A skull craniotomy operation negative pressure suction device

Abstract

The utility model relates to a skull craniotomy operation negative pressure suction device, including the flexible cover made of transparent material, the flexible cover one end big, one end small arrangement and small scale end cover set in one end of milling cutter, the cutter head of milling cutter is located in the chamber of flexible cover, flushes the head and is along the cover mouth circumference direction interval arrangement many groups of flexible cover, flushes the head with the liquid guide export of flush equipment and passes through the pipeline intercommunication, one end of suction pipe stretches into the chamber of flexible cover, the other end of suction pipe and the suction mouth of negative pressure suction device are connected through the pipeline, adopts transparent flexible cover to form the physical barrier, will the milling cutter head completely wrap up in the chamber, breaks out the bone splinter to the surrounding environment, and the flush head of circumference even distribution sprays physiological saline to the center, forms the spiral water flow in the chamber, can ensure the light transmittance of flexible cover, can clearly milling cutter head and the contact state of bone window, cooperation suction operation of suction pipe, can suck out the bone splinter that splashes out of flexible cover, and further can effectively prevent the bone splinter splashing problem.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a negative pressure suction device for craniotomy. Background Technology

[0002] In neurosurgical craniotomy, the milling cutter, as the mainstream tool for opening the skull, generates kinetic energy from its high-speed rotation, causing bone fragments to scatter in all directions with an initial velocity of 30-70 m / s. According to a clinical study published in *Neurosurgery* in 2025, in traditional milling cutter craniotomy, bone fragments with a diameter of 10-500 μm can spread over a radius of 1.5 meters within the surgical area. Of these, 60% adhere to the surgical instrument surface, and 35% suspend in the air, forming bioaerosols. This phenomenon presents multiple clinical challenges: splattered bone fragments obstruct the microscope's view, requiring frequent interruptions for cleaning. Clinical statistics show that debris removal significantly prolongs the operation time for each craniotomy; microorganisms carried by bone fragments spread through the air, increasing the risk of surgical site infection; and suspended bone fragment particles can be inhaled by the surgeon, causing respiratory inflammation. Existing negative pressure suction devices require one-handed operation, occupying one hand and restricting the surgeon's ability to use both hands. Meanwhile, the open tubing design of traditional suction devices is prone to blockage by bone debris, requiring manual clearing every 15 minutes on average, severely impacting the continuity of the surgery. This invention addresses these pain points by proposing a dynamic negative pressure suction system integrated with a milling cutter. Through multi-dimensional technological innovation, it achieves source control and efficient collection of bone debris, providing a safer and more efficient operating environment for craniotomy. Utility Model Content

[0003] The purpose of this invention is to provide a negative pressure suction device for craniotomy, which aims to solve the problem of bone fragments flying in the above-mentioned technical issues and ensure the continuity of the surgery.

[0004] The technical solution adopted in this utility model is as follows:

[0005] Negative pressure suction device for craniotomy includes:

[0006] A flexible cover made of transparent material, the flexible cover being larger at one end and smaller at the other, with the smaller end fitted onto the end of a milling cutter near the cutter head, the cutter head being located inside the cavity of the flexible cover;

[0007] Multiple sets of flushing heads are arranged at intervals along the circumferential direction of the opening of the flexible cover, and the flushing heads are connected to the liquid outlet of the flushing equipment through a pipeline;

[0008] The suction tube extends into the cavity of the flexible cover at one end, and the other end of the suction tube is connected to the suction port of the negative pressure suction device through a pipeline.

[0009] This utility model also has the following technical features:

[0010] In one embodiment of this utility model, the nozzles of the multiple sets of flushing heads are obliquely pointed towards the inner wall of the flexible cover.

[0011] In one embodiment of this utility model, multiple sets of suction tubes are arranged at intervals along the circumferential direction of the flexible cover.

[0012] In one embodiment of this utility model, the suction tube is arranged close to the small-sized inner wall of the flexible cover.

[0013] In one embodiment of this utility model, one end of each of the multiple sets of suction tubes is connected to a main suction pipe, and the main suction pipe is connected to the suction port of the negative pressure device through a pipeline. The suction tube is annular and its inner diameter is larger than the outer diameter of the opening of the flexible cover.

[0014] In one embodiment of this utility model, multiple sets of flushing heads are respectively connected to a flushing main pipe through pipelines. The inner diameter of the flushing main pipe is smaller than the outer diameter of the opening of the flexible cover. The flushing main pipe is located outside the flexible cover and is connected to the liquid outlet of the flushing equipment through pipelines.

[0015] In one embodiment of the present invention, the edge of the opening of the flexible cover is continuously provided with a flange, the flange extends toward the center of the flexible cover, and a loop is formed between the flange and the flexible cover.

[0016] In one embodiment of the present invention, the small end of the flexible cover is inserted into the milling cutter, the outer wall of the small end of the flexible cover has a corrugated tube structure, and a rubber ring is provided on the inner wall of the small end of the flexible cover.

[0017] In one embodiment of this utility model, the milling cutter is provided with at least two sets of fixing clamps, and the overhanging end of the fixing clamp is used to fix the pipeline.

[0018] Compared with existing technologies, the beneficial effects of this utility model are as follows: a transparent flexible cover forms a physical barrier, completely enclosing the milling cutter head within the cavity, preventing bone fragments from splashing into the surrounding environment. The circumferentially distributed irrigation heads spray saline solution towards the center at a certain angle, forming a spiral water flow within the cavity. This ensures the light transmittance of the flexible cover, allowing a clear view of the contact state between the milling cutter head and the bone window. Combined with the suction operation of the suction tube, the splashed bone fragments can be suctioned out of the flexible cover, thereby effectively preventing the problem of bone fragment splashing and ensuring the cleanliness of the entire operating room. Attached Figure Description

[0019] Figure 1 and Figure 2These are schematic diagrams showing two different perspective states of the negative pressure suction device for craniotomy surgery in one embodiment of this utility model;

[0020] Figure 3 This is a front view of the negative pressure suction device for craniotomy surgery according to one embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional schematic diagram of the negative pressure suction device for craniotomy surgery according to one embodiment of the present invention;

[0022] Figure 5 This is a plan view of the negative pressure suction device for craniotomy surgery and the milling cutter in one embodiment of the present invention;

[0023] Figure 6 This is a cross-sectional plan view of the negative pressure suction device for craniotomy surgery according to one embodiment of the present invention. Detailed Implementation

[0024] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0025] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0026] It should be noted that the removal of bone debris significantly prolongs the operation time in each craniotomy; the microorganisms carried by bone debris can spread in the air, increasing the risk of surgical site infection; and suspended bone debris particles can be inhaled by the surgeon, causing respiratory inflammation. Current negative pressure suction devices require one-handed operation, occupying one of the surgeon's hands and restricting the surgeon's ability to use both hands. Meanwhile, the open tubing design of traditional suction devices is prone to blockage by bone debris, requiring manual clearing every 15 minutes on average, which seriously affects the continuity of the surgery. To address this, this utility model proposes a negative pressure suction device for craniotomy, comprising: a flexible cover 10 made of transparent material, the flexible cover 10 being larger at one end and smaller at the other, with the smaller end fitted onto the end of a milling cutter A near the cutter head, the cutter head of the milling cutter A being located within the cavity of the flexible cover 10; multiple sets of rinsing heads 20 arranged at intervals along the circumferential direction of the opening of the flexible cover 10, the rinsing heads 20 being connected to the liquid outlet of a rinsing device through a pipe; and a suction tube 30, one end of which extends into the cavity of the flexible cover 10, the other end of which is connected to the suction port of the negative pressure suction device through a pipe.

[0027] In one embodiment, see Figure 5 The milling cutter A has a step. The flexible cover 10 should be made of medical-grade silicone, which is flexible enough. When the flexible cover 10 is installed on the milling cutter A, it can effectively insert the small tube of the flexible cover 10 into the step shaft of the milling cutter A, thereby achieving reliable fixation between the flexible cover 10 and the milling cutter A. When the milling cutter A performs craniotomy, the flexible cover 10 can undergo compression deformation to adapt to the movement of the milling cutter A, without affecting the normal scraping of the bone window by medical staff.

[0028] In one embodiment, the rinsing head 20 is a water spray head, and the flow rate of the rinsing head 20 should not be too large. The rinsing device is filled with physiological saline. When the rinsing device is started, the physiological saline flushed out by the rinsing head 20 is directed towards the inner wall of the flexible cover 10, thereby ensuring the cleanliness of the inner wall of the flexible cover 10 and ensuring that medical personnel can always see the internal condition of the flexible cover 10.

[0029] In one embodiment, the negative pressure suction device can be activated first to suction bone debris inside the flexible cover 10. When the flexible cover 10 becomes blurry, the flushing device can be activated to clean the inner wall of the flexible cover 10 to ensure the light transmittance of the inner wall of the flexible cover 10.

[0030] In one embodiment, the nozzles of the plurality of flushing heads 20 are angled toward the inner wall of the flexible cover 10.

[0031] In a preferred embodiment, see Figure 4 and Figure 6The nozzle of the rinsing head 20 forms a 45° angle with the opening of the flexible cover 10, thereby enabling the rinsing head 20 to effectively rinse the inner wall of the flexible cover 10 and ensure the cleanliness of the inner wall of the flexible cover 10.

[0032] In one embodiment, to ensure effective suction of splashed bone fragments, multiple sets of suction tubes 30 are arranged at intervals along the circumferential direction of the flexible cover 10.

[0033] In one embodiment, the suction tube 30 is arranged close to the small-sized inner wall of the flexible cover 10.

[0034] In one embodiment, the suction tube 30 is positioned close to the small size of the flexible cover 10, so that the inner circle enclosed by the suction tube 30 is small and the rinsing circle enclosed by the rinsing head 20 is large. Therefore, it can ensure the cleaning effect on the entire inner wall of the flexible cover 10 and also wash away debris.

[0035] In one embodiment, see Figure 1 and Figure 2 One end of each of the multiple sets of suction tubes 30 is connected to a main suction pipe 31. The main suction pipe 31 is connected to the suction port of the negative pressure device through a pipeline. In order to avoid the main suction pipe 31 from blocking the flexible cover 10, the suction tube 30 is annular and its inner diameter is larger than the outer diameter of the cover opening of the flexible cover 10.

[0036] In one embodiment, multiple sets of the flushing heads 20 are respectively connected to the flushing manifold 21 through pipelines. The inner diameter of the flushing manifold 21 is slightly smaller than the outer diameter of the opening of the flexible cover 10. The flushing manifold 21 is located outside the flexible cover 10. The flushing manifold 21 is connected to the liquid outlet of the flushing equipment through pipelines.

[0037] In one embodiment, see Figure 4 and Figure 6 To receive the saline solution that has been rinsed off, the flexible cover 10 has a continuous flange 11 at the edge of the cover opening. The flange 11 extends toward the center of the flexible cover 10 and forms a loop between the flange 11 and the flexible cover 10.

[0038] When the rinsing device sprays saline from the rinsing head 20, it can clean the inner wall of the flexible cover 10. The water that is rinsed down falls along the inner wall of the flexible cover 10 into the pocket formed between the flange 11 and the flexible cover 10. After the operation is completed, the mixed water that has been rinsed down into the pocket is cleaned.

[0039] In one embodiment, see Figure 6To ensure a seal between the small end of the flexible cover 10 and the stepped shaft of the milling cutter A, the small end of the flexible cover 10 is inserted into the milling cutter A. The outer wall of the small end of the flexible cover 10 has a corrugated tube structure, and a rubber ring 12 is provided on the inner wall of the small end of the flexible cover 10.

[0040] In one embodiment, the outer wall of the small end of the flexible cover 10 has a corrugated tube structure, which allows the flexible cover 10 to stretch and deform along the axial direction, thereby ensuring that the cutting head of the milling cutter A can reliably contact the skull.

[0041] In one embodiment, in order to effectively fix the pipeline on the milling cutter A and prevent the pipeline from hindering the normal use of the milling cutter A, at least two sets of fixing clips 40 are provided on the milling cutter A, and the overhanging end of the fixing clip 40 is used to fix the pipeline.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A negative pressure suction device for craniotomy, characterized in that, include: A flexible cover (10) made of transparent material is arranged with one end larger and the other end smaller, and the smaller end is sleeved on the end of the milling cutter (A) near the cutter head, and the cutter head of the milling cutter (A) is located inside the cavity of the flexible cover (10). Multiple sets of flushing heads (20) are arranged at intervals along the circumferential direction of the opening of the flexible cover (10), and the flushing heads (20) are connected to the liquid outlet of the flushing equipment through a pipeline; The suction tube (30) has one end inserted into the cavity of the flexible cover (10), and the other end of the suction tube (30) is connected to the suction port of the negative pressure suction device through a pipeline.

2. The negative pressure suction device for craniotomy surgery according to claim 1, characterized in that, The nozzles of the multiple sets of flushing heads (20) are obliquely pointed to the inner wall of the flexible cover (10).

3. The negative pressure suction device for craniotomy surgery according to claim 1, characterized in that, Multiple sets of suction tubes (30) are arranged at intervals along the circumferential direction of the flexible cover (10).

4. The negative pressure suction device for craniotomy surgery according to claim 1, characterized in that, The suction tube (30) is arranged close to the small inner wall of the flexible cover (10).

5. The negative pressure suction device for craniotomy surgery according to claim 3, characterized in that, One end of each of the multiple sets of suction tubes (30) is connected to the main suction pipe (31), and the main suction pipe (31) is connected to the suction port of the negative pressure device through a pipeline. The suction tube (30) is annular and its inner diameter is larger than the outer diameter of the opening of the flexible cover (10).

6. The negative pressure suction device for craniotomy surgery according to claim 1, characterized in that, Multiple sets of the flushing heads (20) are connected to the flushing main pipe (21) through pipelines. The inner diameter of the flushing main pipe (21) is smaller than the outer diameter of the cover opening of the flexible cover (10). The flushing main pipe (21) is located outside the flexible cover (10). The flushing main pipe (21) is connected to the liquid outlet of the flushing equipment through pipelines.

7. The negative pressure suction device for craniotomy surgery according to claim 1, characterized in that, The flexible cover (10) has a continuous flange (11) at the edge of the cover opening. The flange (11) extends toward the center of the flexible cover (10) and forms a loop between the flange (11) and the flexible cover (10).

8. The negative pressure suction device for craniotomy surgery according to claim 1, characterized in that, The small end of the flexible cover (10) is inserted into the milling cutter (A). The outer wall of the small end of the flexible cover (10) has a corrugated tube structure, and a rubber ring (12) is provided on the inner wall of the small end of the flexible cover (10).

9. The negative pressure suction device for craniotomy surgery according to claim 1, characterized in that, The milling cutter (A) is provided with at least two sets of fixing clips (40), and the overhanging end of the fixing clip (40) is used to fix the pipeline.

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