KR100628364B1 - Syringe piston using in fat transplantation - Google Patents

Abstract

The present invention is to provide a piston for a fat implant syringe configured to automatically discharge the pre-oil component of the inhaled fat through the piston having a filtering means therein, while being easily discharged to the rear of the piston. A piston structure of a liposuction implanter which is located at and configured without a shaft, comprising: a piston-less piston body, a packing coupled to an outer surface of the piston body to maintain airtightness with a cylinder inner wall of the container, and a front and rear of the piston body; To secure the first and second check valves in the main body, which are provided at both inlets of the preoil discharge port and the inlet of the preoil discharge port to open and close the preoil discharge port by an external force. Opening means consisting of the first and second fixing cover having a through hole in the center, Group pre-five days is provided on the discharge path fat is filtered free oil is present a piston of the syringe for liposuction transplantation, including filtering means for passing.

Liposuction, Liposuction, Pre-Oil, Piston, Pre-Oil Separation

Description

Piston of a liposuction syringe {SYRINGE PISTON USING IN FAT TRANSPLANTATION}

1 is a separated configuration of the piston according to the first embodiment of the present invention.

2 is a cross-sectional view of the coupling state of the piston according to the first embodiment of the present invention.

3 to 5 are operational state diagrams of the piston according to the first embodiment of the present invention.

Figure 6 is a liposuction, liposuction and transplantation process according to the present invention.

Figure 7 is a comparison of the results obtained by centrifuging the fat inhaled using the piston and the general piston according to the present invention.

8 is a separated configuration diagram of a piston according to a second embodiment of the present invention.

9 is a cross-sectional view of the coupling state of the piston according to a second embodiment of the present invention.

10 to 12 is an operation state diagram of the piston according to a second embodiment of the present invention.

Fig. 13 is an exploded view of the piston according to the third embodiment of the present invention.

14 is a cross-sectional view of the coupling state of the piston according to a third embodiment of the present invention.

15 to 17 is an operation state diagram of the piston according to the third embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

a: piston b: container

10A, 10B, 10C: piston body 11: groove

12: filter groove 13,13A: cap

14: outer surface of the filtering 15: through hole

20: Packing 30,300: Pre-Oil Outlet

40,400: Opening and closing means 41.Screws

43: Packing 44: Locking Screw

50: filter 60: weight

401,402: Check valve 403,404: Fixed cover

The present invention relates to a piston for use in a liposuction implantable syringe, and more particularly, to be configured to allow the pre-oil component of sucked fat to be automatically discharged to the rear of the piston while easily separating through the piston having a filter therein. A piston for a fat transplant syringe.

Lipograft is a means to replace the volume of soft tissues in the human body, and in particular, it is widely used for cosmetic purposes such as facial wrinkle removal or depression treatment, but the biggest disadvantage was the decrease in volume due to absorption.

If the volume absorption is severe, 80-90% of the total graft volume does not survive and is necrotic and absorbed, so re-surgery is required, and the necrotic tissue acts as an infectious agent or its decomposed substances may be toxic in the process of being absorbed. Severe scar tissue is created or even normal surrounding tissue is destroyed.

Ingredients that must be removed from inhaled fat for autologous fat transplantation include free oil, which is free from red blood cells and broken fat cells. Red blood cells decompose when they leave the blood vessels in the body and are decomposed to thromboxane A2 (Thromboxane). It generates A2), which acts as an ionizing free radical, which acts as an element that destroys normal tissues, destroying fat cells, thereby greatly reducing the fat engraftment rate.

In the case of free oil, when it leaves the fat cells that act like storage containers, it breaks down and becomes ionized and becomes free fatty acid, which is a kind of acid, which acts as a free radical and destroys normal tissues and normal fat cells. It acts as a culture medium that lowers fat engraftment and increases necrotic material, increasing the probability of other secondary inflammation and bacteria. In addition, free oil remains between the walls of the adipocytes and the cells, acting like a film, which interferes with the oxygen supply that is critical for the survival of the transplanted adipocytes, which is an important cause of necrosis of the adipocytes.

For these reasons, free oils usually have to be removed before fat transplantation, but some of them are transplanted together causing problems. Particularly in the case of a large amount of transplantation, pre-oils gather at the bottom of the transplantation space to inflame or destroy tissues, and large granulomas are formed and touched like a tumor.

Conventionally, the following methods have been used to remove such red blood cells and preoil. The first is the most primitive method, in which the inhaled fat is placed in a funnel-shaped container until the mixture is separated. Over time, the inhaled fat gradually forms a layer from the bottom, in order of blood, body fluids, and pure fat, which releases impurities until the pure fat layer becomes bright yellow. However, this method alone is difficult to separate the pre-oil, it takes a long time disadvantage.

The second method is to wrap the inhaled fat with a cloth and squeeze it manually to separate the impurities. The squeezing force here squeezes the fat to separate the preoil from the fat cells, and the cloth serves as a filter to filter out various impurities. However, this method also takes a lot of time, the process is cumbersome, and above all, there is a risk of infection by air contact.

The third method is centrifugation after inhaling fat into a syringe-shaped container. When the inhaled fat is centrifuged, the red blood cells are located at the bottom of the layer and are clearly distinguishable from other components. However, the pre-oil is located at the top of the layer and is partially mixed with the upper part of the fat cell layer. The pressure from above the vessel is required to remove red blood cells, so there is a possibility that the upper layer of pre-oil and pure fat will be mixed again. Therefore, the pre-oil must be removed first, and the needle can be inserted into the upper layer of the container to extract only the pre-oil, or the container can be removed upside down by removing the piston or cap. Then, in the presence of only pure fat on the top layer, pressure is applied from above the container to compress the fat and discharge red blood cells. However, the former preoil discharge method requires time and labor, and the latter method may cause infection and loss of pure fat due to air contact.

Therefore, in each of the above methods, it is difficult to separate the most specific red blood cells and the least specific preoil from inhaled fat at the same time, which makes the process cumbersome or free from the worry of infection. In particular, the pre-oil is not effectively separated and ultimately does not achieve the desired volume replacement effect.

The fourth is the piston structure without a shaft inside the syringe-shaped container devised by the present inventors, and the piston is a piston head of a liposuction syringe having a sieve that allows air and moisture to pass through, but a fat can be filtered out. (Registration No. 0327374) is a method of removing air or moisture together in the process of inhaling fat by external pneumatic pressure, and filtering the moisture or pre-oil contained in the fat by pressurizing it at the stage before transplantation. . This is a drastic improvement of liposuction efficiency by using a general syringe-type container and external pneumatic pressure, it is possible to squeeze the fat without the centrifugation process, there is little possibility of contamination due to contact with the outside air during the treatment process In addition, the efficiency of removing red blood cells and pre-oil has an advantage over the above-mentioned methods, but there is a possibility that some pre-oil or red blood cells contained between fats remain in the compression process, and the compression pressure or suction pressure is appropriate and precise. If not controlled, fat cells may be discharged together and lost. In addition, since the fluid is forced through the body fluid, such as pre-oil by the external pneumatic pressure, the pore size of the filter is very small, such as 5 ~ 50㎛ and the likelihood of closure is increased, and the filter layer must also be formed very fine and precisely It is possible to prevent the leakage of the components.

The present invention collects by newly presenting a piston of a liposuction syringe, which is configured to automatically discharge the preoil component of fat sucked through a piston having a filtering means therein, by being easily separated by a centrifugal separation process to the rear of the piston. It is designed to have more detailed preoil removal ability without losing fat cells, reduce the risk of contamination and infection, and increase the fat engraftment rate.

The present invention for achieving the above object, in the piston of the syringe for liposuction implantation which is located inside the container in the form of a syringe and is configured without a shaft, is coupled to the piston body without a shaft, and the outer surface of the piston body Packings for maintaining airtightness with the cylinder inner wall of the container, pre-oil outlets connected to the front and rear of the piston body, and first and second openings provided at both inlets of the pre-oil outlets to open and close the pre-oil outlets by external force. A check valve, for fixing the first and second check valves in the main body, comprising opening and closing means consisting of first and second fixing covers having a through hole at the center thereof, and provided on the pre-oil discharge path. The piston of the liposuction syringe is characterized by filtering and pre-oil passing through the filtering means.

In addition, the piston is characterized by the piston of the liposuction syringe further includes a weight to increase the total weight of the piston.

In addition, the filtering means is characterized in that the piston of the liposuction syringe which is a mesh filter having a pore size of 10 ~ 100㎛.

The filtering means may include a cap sealing the front side of the preoil discharge port, a filtering outer peripheral surface provided at the piston body to maintain a constant distance from the inner circumferential surface of the container to filter fat and allow the preoil to pass therethrough; The piston of the liposuction syringe is characterized by a through hole communicating between the cap and the pre-oil outlet of the piston body between the filtering outer peripheral surface and the packing.

The present invention also relates to a piston of a liposuction syringe which is located inside a container in the form of a syringe and which is configured without a shaft, wherein the piston body without a shaft is coupled to the outer surface of the piston body and is airtight with the cylinder inner wall of the container. And a cap for sealing the front side of the pre-oil outlet, a pre-oil outlet which is connected to the front and rear of the piston body, and opening / closing means for opening and closing the pre-oil outlet. Filtering, consisting of a filtering outer circumferential surface at regular intervals from the inner circumferential surface of the container to pass through the pre-oil and a through hole communicating between the cap and the preoil outlet of the piston body between the outer circumferential surface and the packing. A piston of a liposuction syringe comprising a means is featured.

In addition, the pre-oil discharge port is composed of a plurality of holes formed to penetrate the front end and the main body end, the pre-oil discharge port is configured to be opened and closed by the opening and closing means consisting of a packing to be covered at the rear end of the piston body, and a locking screw for fixing the packing. It is characterized by the piston of a liposuction syringe.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show the piston structure according to the first embodiment of the present invention, Figures 3 to 5 show the action of the piston, the piston (a) according to the first embodiment is a piston without a shaft Pre-oil coupled to the main body 10A, the outer surface of the piston body 10A, the packing 20 for maintaining airtightness with the cylinder inner wall of the container b, and the front and rear of the piston body 10A. The outlet 300, the opening and closing means 400 of the outlet and the structure comprising a filtering means formed in the pre-oil discharge passage, the weight 60 is separately coupled to the rear of the piston body (10A) Has a structure. Each of the above components is made of a material harmless to the human body.

The container (b) is configured such that the liposuction and implantation process takes place in the same container with air contact excluded. The container (b) applied for this is combined with a rear stopper 110 to seal the container behind the container in the form of a syringe, as shown in (a) and (c) of Figure 6, the rear stopper 110 is an external pneumatic unit It is a structure that can be connected to the 120, the cannula 100 for injecting and injecting fat by inserting into the body at the container tip can be detached, and also centrifugal by closing the container tip as shown in Figure 6 (b) It is configured to be detachable front cap 130 so that the contents filled inside the container (b) does not flow to the outside.

The piston body 10A constituting the piston (a) is a structure without a shaft (shaft) that acts to inhale or discharge fat while advancing back and forth in close contact with the cylinder wall inside the container (b). The negative pressure or positive pressure provided to the external pneumatic unit 120 connected to the rear stopper 110 of b) acts like a shaft.

In addition, the piston body 10A is formed on the outer circumferential surface of the circumferential shape formed with synthetic resin, and two rows of annular grooves 11 are formed therein, and the packing 20 is coupled thereto. The packing 20 is a general packing element such as a rubber ring or a silicone ring, and a ring-shaped packing 20 is fitted into a groove 11 formed in the piston body 10A so that the contact surface between the piston a and the container b is provided. It acts to keep it confidential.

The filtering means consists of a circular mesh filter 50 having a pore size through which fat cells can be filtered and preoil can be passed through. The filter 50 automatically passes the pre-oil during centrifugation, but separates the erythrocytes, fat, and pre-oil layered in the container by centrifugal force as an element that properly filters the fat cells to obtain pure fat. In this process, only the pre-oil passes through the piston area, thereby automatically separating the pre-oil from the fat component.

The size of the hole of the filter 50 is approximately 10 ~ 100㎛ is appropriate, and the method of exiting the preoil in the form of seeping out of the pre-oil due to the difference in specific gravity by centrifugal separation to a slightly larger filter of about 100㎛ It can be used thickly or in multiple layers, and a filter with a net structure with a small hole of 50 micrometers or less can also be used by overlapping one layer or 2-3 layers.

In addition, a threaded portion is formed on the inner circumferential surface of the filter groove 12 formed at the distal end of the piston body 10A, and the threaded portion and the threaded portion 13a formed on the outer circumferential surface of the cap 13 are engaged. Therefore, it is possible to easily replace the filter 50 in accordance with the purpose or conditions of use in the manufacturing step or use step is configured to selectively use the size of the hole.

The cap 13 has a disc shape, and is formed with a plurality of holes 13b penetrating the front and rear portions so that fat sucked in and out, and the projection 13c having a shape corresponding to the front end portion of the container b is formed in the front portion. Formed. The size of the holes 13b should be large enough to prevent damage to tissues when the fat is coming in and out.

In addition, the cap 13 is configured to be disassembled and coupled to the piston body 10A by the screw portion 13a so that the filter 13 can be easily replaced with a filter having a size that meets the needs of the user or the user in the manufacturing or use stage of the piston. Provide an advantage. In addition, the projection 13c formed at the tip of the cap 13 allows the piston tip to be fitted to the tip of the container so that there is no gap when the piston (a) is engaged in the container b so that air having a high compressibility during fat suction remains in the container. It does not act to increase the suction efficiency, and when injecting fat provides the advantage of minimizing the loss of fat by pushing the fat in the container to the end.

The pre-oil outlet 300 in this embodiment is a passage through which the pre-oil passing through the filter 50 can be separated from the fat cells and moved to the rear region of the piston (a) in the container (b). It consists of a hole formed in the center so as to penetrate the front end and the rear end of 10A.

The opening and closing means 400 for opening and closing the preoil discharge port 300 blocks the preoil discharge port 300 when inhaling the fat from the body or injecting the fat in the container b into the body, thereby preventing the preoil discharge port 300. The negative pressure or positive pressure is applied to the external pneumatic unit, and during the centrifugal separation, the pre-oil outlet 300 is opened so that the pre-oil passing through the filter 50 exits to the rear of the container b.

The opening and closing means 400 of the preoil discharge port 300 may be configured in various ways to open and close the discharge port safely and externally without fear of contamination by an external operation in a state in which a biological component is filled in the container.

The opening and closing means 400 according to the present embodiment includes thin plate-shaped first and second check valves 401 and 402 provided at both inlets of the pre-oil discharge port 300 of the main body and opened and closed by external force. And first and second fixing covers 403 and 404 for fixing the second check valves 401 and 402 in the main body 10 and having a through hole in the center thereof.

As shown in FIG. 1, the first and second check valves 401 and 402 are edge portions 401a and 402a fixed in the main body 10 by fixing covers 403 and 404, and only a part of the edge portions are connected to the edge portion 401c. It is connected through the 402c and formed of the opening and closing parts (401b, 402b) formed in a size capable of opening and closing the pre-oil discharge port 300, the opening and closing parts (401b, 402b) is supported by the connecting parts (401c, 402c) easily bent deformation The free oil has a structure to easily open and close the free oil outlet 300 by the action of an external force.

In the pre-oil outlet 300 and the opening and closing means 400, the first check valve 401 or the second check valve 402 closes the pre-oil outlet 300 at the time of liposuction and transplantation, and the centrifuge When the pre-oil is removed by the first and second check valves 401 and 402 open the pre-oil discharge port 300.

The weight 60 is to improve the function of pre-oil separation by actively compressing the fat during centrifugal separation may be configured to perform the role of weight by configuring the piston itself with a heavy weight material, The rear end of the piston body 10A may be combined with a metal ring-shaped weight 60 so that the piston can be further advanced by the weight of the weight during centrifugation to squeeze the fat. And, as a result, the pre-oil can be discharged better.

Referring to FIG. 3 to FIG. 6, the inhalation of fat, separation of pure fat, and fat transplantation are as follows.

[Liposuction process]

As shown in (a) of FIG. 6, the cannula 100 is coupled to the front end of the container b, and the piston (a) is positioned inside the container. Then, the rear stopper 110 is closed to the rear of the container a, and the external pneumatic unit 120 is connected to the rear stopper 110 to push the piston a to the uppermost end of the container b with positive pressure (Fig. 3). After inserting the cannula 100 into the body, a negative pressure is formed in the rear space of the piston (a) to store fat collected from the human body in the front space of the piston.

At this time, when positive pressure is applied to the rear space of the piston (a), as shown in FIG. 5, the opening / closing portion 402b of the second rear check valve 402 is closed to the pre-oil outlet 300 by the positive pressure. Therefore, it is possible to move the piston (a) to the front side with a positive pressure. In addition, when the negative pressure is formed in the rear space of the piston (a), as shown in FIG. 3, the opening / closing portion 402b of the second rear check valve 402 is spaced apart from the pre-oil outlet 300 by a negative pressure action. However, since the opening / closing portion 401b of the front side check valve 401 is further in close contact with the preoil outlet 300 by the negative pressure of the rear space, the preoil outlet 300 is closed. Therefore, by moving the piston (a) to the rear space of the container (b) it is possible to store the fat collected from the human body in the front space of the piston (a).

[Pure Fat Separation Process]

After the liposuction is completed as shown in FIG. 6 (b), the front cap 130 is attached to the front end of the container b instead of the cannula (see FIG. 4), and the rear cap 110 is removed. When the centrifuge is placed in the centrifuge 140 and the centrifugal separation is performed, the opening / closing portion 401b of the first check valve 401 on the front side is deformed in the centrifugal force action direction by the centrifugal force of the centrifugal separator, thereby pre-oil discharge port. A spaced apart from 300 is opened.

At the same time, the weight 60 pressurizes the piston (a) to the front side by centrifugal force to apply pressure to the fat in the front space, so that the pre-oil is introduced into the pre-oil outlet (300). Since the opening and closing portion 402b of the rear second check valve 402 is pushed open by the pre-oil flowing into the pre-oil discharge port 300, both the first and second check valves 401b and 402b are opened. . Therefore, the pre-oil can be discharged to the space behind the piston (a) through the pre-oil outlet (300).

In addition, the fat in the container (b) is separated in order of blood + body fluid and fat components by the difference in specific gravity, so that the fat component occupies the upper layer of the container during centrifugation. Fat cells of the fat component are filtered through the filter 50 of the piston (a), the pre-oil is automatically discharged to the rear of the piston (a) through the pre-oil outlet 300 through the filter 50, the weight Weight 60 may advance the piston (a) during centrifugation to compress fat, thereby further draining preoil.

Then, the container (b) is turned upside down to completely remove the pre-oil, and then, the front cap 130 of the tip of the container (b) is removed, and a positive pressure is gradually applied to the rear of the piston by combining the pneumatic unit with the rear cap 110. Body fluids are drained, leaving only pure fat in the front space of the piston.

The centrifuge 140 shown in the drawing is a container (b) is standing vertically in the state where the rotor is stopped, using a centrifuge having a swing-out rotor is centrifuged while the container (b) is horizontal when the rotor rotates An example is shown.

[Fat transplantation process]

As shown in FIG. 6 (c), when the cannula 100 is coupled to the tip of the container (b) and inserted into a desired part of the body, and positive pressure is applied to the space behind the piston (a), the rear second check as shown in FIG. The opening / closing portion 402b of the valve 402 is closed in close contact with the preoil outlet 300 by positive pressure. Therefore, it is possible to move the piston (a) to the front side with a positive pressure to inject fat into the body, or to transfer the pure fat to the appropriate type syringe to be injected into the body.

7 is a photograph comparing an example of applying the piston according to the present invention to a container in the form of a syringe having a capacity of 60 cc and centrifuging by applying a general piston, wherein the piston of the present invention applied to the example is made of stainless steel ( sus304) using a mesh filter with a hole size of 60 µm, and a ring weight (approximately 13 g) is added to the piston body (approximately 8.5 g), and the total weight is 21.5 g. As a general piston with no hole through which free oil can pass, the shaft is removed and the same amount of fat is collected using pneumatic pressure. to be.

As can be seen by the above example, in the general piston, red blood cells are placed in the lower layer of the container, and a pre-oil + fat mixed layer is formed on the top layer, but when the piston is applied according to the present invention, the piston is positioned between the pre-oil and the fat layer. The fat layer and preoil layer are clearly separated.

These results indicate that during the centrifugation process, relatively small fat cells and preoil are separated from the erythrocyte layer and are pushed toward the center of rotation, and the fat cells are caught by the filter, which restricts the movement, and the preoil automatically passes through the filter to the rear of the piston. By moving to the side, fat cells and pre-oil are separated, and at the same time, the piston is advanced by centrifugal force and actively compresses the fat cells, thereby separating the pre-oil and fat by the interaction that pushes the pre-oil which is buried in the fat cells to the rear of the piston. Because it was done. In this process, the weight 60 acts to advance the piston (a) during centrifugation, thereby further compressing the fat so that the pre-oil is better discharged.

8 and 9 show a piston structure according to a second embodiment of the present invention, Figures 10 to 12 show the action of the piston. In the second embodiment, in the above-described first embodiment, the fat is filtered and the pre-oil is maintained by keeping the interval H between the inner circumferential surface of the container b and 10-100 μm on the front side of the piston body 10B. A plurality of through holes 15 are formed between the filtering outer circumferential surface 14 and the packing 20 so as to communicate with the pre-oil outlet 300 of the piston body 10B. There is a difference between forming, not forming a through hole in the cap 13A, and not using a filter, and the configuration and operation are the same as in the first embodiment with respect to the remaining components. Therefore, the same reference numerals are given to the same parts, and the detailed configuration and operation description are omitted.

According to the configuration of the second embodiment, the liposuction process, the pure fat separation process, and the fat transplantation process can be performed as in the first embodiment. That is, in the liposuction process, when negative pressure is formed in the rear space of the piston (a) as shown in FIG. 10, the opening / closing portion 402b of the rear second check valve 402 is spaced apart from the preoil discharge port 300 by a negative pressure action. The opening / closing portion 401b of the front side check valve 401 is more closely contacted with the preoil outlet 300 by the negative pressure of the rear space, thereby closing the preoil outlet 300, so that the piston (a) By moving to the rear space of b) it is possible to store the fat collected from the human body in the front space of the piston (a).

In addition, after the liposuction is completed, the pure fat separation process by the centrifuge 140 (refer to FIG. 6 (b)), as shown in FIG. 11, the opening and closing portion 401b of the front side first check valve 401 is The centrifugal force of the centrifuge deforms the centrifugal force in the direction of action, thereby opening it apart from the preoil outlet 300. At the same time, the weight 60 pressurizes the piston (a) to the front side by centrifugal force to apply pressure to the fat in the front space, so that the pre-oil flows into the pre-oil discharge port 300, and the second side check valve ( Since the opening and closing portion 402b of the 402 is pushed open by the pre-oil flowing into the pre-oil discharge port 300, both the first and second check valves 401b and 402b are opened. Therefore, the pre-oil can be discharged from the front space of the piston (a) through the pre-oil outlet 300 to the rear space.

In addition, the fat in the container (b) is separated in order of blood + body fluid and fat components by the difference in specific gravity, and the fat component is occupied in the upper layer of the container during centrifugation, and the fat cells in the fat component are the inner circumference of the container (b). And filtered by the outer circumferential surface 14 of the piston body 10B maintaining a spacing of 10 to 100 μm, and the pre-oil passes through the circumferential outer surface 14 of the filtering. The pre-oil passing through the filtering outer circumferential surface 14 is automatically discharged to the rear of the piston (a) by moving to the pre-oil outlet 300 through the through hole 15 and passing through the pre-oil outlet (300).

In addition, in the fat transplantation process, as shown in FIG. 12, when positive pressure is applied to the rear space of the piston (a), the opening / closing portion 402b of the rear second check valve 402 is more closely attached to the preoil discharge port 300 by positive pressure. Is closed. As a result, the piston (a) can be moved forward by positive pressure, so that fat can be injected into the body, or pure fat can be transferred to an appropriate type of syringe to be injected into the body.

As described above, according to the configuration of the second embodiment, the same liposuction process, pure fat separation process, and fat transplantation process as in the first embodiment can be performed, and the cost of parts reduction compared to the first embodiment can be achieved by not using a filter. Savings and assembly can be improved.

13 and 14 illustrate a piston structure according to a third embodiment of the present invention, and FIGS. 15 to 17 show the action of the piston. In the third embodiment, in the above-described second embodiment, the screw hole 41 is formed in the center of the piston body 10C, and a plurality of pre-oil discharge ports 30 are formed around the piston body, 10C) the pre-oil discharge port 30 can be opened and closed by the packing 43 by coupling the lock screw 44 to the screw hole 41 of the pre-oil discharge port 30 through the packing 43 at the rear side. There is a difference in the configuration of one opening and closing means 40, and the rest of the configuration is the same as that of the second embodiment. Therefore, the same reference numerals are given to the same parts as in the second embodiment, and the detailed configuration and description of the operation are omitted.

According to the configuration of the third embodiment, the liposuction process, the pure fat separation process, and the fat transplantation process can be performed as in the first and second embodiments. That is, in the liposuction process, as shown in FIG. 15, after tightening the lock screw 44 to close the preoil outlet 30 with the packing 43, a negative pressure is formed in the space behind the piston (a). By moving to the rear space of the container (b) it is possible to store the fat collected from the human body in the front space of the piston (a).

In addition, after the liposuction is completed, the pure water fat separation process by the centrifuge 140 (see Fig. 6 (b)), as shown in Figure 16, by loosening the locking screw 44, packing 43 and pre-oil When the gap is formed between the outlets 30, the pre-oil outlet 30 is opened. In this state, when the centrifugal force is rotated by the centrifuge 140 to act on the centrifugal weight, the weight 60 presses the piston a to the front side by the centrifugal force and thus pressurizes the fat in the front space. Through the pre-oil discharge port 30 can be discharged from the front space of the piston (a) to the rear space.

In addition, the fat in the container (b) is separated in order of blood + body fluid and fat components by the difference in specific gravity, and the fat component is occupied in the upper layer of the container during centrifugation, and the fat cells in the fat component are the inner circumference of the container (b). And filtered by the filtering outer circumferential surface 14 of the piston body 10C maintaining a spacing of 10 to 100 μm, and the pre-oil passes through the filtering outer circumferential surface 14. The pre-oil passing through the filtering outer circumferential surface 14 is automatically discharged to the rear of the piston (a) by moving to the pre-oil outlet 30 through the through hole 15 and passing through the pre-oil outlet (30).

In addition, the fat transplantation process, as shown in FIG. 17, closes the preoil outlet 30 by retightening the locking screw 44, and when the positive pressure is applied to the rear space of the piston, the piston is moved forward. It can be moved to the side so that fat can be injected into the body, or pure fat can be injected into an appropriately shaped syringe and injected into the body.

In this manner, according to the configuration of the third embodiment, the same liposuction process, pure fat separation process, and fat transplantation process as in the first and second embodiments can be performed, and instead of the locking screw 44, the pre-oil outlet ( In the case of using a shaft (not shown) having a screwable portion in the threaded hole 41 of 30), the piston a may be operated directly by hand without actuating negative or positive pressure by an external pneumatic unit. have.

Further, according to the configuration of the third embodiment, since the filter 50 of the first embodiment and the check valves 401 and 402 of the second embodiment are not used, it is particularly suitable for a small liposuction syringe, and a space behind the piston. It can be effectively used in syringes that are difficult to apply negative pressure or positive pressure.

 As described above, the present invention is not limited by the embodiments described above as having the technical idea to effectively separate the fat and pre-oil components sucked through the piston having a filtering means therein, It is also not to be excluded that there are embodiments in various ways that fall within the scope of the invention.

According to the present invention, the process of separating pre-oil from fat is greatly simplified, thus reducing labor, and there is no loss of collected fat cells and there is no risk of contamination or infection, and thus the engraftment rate of fat can be improved by perfect pre-oil separation. This makes it possible to transplant large amounts of fat and effectively use it for surgery that requires large volume replacements such as breast enlargement.

Claims (10)

A piston of a syringe for liposuction implanted in a syringe shaped container and configured without a shaft, The piston body without the shaft, A packing coupled to the outer surface of the piston body to maintain airtightness with the cylinder inner wall of the container; With the pre-oil outlet which connects in front and back of the piston body, First and second check valves provided at both inlets of the preoil discharge port to open and close the preoil discharge port by an external force, and for fixing the first and second check valves in the main body, having a through hole at the center thereof. Opening and closing means consisting of first and second fixing covers, And a filtering means provided on the preoil discharge path to filter fat and pass the preoil. The piston of claim 1, wherein the piston further includes a weight to increase the total weight of the piston. The piston of claim 2, wherein the weight is formed in a ring shape made of metal and is coupled to the rear side of the main body. The piston of a liposuction syringe according to claim 1 or 2, wherein said filtering means is a mesh filter having a pore size of 10 to 100 µm. 5. The filter of claim 4, wherein the filter is coupled to a filter groove formed at the front end of the main body, and the filter groove has a screw coupling structure and is formed by a cap having a plurality of holes penetrating the front and rear surfaces thereof so as to pass through the pre-oil. The piston of the liposuction syringe, characterized in that the closing structure is provided to loosen the cap and replace the internal filter. 6. The piston of claim 5, wherein the front portion of the cap is provided with a customized projection to be fitted with the tip of the container. 3. The filter according to claim 1 or 2, wherein the filtering means comprises: a cap for sealing the front side of the preoil outlet, and a constant distance from the inner circumference of the container so as to be provided in the piston body to filter fat and pass the preoil. A piston of a liposuction syringe, characterized in that it consists of a through-hole communicating between the cap and the preoil outlet of the piston body between the filtering outer perimeter surface and the packing to maintain the outer periphery. A piston of a syringe for liposuction implanted in a syringe shaped container and configured without a shaft, The piston body without the shaft, A packing coupled to the outer surface of the piston body to maintain airtightness with the cylinder inner wall of the container; With the pre-oil outlet which connects in front and back of the piston body, Opening and closing means for opening and closing the preoil outlet; A cap for sealing the front side of the preoil discharge port, a filtering outer circumferential surface provided at the piston body to maintain a constant distance from the inner circumferential surface of the container to filter fat and allow the preoil to pass therethrough; A piston of a liposuction syringe, characterized in that it comprises filtering means comprising a through hole communicating between the cap and the preoil outlet of the piston body between the packings. 9. The piston of claim 8, wherein an interval between an inner circumferential surface of the container and an outer circumferential surface of the container is 10 to 100 µm. 10. The method of claim 8 or 9, wherein the pre-oil discharge port is composed of a plurality of holes formed to penetrate the front end and the rear end of the main body, the pre-oil discharge port is a packing that covers the rear end of the piston body, and a locking screw for fixing the packing A piston of a liposuction syringe, characterized in that configured to be opened and closed by an opening and closing means.

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