Nasogastric feeding tube insertion auxiliary device

Abstract

The invention relates to the field of medical auxiliary instruments, and discloses nasal feeding tube insertion auxiliary equipment which comprises an auxiliary opening part and a wearing part which enables the auxiliary opening part to be worn on the face and to be aligned with one nasal cavity. The auxiliary distraction part comprises a penetrating cylinder and an elastic distraction structure, the penetrating cylinder is connected to the wearing part, a nasal feeding tube can penetrate through the penetrating cylinder, the elastic distraction structure is located in the penetrating cylinder and used for stretching into the nasal cavity to elastically dilate, and an avoiding space is formed in the elastic distraction structure, and the nasal feeding tube can penetrate through the avoiding space. Through the auxiliary opening part, the elastic expansion structure can extend into the nasal cavity to open the nasal cavity opening in an elastic expansion manner, so that the visual field at the nasal cavity opening is wider, the nasal cavity opening does not need to be manually expanded by pinching the nose, the trouble is reduced, and the nasal feeding tube can extend into the nasal cavity more easily so as to enter the throat and other parts deeper until entering the stomach; and the auxiliary opening part can play a role in limiting the movement of the nasal feeding tube to a certain extent after tube insertion is completed, so that the stability of the nasal feeding tube is improved.

Description

Technical Field

[0001] The invention relates to the field of medical auxiliary instruments, and in particular to a nasogastric feeding tube insertion auxiliary device. Background Art

[0002] For infants and young children with serious illnesses, as well as patients who are unable to eat orally or have swallowing dysfunction due to brain damage or neurological diseases, in order to ensure the supply of nutrition, water and medicine to the patients, a nasogastric tube is usually inserted through the patient's nasal cavity, through the pharynx and esophagus, and into the stomach, and liquid food, water and medicine are infused from the tube.

[0003] The steps for using a nasogastric tube are: marking the length of the tube, lubricating the tube, and intubation. During the intubation operation, first hold the front end of the tube with forceps and gently insert it along the selected nasal cavity, and then continue to push the nasogastric tube until it reaches the stomach. In this process, since the shapes of the nasal openings of different patients are different, for patients with narrow nasal openings, the narrow nasal openings affect the insertion of the nasogastric tube to a certain extent. Although lubricants are applied to the front end of the nasogastric tube, medical staff still need to manually expand the nasal opening by squeezing the patient's nose until the nasogastric tube enters the nasal cavity. This is not only troublesome, but also for patients with prostheses or traumas in the nose, it is easy to touch the prostheses or traumas on the bridge and tip of the nose, causing adverse effects. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a nasogastric feeding tube insertion auxiliary device to solve the problem that the stenosis of the nasal cavity affects the use of the nasogastric feeding tube.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a nasofeeding tube insertion auxiliary device including an auxiliary opening part and a wearing part that allows the auxiliary opening part to be worn on the face and aligned with one of the nasal cavities, the auxiliary opening part includes a penetration tube connected to the wearing part and used for the nasofeeding tube to pass therethrough, and an elastic expansion structure located in the penetration tube and used for extending into the nasal cavity and elastically expanding, and the elastic expansion structure has an avoidance space for the nasofeeding tube to pass through.

[0006] Furthermore, a penetration space with a retractable length and connected axially is formed in the penetration tube, the elastic expansion structure is located in the penetration space and one end gradually extends out of the penetration space and elastically expands when the penetration space is shortened, and the avoidance space is arranged coaxially with the penetration space.

[0007] Furthermore, the penetration tube includes an outer tube having a first through hole inside and an inner tube having one end coaxially slidably penetrated into the first through hole through a sliding auxiliary structure, the inner tube having a second through hole axially opened to connect to the first through hole, one end of the elastic expansion structure is fixedly connected to the inner wall of the first through hole and the other end extends into the second through hole, and the first through hole and the second through hole are jointly configured as the penetration space.

[0008] Furthermore, the elastic expansion structure includes at least three elastic strips which are arranged in a ring around the circumference of the outer tube in the penetration space to enclose an avoidance space, one end of the elastic strip is fixedly connected to the inner wall of the first through hole, and the other end of the elastic strip is bent into the second through hole and elastically pressed against the inner wall of the second through hole; when the inner tube slides toward the outer tube to shorten the penetration space, the end of the elastic strip away from the first through hole passes through the penetration space and moves radially toward the side away from the center axis.

[0009] Furthermore, each of the elastic strips includes a connecting end fixedly connected to the inner wall of the first through hole, an arc section extending axially from the connecting end toward the second through hole and with the middle portion radially bent inward, and an expansion end extending from the arc section toward a side away from the connecting end, the expansion end is radially bent outward at the middle portion where it is axially located to form an outer arch portion, and a circular space formed by each of the expansion ends has a diameter greater than the inner diameter of the second through hole when extending out of the through space.

[0010] Furthermore, the outer tube is connected with an auxiliary supporting portion for supporting the tip of the nose when the wearing portion is worn on the face.

[0011] Furthermore, the auxiliary support portion includes a rotating ring coaxially rotatably connected to the end of the outer tube away from the inner tube, a connecting block fixedly connected to the outer side wall of the rotating ring, a connecting rod group with one end hinged to the connecting block and capable of rotational deformation, and a nose pad rotatably connected to the other end of the connecting rod group for supporting the nose tip.

[0012] Furthermore, the nose pad is adapted to the shape of the nose tip of the human body and is provided with a receiving groove for the nose tip to penetrate therein.

[0013] Furthermore, the wearing part includes a first elastic strip for surrounding the nose and lips, a second elastic strip for surrounding the nose and having two ends respectively connected to the two ends of the first elastic strip to form a connection, and a third elastic strip having one end respectively connected to the two connections and the other end detachably connected, the outer tube is connected to the first elastic strip, and the third elastic strip is used to be surrounded on the head.

[0014] Furthermore, a connecting plate is fixedly connected to the first elastic strip, and the outer tube is detachably riveted to the connecting plate along the axial direction.

[0015] The nasogastric feeding tube insertion auxiliary device of the present invention has at least the following beneficial effects: through the cooperation between the wearing part and the auxiliary expansion part, the auxiliary expansion part can be worn on the face and can be aligned with a selected nasal cavity; through the auxiliary expansion part, the elastic expansion structure can be extended into the nasal cavity to expand the nasal opening in an elastic expansion manner, so that the field of view at the nasal opening is wider, and there is no need to manually expand the nasal opening by pinching the nose, thereby reducing trouble, making it easier for the nasogastric feeding tube to be inserted into the nasal cavity so as to enter deeper into the throat and other parts until entering the stomach, and the auxiliary expansion part can limit the movement of the nasogastric feeding tube to a certain extent after the intubation is completed, thereby improving the stability of the nasogastric feeding tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a structural schematic diagram of the nasogastric feeding tube insertion auxiliary device of the present invention;

[0018] Figure 2 for Figure 1 An enlarged view of section A is shown;

[0019] Figure 3 for Figure 1 An enlarged view of portion B is shown;

[0020] Figure 4 It is a partial structural schematic diagram of the nasogastric feeding tube insertion auxiliary device (with hidden inner tube) of the present invention;

[0021] Figure 5 A schematic diagram of wearing the nasogastric feeding tube insertion auxiliary device of the present invention;

[0022] Figure 6 for Figure 5 An enlarged view of section C is shown;

[0023] Figure 7 This is a schematic diagram of the partial structure of another embodiment of the nasogastric feeding tube insertion auxiliary device of the present invention after the inner tube is removed.

[0024] The meanings of the symbols in the accompanying drawings are:

[0025] Auxiliary expansion part 1, penetration tube 11, outer tube 111, riveting block 1111, first through hole 112, inner tube 113, avoidance groove 1131, second through hole 114, closing step 115, elastic expansion structure 12, avoidance space 121, elastic strip 122, connecting end 1221, curved segment 1222, expansion end 1223, outer arch 12231, swing end 1224, support rod 123, sliding auxiliary structure 13, sliding through groove 131, guide slider 132, anti-sliding block 133, wearing part 2, first elastic strip 21, connecting plate 211, second elastic strip 22, third elastic strip 23, auxiliary support part 3, rotating ring 31, connecting block 32, connecting rod group 33, first connecting rod 331, second connecting rod 332, rotating head 333, nose pad 34, accommodating groove 341. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Please refer to Figures 1 to 6 The nasogastric tube insertion auxiliary device of the present invention comprises an auxiliary opening part 1, a wearing part 2 that enables the auxiliary opening part 1 to be worn on the face, and an auxiliary supporting part 3 connected to the auxiliary opening part 1. The auxiliary opening part 1 enables the nasogastric tube to pass through its interior, and can extend into the nasal cavity by elastic extrusion and expansion to open and widen the nasal cavity opening, making the nasal cavity opening more open and easier for the nasogastric tube to enter therein, while also reducing the narrow nasal cavity opening from scratching the nasogastric tube in large quantities, causing the lubricant attached to the surface of the nasogastric tube to be scratched off in large quantities, affecting the lubrication of the nasogastric tube. The wearing part 2 enables the auxiliary opening part 1 to be worn on the nasolabial part (the facial position between the nose and the lips) and can be aligned with one of the nasal cavities, and the aligned nasal cavity can be adjusted. The auxiliary supporting portion 3 is used to support the tip of the nose when the wearing portion 2 is worn on the face, thereby making the auxiliary opening portion 1 more stable. At the same time, when the medical staff continues to insert the nasogastric tube into the patient's body, the auxiliary opening portion 1 is restricted to a certain extent from moving toward the nasal cavity, thereby avoiding the auxiliary opening portion 1 from causing adverse effects on the patient's nose.

[0028] In this embodiment, the auxiliary opening portion 1 includes a penetration tube 11 connected to the wearing portion 2 and an elastic expansion structure 12 located in the penetration tube 11. The penetration tube 11 is used to align the nasal cavity and allow the nasogastric tube to pass through it so that it can be inserted into the nasal cavity more conveniently. The elastic expansion structure 12 is used to extend into the nasal cavity and expand the nasal cavity elastically to expand the nasal cavity, so that the nasal cavity opening is expanded into a more rounded shape, so that the nasogastric tube can be easily inserted into the nasal cavity, and there is no need to manually pinch the nose to insert the nasogastric tube, thereby reducing trouble; at the same time, the elastic expansion structure 12 is restricted to the nasal cavity by elastic expansion of the nasal cavity, thereby limiting the position of the entire auxiliary opening portion 1, so that the position of the auxiliary opening portion 1 relative to the nasal cavity is further fixed, thereby improving its stability.

[0029] In the content defined in the present embodiment, the threading tube 11 is made of a hard material such as plastic or metal, preferably plastic, so as to save costs and have a lighter overall quality. In order to allow the nasogastric tube to pass through the threading tube 11, the threading tube 11 is cylindrical and a threading space connected along the axial direction of the threading tube 11 is provided on the threading tube 11. In order to facilitate the use of the elastic expansion structure 12, the length of the entire threading tube 11 is retractable, so that the length of the threading space is retractable, and the elastic expansion structure 12 is located in the threading space. One end of the elastic expansion structure 12 gradually extends out of the threading space when the threading space is shortened, and the elastic expansion structure 12 gradually expands elastically in the process of extending out of the threading space. It is necessary to insert the elastic expansion structure 12 into the nasal cavity while it extends out of the threading space, so that the nasal cavity is propped open during the gradual expansion of the elastic expansion structure 12.

[0030] In this embodiment, the insertion tube 11 includes an outer tube 111 with a first through hole 112 inside and an inner tube 113 coaxially inserted in the first through hole 112. A sliding auxiliary structure 13 is provided on the outer tube 111 and the inner tube 113 so that one end of the inner tube 113 is coaxially and slidably inserted in the first through hole 112 along the axial direction, so that the length of the insertion tube 11 can be adjusted and retracted, thereby achieving the purpose of adjusting the length of the insertion space. The outer tube 111 is a cylindrical structure as a whole and the diameter is within 2cm, so as to control the overall volume of the insertion tube 11 not to be too large. A connecting surface is extended on one side of the outer side wall of the outer tube 111 to facilitate connection with the wearing part 2. The connecting surface can be a plane or an arc surface, so as to facilitate the wearing part 2 to be worn on the nasolabial part (i.e., the facial position between the nose and the lips). The first through hole 112 is opened along the axial direction of the outer cylinder 111, and extends inward at one end of the first through hole 112 to form a closing step 115. The closing step 115 is annular and has an inner diameter smaller than the inner diameter of the first through hole 112, and the inner diameter of the closing step 115 is smaller than the inner diameter of the inner cylinder 113. The diameter of the first through hole 112 is slightly larger than the outer diameter of the inner cylinder 113. The diameter difference between the outer diameters of the first through hole 112 and the inner cylinder 113 is about 1 mm, so that the inner cylinder 113 can be movably inserted into the first through hole 112. The inner cylinder 113 is a circular tubular structure and has a cylindrical second through hole 114 opened along the axial direction inside. When one end of the inner cylinder 113 is inserted into the first through hole 112, the second through hole 114 is connected to the first through hole 112, wherein the first through hole 112 and the second through hole 114 are combined and matched to form a penetration space. Since the outer tube 111 is connected to the wearing part 2 through the connecting surface, the overall length of the insertion tube 11 is adjusted by sliding the position of the inner tube 113 relative to the outer tube 111, so that the length of the insertion space changes. One end of the elastic expansion structure 12 is fixedly connected to the inner wall of the first through hole 112, and the other end of the elastic expansion structure 12 extends into the second through hole 114. In this way, when the inner tube 113 is moved to change the length of the insertion space, the end of the elastic expansion structure 12 away from the first through hole 112 can gradually pass through the insertion space when the insertion space is shortened and is used to open the nasal cavity. After that, when the inner tube 113 is slid toward the outside of the first through hole 112 to extend the insertion space, the end of the elastic expansion structure 12 away from the first through hole 112 can be gradually retracted into the insertion space where the second through hole 114 is located. The closing step 115 can prevent the inner tube 113 from excessively penetrating into the first through hole 112 when the content penetrates into the first through hole 112, thereby affecting the subsequent operation of the inner tube 113.

[0031] In the content defined in this embodiment, the sliding auxiliary structure 13 includes at least one sliding groove 131 opened on the end of the outer cylinder 111 away from the closing step 115 and a guide slider 132 fixedly connected to the outer wall of the inner cylinder 113 and adapted to the sliding groove 131. The sliding groove 131 is U-shaped and penetrates the inner and outer walls of the outer cylinder 111 along the radial direction of the first through hole 112, and the sliding groove 131 is located on the outer cylinder 111 outside the connection surface. The guide slider 132 is a rectangular block or columnar structure, and the thickness of the guide slider 132 is narrower than the width of the sliding groove 131 and can penetrate into the sliding groove 131. The guide slider 132 extends in the radial direction of the inner cylinder 113 so that the width of the guide slider 132 (i.e., the size of the guide slider 132 in the radial direction of the inner cylinder 113) is greater than the size of the sliding groove 131 in the radial direction of the outer cylinder 111. When the inner cylinder 113 is installed on the outer cylinder 111, the guide slider 132 and the sliding groove 131 are used to prevent slipping, and at the same time, the cooperation between the sliding groove 131 and the guide slider 132 is used to guide. In order to better promote the movement of the inner cylinder 113, an anti-slip block 133 is formed on the guide slider 132, and the anti-slip block 133 has uneven anti-slip patterns. When in use, the medical staff slides the inner cylinder 113 by pressing or pressing the anti-slip block 133. It should be noted that it is necessary to ensure that the existence of the anti-slip block 133 does not affect the cooperation between the guide slider 132 and the sliding groove 131, such as Figure 1 and Figure 2 The structure of the middle guide slider 132 and the anti-sliding block 133 is shown.

[0032] Please refer to Figure 7 In another embodiment, one end of the inner cylinder 113 is threadedly connected to the first through hole 112, and a guide slider 132 is also provided on the outer wall of the inner cylinder 113. However, the guide slider 132 in this embodiment is used to assist medical staff in rotating the inner cylinder 113 to adjust the length of the penetration cylinder 11.

[0033] In this embodiment, the elastic expansion structure 12 has an escape space 121 for the nasogastric tube to pass through, and the space is arranged coaxially with the insertion space, so that the nasogastric tube can pass through the escape space 121 after passing through the insertion space, and pass through the escape space 121 to pass into the nasal cavity after being stretched by the end of the elastic expansion structure 12. In the content defined in this embodiment, the elastic expansion structure 12 includes at least three elastic strips 122 arranged in a ring around the outer tube 111 in the circumferential direction in the insertion space, wherein the elastic strips 122 can be set to four or six, but the elastic expansion structure 12 should not be too many to avoid excessive pressure on the nasal cavity or too dense to affect the expansion and contraction between the elastic strips 122. The elastic strips 122 are arranged in the insertion space at equal intervals and surround the insertion space. Among them, the minimum dimension of the inner tube 113 of the insertion space in the direction parallel to each radial direction is greater than or equal to the outer diameter of the nasogastric tube, so that the nasogastric tube can pass through the escape space 121. Each elastic strip 122 is made of a hard elastic material such as plastic or metal, such as plastics such as polyvinyl chloride, or metals such as copper and stainless steel. Thus, even if the minimum size of the avoidance space 121 is smaller than the outer diameter of the nasogastric tube, due to its own elastic properties, when the nasogastric tube penetrates into the avoidance space 121 and squeezes each elastic strip 122, the nasogastric tube can pass through the avoidance space 121 through the squeezing between the nasogastric tube and the elastic strip 122. In this embodiment, one end of each elastic strip 122 is fixedly connected to the inner wall of the first through hole 112, and the closing step 115 as a part of the first through hole 112, and one end of each elastic strip 122 can also be fixedly connected to the end face of the closing step 115 along the axial direction close to the content. The other end of the elastic strip 122 is bent into the second through hole 114 and elastically abuts against the inner wall of the second through hole 114, wherein the end of the elastic strip 122 away from the first through hole 112 is squeezed and contracted by the inner wall of the second through hole 114 when located in the second through hole 114. When the inner cylinder 113 moves toward the first through hole 112 in the outer cylinder 111, the end of the elastic strip 122 away from the first through hole 112 gradually moves toward the outside of the penetration space where the second through hole 114 is located. Since the elastic strip 122 is gradually no longer squeezed by the inner wall of the second through hole 114, the bent elastic strip 122 rebounds radially toward the side away from the central axis and expands.

[0034] In this embodiment, each elastic strip 122 includes a connection end 1221 fixedly connected to the inner wall of the first through hole 112, a curved segment 1222 extending from the connection end 1221 axially toward the second through hole 114 and with a radially inward curved middle portion, and an expansion end 1223 extending from the curved segment 1222 toward a side away from the connection end 1221, the expansion end 1223 is radially outwardly curved at the middle portion in the axial direction to form an outer arch 12231, and each expansion end 1223 is distributed in an annular array to enclose a circular space. When the expansion end 1223 is not squeezed by the inner cylinder 113, that is, when the expansion end 1223 is not squeezed by the inner cylinder 113, the diameter of the circular space is greater than the inner diameter of the second through hole 114. The circular space is affected by the outer arch 12231 to form a structure with small diameters at both ends and large diameters in the middle in the axial direction, wherein both the minimum diameters at both ends and the maximum diameter formed by the outer arch 12231 are larger than the inner diameter of the second through hole 114. The inner cylinder 113 is sleeved on the outer side of each elastic strip 122, and the inner wall of the inner cylinder 113 restricts the elastic strip 122 to control the expansion end 1223 to close or open. In order to prevent the inner cylinder 113 from being affected by the connecting end 1221, the connecting end 1221 is fixedly connected to the closing step 115; and in the radial direction, a space is formed between the connecting end 1221 and the inner wall of the first through hole 112 outside the closing step 115 for the inner cylinder 113 to move through, and the width of the space is greater than or equal to the thickness of the content, and the expansion end 1223 is located outside the side away from the central axis relative to the connecting end 1221 in the radial direction without being squeezed by the inner cylinder 113, and the length of the inner cylinder 113 is less than the sum of the lengths of the curved segment 1222 and the connecting end 1221, so that the expansion end 1223 can pass through the penetration space when the inner cylinder 113 penetrates into the first through hole 112. Preferably, the length of the content is less than two-thirds of the overall length of the elastic strip 122.

[0035] In the initial state, one end of the inner tube 113 slides in the first through hole 112, and the expansion end 1223 is located in the second through hole 114 and pressed against the inner wall of the second through hole 114. At this time, the expansion end 1223 is squeezed by the second through hole 114 to elastically deform the end of the curved segment 1222 away from the first through hole 112 inwardly. When in use, after aligning the expansion end 1223 with the selected nasal cavity and bringing the inner tube 113 close to the nasal cavity, the inner tube 113 is slid toward the side of the first through hole 112. During the sliding process of the inner tube 113, the outer tube 111 is moved toward the side of the nasal cavity until the expansion end 1223 is squeezed into the nasal cavity. The structure of the outer arch 12231 guides the expansion end 1223 away from one end of the first through hole 112 and makes it easier to enter the nasal cavity, until the outer arch 12231 enters the nasal cavity and stops moving the outer tube 111, and then continues to slide the inner tube 113 toward the first through hole 112, until the outer arch 12231 is pressed against the nasal cavity through elastic contact with the inner wall of the nasal cavity. At this time, the nasal cavity opening is expanded by the expansion end 1223, and the curved outer arch 12231 restricts the expansion end 1223 to a certain extent in the nasal cavity and does not automatically leave the nasal cavity, thereby improving the overall stability. It should be noted that the pressure applied to the nasal cavity by the elastic rebound of the elastic strip 122 must be within its tolerance range, such as about 1000 Pa, so that the nasal cavity can be expanded without damaging the nasal cavity wall.

[0036] In another embodiment, the elastic expansion structure 12 includes at least three elastic strips 122 and support rods 123 corresponding to the elastic strips 122 fixedly connected to the inner wall of the first through hole 112. The structure of the elastic strips 122 is consistent with the elastic strips 122 of the previous embodiment and is respectively a swing end 1224, a curved segment 1222 and an expansion end 1223, wherein the structure of the swing end 1224 is consistent with the connection end 1221. The number and position of the support rods 123 correspond to the elastic strips 122 one by one to form a circular array arrangement, one end of the support rods 123 is fixedly connected to the side of the first through hole 112 away from the closing step 115, and the other end of the support rods 123 extends inward and is hinged to the curved segment 1222. A rotation groove is provided at the position where the curved segment 1222 is connected to the support plate, and the end of the support rod 123 is hinged to the curved segment 1222 by rotating a rotation shaft that penetrates the support rod 123 and the inner wall of the rotation groove, so that the two ends of the curved segment 1222 swing in opposite directions along the radial direction, thereby driving the swing end 1224 and the expansion end 1223 to swing in opposite directions. In order to prevent the support rod 123 from affecting the use of the inner cylinder 113, an avoidance groove 1131 is provided at the position corresponding to each support rod 123 on the end surface of the inner cylinder 113 radially facing the first through hole 112. The avoidance groove 1131 penetrates the inner and outer arms of the inner cylinder 113 along the radial direction of the inner cylinder 113 at the position, and the support rod 123 moves and penetrates into the avoidance groove 1131 along the axial direction. The width of the support rod 123, the rotation groove and the avoidance groove 1131 are all smaller than the width of the elastic strip 122. In order to prevent the inner cylinder 113 from directly separating from the outer cylinder 111, a blocking block can be set at the notch of each avoidance groove 1131 close to the first through hole 112, and the support rod 123 penetrates into the avoidance groove 1131 so that the inner cylinder 113 can pass through the restriction of the support rod 123 and will not separate from the outer cylinder 111.

[0037] In the initial state, the inner cylinder 113 does not contact the curved segment 1222 or lightly rests on the curved segment 1222, and the expansion end 1223 is now facing inward relative to the swing end 1224, and the expansion end 1223 is now outside the inner cylinder 113 and is in a retracted state; and the end of the swing end 1224 away from the curved segment 1222 faces outward relative to the expansion end 1223. There is a space between the end of the swing end 1224 away from the curved segment 1222 and the closing step 115 for the swing end 1224 to swing. When in use, first push the expansion end 1223 into the nasal cavity. Since the elastic strips 122 are not yet bound, when the nasal cavity is narrow, the expansion ends 1223 can be pinched inward until the expansion ends 1223 are retracted to a position where they can be inserted into the nasal cavity. After the expansion ends 1223 enter the nasal cavity, the inner cylinder 113 is moved toward the first through hole 112, and the inner cylinder 113 gradually squeezes the curved arc section 1222 close to the swing end 1224 to make the expansion ends 1223 swings outward until the expansion end 1223 presses against the nasal cavity, or the inner tube 113 is gradually squeezed to the swing end 1224 so that the expansion end 1223 continues to expand until it presses against the nasal cavity, and the expansion end 1223 is expanded by the lever principle to achieve the purpose of opening the nasal cavity; when the inner tube 113 is moved toward the side away from the first through hole 112, the expansion end 1223 is contracted by the inner tube 113 squeezing the curved arc segment 1222 in turn, so as to facilitate the removal of the expansion end 1223 from the nasal cavity.

[0038] In order to keep the inner tube 113 in the state after stretching the nasal opening, a pawl (not shown in the figure) bent toward the side away from the first through hole 112 can be provided on the inner tube 113, and a rack (not shown in the figure) with a ratchet engaged with the pawl is inserted on the outer tube 111 along its axial direction, and the tooth groove side of the rack faces the first through hole 112, and the rack is arranged along the axial direction. The pawl is made of elastic metal such as stainless steel and can be deformed. When the inner tube 113 slides toward the first through hole 112, the pawl is squeezed by the rack and deformed inward to pass through. After the pawl stops, it is engaged with the tooth groove of the rack and is limited. When it is necessary to contact the expanded state of the expansion end 1223, the rack can be pulled out along the axial direction.

[0039] In this embodiment, the wearing part 2 includes a first elastic band 21 for surrounding the nose and lips, a second elastic band 22 for surrounding the nose and having two ends connected to the two ends of the first elastic band 21 to form a connection, and a third elastic band 23 having one end connected to the two connections and the other end detachably connected, and the third elastic band 23 is used to surround the head. The outer tube 111 is connected to the first elastic band 21, and the first elastic band 21, the second elastic band 22 and the third elastic band 23 cooperate to restrict the outer tube 111 on the patient's face, and adjust the position of the outer tube 111 so that it can be aligned with any nasal cavity.

[0040] In this embodiment, the first elastic strip 21, the second elastic strip 22 and the third elastic strip 23 can all be selected from various elastic bands made of rubber, etc., and the two ends of the first elastic strip 21 and the second elastic strip 22 are respectively connected together to form two connection points. The two third elastic strips 23 are both wider than the first elastic strip 21 and the second elastic strip 22 to ensure that the third elastic strip 23 can fix the first elastic strip 21 and the second elastic strip 22 on the head. Velcro is respectively set on the ends of the two third elastic strips 23 away from the connection point to be detachably connected in an adhesive manner, or a plurality of buttons can be set on one of the third elastic strips 23, and a plurality of buttonholes can be opened on the other third elastic strip 23 to be detachably connected in the buckling direction. In this embodiment, a connecting plate 211 is fixedly connected to the first elastic strip 21, and the shape of the connecting plate 211 corresponds to the connection surface and can be flat or arc-shaped. A rivet groove and a rivet block 1111 matched with the rivet groove are respectively arranged on the side facing the connecting plate 211 and the connecting surface. The rivet block 1111 is arranged on the connecting plate 211. The rivet groove is connected along the axial direction of the outer tube 111 and is open toward the connecting surface. The outer tube 111 is detachably riveted to the connecting plate 211 along the axial direction by aligning the rivet block 1111 with the rivet groove and riveting them. Therefore, the outer tube 111 is disassembled before use to disinfect the entire auxiliary expansion part 1 and the auxiliary support part 3.

[0041] In this embodiment, the auxiliary support part 3 includes a rotating ring 31 coaxially rotatably connected to the end of the outer cylinder 111 away from the inner cylinder 113, a connecting block 32 fixedly connected to the outer side wall of the rotating ring 31, a connecting rod group 33 with one end hinged to the connecting block 32 and capable of rotational deformation, and a nose pad 34 rotatably connected to the other end of the connecting rod group 33 for supporting the nose tip. The rotating ring 31 is used to rotate the connecting rod group 33 and the nose pad 34 to the desired side as needed after the inner cylinder 113 is aligned with the selected nasal cavity. The connecting rod group 33 can adjust the relative position of the nose pad 34. As for the position of the nose tip, the nose pad 34 can cover the patient's nose tip, thereby providing further support for the outer tube 111 and making the outer tube 111 more stable. At the same time, since the nasogastric tube needs to be continuously inserted into the patient's body until the nasogastric tube reaches the stomach during use, the nasogastric tube will be continuously pushed toward one side of the nasal cavity during the insertion process. The nose pad 34 can prevent the auxiliary expansion part 1 from being pushed toward the nasal cavity during the process of pushing the nasogastric tube, and avoid the expansion end 1223 from excessively extending into the nasal cavity to cause unnecessary trouble.

[0042] In this embodiment, the rotating ring 31 is annular and has an outer diameter smaller than the inner cylinder 113 of the outer cylinder 111, and the inner diameter of the rotating ring 31 is the same as the diameter of the first through hole 112. The rotating ring 31 is coaxial with the outer cylinder 111 and is located on the side of the outer cylinder 111 away from the inner cylinder 113. A circular guide rail is convexly arranged on the end surface of the outer cylinder 111 facing the rotating ring 31 and is distributed circumferentially around the first through hole 112. The cross section of the guide rail is T-shaped and the side away from the outer cylinder 111 is a wide section, and the side of the guide rail close to the outer cylinder 111 is narrower than the wide section. A guide groove is formed on the side of the rotating ring 31 facing the outer cylinder 111 corresponding to the guide rail for sliding circumferentially around the first through hole 112. The guide groove is annular and has a T-shaped cross section adapted to the guide rail, so that the rotating ring 31 can rotate.

[0043] In this embodiment, the connecting rod group 33 includes a first connecting rod 331 and a second connecting rod 332. One end of the first connecting rod 331 is hinged to the connecting block 32, and the other end of the first connecting rod 331 is hinged to one end of the second connecting rod 332. A rotating head 333 is coaxially rotatably arranged on the other end of the second connecting rod 332, and the rotating head 333 is hinged to the nose pad 34. A first hinge groove can be provided on the connecting block 32, and a first hinge block is formed at the end of the first connecting rod 331. A groove body is provided on two opposite sides of the first hinge groove, and a cylindrical convex column is provided on the first hinge block corresponding to the two groove bodies, and the two convex columns are respectively inserted into the two groove bodies to realize hinge connection. The first hinge groove is connected along a direction parallel to the tangent between the connecting block 32 and the rotating ring 31 and connected along the axial direction of the outer cylinder 111 toward the inner cylinder 113. The first connecting rod 331 and the second connecting rod 332 are hinged in the same manner, so that when the wearing part 2 is worn on the face, the outer tube 111 is located on the side of the first elastic strip 21 away from the skin, and the end of the first connecting rod 331 away from the connecting block 32 and the two ends of the second connecting rod 332 can swing toward one side of the face or away from the side of the face. By rotating the first connecting rod 331 and the second connecting rod 332, the position of the nose pad 34 relative to the nose can be adjusted to ensure that the nose pad 34 is supported on the nose tip when used by different patients. It should be noted that for patients with prostheses filled in the nose tip or trauma on the outer surface of the nose, the nose pad 34 may not be supported on the nose tip to avoid adverse effects. When used, lightly pressing the outer tube 111 is used to limit the movement of the outer tube 111. In order to ensure the locking between the first connecting rod 331 and the connecting block 32 and the locking between the first connecting rod 331 and the second connecting rod 332, the boss can be replaced with a thumb screw, and the inner wall of the slot body is set as a corresponding screw hole. When the position of the nose pad 34 needs to be adjusted, the screw can be rotated to disengage from the corresponding hinge block. When it needs to be fixed, the screw can be rotated to the corresponding hinge block to lock it. The rotational connection between the rotating head 333 and the second connecting rod 332 is consistent with the rotation principle between the rotating ring 31 and the outer tube 111, which will not be repeated here.

[0044] In this embodiment, a second hinge block protrudes from the nose pad 34, and a second hinge groove is provided on the second hinge block. A rotating shaft protrudes from the rotating head 333 at the position corresponding to the second hinge groove and penetrates into the two second hinge grooves respectively, so as to realize the rotation of the nose pad 34, so that the nose pad 34 can be used for patients with different nose tip positions and supported on a nose tip of different patients according to the needs. In the content defined in this embodiment, the nose pad 34 is adapted to the shape of the nose tip of the human body, so that the overall shape of the nose pad 34 is similar to a triangular pyramid, and the surface of the nose pad 34 is streamlined and an arc surface, and a receiving groove 341 for the nose tip to penetrate therein is concavely provided on one side surface of the nose pad 34, and the shape of the receiving groove 341 is similar to the overall shape of the nose pad 34, so that it can cover the nose tip and prevent the nose pad 34 from slipping relative to the nose tip to a certain extent. In another embodiment, the nose pad 34 is in the shape of one-third of a sphere, and the receiving groove 341 is in the shape of an arc surface of one-third of a circle. The material of the nose pad 34 is silicone, which is not only non-slip but also relatively soft and does not hurt the skin.

[0045] The working method of one embodiment of the nasogastric feeding tube insertion auxiliary device of the present invention is as follows: the inner tube 113 is placed in the initial state, and when the patient's body is prepared in various aspects and the intubation is started, the first elastic strip 21 and the second elastic strip 22 are aligned with the nose and the nasolabial region, and then the two third elastic strips 23 are passed around the head and connected to be placed on the head, and the first elastic strip 21 is manually adjusted to cover the nasolabial region and the second elastic strip 22 is manually adjusted to cover the nose, and then the first elastic strip 21 and the second elastic strip 22 are moved to the same position. The belt 22 aligns the inner tube 113 with the selected unobstructed nasal cavity; after sliding the inner tube 113 toward the first through hole 112 and extending the expansion end 1223 into the nasal cavity and stretching the nasal cavity, a lubricant is applied to the end of the nasogastric tube, and the nasogastric tube coated with the lubricant is passed through the rotating ring 31 and the first through hole 112 in sequence and then enters the avoidance space 121 in the second through hole 114, and the nasogastric tube is continued to be pushed so that it can easily pass through the nasal opening stretched by the expansion end 1223 and then pass through the nasal cavity, the back, the esophagus and enter the stomach, thereby completing the intubation of the nasogastric tube.

Claims

1. A nasogastric feeding tube insertion auxiliary device, characterized in that: It includes an auxiliary opening part and a wearing part that allows the auxiliary opening part to be worn on the face and aligned with one of the nasal cavities, the auxiliary opening part includes a penetration tube connected to the wearing part and used for a nasofeeding tube to pass through it, and an elastic expansion structure located in the penetration tube and used for extending into the nasal cavity and elastically expanding, and the elastic expansion structure has an escape space for the nasofeeding tube to pass through.

2. The nasogastric feeding tube insertion auxiliary device according to claim 1, characterized in that: A penetration space with a retractable length and connected along the axial direction is formed in the penetration tube. The elastic expansion structure is located in the penetration space and one end of the structure gradually extends out of the penetration space and expands elastically when the penetration space is shortened. The avoidance space is arranged coaxially with the penetration space.

3. The nasogastric feeding tube insertion auxiliary device according to claim 2, characterized in that: The penetration tube includes an outer tube having a first through hole inside and an inner tube whose one end is coaxially slidably penetrated into the first through hole through a sliding auxiliary structure along the axial direction. The inner tube has a second through hole opened along the axial direction to connect with the first through hole. One end of the elastic expansion structure is fixedly connected to the inner wall of the first through hole and the other end extends into the second through hole. The first through hole and the second through hole are jointly configured as the penetration space.

4. The nasogastric feeding tube insertion auxiliary device according to claim 3, characterized in that: The elastic expansion structure includes at least three elastic strips which are arranged in a ring around the circumference of the outer tube in the penetration space to enclose an avoidance space, one end of the elastic strip is fixedly connected to the inner wall of the first through hole, and the other end of the elastic strip is bent into the second through hole and elastically pressed against the inner wall of the second through hole; when the inner tube slides toward the outer tube to shorten the penetration space, the end of the elastic strip away from the first through hole passes through the penetration space and moves radially toward the side away from the central axis.

5. The nasogastric feeding tube insertion auxiliary device according to claim 4, characterized in that: Each of the elastic strips includes a connecting end fixedly connected to the inner wall of the first through hole, an arc section extending axially from the connecting end toward the second through hole and with the middle portion radially curved inward, and an expansion end extending from the arc section toward a side away from the connecting end, the expansion end is radially curved outward at the middle portion where it is axially located to form an outer arch portion, and a circular space surrounded by each of the expansion ends has a diameter greater than the inner diameter of the second through hole when it extends out of the penetration space.

6. The nasogastric feeding tube insertion auxiliary device according to claim 3, characterized in that: The outer tube is connected with an auxiliary supporting part for supporting the nose tip when the wearing part is worn on the face.

7. The nasogastric feeding tube insertion auxiliary device according to claim 6, characterized in that: The auxiliary support part includes a rotating ring coaxially connected to the end of the outer tube away from the inner tube, a connecting block fixedly connected to the outer side wall of the rotating ring, a connecting rod group with one end hinged to the connecting block and capable of rotational deformation, and a nose pad rotatably connected to the other end of the connecting rod group for supporting the nose tip.

8. The nasogastric feeding tube insertion auxiliary device according to claim 7, characterized in that: The nose pad is adapted to the shape of the nose tip of the human body and is concavely provided with an accommodating groove for the nose tip to penetrate therein.

9. The nasogastric feeding tube insertion auxiliary device according to claim 3, characterized in that: The wearing part includes a first elastic strip for surrounding the nose and lips, a second elastic strip for surrounding the nose and having two ends respectively connected to the two ends of the first elastic strip to form a connection, and a third elastic strip having one end respectively connected to the two connections and the other end detachably connected, the outer tube is connected to the first elastic strip, and the third elastic strip is used to be surrounded on the head.

10. The nasogastric feeding tube insertion auxiliary device according to claim 9, characterized in that: A connecting plate is fixedly connected to the first elastic strip, and the outer cylinder is detachably riveted to the connecting plate along the axial direction.

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