An auxiliary medication delivery device for intensive care

Abstract

This invention discloses an auxiliary medication feeding device for intensive care, relating to the field of medical device technology. It includes a transfer assembly with an input interface and an input cavity communicating with the input interface; a tubing assembly comprising a coaxially sleeved and relatively slidable outer tube and inner tube; and an expansion assembly located in the middle section of the outer tube, including a limiting membrane and an expansion flap, the limiting membrane and expansion flap being inclined in opposite directions and both pointing towards the cardia. The transfer assembly of this auxiliary medication feeding device for intensive care incorporates a slidable piston and an elastic element, forming a mechanical pressure feedback valve that effectively prevents reflux and patient discomfort caused by sudden pressure increases. Furthermore, the expansion flap design allows it to closely conform to the cardia area, forming a physical sealing barrier. This effectively blocks the reflux of gastric contents, significantly reducing the risk of aspiration pneumonia.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to an auxiliary medication feeding device for intensive care. Background Technology

[0002] In intensive care clinical nursing, providing enteral nutrition and medication support to patients who are unable to eat orally is a routine and crucial procedure. Currently, the most widely used feeding devices in clinical practice include ordinary gastric tubes, nasogastric tubes, and multifunctional feeding tubes that have emerged in recent years.

[0003] In existing technologies, conventional gastric tubes and nasogastric tubes are typically single-lumen or double-lumen parallel structures, primarily serving as a channel for administering nutritional solutions and medications. However, these devices pose a high risk of reflux and aspiration in practical applications. Critically ill patients often have relaxed lower esophageal sphincter or impaired gastric motility. During medication administration or nasogastric feeding, gastric contents can easily reflux along the gap between the tube wall and the esophagus into the pharynx, leading to aspiration into the airway, causing aspiration pneumonia or even suffocation, seriously threatening the patient's life. Current anti-reflux measures mainly rely on positional management (such as elevating the head of the bed) and regular aspiration to check for gastric retention, but these passive measures are insufficient to fundamentally prevent reflux.

[0004] Furthermore, the safety of drug administration is poor. When administering medications or nutritional solutions via syringe, nurses find it difficult to precisely control the injection speed and pressure. Injecting too quickly can cause a sudden increase in gastric pressure, inducing nausea, vomiting, or even worsening reflux; injecting too slowly prolongs the procedure and increases the workload. Existing devices lack effective pressure feedback and automatic adjustment mechanisms, relying entirely on the operator's experience, which poses significant safety risks. Summary of the Invention

[0005] The purpose of this invention is to provide an auxiliary medication delivery device for critical care, in order to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary medication delivery device for intensive care, comprising: The adapter assembly is provided with an input interface and an input cavity communicating with the input interface, and a piston for changing the flow cross section according to the pressure is slidably disposed in the input cavity; A pipe assembly includes an outer tube and an inner tube that are coaxially sleeved and can slide relative to each other, the proximal end of the outer tube is connected to a transition assembly, and the annular gap between the outer tube and the inner tube forms an input cavity; An expansion assembly, located in the middle section of the outer tube, includes a limiting membrane and an expansion flap, wherein the limiting membrane and the expansion flap are inclined in opposite directions and both point towards the cardia. The limiting membrane can be radially expanded after the outer tube is inserted to support the end of the esophagus; the expansion flap includes a first flap and a second flap connected to each other, and the free ends of the first flap and the second flap can slide along the axial direction of the outer tube and be driven to fold from the initial state to the radially expanded state to form a funnel-shaped structure for covering the cardia.

[0007] Preferably, the limiting membrane is embedded with a plurality of circumferentially distributed driving members, each driving member having an abutment portion, and a baffle that cooperates with the abutment portion is slidably disposed on the outer tube.

[0008] Preferably, the limiting membrane includes a front diaphragm and a rear diaphragm, and a receiving space for accommodating the drive member and the baffle is formed between the front diaphragm and the rear diaphragm.

[0009] Preferably, the front diaphragm and the rear diaphragm are glued together, and a groove is provided at the glued position.

[0010] Preferably, the free end of the first paddle is provided with a first connecting portion, and the free end of the second paddle is provided with a second connecting portion; It also includes a traction member, the first end of which is connected to the first connecting part, so that the traction member rotates around the second connecting part and connects to the baffle.

[0011] Preferably, the outer tube is provided with a plurality of positioning parts, and an operating part connected to the end of the traction member is slidably sleeved on the outer tube; The operating component is equipped with a locking element, and the locking element cooperates with the positioning part under the action of the second elastic element.

[0012] Preferably, the inner tube and the adapter assembly are connected by a threaded structure, so that the inner tube can slide axially relative to the outer tube.

[0013] Preferably, the device also includes a mouth ring fixing assembly, which includes a fixator and a connecting tube. The fixator has a limiting groove for accommodating the patient's teeth and is a hollow structure with an suction port.

[0014] Preferably, both the limiting membrane and the expansion flap are covered with a flexible biocompatible material.

[0015] Preferably, the outer wall of the outer tube is provided with a scale for indicating the insertion depth.

[0016] In the above technical solution, the auxiliary medication feeding device for intensive care provided by the present invention has the following beneficial effects: The adapter assembly, combining a sliding piston and an elastic element, forms a mechanical pressure feedback valve, effectively preventing reflux and patient discomfort caused by a sudden increase in pressure. Furthermore, through the design of the expanding flap, the free end of the first flap naturally bends inward after folding, forming a funnel-shaped structure with its opening facing the stomach. This allows for close contact with the cardia area, forming a physical sealing barrier. Compared to the planar sheet or balloon-type sealing methods used in existing technologies, the funnel-shaped structure has a larger contact area and better fit, effectively blocking the reflux channel of gastric contents and significantly reducing the risk of aspiration pneumonia. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 This is a cross-sectional view of the adapter assembly provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the pipe assembly provided in an embodiment of the present invention; Figure 4 A side view of the expansion component provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the fixator structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the limiting membrane structure provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the inner and outer tube structures provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of a piston structure provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Adapter assembly; 2. Connector ring fixing assembly; 3. Pipe assembly; 4. Expansion assembly; 11. Input cavity; 12. Input interface; 13. Internal threaded part; 14. Fixing rib; 15. Piston; 16. First elastic element; 21. Fixing device; 211. Limiting groove; 212. Suction inlet; 22. Connecting pipe; 31. Rotating interface; 32. Inner tube; 321. Side hole; 33. External threaded part; 34. Outer tube; 341. Positioning part; 41. Limiting membrane; 411. Abutting part; 412. Front diaphragm; 413. Rear diaphragm; 414. Groove; 42. First lever; 421. First connecting part; 43. Second lever; 431. Second connecting part; 44. Baffle; 45. Driving component; 46. Traction component; 47. Operating component; 48. Locking component; 481. Second elastic component. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-8 As shown, an auxiliary medication feeding device for critical care includes: a transfer component 1, the transfer component 1 having an input interface 12 and an input cavity 11 communicating with the input interface 12, and a piston 15 slidably disposed in the input cavity 11 for changing the flow cross section according to pressure; The pipe assembly 33 includes an outer tube 34 and an inner tube 32 that are coaxially sleeved and can slide relative to each other. The proximal end of the outer tube 34 is connected to the adapter assembly 1, and the annular gap between the outer tube 34 and the inner tube 32 forms an input cavity. The expansion assembly 4 is located in the middle section of the outer tube 34 and includes a limiting membrane 41 and an expansion flap. The limiting membrane 41 and the expansion flap are tilted in opposite directions and both point towards the cardia. The limiting membrane 41 can be radially expanded after the outer tube 34 is inserted to support the end of the esophagus; the expansion flap includes a first flap 42 and a second flap 43 connected to each other, and the free ends of the first flap 42 and the second flap 43 can slide along the axial direction of the outer tube 34, and be folded from the initial state to the radially expanded state by the pulling of the traction member 46 to form a funnel-shaped structure for covering the cardia.

[0022] Specifically, the input interface 12 of the adapter component 1 is funnel-shaped and is used to connect to a syringe or nutrient solution delivery line. The piston 15 is conical, and an annular flow gap is formed between its outer circumference and the inner wall of the input cavity 11. The piston 15 is slidably connected to the fixing rib 14 fixedly disposed in the input cavity 11, thereby sliding axially within the input cavity 11. The piston 15 is held in a predetermined position by the first elastic element 16. When the fluid pressure in the input cavity 11 exceeds a preset value, the piston 15 moves against the elastic force of the first elastic element 16 to change the flow cross section between the piston 15 and the inner wall of the input cavity 11. When the medicine or nutrient solution is injected through the input interface 12, the liquid pressure acts on the proximal end face of the piston 15. When the injection speed is normal, the piston 15 remains in place, and the liquid smoothly enters the input cavity through the annular flow gap. When the injection speed is too fast and the pressure rises, the piston 15 is pushed to the distal end. Since the inner diameter of the input cavity 11 decreases along the delivery direction, the gap between the piston 15 and the inner wall gradually narrows, automatically limiting the flow rate and preventing the pressure from rising further.

[0023] The outer tube 34 is a flexible tubular structure, with its proximal end fixedly connected to the adapter assembly 1 and its distal end used for insertion into the patient's stomach. The inner tube 32 is coaxially sleeved inside the outer tube 34, and the annular gap between them forms an inlet channel for delivering medication and nutrient solutions. The inner lumen of the inner tube 32 forms an outlet channel for gastrointestinal decompression or suction of obstructions. Multiple side holes 321 are provided on the side wall of the inner tube 32. When the inlet channel is blocked, the side holes 321 can be moved to the blocked position by sliding the inner tube 32, and the blockage can be cleared with negative pressure suction.

[0024] The limiting membrane 41 is an annular thin film structure, with its inclined direction pointing towards the cardia. After the tube is placed in place, it expands radially to support the end of the esophagus, providing axial positioning and isolating the esophageal fistula. The expansion flap consists of a first flap 42 and a second flap 43, which are connected and both are made of flexible material. The length of the first flap 42 is greater than that of the second flap 43. In the initial state, the first flap 42 and the second flap 43 are in a naturally expanded state, facilitating the insertion of the outer tube 34. When it is necessary to block the cardia, the free ends of the first paddle 42 and the second paddle 43 are driven to move closer to each other, causing them to fold (the specific driving method is detailed below. In this embodiment, an axially sliding push-pull ring can be provided on the outer tube 34. The push-pull ring is connected to the free ends of the first paddle 42 and the second paddle 43 through a connecting rod. When the push-pull ring slides to the far end, the connecting rod pushes the free ends of the first paddle 42 and the second paddle 43 closer to each other, thereby causing them to fold. Alternatively, a hydraulic rod can be provided on the outer tube 34, and the extension end of the hydraulic rod can be connected to the free ends of the first paddle 42 and the second paddle 43. The above are all common technical knowledge known to those skilled in the art and will not be elaborated here).

[0025] The first flap 42 is longer than the second flap 43. After folding, its free end bends inward, naturally forming a funnel-shaped structure with its opening facing the stomach. When the funnel-shaped structure expands radially, it tightly covers and blocks the cardia, physically blocking the reflux of stomach contents.

[0026] In the aforementioned technology, the adapter assembly, incorporating a sliding piston 15 and a first elastic element 16, forms a mechanical pressure feedback valve, effectively preventing reflux and patient discomfort caused by sudden pressure increases. After folding, the free end of the first flap 42 naturally bends inward, forming a funnel-shaped structure with its opening facing the stomach. This allows for close contact with the cardia area, forming a physical sealing barrier. Compared to existing technologies using planar sheet-like or balloon-like sealing, the funnel-shaped structure has a larger contact area and better fit, effectively blocking the reflux channel of gastric contents and significantly reducing the risk of aspiration pneumonia.

[0027] As a further embodiment of the present invention, the limiting membrane 41 is embedded with a plurality of circumferentially distributed driving members 45, the driving members 45 having an abutment portion 411, and the outer tube 34 is slidably provided with a baffle 44 that cooperates with the abutment portion 411.

[0028] Specifically, the driving component 45 is a long, elastic sheet structure made of medical-grade stainless steel or nickel-titanium alloy, possessing good elasticity. Multiple driving components 45 are evenly distributed circumferentially along the outer tube 34, their roots fixedly connected to the limiting membrane 41, and their free ends extending proximally to form an abutment portion 411. The baffle 44 is annular and coaxially slidably fitted onto the outer tube 34, its distal end face opposite to the abutment portion 411 of the driving component 45. After the outer tube 34 is inserted into place, medical personnel drive the baffle 44 to slide distally along the outer tube 34 using a pushing mechanism. The distal end face of the baffle 44 contacts the abutment portion 411 and continues to advance, applying axial pressure to the driving component 45. Because the middle part of the driving component 45 is fixedly connected to the limiting membrane 41, it deflects around this fixed point under axial pressure, similar to the principle of an umbrella rib opening, thereby evenly expanding the limiting membrane 41 outwards, making it tightly adhere to the inner wall of the distal esophagus. Multiple driving components 45 deflect synchronously to ensure uniform force on the limiting membrane 41, avoiding excessive local stress that could damage the esophageal mucosa. When retraction is required, the baffle 44 retracts, and the driving components 45 return to their original shape due to their own elasticity, causing the limiting membrane 41 to automatically retract. This embodiment uses a driving method that converts axial pressure into radial spreading force, resulting in a simple and reliable structure. Furthermore, the circumferential distribution of the driving components 45 ensures uniform expansion of the limiting membrane.

[0029] As a further embodiment of the present invention, the limiting membrane 41 includes a front diaphragm 412 and a rear diaphragm 413, and a receiving space for accommodating the drive member 45 and the baffle 44 is formed between the front diaphragm 412 and the rear diaphragm 413.

[0030] Specifically, the limiting membrane 41 adopts a split structure design, consisting of two independent components: a front membrane 412 and a rear membrane 413. Both the front membrane 412 and the rear membrane 413 are made of flexible biocompatible materials such as medical-grade silicone through injection molding. Both the front membrane 412 and the rear membrane 413 are annular thin sheets, and their bottoms (i.e., the side closest to the outer tube 34) are respectively provided with inwardly recessed cavity structures. When the front membrane 412 and the rear membrane 413 are aligned, their recessed cavities together form a closed receiving space. This receiving space is used to accommodate the distal portions of the driving member 45 and the baffle 44, wherein the driving member 45 is embedded in the receiving space, its root is fixedly connected to the limiting membrane 41, and the distal end of the baffle 44 extends into the receiving space and is opposite to the abutment portion 411 of the driving member 45.

[0031] Furthermore, the drive unit 45 and the baffle 44 can be precisely positioned before the front diaphragm 412 and the rear diaphragm 413 are assembled and sealed, which improves the assembly accuracy. In addition, the accommodating space protects the internal drive unit 45 and the baffle 44, preventing metal or hard parts from directly contacting the esophageal mucosa and improving the safety of use.

[0032] As a further embodiment of the present invention, the front diaphragm 412 and the rear diaphragm 413 are glued together, and a groove 414 is provided at the glued position.

[0033] Specifically, the cross-sectional shape of the groove 414 can be V-shaped, U-shaped, or rectangular, with a depth of approximately 0.5-1.0 mm and a width of approximately 1.0-2.0 mm, and is continuously or intermittently distributed along the circumference of the front diaphragm 412 and the rear diaphragm 413. When the front diaphragm 412 and the rear diaphragm 413 are aligned, their grooves 414 are aligned to form an adhesive channel. During the assembly stage, the distal ends of the drive component 45 and the baffle 44 are first placed in the recessed cavity of the front diaphragm 412 or the rear diaphragm 413, and then another diaphragm is aligned so that the grooves 414 of the two diaphragms are aligned. Subsequently, a medical-grade adhesive (such as medical silicone adhesive or epoxy resin adhesive) is applied to the groove 414, and the front diaphragm 412 and the rear diaphragm 413 are fixedly connected as a whole by adhesive bonding. The adhesive fills the groove 414 and forms a strong bonding layer after curing. The groove 414 design increases the bonding area, ensuring the connection strength between the front diaphragm 412 and the rear diaphragm 413, preventing peeling during the repeated opening and closing of the limiting membrane 41, and the groove 414 can guide the flow and distribution of the adhesive, avoiding adhesive overflow that could affect the appearance and flexibility of the limiting membrane 41.

[0034] As a further embodiment of the present invention, the free end of the first paddle 42 is provided with a first connecting portion 421, and the free end of the second paddle 43 is provided with a second connecting portion 431; It also includes a traction member 46, the first end of which is connected to the first connecting part 421, so that the traction member 46 rotates around the second connecting part 431 and connects to the baffle 44.

[0035] Specifically, the outer tube 34 is provided with multiple positioning parts 341, and an operating part 47 connected to the end of the traction member 46 is slidably sleeved on the outer tube 34; a locking part 48 is provided inside the operating part 47, and the locking part 48 cooperates with the positioning part 341 under the action of the second elastic member 481. The first connecting part 421 and the second connecting part 431 can be made of metal or hard plastic, and have through holes for the traction member 46 to pass through or slots for fixing the traction member 46. The traction member 46 is a flexible wire structure, which can be made of medical stainless steel wire, polymer fiber filament, or nylon filament, etc. The first end of the traction member 46 is fixedly connected to the first connecting part 421, and then starts from the first connecting part 421, goes around the side of the second connecting part 431 away from the first connecting part 421, i.e., the outer side, and then turns back to the direction of the input cavity 11, and finally the end of the traction member 46 is fixedly connected to the baffle 44. When the baffle 44 is driven to slide distally, the traction member 46 is tightened, and its pulling force acts simultaneously on the first connecting part 421 and the second connecting part 431. Since the traction member 46 passes around the outside of the second connecting part 431, the force on the second connecting part 431 is to push it distally, while the force on the first connecting part 421 is to pull it proximally. This opposing force causes the free ends of the first lever 42 and the second lever 43 to approach each other. Since both the first lever 42 and the second lever 43 are made of flexible materials, they fold as their free ends approach each other. Because the first lever 42 is longer than the second lever 43, after folding, the free end of the first lever 42 bends inward, naturally forming a funnel-shaped structure with its opening facing the stomach.

[0036] The positioning part 341 is a protrusion or groove structure arranged axially along the outer wall of the outer tube 34, and can take the form of a key, groove, or rack. Multiple positioning parts 341 are arranged at equal or unequal intervals to form multiple positions. The operating member 47 is a sleeve-shaped structure that slides on the outer tube 34, and its interior has a chamber for accommodating the locking member 48. The locking member 48 is lever-shaped, hinged to the operating member 47 in the middle via a pivot, with a pawl at one end that cooperates with the positioning part 341, and a pressing end at the other end. The second elastic member 481 is a compression spring or torsion spring, disposed between the pawl end of the locking member 48 and the operating member 47, providing elastic force to press the pawl against the positioning part 341. The end of the traction member 46 is fixedly connected to the operating member 47. When it is necessary to adjust the degree of expansion of the limiting membrane 41 and the expansion lever, the medical staff presses the pressing end of the locking member 48, causing the claw end to overcome the elastic force of the second elastic member 481 and lift off the positioning part 341, allowing the operating member 47 to slide axially along the outer tube 34. As the operating member 47 slides, the traction member 46 is pulled or released, thereby adjusting the position of the baffle 44, and thus controlling the degree of expansion of the limiting membrane 41 and the folding angle of the expansion lever. When the operating member 47 slides to the ideal position, the pressing end of the locking member 48 is released, and the claw, under the action of the second elastic member 481, re-engages with the nearest positioning part 341, achieving locking.

[0037] As a further embodiment of the present invention, the inner tube 32 is connected to the adapter assembly 1 by a threaded structure so that the inner tube 32 can slide axially relative to the outer tube 34.

[0038] Specifically, the connection between the adapter component 1 and the outer tube 34 is provided with an internal thread portion 13, which is either an internal threaded hole or an internal threaded sleeve structure. The outer wall of the inner tube 32 has an external thread portion 33 machined in the proximal section, and the pitch and inner diameter of the external thread portion 33 match those of the internal thread portion 13. When clearing blockage, medical personnel hold and rotate the rotating interface 31. Through the meshing action of the internal thread portion 13 and the external thread portion 33, the inner tube 32 generates precise axial displacement relative to the outer tube 34. By controlling the number of rotations, the side hole 321 on the side wall of the inner tube 32 can be precisely moved to the blocked position in the input cavity. At this time, a negative pressure suction device is connected through the rotating interface 31, and the blockage can be sucked into the inner cavity of the inner tube 32 and discharged. After clearing the blockage, the rotating interface 31 is rotated in the opposite direction, and the inner tube 32 returns to its original position.

[0039] As a further embodiment of the present invention, it also includes a mouth ring fixing component 2, which includes a fixator 21 and a connecting tube 22. The fixator 21 has a limiting groove 211 for accommodating the patient's teeth, and the fixator 21 has a hollow structure and an suction port 212.

[0040] Specifically, the fixator 21 is an elliptical ring made of flexible silicone, and its cross-sectional dimensions match the patient's oral cavity. A limiting groove 211 is circumferentially formed along the outer surface of the fixator 21, with depth and width adapted to the size of adult teeth. When the patient bites, the teeth fall into the limiting groove 211, which both fixes the outer tube 34 and prevents the tube from being flattened due to involuntary biting. The fixator 21 has a hollow chamber inside, which communicates with the oral cavity through multiple suction ports 212 located on the inner side of the fixator 21 near the inside of the oral cavity. One end of the connecting tube 22 connects to the hollow chamber of the fixator 21, and the other end connects to a negative pressure source such as a negative pressure suction device or a rotating interface 31 rotatably mounted at the end of the inner tube 32, forming a negative pressure passage. In use, the fixator 21 is fitted onto the outer tube 34. After the patient bites down, the negative pressure source is connected and turned on. The negative pressure is transmitted to the hollow chamber of the fixator 21 through the connecting tube 22, and then continuously aspirates the saliva accumulated in the oral cavity through the suction port 212. The fixator 21 simultaneously fixes the outer tube 34 and drains saliva, effectively avoiding the risk of choking and aspiration caused by saliva accumulation in patients with oral catheters.

[0041] As a further embodiment of the present invention, both the limiting membrane 41 and the expansion flap are covered with a flexible biocompatible material.

[0042] Specifically, the main structure of the limiting membrane 41 and the expansion flaps (first flap 42, second flap 43) can be made of materials with certain strength and elasticity, such as medical-grade polyurethane or nylon, to ensure structural stability when expanded. A layer of flexible biocompatible material, preferably medical-grade silicone or polyurethane film, with a thickness of approximately 0.1-0.3 mm, is coated onto the outer surface of the main structure through impregnation, spraying, or hot-pressing processes. This coating layer is tightly bonded to the main structure, forming a composite layer structure. The coating layer provides a soft contact interface, preventing the rigid structure from directly contacting the esophageal and cardia mucosa.

[0043] As a further embodiment of the present invention, the outer wall of the outer tube 34 is provided with a scale for indicating the insertion depth.

[0044] Specifically, the outer wall of the outer tube 34 is marked with clear graduation lines every 1 or 2 centimeters, starting from the distal end, and labeled with corresponding numbers (such as "40cm", "45cm", "50cm"). The graduation lines can be laser-marked or printed with medical-grade ink to ensure they do not peel off or fade over long-term use. Different colors can be used to distinguish different intervals, for example, blue for the 40-45 cm interval and red for the 45-50 cm interval, facilitating quick identification. During insertion, medical personnel use the patient's incisors or lips as a reference point to observe the graduation values ​​on the outer tube 34, thus accurately determining the position of the distal end of the outer tube 34 and the expansion component 4. Based on clinical experience, the adult cardia is usually located approximately 45-50 cm below the incisors. When the graduations show this value, it can be confirmed that the expansion component 4 has reached the cardia area, and the deployment of the limiting membrane 41 and the expansion flap can then proceed. This embodiment provides a visual reference for the precise positioning of the expansion component 4 by setting an insertion depth scale, avoiding the risk of sealing failure due to shallow insertion or damage to the gastric mucosa due to deep insertion, and significantly improving the safety and accuracy of the operation.

[0045] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An auxiliary medication delivery device for intensive care, characterized in that, include: The adapter assembly (1) is provided with an input interface (12) and an input cavity (11) connected to the input interface (12). A piston (15) for changing the flow cross section according to the pressure is slidably arranged in the input cavity (11). The pipe assembly (3) includes an outer tube (34) and an inner tube (32) that are coaxially sleeved and can slide relative to each other. The proximal end of the outer tube (34) is connected to the adapter assembly (1), and the annular gap between the outer tube (34) and the inner tube (32) forms an input cavity. An expansion assembly (4) is disposed in the middle section of the outer tube (34), including a limiting membrane (41) and an expansion paddle, wherein the limiting membrane (41) and the expansion paddle are inclined in opposite directions and both point towards the cardia; The limiting membrane (41) can be radially expanded after the outer tube (34) is inserted to support the end of the esophagus; the expansion flap includes a first flap (42) and a second flap (43) connected to each other, and the free ends of the first flap (42) and the second flap (43) can slide along the axial direction of the outer tube (34) and be driven to fold from the initial state to the radially expanded state to form a funnel-shaped structure for covering the cardia.

2. The auxiliary medication delivery device for intensive care according to claim 1, characterized in that, The limiting membrane (41) is embedded with a plurality of circumferentially distributed driving members (45), the driving members (45) have abutment portions (411), and a baffle (44) that cooperates with the abutment portions (411) is slidably disposed on the outer tube (34).

3. The auxiliary medication delivery device for intensive care according to claim 2, characterized in that, The limiting membrane (41) includes a front diaphragm (412) and a rear diaphragm (413), and a receiving space is formed between the front diaphragm (412) and the rear diaphragm (413) for accommodating the drive member (45) and the baffle (44).

4. The auxiliary medication delivery device for intensive care according to claim 3, characterized in that, The front diaphragm (412) and the rear diaphragm (413) are glued together, and a groove (414) is provided at the glued position.

5. The auxiliary medication delivery device for intensive care according to claim 2, characterized in that, The free end of the first paddle (42) is provided with a first connecting part (421), and the free end of the second paddle (43) is provided with a second connecting part (431). It also includes a traction member (46), the first end of which is connected to the first connecting part (421) so that the traction member (46) can rotate around the second connecting part (431) and connect to the baffle (44).

6. The auxiliary medication delivery device for intensive care according to claim 5, characterized in that, The outer tube (34) is provided with a plurality of positioning parts (341), and the outer tube (34) is also slidably sleeved with an operating part (47) connected to the end of the traction member (46). The operating member (47) is provided with a locking member (48), and the locking member (48) cooperates with the positioning part (341) under the action of the second elastic member (481).

7. The auxiliary medication delivery device for intensive care according to claim 1, characterized in that, The inner tube (32) is connected to the adapter assembly (1) by a threaded structure, so that the inner tube (32) can slide axially relative to the outer tube (34).

8. The auxiliary medication delivery device for intensive care according to claim 1, characterized in that, It also includes a mouth ring fixing assembly (2), and the mouth ring fixing assembly (2) includes a fixator (21) and a connecting tube (22). The fixator (21) has a limiting groove (211) for accommodating the patient's teeth, and the fixator (21) is a hollow structure and has an intake port (212).

9. The auxiliary medication delivery device for intensive care according to claim 1, characterized in that, Both the limiting membrane (41) and the expansion flap are covered with a flexible biocompatible material.

10. The auxiliary medication delivery device for intensive care according to claim 1, characterized in that, The outer wall of the outer tube (34) is provided with a scale for indicating the insertion depth.

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