 is inclined at a certain angle to form an oblique water jet spray.
[0042] It can be understood that this embodiment changes the axial angle relationship between the nozzle 5 and the pressure tube 6 so that the water jet ejected from the nozzle 5 forms a certain oblique angle with the tissue surface to act on the tissue. In this way, the effect of the oblique water jet on the tissue can be decomposed into forces in two directions: horizontal force and vertical force. Compared with conventional debridement water jets, the oblique-angle water jet has a vertical force, thereby better achieving tissue removal and separation, especially in the removal of cartilage tissue on the bone surface.
[0043] In some embodiments, a pressure pump assembly 7 is further included, which is connected to the pressure pipe 6 to form a closed fluid circulation loop; the pressure pump assembly 7 is responsible for applying pressure to the liquid, changing it from a low pressure state to a high pressure state and driving it to flow through the pressure pipe 6. The pressure pump generally includes a pump body, a motor, a piston, an impeller or other mechanical structures that generate pressure.
[0044] like Figure 6As shown, in some embodiments, the second preset angle is a, the amount of action of the water jet ejected by the nozzle 5 on the tissue surface is S, the radius of the separation range of the water jet on the tissue surface is R, and the horizontal component of the amount is S x , the vertical component of the action is S y , satisfying the following relationship:
[0045] S=sin(2a)*R 2 ;
[0046] It can be understood that the above formula is used to calculate the action amount generated by the impact force of the water jet at the second preset angle, which is a measure of the pressure action area formed by the water jet acting on the tissue, where sin(2a) reflects the effect of the angle change on the action amount, and R 2 It represents the effect that the range of action of the water jet increases as the square of the radius increases.
[0047] It should be noted that the water jet action on the tissue surface can be decomposed into the vertical and horizontal action components and the return waterline after the water jet is reflected, among which:
[0048] S x =(cosa) 2 *S;
[0049] As can be understood, this formula gives the distribution of the action in the horizontal direction, which is proportional to the cosine square of the angle of incidence. When the water jet is close to vertical (a is close to 0° or 180°), S x The component will be smaller; when the water jet is more inclined, this component will increase.
[0050] S y =(sina) 2 *S;
[0051] Similarly, this formula gives the distribution of the action in the vertical direction, which is proportional to the sine square of the incident angle. When the water jet is more vertical, S y The component is larger; as the angle increases, the water jet tends to be more horizontal, and this component decreases accordingly.
[0052] By using the above formula, the nozzle 5 and the axial direction of the pressure tube 6 can be tilted at a reasonable angle so as to better act on the tissue surface.
[0053] In summary, the embodiment of the utility model provides a medical water jet, and when performing precise water jet cutting operations, the movement trajectory and position of the suction component 4 are controllable, and it can be flexibly adjusted in the limit hole 31 provided by the limit block 3 according to the preset path, so that one end of the suction component 4 can accurately extend into the action area, so as to timely and effectively absorb and recover the overflow water flow during the operation, and quickly discharge it out of the shell 1. This embodiment not only significantly reduces the possibility of the surgical field of view being blurred by the residue, and always keeps the surgical field clearly visible, but also fundamentally reduces the risk of contamination of the surgical site, thereby improving the efficiency and safety of the operation.
[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.
Claims
1. A medical water jet, characterized in that: It includes a shell, a reflux pipe, a limit block and a back-suction assembly, the shell having a first end and a second end arranged opposite to each other, the shell having a liquid suction port formed at the second end, the reflux pipe being arranged in the shell and connected with the liquid suction port, the limit block being located at the first end and installed on the reflux pipe, the limit block having a limit hole for the back-suction assembly to pass through, the limit hole extending along a preset direction, the back-suction assembly successively passing through the limit hole, the reflux pipe and the liquid suction port and then extending into the effective area, and being able to move along the extension direction of the limit hole.
2. The medical water jet according to claim 1, characterized in that: The limiting hole extends along a first direction so that the suction assembly can move along the first direction.
3. The medical water jet according to claim 1 or 2, characterized in that: The limiting hole extends along the second direction so that the suction assembly can move along the second direction.
4. The medical water jet according to claim 1, characterized in that: The limiting block includes a main body and a mounting portion connected to the main body, the main body is installed in the reflux pipe, the mounting portion is located outside the reflux pipe, and the limiting hole is arranged along the second direction through the main body and the mounting portion.
5. The medical water jet according to claim 4, characterized in that: The main body is interference-fitted with the return pipe, and the length of the mounting portion along the first direction is greater than the length of the first end along the first direction.
6. The medical water jet according to claim 1, characterized in that: The back-suction assembly comprises a back-suction pipe and a negative pressure joint, the back-suction pipe is connected to the negative pressure joint, and the back-suction pipe is movably installed in the shell.
7. The medical water jet according to claim 6, characterized in that: The return suction pipe comprises a pipe body and a return suction head, wherein the return suction head is inclined at a first preset angle to the axial direction of the pipe body.
8. The medical water jet according to claim 1, characterized in that: It also includes a nozzle and a pressure tube. The shell also includes a second end close to the action area. The nozzle is arranged at the second end. The pressure tube is arranged in the shell and connected with the nozzle. The nozzle and the pressure tube are axially inclined at a second preset angle.
9. The medical water jet according to claim 8, characterized in that: Also included is a pressure pump assembly, which is in communication with the pressure pipe.
10. The medical water jet according to claim 8, characterized in that: The second preset angle is a, the amount of action of the water jet ejected from the nozzle on the tissue surface is S, the radius of the separation range of the water jet on the tissue surface is R, and the horizontal component of the amount is S x , the vertical component of the action is S y , satisfying the following relationship: <h2 style=";text-align:left;direction:ltr">S = sin(2a)*R<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> ; S x =(thing) 2 *S; S y =(sina) 2 *S。