Venipuncture auxiliary device for edema patient

Abstract

The invention discloses a venipuncture auxiliary device for an edema patient, and belongs to the field of medical instruments, the venipuncture auxiliary device comprises a pushing part, the pushing part comprises a pushing-away arm and a driving arm, the pushing-away arm is connected with the driving arm, the pushing-away arm is provided with a matching channel in a penetrating mode, and the pushing-away arm is movably arranged in the matching channel of the other pushing-away arm and can move to an initial position; the pushing arms are connected into a ring and form a surrounding structure, and the surrounding area of the surrounding structure is zero when the pushing arms are located at the initial positions. The positioning frame is provided with a placement cavity in a penetrating manner, and the pushing arm is arranged in the placement cavity; a plurality of driving channels are arranged on the positioning frame in an annular array, and the driving arms are movably arranged in the driving channels; the driving arms drive the pushing arms to break away from the initial position when deviating from each other along the driving channel, and the surrounding area of the surrounding structure is larger than zero when the pushing arms break away from the initial position. By means of the arrangement, subcutaneous edema can be outwards pushed away from the selected puncture position of the body surface of a patient in a spread mode.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a venous puncture auxiliary device for edema patients. Background Art

[0002] Nephrotic edema is water and sodium retention due to kidney disease. Edema first occurs in loose tissue parts of the body, such as eyelids and face, and then gradually develops to the ankles and lower limbs. In severe cases, it can affect the whole body, and even pleural effusion and ascites may occur. It is a common clinical symptom in patients with kidney disease. Due to excessive fluid intake or hypoproteinemia, patients with renal edema will have fluid retention in the interstitial space, resulting in unclear peripheral blood vessels of patients, which are difficult to distinguish with the naked eye, bringing great difficulties to clinical blood collection and intravenous infusion treatment. At present, in clinical practice, for patients with severe renal edema, the success rate of puncture in one time for junior nurses is 0, and the success rate of puncture in one time for senior nurses ranges from 0 to 50%. It takes multiple nurses to puncture multiple times to have a chance of successful puncture. Multiple puncture failures bring great pain and psychological pressure to patients, and also consume the energy and time of nursing staff, bringing inconvenience to clinical work.

[0003] Therefore, a device is designed that can push subcutaneous edema outwards with a selected puncture position as the center. This device is specifically a venous puncture auxiliary device for edema patients. Summary of the invention

[0004] In order to overcome the problems raised in the background technology, the present invention adopts the following technical solutions:

[0005] A venous puncture auxiliary device for patients with edema, comprising: a pushing member, comprising a pushing arm and a driving arm, the pushing arm is connected to the driving arm, the pushing arm is provided with a matching channel running through it, the pushing arm is movably arranged in the matching channel of another pushing arm and can move to an initial position, a plurality of the pushing arms are connected into a ring and form a surrounding structure, and the surrounding area of ​​the surrounding structure is zero when the pushing arm is in the initial position; a positioning frame is provided with a placement cavity running through it, the pushing arm is arranged inside the placement cavity; a plurality of driving channels are provided on the positioning frame in a ring array, the driving arm is movably arranged in the driving channel; the driving arms drive the pushing arms to leave the initial position when they depart from each other along the driving channel, and the surrounding area of ​​the surrounding structure is greater than zero when the pushing arms leave the initial position.

[0006] When in use, the device is fixed at the puncture site of the skin, and the pushing arm is controlled to have contact pressure with the punctured skin. Then, multiple pushing arms are controlled to move relative to each other along the matching channel at the same time, so that the surrounding structure is separated from the initial position. At the same time, the surrounding area gradually increases until a surrounding cavity that can effectively implement puncture is formed. During the movement of the surrounding structure, contact pressure is generated outward on the patient's skin, pushing the patient's subcutaneous edema away to the outside of the surrounding structure.

[0007] Furthermore, the pushing arm includes a joint part and a pushing part, and the matching channel passes through the joint part along a direction, the joint part has a joint inner wall and a joint outer wall, and the pushing part has a pushing outer wall and a pushing inner wall. When the pushing arm is in an initial position, the joint inner walls of adjacent joint parts abut against each other, and the pushing inner wall and the pushing outer wall are not subjected to force; when the driving arm drives the pushing arm to leave the initial position, the joint inner walls of adjacent joint parts move away from each other, and the pushing part moves toward the direction of leaving the joint part, so that the surrounding area of ​​each pushing member is increased, and a surrounding channel can also be formed between the pushing members. The inner walls of the surrounding channel are the joint inner walls and the pushing inner walls of adjacent pushing arms, and at the same time, the pushing outer wall pushes the patient's subcutaneous edema outward, thereby reducing the edema thickness in the target area and creating suitable puncture conditions for medical staff.

[0008] Furthermore, the positioning frame includes a plurality of limit blocks, which are distributed in a circular array, each of the limit blocks is penetrated by a drive channel, each of the drive channels penetrates at least two limit blocks, the number of the limit blocks is twice the number of the pushing members, and the limit blocks limit the movement of the drive arm away from the bottom end of the positioning frame.

[0009] Furthermore, a rack is provided on the driving arm, and the rack faces the positioning frame when the driving arm passes through the driving channel. A gear is provided between the two limit blocks through which each driving channel passes, and the gear is pivotally connected to the positioning frame around an axis. The gear is meshed with the rack, and the gear and the rack limit the radial movement of the driving arm. When the gear rotates, it drives the driving arm to reciprocate in the driving channel, thereby driving the pushing arms to approach or move away from each other. When any driving arm moves, adjacent pushing members operate in an interlocking manner and the surrounding area increases or decreases.

[0010] Furthermore, the positioning frame has a lower end surface one, and the pushing arm has a lower end surface two. Along the direction of the driving arm perpendicular to the lower end surface one, the height of the lower end surface two is not less than the height of the lower end surface one, so that the pushing arm contacts the patient's skin before the positioning frame, and the positioning frame can contact the patient's skin only after the lower end of the pushing arm squeezes the patient's skin at the contact position. Therefore, after the positioning frame is fixed, the pressure on the part of the edema under the pushing arm is greater than the pressure on the part of the edema under the positioning frame, thereby preventing edema from accumulating between the pushing arm and the positioning frame when the pushing arms move away from each other.

[0011] Furthermore, the central axis of the mating channel and the central axis of the pushing portion have an angle, the number of pushing members constituting the surrounding structure is a and a>3, the degree of the angle is 180°-360° / a, and the number of pushing members is the same as the number of driving channels.

[0012] Furthermore, a plurality of pull rings are provided on the outer wall of the positioning frame, and the number of the pull rings is not less than four. The pull rings are used to connect to a fixing belt fixed to the patient's body surface. One end of the fixing belt is connected to the pull ring, and the other end is used to connect to the pull ring on the opposite side or another fixing belt. The connection position and number of the fixing belts are adjusted according to the specific position of the positioning frame on the patient's body surface.

[0013] Furthermore, at least one of the gears is connected to a motor.

[0014] Furthermore, when the pushing arm is in the initial position, it abuts against the inner wall of the placement cavity, so that adjacent pushing arms abut against each other under the reaction force of the placement cavity, which is conducive to preventing the pushing arms from detaching from each other when not in use, and preventing edema from remaining in the target area from the gaps between the pushing arms when the pushing arms contact the patient.

[0015] Furthermore, the longest distance between any two points on the pushing arm is not greater than the inner diameter of the placement cavity.

[0016] Furthermore, the pushing arm can move to a terminal position. When the pushing arm is at the terminal position, the outer wall of the joint abuts against the inner wall of the placement cavity, and the surrounding area of ​​the joint arm reaches a maximum value.

[0017] Furthermore, the vertical distance from the lower end surface to the top of the placement cavity is at least 50 mm.

[0018] Beneficial effects of the present invention:

[0019] 1. By providing a joint part with a matching channel and a pushing part connecting the joint part, the two pushing arms can be slidably combined, and the central axis of the matching channel and the central axis of the pushing part have an angle, so that multiple pushing arms can be connected into a ring, and when any one of the multiple pushing arms forming a closed loop moves relative to the adjacent pushing arm, the surrounding area of ​​the surrounding structure formed by the multiple pushing arms will change. Therefore, when the surrounding structure is attached to the edematous part of the patient's body surface, the surrounding area of ​​the surrounding structure can be increased by driving the adjacent pushing arms away from each other; and in the process of the adjacent pushing arms moving away from each other, the outer wall of the joint and the pushing outer wall on the outside of the surrounding structure continuously drive the subcutaneous edema away from the puncture area, thereby providing medical staff with a puncture area where the subcutaneous edema is discharged, so it has excellent practical effects. Compared with the current treatment method of medical staff manually displacing subcutaneous edema, the surrounding structure can diffuse and drive away subcutaneous edema in all directions without having to consider the problem of resetting the edema contents during the puncture process. It can greatly shorten the puncture operation time and avoid puncture failure caused by edema, greatly reducing the physical damage and psychological pressure on patients.

[0020] 2. By providing a positioning frame with a placement cavity, the surrounding structure can be fixed in the area to be punctured, and the setting of the placement cavity is conducive to limiting the movement space of subcutaneous edema when the surrounding structure moves; by providing a limit block with a driving channel and a gear connected to the motor on the positioning frame, the movement frequency of the surrounding structure is kept constant, thereby reducing the discomfort caused to the patient when the pushing arm drives away the subcutaneous edema. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention when the push arm is in the initial position;

[0023] Figure 2 for Figure 1 A schematic diagram of a cross-sectional structure;

[0024] Figure 3 for Figure 1 A structural schematic diagram of a middle surround structure;

[0025] Figure 4 A schematic diagram of the overall structure of a pusher;

[0026] Figure 5 A schematic diagram of the overall structure of a pusher;

[0027] Figure 6 It is a schematic diagram of the overall structure of the positioning frame;

[0028] Figure 7 for Figure 6 A schematic diagram of a cross-sectional structure;

[0029] Figure 8 It is a schematic diagram of the overall structure of the present invention when the push arm is in the initial position;

[0030] Fig. 9 It is a schematic diagram of the overall structure of the present invention when the push arm is in the terminal position;

[0031] Fig.10 for Fig. 9 A schematic diagram of a structure of a surround structure;

[0032] Fig.11 for Fig. 9 A schematic diagram of a cross-sectional structure;

[0033] Fig.12 It is a schematic diagram of the overall structure of the present invention when the push arm is in the terminal position;

[0034] Fig.13 It is a schematic diagram of the overall structure of the present invention when the driving arm passes through the positioning frame and the pushing arm is in the initial position;

[0035] Fig.14 for Fig.13 A schematic cross-sectional structure diagram of ;

[0036] Fig.15 A schematic diagram of a cross-sectional structure of the present invention when the push arm moves to the end position;

[0037] In the figure, 10, surrounding structure; 1, pushing member; 11, pushing arm; 111, matching channel; 112, joint part; 1121, joint inner wall; 1122, joint outer wall; 113, pushing part; 1131, pushing inner wall; 1132, pushing outer wall; 114, lower end surface two; 115, direction one; 12, driving arm; 121, rack; 2, positioning frame; 21, placement cavity; 22, limit block; 221, driving channel; 222, gear; 223, motor; 23, lower end surface one; 24, pull ring. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention are described clearly and completely below through specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] A venous puncture assisting device for patients with edema, such as Figure 1-12As shown, it includes: a pushing member 1, including a pushing arm 11 and a driving arm 12, the pushing arm 11 is connected to the driving arm 12, the pushing arm 11 is provided with a matching channel 111, the pushing arm 11 is movably arranged in the matching channel 111 of another pushing arm 11 and can move to an initial position, a plurality of pushing arms 11 are connected into a ring and form a surrounding structure 10, and the surrounding area of ​​the surrounding structure 10 is zero when the pushing arm 11 is in the initial position; a positioning frame 2, provided with a placement cavity 21, the pushing arm 11 is arranged inside the placement cavity 21; a plurality of driving channels 221 are provided in a ring array on the positioning frame 2, and the driving arm 12 is movably arranged in the driving channel 221; when the driving arms 12 depart from each other along the driving channel 221, they drive the pushing arms 11 to leave the initial position, and when the pushing arms 11 leave the initial position, the surrounding area of ​​the surrounding structure 10 is greater than zero.

[0040] In some embodiments of the present application, Figure 1-12 As shown, the push arm 11 includes a joint portion 112 and a pushing portion 113, the matching channel 111 penetrates the joint portion 112 along a direction 115, the joint portion 112 has a joint inner wall 1121 and a joint outer wall 1122, the pushing portion 113 has a pushing outer wall 1132 and a pushing inner wall 1131, when the push arm 11 is in the initial position, the joint inner walls 1121 of adjacent joint portions 112 abut against each other, and the pushing inner wall 1131 and the pushing outer wall 1132 are not subjected to force; the driving arm 12 drives the push arm 11 When leaving the initial position, the joint inner walls 1121 of adjacent joint parts 112 move away from each other, and the pushing part 113 moves toward the direction of leaving the joint part 112, so that the surrounding area of ​​each pushing member 1 is increased, and a surrounding channel can also be formed between the pushing members 1. The inner wall of the surrounding channel is the joint inner wall 1121 and the pushing inner wall 1131 of the adjacent pushing arm 11. At the same time, the pushing outer wall 1132 pushes the patient's subcutaneous edema outward, thereby reducing the edema thickness in the target area and creating suitable puncture conditions for medical staff.

[0041] In some embodiments of the present application, Figure 1-12 As shown, the positioning frame 2 includes a plurality of limit blocks 22, which are distributed in a circular array. Each limit block 22 is penetrated by a driving channel 221, and each driving channel 221 penetrates at least two limit blocks 22. The number of limit blocks 22 is twice the number of pushers 1. The limit blocks 22 limit the movement of the driving arm 12 away from the bottom end of the positioning frame 2.

[0042] In some embodiments of the present application, Figure 1-12As shown, a rack 121 is provided on the driving arm 12, and the rack 121 faces the positioning frame 2 when the driving arm 12 passes through the driving channel 221. A gear 222 is provided between the two limit blocks 22 through which each driving channel 221 passes, and the gear 222 is pivotally connected to the positioning frame 2 around an axis. The gear 222 is meshed with the rack 121, and the gear 222 and the rack 121 limit the radial movement of the driving arm 12. When the gear 222 rotates, it drives the driving arm 12 to reciprocate in the driving channel 221, thereby driving the pushing arms 11 to approach or move away from each other. When any driving arm 12 moves, the adjacent pushing members 1 operate in an interlocking manner and the surrounding area is increased or reduced.

[0043] In some embodiments of the present application, Figure 1-12 As shown, the positioning frame 2 has a lower end surface 23, and the pushing arm 11 has a lower end surface 214. The height of the lower end surface 214 is not less than the height of the lower end surface 23 along the direction perpendicular to the driving arm 12 toward the lower end surface 23, so that the pushing arm 11 contacts the patient's skin before the positioning frame 2, and the positioning frame 2 can contact the patient's skin only after the lower end of the pushing arm 11 squeezes the patient's skin at the contact position, so that after the positioning frame 2 is fixed, the pressure on the part of the edema located under the pushing arm 11 is greater than the pressure on the part of the edema located under the positioning frame 2, which is conducive to the subcutaneous edema accumulated in the placement cavity 21 during the movement of the pushing arm 11 from the initial position to the terminal position to pass through the bottom end of the positioning frame 2 and diffuse outward, and can prevent the edema from accumulating excessively between the pushing arm 11 and the placement cavity 21 when the pushing arms 11 move away from each other and cause discomfort to the patient. The lower end surface 1 23 of the positioning frame 2 is provided with multiple rounded corners, and the lower end surface 2 114 of the pushing arm 11 is also provided with multiple rounded corners, which is beneficial to reduce the risk of cutting the patient's skin when the surrounding structure 10 moves.

[0044] In some embodiments of the present application, Figure 1-12 As shown, the central axis of the matching channel 111 and the central axis of the pushing portion 113 have an angle, the number of pushing members 1 constituting the surrounding structure 10 is a and a>3, the degree of the angle is 180°-360° / a, and the number of pushing members 1 is the same as the number of driving channels 221. When adjacent pushing members 1 are connected to form a closed loop, the contour of the surrounding area formed by the surrounding structure 10 when the pushing arm 11 reaches the terminal position is approximately a regular polygon, and each pushing arm 11 has the same displacement from the initial position to the terminal position, thereby ensuring that each pushing arm 11 has the same vertical distance to the puncture position, which makes the pressure exerted on the skin at the contact point by each pushing arm 11 that pushes away the subcutaneous edema when the surrounding structure 10 expands the same, so that the skin is evenly stressed in all directions, which is conducive to optimizing the patient experience.

[0045] In some embodiments of the present application, Figure 1-12As shown, a plurality of pull rings 24 are provided on the outer wall of the positioning frame 2, and the number of the pull rings 24 is not less than four. The pull rings 24 are used to connect to a fixing belt fixed to the patient's body surface. One end of the fixing belt is connected to the pull ring 24, and the other end is used to connect to the pull ring 24 on the opposite side or another fixing belt. The connection position and the number of connections of the fixing belt are adjusted according to the specific position of the positioning frame 2 placed on the patient's body surface.

[0046] In some embodiments of the present application, Figure 1-12 As shown, at least one gear 222 is connected to a motor 223. When the push arm 11 is in the initial position, it abuts against the inner wall of the placement cavity 21, so that adjacent push arms 11 abut against each other under the reaction force of the placement cavity 21, which is conducive to preventing the push arms 11 from being separated from each other when not in use, so as to prevent edema from remaining in the target area from the gap between the push arms 11 when the push arms 11 contact the patient. The push arm 11 can move to a terminal position. When the push arm 11 is in the terminal position, the joint outer wall 1122 abuts against the inner wall of the placement cavity 21. At this time, the surrounding area of ​​the joint arm reaches the maximum value. The inner wall of the placement groove and the push inner wall 1131 can limit the movement of the push arm 11 between the initial position and the terminal position during the movement of the push arm 11, thereby providing a hard limit for the movement of the push arm 11.

[0047] In some embodiments of the present application, the longest distance between any two points on the push arm 11 is not greater than the inner diameter of the placement cavity 21, so as to ensure that the push arm 11 can move in the placement cavity 21. Alternatively, a plurality of through holes are provided on the outer wall of the positioning frame 2, and the arrangement position of the through holes does not coincide with the joint outer wall 1122 when the push arm 11 reaches the terminal position, and is only used to allow the push portion 113 of the push arm 11 to pass through, and at the same time, the through holes are also conducive to the rapid movement of subcutaneous edema and to preventing skin from being squeezed and damaged.

[0048] In some embodiments of the present application, Figure 1-12 As shown, the vertical distance from the lower end surface 23 to the top of the placement cavity 21 is at least 50 mm. Subcutaneous edema will cause the patient's skin to float outward to a certain height than in a healthy state, and the purpose of squeezing and expanding the surrounding structure 10 is to remove the subcutaneous edema in the puncture area and restore the skin to a normal height. The purpose of setting the vertical distance is: when the positioning frame 2 and the surrounding structure 10 are pressed against the edematous part of the patient's body surface, a space sufficient to temporarily accommodate the subcutaneous edema that is expelled outward from the puncture area is provided, thereby preventing the loose skin containing subcutaneous fat from being squeezed and damaged in the placement cavity 21 during the pushing process.

[0049] In other embodiments of the present application, Figure 13-15As shown, the driving arm 12 is not arranged on the top of the push arm 11, but on the joint outer wall 1122 of the joint part 112, which makes the vertical height of the device further reduced when it is placed on the patient's body surface, which is conducive to avoiding the interference of the driving arm 12 with the operating position of the puncture instrument during the puncture operation, and can also prevent the driving arm 12 from blocking the operator's field of vision. In this scheme, no limit block 22 is provided, the driving channel 221 directly passes through the positioning frame 2 and the gear 222 is provided in the driving channel 221, the number of driving channels 221 is the same as the number of pushing arms 11, and each driving arm 12 is correspondingly slidably sleeved in a driving channel 221. When the pushing arm 11 is in the initial position, the driving arm 12 is meshed with the gear 222 towards the rack 121 provided on the outer wall at the bottom of the positioning frame 2; when the pushing arm 11 moves to the end position, the rack 121 provided on the outer wall at the bottom of the positioning frame 2 is still meshed with the gear 222. Therefore, compared with other embodiments, the driving arm 12 in this embodiment will never block the user's field of vision during the process of pushing away subcutaneous edema and skin puncture, and is also beneficial to improving the stability when stored alone or stacked in a non-use state.

Claims

1. A venous puncture assisting device for edema patients, characterized in that: include, A plurality of push-open arms, each of which has a matching channel extending therethrough; There are multiple driving arms, each of which is connected to a driving arm. The driving arm and the pushing arm are connected to form a pushing member, and the driving arm drives the pushing arm when it moves; The push arm is arranged to move in the matching channel of another push arm, and when the multiple push arms move along the matching channel, a closed surrounding structure with a changing surrounding area is formed, and the push arm has an initial position. When the push arm is in the initial position, the surrounding area of ​​the surrounding structure is zero, and after the driving arm drives the push arm to leave the initial position, the outer contour of the surrounding structure continues to increase; The positioning frame is provided with a placement cavity through it, and the push arm is arranged inside the placement cavity; the positioning frame is provided with a plurality of drive channels in a circular array, and the drive arm is arranged to move in the drive channels; When the driving arms move away from each other along the driving channel, the pushing arms are driven to leave the initial position.

2. A venous puncture assisting device for edema patients according to claim 1, characterized in that: The pushing arm includes a joint part and a pushing part, the matching channel passes through the joint part along direction 115, the joint part has a joint inner wall and a joint outer wall, when the pushing arm is in an initial position, the joint inner walls of adjacent joint parts abut against each other; when the driving arm drives the pushing arm to leave the initial position, the joint inner walls of adjacent joint parts move away from each other, and the pushing part moves in the direction of leaving the joint part.

3. A venous puncture assisting device for edema patients according to claim 1, characterized in that: The positioning frame includes a plurality of limit blocks, which are distributed in a circular array, each of which is penetrated by a driving channel, each of which is penetrated by at least two limit blocks, and the number of the limit blocks is at least twice the number of the driving arms.

4. A venous puncture assisting device for edema patients according to claim 3, characterized in that: A rack is provided on the driving arm, and the rack faces the positioning frame when the driving arm passes through the driving channel. A gear is provided between two limit blocks through which each driving channel passes, and the gear is pivotally connected to the positioning frame around an axis. The gear is meshed with the rack, and the gear and the rack limit the radial movement of the driving arm. When the gear rotates, it drives the driving arm to reciprocate in the driving channel.

5. The venous puncture assisting device for edema patients according to claim 1, characterized in that: The positioning frame has a lower end surface one, and the push arm has a lower end surface two. Along the direction of the driving arm perpendicular to the lower end surface one, the height of the lower end surface two is not less than the height of the lower end surface one.

6. A venous puncture assisting device for edema patients according to claim 2, characterized in that: The central axis of the matching channel and the central axis of the pushing portion have an angle, the number of pushing members constituting the surrounding structure is a, the degree of the angle is 180°-360° / a, and the number of pushing members is the same as the number of driving channels.

7. A venous puncture assisting device for edema patients according to claim 1, characterized in that: A plurality of pull rings are arranged on the outer wall of the positioning frame, and the number of the pull rings is not less than four.

8. The venous puncture assisting device for edema patients according to claim 4, characterized in that: At least one of the gears is connected to a motor.

9. The venous puncture assisting device for edema patients according to claim 1, characterized in that: When the push-open arms are in the initial position, they abut against the inner wall of the placement cavity, so that adjacent push-open arms abut against each other under the reaction force of the placement cavity.

10. The venous puncture assisting device for edema patients according to claim 1, characterized in that: The longest distance between any two points on the pushing arm is not greater than the inner diameter of the placement cavity.

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