A bone surface fluid suction device

Abstract

The utility model relates to a kind of bone surface liquid suction device, including installation cylinder, be located in the inside of installation cylinder and the liquid suction part of bone surface close, be located on the connecting portion of installation cylinder, connecting portion is equipped with the aspirator that through suction to the liquid suction part is applied negative pressure, aspirator can be inhaled the liquid on bone surface into liquid suction part, the utility model can effectively attract and remove the liquid remaining on contact surface, prevent liquid remaining on bone contact surface, further produce adverse effect to the bonding operation of bone surface, it is favorable to enhance the bonding of bone cement and bone contact surface, avoid the early prosthesis loosening caused by the inadhesive of bone contact surface.

Description

Technical Field

[0001] This utility model relates to the field of surgical instrument technology, and in particular to a bone surface fluid suction device. Background Technology

[0002] Bone cement is a medical material used in orthopedic surgery. It is also known as bone cement or bone adhesive. Bone cement has the following characteristics and uses: fixing artificial joints, repairing fractures, treating vertebral compression fractures, and filling bone defects. When bonding bone surfaces with bone cement, it is necessary to absorb all the liquid at the bone contact surface.

[0003] In existing orthopedic surgical techniques, traditional methods are mainly used to remove residual fluid from the bone surface, such as wiping with medical gauze, absorbing with porous sponge materials, or pressing with sterile cotton balls. These methods remove surface fluid by utilizing the absorption properties of the materials themselves. Another method is to use a suction device to aspirate the fluid from the bone surface.

[0004] The main drawback of existing technologies lies in the limitation of liquid adsorption effects caused by the unique microstructure of the bone surface. Specifically, human bone tissue is a typical porous structure with a complex honeycomb-like pore network. Currently used clinical adsorption materials, such as medical absorbent cotton, sterile gauze, and polymer sponges, are limited by the insufficient matching between their fiber diameter and the size of the bone pores. When these traditional adsorption media come into contact with the bone surface, they can only remove free fluid from the surface layer of the bone through capillary action. However, many residual fluids, including blood, tissue fluid, and bone marrow components, cannot be effectively removed from deeper layers below the bone surface. These residual fluids can affect the curing process of bone cement, significantly reducing its shear strength and even causing microleakage, thus shortening the lifespan of the bone cement by more than half. This defect directly affects the stability in the early postoperative period and its long-term resistance to loosening. In severe cases, it may even induce various complications and increase the probability of revision surgery. Utility Model Content

[0005] This invention aims to solve the problems existing in the prior art by providing a bone surface fluid suction device. A sponge is used as the fluid absorption medium, with one end of the sponge tightly attached to the bone surface and the other end connected to a suction device. The suction device draws out the fluid from the bone surface through the sponge, while also ensuring that the sponge maintains a high-efficiency fluid absorption capacity.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: This bone surface fluid suction device includes an installation cylinder, a fluid suction part disposed inside the installation cylinder and able to closely adhere to the bone surface, and a connecting part disposed on the installation cylinder. A suction device is installed on the connecting part to apply negative pressure to the fluid suction part by suction.

[0007] To further improve the design, the liquid-absorbing part is a sponge.

[0008] Further improvements include an axially extending straight cylinder and a funnel-shaped expansion cylinder that is sealed and fixed to the bottom of the straight cylinder.

[0009] Further improvements include the following: one end of the liquid absorption section extends from the bottom of the mounting cylinder, and a soft, annularly arranged bone surface sealing ring is fixedly installed on the bottom of the inner wall of the mounting cylinder, with the inner side of the bone surface sealing ring tightly surrounding the outer side of the liquid absorption section.

[0010] In a further improvement, the mounting cylinder includes a pull-out cylinder and a liquid-absorbing cylinder disposed inside the pull-out cylinder. The liquid-absorbing part is disposed between the pull-out cylinder and the liquid-absorbing cylinder and is in a compressed state. The liquid-absorbing part is fixed to the outside of the liquid-absorbing cylinder. The inner wall of the liquid-absorbing cylinder is provided with several through holes leading to the liquid-absorbing part. The connecting part is disposed at one end of the liquid-absorbing cylinder.

[0011] To further improve the design, the top outer side of the pull-out tube is provided with anti-slip textures to facilitate pulling.

[0012] To further improve the design, the bottom of the pull-out tube is provided with a guide tip that facilitates insertion into the bone cavity.

[0013] Further improvements include an outer cylinder with a top plate and a bottom plate fixed to its inner wall. The bottom plate has a through channel. Fixed seats are fixedly installed at opposite ends of the top and bottom plates. A sealed and deformable membrane inner cylinder is installed between the fixed seats. The liquid-absorbing part is located inside the membrane inner cylinder. The membrane inner cylinder can compress the liquid-absorbing part inward under negative pressure. One end of the liquid-absorbing part extends out of the outer cylinder from the channel. Several ventilation slots leading to the membrane inner cylinder are opened on the outer side of the outer cylinder. The connecting part passes through the top plate and contacts the liquid-absorbing part.

[0014] Further improvements include the fixing base consisting of a large annular plate and a small annular plate, wherein the inner diameter of the large annular plate is larger than the outer diameter of the small annular plate, and the membrane inner cylinder is sealed and fixed between the large annular plate and the small annular plate.

[0015] The beneficial effects of this invention are: it can effectively absorb and remove residual liquid on the contact surface, preventing liquid residue from remaining on the bone contact surface and thus adversely affecting the bonding operation of the bone surface. It is beneficial to enhance the bonding between bone cement and bone contact surface and avoid early prosthesis loosening due to weak bonding of bone contact surface. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the first embodiment;

[0017] Figure 2 for Figure 1 Sectional view along the middle AA direction;

[0018] Figure 3This is a schematic diagram of the suction device in the first embodiment;

[0019] Figure 4 This is a schematic diagram of the structure of the second embodiment;

[0020] Figure 5 for Figure 4 Sectional view along the BB direction;

[0021] Figure 6 This is a schematic diagram of the suction device in the second embodiment;

[0022] Figure 7 This is a schematic diagram of the structure of the third embodiment;

[0023] Figure 8 for Figure 7 A cross-sectional view along the CC direction;

[0024] Figure 9 This is a schematic diagram of the liquid absorption section in the third embodiment;

[0025] Figure 10 for Figure 8 A magnified view of a section at point A in the middle;

[0026] Figure 11 This is a schematic diagram of the suction device in the third embodiment.

[0027] Explanation of reference numerals in the attached drawings: Mounting cylinder 1, Straight cylinder 1-1a, Expansion cylinder 1-2a, Bone surface sealing ring 1-3a, Pull-out cylinder 1-1b, Liquid suction cylinder 1-2b, Through hole 1-3b, Anti-slip texture 1-4b, Guide tip 1-5b, Outer cylinder 1-1c, Top plate 1-2c, Bottom plate 1-3c, Channel 1-4c, Fixing seat 1-5c, Large annular plate 1-5-1c, Small annular plate 1-5-2c, Membrane inner cylinder 1-6c, Liquid suction part 2, Connecting part 3, Suction device 4. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0029] See attached document Figures 1-3This is the first embodiment. This bone surface fluid suction device is mainly used for suctioning fluid from a columnar cross-section bone surface. It includes an installation cylinder 1 composed of a straight cylinder 1-1a and an expansion cylinder 1-2a. The straight cylinder 1-1a is axially continuous, and the expansion cylinder 1-2a is funnel-shaped with a large opening and a small opening at each end. One end of the straight cylinder 1-1a is sealed and fixed to the small opening of the expansion cylinder 1-2a. A suction part 2, which is a sponge, is provided inside the expansion cylinder 1-2a and fixed to the side wall of the expansion cylinder 1-2a. The suction part 2 extends from the large opening of the expansion cylinder 1-2a and is used to tightly adhere to the bone surface. The other end of the straight cylinder 1-1a is a connecting part 3, on which a suction device 4 is installed. The suction device 4 applies negative pressure to the suction part 2 through suction, allowing the bone surface fluid to be drawn into the suction part 2. Simultaneously, the suction device 4 can also continuously draw... The liquid in the suction section 2 is drawn in, ensuring that the suction section 2 always maintains its most efficient suction capacity. A bone surface sealing ring 1-3a is fixedly installed on the inner wall of the expansion cylinder 1-2a. The bone surface sealing ring 1-3a is annular and soft. The inner side of the bone surface sealing ring 1-3a is tightly fitted to the outer side of the suction section 2. The function of the bone surface sealing ring 1-3a is to seal the area around the suction section 2 when the suction section 2 is in close contact with the bone surface, thereby improving the suction effect. For example, if the diameter of the bone surface is about 3 cm, and the inner diameter of the bone surface sealing ring 1-3a is set to 2.5 cm, then when the suction section 2 is in close contact with the bone surface, the bone surface sealing ring 1-3a is also in close contact with the bone surface. At this time, the top view of the bone surface sealing ring 1-3a and the bone surface is similar to "◎". The bone surface sealing ring 1-3a forms a seal between the suction section 2 and the bone surface, thereby enhancing the suction capacity of the suction device 4 for the liquid on the bone surface.

[0030] See attached document Figures 4-6This is the second embodiment. This bone surface fluid suction device is mainly used for suctioning fluid from the inner wall of a bone cavity. It includes an installation cylinder 1 composed of a pull-out cylinder 1-1b and a suction cylinder 1-2b. The suction cylinder 1-2b is located inside the pull-out cylinder 1-1b. A suction section 2 is provided between the pull-out cylinder 1-1b and the suction cylinder 1-2b. The suction section 2 is a sponge and is in a compressed state. The suction section 2 is fixed to the outside of the suction cylinder 1-2b. Several through holes 1-3b are provided through the inner wall of the suction cylinder 1-2b, leading to the suction section 2. After the pull-out cylinder 1-1b and the suction cylinder 1-2b are inserted into the bone cavity, the pull-out cylinder 1-1b is pulled out. The compressed sponge expands and adheres tightly to the inner wall of the bone cavity. To facilitate this operation, the top of the outer side of the pull tube 1-1b is provided with anti-slip texture 1-4b for easy pulling, and the bottom of the pull tube 1-1b is provided with a guide tip 1-5b for easy insertion into the bone cavity. One end of the suction tube 1-2b is equipped with a connecting part 3, and a suction device 4 that can generate negative pressure through suction is installed on the connecting part 3. The suction device 4 applies negative pressure to the suction part 2 through suction, so that the liquid on the inner wall of the bone cavity can be sucked into the suction part 2. At the same time, the suction device 4 can also continuously suck away the liquid in the suction part 2, so that the suction part 2 always maintains the most efficient liquid suction capacity.

[0031] See attached document Figures 7-11This is the third embodiment. This bone surface fluid suction device is mainly used for suctioning fluid from columnar cross-section bone surfaces. It includes a mounting cylinder 1 composed of an outer cylinder 1-1c, a top plate 1-2c, and a bottom plate 1-3c. The top plate 1-2c and bottom plate 1-3c are fixed to the inner wall of the outer cylinder 1-1c. Fixing seats 1-5c are fixedly installed at opposite ends of the top plate 1-2c and bottom plate 1-3c. A sealed thin-film inner cylinder 1-6c is installed between the fixing seats 1-5c. The thin-film inner cylinder 1-6c is cylindrical. The fixing seats 1-5c consist of a large annular plate. It consists of a large annular plate 1-5-1c and a small annular plate 1-5-2c. The inner diameter of the large annular plate 1-5-1c is larger than the outer diameter of the small annular plate 1-5-2c. The inner membrane cylinder 1-6c is sealed and fixed between the large annular plate 1-5-1c and the small annular plate 1-5-2c. Several ventilation slots 1-7c leading to the inner membrane cylinder 1-6c are opened on the outside of the outer cylinder 1-1c. The liquid absorption part 2 is located inside the inner membrane cylinder 1-6c. The liquid absorption part 2 is a sponge. The inner membrane cylinder 1-6c can compress the liquid absorption part 2 inward under negative pressure. The bottom plate 1-3c is provided with... A through channel 1-4c is formed, with one end of the suction part 2 extending from the channel 1-4c into the outer cylinder 1-1c and fitting snugly against the bone surface. A connecting part 3 is fixedly installed on the top plate 1-2c, passing through the top plate 1-2c and contacting the suction part 2. The connecting part 3 is tubular, and a suction device 4 capable of generating negative pressure through suction is installed on the connecting part 3. The suction device 4 applies negative pressure to the suction part 2 through suction, allowing fluid from the bone surface to be drawn into the suction part 2. At the same time, the suction device 4 can also continuously remove fluid from the suction part 2, ensuring that the suction part 2 is always... To maintain the most efficient suction capacity, when the suction device 4 applies negative pressure to the suction part 2, since the suction part 2 is located inside the sealed inner membrane cylinder 1-6c, and the bottom of the inner membrane cylinder 1-6c is in close contact with the bone surface, the pressure in the inner membrane cylinder 1-6c will be less than the external pressure. The external atmospheric pressure will compress the inner membrane cylinder 1-6c inward, thereby compressing the suction part 2. When the suction part 2 is compressed, the suction effect is greatly enhanced. Its principle is similar to the negative pressure drainage device for wound treatment in the prior art.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A bone surface fluid suction device, comprising a mounting cylinder (1), a fluid suction part (2) disposed inside the mounting cylinder (1) and capable of closely adhering to the bone surface, and a connecting part (3) disposed on the mounting cylinder (1), characterized in that: A suction device (4) is installed on the connecting part (3) to apply negative pressure to the liquid suction part (2) by suction.

2. The bone surface fluid suction device according to claim 1, characterized in that: The liquid-absorbing part (2) is a sponge.

3. The bone surface fluid suction device according to claim 2, characterized in that: The mounting cylinder (1) includes an axially penetrating straight cylinder (1-1a) and an expansion cylinder (1-2a) that is sealed and fixed to the bottom of the straight cylinder (1-1a) and is flared.

4. The bone surface fluid suction device according to claim 2 or 3, characterized in that: One end of the liquid absorption part (2) extends out from the bottom of the mounting cylinder (1). A soft and annular bone surface sealing ring (1-3a) is fixedly installed on the bottom of the inner wall of the mounting cylinder (1). The inner side of the bone surface sealing ring (1-3a) is tightly attached to and surrounds the outer side of the liquid absorption part (2).

5. The bone surface fluid suction device according to claim 1 or 2, characterized in that: The mounting cylinder (1) includes a pull-out cylinder (1-1b) and a liquid suction cylinder (1-2b) disposed inside the pull-out cylinder (1-1b). The liquid suction part (2) is disposed between the pull-out cylinder (1-1b) and the liquid suction cylinder (1-2b) and is in a compressed state. The liquid suction part (2) is fixed to the outside of the liquid suction cylinder (1-2b). The inner wall of the liquid suction cylinder (1-2b) is provided with a plurality of through holes (1-3b) leading to the liquid suction part (2). The connecting part (3) is disposed at one end of the liquid suction cylinder (1-2b).

6. The bone surface fluid suction device according to claim 5, characterized in that: The top outer side of the pull-out tube (1-1b) is provided with anti-slip texture (1-4b) to facilitate pulling.

7. The bone surface fluid suction device according to claim 5, characterized in that: The bottom of the pull-out tube (1-1b) is provided with a guide tip (1-5b) to facilitate insertion into the bone cavity.

8. The bone surface fluid suction device according to claim 1 or 2, characterized in that: The mounting cylinder (1) includes an outer cylinder (1-1c), a top plate (1-2c) and a bottom plate (1-3c) are fixed to the inner wall of the outer cylinder (1-1c), a through channel (1-4c) is provided on the bottom plate (1-3c), a fixing seat (1-5c) is fixedly installed at the opposite ends of the top plate (1-2c) and the bottom plate (1-3c), and a sealing and deformable thin film inner cylinder (1-6c) is installed between the fixing seats (1-5c). The liquid absorption part (2) is located inside the inner cylinder of the membrane (1-6c). The inner cylinder of the membrane (1-6c) can compress the liquid absorption part (2) inward under negative pressure. One end of the liquid absorption part (2) extends out of the outer cylinder (1-1c) from the channel (1-4c). Several ventilation slots (1-7c) leading to the inner cylinder of the membrane (1-6c) are provided on the outside of the outer cylinder (1-1c). The connecting part (3) passes through the top plate (1-2c) and contacts the liquid absorption part (2).

9. The bone surface fluid suction device according to claim 8, characterized in that: The fixing seat (1-5c) is composed of a large annular plate (1-5-1c) and a small annular plate (1-5-2c). The inner diameter of the large annular plate (1-5-1c) is larger than the outer diameter of the small annular plate (1-5-2c). The membrane inner cylinder (1-6c) is sealed and fixed between the large annular plate (1-5-1c) and the small annular plate (1-5-2c).

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