Catheter fixer

Abstract

The invention provides a catheter fixator, and relates to the technical field of fixators. A fixing shell is arranged on the sticking piece, a tube shell is clamped in the fixing shell, a catheter is arranged in the tube shell, the tube shell comprises a fixed part and a movable part which are in sliding connection, one side of the fixed part is a piercing side, the fixing shell comprises a base and a top cover, the base is hinged to one end of the top cover, the other end of the top cover is clamped, and the base is arranged on the sticking piece. The base and the top cover are respectively provided with a bottom groove and a top groove which are matched with the fixed part of the tube shell in shape, a lower sliding block and an upper sliding block which are matched with the movable part of the tube shell are respectively arranged in the base and the top cover at the side parts of the bottom groove and the top groove in a sliding manner, and the upper sliding block and the lower sliding block are respectively provided with a groove matched with the movable part in shape; the sides, away from the top groove and the bottom groove, of the upper sliding block and the lower sliding block are connected with elastomers. Tension borne by the catheter is buffered, the fixator and the catheter are protected, and it is avoided that the sticking piece fixed to the human body is directly subjected to rigid tension, and consequently sticking is not firm.

Description

Technical Field

[0001] This invention relates to the field of fixation technology, and more specifically to a catheter fixation device. Background Technology

[0002] In clinical practice, patients frequently have various catheters inserted, such as central venous catheters for intravenous infusion, chest, abdominal, and pericardial drainage tubes for drainage, postoperative plasma drainage tubes, and feeding tubes such as gastric and jejunal tubes. During the insertion process, these catheters are prone to dislodgement due to external forces such as traction, which may require reinsertion or lead to other risks and adverse consequences for the patient.

[0003] In existing technologies, the common method for securing catheters is the Strappy clip. Although it can secure the catheter under normal circumstances, patients inevitably pull on the catheter during use, such as during routine actions like squatting or turning over. The catheter may also be caught on external objects or bumped by others, causing it to be pulled loose. The tension on the catheter is directly transmitted to the fixator, and the tension on the fixator and adhesive strip can lead to insecure adhesion, creating a risk of catheter dislodgement later. Furthermore, patients or caregivers may not be aware of the catheter being pulled immediately, and without warning measures, the catheter may be pulled out. Summary of the Invention

[0004] The purpose of this invention is to develop a catheter fixator that buffers the tension on the catheter, protects the fixator and the catheter, and prevents the adhesive patch that is fixed to the human body from being directly subjected to rigid tension, which would cause it to not adhere properly.

[0005] This invention is achieved through the following technical solution:

[0006] A catheter fixator, comprising:

[0007] Adhesive sheet;

[0008] The mounting shell is attached to the adhesive sheet;

[0009] The tube shell is snapped into the fixed shell, and the conduit is located inside the tube shell;

[0010] The tube shell includes a fixed part and a movable part that are slidably connected. One side of the fixed part is the insertion side. The fixed shell includes a base and a top cover. The base and the top cover are hinged at one end and snapped together at the other end. The base is disposed on an adhesive piece. The base and the top cover are respectively provided with a bottom groove and a top groove whose shapes are adapted to the fixed part of the tube shell. The bottom slide and the top cover on the side of the bottom groove and the top groove are respectively provided with a lower slide block and an upper slide block that cooperate with the movable part of the tube shell. The upper slide block and the lower slide block are both provided with a groove that is adapted to the shape of the movable part. An elastic body is connected to the side of the upper slide block and the lower slide block away from the top groove and the bottom groove.

[0011] Optionally, the fixed part is frustum-shaped at the end away from the movable part with the smaller diameter end facing the movable part. The fixed part is provided with two through holes, and a fixing post that mates with the two through holes is provided at the corresponding position in the bottom groove.

[0012] Optionally, the bottom groove and top groove, as well as the upper slider and lower slider, are symmetrical structures. The bottom groove and top groove are each half of the shape of the fixed part, and the grooves on the upper slider and the lower slider are each half of the shape of the movable part.

[0013] Optionally, the fixed part has a cylindrical tube near the movable part, the movable part slides on the tube, and the end of the tube away from the fixed part has a retaining ring extending outward in a circular shape. The movable part is frustum-shaped and hollow, the small diameter end of the movable part faces away from the fixed part, and the large diameter end of the movable part has a tube hole that slides with the tube.

[0014] Optionally, the conduit enters the fixed housing through the small-diameter end of the movable part, and then extends through the tube and the fixed part. The conduit is fixedly connected to both the movable part and the fixed part. The conduit inside the movable part and the tube is a flexible hose segment. When the movable part is in contact with the fixed part, the flexible hose segment is not in a straight state.

[0015] Optionally, it also includes an electrically connected displacement monitoring component, an early warning component, and a signal component. The displacement monitoring component monitors the displacement distance of the upper or lower slider. When the displacement distance exceeds the early warning value, the early warning component controls the signal component to issue an early warning signal that can be perceived by the patient or caregiver.

[0016] Optionally, the top of the upper slider or the bottom of the lower slider is provided with a support that is slidably connected to the top cover or the base. There is a gap between the top of the upper slider and the top cover or between the bottom of the lower slider and the base. The displacement monitoring component is located in the gap to monitor the distance between the support and the side wall of the gap.

[0017] Optionally, the displacement monitoring component includes a protective sleeve, which is elastic. Both ends of the protective sleeve are connected to a support and the inner wall of a gap opposite to the support, respectively. An elastic conductive rod is provided inside the protective sleeve. The elastic conductive rod is made of conductive silicone. Both ends of the elastic conductive rod are fixed to the support and the side wall of the gap, respectively. A spring pin is provided between the support and the fixed shell. One end of the elastic conductive rod is electrically connected to the spring pin, and the other end is electrically connected to a conductive electrode on the inner wall of the gap. The spring pin and the conductive electrode are electrically connected to the early warning component.

[0018] Optionally, the warning component is disposed on the adhesive patch and has a built-in power supply and control circuit. The signal emitted by the signal component can be any one or more of vibration, sound and light, or a slight stimulating sensation that can be perceived by the patient's skin.

[0019] Optionally, when the signal component emits a vibration signal, the signal component includes a sheet-shaped piezoelectric ceramic vibrating plate disposed on the adhesive sheet;

[0020] When the signal component emits an audible and visual signal, the signal component includes an LED light and a buzzer disposed on the adhesive sheet or on the warning component;

[0021] When the signal component emits a slight stimulating sensation, the signal component includes a medical silver electrode disposed on the adhesive patch.

[0022] The beneficial effects of this invention are:

[0023] When the catheter is subjected to slight pulling, it can achieve elastic buffering, avoiding direct rigid force on the entire tube shell, fixing shell, and adhesive pad, preventing the adhesive pad from being pulled loose, and also protecting the catheter from being pulled apart or damaged. When the catheter is subjected to elastic buffering, the displacement monitoring component, early warning signal, and signal component work together to remind the patient and nursing staff of the catheter pulling situation, especially the vibration or slight stimulation directly applied to the patient to remind the patient to pay attention immediately, preventing the catheter from being pulled further or from being dislodged by further actions of the patient, thus protecting the patient. The displacement monitoring component has a simple structure, low cost, light weight, high sensitivity, and is easy to promote and use. Moreover, compared with traditional fixation devices, this solution requires no additional operation; it is still just a matter of installing and putting on the top cover. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural diagram of the present invention;

[0026] Figure 2 This is a diagram of the internal structure of the fixed shell;

[0027] Figure 3 This is a structural diagram showing the connection between the fixed shell and the tubular shell.

[0028] Figure 4 This is a diagram of the internal structure of the tube shell.

[0029] Reference numerals: 1. Adhesive sheet; 2. Warning component; 3. Fixing shell; 31. Base; 32. Top cover; 33. Bottom groove; 34. Fixing post; 35. Top groove; 36. Upper slider; 37. Lower slider; 38. Groove; 39. Elastomer; 310. Support; 311. Spring pin; 312. Protective sleeve; 313. Elastic conductive rod; 4. Piezoelectric ceramic vibrating plate; 5. Tube shell; 51. Fixing part; 52. Moving part; 53. Through hole; 54. Tube; 55. Retaining ring; 56. Tube hole; 57. Flexible hose section. Detailed Implementation

[0030] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0032] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] like Figures 1-4 As shown, the present invention discloses a catheter fixator, including an adhesive patch 1, which is butterfly-shaped. The adhesive patch 1 is adhered to the patient's skin. A fixing shell 3 is fixedly connected to the adhesive patch 1. A tube shell 5 is snapped into the fixing shell 3, and the catheter is placed inside the tube shell 5.

[0034] The casing 5 includes a fixed part 51 and a movable part 52. The fixed part 51 is provided with two through holes 53. The end of the fixed part 51 away from the movable part 52 is truncated cone-shaped with the smaller diameter end facing the movable part 52. A cylindrical tube 54 is provided at the end of the fixed part 51 near the movable part 52. A retaining ring 55 extending outward circumferentially is provided at the end of the tube 54 away from the fixed part 51.

[0035] The movable part 52 is truncated cone-shaped and hollow. The movable part 52 slides on the tube 54. The small diameter end of the movable part 52 faces away from the fixed part 51. The large diameter end of the movable part 52 is coaxially provided with a tube hole 56 that slides with the tube 54.

[0036] The catheter enters the fixed shell 3 through the small-diameter end of the movable part 52, and then extends through the tube 54 and the fixed part 51. One side of the fixed part 51 is the insertion side, that is, the fixed part 51 is located on the side where the catheter is inserted into the patient's body. The catheter is fixedly connected to both the movable part 52 and the fixed part 51. The catheter in the movable part 52 and the tube 54 is a flexible tube segment 57. When the movable part 52 is in contact with the fixed part 51, the flexible tube segment 57 is not in a straight state. The movable part 52 slides on the tube 54 until it slides to the retaining ring 55. At this time, the flexible tube segment 57 is in a straight state.

[0037] The fixed shell 3 includes a base 31 and a top cover 32. The base 31 and the top cover 32 are hinged and snap-fitted together. The base 31 is provided with a bottom groove 33 that matches the shape of the fixing part 51 of the tube shell 5. The bottom groove 33 is also provided with a fixing post 34 that is inserted into the two through holes 53. The top cover 32 is provided with a top groove 35 that matches the shape of the fixing part 51 of the tube shell 5.

[0038] An upper slider 36 is slidably provided on the top cover 32 on the side of the top groove 35, and a lower slider 37 is slidably provided on the base 31 on the side of the bottom groove 33. Both the upper slider 36 and the lower slider 37 are provided with grooves 38 that are adapted to the shape of the movable part 52.

[0039] The top cover 32 and the base 31 each have corresponding slots at their ends that mate with the guide tube. The bottom slot 33, top slot 35, upper slider 36, and lower slider 37 are all symmetrical structures. The bottom slot 33 and top slot 35 are each half of the shape of the fixed part 51. Correspondingly, the groove 38 on the upper slider 36 and the groove 38 on the lower slider 37 are each half of the shape of the movable part 52. After the top cover 32 is attached to the base 31, the shapes of the top slot 35 and bottom slot 33 are adapted to the fixed part 51. The upper slider 36 and the lower slider 37 cover the groove 38 inside them, and the shape of the groove 38 is adapted to the movable part 52. The slots at both ends of the top cover 32 and the slots at both ends of the base 31 form a circular hole that mates with the guide tube.

[0040] An elastic body 39 is connected to the side of the upper slider 36 and the lower slider 37 away from the top groove 35 and the bottom groove 33. The elastic body 39 is connected to the top cover 32 or the base 31. The elastic force of the elastic body 39 pushes the upper slider 36 and the lower slider 37 to press against the edge of the top groove 35 and the edge of the bottom groove 33. The elastic body 39 can be an elastic material, such as rubber or silicone, or it can be a spring.

[0041] After the catheter is inserted into the patient's body, the adhesive patch 1 is attached next to the insertion site. The top cover 32 is opened, and the tube shell 5 is placed into the base 31, aligning the tube shell 5 with the bottom groove 33 and the groove 38 of the lower slider 37 within the base 31. Then, the top cover 32 is closed to secure the catheter. When catheter pulling occurs, the movable part 52 of the tube shell 5 slides on the tube 54, compressing the two elastic bodies 39. The elastic force of the elastic bodies 39 buffers the traction force on the catheter. During the sliding of the movable part 52, the outer end of the fixing part 51 is shaped like a frustum for fixation. During the sliding of the movable part 52, the flexible tube section 57 of the internal catheter straightens accordingly without affecting the catheter delivery. After the external force is removed, the elastic force of the elastic bodies 39 pushes the upper slider 36 and the lower slider 37 back to their original positions, causing the movable part 52 to return to its original position. This achieves force buffering, protecting the catheter from tension that would cause it to break or the adhesive patch 1 to detach.

[0042] The catheter fixation device also includes an electrically connected displacement monitoring component, an early warning component 2, and a signal component. The displacement monitoring component monitors the displacement distance of the upper slider 36 or the lower slider 37, that is, the degree to which the movable part 52 slides away from the fixed part 51. When the early warning value is exceeded, the early warning component 2 controls the signal component to issue an early warning signal that can be perceived by the patient or caregiver.

[0043] The bottom of the sliding block 37 is provided with a support 310 that is slidably connected to the base 31. The support 310 creates a gap between the bottom of the sliding block 37 and the base 31, and the displacement monitoring component is disposed within this gap. The displacement monitoring component includes a protective sleeve 312, which is elastic. Both ends of the protective sleeve 312 are connected to the support 310 and the inner wall of the gap opposite to the support 310, respectively. That is, the protective sleeve 312 is located on the side of the support 310 away from the elastomer 39. An elastic conductive rod 313 is provided inside the protective sleeve 312. The elastic conductive rod 313 is made of conductive silicone. The conductive silicone is made by uniformly dispersing conductive fillers such as carbon nanotubes, graphene, and silver nanowires in the silicone elastomer 39. There is a gap between the protective sleeve 312 and the elastic conductive rod 313 so that the two do not contact each other during the extension and retraction of the protective sleeve 312 and the elastic conductive rod 313. Both ends of the elastic conductive rod 313 are also fixed to the support 310 and the side wall of the gap, respectively. A spring pin 311 is provided between the support 310 and the fixed shell 3. That is, the spring pin 311 is located at the lower part of the elastic body 39. One end of the elastic conductive rod 313 is electrically connected to the spring pin 311, and the other end is electrically connected to the conductive electrode on the inner wall of the gap. The spring pin 311 and the conductive electrode are electrically connected to the warning component 2. The warning component 2 monitors the resistance value of the elastic conductive rod 313 to monitor the length of the elastic conductive rod 313, thereby monitoring whether the movable part 52 has shifted.

[0044] When the catheter is not being pulled, the movable part 52 is in the reset state and is in contact with the fixed part 51. At this time, the elastic conductive rod 313 is also in the reset state, and its resistance value is at the standard state. When the catheter is being pulled, the movable part 52 slides away from the fixed part 51, and the support 310 slides and pulls the protective sleeve 312 and the internal elastic conductive rod 313. The elastic conductive rod 313 elongates and its cross-sectional area decreases. According to the law of resistance, the resistance of the elastic conductive rod 313 increases significantly. By monitoring the resistance value of the elastic conductive rod 313, the pulling of the catheter can be monitored. A warning value is set. When the resistance of the elastic conductive rod 313 exceeds the warning value, the signal component activates to remind the patient or nursing staff to avoid further aggravation of the catheter pulling action. In particular, the vibration or slight irritation generated by the signal component quickly reminds the patient to immediately observe the catheter or stop the current action that is causing the catheter pulling to avoid catheter dislodgement. The displacement monitoring component can also be a miniature capacitive displacement sensor or other displacement or distance sensors, but these sensors are expensive, complex to install, have low biocompatibility, and limited applicability.

[0045] The warning component 2 is mounted on the adhesive patch 1 and has a built-in power supply and control circuit. The power supply can be a button battery. The signal emitted by the signal component can be vibration, sound, or light. Vibration can also be replaced by a slight irritation that the patient's skin can perceive. In this embodiment, the signal component includes vibration, and the signal component includes a sheet-like piezoelectric ceramic vibrating pad 4 mounted on the adhesive patch 1. When the signal is sound or light, the signal component includes an LED light and a buzzer mounted on the adhesive patch 1 or the warning component 2. When the signal is a slight irritation, the signal component includes a medical silver electrode mounted on the adhesive patch 1. The piezoelectric ceramic vibrating pad 4, the medical silver electrode, and the wires are completely encased in a medical silicone film.

[0046] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the technical solutions of the present invention. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of the patent of the present invention.

Claims

1. A catheter fixator, characterized in that, include: Adhesive sheet; The mounting shell is attached to the adhesive sheet; The tube shell is snapped into the fixed shell, and the conduit is located inside the tube shell; The tube shell includes a fixed part and a movable part that are slidably connected. One side of the fixed part is the insertion side. The fixed shell includes a base and a top cover. The base and the top cover are hinged at one end and snapped together at the other end. The base is disposed on an adhesive piece. The base and the top cover are respectively provided with a bottom groove and a top groove whose shapes are adapted to the fixed part of the tube shell. The bottom slide and the top cover on the side of the bottom groove and the top groove are respectively provided with a lower slide block and an upper slide block that cooperate with the movable part of the tube shell. The upper slide block and the lower slide block are both provided with a groove that is adapted to the shape of the movable part. An elastic body is connected to the side of the upper slide block and the lower slide block away from the top groove and the bottom groove.

2. The catheter fixator according to claim 1, characterized in that, The fixed part is frustum-shaped at the end away from the movable part, with the smaller diameter end facing the movable part. The fixed part is provided with two through holes, and a fixing post is provided in the corresponding position in the bottom groove to cooperate with and be inserted into the two through holes.

3. The catheter fixator according to claim 1, characterized in that, The bottom groove and top groove, as well as the upper slider and lower slider, are all symmetrical structures. The bottom groove and top groove are each half of the shape of the fixed part, and the grooves on the upper slider and the lower slider are each half of the shape of the movable part.

4. The catheter fixator according to claim 1, characterized in that, The fixed part has a cylindrical tube near the movable part. The movable part slides on the tube. The end of the tube away from the fixed part has a retaining ring extending outward in a circular shape. The movable part is frustum-shaped and hollow. The small diameter end of the movable part faces away from the fixed part. The large diameter end of the movable part has a tube hole that slides with the tube.

5. The catheter fixator according to claim 4, characterized in that, The conduit enters the fixed shell through the small-diameter end of the movable part, and then extends through the tube and the fixed part. The conduit is fixedly connected to both the movable part and the fixed part. The conduit inside the movable part and the tube is a flexible hose segment. When the movable part is in contact with the fixed part, the flexible hose segment is not in a straight state.

6. The catheter fixator according to any one of claims 1 to 5, characterized in that, It also includes an electrically connected displacement monitoring component, an early warning component, and a signal component. The displacement monitoring component monitors the displacement distance of the upper or lower slider. When the displacement distance exceeds the early warning value, the early warning component controls the signal component to issue an early warning signal that can be perceived by the patient or caregiver.

7. The catheter fixator according to claim 6, characterized in that, The upper slider has a support at the top or the lower slider has a support that is slidably connected to the top cover or the base. There is a gap between the top of the upper slider and the top cover or between the bottom of the lower slider and the base. The displacement monitoring component is located in the gap to monitor the distance between the support and the side wall of the gap.

8. The catheter fixator according to claim 7, characterized in that, The displacement monitoring component includes a protective sleeve, which is elastic. Both ends of the protective sleeve are connected to a support and the inner wall of the gap opposite to the support, respectively. An elastic conductive rod is provided inside the protective sleeve. The elastic conductive rod is made of conductive silicone. Both ends of the elastic conductive rod are fixed to the support and the side wall of the gap, respectively. A spring pin is provided between the support and the fixed shell. One end of the elastic conductive rod is electrically connected to the spring pin, and the other end is electrically connected to a conductive electrode on the inner wall of the gap. The spring pin and the conductive electrode are electrically connected to the early warning component.

9. The catheter fixator according to claim 6, characterized in that, The warning component is mounted on the adhesive patch and has a built-in power supply and control circuit. The signal emitted by the signal component can be any one or more of vibration, sound and light, or a slight stimulating sensation that can be perceived by the patient's skin.

10. The catheter fixator according to claim 9, characterized in that, When the signal component emits a vibration signal, the signal component includes a sheet-shaped piezoelectric ceramic vibrating sheet disposed on the adhesive sheet; When the signal component emits an audible and visual signal, the signal component includes an LED light and a buzzer disposed on the adhesive sheet or on the warning component; When the signal component emits a slight stimulating sensation, the signal component includes a medical silver electrode disposed on the adhesive patch.

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