A central venous catheter placement position-assisting device

Abstract

This utility model relates to a central venous catheterization positioning aid, comprising two opposing bases, a positioning frame mounted on the bases, a movable seat slidably mounted on the positioning frame, a first drive unit for driving the movable seat up and down, a leg support assembly mounted on the movable seat for supporting the patient, a spacing adjustment module for adjusting the distance between the two bases, and a positioning component for positioning the bases on the hospital bed; the leg support assembly includes a C-shaped base for supporting the patient's lower limbs and fasteners for fixing the patient's lower limbs to the C-shaped base; in use, the patient's knees are placed in the inner cavity of the C-shaped base and fixed by the fasteners, and the patient's feet are brought together so that the patient's two lower limbs are approximately in a rhombus shape from a top-down perspective. The position and height of the knees are adjusted by the first drive unit, and the distance between the two bases is adjusted by the spacing adjustment module to achieve the distance adjustment of the two knees. After adjustment, the lower limbs can be fixed in a preset position.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a central venous catheterization position-assisting device. Background Technology

[0002] Deep vein catheterization is necessary in several situations, including: rapid volume resuscitation; needing emergency intravenous access but unable to be achieved via peripheral vein catheterization; use of corrosive medications; needing indwelling dialysis catheters for hemodialysis, plasma exchange, etc.; chemotherapy; inability to perform peripheral vein catheterization for various reasons; and simultaneous multi-lumen injection of several incompatible drugs. Femoral vein catheterization is a commonly used method. The femoral vein is located within the femoral sheath in the femoral triangle, in a relatively constant position below the inguinal ligament, approximately 0.5 cm medial to the femoral artery. During the procedure, the patient should be supine with the buttocks slightly elevated, the knee of the affected limb slightly flexed, and the hip extended, slightly externally rotated and abducted 25°–30°. Under aseptic conditions, the operator uses the index and middle fingers of their left hand to locate the most prominent pulsation of the femoral artery to determine the position and course of the femoral vein (parallel to the line connecting the index and middle fingers). Generally, the puncture point is selected 2 cm below the inguinal ligament and 0.5 cm medial to the point where the most prominent pulsation of the femoral artery is felt.

[0003] During the puncture procedure, patient positioning is crucial. Throughout the femoral vein puncture, the patient must maintain an externally rotated and abducted position of the operated limb. On one hand, this external rotation and abduction leaves the knee joint suspended in the air, which can lead to fatigue and numbness over time. On the other hand, it is difficult for elderly, obese, or unconscious patients to maintain this position. Currently, this is typically achieved by placing a surgical drape under the knee of the operated limb or by manually pressing on the limb. However, the position of the surgical drape cannot be completely fixed, and even placing it underneath cannot guarantee prolonged positional stability. Manually pressing on the limb is wasteful of manpower. Therefore, there is an urgent need for a device to stabilize the operated limb during femoral vein puncture. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a central venous catheterization positioning aid that can effectively solve the aforementioned problems.

[0005] To achieve the above requirements, the technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A central venous catheter placement positioning aid is provided. The device includes two bases facing each other, a positioning frame mounted on the bases, a movable seat slidably mounted on the positioning frame, a first drive unit for driving the movable seat to move up and down, a leg support assembly mounted on the movable seat for supporting the patient, a spacing adjustment module for adjusting the distance between the two bases, and a positioning component for positioning the bases on a hospital bed. The leg support assembly includes a C-shaped base for supporting the patient's lower limbs and fasteners for fixing the patient's lower limbs to the C-shaped base.

[0007] The central venous catheter placement auxiliary positioning device of this utility model has a T-shaped base, with the longitudinal ends of the two bases facing each other and coaxial.

[0008] The central venous catheter placement auxiliary positioning device of this utility model includes a positioning frame that is a columnar structure and is vertically fixed to the connection parts at both ends of the base. The positioning frame has an axially movable cavity inside, and the first driving unit is located in the movable cavity.

[0009] The central venous catheter placement auxiliary positioning device of this utility model has an axially provided movable opening on the side wall of the positioning frame that penetrates the movable cavity, and the movable seat is fixedly connected to the movable terminal of the first drive unit through a connector that penetrates the movable opening.

[0010] The central venous catheter placement auxiliary positioning device of this utility model includes a positioning frame with a cylindrical structure, an arc-shaped groove on the side wall of the movable seat that is adapted to the side wall of the positioning frame, and a connector located in the middle of the ground of the arc-shaped groove.

[0011] The central venous catheter placement auxiliary positioning device of this utility model includes a spacing adjustment module comprising an adjustment shaft arranged in the left-right direction, and an adjustment cavity for axial movement of the adjustment shaft axially recessed on the longitudinal end face of the base; the spacing adjustment module further includes a second driving unit for driving the adjustment shaft and the longitudinal end to move axially relative to each other, the second driving unit being disposed in the adjustment cavity.

[0012] The central venous catheter placement auxiliary positioning device of this utility model has a square longitudinal section for the adjusting shaft, and the upper surface of the adjusting shaft is provided with an adjusting scale line along the axial direction.

[0013] The central venous catheter placement auxiliary positioning device of this utility model, wherein the first drive unit and the second drive unit are any one of a lead screw motor module, a linear motor module, and an axial motor module.

[0014] The central venous catheter placement position-assisted positioning device of this utility model includes a positioning component comprising a slot and a horizontal movable arm. The slot and the movable arm are respectively located on the left and right sides of the base. There are two movable arms, both arranged in the front-back direction. The adjacent ends of the two movable arms are horizontally damped and rotatably connected to the base.

[0015] The central venous catheter placement positioning device of this utility model includes a C-shaped base that is detachably connected to the movable seat with its opening facing upwards. The fastener is a strap with one end fixedly connected to one end of the C-shaped base and the other end detachably connected to the other end of the C-shaped base.

[0016] The beneficial effects of this utility model are as follows: In use, the patient's knee is placed in the inner cavity of the C-shaped base and fixed with fasteners. Then, the patient's feet are brought together so that the patient's two lower limbs are approximately in a rhombus shape from a top-down perspective. The knee position height is further adjusted by the first drive unit, and the distance between the two bases is adjusted by the distance adjustment module to achieve the distance adjustment between the two knees. After adjustment, the knee can be fixed at the preset height position, thereby maintaining the angle between the thigh and groin, which is convenient for doctors to operate. Compared with the traditional method of manual assisted positioning of the patient's lower limbs by multiple medical staff, this solution can greatly reduce the burden on medical staff. Moreover, after positioning adjustment, it avoids the disadvantage of unstable positioning when using towels or other pads. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an aerial view of the central venous catheter placement auxiliary positioning device of this utility model.

[0019] Figure 2 This is a partial structural diagram of the central venous catheter placement auxiliary positioning device of this utility model.

[0020] Figure 3 This is a partial structural diagram of the central venous catheter placement auxiliary positioning device of this utility model.

[0021] Figure 4 This is a longitudinal sectional view of the central venous catheter placement auxiliary positioning device of this utility model along the left and right direction.

[0022] Figure 5 yes Figure 4Enlarged view of a local structure.

[0023] Figure 6 yes Figure 4 Enlarged view of a local structure. Detailed Implementation

[0024] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0025] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0027] Furthermore, the terms indicating orientation, such as "up," "down," "left," "right," "upper end," "lower end," and "longitudinal," are all based on the posture and position of the device or equipment described in this solution during normal use.

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] The preferred embodiment of this utility model is a central venous catheter placement position-assisting device, such as... Figure 1-6As shown, the device includes two opposing bases 10, a positioning frame 20 mounted on the base 10, a movable seat 30 slidably mounted on the positioning frame 20, a first drive unit 40 for driving the movable seat 30 up and down, a leg support assembly 50 mounted on the movable seat 30 for supporting the patient's lower limbs, a spacing adjustment module 60 for adjusting the distance between the two bases 10, and a positioning assembly 70 for positioning the base 10 on the hospital bed. The leg support assembly 50 includes a C-shaped base 51 for supporting the patient's lower limbs and fasteners 52 for fixing the patient's lower limbs to the C-shaped base 51. The fasteners 52 can be adhesive straps, straps with Velcro, or ordinary ropes. Furthermore, the C-shaped base 51 is horizontally fixed to the movable terminal 43 of the first drive unit 40 by bolts 510 on its inner side, so as to facilitate the installation and removal of the C-shaped base 51.

[0030] Before use, adjust the distance between the two bases 10 to a suitable level. Then, place the entire device on the patient's bed and position the two bases 10 on either side of the patient's knees, ensuring they are stable. During use, place the patient's knees inside the C-shaped base 51 and secure them with fasteners 52. Then, bring the patient's feet together so that the patient's lower limbs form an approximate rhombus shape from a top-down view. Further adjust the knee height using the first drive unit 40 and adjust the distance between the two bases 10 using the spacing adjustment module 60 to achieve the distance adjustment between the two knees. After adjustment, fix the knees at the preset height. At this point, the positioning component 70 further positions the device on the bed, maintaining the angle between the thigh and groin, facilitating the doctor's operation. Compared to the traditional method of manually positioning the patient's lower limbs with the assistance of multiple medical staff, this solution greatly reduces the burden on medical staff. Moreover, after positioning adjustment, it avoids the instability caused by using towels or other padding materials for positioning.

[0031] In this embodiment, the base 10 is T-shaped, with the longitudinal ends 11 of the two bases 10 facing each other and coaxial from left to right. Specifically, the longitudinal sections of both the horizontal and vertical ends of the base 10 are horizontal rectangles, which can promote stability in the front-back and left-right directions when the base 10 is placed on the bed. In addition, a non-slip rubber pad can be provided on the bottom surface of the base 10 to cushion the movement of the base 10 caused by the patient's accidental lower limb movements.

[0032] In this embodiment, the positioning frame 20 is a columnar structure and is vertically fixed on the upper surface of the connecting part at both ends of the base 10. The positioning frame 20 has an axial movable cavity 21 inside, and the first drive unit 40 is disposed in the movable cavity 21 to achieve the purpose of hidden installation and avoid the first drive unit 40 being directly exposed to the external environment.

[0033] In this embodiment, the side wall of the positioning frame 20 is provided with an axially extending movable opening 22 that penetrates the movable cavity 21. The movable seat 30 is fixedly connected to the movable terminal 43 of the first drive unit 40 through a connector 80 that penetrates the movable opening 22. Specifically, the connector 80 is a bolt, and two bolts are provided and arranged vertically. The bolt passes through the movable seat 30 horizontally from the outside of the movable opening 22 toward the movable terminal of the first drive unit 40 and is threadedly connected to the movable terminal. This ensures a stable connection between the movable seat 30 and the movable terminal 43 of the first drive unit 40 while also facilitating subsequent maintenance and disassembly.

[0034] In this embodiment, the positioning frame 20 is a cylindrical structure, and the side wall of the movable seat 30 has an arc-shaped groove 31 that is adapted to the side wall of the positioning frame 20. The connecting piece 80 is located in the middle of the ground of the arc-shaped groove 31. Through the arrangement and cooperation of the arc-shaped groove 31 and the connecting piece 80, the movable seat 30 can be kept stable during the up and down sliding process, and the movable seat 30 can be prevented from tilting left and right.

[0035] In this embodiment, the spacing adjustment module 60 includes an adjustment shaft 61 arranged in the left-right direction, and an adjustment cavity 101 for axial movement of the adjustment shaft 61 is axially recessed on the longitudinal end 11 surface of the base 10. The spacing adjustment module 60 also includes a second drive unit 62 for driving the adjustment shaft 61 and the longitudinal end 11 to move axially relative to each other. The second drive unit 62 is disposed in the adjustment cavity 101. In actual use, the length of the adjustment shaft 61 inserted into the adjustment cavity 101 is driven by the first drive unit 40, thereby adjusting the spacing between the left and right positioning frames 20, thereby achieving the purpose of adjusting the spacing between the patient's left and right knees.

[0036] In this embodiment, both the adjusting shaft 61 and the adjusting cavity 101 are cuboid structures with rectangular longitudinal sections. The upper surface of the adjusting shaft 61 is provided with an adjusting scale line 90 along the axial direction. The cuboid structure of the adjusting shaft 61 and the adjusting cavity 101 can effectively ensure the stability of the axial extension and contraction of the adjusting shaft 61 and avoid longitudinal rotation. The adjusting scale line makes it convenient for doctors to understand the length of adjustment.

[0037] In this embodiment, the first drive unit 40 and the second drive unit 62 are any one of a lead screw motor module, a linear motor module, and an axial motor module. Preferably, this solution uses a lead screw motor module. Specifically, for the first drive unit 40, its first motor 41 is located at the bottom of the movable cavity 21, and its first lead screw shaft 42 is longitudinally disposed within the movable cavity 21 with its top end horizontally rotatably connected to the top of the positioning frame 20. The lead screw sleeve on the first lead screw shaft 42 of the first drive unit 40 serves as the movable terminal 43 of the first drive unit 40, and the movable terminal 43 is fixedly mounted to the movable seat 3 by bolts 100. 0. Leg support assembly 50; wherein, for the second drive unit 62, its second motor 621 is located at the end of the adjustment cavity 101 away from the patient, its second lead screw shaft 622 is horizontally arranged in the adjustment cavity 101, and the lead screw sleeve on the second lead screw shaft 622 of the second drive unit 62 is the movable terminal 623 of the second drive unit 62. The movable terminal 623 of the second drive unit 62 is fixedly connected to the adjustment shaft 61. When the second lead screw shaft 622 rotates, it can drive the adjustment shaft 61 to slide axially in the adjustment cavity 101 through its movable terminal 623, thereby adjusting the distance between the left and right positioning frames 20.

[0038] Furthermore, in order to balance adjusting a longer distance and miniaturizing the overall device, the end of the adjusting shaft 61 has an axial clearance groove 610 into which the second lead screw shaft 622 extends, and the movable terminal 623 of the second drive unit 62 is fixed at the opening of the clearance groove 610, while the end of the second lead screw shaft 622 is axially slidably connected to the inner wall of the clearance groove 610 through a slider 110.

[0039] Furthermore, for ease of operation, a lifting switch 120 and a spacing adjustment switch 130 are respectively installed on the top of the positioning frame 20 and on the side wall away from the patient to control the start and stop of the motors of the first drive unit 40 and the spacing adjustment module 60, facilitating operation by medical staff. Additionally, a microcontroller (not shown) for controlling the motors, lifting switches, and spacing adjustment switches is located inside the base 10. It should be noted that the control of the first drive unit 40 and the second drive unit 62 using the microcontroller is a conventional technique in the field; the microcontroller can be either an 89c51 or an STC series microcontroller, which will not be elaborated upon here.

[0040] In this embodiment, the positioning component 70 includes a slot 71 and a horizontal movable support arm 72. The slot 71 and the movable support arm 72 are located on the left and right sides of the base 10, respectively. Specifically, the slot 71 is located on the side of the horizontal end 12 of the base 10 closer to the patient, and the movable support arm 72 is located on the side of the horizontal end 12 of the base 10 away from the patient. Two movable support arms 72 are provided, both arranged along the front-back direction. The adjacent ends of the two movable support arms 72 are horizontally damped and rotatably connected to the base 10 via a vertical rotating shaft 140. Before the doctor performs the puncture procedure, the device is placed on the bed along the left-right direction and positioned at the patient's knee position. After adjusting the distance between the two bases 10, the two movable support arms 72 are unfolded. The ends of the two movable arms 72 are fixed to the folding armrests at the edge of the bed with straps or tape, so that the two movable arms 72 form a horizontal triangle, thereby stabilizing the base 10 on the bed. In addition, a rope can be used to loop around the slot 71 on the horizontal end 12 of the base 10 and tighten it to the armrests on the left and right sides of the bed. For patients with limited lower limb mobility or who are in a coma, this can effectively prevent the movement of their lower limbs from causing serious shaking of the entire device. In practice, it is necessary to ensure the connection strength between the movable terminal of the second drive unit and the adjustment shaft to avoid the base and adjustment shaft being pulled apart when the two bases are tightened to the folding armrests of the bed.

[0041] Furthermore, in order to further improve the overall compactness of the device, the movable support arm 72 is located on the side wall of the horizontal end 12 of the base 10 away from the patient, and there is a receiving groove 102 on the side wall to accommodate the movable support arm 72. When not in use, the movable support arm 72 can be stored in the receiving groove 102. When in use, the two ends of the two movable support arms 72 can be rotated out of the receiving groove 102 and bound together with the handrail on the hospital bed.

[0042] In this embodiment, the C-shaped base and the movable seat 30 are detachably connected by bolts 510 with the opening facing upward. The fastener 52 is preferably a strap with one end fixedly connected to one end of the C-shaped base and the other end detachably connected to the other end of the C-shaped base, so as to facilitate placing the patient's lower thigh and knee position in the inner cavity of the C-shaped base for fixation.

[0043] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A central venous catheter placement positioning aid, characterized in that, The device includes two bases facing each other, a positioning frame on the bases, a movable seat that slides longitudinally on the positioning frame, a first drive unit that drives the movable seat to move up and down, a leg support assembly on the movable seat for supporting the patient, a spacing adjustment module for adjusting the distance between the two bases, and a positioning assembly for positioning the bases on the hospital bed; the leg support assembly includes a C-shaped base for supporting the patient's lower limbs and fasteners for fixing the patient's lower limbs to the C-shaped base.

2. The central venous catheter placement positioning aid according to claim 1, characterized in that, The base is T-shaped, with the longitudinal ends of the two bases facing each other and coaxial from left to right.

3. The central venous catheter placement positioning aid according to claim 2, characterized in that, The positioning frame is a columnar structure and is vertically fixed to the connection parts at both ends of the base. The positioning frame has an axially movable cavity inside, and the first driving unit is located in the movable cavity.

4. The central venous catheter placement positioning aid according to claim 3, characterized in that, The positioning frame has an axially extending movable opening that penetrates the movable cavity on its side wall, and the movable seat is fixedly connected to the movable terminal of the first drive unit through a connector that penetrates the movable opening.

5. The central venous catheter placement positioning aid according to claim 4, characterized in that, The positioning frame is a cylindrical structure, and the side wall of the movable seat has an arc-shaped groove that fits the side wall of the positioning frame. The connecting piece is located in the middle of the ground of the arc-shaped groove.

6. The central venous catheter placement positioning aid according to claim 2, characterized in that, The spacing adjustment module includes an adjustment shaft arranged in the left-right direction, and an adjustment cavity for axial movement of the adjustment shaft is axially recessed on the longitudinal end face of the base; the spacing adjustment module also includes a second drive unit for driving the adjustment shaft and the longitudinal end to move axially relative to each other, and the second drive unit is disposed in the adjustment cavity.

7. The central venous catheter placement positioning aid according to claim 6, characterized in that, The longitudinal section of the adjusting shaft is square, and the upper surface of the adjusting shaft is provided with adjusting scale lines along the axial direction.

8. The central venous catheter placement positioning aid according to claim 6, characterized in that, Both the first drive unit and the second drive unit are any one of a lead screw motor module, a linear motor module, or an axial motor module.

9. The central venous catheter placement positioning aid according to claim 1 or 2, characterized in that, The positioning component includes a slot and a horizontal movable support arm. The slot and the movable support arm are located on the left and right sides of the base, respectively. There are two movable support arms, both of which are arranged in the front-back direction. The adjacent ends of the two movable support arms are horizontally damped and rotatably connected to the base.

10. The central venous catheter placement positioning aid according to claim 1, characterized in that, The C-shaped base is detachably connected to the movable seat and has its opening facing upwards. The fastener is a strap with one end fixedly connected to one end of the C-shaped base and the other end detachably connected to the other end of the C-shaped base.

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