Visual mouth-nose exchange device for endoscopic nasobiliary drainage

Abstract

The visual mouth-nose exchange device comprises a main body, a tongue-pressing-shaped front end, a guide wire, a push-pull rod, a limiting block and a lighting device, the main body is provided with an inner cavity, the tongue-pressing-shaped front end forms an outer contour through a round pipe communicated with the inner cavity, and the tongue-pressing-shaped front end and the main body are integrally formed. The push-pull rod is sleeved with a limiting block in a sliding mode, one end of the push-pull rod is inserted into the inner cavity from the rear end of the body, the limiting block is clamped in the inner cavity of the body, and the push-pull rod slides front and back under the limiting effect of the limiting block. The two ends of the guide wire penetrate through the holes to be inserted into the inner cavity to be fixed to the front end of the push-pull rod, a through groove for containing the lighting device is formed in the front end of the body, and the head of a lamp bead of the lighting device is exposed out of the body and rushes to the tongue-pressing-shaped front end. During an operation, the lamp beads widen the visual field of the operation, the risk that the device touches the rear wall of the oral pharynx is reduced, the success rate during extraction is increased, and the pain of a patient is relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a visual mouth-nose exchange device for endoscopic nasobiliary drainage. Background Art

[0002] Endoscopic nasobiliary drainage is established on the basis of diagnostic retrograde cholangiography (ERCP) technology and is a commonly used endoscopic biliary drainage method. During the operation, in order to prevent postoperative cholangitis, the nasobiliary duct is placed for biliary drainage. The external segment of the nasobiliary duct needs to be transferred from the oral cavity to the nasal cavity. After the soft tube is lowered from the nasal cavity to the oral cavity, the external segment of the nasobiliary duct is connected to the oral segment of the soft tube, and the external segment of the nasobiliary duct is transferred from the oral cavity to the nasal cavity to complete the mouth-nose exchange.

[0003] The traditional method of oral-nasal conversion is to insert a nasal guide tube into the nose and remove it through the mouth with an oval forceps or a guide wire to form an oral-nasal passage. Both methods of clamping or guide wire removal cause strong oropharyngeal irritation symptoms and may even damage the mucosa.

[0004] In order to reduce the patient's pain, ERCP is mostly performed under anesthesia. The patient cannot wake up immediately after anesthesia and does not have the ability to cooperate under anesthesia. The nasobiliary drainage tube cannot be smoothly transferred from the oral cavity to the nasal cavity. At the same time, patients under anesthesia will also experience tongue prolapse, and the space in the oral cavity is small. The position of the tube cannot be clearly seen during the operation, which increases the chance of sheath failure and sheath slippage, and significantly increases the difficulty of nasal catheter transfer. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides an easy-to-use visual oral-nasal exchanger, which facilitates the insertion of the nasobiliary hose into the ring and smoothly transfers the nasobiliary duct from the oral cavity to the nasal cavity. At the same time, the visual field in the oral cavity is increased, making the doctor's operation smoother and reducing the pain of the patient.

[0006] The utility model is implemented as follows: a visual oral-nasal exchange device for endoscopic nasobiliary drainage comprises a main body, a tongue-depressing front end, a guide wire, a push-pull rod, a limit block, and a lighting device. The main body has an inner cavity, the tongue-depressing front end is surrounded by a round tube communicating with the inner cavity to form an outer contour and is formed integrally with the main body, the round tube is provided with a plurality of openings communicating with the inner cavity and enabling the guide wire to pass through, a limit block is slidably sleeved on the push-pull rod, one end of the push-pull rod is inserted into the inner cavity from the rear end of the main body, the limit block is clamped on the inner cavity of the main body, the push-pull rod slides back and forth under the limiting action of the limit block, the two ends of the guide wire are respectively inserted into the inner cavity through the openings and fixed at the front end of the push-pull rod, a through groove for placing the lighting device is provided at the front end of the main body, the head of the lamp bead of the lighting device is exposed from the main body and rushes toward the tongue-depressing front end.

[0007] The lighting device includes an upper cover, a lower mounting plate, a positive electrode sheet, a negative electrode sheet, an LED lamp bead, a button battery, and a switch. The lower mounting plate is provided with a battery slot for placing batteries and a positioning block for positioning the LED lamp bead. The positioning block is a two-half type with a hollow middle portion for facilitating the passage of the pins of the LED lamp bead. The positive electrode sheet is connected to the button battery and the positive electrode of the LED lamp bead, and the negative electrode sheet is connected to the button battery and the negative electrode of the LED lamp bead. The lower mounting plate is installed on the lower shell of the through slot, and the positive electrode sheet, the negative electrode sheet, the LED lamp bead and the button battery are located in the through slot. The upper cover is connected to the upper shell of the through slot by a snap, and the switch is arranged on the upper cover.

[0008] The switch is a flat push switch, which is divided into three parts: upper, middle and lower. The end face of the upper part is an arc surface with round anti-slip protrusions on the end face, and the lower part has a long protrusion. Before the switch is closed, the long protrusion of the lower part matches the shape of the stamping groove of the positive electrode sheet, and the positive electrode sheet and the pins of the LED lamp bead are in a separated state; when the switch is closed, after pushing the switch, the long protrusion slides out of the stamping groove of the positive electrode sheet, pressing the positive electrode sheet downward, the positive electrode sheet contacts the pins of the LED lamp bead, forming a circuit, and the LED lamp bead lights up; the width of the middle part is slightly smaller than the width of the upper and lower parts, and the middle part is positioned on the upper cover during assembly.

[0009] The bottom surface below the lower mounting plate is in a shape matching the main body shell.

[0010] The two opposite sides of the front end of the push-pull rod are respectively provided with a first clamping groove and a second clamping groove of different lengths for fixing the guide wire.

[0011] The guide wire is made of nickel-titanium memory alloy wire, and the outer surface of the guide wire is coated with a polytetrafluoroethylene film.

[0012] The main body is designed to be arc-shaped and fits tightly against the tongue surface.

[0013] The advantages and technical effects of the utility model are as follows: the utility model has reasonable design and simple structure. During the operation, the switch is slid, the lamp beads light up, the front end of the main body presses the patient's tongue surface to expose the patient's posterior pharyngeal wall, and when the nasal hose falls into the guide wire, the push-pull rod is pulled to drive the guide wire to cover the hose to complete the mouth-nose exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic diagram of the structure of a visual mouth-nose exchange device for endoscopic nasobiliary drainage.

[0015] Figure 2 for Figure 1 Schematic cross-section of .

[0016] Figure 3 for Figure 1 Schematic diagram of the longitudinal section.

[0017] Figure 4 Schematic diagram of the lower mounting plate structure.

[0018] Figure 5 A schematic diagram of the switch structure.

[0019] Figure 6 This is a schematic diagram of the switch structure from another angle.

[0020] Figure 7 It is a schematic diagram of the push-pull rod structure.

[0021] Figure 8 This is a schematic diagram of the push-pull rod structure from another angle.

[0022] Fig. 9 It is a schematic diagram of the structure of the limit block.

[0023] Fig.10 It is a schematic diagram of the longitudinal section of the lighting device. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0027] Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "plurality" means two or more.

[0028] In the description of the invention of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention of the utility model can be understood according to specific circumstances.

[0029] like Figure 1-8 As shown, the utility model of the visual oral-nasal exchange device for endoscopic nasobiliary drainage comprises a main body 1, a tongue-depressing front end 14, a guide wire 2, a push-pull rod 3, a limit block 4, and a lighting device. The main body 1 has an inner cavity 12, and the tongue-depressing front end 14 is surrounded by a circular tube communicating with the inner cavity to form an outer contour and is formed integrally with the main body 1. The circular tube is provided with a plurality of openings 13 communicating with the inner cavity 12 and allowing the guide wire 2 to pass through. The limit block 4 is slidably sleeved on the push-pull rod 3, and one end of the push-pull rod 3 is inserted into the inner cavity 12 from the rear end of the main body 1. The limit block 4 is clamped on the inner cavity 12 of the main body, so that the push-pull rod 3 slides back and forth under the limiting action of the limit block. The two ends of the guide wire 2 respectively pass through the openings 13, are inserted into the inner cavity 12, and are fixed at the front end of the push-pull rod 3. A through groove for placing the lighting device is provided at the front end of the main body 1, and the head of the lamp bead of the lighting device is exposed from the main body 1 and rushes toward the tongue-depressing front end 14.

[0030] The lighting device includes an upper cover 6, a lower mounting plate 5, a positive electrode sheet 8, a negative electrode sheet 9, an LED lamp bead 7, a button battery 11, and a switch 10. The lower mounting plate 5 is provided with a battery slot 5-1 for placing a battery and a positioning block 5-2 for positioning the LED lamp bead. The positioning block is a two-half type with a hollow middle to facilitate the passage of the pins of the LED lamp bead 7. The positive electrode sheet 8 is connected to the button battery 11 and the positive electrode of the LED lamp bead 7, and the negative electrode sheet 9 is connected to the button battery and the negative electrode of the LED lamp bead 7. The lower mounting plate 5 is installed on the lower shell of the through groove, and the positive electrode sheet 8, the negative electrode sheet 9, the LED lamp bead 7 and the button battery 11 are located in the through groove. The upper cover 6 is connected to the upper shell of the through groove by a snap buckle, and the switch 10 is arranged on the upper cover 6.

[0031] The switch 10 is a flat push switch, which is divided into three parts: upper, middle and lower. The end face of the upper part 10-1 is an arc surface with round anti-slip protrusions on the end face, and the lower part 10-2 has a long protrusion. Before the switch is closed, the long protrusion of the lower part 10-2 matches the shape of the stamping groove of the positive electrode sheet 8, and the positive electrode sheet 8 and the pins of the LED lamp bead 7 are in a separated state; when the switch is closed, after pushing the switch, the long protrusion slides out of the stamping groove of the positive electrode sheet 8, pressing the positive electrode sheet 8 downward, and the positive electrode sheet 8 contacts the pins of the LED lamp bead 7 to form a circuit, and the LED lamp bead lights up; the width of the middle part is slightly smaller than the width of the upper and lower parts, and the middle part is positioned on the upper cover 6 during assembly.

[0032] Preferably, the bottom surface of the lower mounting plate 5 is in a shape matching the outer shell of the main body 1 .

[0033] The two opposite sides of the front end of the push-pull rod 3 are respectively provided with a first clamping groove 3-2 and a second clamping groove 3-3 of different lengths for fixing the guide wire 2.

[0034] The guide wire 2 is made of nickel-titanium memory alloy wire, and the guide wire is coated with a polytetrafluoroethylene film.

[0035] Preferably, the main body 1 is designed to be arc-shaped and fits tightly against the tongue surface.

[0036] During implementation, the switch 10 is slid, the lamp bead 7 lights up, and the tongue-shaped front end 14 presses the patient's tongue surface to expose the patient's posterior pharyngeal wall. When the nasal hose falls into the guide wire 2, the push-pull rod 3 is pulled to drive the guide wire to take the hose. The lighting device of the utility model is located inside the main body, the head of the lamp bead is exposed, and the main body is designed to be arc-shaped and fits tightly with the tongue surface; the push-pull rod slides back and forth under the limiting action of the limit block, and the push-pull rod is connected to the guide wire.

[0037] like Fig. 9 As shown, the two ends of the limit block 4 have triangular protrusions 4-1, and the middle buckle position is separated from the two ends. During assembly, the triangular protrusions 4-1 are elastically deformed and buckled into the main body, which is convenient for assembly and not easy to separate.

[0038] Slots are set on both sides of the push-pull rod for fixing the guide wire; the positions of the slots on both sides are asymmetrical, slot 3-2 has a short stroke, and slot 3-3 has a long stroke. During assembly, the guide wire is assembled with slot 3-2 first, and then the push-pull rod is pushed inward, and slot 3-3 is assembled with the guide wire at the other end.

[0039] like Fig.10As shown, the switch 10 is divided into three parts: upper, middle and lower. The end face of the upper part is an arc surface, and there is a dot protrusion 10-1 on the end face, which is non-slip and easy to push; the lower part has a long protrusion 10-2, which cooperates with the shape of the stamping groove of the positive electrode sheet when the switch is closed. After pushing the switch, the protrusion is separated from the stamping groove of the positive electrode sheet, and the positive electrode sheet is pressed down; the width of the middle part is slightly smaller than the width of the upper and lower parts. During assembly, the middle part is positioned on the upper cover 6; the switch is a flat push switch.

[0040] When in use, push the switch forward, the LED light bead lights up, push the push-pull rod close to the limit block, and the guide wire is in a relaxed state at the front end. Place the front end of the device in the oral cavity. When the hose enters the oral cavity from the nasal cavity, pull the push-pull rod under the field of vision of the light bead, tighten the hose and pull it out to complete the mouth-nose exchange. During surgery, the light bead broadens the surgical field of view, reduces the risk of the device touching the posterior wall of the oral pharynx, and increases the success rate of the removal, improves the success rate of the surgery, and reduces the pain of the patient.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A visual oral-nasal exchange device for endoscopic nasobiliary drainage, comprising a main body (1), a tongue-depressing front end (14), a guide wire (2), a push-pull rod (3), a stopper (4), and a lighting device, wherein: The main body (1) has an inner cavity (12), and a tongue-shaped front end (14) is formed integrally with the main body (1) by a circular tube communicating with the inner cavity to form an outer contour, and the circular tube is provided with a plurality of openings (13) communicating with the inner cavity (12) and capable of allowing a guide wire (2) to pass through. A limit block (4) is slidably sleeved on a push-pull rod (3), one end of the push-pull rod (3) is inserted into the inner cavity (12) from the rear end of the main body (1), the limit block (4) is clamped on the inner cavity (12) of the main body, so that the push-pull rod (3) slides forward and backward under the limiting action of the limit block, and the two ends of the guide wire (2) respectively pass through the openings (13) and are inserted into the inner cavity (12) and fixed at the front end of the push-pull rod (3). A through groove for placing a lighting device is provided at the front end of the main body (1), and the head of a lamp bead of the lighting device is exposed from the main body (1) and rushes toward the tongue-shaped front end (14).

2. The visual oral-nasal exchange device for endoscopic nasobiliary drainage according to claim 1, characterized in that: The lighting device comprises an upper cover (6), a lower mounting plate (5), a positive electrode sheet (8), a negative electrode sheet (9), an LED lamp bead (7), a button battery (11), and a switch (10). The lower mounting plate (5) is provided with a battery slot (5-1) for placing a battery and a positioning block (5-2) for positioning the LED lamp bead. The positioning block is a two-half type with a hollow middle for convenient passage of the pins of the LED lamp bead (7). The positive electrode sheet (8) is connected to the positive electrode of the button battery (11) and the LED lamp bead (7). The negative electrode sheet (9) is connected to the negative electrode of the button battery and the LED lamp bead (7). The lower mounting plate (5) is mounted on the lower shell of the through slot. The positive electrode sheet (8), the negative electrode sheet (9), the LED lamp bead (7) and the button battery (11) are located in the through slot. The upper cover (6) is connected to the upper shell of the through slot by a buckle. The switch (10) is arranged on the upper cover (6).

3. The visual oral-nasal exchange device for endoscopic nasobiliary drainage according to claim 2, characterized in that: The switch (10) is a flat push switch, which is divided into three parts: upper, middle and lower. The end face of the upper part (10-1) is an arc surface, and there are round anti-slip protrusions on the end face. The lower part (10-2) has a long protrusion. Before the switch is closed, the long protrusion of the lower part (10-2) matches the shape of the stamping groove of the positive electrode sheet (8), and the positive electrode sheet (8) and the pins of the LED lamp bead (7) are in a separated state; when the switch is closed, after pushing the switch, the long protrusion slides out of the stamping groove of the positive electrode sheet (8), pressing the positive electrode sheet (8) downward, and the positive electrode sheet (8) contacts the pins of the LED lamp bead (7), forming a circuit, and the LED lamp bead lights up; the width of the middle part is slightly smaller than the width of the upper and lower parts, and the middle part is positioned on the upper cover (6) during assembly.

4. The visual oral-nasal exchange device for endoscopic nasobiliary drainage according to claim 2, characterized in that: The bottom surface below the lower mounting plate (5) is in a shape that matches the outer shell of the main body (1).

5. The visual oral-nasal exchange device for endoscopic nasobiliary drainage according to claim 1, characterized in that: Two opposite sides of the front end of the push-pull rod (3) are respectively provided with a first clamping groove (3-2) and a second clamping groove (3-3) of different lengths for fixing the guide wire (2).

6. The visual oral-nasal exchange device for endoscopic nasobiliary drainage according to claim 1, characterized in that: The guide wire (2) is made of nickel-titanium memory alloy wire, and the outer surface of the guide wire is coated with a polytetrafluoroethylene film.

7. The visual oral-nasal exchange device for endoscopic nasobiliary drainage according to claim 1, characterized in that: The main body (1) is designed to be arc-shaped and fits tightly against the tongue surface.

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