Medical dispensing device allowing combinational use of multiple treatment tools

Abstract

A medical dispensing device of the present invention comprises: a body provided with at least one operation handle; a first guide for transferring a tensile force of the operation handle, and a first treatment tool connected to the end of the first guide; a second guide for transferring a tensile force of the operation handle, and a second treatment tool connected to the end of the second guide; a tube part having double lumens for guiding the first treatment tool and the second treatment tool into the body and a single lumen forming a distal part, the double lumens including a first lumen into which the first guide is inserted and a second lumen into which the second guide is inserted, the first treatment tool and the second treatment tool intersecting each other at the distal part to enable one of the first treatment tool and the second treatment tool to be discharged; a double hole bushing provided to the single lumen and limiting the maximum advancing distance or the maximum retracting distance of the first treatment tool or the second treatment tool; and a single hole bushing provided to the double lumen and limiting the maximum retraction distance of the first treatment tool or the second treatment tool.

Description

Medical discharge device with multiple treatment devices

[0001] The present invention relates to a medical discharge device used in procedures such as endoscopy, and relates to a medical discharge device in which two types of treatment tools are used together and the operating characteristics during discharge are improved.

[0002] The field of therapeutic endoscopy is a crucial area in the treatment of the digestive system. This field has been evolving thanks to the advent of ultra-small solid-state imaging devices (CCDs: Charge-Coupled Devices), the miniaturization of electronic components, advancements in imaging technology, advancements in therapeutic techniques, and the increasing proficiency of physicians.

[0003] Traditionally, treatment for gastric or colon cancer relied on surgical methods. However, the advent of endoscopic procedures has made minimally invasive surgery possible. Endoscopic surgical procedures include endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD). These endoscopic procedures utilize a variety of instruments, depending on the purpose of the procedure—marking, incision, dissection, hemostasis, or drainage—and the type of mucosa involved. These instruments are manipulated via medical discharge devices and inserted into the endoscope's working channel for use during the procedure. Depending on the task, such as marking, incision, or hemostasis, instruments need to be replaced during the procedure. Previously, each instrument was controlled by a single medical discharge device. Therefore, when instrument replacement was necessary, the existing instrument had to be removed and a new one inserted into the endoscope's working channel, resulting in the inconvenience of this procedure.

[0004] Endoscopes have a limited number of working channels, limiting the number of instruments that can be inserted into them. In various endoscopic procedures requiring marking, incision, dissection, hemostasis, and washing, providing medical devices that allow for a variety of procedures using multiple instruments without having to replace the endoscope channel offers numerous advantages. For example, a high-frequency knife is a tool that marks or resects the mucosa using high-frequency waves. When the high-frequency knife is in operation, the needles for delivering fluid, hemostasis, saline solution, and medications can be immediately controlled to enable rapid follow-up procedures. This improves convenience, speed, and overall outcome.

[0005] However, it is not easy to provide a medical discharge device that can be used for two different treatment devices. Fig. 1 shows a medical discharge device that can be used for two different treatment devices, disclosed in the applicant's prior application patent application number 10-2023-0003978 (hereinafter referred to as the "prior application patent"). The above-mentioned prior application patent discloses a means for resolving malfunction problems such as needle detachment, tube breakage, or tube rotation when independently controlling multiple treatment devices with a single handle.

[0006] However, a medical discharge device that uses two types of treatment tools simultaneously may have an additional technical issue in which a defect occurs in the discharge operation of one of the treatment tools. For example, when one treatment tool, the first treatment tool, is discharged, the other treatment tool, the second treatment tool, may be pushed back even though it is not in an operating state. The present applicant has discovered a phenomenon in which the second treatment tool is slightly pushed back from a designated position when the first treatment tool is moved forward even though the second treatment tool is mechanically locked at the operating handle end. The present applicant has confirmed a problem in which a malfunction occurs in which the second treatment tool is not sufficiently discharged during a cross-operation to retract the first treatment tool and advance the second treatment tool due to this phenomenon. Hereinafter, the phenomenon in which the treatment tool is pushed back due to the reaction force of the system even though it is locked and not being operated is called a backflash phenomenon.

[0007] Figure 2 illustrates a medical ejection device with an improved driving length of the device to address the aforementioned backflash phenomenon. Figure 2 (a) illustrates a conventional medical ejection device in which a handle stroke having a length of S1 is formed. Figure 2 (b) illustrates an example of a medical ejection device with an improved driving length in which a handle stroke having a length of S2 is formed.

[0008] FIG. 3 is an example showing that even if the stroke is improved as in FIG. 2, malfunctions may still occur. FIG. 3 (a) shows the state before the operation of the medical discharge device, in which the needle is positioned at the designated standby position (P1). FIG. 3 (b) shows the state in which the high-frequency knife, which is the first treatment tool (10), is discharged, and the needle, which is the second treatment tool, is retracted (P2) from the designated standby position (P1), resulting in a backflash phenomenon. In the state of FIG. 3 (b), if the stroke is improved to be longer in the form of FIG. 2 (b) and the discharge operation is performed, a malfunction resulting in tube breakage may occur. FIG. 3 (c) shows an example in which the side of the tube is damaged when the needle is discharged by cross-driving. This is because the needle enters the side of the bended tube as it advances as it is pushed back from the designated position.

[0009] Referring to Figure 3, it can be seen that the backflash phenomenon, which causes the needle to retreat further than the designated position, causes not only a problem with the discharge distance but also an additional problem that can damage the side of the curved distal end of the tube.

[0010] In summary, unexpected malfunctions can occur when multiple treatment tools intersect and discharge from a single tube. In particular, backflash can occur even when one treatment tool is locked to prevent retraction. Backflash can occur due to factors such as the tension in the flexible tube during the advancement of another treatment tool, the degree of tube bending, and backlash in the main unit's operating section.

[0011] Furthermore, malfunctions can be caused by the medical practitioner's usage. If the medical practitioner incorrectly pulls the tube from the endoscope or pulls it with excessive force, the tube can stretch. This stretching can cause the bushing, which is installed to prevent needle dislodgement, to become misaligned, potentially leading to serious problems such as the needle breaking the tube when the distal end is bent. This not only compromises the safety of the procedure, but also carries the risk of complications such as secondary infection or tissue damage if the tube breaks inside the patient's body. Therefore, a tube structure that prevents the tube of a medical discharge device from stretching even under excessive tension and maintains the bushing's position to prevent needle-induced tube breakage must be considered. Related literature includes Korean Patent Application No. 10-2023-0003978 and Korean Patent Publication No. 10-2022-0014413.

[0012]

[0013] The present invention provides a medical discharge device having improved operating characteristics, which comprises a handpiece configured to control a plurality of treatment instruments through a single discharge device.

[0014] The present invention is a medical discharge device applicable to all different types of high-frequency knives in which needles can be used simultaneously, and aims to provide a medical discharge device in which no malfunction problems such as needle detachment, tube breakage, or tube rotation occur in each lumen structure of an IT type (Insulation Type) in which a high-frequency tip is exposed from a lumen and a Ball type in which a high-frequency tip is accommodated inside a lumen.

[0015] The present invention aims to provide a medical discharge device that can prevent tube breakage by a needle by forming a two-lumen structure while increasing the inner thickness of the tube, thereby preventing the tube from stretching and fixing the position of the bushing even when a medical practitioner pulls the tube excessively.

[0016] The present invention is characterized in that it comprises a main body provided with one or more operating handles; a first guide for transmitting a tensile force of the operating handle, and a first treatment tool connected to a distal end of the first guide; a second guide for transmitting a tensile force of the operating handle, and a second treatment tool connected to a distal end of the second guide; a tube part for guiding the first treatment tool and the second treatment tool into the body, the tube part having a double lumen in which a first lumen through which the first guide penetrates and a second lumen through which the second guide penetrates are formed, and a single lumen in which the first treatment tool and the second treatment tool intersect to form a distal end through which one of the treatment tools is discharged; a double hole bushing provided in the single lumen and limiting a maximum forward distance or a maximum retracted distance of the first treatment tool or the second treatment tool; and a single hole bushing provided in the double lumen and limiting a maximum retracted distance of the first treatment tool or the second treatment tool.

[0017] In one embodiment, the first treatment tool and the second treatment tool have a standby position for being discharged in a non-actuated state of the operating handle, which is an inner space of the single lumen, and the single hole bushing can prevent the other treatment tool from being dislodged from the standby position and retracted when one treatment tool is discharged from the single lumen by actuation of the operating handle.

[0018] In one embodiment, the double hole bushing forms a boundary between the double lumen and the single lumen, and when the first treatment tool and the first guide are connected in the area of ​​the single lumen, the second treatment tool and the second guide are connected in the area of ​​the double lumen, so that the connected positions of the treatment tool and the guide are different with the double hole bushing as the boundary, and thus the first guide can be inserted into the first hole of the double hole bushing, and the second treatment tool can be inserted into the second hole of the double hole bushing.

[0019] In one embodiment, the double hole bushing may limit the maximum forward distance of the second treatment tool and limit the maximum retractable distance of the first treatment tool.

[0020] In one embodiment, the single hole bushing may limit the maximum retraction distance of the second treatment tool.

[0021] In one embodiment, the first instrument may be a high-frequency knife, the first guide may be a conductive wire, the second instrument may be a needle, and the second guide may be a needle tube.

[0022] In one embodiment, the double hole bushing may be formed such that the inner diameter of the first hole is smaller than the outer diameter of the rear end of the first treatment tool, and the inner diameter of the second hole may be formed smaller than the outer diameter of the extended end of the second guide as the rear end of the second treatment tool is inserted and connected to the second guide.

[0023] In one embodiment, the single hole bushing may be provided inserted into the second lumen.

[0024] In one embodiment, the single hole bushing may be formed with an inner diameter hole through which the second guide passes, and the inner diameter of the hole may be formed smaller than the outer diameter of the extended end of the second guide as the rear end of the second treatment tool is inserted into the second guide.

[0025] In one embodiment, the single hole bushing may be inserted into one of the two lumens of the double lumen, and may be provided in a tapering shape in which the outer diameter of the rear end expands based on the direction in which it is inserted, so that it can be fitted and fixed.

[0026] In addition, the present invention relates to a medical discharge device in which a plurality of treatment tools are used in combination, comprising: a main body provided with at least one operating handle; a first guide for transmitting a tensile force of the operating handle, and a first treatment tool connected to a distal end of the first guide; a second guide for transmitting a tensile force of the operating handle, and a second treatment tool connected to a distal end of the second guide; a double lumen for guiding the first treatment tool and the second treatment tool into the body, the double lumen having a first lumen into which the first guide penetrates and a second lumen into which the second guide penetrates; a first single-hole bushing provided in the second lumen, when the operating handle is not driven, such that the first treatment tool has a standby position for driving formed on the outside of the double lumen exposed from the first lumen, and the second treatment tool has a standby position for discharge formed on the inside of the double lumen, which is the inside of the second lumen, and which limits a maximum forward distance of the second treatment tool; and a second single hole bushing provided in the second lumen to limit the maximum retraction distance of the second treatment tool.

[0027] In one embodiment, the first single hole bushing may have a hole formed with an inner diameter smaller than the outer diameter of the second guide, thereby limiting the maximum forward distance of the second treatment tool by engaging the second guide.

[0028] In one embodiment, the second single hole bushing may be formed with an inner diameter hole through which the second guide passes, and the inner diameter of the hole may be formed to be smaller than the outer diameter of the extended end of the second guide as the rear end of the second treatment tool is inserted into the second guide.

[0029] In one embodiment, the tube portion may be formed by forming a single lumen by groove-processing the distal portion of the tube in which the double lumen is formed, so that the tube wall thickness of the distal portion may be formed to be 0.4 mm to 0.65 mm.

[0030] In one embodiment, the medical discharge device may further include a hub connector having a rear end coupled to a hub formed in the main body and a front end fitted with the tube portion, and through which the first treatment tool and the second treatment tool pass and are guided to the main body.

[0031] According to the present invention, the operating characteristics of a medical discharge device configured to be configured to selectively control a plurality of treatment tools by combining the main body of a handpiece can be improved. The present invention can be applied to both a Ball Type discharge device with a multi-lumen structure consisting of a single lumen and a double lumen, and an IT Type (Insulation Type) discharge device consisting only of a double lumen, and can prevent a backflash phenomenon in which one of the treatment tools is pushed back due to the reaction force of the system.

[0032] More specifically, according to the present invention, when controlling a plurality of treatment instruments through a single discharge mechanism, problems of malfunction such as detachment of the treatment instrument, breakage of the tube, or rotation of the tube are resolved, thereby improving convenience, speed, and accuracy of endoscopic procedures for medical personnel.

[0033] Furthermore, the present invention increases the inner thickness of the distal portion of the tube and forms a two-lumen structure, thereby preventing the tube from stretching even when the medical practitioner pulls excessively on it, thereby maintaining the bushing's position in a fixed state. This fundamentally prevents tube breakage caused by the needle when the distal portion is banded. The present invention eliminates the risk of tube breakage caused by the needle while improving the convenience and safety of the procedure, thereby ensuring both the efficiency of the procedure for medical professionals and the safety of patients.

[0034] Figure 1 shows a medical discharge device that combines two types of conventional treatment devices.

[0035] Fig. 2 (a) shows a conventional medical discharge device according to Fig. 1, and Fig. 2 (b) shows a medical discharge device with an improved handle driving length.

[0036] FIG. 3 (a) shows a state before operation of a conventional medical discharge device according to FIG. 1, in which a needle is positioned at a designated standby position (P1), FIG. 3 (b) shows an operating state in which a high-frequency knife, which is a first treatment tool, is discharged in the conventional medical discharge device according to FIG. 1, in which a needle, which is a second treatment tool, is retracted (P2) from the designated standby position (P1), resulting in a backflash phenomenon, and FIG. 3 (c) shows a case in which the side of a tube is damaged when a needle is discharged by cross-driving in the conventional medical discharge device according to FIG. 2.

[0037] Figure 4 illustrates a medical discharge device according to an embodiment of the present invention.

[0038] Fig. 5 (a) shows that the tube portion according to an embodiment of the present invention is formed into a multi-lumen structure, and Fig. 5 (b) shows the transparency of the tube portion.

[0039] Fig. 6 (a) shows a double hole bushing according to an embodiment of the present invention, and Fig. 6 (b) is an exploded perspective view of a tube portion to which the double hole bushing is fastened.

[0040] Fig. 7 (a) shows a single hole bushing according to an embodiment of the present invention, and Fig. 7 (b) is a transparency of a tube portion to which the single hole bushing is fastened.

[0041] Figure 8 is an exploded view of a double lumen medical discharge device according to another embodiment of the present invention.

[0042] Fig. 9 shows a hub configured in a main body according to an embodiment of the present invention.

[0043] Fig. 10 illustrates a hub connector according to an embodiment of the present invention.

[0044] Figure 11 shows an exploded cross-sectional view of a main body according to an embodiment of the present invention.

[0045] Fig. 12 shows a tube section according to another embodiment of the present invention.

[0046] The various embodiments described in this document are exemplified for the purpose of clearly explaining the technical concepts of the present invention and disclosure, and are not intended to limit them to specific embodiments. The technical concepts of the present invention and disclosure include various modifications, equivalents, alternatives, and embodiments selectively combined from all or part of the embodiments described in this document. Furthermore, the scope of the technical concepts of the present invention and disclosure is not limited to the embodiments presented below or the specific descriptions thereof.

[0047] Terms used in this document, including technical or scientific terms, unless otherwise defined, may have the meaning commonly understood by one of ordinary skill in the art to which the present invention and disclosure pertain.

[0048] The expressions "includes," "may include," "comprises," "may have," "have," and "may have" used in this document imply the presence of a function, operation, or component as the target feature, and do not exclude the presence of other additional features. In other words, such expressions should be understood as open-ended terms that imply the possibility of including other embodiments.

[0049] The singular forms used in this document may include the plural form unless the context clearly indicates otherwise, and this also applies to the singular forms set forth in the claims.

[0050] As used herein, the expressions "A, B, and C," "A, B, or C," "A, B, and / or C," or "at least one of A, B, and C," "at least one of A, B, or C," "at least one of A, B, and / or C," "at least one selected from A, B, and C," "at least one selected from A, B, or C," "at least one selected from A, B, and / or C," and the like can mean each of the listed items or all possible combinations of the listed items. For example, "at least one selected from A and B" can refer to (1) A, (2) at least one of A, (3) B, (4) at least one of B, (5) at least one of A and at least one of B, (6) at least one of A and B, (7) at least one of B and A, and (8) both A and B.

[0051] The expression "based on" as used in this document is used to describe one or more factors that influence the decision, act of judgment, or action described in the phrase or sentence containing the expression, and this expression does not exclude additional factors that influence the decision, act of judgment, or action.

[0052] As used herein, the expression that a component (e.g., a first component) is “connected” or “connected” to another component (e.g., a second component) may mean that the component is directly connected or connected to the other component, as well as connected or connected via a new other component (e.g., a third component).

[0053] The expression "configured to" used in this document can have the meanings of "set to do", "having the ability to do", "changed to do", "made to do", and "able to do" depending on the context, and is distinct from the meaning of "consist".

[0054] Hereinafter, various embodiments of the present disclosure will be described with reference to the attached drawings. In the attached drawings and the description of the drawings, identical or substantially equivalent components may be assigned the same reference numerals. Furthermore, in the description of various embodiments below, duplicate descriptions of identical or corresponding components may be omitted, but this does not mean that the corresponding components are not included in the embodiments.

[0055] Fig. 4 shows a medical discharge device (1) according to an embodiment of the present invention.

[0056] Referring to FIG. 4, the medical discharge device (1) may be configured to include a first treatment tool (10) and a second treatment tool (30) that have different operating characteristics. The medical discharge device (1) may be provided with an operating module (70) and an operating handle (50) on the main body (2) of the handpiece. The operating handle (50) may be an operating means for discharging or retracting the first treatment tool (10) and the second treatment tool (30). In the present embodiment, after locking one of the treatment tools through the operating module (70), the unlocked treatment tool may be driven by the operating handle (50). That is, the medical discharge device (1) according to the present embodiment may be provided so as to control two treatment tools with a single operating means.

[0057] The main body (2) may be configured with a slider (S2) that defines the driving distance of the treatment tool. The operating handle (50) may be advanced or retracted by the length of the slider (S2). The length of the slider (S2) may determine the hand stroke. The driving distance of the slider (S2) may be formed to a length suitable for discharging each treatment tool.

[0058] In the embodiment of Fig. 4, a medical discharge device (1) is exemplified in which an ESD knife (10) and a needle (30) are used in combination as multiple treatment tools. The types of treatment tools may be combined in various ways depending on the type of procedure. However, since a treatment tool with a sharp end, such as a needle (30), may directly damage the tube in the event of malfunction, this embodiment will be described with a case in which a needle (30) is used in combination among multiple treatment tools as an example.

[0059] The first treatment tool (10) and the second treatment tool (30) are connected to the first guide (100) and the second guide (300), respectively. The first guide (100) and the second guide (300) are each connected to a cylinder inside the main body (2), and the cylinder can be slidably driven by a slider (S2). The cylinder of the first treatment tool (10) and the cylinder of the second treatment tool (30) can be provided with a connecting means to which an external additional member is connected, depending on the characteristics of the treatment tools. The connecting means of the first treatment tool (10) can be a first connecting portion (80), and the connecting means of the second treatment tool (30) can be a second connecting portion (90). In the present embodiment, when the first treatment tool (10) is an ESD knife, the first connecting portion (80) can be a power connector including a power input terminal. If the second treatment device (30) is a needle, the second connecting part (90) can be a fluid injection port through which a medicine or the like is injected.

[0060] The main body (2) may be configured with a hub (22) in the shear direction and a tube portion (20) may be connected thereto. In one embodiment, the tube portion (20) may include a protective tube (21), an outer tube (200), and an inner tube. The inner tube may include a single lumen (202, FIG. 5) or a double lumen (201, FIG. 5), and may be a multi-lumen tube in which two types of lumen tubes are used in combination. Hereinafter, for the convenience of explanation, a region of a tube in which two lumens are formed is referred to as a double lumen, and a region of a tube in which one lumen is formed is referred to as a single lumen. In addition, from the perspective of the tube portion (20), a tube configured to be a single lumen in one section and change to a double lumen in another section by using a single lumen and a double lumen in combination is defined as a multi-lumen tube.

[0061] The type of lumen constituting the tube portion (20) may vary depending on the type of the medical discharge device (1). The types of the medical discharge device (1) include Insulation Ball Type, Insulation Crescent Type, Ball Type, Hook Type, etc. The medical discharge device (1) is configured in various types according to the purpose of use and treatment function, and in the following embodiments, the Ball Type (hereinafter B-type) and the Insulation Ball Type (hereinafter IT-type) are representatively described. In the B-type medical discharge device (Figs. 4 to 7), the tube portion (20) is configured as a multi-lumen tube, and in the IT-type medical discharge device (Fig. 8), the tube portion (20) is configured as a double lumen, so that it may be configured as a single lumen tube rather than a multi-lumen tube.

[0062] Referring to Fig. 4, the tip bushing (60) constitutes a discharge tip from which the first treatment tool (10) and the second treatment tool (30) are discharged. The medical discharge device (1) according to the present embodiment may further include a double-hole bushing (61) and a single-hole bushing (62) in addition to the tip bushing (60) in the tube portion (20). The bushing according to the present embodiment can prevent the backflash phenomenon of any of the treatment tools mentioned in the background art.

[0063] The main body (2) may be provided with one or more operating handles (50). The main body (2) according to the present embodiment can control both the first treatment tool (10) and the second treatment tool (30) with one operating handle (50). This is because the operating module (70) according to the present embodiment locks and fixes one of the first treatment tool (10) and the second treatment tool (30), and the unlocked treatment tool can be slidably driven along the operating handle (50). In the drawings below, an embodiment in which one handle drives both treatment tools with the configuration of the operating module (70) will be described, but the present invention is not limited thereto, and two handles for operating the first treatment tool (10) and the second treatment tool (30) may be used together on the main body (2).

[0064] The first guide (100) can transmit the tensile force of the operating handle (50) to the first treatment tool (10). The first treatment tool (10) can be connected to the end of the first guide (100). In the present embodiment, the first treatment tool (10) can be a high-frequency knife (ESD knife), and the first guide (100) can be a conductive wire.

[0065] The second guide (300) can transmit the tensile force of the operating handle (50) to the second treatment tool (30). The second treatment tool (30) can be connected to the end of the second guide (300). In the present embodiment, the second treatment tool (30) can be a needle, and the second guide (300) can be a needle tube.

[0066] The tube part (20) can guide the first treatment tool (10) and the second treatment tool (30) into the body during the procedure. A tip bushing (60) is coupled to the end of the tube part (20), and the tip bushing (60) can limit the maximum advancement distance of the first treatment tool (10). In the case of the IT type, the tip bushing (60) is accommodated so that the treatment tool is exposed to the outside of the tip bushing (60) due to the characteristic of the end of the high-frequency knife having an insulating layer coated thereon. In this case, the tip bushing (60) functions to limit the maximum retreat distance of the high-frequency electrode of the IT type. On the other hand, in the embodiment of FIG. 4, a B-type high-frequency electrode is illustrated as the first treatment tool (10), and since the B-type high-frequency electrode is accommodated inside the tip bushing (60), there is a difference in that the maximum advancement distance is limited.

[0067] In the embodiment of Fig. 4, the tube portion (20) is formed with a structure in which the inner side of the tip bushing (60) is a single lumen. On the other hand, if the high-frequency electrode is an IT type, the tube portion (20) may be formed with a structure in which the inner side is a double lumen, and this will be described later with reference to Fig. 8.

[0068] Figure 5 (a) shows that the tube portion (20) according to an embodiment of the present invention is formed with a multi-lumen structure, and Figure 5 (b) shows the transparency of the tube portion (20). The tube portion (20) may include a double lumen (201) and a single lumen (202).

[0069] Referring to Fig. 5(a), the tube portion (20) is provided so as to be divided into a single lumen (202) region and a double lumen (201) region at the distal end. The single lumen (202) and the double lumen (201) can be viewed as inner tubes, and can be respectively inserted into the outer tube (200) to form the tube portion (20). The formation of a multi-lumen structure can also be formed by penetrating the double lumen (201) into the single lumen (202). In this case, the tube of the single lumen (202) will have a longer length than the tube of the double lumen (201) into which it is penetrating. The region of the single lumen (202) covering the end of the double lumen (201) becomes the front end, and the region of the single lumen can be naturally formed for the remaining length after the tube of the double lumen (201) is penetrated.

[0070] A single lumen (202) can form a waiting space in which a first treatment device (10) and a second treatment device (30) intersect on a single lumen to discharge either treatment device. This can form the distal portion of the tube portion (20).

[0071] Referring to FIG. 5(b), the first treatment tool (10) and the second treatment tool (30) can be formed in a standby position in the inner space of the single lumen (202) for discharge in a non-actuated state of the operating handle (50).

[0072] The double hole bushing (61) is provided in the single lumen (202) and can limit the maximum forward or backward distance of the first treatment tool (10) or the second treatment tool (30). In addition, the double hole bushing (61) can form a boundary between the double lumen (201) and the single lumen (202). Due to the boundary formed by the double hole bushing (61), the first treatment tool (10) and the first guide (100) can be connected in the area of ​​the single lumen (202), while the second treatment tool (30) and the second guide (300) can be connected in the area of ​​the double lumen (201).

[0073] Fig. 6 (a) shows a double hole bushing (61) according to an embodiment of the present invention, and Fig. 6 (b) is an exploded perspective view of a tube portion (20) to which the double hole bushing (61) is fastened. As shown in Fig. 5, since the connecting positions of the treatment tool and the guide are different with the double hole bushing (61) as the boundary, a first guide (100) can be inserted into the first hole (611) of the double hole bushing (61), and a second treatment tool (30) can be inserted into the second hole (612) of the double hole bushing (61).

[0074] The double hole bushing (61) may be formed so that the inner diameter of the first hole (611) is smaller than the outer diameter of the rear end of the first treatment tool (10). The inner diameter of the second hole (612) may be formed so that it is smaller than the outer diameter of the end (301) of the second guide (300). The inner diameter of the second hole (612) may be formed so as to be smaller than the outer diameter of the expanded end (301) of the needle tube (300) or the outer diameter of the needle tube (300). The needle (30) is connected to the connector (33), and the connector (33) is fitted to the needle tube (300). Typically, the end of the needle tube (300) is formed so that the end (301) is larger than the outer diameter of the needle tube (300) after the tube is expanded by heat treatment or the like, and then the connector (33) is fitted and pressed. Since the second guide (300) is located on the right side (based on FIG. 5) with respect to the double hole bushing (61), the maximum forward distance of the second treatment tool (30) may be limited when the end (301) is caught on the second hole (612).

[0075] The double hole bushing (61) is connected to the first treatment tool (10) by having the first guide (100) pass through the first hole (611) to the left (based on FIG. 5), so that the rear outer diameter of the first treatment tool (10) is caught by the first hole (611) in the shear direction of the tube. Accordingly, the first hole (611) can limit the maximum retreat distance of the first treatment tool (10).

[0076] Figure 7 (a) shows a single hole bushing (62) according to an embodiment of the present invention, and Figure 7 (b) is a transparency of a tube portion (200) to which the single hole bushing (62) is fastened.

[0077] A single hole bushing (62) is provided in the double lumen (201) and can limit the maximum retraction distance of the first treatment tool (10) or the second treatment tool (30). Here, the treatment tool whose maximum retraction distance is limited by the single hole bushing (62) may correspond to the treatment tool whose maximum advancement distance is limited by the double hole bushing (61). In the previous embodiment, the second treatment tool (30) is a needle and the maximum advancement distance is limited by the double hole bushing (61). Therefore, in this embodiment, the treatment tool whose maximum retraction distance is limited by the single hole bushing (62) may be the second treatment tool (30).

[0078] The single hole bushing (62) can prevent another instrument from being unintentionally removed from the standby position and retracted when one instrument is discharged from the single lumen (202) by the actuation of the operating handle (50).

[0079] A single hole bushing (62) can be inserted into the second lumen (2012). In the tube portion (20), the single hole bushing (62) is positioned rearward relative to the double hole bushing (61). The single hole bushing (62) can have an inner diameter formed through a hole (621) through which the second guide (300) passes. The inner diameter of the hole (621) can be formed smaller than the outer diameter of the extended end (301) of the second guide (300) as the rear end of the second instrument (30) is inserted into the second guide (300). That is, the second guide (300) has a step at its end that is extended relative to the tube tube, and the inner diameter of the hole (621) can be formed such that the tube tube (300) passes through it but the end (301) of the tube tube does not pass through it.

[0080] The single hole bushing (62) can be inserted into one of the two lumens (2012) of the double lumen (201). The single hole bushing (62) can be provided in a tapered shape in which the outer diameter (620) of the rear end expands based on the direction of penetration during insertion, and can be fitted and fixed. In one embodiment, the single hole bushing (62) can be provided in an hourglass shape in which the outer diameter expands in the outward direction based on the center. The single hole bushing (62) can be inserted into an appropriate position in the lumen in the expanded state, and when the inner diameter of the lumen is restored, the position can be naturally fixed due to the fixing portions (620) having tapered shapes on both sides. The single hole bushing (62) according to the present embodiment can prevent the instrument (20) from being retracted due to the aforementioned backflash phenomenon.

[0081] Fig. 8 illustrates a tube portion (20) having a double lumen (201) formed therein of a medical discharge device (1) according to another embodiment of the present invention. The medical discharge device (1) according to the embodiment of Fig. 8 exemplifies an IT type high-frequency treatment device. Referring to Fig. 8, the IT type medical discharge device (1) may have a double lumen (201) forming the distal end of the tube portion (20) without a single lumen area. The medical discharge device (1) according to the present embodiment may include a first single hole bushing (63) and a second single hole bushing (62) in the tube portion (20).

[0082] In this embodiment, in the non-actuated state of the operating handle (50), the standby position for actuation of the first treatment tool (10) may be formed on the outside of the double lumen (201) exposed from the first lumen (2011). On the other hand, the standby position for discharge of the second treatment tool (30) may be formed on the inside of the double lumen (201) which is the inside of the second lumen (2012).

[0083] In one embodiment, the first and second single-hole bushings (63, 62) may both have an hourglass shape with an outer diameter that increases from the center outward. The first and second single-hole bushings (63, 62) may both be fitted into a lumen in a structural shape and press-fitted.

[0084] The first single hole bushing (63) is provided in the second lumen (2012) to limit the maximum forward distance of the second treatment tool (30). The first single hole bushing (63) has a hole formed with an inner diameter smaller than the outer diameter of the second guide (300), so that the maximum forward distance of the second treatment tool (30) can be limited by the catch of the second guide (300) or the end (301) of the second guide (300).

[0085] A second single hole bushing (62) may be provided in the second lumen (2012) to limit the maximum retraction distance of the second instrument (30). The second single hole bushing (62) may have a hole formed with an inner diameter through which the second guide (300) may pass, but the inner diameter of the hole may be formed to be smaller than the outer diameter of the expanded end (301) of the second guide (300) as the rear end of the second instrument (30) is inserted into the second guide (300). That is, the inner diameter of the hole of the second single hole bushing (62) may be formed to be larger than the tube (300) of the second guide and smaller than the end (301) of the second guide.

[0086] Fig. 9 shows a hub (22) configured in a main body (2) according to an embodiment of the present invention.

[0087] In this embodiment, the protective tube (21) has a shorter length than the outer tube (202) and is partially formed at the proximal portion where the hub (22) is provided, so that it can be fitted and fixed to the hub (22). The protective tube (21) can protect the tube portion (20) from external force such as bending or pressing.

[0088] A hub connector (40) may be included within the hub (22). The hub connector (40) has a rear end that is connected to the hub (22), and a tube portion (20) is fitted at the front end. The first guide (100) and the second guide (300) that penetrate the inside of the tube portion (20) may be guided to the inside of the main body (2) by passing through and passing through the hub connector (40). At the bottom of Fig. 9, the protective tube (21) is omitted, and the hub connector (40) and the hub (22) connected to the tube portion (20) are transparently merged.

[0089] In this embodiment, the hub connector (40) can be bonded to the hub (22) and fixedly connected. Since the medical discharge device used for ESD and EMR procedures generates heat from the knife electrode and wire, a heat-resistant tube must be used. The material of the heat-resistant tube is mainly Teflon series (PTFE), which cannot be bonded with a cyanoacrylate series adhesive. The tube part (20) cannot be directly bonded to the hub (22), so it must be fixed by fitting under pressure. The pressure fixing method of the tube can be firmly fixed so that the tube does not fall out. However, the pressure fixing method has the limitation of low rotational fixing strength. In particular, if the handpiece is used repeatedly, the tube may be twisted during the twisting and rotational operation of the handpiece, which may lead to malfunction. This embodiment presents a hub connector (40) as a fixing means for fixing the tube portion (20) to the hub (22) so that it does not twist or rotate even when performing conventional pressure fitting fixing without adhesive fixing by bonding of the tube portion (20).

[0090] The hub connector (40) is fixed by adhesive bonding to the hub (22) at one end, and the tube portion (20) is fixed by fitting to the hub connector (40) and the hub (22). An embodiment of the hub connector (40) will be described in detail below.

[0091] Fig. 10 shows a hub connector (40) according to an embodiment of the present invention.

[0092] Fig. 10 illustrates a hub (22) coupled to a hub connector (40) according to an embodiment of the present invention. The hub connector (40) is divided into a rear end (41), a body (42), and a front end (43). The hub connector (40) may be provided in a cylindrical shape so as to be coupled to both the fastening portion of the hub (22) and the tube.

[0093] In Fig. 10, the first guide (100) and the second guide (300) penetrating the inner tube (201, 202) are illustrated, and the inner tube (201, 202) and the outer tube (200) are omitted.

[0094] The hub connector (40) may be formed with hollows (401, 403) through which the first guide (100) and the second guide (300) pass, respectively. The hub connector (40) may be formed with a sleeve (43) in which one hollow portion extends longer, so that the sleeve (43) may define a tip.

[0095] The hub connector (40) has hollows (401, 403) with different inner diameters through which the first guide (100) and the second guide (300) pass, respectively, and a sleeve (43) can be formed in the hollow (403) with a larger inner diameter among the plurality of hollows (401, 403).

[0096] The hub connector (40) is fitted so that the inner tube (201) is fitted into the tip (43), and the outer tube (202) surrounds the outer surface of the hub connector (40) so that the hub connector (40) is inserted. In this embodiment, the inner tube (201) has a double lumen, and a sleeve (43) can be inserted into the lumen of the double lumen of the inner tube (201) into which the needle is inserted. In order to organize the embodiment in which the inner tube (201) is fitted and connected to the hub connector (40), it should be considered that the outer diameters of the wires inserted into the tube portion (20) of the first guide (100) and the second guide (300) may be different from each other. In general, the outer diameter of the wire of the high-frequency knife instrument is thin because the instrument is guided by a metal wire. On the other hand, the outer diameter of the needle tube is formed thicker because the instrument of the needle is guided by a needle tube into which sterile water or a drug is injected. Accordingly, the lumen of the inner tube (201) that accommodates the needle and the high-frequency knife with a double lumen can be formed with different inner diameters.

[0097] In this embodiment, a wire of a treatment instrument with a small outer diameter, such as a high-frequency knife wire, is inserted into a hollow space (401) of a small inner diameter of a hub connector. A wire of a treatment instrument with a large outer diameter, such as a needle tube, is inserted into a hollow space (403) of a large inner diameter of a hub connector. Among these, a sleeve (43) is formed in the hollow space (403) of a larger inner diameter to extend the length of the hollow space. As each treatment instrument is inserted into the hollow space (401, 403) according to the above conditions, a sleeve (43) can be inserted into a lumen of the inner tube (201) into which the needle tube is inserted. On the other hand, in the lumen of the inner tube (201) into which the knife wire is inserted, the end of the lumen is in contact with the body (42) at the location of the hollow space (401). In this embodiment, the inner tube (201) is provided so as not to be larger than the inner diameter of the body (42) and can be fixed in a state of being fitted into the sleeve (43), which is the tip. That is, the inner tube (201) can be fitted into the sleeve (43) in only one of the two lumens.

[0098] Meanwhile, the outer tube (200) can be fitted into the body (42) of the hub connector (40). The outer tube (200) has a single lumen and its inner diameter can correspond to the outer diameter of the body (42). The outer tube (200) can be fitted around the entire hub connector (40) with the inner tube (201) fitted into the sleeve (43).

[0099] The function of the hub connector (40) through this coupling relationship is explained as follows.

[0100] The hub connector (40) can be fixed by adhesively inserting the rear end (41) into the fastening portion of the hub (22). The rear end (41) may be inserted inwardly into the front end of the hub (22), or the front end may be inserted into the rear end (41) and bonded. The body (42) holds the first guide (100) and the second guide (300) so that when rotation or twisting occurs from the hub (22), the rotational force is directly transmitted to the first treatment tool (10) and the second treatment tool (30) through the guides. The rotational or twisting force directly transmitted to the first guide (100) and the second guide (300) is transmitted to the lumen of the inner tube (201). Therefore, when the hub connector (40) fixed to the hub (22) rotates, the inner tube (201) also receives the same rotational force. This prevents the torsional momentum from being applied only to the outer tube (202) that is wrapped around the body (42) of the hub connector (40), so that rotation does not occur relatively. As a result, when the hub (22) is twisted or rotated, the hub connector (40) also rotates in the same manner, and as the force is transmitted so that both the inner tube (201) and the outer tube (202) rotate in the same manner, the tube portion (20) from the hub (22) is not twisted.

[0101] Fig. 11 shows an exploded cross-sectional view of a main body (2) according to an embodiment of the present invention.

[0102] Fig. 11 illustrates the configuration of an operation module (70) that enables selective locking of the first and second treatment devices (10, 30). In this embodiment, the main body (2) may include a first cylinder (800), a second cylinder (900), and a fixing pin (77). The fixing pin (77) translates up and down in a designated groove. A first connecting portion (80) may be formed in the first cylinder (800), and a second connecting portion (90) may be formed in the second cylinder (900). The first cylinder (800) and the second cylinder (900) may be slidably driven by a driving distance (S2).

[0103] Referring to Fig. 11, the first guide (100) is fixedly connected to the first cylinder (800). The second guide (300) is fixedly connected to the second cylinder (900). The operating handle (50) can pressurize and push out the operating module (70), and the operating module (70) is engaged with a member of either the first cylinder (800) or the second cylinder (900). In the present embodiment, when the operating module (70) is toggled downward based on Fig. 11, the fixing pin (77) is pushed down to lock the second cylinder (900). Thereafter, the operating module (70) is engaged with the first cylinder (800) and moves forward together with the forward movement of the operating handle. For other detailed embodiments, reference may be made to the embodiments of the applicant's prior published patent No. 2023-0038148.

[0104] Fig. 12 shows a tube portion (20') according to another embodiment of the present invention. The tube portion (20') can be divided into a double lumen (2011', 2012') region and a single lumen (202') region with A as the boundary. The tube portion (20') can be manufactured from a single integrated double lumen tube. In this case, it is distinguished from the previous embodiment in which the double lumen and single lumen are configured by a double tube structure of an inner tube and an outer tube. In this embodiment, the distal end after A in the double lumen tube having the first lumen (2011') and the second lumen (2012') is formed into one lumen (202'). As an example, the distal end is fractured to the region A by drilling to form two lumens into one lumen. The tube portion (20') according to the present embodiment is not limited to the above-described manufacturing example, and any method that can partially form two lumens and one lumen from one tube can be applied. In this case, the double lumen tube is preferably formed with an inner thickness of 0.4 mm to 0.65 mm. The inner thickness may refer to the thickness of the tube wall. According to the present embodiment, the tube portion (20') can be formed with a tube wall thickness of 0.4 mm to 0.65 mm at the distal end by forming a groove at the distal end of a tube in which a double lumen is formed to form a single lumen.

[0105] While the technical concept of the present invention and disclosure has been illustrated by the embodiments described above, the technical concept of the present invention encompasses various substitutions, modifications, and variations that can be made within the scope understandable to those of ordinary skill in the art. Furthermore, it should be understood that such substitutions, modifications, and variations are encompassed within the scope of the appended claims.

[0106] [Explanation of symbols]

[0107] 1: Medical discharge device 10: First treatment device

[0108] 100: 1st Guide 30: 2nd Treatment Area

[0109] 300: Second Guide 301: Terminal

[0110] 2: Body 20: Tube section

[0111] 21: Protective tube 200: Outer tube

[0112] 201: Double Lumen 2011: First Lumen

[0113] 2012: Second Lumen 202: Single Lumen

[0114] 22: Hub 33: Connector

[0115] 40: Hub connector 41: Rear end

[0116] 42: Body 43: Fleet

[0117] 401, 403: Hollow 50: Control knob

[0118] 60: Tip bushing 61: Double hole bushing

[0119] 611: Hole 1 612: Hole 2

[0120] 62, 63: Single hole bushing 620: Fixed part

[0121] 621: Hall 70: Operation Module

[0122] 77: Fixed pin 80: First connecting part

[0123] 800: Cylinder 1 90: Second connection

[0124] 900: Cylinder 2

[0125]

[0126] The present invention relates to a medical discharge device, which enhances the convenience and safety of endoscopic procedures by allowing multiple instruments to be controlled by a single discharge device. In particular, the device boasts high practicality in medical settings due to its technical features, including prevention of backflash, tube breakage, and instrument detachment, and can contribute to improved treatment efficiency for medical professionals and ensuring patient safety.

Claims

1. In a medical discharge device in which multiple treatment devices are used together, A body provided with one or more operating handles; A first guide for transmitting the tensile force of the above-mentioned operating handle, and a first treatment tool connected to the end of the first guide; A second guide transmitting the tensile force of the above-mentioned operating handle, and a second treatment tool connected to the end of the second guide; Guide the above first treatment device and the above second treatment device into the body, A tube section having a double lumen in which a first lumen into which the first guide penetrates and a second lumen into which the second guide penetrates are formed, and a single lumen in which the first treatment tool and the second treatment tool intersect to form a distal portion from which one of the treatment tools is discharged; A double hole bushing provided in the above single lumen and limiting the maximum forward or backward distance of the first treatment tool or the second treatment tool; and A single hole bushing provided in the above double lumen and limiting the maximum retraction distance of the first treatment tool or the second treatment tool; The above first treatment device and the above second treatment device, A medical discharge device characterized in that the standby position for discharge in a non-operating state of the above-mentioned operating handle is the inner space of the above-mentioned single lumen.

2. In paragraph 1, The above single hole bushing, A medical discharge device characterized in that when one treatment tool is discharged from the single lumen by the actuation of the above-mentioned operating handle, another treatment tool is prevented from being dislodged from the standby position and retracted.

3. In paragraph 1, The above double hole bushing, Forming a boundary between the above double lumen and the above single lumen, When the first treatment tool and the first guide are connected in the area of ​​the single lumen, the second treatment tool and the second guide are connected in the area of ​​the double lumen. A medical discharge device characterized in that the first guide is inserted into the first hole of the double hole bushing, and the second treatment tool is inserted into the second hole of the double hole bushing, and the connected positions of the treatment tool and the guide are different with the double hole bushing as the boundary.

4. In paragraph 3, The above double hole bushing, Limit the maximum forward distance of the above second treatment device, A medical discharge device characterized by limiting the maximum retraction distance of the first treatment device.

5. In paragraph 3, The above single hole bushing, A medical discharge device characterized by limiting the maximum retraction distance of the second treatment device.

6. In paragraph 3, The above first treatment tool is a high-frequency knife and the above first guide is a conductive wire, A medical discharge device, characterized in that the second treatment device is a needle and the second guide is a needle tube.

7. In paragraph 3, The above double hole bushing, The inner diameter of the first hole is formed smaller than the outer diameter of the rear end of the first treatment tool, A medical discharge device characterized in that the inner diameter of the second hole is formed smaller than the outer diameter of the end of the second guide.

8. In paragraph 3, The above single hole bushing, A medical discharge device characterized by being inserted into the second lumen.

9. In paragraph 8, The above single hole bushing, A hole having an inner diameter through which the second guide penetrates is formed, The rear end of the second treatment device is inserted into the second guide, and the end of the second guide is extended. A medical discharge device characterized in that the inner diameter of the hole is formed smaller than the outer diameter of the extended end of the second guide.

10. In paragraph 1, The above single hole bushing, Interpolated into one lumen of the two lumens of the above double lumen, A medical discharge device characterized by a tapering shape in which the outer diameter of the rear end expands based on the direction of penetration during insertion, and by being fitted and fixed.

11. In paragraph 1, The above tube part, A medical discharge device characterized in that the distal portion of the tube in which the double lumen is formed is grooved to form the single lumen, thereby forming the tube wall thickness of the distal portion to be 0.4 mm to 0.65 mm.

12. In paragraph 1, The rear end is connected to the hub formed in the above body, and the tube part is fitted to the front end. A medical discharge device characterized in that the first treatment device and the second treatment device further include a hub connector that penetrates and is guided to the main body.

13. In a medical discharge device in which multiple treatment devices are used in combination, A body provided with one or more operating handles; A first guide for transmitting the tensile force of the above-mentioned operating handle, and a first treatment tool connected to the end of the first guide; A second guide transmitting the tensile force of the above-mentioned operating handle, and a second treatment tool connected to the end of the second guide; A double lumen formed by guiding the first treatment device and the second treatment device into the body, wherein a first lumen into which the first guide penetrates and a second lumen into which the second guide penetrates are formed; When the above-mentioned operating handle is in a non-operating state, the first treatment tool is formed in a standby position for operation on the outside of the double lumen exposed from the first lumen, and the second treatment tool is formed in a standby position for discharge on the inside of the double lumen, which is the inside of the second lumen. A first single hole bushing provided in the second lumen to limit the maximum forward distance of the second instrument; and a second single hole bushing provided in the second lumen and limiting the maximum retraction distance of the second treatment tool; Medical discharge device.

14. In paragraph 13, The above first single hole bushing, A medical discharge device characterized in that a hole having an inner diameter smaller than the outer diameter of the second guide is formed, thereby limiting the maximum forward distance of the second treatment tool by the catch of the second guide.

15. In paragraph 13, The above second single hole bushing, A hole having an inner diameter through which the second guide penetrates is formed, A medical discharge device characterized in that the inner diameter of the hole is formed smaller than the outer diameter of the extended end of the second guide as the rear end of the second treatment tool is inserted into the second guide.

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