KR102527624B1 - Cannula for fat inhalalation - Google Patents

Abstract

In the present invention, the medical cannula includes an insertion part inserted into the body to suck fat from the fat layer in the body, and a main body in the form of a hollow tubular body through which the fat introduced through the suction part moves. At least one recessed portion in which a portion of the insertion portion is recessed toward the inside; and a suction hole formed in the recessed portion and serving as a passage through which the fat is sucked into the inside by negative pressure.

Description

Cannula for liposuction {CANNULA FOR FAT INHALALATION}

The present invention relates to a medical cannula, and more particularly, to a liposuction cannula that is inserted into a specific part of the body to suck or inject fat.

In recent years, the number of obese people due to poor diet and lack of exercise is steadily increasing. In particular, obesity is one of the diseases, especially arteriosclerosis, diabetes, and other various adult diseases.

As interest in body shape and appearance increases, liposuction for cosmetic purposes is widely performed as well as the treatment of obese patients. Liposuction is a procedure that artificially removes excess fat accumulated in the body.

Such liposuction is generally a method of removing fat cells by inhaling and removing a cannula having a pipe shape by inserting a cannula into a fat layer in the body and then moving it forward and backward. On the other hand, lipoinjection is a procedure in which fat is injected into areas where there is a lack of fat in the body.

A cannula is a tube inserted into the body mainly for such medical purposes, and is a kind of medical device for passing liquid or air. A cannula is a thin tube-shaped tube that is inserted to inject drugs into the body or to draw out bodily fluids. It is used to take out fluid filled in the chest or abdominal cavity, to collect blood by inserting it into a blood vessel, or to breathe by inserting it into the trachea during a tracheostomy. It is a tool used

In particular, a cannula with a thin metal tube is used for fat extraction or fat injection in the process of fat transplantation, and its tip is blunt compared to general medical needles. is to minimize

However, during liposuction using a conventional cannula, the operator inserts the cannula into the fat layer of the patient's body in order to evenly inhale the fat in the skin or along the fat part to be sucked into the skin. As the cannula is moved forward and backward or left and right to separate and destroy fat cells, the area where fat is accumulated is intensively treated, so there is an unavoidable problem in the patient's bleeding during liposuction. In addition, the risk of excessive bleeding still existed due to the same reason during the procedure of injecting fat into the body.

Korean Patent Application No. 2016-0114827 (Application No. 10-2016-0114827 (filed on September 7, 2016) is related to a method for manufacturing a cannula for skin plastic surgery. The invention relates to a method for manufacturing a cannula for skin plastic surgery, The present invention relates to a method for manufacturing a cannula used in the procedure of embedding a chamber in the skin when removing skin wrinkles. In the cannula for skin plastic surgery including a guide member fixed to and guiding a chamber, the guide member is inserted from the tip of the needle to the inside and extends from the insertion portion and the insertion portion to guide the chamber, and is attached to the distal end of the needle. Characterized in that the guide member is fitted and fixed to the end of the needle without welding, including a stepped portion having a stepped portion corresponding to the thickness of the needle to be in contact and a protruding portion extending from the outer circumferential surface of the stepped portion and protruding from the tip of the needle in a streamlined shape. It is a method for manufacturing a cannula for skin plastic surgery.

And Korean patent application (application number 2010-0138482 (application date 2010.12.30)) Intelligent liposuction cannula of the present invention is formed as a tube body with an empty inside, a plurality of suction ports are formed at the tip, and fat is melted and sucked from the outer circumferential surface. A cannula that generates high frequency to facilitate this, and determines the treatment area by measuring impedance through the high frequency; A temperature sensor installed inside the cannula to measure the temperature of the treatment area according to the generation of high frequency; and a handpiece to which the cannula is coupled. It relates to an intelligent liposuction cannula comprising a.

Korean Patent Application No. 2016-0114827 Korean Patent Application No. 2010-0138482

According to an embodiment of the present invention, it is intended to provide a medical cannula capable of minimizing tissue damage during liposuction.

Among the embodiments, a medical cannula may include: an insertion unit inserted into a body to suck fat from a fat layer in the body; and a main body in the form of a tubular body with an empty interior, through which the fat introduced through the intake unit moves, wherein the insertion unit includes at least one recessed portion in which a partial region of the insertion unit is recessed toward the inside; and a suction hole formed in the recessed portion and serving as a passage through which the fat is sucked into the inside by negative pressure.

Here, the insertion part may include one or more depressions, and the total area of the depressions may be 10 percent or more of the area of the insertion part.

Also, here, the curvature of the depression may decrease as it approaches the inlet.

Also, the inlet may be formed at a central portion of the depressed portion, and the curvature of the central portion of the depressed portion may be smaller than a reciprocal of a depth of the depressed portion.

In addition, the inlet is formed in the center of the depression, and the radius of curvature of the center of the depression may be greater than the radius of the cross section of the insertion section.

In addition, according to another embodiment of the present invention, a cannula that is partially inserted into the body for liposuction and includes a suction port for suctioning fat; a handpiece coupled to the rear end of the cannula in contact with the cannula; and an aspirator connected to the cannula and generating a negative pressure to provide a suction power through which fat is suctioned through the suction hole.

Also, here, the cannula is inserted into the body through the suction port to inhale fat from the fat layer in the body; and a main body in the form of a tubular body with an empty interior, through which the fat introduced through the suction unit moves. wherein the suction port is located at the center of a depression formed by a partial area of the insertion portion being depressed toward the inside, and may serve as a passage through which the fat is sucked into the inside of the cannula by the negative pressure.

The insertion part may include one or more recesses, and the total area of the recesses may be 10 percent or more of the area of the insertion part.

Here, the curvature of the depression may decrease as it approaches the inlet.

The inlet may be formed at a center of the depression, and the curvature of the center of the depression may be less than a reciprocal of a depth of the depression.

Also, a radius of curvature of the central portion of the depression may be greater than a radius of a cross section of the insertion portion.

The disclosed technology may have the following effects. However, it does not mean that a specific embodiment should include all of the following effects or only the following effects, so it should not be understood that the scope of rights of the disclosed technology is limited thereby.

According to one embodiment of the present invention, tissue damage caused during liposuction can be minimized.

1 is a view showing a liposuction device including a cannula for liposuction.
2 is a view showing a cannula for liposuction according to an embodiment of the present invention.
3 and 4 are views showing a front view of the cannula.
5 and 6 are views showing a side view of the cannula.
7 and 8 are cross-sectional views of a cannula;

Since the description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiment can be changed in various ways and can have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, the scope of the present invention should not be construed as being limited thereto.

Meanwhile, the meaning of terms described in this application should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from another, and the scope of rights should not be limited by these terms. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element.

It should be understood that when an element is referred to as being “connected” to another element, it may be directly connected to the other element, but other elements may exist in the middle. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that no intervening elements exist. Meanwhile, other expressions describing the relationship between components, such as “between” and “immediately between” or “adjacent to” and “directly adjacent to” should be interpreted similarly.

Expressions in the singular number should be understood to include plural expressions unless the context clearly dictates otherwise, and terms such as “comprise” or “having” refer to an embodied feature, number, step, operation, component, part, or these. It should be understood that it is intended to indicate that a combination exists, and does not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

In each step, the identification code (eg, a, b, c, etc.) is used for convenience of explanation, and the identification code does not describe the order of each step, and each step clearly follows a specific order in context. Unless otherwise specified, it may occur in a different order than specified. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

In addition, it will be appreciated that the application is not limited to the details of the configuration and arrangement of components described in the following detailed description or shown in the drawings. The invention is capable of being implemented and practiced in other embodiments and of being carried out in various ways. Also, device or element orientation (e.g., "front", "back", "up", "down", "top", "bottom") The expressions and predicates used herein with respect to terms such as ", "left", "right", "lateral", etc. are only used to simplify the description of the present invention and related devices. Or it will be appreciated that it does not indicate or imply that an element simply must have a particular orientation. Also, terms such as “first,” “second,” and “third” are used herein and in the appended claims for descriptive purposes and are intended to indicate or imply relative importance or purport. not intended

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Terms defined in commonly used dictionaries should be interpreted as consistent with meanings in the context of the related art, and cannot be interpreted as having ideal or excessively formal meanings unless explicitly defined in the present application.

A cannula according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8 .

1 is a view showing a liposuction device according to an embodiment of the present invention. 2 is a view showing a cannula for liposuction according to an embodiment of the present invention. The cannula for liposuction according to an embodiment of the present invention may be used by being connected to the liposuction device 10 as shown in FIG. 1 .

The liposuction device 10 includes a cannula 100 according to an embodiment of the present invention, a handpiece 110 that a surgeon can hold by hand and handle the treatment site where the cannula is inserted, and a rear end of the handpiece 110. It includes a tube 120 mounted on the body and through which fat is communicated to become a passage through which the fat sucked from the body moves to the collection space, and an inhaler 130 that collects the separated fat from the body by providing suction power.

In addition, the cannula 100 is inserted into the body and is formed of an insertion part 210 provided with one or more suction ports through which fat is sucked from the fat layer 20 in the body, and a main body 220 formed of an empty tubular body and moving the sucked fat , And coupled to the hand piece 110 includes a fastening portion 230 through which the cannula 100 is physically connected to the inhaler 130.

Liposuction is a procedure that uses negative pressure to extract and remove fat tissue from the body through a thin tube called a cannula. At this time, there is a suction hole 310 at the end of the cannula structure, that is, the insertion part 210, in the form of an opening through which the inside of the cannula communicates to the outside, to which the negative pressure generated by the inhaler 130 is applied, for extraction of adipose tissue. Through 310, adipose tissue is extracted from the body into the cannula.

However, in order to efficiently dismantle and extract fat tissue, the operator performs a stroke motion. The stroke operation means reciprocating motion of the cannula 100 or the like in a straight direction.

That is, the cannula 100 penetrates the skin and is inserted into the skin. In particular, in the case of liposuction, the cannula 100 is inserted into the fat layer 20 inside the skin, and then repeatedly separates and destroys fat cells through a stroke motion moving back and forth or left and right. do the work of In addition, there are cases in which repetitive insertion is performed during fat or filler transplantation, and during procedures such as liposuction, blood vessels may be pierced to cause bleeding and bruising, and skin tissue may be damaged or ruptured.

That is, in the state where the operator inserts the cannula 100 into the skin, the fat dissolved by the medicine is moved with the hand piece 110 to separate it, and then through the inlet 310 formed in the insertion part 210 of the cannula 100. The fat is inhaled, and the fat is strongly inhaled by the suction power provided by the inhaler 130, moves through the tube 120, and is stored in a separate storage in the inhaler 130.

However, as the stroke motion of the cannula 100 is performed, micro damage occurs to human tissue, especially at the boundary of the inlet 310, for example, the part where the cannula is cut to form the inlet 310, which causes bruises. There were problems accompanied by various complications such as , edema, and bleeding.

If the granular structure is the fat tissue that needs to be extracted and removed from the human body during liposuction, the blood vessels and nerves that must be preserved without damage despite liposuction are long tubular structures. It is most desirable that the cannula have a structure that allows suction of granular structures (fat) while minimizing and preserving damage to tubular structures (nerves, blood vessels, etc.).

In the case of micro-collision between the cannula 100 and human tissue, which inevitably occurs repeatedly during the liposuction process, the present invention allows suction of the granular structure of fat cells while minimizing damage to tubular structures such as blood vessels and nerves. In the embodiment of ?, a structure in which the suction port 310 for liposuction provided at the end of the insertion part 100 of the cannula is recessed in a streamlined shape toward the inside of the tubular structure of the cannula 100, unlike the conventional one, is proposed.

3 and 4 show a front view of the cannula. Here, Figure 3 shows a front view of a cannula according to the prior art, and Figure 4 shows a front view of a cannula according to an embodiment of the present invention.

And Figures 5 and 6 show a side view of the cannula. Here, FIG. 5 shows a side view of a cannula according to the prior art, and FIG. 6 shows a side view of a cannula according to an embodiment of the present invention.

And Figures 7 and 8 show cross-sectional views of the cannula. Here, FIG. 7 shows a cross-sectional view of a cannula according to the prior art, and FIG. 8 shows a cross-sectional view of a cannula according to an embodiment of the present invention.

According to the prior art, in the conventional cannula, as shown in FIGS. 3, 5 and 7, the inlet 310 is formed on the same plane as the surface of the cannula. Therefore, the inlet 310 is directly exposed to the surface of the cannula.

On the other hand, according to the embodiment of the present invention, a certain region of the insertion portion 210 of the cannula 100 has a shape of being depressed, and the depressed portion is referred to as the depression portion 320. Referring to FIGS. 4, 6 and 8, the depression 320 is shown.

In addition, the inlet 310 is formed inside the recessed part 320, and the inlet 310 may be mainly located in the most deeply recessed part of the recessed part 320, that is, in the center of the recessed part 320. In FIGS. 7 and 8, the suction port 320 appears to be a missing part in the cylindrical structure of the cannula. In particular, referring to FIG. 8 , the inlet 320 may be located at the most central part of the recessed part 320, that is, at the most deeply recessed part.

A suction port 310 in the form of an opening through which body fat is sucked into the cannula is formed in the depression 320 thus created. For example, a depression 320 exists in a portion of the insertion portion 210, and the depression 320 has a smooth shape, such as a streamlined shape or an oval shape, and moves toward the inside of the cannula 100 around the suction port 310. sink in One or more suction ports 310 may be formed in one recessed portion 320 . In particular, a streamlined or elliptical recessed shape of the recessed portion 320 according to an embodiment of the present invention is shown in FIGS. 4 and 8 .

Since the recessed portion 320 exists in the cannula 000, the volume of the insertion portion 210 of the cannula 100 is reduced by as much as the recessed portion, and structures such as blood vessels and the cannula are not damaged even when a stroke operation is performed during liposuction. The chance of collision or friction is also reduced.

Therefore, according to the embodiment of the present invention, the recessed portion 320 is recessed over a certain area rather than deeply recessed in a small area, which can help reduce or prevent body tissue damage. This coincides with the current trend of gradually decreasing the thickness of the cannula 100. This is because as the cannula 100 becomes thinner, it is difficult to secure the depth of depression of the depression 320 and it may be easier to increase the depression area.

Accordingly, the depression 320 may be formed in a wide and gentle shape as shown in FIGS. 4 and 6 . The depression 320 may be formed in the shape of a hemisphere, but may also be formed in an elliptical or streamlined shape as described above.

Therefore, the curvature of the depression 320 may not be the same at all points within the depression 320, and the curvature at each point within the depression 320 may change as it approaches the center. Curvature here refers to the degree of curvature of a spatial figure in geometry, and can be defined as the inverse of the radius of curvature.

When an imaginary circle that bends to the same extent as the curve passing through this point is drawn at any location on a curved surface or curve, the center of this imaginary circle is defined as the center of curvature, and the distance from that point to the center of curvature is defined as the radius of curvature. do.

Therefore, the relationship between the center of curvature and the radius of curvature at a point on a given curve is as follows. A small radius of curvature means that the curve is relatively much curved, and a large radius of curvature means that the curve is relatively small and gentle. Therefore, the radius of curvature of a straight line is infinite. Therefore, the curved portion of the depression 320 has a large curvature and a small radius of curvature, and the small curved portion has a small curvature and a large radius of curvature.

The insertion portion 210 of the cannula 100 may include one or a plurality of depressions. In addition, in order to have the effect of protecting human tissue through the formation of the depression 320, the area of the depression may be 10% or more of the total area of the insertion portion 210 inserted into the body. Also, the depth of the depression may be 5% or more of the cross-sectional diameter of the insertion part 210 .

Here, the area of the recessed part 320 may mean the sum of the areas of the recessed part 320 when a plurality of recessed parts 320 exist in the insertion part 210 .

In addition, the curvature of the recessed portion 320 may decrease as it gets closer to the suction port 310 than to the edge of the recessed portion 320, that is, a portion closer to the surface of the insertion portion 210. That is, the curvature of the recessed portion 320 becomes gentle toward the center of the recessed portion 320, so that the recessed portion 320 can be formed relatively wide and ?A rather than a narrow and deeply recessed shape.

In addition, as described above, the inlet 310 may be formed in the center of the depression 320. When the curvature of the center of the depression is smaller than the reciprocal of the depth of the depression, the inside of the depression 320 is formed as a wide and gently curved surface. It can be.

In addition, the inlet 310 is formed at the center of the depression 320. At this time, the radius of curvature of the center of the depression 320 is the same as the radius of the cross section of the insertion section 210, or the cross section of the insertion section 210. can be greater than the radius of

As described above, in the embodiment of the present invention, a suction port 310 for sucking fat is formed inside the depression 320 in the insertion portion 210 of the cannula 100, which is particularly inserted into the body. is molded so as to be gently depressed in the inner direction of the cannula (100). As a result, even if the cannula 100 moves according to the stroke motion inside the body during the liposuction procedure, damage to blood vessels or nerves, which are "tube structures," is minimized and preserved, while selectively selecting only granular fat tissue. can be inhaled with.?

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be done.

10: liposuction device
100: cannula
110: handpiece
120: tube
130: inhaler

Claims (10)

In the medical cannula,
an insertion unit inserted into the body to suck fat from the fat layer in the body; and
a main body in the form of a tubular body with an empty interior, into which the fat sucked through the insertion part moves; Including,
Here, the insert
at least one recessed part in which a partial region of the insertion part is recessed toward the inside in a wide and gentle shape; and
And a suction hole formed in the center of the depression and serving as a passage through which the fat is sucked into the inside by negative pressure,
The curvature of the depression decreases as it approaches the inlet so that the inside of the depression is formed as a wide and gently curved surface, the curvature of the center of the depression is smaller than the reciprocal of the depth of the depression, and the center of the depression is smaller than the reciprocal of the depth of the depression. A cannula for liposuction, characterized in that the radius of curvature of is greater than the radius of the cross section of the insertion portion. According to claim 1,
A cannula for liposuction, characterized in that the sum of the areas of the depressions is 10% or more of the area of the insertion part.
delete delete delete a cannula, a part of which is inserted into the body for liposuction, and includes a suction port for suctioning fat;
a handpiece coupled to the rear end of the cannula in contact with the cannula; and
An inhaler connected to the cannula and generating a negative pressure to provide a suction force to inhale fat through the suction port;
wherein the cannula
an insertion unit that is inserted into the body and sucks fat from the fat layer in the body through the suction port; and
a main body in the form of a tubular body with an empty interior, into which the fat sucked through the insertion part moves; Including,
Here, the inlet is
A partial region of the insertion part is located in the center of the depression formed by being depressed in a wide and gentle shape toward the inside, and becomes a passage through which the fat is sucked into the inside of the cannula by the negative pressure,
Here, the curvature of the depression decreases as it approaches the inlet so that the inside of the depression is formed as a wide and gently curved surface, the curvature of the center of the depression is smaller than the reciprocal of the depth of the depression, and The liposuction device, characterized in that the radius of curvature of the central portion is greater than the radius of the cross section of the insertion portion. According to claim 6,
The insertion portion includes one or more of the depressions,
The liposuction device, characterized in that the sum of the area of the recessed portion is 10% or more of the area of the insertion portion.
delete delete delete

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