KR102372360B1 - Multi catheter - Google Patents

Abstract

The present invention relates to a composite catheter capable of injecting liquids, and by using a lever to move a piston for adjusting the flow rate of liquids back and forth to vary the volume of the first retention part in which liquids are temporarily stored, to adjust the injection amount of liquids discharged to a tube It relates to a composite catheter that makes it possible.

Description

Complex catheter capable of controlling the injection amount of liquids {MULTI CATHETER}

The present invention relates to a composite catheter capable of injecting liquids, and by using a lever to move a piston for adjusting the flow rate of liquids back and forth to vary the volume of the first retention part in which liquids are temporarily stored, to adjust the injection amount of liquids discharged into a tube It relates to a composite catheter that makes it possible.

A catheter is a general term for a tubular medical device that can be inserted into the body. There are various types, such as measuring venous pressure and injecting liquids such as drugs such as saline or contrast agents into the body.

These catheters are, as can be seen in Patent Registration No. 10-1632801, Registration Patent No. 10-1678069, Registration Patent No. 10-1801544, Publication No. 10-2016-0071254, etc., their use or treatment It consists of various materials, shapes, and structures depending on the part, and the types are subdivided for each use.

On the other hand, catheters can inject and inject liquids such as saline into the body at the same time during the procedure. There is a problem in that it is difficult for the operator to arbitrarily and precisely control the injection amount of the liquid.

Accordingly, the present invention has been devised to solve the above problems,

During the procedure, the volume of the first retention part in which the liquid is temporarily stored is changed by using the lever to move the piston for adjusting the flow rate of the liquid by using the lever so that the operator can easily and accurately control and spray the liquid, such as saline, and discharge it into the tube. An object of the present invention is to provide a composite catheter that can control the injection amount of the liquid.

In order to achieve the above object, the composite catheter according to the present invention,

a body having an inner mounting portion and a front mounting hole, and including a lever rotating in a circumferential direction;

Doedoe fitted into the mounting hole, a tube including an outer tube into which a liquid is injected and sprayed, and an inner tube that is built into the outer surface and a part of the injected liquid is recovered and discharged;

a cylinder mounted on the mounting unit and having a first mounting hole into which the rear end of the exterior is fitted, and a draw-out hole connected to the rear of the first mounting hole and formed with an open rear side;

An inner wall part that is inserted into the withdrawal hole and moves forward and backward, has a second mounting hole into which the rear end of the inner tube is fitted, and is connected to a liquid injection pipe, is connected to the liquid injection pipe from the front of the inner wall part and is formed with an open front 1 Retention part, a piston for flow rate control having a second retention part formed with a sealed rear surface at the rear of the inner wall part and connected to a liquid discharge pipe; and

Including; power transmitting means for converting the rotation of the lever to the forward and backward of the piston;

By moving the piston forward and backward with the lever to vary the volume of the first retention part, it is characterized in that the injection amount of the liquid discharged from the tube can be adjusted.

And the composite catheter according to the present invention,

The power transmission means,

a screw groove formed on the inner circumferential surface of the lever;

a first guide groove formed to have a predetermined length forward and backward through one side of the cylinder;

It is characterized in that it includes a driving pin coupled to protrude from one side of the piston, slidingly coupled to the first guide groove, and having an outer end fitted into the screw groove of the lever.

Also in the composite catheter according to the present invention,

The power transmission means,

a screw groove formed on the inner circumferential surface of the lever;

It is formed on the outer circumferential surface of the piston and characterized in that it comprises a screw thread engaged with the screw groove.

Further in the composite catheter according to the present invention,

The body and the cylinder include a second guide groove formed to have a predetermined length in the front and back through one side of the position corresponding to each other,

The piston is coupled to protrude from one side and is slidably coupled to the second guide groove to include an identification pin that enables the front and rear positions of the piston to be identified.

Composite catheter according to the present invention,

In a complex catheter used for various procedures, especially in a complex catheter capable of injecting liquids such as saline, the operator directly Increase the convenience of the procedure by adjusting the injection amount easily and accurately,

The piston moves forward and backward in a pin type or screw type, making it easy to manufacture.

There is an effect that the operator can precisely and quickly control the amount of liquid sprayed by identifying the actual forward/backward position of the piston without depending on the sense of rotation of the lever.

1 is a perspective view of a first embodiment according to the present invention;
Fig. 2 is a cross-sectional view of Fig. 1;
3 is a perspective view of a second embodiment according to the present invention;
Fig. 4 is a cross-sectional view of Fig. 2;
5 is a front view and a cross-sectional view of a main part for explaining a quadring according to the present invention.

Since the present invention can have various changes and can have various forms, implementation examples (態樣, aspects) (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference numerals, particularly the tens and one digit, or the same tens, one, and alphabetic reference numerals indicate members having the same or similar functions, and unless otherwise specified, each The member indicated by the reference sign may be understood as a member conforming to these standards.

In addition, in each drawing, components are expressed in exaggeratedly large (or thick), small (or thin) or simplified in size or thickness in consideration of convenience of understanding, but the protection scope of the present invention is limited by this. it shouldn't be

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as comprises or consists of are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

~1~, ~2~, etc. described in the present specification are only to be referred to to distinguish that they are different components, and are not limited to the order of manufacture, and their names in the detailed description and claims of the invention are may not match.

In describing the composite catheter according to the present invention, for convenience, if an approximate direction standard that is not strict is specified with reference to FIG. 1, the direction in which gravity acts is the downward direction as it is seen, up, down, left and right, and related to other drawings In the detailed description and claims of the invention, unless otherwise specified, directions are specified and described according to this standard.

Hereinafter, the composite catheter according to the present invention will be described with reference to the accompanying drawings.

The present invention relates to a composite catheter capable of injecting liquids such as saline, and as shown in FIGS. It includes a power transmitting means for converting the rotational force of the cylinder 60 , the piston 70 , and the lever 30 to a straight line of the piston 70 to adjust the water injection amount to move the piston 70 forward and backward.

The main body (M) has an internal mounting portion (11) and a front mounting hole (12), and includes a lever (30) rotating in the circumferential direction.

Specifically, the main body (M) is composed of a first body 10 at the front end, a second body 20 at the rear end, and a lever 30 coupled between the bodies 10 and 20,

A hollow mounting portion 11 is provided in the inner space of the bodies 10 and 20 and the lever 30 , the mounting hole 12 is provided at the front end of the first body 10 , and the second body A connector part (C) is provided on the rear end side of (20) so that a cable (not shown) including a liquid injection pipe and an electrode wire is connected to the catheter medical device.

At this time, in the first embodiment of the present invention, the first body 10 and the second body 20 are connected by bolting the front and rear ends of the cylinder 60 to be spaced apart from each other by a predetermined distance, and the lever 30 ) rotates in the circumferential direction between the bodies 10 and 20,

In the second embodiment of the present invention, the first body 10 is rotatably coupled to the rear end of the lever 30 in a locking structure, and the second body 20 has the piston 70 at its front end. Coupled with bolts, when the lever 30 rotates, the second body 20 moves forward and backward together with the piston 70 .

The tube (T) is fitted into the mounting hole (12), the outer tube (40) to which the liquid is injected and sprayed, the inner tube (50) is built into the outer tube (40) and a part of the injected liquid is recovered and discharged. ) is included.

The exterior 40 includes a liquid injection path 41 formed through the longitudinal direction, a liquid discharge hole 42 formed by opening one side of the front end, and an electrode 43 coupled to the front end. do.

The inner tube 50 is built into the injection passage 41 to form the liquid injection passage 41 between the exterior 40 and the liquid material recovery passage 51 formed through the passage in the longitudinal direction; , and an electrode wire 52 inserted into the recovery path 51 and connected to the electrode part 43 .

Accordingly, a portion of the liquid (eg, saline solution) injected into the injection path 41 of the exterior 40 is injected into the discharge hole 42 according to the injection pressure, and the remaining portion is the recovery path of the inner tube 50 . It is discharged to the outside of the catheter through (51) and recovered.

The electrode wire 52 has either + or - connected, and in a state where the + or - electrode is applied to the electrode part 43, a different pole from the electrode part 43 is applied to the electrode pad attached outside the body. , it enables monopolar high-frequency treatment to be performed.

However, the present invention is a technology applicable to all types of complex catheters that can inject liquids such as saline, and the catheter, endoscope, which can perform bipolar high-frequency treatment by connecting + and - 2 electrodes to the tube (T) Various technologies applied to the tube T, such as a catheter and a balloon catheter, may be variously changed.

The cylinder 60 guides the forward and backward movement of the piston 70 to change the volume of the first retention part 71 into which the liquid is injected, so that the injection amount of the liquid discharged from the tube T can be adjusted. as,

A first mounting hole 61 that is mounted on the mounting part 11 and into which the rear end of the exterior 40 is fitted, and a lead-out hole 62 that is connected to the rear of the first mounting hole 61 and has an open rear surface. ) is provided.

As described above, the cylinder 60 is fixedly mounted by being bolted to the first and second bodies 10 and 20 , and the first mounting hole 61 provided at the front end is provided with the withdrawal hole 62 . ) and form a kind of chamber together with the first retention part 71 of the piston 70 .

The piston 70 is fitted in the withdrawal hole 62 to move forward and backward, has a second mounting hole 73a into which the rear end of the inner tube 50 is fitted, and an inner wall portion 73 to which the liquid injection tube 82 is connected. ), a first retention part 71 that is connected to the liquid injection pipe 82 in front of the inner wall 73 and is formed with an open front, and is formed with a closed rear surface at the rear of the inner wall 73, A second retention part 72 to which the liquid discharge pipe 83 is connected is provided,

By moving the piston 70 forward and backward with the lever 30 to change the volume of the first retention part 71 , the injection amount of the liquid discharged from the tube T is adjusted.

The inner wall part 73 forms a first retention part 71 which is a kind of chamber in the inner space in front, and the second retention part 72 is spaced apart from the inner wall part 73 at the rear end side of the inner wall part 73 by a predetermined distance. ) forming a cap member 80 is coupled,

The liquid injection pipe 82 passes through the front portion of the cap member 80 and is inserted into the inner wall portion 73 and connected to the first retention portion 71, which is the inner space in front of the inner wall portion 73, and the The liquid discharge pipe 83 is inserted into the front portion of the cap member 80 and connected to the second retention portion 72, which is the inner space in front of the cap member 80, and the electrode wire 52 to be described later is the cap member ( 80) through the through hole 81 provided in the front part is connected to the medical device through the connector (C).

Accordingly, while the second retention portion 72 is blocked by the inner wall portion 73 and the front portion of the cap member 80 and has a constant volume, the first retention portion 71 has a withdrawal hole according to the forward/backward position of the piston 70 . There is a difference in that the volume connected to 62 is variable so that the injection pressure of the liquid is adjusted.

The injection pipe 82 and the discharge pipe 83 are pipe-shaped liquid pipes, and after the liquid pumped into the injection pipe 82 is filled in the first retention part 71, the tube T through the exterior 40 ) is sprayed to the outside, and the liquid recovered through the inner tube 50 passes through the second retention unit 72 and then is discharged and recovered through the discharge pipe 83 , so that the liquid material such as saline is circulated and discharged.

Therefore, the pump built into the medical device connected to the catheter pumps the liquid at a certain pressure and supplies it to the catheter.

When the operator moves the piston 70 backward to increase the volume of the first retention part 71 , the liquid before being introduced into the exterior 40 is decompressed while being stored on the first retention part 71 , and the tube (T) ) to reduce the amount of liquid that is finally discharged,

Conversely, when the operator advances the piston 70 and the volume of the first retention tube becomes small, the liquid before being introduced into the exterior 40 is pressurized in the first retention part 71 and finally discharged to the tube T The amount of liquid to be sprayed increases,

Regardless of the injection pressure of the liquid, the liquid recovered to the inner tube 50 is stored in the second retention unit 72 and discharged in a state adjusted to a predetermined pressure and returned to the medical device.

Therefore, in the present invention, the operator directly moves the piston 70 forward and backward with the lever 30 to vary the volume of the first retention part 71, so that the injection amount of the liquid discharged from the tube T can be adjusted. Therefore, it is possible to control the injection amount of the liquid more quickly and accurately compared to controlling the injection amount of the liquid through the pump control of the medical device itself like a conventional catheter.

The power transmission means converts the rotation of the lever 30 to the forward and backward movement of the piston 70,

The forward and backward movement of the piston 70 is induced using a screw groove (not shown) formed on the inner circumferential surface 31 of the lever 30 , but depending on the method in which the piston 70 is coupled to the screw groove of the lever 30 . It is divided into a first embodiment and a second embodiment.

First, the first embodiment of the present invention is a fin-type forward and backward structure,

A screw groove formed in the inner circumferential surface 31 of the lever 30;

A first guide groove 63 passing through one side of the cylinder 60 and having a predetermined length in front and back;

and a driving pin 74 that is coupled to protrude from one side of the piston 70 , is slidably coupled to the first guide groove 63 , and has an outer end fitted into the screw groove of the lever 30 .

The screw groove is formed over the entire inner peripheral surface 31 of the lever 30 in front and back,

The first guide groove 63 is formed to have a predetermined length in consideration of the maximum forward/backward distance of the piston 70 .

The inner end of the driving pin 74 is screwed to one side of the piston 70 , and the other end of the driving pin 74 passes through the first guide groove 63 and is fitted into the screw groove of the lever 30 .

Accordingly, when the operator grasps and turns the lever 30, the driving pin 74 moves along the screw groove of the lever 30. Since the driving pin 74 is constrained by the first guide groove 63, the lever ( 30) is converted into a linear motion of the piston 70, and as the piston 70 moves forward and backward, the volume of the first retention part 71 is changed.

Next, the second embodiment of the present invention is a screw-type forward and backward structure,

A screw groove formed in the inner circumferential surface 31 of the lever 30;

It is formed on the outer peripheral surface 75 of the piston 70 and includes a screw thread (not shown) engaged with the screw groove.

The screw thread protrudes in the longitudinal direction from both sides of the piston 70 and is provided to be exposed to the outside of the body M as a space between the bodies 10 and 20, and is provided on the inner circumferential surface 31 of the lever 30. screwed together

At this time, the lever 30 is coupled to the rear end of the first body 10 in a locking structure so that it cannot be moved forward or backward. Due to the meshing structure, as the piston 70 moves forward and backward together with the bolted second body 20 , the volume of the first retention part 71 changes.

Subsequently, the main body (M) and the cylinder (60) include second guide grooves (13, 75) formed to have a predetermined length in the front and back through one side of the position corresponding to each other,

The piston 70 is coupled to protrude from one side and includes an identification pin 76 that is slidably coupled to the second guide grooves 13 and 75 to identify the front and rear positions of the piston 70 .

Although the drawings of the present specification show that the second guide grooves 13 and 75 and the identification pin 76 are provided only in the second embodiment, the second guide grooves 13 and 75 and the second guide grooves 13 and 75 are also provided in the first embodiment. An identification pin 76 may be applied.

The second guide grooves 13 and 75 are provided to correspond to the first guide grooves 63 at a position out of the lever 30 , and the identification pin 76 is formed on the outer peripheral surface of the piston 70 ( 75) and is positioned in the second guide grooves 13 and 75.

Accordingly, when the piston 70 moves forward and backward with the lever 30, the identification pin 76 moves forward and backward along the second guide grooves 13 and 75 in accordance with this, and the operator moves the identification pin 76 forward and backward. You can intuitively know the current injection pressure (injection amount) of the liquid by directly checking the

In addition, although not shown in the drawing, when a scale at a predetermined interval is displayed on the left and right sides of the outer surface of the second guide groove 13, the position of the identification pin 76 can be more accurately confirmed based on the scale, so that the injection amount of the liquid is controlled can be done more accurately.

In addition, the electrode part 43 is spaced apart from the front ends of the outer tube 40 and the inner tube 50 by a predetermined distance to be fitted and coupled, so that the recovery space 44A between the outer tube 40 and the inner tube 50 is removed. It further includes a cannula 44 that allows it to form.

The insertion tube 44 is radially arranged and provided with discharge holes 44a connected to the injection path 41, and the inner tube 50 is inserted and fitted in the center of the discharge holes 44a,

The electrode part 43 and the front end of the exterior 40 are completely inserted and coupled to the inside so as to be spaced apart by a predetermined distance, and at this time, the insertion tube 44 is inserted and coupled only to the front end of the discharge hole 42 .

In this way, when the insertion tube 40 is inserted into the exterior 40 to reduce the cross-sectional area of the injection passage 41, a portion of the liquid flowing into the injection passage 41 enters the insertion tube 40 before entering the discharge hole ( 42), the remaining part of the liquid flows out through the discharge hole 44a, is stored in the recovery space 44A, and then flows into the recovery path 51 of the inner tube 50 to be recovered.

At this time, the electrode wire 52 extends from the inner tube 50 by the spaced width of the recovery space 44A and is connected to the electrode part 43. For convenience of understanding, in FIGS. 1 and 2, the electrode wire 52 ) is shown before the electrode part 43 is connected.

On the other hand, the piston 70 is provided with a ring mounting groove (G) on the outer circumferential surface for airtightness, and an O-ring is inserted to maintain airtightness between the piston 70 and the cylinder 60. When the piston 70 moves forward and backward, the O-ring is pushed and damaged A decrease in airtightness may occur.

Accordingly, the present invention made it possible to easily mount the quad ring (R) while increasing airtightness with a quad ring (R) as shown in FIG. 5 instead of an O-ring of a general circular cross section.

Specifically, the outer peripheral surface 75 of the piston 70 is provided with a ring mounting groove (G), powder (reference numeral not shown) corresponding to the outer diameter of the piston 70 is assembled to the piston 70, the ring mounting groove (G) to form,

It is fitted in the ring mounting groove (G) and includes a quad ring (R) having a lip portion (R1) formed by protruding an arc-shaped corner of a square cross section,

The quad ring (R) includes a fitting hole (R2) formed in the longitudinal direction at the center of the lip parts (R1), and an insertion groove (R3) formed by opening to one side of the fitting hole (R2),

A circular elastic ring part (E1) that is in close contact with the inner circumferential surface of the fitting hole (R2), a connection part (E2) connected to intersect in an 'X' shape at both ends of the elastic ring part E1 to fit into the insertion groove (R3) , Including an elastic deformable member (E) consisting of a pressing portion (E4) connected to protrude from the outer end of the connecting portion (E2) than the lip portion (R1),

When the quad ring (R) is inserted into the ring mounting groove (G) and the powder is assembled to the piston (70), one inner surface of the ring mounting groove (G) presses the pressing part (E4) while the elastic ring part (E1) is spread, each lip portion (R1) is characterized in that close to the edge of the ring mounting groove (G).

The quad ring (R) is a flexible material such as rubber or silicone, and the outer surface of the concave part between the lip parts R1 on one side is cut with the insertion groove R3, so that the lip part R1 is centered on the fitting hole R2. ) can happen.

In the quad ring (R), a plurality of the insertion grooves (R3) are spaced apart from each other by a predetermined distance along the fitting hole (R2), and the inner diameter of the quad ring (R) is greater than the outer diameter of the ring mounting groove (G). While large, the upper and lower width of the quad ring (R) is formed smaller than the depth of the ring mounting groove (G).

The elastic deformable member (E) is mounted with an elastic ring portion (E1) having a circular ring shape corresponding to the quad ring (R) is fitted into the fitting hole (R2) in the form of a pipe, and at this time, along the elastic ring portion (E1) The connecting portion E2 and the pressing portion E4 are connected to be arranged to be spaced apart from each other by a predetermined interval.

In addition, the connection part (E2) and the pressing part (E4) are connected by an extension part (E3) formed longer than the distance between the inner peripheral surface of the fitting hole (R2) and the outer peripheral surface of the lip part (R1), the elastic deformable member (E) When mounted on the fitting hole (R2) of the quad ring (R), the pressing portion (E4) exposed to the insertion groove (R3) protrudes more than the outer surface of the lip portion (R1).

Therefore, when the assembly of the quad ring (R) and the elastic deformation member (E) is inserted into the ring mounting groove (G) before the powder assembly and the powder is assembled to the piston (70), the quad ring (R) of the ring mounting groove (G) is inserted. ) is pressed to the rear of the piston 70, the pressing portion E4 protruding from the one side (rear side) lip portions R1 is pressed against the inner surface of one side of the ring mounting groove (G).

When the pressing part (E4) is pressed in this way, the connecting part (E2) crossed in an 'X' shape spreads the elastic ring part E1, and when the elastic ring part E1 opens and the diameter expands, the quadring (R) based on the cross section ), the lip parts R1 expand as they spread, and when the piston 70 is assembled into the cylinder 60, the lip parts R1 of the quad ring R are in close contact with the corners of the ring mounting groove G to ensure airtightness. this is increased

At this time, if the O-ring of a general circular cross section is forcibly spread and fitted into the ring mounting groove (G), a decrease in elasticity may occur. Since the quad ring (R) can be installed by inserting it without spreading the quad ring (R), the quad ring (R) can be easily fitted without lowering the elasticity of the quad ring (R).

When the piston 70 is assembled to the cylinder 60 in a state in which the quad ring R is mounted, the lip portions R1 of the quad ring R, which is widened by the elastic deformation member E, are formed in the ring mounting groove G ) in close contact with the edge (that is, the bottom surface of the ring mounting groove and the inner circumferential surface of the sealer) to provide an airtight improvement effect using the quad ring (R).

In the above description of the present invention, with reference to the accompanying drawings, the present invention has been mainly described with reference to the accompanying drawings, but various modifications, changes and substitutions are possible by those skilled in the art, and these modifications, changes and substitutions fall within the protection scope of the present invention. should be interpreted as

M : body T : tube
10, 20: body 30: lever
40: exterior 50: interior
60: cylinder 70: piston
80: cap member

Claims (4)

a body having an inner mounting portion and a front mounting hole, and including a lever rotating in a circumferential direction;
Doedoe fitted into the mounting hole, a tube including an outer tube into which a liquid is injected and sprayed, and an inner tube that is built into the outer surface and a part of the injected liquid is recovered and discharged;
a cylinder mounted on the mounting unit and having a first mounting hole into which the rear end of the exterior is fitted, and a lead-out hole connected to the rear of the first mounting hole and having an open rear surface;
A first wall portion fitted in the withdrawal hole to move forward and backward, having a second mounting hole through which the rear end of the inner tube is fitted, and to which a liquid injection tube is connected, and connected to the liquid injection tube from the front of the first wall portion and has a front side a piston for adjusting the flow rate having a first retention part opened and formed, a second retention part having a closed rear surface at the rear of the first wall part and connected to a liquid discharge pipe; and
Including; power transmitting means for converting the rotation of the lever to the forward and backward of the piston;
Composite catheter, characterized in that by changing the volume of the first retention portion by moving the piston forward and backward with the lever, it is possible to adjust the injection amount of the liquid discharged from the tube.
The method of claim 1,
The power transmission means,
a screw groove formed on the inner circumferential surface of the lever;
a first guide groove formed to have a predetermined length forward and backward through one side of the cylinder;
Composite catheter, characterized in that it is coupled to protrude from one side of the piston and is slidably coupled to the first guide groove and comprises a driving pin having an outer end fitted into the screw groove of the lever.

The method of claim 1,
The power transmission means,
a screw groove formed on the inner circumferential surface of the lever;
Composite catheter, characterized in that it is formed on the outer circumferential surface of the piston and comprises a screw thread engaged with the screw groove.
4. The method according to any one of claims 1 to 3,
The body and the cylinder include a second guide groove formed to have a predetermined length in the front and back through one side of the position corresponding to each other,
The piston is coupled to protrude from one side and is slidably coupled to the second guide groove, composite catheter, characterized in that it comprises an identification pin for identifying the front and rear positions of the piston.

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