Catheter securement device and integrated puncture catheter securement device

Abstract

A catheter fixation device and an integrated device for fixing puncture catheters are disclosed. The catheter fixation device includes: a fixing base having a central channel through which the catheter passes; a rotating member rotatably disposed on the fixing base; a retractable member disposed on the rotating member, adapted to retract towards the center of the fixing base when the rotating member rotates in a first direction to fix the catheter located within the central channel; and a locking mechanism having a locked state and an unlocked state. In the locked state, the locking mechanism locks the rotating member in a predetermined position; in the unlocked state, the rotating member is adapted to rotate in a second direction opposite to the first direction, and the retractable member retracts to the periphery. The catheter fixation device provided by this invention can firmly fix the catheter, and the operation of fixing and unfixing the catheter is simple and convenient, and it is applicable to catheters of different types and sizes.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a catheter fixation device and an integrated device for fixing puncture catheters. Background Technology

[0002] A catheter fixator is a medical device product primarily used to secure various catheters and prevent errors or displacement during use. It is widely used for securing and protecting puncture needles, fixing indwelling needles, intravenous catheters, and medical drainage catheters.

[0003] Currently, common catheter fixation devices include components such as fixation straps, adhesives, or fixation plates, which can secure the catheter to the patient's skin. However, these fixation methods often suffer from problems such as unreliable fixation, complex fixation methods, or incompatibility with different types and sizes of catheters.

[0004] Therefore, there is an urgent need to provide a catheter fixation device that is simple to operate and applicable to various types and sizes of catheters. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a catheter fixation device and an integrated device for fixing puncture catheters, which can easily fix and release the catheter, and is applicable to catheters of different types and sizes.

[0006] To address the aforementioned technical problems, embodiments of the present invention provide a catheter fixation device, comprising: a fixing base having a central channel through which the catheter passes; a rotating member rotatably disposed on the fixing base; a retractable member having one end disposed on the rotating member and the other end disposed on the fixing base, the retractable member being adapted to retract toward the center of the fixing base when the rotating member rotates in a first direction, thereby fixing the catheter located within the central channel; and a locking mechanism having a locked state and an unlocked state, wherein in the locked state, the locking mechanism locks the rotating member in a predetermined position; and in the unlocked state, the rotating member is adapted to rotate in a second direction opposite to the first direction, and the retractable member retracts to the periphery.

[0007] Optionally, the shrinking member is a flexible shrinking member, which is adapted to stretch and deform to generate an elastic restoring force when the rotating member rotates in the first direction.

[0008] Optionally, the shrinkage element is made of a flexible film.

[0009] Optionally, the locking mechanism includes a locking member and a mating member. The locking member is disposed on the rotating member, and the mating member is disposed on the fixed base. In the locked state, the locking member and the mating member abut against each other. The elastic restoring force acts on the locking member, and the mating member provides a supporting force to the locking member in the opposite direction to the elastic restoring force, so that the locking member abuts against the mating member.

[0010] Optionally, the mating member includes a starting end and an ending end disposed along the first direction, the width of the mating member gradually increasing from the starting end to the ending end, and the end face of the ending end being adapted to abut against the locking member.

[0011] Optionally, the locking member includes an abutment portion, the abutment portion including a transition surface and an abutment surface. During the process of the rotating member rotating along the first direction to the predetermined position, the transition surface moves along the starting end of the mating member to the end end, and the abutment surface is adapted to abut against the end face of the end at the predetermined position.

[0012] Optionally, during the process of the rotating component rotating along the first direction to the predetermined position, the end of the transition surface that initially contacts the mating component is set as an arc-shaped surface.

[0013] Optionally, the locking component further includes: an unlocking part, which is connected to the abutting part via a connector; a first elastic element, which is sleeved on the connector, with one end of the first elastic element connected to the unlocking part and the other end of the first elastic element connected to the outer peripheral surface of the rotating component; during the process of the rotating component moving from the starting end to the ending end, the first elastic element is compressed until the rotating component rotates to the predetermined position, at which point the first elastic element naturally stretches so that the abutting surface abuts against the end face of the ending end.

[0014] Optionally, the unlocking part is adapted to move in the radial direction of the rotating member when pressed, thereby causing the abutting part to move in the radial direction of the rotating member, so as to separate the abutting part from the mating part.

[0015] Accordingly, embodiments of the present invention also provide an integrated device for fixing a puncture catheter, including a puncture device and the aforementioned catheter fixing device, wherein the puncture device is removably disposed on the catheter fixing device.

[0016] Compared with the prior art, the technical solution of the embodiments of the present invention has the following beneficial effects: The catheter fixation device provided in this technical solution allows the catheter to pass through the central channel of the fixation base. Then, by rotating the rotating component in a first direction, a retractable component mounted on the rotating component retracts towards the center of the fixation base, enclosing the catheter within the central channel. Simultaneously, when the locking mechanism is in the locked state, it locks the position of the rotating component, thus maintaining the catheter's fixation by the retractable component. When the locking mechanism is released, the rotating component rotates in the opposite direction of the first direction, and the retractable component retracts towards the periphery of the fixation base, releasing the restriction on the catheter and allowing it to be removed from the central channel. This catheter fixation device provides secure fixation of the catheter, and both the locking and unlocking methods are simple and convenient, facilitating operation by medical personnel.

[0017] Furthermore, the shrink-fit element is a flexible shrink-fit element, adapted to stretch and deform to generate an elastic restoring force when the rotating element rotates along the first direction. The flexible shrink-fit element can adapt to catheters of different sizes or types, and achieves flexible wrapping and fixation of the catheter without causing indentations or damage. Additionally, the flexible shrink-fit element generates an elastic restoring force when the rotating element rotates along the first direction. When the locking mechanism is unlocked, this restoring force can drive the rotating element to rotate in the second direction, thereby releasing the catheter. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the catheter fixation device in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the catheter fixing device after removing the rotating component in one embodiment of the present invention; Figure 3 yes Figure 2 The diagram shows the structure of the locking mechanism. Figure 4 yes Figure 1 A top-view structural schematic diagram of the catheter fixation device shown; Figure 5 yes Figure 1 A schematic diagram of the cross-sectional structure of the catheter fixation device along the AA direction. Figure 6 This is a side view of the cross-sectional structure of the puncture catheter fixation integrated device in one embodiment of the present invention; Figure 7 yes Figure 6 An enlarged structural diagram of the content indicated by the circle. Detailed Implementation

[0019] As described in the background section, common catheter fixation devices currently include fixation straps, adhesives, or other fixation structures. However, using fixation straps or adhesives to fix catheters may result in catheter dislodgement due to insecure fixation, and may also cause pressure marks on the skin. Other types of fixators may have complex structures or be difficult to operate, increasing the difficulty and time required for the procedure.

[0020] To address the aforementioned problems, this invention provides a catheter fixation device, comprising a fixing base, a rotating component, a retractable component, and a locking mechanism. The fixing base acts on human tissue, and the catheter passes through the central channel of the fixing base. The rotating component is rotatably mounted on the fixing base, and the retractable component is mounted on the rotating component. During rotation of the rotating component in a first direction, the retractable component retracts towards the center of the fixing base, enclosing the catheter located within the central channel. Simultaneously, when the rotating component rotates to a predetermined position, the locking mechanism is locked, holding the retractable component in its retracted state, thereby achieving secure fixation of the catheter. When the locking mechanism is unlocked, the rotating component can rotate in the opposite direction of the first direction, and the retractable component retracts towards the periphery of the fixing base, releasing the catheter and releasing it. The catheter fixation device is simple and convenient to operate, achieving secure locking of the catheter, and the retractable component can accommodate catheters of different sizes or types.

[0021] To make the above-mentioned objectives, features and beneficial effects of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the catheter fixation device in one embodiment of the present invention; Figure 2 This is a schematic diagram of the catheter fixing device after removing the rotating component in one embodiment of the present invention; Figure 3 yes Figure 2 A partially enlarged schematic diagram of the locking mechanism shown. Figure 4 yes Figure 1 A top-view structural schematic diagram of the catheter fixation device shown; Figure 5 yes Figure 1 The diagram shows a cross-sectional view of the catheter fixation device along the AA direction.

[0023] Reference Figure 1 , Figure 2 and Figure 5 The catheter fixing device 1 includes: a fixing base 100, the fixing base 100 having a spacer for the catheter 10 (reference) Figure 5The conduit 10 is located within the central channel 11; a rotating member 500 rotatably mounted on the fixed base 100; a retractable member 600, one end of which is mounted on the rotating member 500 and the other end on the fixed base 100, the retractable member 600 being adapted to retract toward the center of the fixed base 100 when the rotating member 500 rotates along the first direction X, thereby fixing the conduit 10 located within the central channel 11; and a locking mechanism 700 having a locked state and an unlocked state. In the locked state, the locking mechanism 700 locks the rotating member 500 in a predetermined position; in the unlocked state, the rotating member 500 is adapted to rotate along a second direction opposite to the first direction X, and the retractable member 600 retracts to the periphery.

[0024] The aforementioned catheter fixation device 1 is used to fix the catheter 10 to human tissue. The catheter 10 passes through the central channel 11 of the fixation base 100 and extends into the human tissue. Then, the catheter 10 is fixed by the catheter fixation device 1 to prevent the catheter from falling off or shaking.

[0025] In this embodiment, the rotating member 500 of the catheter fixing device 1 is coaxially arranged with the fixing base 100 and can rotate around the center of the fixing base 100. One end of the contracting member 600 is disposed on the rotating member 500 and the other end is disposed on the fixing base 100. When the rotating member 500 rotates along the first direction X, the contracting member 600 contracts and converges towards the center of the fixing base 100, wrapping around the catheter 10 located in the central channel 11. The locking mechanism 700 locks the rotating member 500 in a predetermined position, thereby keeping the contracting member 600 in a contracted and converged state, achieving the purpose of firmly fixing the catheter. When the catheter needs to be released, the locking mechanism 700 is released, and the locking mechanism 700 is in the unlocked state. The rotating member 500 rotates in the second direction, which is the opposite direction of the first direction X, and the contracting member 600 retracts towards the periphery of the fixing base 100, releasing the fixation of the catheter 10, and the catheter 10 can be taken out from the central channel 11.

[0026] In a specific implementation, the fixed base 100 includes a base 102 and a hollow cavity 101 protruding from the base 102 and extending through the fixed base 100 along the Z-axis. The center of the hollow cavity 101 is the center of the fixed base 100. The central channel 11 is located inside the hollow cavity 101 and is coaxially arranged with the hollow cavity 101. The rotating member 500 is disposed outside the hollow cavity 101 and can rotate around the center of the hollow cavity 101.

[0027] In this embodiment, the rotating component 500 is a hollow annular structure.

[0028] In this embodiment, a first annular groove is provided on the outside of the hollow cavity 101, a second annular groove is provided on the outside of the rotating member 500, one end of the shrinking member 600 is fixed in the first annular groove by a first annular retaining ring 601, and the other end of the shrinking member 600 is fixed in the second annular groove by a second annular retaining ring 602.

[0029] In this embodiment, the catheter fixation device 1 further includes a cross-shaped sealing cap 103 (see reference). Figure 6 The cross-shaped sealing cap 103 is disposed inside the hollow chamber 101. When the conduit 10 passes through the hollow chamber 101, the cross-shaped sealing cap 103 can seal against the outside of the conduit 10.

[0030] In this embodiment, the catheter fixing device 1 further includes a base 104, and the fixing base 100 is located on the base 104.

[0031] In this embodiment, the first direction X is clockwise, and the second direction is counterclockwise. In other embodiments, the first direction X may be counterclockwise, and the second direction may be clockwise.

[0032] In some embodiments, the shrinking member 600 is a flexible shrinking member, which is adapted to stretch and deform to generate an elastic restoring force when the rotating member 500 rotates along the first direction X.

[0033] The retractable component 600 is a flexible retractable component. During the process of retracting and converging towards the center of the fixed base 100, it can adapt to different sizes or types of conduits 10, achieving flexible wrapping and fixation of the conduit 10 without causing indentations or damage. As the flexible retractable component rotates with the rotating component 500, it generates an elastic restoring force due to stretching deformation. When the locking mechanism 700 unlocks, this elastic restoring force can drive the rotating component 500 to rotate in a second direction and cause the flexible retractable component to retract, achieving automatic release of the conduit 10. The operation is simple and convenient.

[0034] Specifically, the shrinkage member 600 is made of elastic films such as silicone or TPE (thermoplastic elastomer).

[0035] Reference Figures 2 to 4The locking mechanism 700 includes a locking member 710 and a mating member 720. The locking member 710 is disposed on the rotating member 500, and the mating member 720 is disposed on the fixed base 100. In the locked state, the locking member 710 and the mating member 720 abut against each other. The elastic restoring force acts on the locking member 710, and the mating member 720 provides a supporting force to the locking member 710 in the opposite direction to the elastic restoring force, so that the locking member 710 abuts against the mating member 720.

[0036] In this embodiment, the locking member 710 is disposed on the rotating member 500, and the locking member 710 rotates with the rotating member 500; the mating member 720 is fixedly disposed on the base 102 of the fixed base 100, and when the locking member 710 rotates to a predetermined position with the rotating member 500, the locking member 710 and the mating member 720 are locked.

[0037] In this embodiment, the locking member 710 and the mating member 720 are locked by abutting each other. When in the predetermined position, the elastic restoring force generated by the stretching deformation of the contraction member 600 during rotation has a force in the second direction, while the mating member 720 provides the locking member 710 with a force in the first direction X. The two interact with each other, so that the locking member 710 is stably abutted against the mating member 720, thereby achieving a firm fixation of the conduit 10.

[0038] In other embodiments, the locking member 710 and the mating member 720 may also be locked by other means such as interlocking or snapping.

[0039] In one embodiment, the mating member 720 includes a starting end 721 and an ending end 722 disposed along the first direction X. From the starting end 721 to the ending end 722, the width of the mating member 720 gradually increases, and the end face of the ending end 722 is adapted to abut against the locking member 710.

[0040] In this embodiment, the width of the mating member 720 refers to the width of the mating member 720 in the radial direction of the fixed base 100.

[0041] In one embodiment, the locking member 710 includes an abutment portion 701, the abutment portion 701 including a transition surface 702 and an abutment surface 703. During the process of the rotating member 500 rotating along the first direction X to the predetermined position, the transition surface 702 moves along the starting end 721 of the mating member 720 to the end end 722, and the abutment surface 703 is adapted to abut against the end face of the end end 722 at the predetermined position.

[0042] Furthermore, the mating component 720 includes a first curved surface 723 and a second curved surface 724 connecting the starting end 721 and the ending end 722. The first curved surface 723 is closer to the center of the fixed base 100 than the second curved surface 724. The transition surface 702 is opposite to the first curved surface 723 in the radial direction of the fixed base 100. The abutting surface 703 is opposite to the end face of the ending end 722 in the circumferential direction of the fixed base 100.

[0043] In a specific implementation, the locking member 710 rotates along the first direction X with the rotating member 500 until it reaches the position of the mating member 720. It then initially contacts the starting end 721 of the mating member 720. The transition surface 702 moves along the first curved surface 723 until it reaches the predetermined position. The end face of the mating member 720, where the end 722 is located, abuts against the abutting surface 703 of the locking member 710, thereby locking the locking mechanism 700.

[0044] Furthermore, during the process of the rotating member 500 rotating along the first direction X to the predetermined position, the end of the transition surface 702 that initially contacts the mating member 720 is set as an arc-shaped surface.

[0045] In this embodiment, the arc-shaped surface provided on the transition surface 702 can play a guiding role when it initially contacts the mating part 720, so that the transition surface 702 can better cooperate with the first curved surface 723 and guide the locking part 710 to rotate along the starting end 721 to the ending end 722.

[0046] Reference Figure 4 and Figure 5 The locking member 710 further includes: an unlocking part 704, which is connected to the abutting part 701 via a connector 705; a first elastic element 706, which is sleeved on the connector 705, with one end of the first elastic element 706 connected to the unlocking part 704 and the other end of the first elastic element 706 connected to the outer peripheral surface of the rotating member 500; during the process of the rotating member 500 moving from the starting end 721 to the ending end 722, the first elastic element 706 is compressed until the rotating member 500 rotates to the predetermined position, at which point the first elastic element 706 naturally extends so that the abutting surface 703 abuts against the end face of the ending end 722.

[0047] In some embodiments, the unlocking part 704 and the connector 705 are integrally formed; or the unlocking part 704 and the connector 705 are separately formed.

[0048] In this embodiment, a notch is provided on the circumferential surface of the rotating member 500, and the locking member 710 is disposed entirely through the notch. The abutting part 701 is located on one side of the inner circumferential surface of the rotating member 500, and the unlocking part 704 is located on one side of the outer circumferential surface of the rotating member 500. One end of the first elastic element 706 is connected to the unlocking part 704, and the other end is connected to the outer circumferential surface of the rotating member 500, so that the locking member 710 is fixed to the rotating member 500. At the same time, the first elastic element 706 expands or contracts in the radial direction of the rotating member 500, and correspondingly, the locking member 710 is displaced in the radial direction of the rotating member 500.

[0049] In specific implementation, the locking process of the locking mechanism 700 is as follows: Before the locking member 710 contacts the mating member 720, the first elastic element 706 is in a first compressed state, and the locking member 710 is in a first position; until the locking member 720 contacts the starting end 721 of the mating member 720, at this time, the first elastic element 706 is in a second compressed state, and the locking member 710 is in a second position. The second position of the locking member 710 is closer to the center of the rotating member 500 than the first position, and the compression amount of the second compressed state is greater than the compression amount of the first compressed state; then, the locking member 710 moves along the starting end 721 to the end... At end 722, the first elastic element 706 is in the third compression state, and the locking member 710 is in the third position. During the process from the second compression state to the third compression state, the compression amount of the first elastic element 706 gradually increases, and the locking member 710 gradually approaches the center of the rotating member 500. Finally, the rotating member 500 rotates further along the first direction X, and the locking member 710 reaches the predetermined position. At this time, the compression amount of the first elastic element 706 is naturally released, and the locking member 710 is displaced in a direction away from the center of the rotating member 500, so that the contact surface 703 contacts the end face of end 722, thereby locking the locking member 710 and the mating member 720.

[0050] In this embodiment, the unlocking part 704 is adapted to move in the radial direction of the rotating member 500 when pressed, thereby causing the abutting part 701 to move in the radial direction of the rotating member, so that the abutting part 701 is separated from the mating member 720.

[0051] In specific implementation, the unlocking process of the locking mechanism 700 is as follows: Press the unlocking part 704 to compress the first elastic element 706. The unlocking part 704 moves closer to the center of the rotating member 500, causing the abutting part 701 to move closer to the center of the rotating member 500. This causes the abutting surface 703 of the abutting part 701 to separate from the end face of the end 722. Then, under the elastic restoring force of the contraction member 600, the rotating member 500 rotates in the second direction, and the locking member 710 and the mating member 720 completely move away from each other, thereby unlocking the locking mechanism 700. At the same time, the contraction member 600 retracts to the periphery of the fixed base 100, releasing the fixation of the conduit 10 and thus releasing the conduit 10.

[0052] In this embodiment, the first elastic element 706 is a spring.

[0053] The locking mechanism 700 provided in this embodiment has a simple structure and is very convenient for locking and unlocking operations, which can realize the rapid fixation and release of the catheter 10.

[0054] The catheter fixation device 1 provided in this embodiment of the invention can be anchored to human tissue, thereby achieving the fixation of the catheter 10 to the human tissue. The structure of the catheter fixation device 1 anchored to the human tissue will be described below.

[0055] Continue to refer to Figure 5 The catheter fixation device 1 further includes: a sleeve rod assembly 200, which includes an inner rod 201 and an outer rod 202 sleeved outside the inner rod 201. The inner rod 201 and the outer rod 202 partially pass through the hollow chamber 101, and the upper ends of the inner rod 201 and the outer rod 202 are adapted to move axially Z within the hollow chamber 101; and a deformable fixing member 300, the top end 301 of which is connected to the outer rod 202, and the bottom end 302 of which is connected to the inner rod 201. The deformable fixing member 300 can undergo radial expansion deformation when the inner rod 201 and the outer rod 202 undergo relative axial displacement, so as to anchor itself inside the human tissue 20.

[0056] The end of the sleeve assembly 200 away from the fixed base 100 is inserted into the human tissue 20. At the same time, the deformable fastener 300 provided on the sleeve assembly undergoes radial expansion deformation when the inner rod 201 and the outer rod 202 undergo relative axial displacement. The radially expanded part is locked on the human tissue 20, thereby anchoring it to the human tissue 20.

[0057] In this embodiment, the deformable fixing member 300 is disposed at the end of the sleeve assembly 200 away from the fixed base 100, and is inserted into the human tissue 20 at the same time as the end of the sleeve assembly 200 away from the fixed base 100.

[0058] Furthermore, the top end 301 and bottom end 302 of the deformable fastener 300 are connected by an elastically deformable structure 303. When the top end 301 and bottom end 302 of the deformable fastener 300 are relatively displaced in the axial direction Z, the elastically deformable structure 303 expands or contracts in the radial direction.

[0059] Specifically, when the top end 301 and bottom end 302 of the deformable fastener 300 approach each other in the axial Z direction, the elastic deformable structure 303 expands in the radial direction; when the top end 301 and bottom end 302 of the deformable fastener 300 move away from each other in the axial Z direction, the elastic deformable structure 303 contracts in the radial direction.

[0060] In some embodiments, the elastic deformable structure 303 is made of thermoplastic material, polycarbonate (PC) material or polyetheretherketone (PEEK) material, etc.

[0061] In some embodiments, the deformable fastener 300 may be integrally formed with the outer rod 202; or, the deformable fastener 300 may be formed separately from the outer rod 202.

[0062] Continue to refer to Figure 5 The catheter fixing device 1 further includes a second elastic element 400, which is disposed in the hollow cavity 101 and sleeved on the outside of the sleeve rod assembly 200. The bottom end of the second elastic element 400 is connected to the fixing base 100, and the top end of the second elastic element 400 is connected to the top end of the inner rod 201.

[0063] In this embodiment, the inner rod 201 includes an inner rod body 204 and a limiting member 205 located at the top of the inner rod body 204, and the top end of the second elastic element 400 abuts against the lower part of the limiting member 205.

[0064] In this embodiment, the second elastic element 400 is a spring; in other embodiments, the second elastic element 400 may also be other alternative components such as elastic rubber parts or elastic bellows.

[0065] In this embodiment, the second elastic element 400 can be compressed or extended in the axial direction Z. When the sleeve assembly 200 moves away from the fixed base 100, the second elastic element 400 is compressed; conversely, when the second elastic element 400 extends, it can drive the sleeve assembly 200 to move closer to the fixed base 100.

[0066] In specific implementation, during the process of inserting the sleeve assembly 200 into the human tissue 20, the elastic element 400 is compressed so that the end of the sleeve assembly 200 penetrates as deeply as possible into the human tissue 20. For some thicker human tissues 20, the deformable fastener 300 can also be completely located inside the human tissue 20, avoiding the problem of the deformable fastener 300 failing to deform properly and causing fixation failure. After the human tissue 20 is inserted, the elastic element 400 extends, and its elastic force provides a driving force for the axial movement of the inner rod 201, causing the inner rod 201 to move towards the fixed base 100. This causes relative displacement between the inner rod 201 and the outer rod 202 in the axial Z direction, thereby causing the deformable fixing member 300 to undergo radial expansion deformation. When the deformable fixing member 300 achieves maximum deformation, it can move the outer rod 202 towards the fixed base 100 in conjunction. For some thinner human tissues 20, the movement of the outer rod 202 causes the top end 301 of the deformable fixing member 300 to move until the top end 301 of the deformable fixing member 300 abuts against the surface of the human tissue 20, thereby locking the deformable fixing member 300 with the human tissue 20 and preventing loosening.

[0067] In some embodiments, the movable stroke of the sleeve assembly 200 within the hollow chamber 101 is 10mm to 40mm. The movable stroke of the outer rod 202 and the inner rod 201 within the hollow chamber 101 determines the axial Z-direction movement stroke of the deformable fixing member 300 and its degree of deformation. Setting the movable stroke within a suitable range allows the sleeve assembly 200 to be adapted to human tissues of different thicknesses.

[0068] In this embodiment, the diameter of the top end of the inner rod 201 is larger than the diameter of the top opening of the hollow cavity 101.

[0069] Specifically, the diameter of the limiting member 205 of the inner rod 201 is larger than the diameter of the top opening of the hollow cavity 101, thereby limiting the displacement of the inner rod 201 within the hollow cavity 101 and preventing it from extending outside the hollow cavity 101.

[0070] In this embodiment, the top end of the outer rod 202 is located below the limiting member 205 of the inner rod 201, so that the displacement of the outer rod 202 is restricted by the inner rod 201, and the displacement of the outer rod 202 is also restricted within the hollow cavity 101.

[0071] refer to Figure 6 Accordingly, this embodiment of the invention also provides an integrated device for fixing a puncture catheter, including the aforementioned catheter fixing device 1 and a puncture device 2, wherein the puncture device 2 is removably connected to the catheter fixing device 1.

[0072] In this embodiment, the puncture device 2 is used to construct a channel in the human tissue 20. After the channel is constructed, it can be removed from the catheter fixation device 1, and then the catheter 10 can be inserted into the human tissue 20 through the channel. The catheter fixation device 1 fixes the catheter 10 to the human tissue 20.

[0073] Continue to refer to Figure 6 The puncture device 2 includes: a housing 30; a pressing assembly disposed within the housing 30, the pressing assembly including a pressing part 41 and a pressing rod 42, the pressing part 41 being disposed at the top of the pressing rod 42, the pressing rod 42 being adapted to move downward along the axial direction Z of the housing 30 under the pressing of the pressing part 41; and a puncture assembly including a puncture rod 51, the top of the puncture rod 51 being connected to the bottom of the pressing rod 42, the puncture rod 51 being adapted to... Driven by the pressing rod 42, it moves downward along the axial direction Z of the housing 30 to the first position; a fixed limiting assembly is formed, which includes a first limiting member 711 and a first fixing member 713. The first limiting member 711 is connected to the puncture rod 51, and the first fixing member 713 is disposed inside the housing 30. The first limiting member 711 and the first fixing member 713 cooperate with each other when the puncture rod 51 is in the first position, so that the puncture rod 51 is locked in the first position.

[0074] In this embodiment, the lower end of the housing 30 of the puncture device 2 includes an external insertion part and an internal insertion part. When the puncture device 2 is installed on the catheter fixing device 1, the external insertion part surrounds the outside of the rotating member 500, and the bottom end of the external insertion part abuts against the base 102 of the fixing base 100. The internal insertion part is inserted into the hollow chamber 101, and the bottom end of the internal insertion part abuts against the top end of the sleeve assembly 200. When the puncture device 2 is pressed downward, the internal insertion part drives the sleeve assembly 200 to move downward and penetrate into the human tissue 20.

[0075] In this embodiment, when no puncture operation is performed, the puncture device 2 is in the initial position, with the puncture rod 51 hidden inside the sleeve assembly 200. When a puncture operation is required, the pressing part 41 is pressed, which drives the pressing rod 42 to move downward along the Z-axis, and simultaneously drives the puncture rod 51 to move downward along the Z-axis until it reaches the first position. At this time, the first limiting member 711 and the first fixing member 713 cooperate with each other to fix the position of the puncture rod 51. Even if the pressing part 41 is no longer pressed, the puncture rod 51 can still remain in the first position. At this time, when performing a puncture operation on human tissue 20, the operator's hands can be freed. The operator can hold the rod with both hands to improve the stability of the puncture, and can also more accurately grasp the timing and location of the puncture, which is conducive to improving the surgical effect and helping the patient recover faster.

[0076] In this embodiment, the pressing assembly further includes a pressing elastic element 43, which is sleeved on the outside of the pressing rod 42. One end of the pressing elastic element 43 is connected to the pressing part 41, and the other end of the pressing elastic element 43 is fixed inside the housing 30.

[0077] Specifically, a support plate 44 is provided inside the housing 30, and the other end of the pressing elastic element 43 is fixed on the support plate 44.

[0078] In this embodiment, the support plate 44 divides the interior of the housing 30 into an upper chamber and a lower chamber. The pressing part 41 and the pressing elastic element 43 are located in the upper chamber. The support plate 44 has a central through hole. The pressing rod 42 passes through the central through hole of the support plate 44. Part of the pressing rod 42 is located in the upper chamber and part is located in the lower chamber.

[0079] In this embodiment, when the pressing part 41 is pressed down, the pressing rod 42 moves downward along the axial direction Z, while compressing the pressing elastic element 43. Through the cooperation of the first limiting member 711 and the first fixing member 713, even if the pressing part 41 is not continuously pressed, the pressing rod 42 will not be affected by the elastic force of the pressing elastic element 43 and will automatically retract upward, thereby keeping the puncture rod 51 in the first position.

[0080] In this embodiment, the pressing elastic element 43 is a spring.

[0081] Furthermore, when the bottom of the puncture rod 51 is subjected to force, the puncture rod 51 is adapted to move along the axial direction Z of the housing 30 to a second position, the second position being closer to the top of the housing 30 than the first position; the fixing and limiting assembly includes a second limiting member 712 and a second fixing member 714, the second limiting member 712 being connected to the puncture rod 51, and the second fixing member 714 being disposed within the housing 30, the second limiting member 712 and the second fixing member 714 cooperating with each other when the puncture rod 51 is in the second position, so that the puncture rod 51 is locked in the second position.

[0082] In this embodiment, during the puncture operation, the bottom of the puncture rod 51 contacts the human tissue 20. The human tissue 20 provides a force to the puncture rod 51 in the opposite direction of puncture. During the process of penetrating the human tissue 20, this force causes the puncture rod 51 to move upward along the Z-axis to the second position. At this time, through the cooperation of the second limiting member 712 and the second fixing member 714, the puncture rod 51 is locked in the second position, preventing the puncture rod 51 from returning to the initial position and thus being unable to continue penetrating the human tissue. In addition, it is never necessary to manually press the pressing part 41 during this process.

[0083] In this embodiment, the first limiting member 711 and the second limiting member 712 are connected to the puncture rod 51, so the positions of the first limiting member 711 and the second limiting member 712 change with the change of the puncture rod 51.

[0084] Furthermore, the puncture device also includes: a linkage reset mechanism, which is connected between the pressing rod 42 and the puncture rod 51. The linkage reset mechanism includes: an upper linkage 61, which is hinged to the bottom of the pressing rod 42; a lower linkage 62, one end of which is hinged to the top of the puncture rod 51, and the other end of which is hinged to the upper linkage 61; and a reset elastic element 63, both ends of which are fixed to the hinge points of the lower linkage 62 and the upper linkage 61, respectively.

[0085] In this embodiment, an upper connecting seat 64 is provided at the bottom of the pressing rod 42, and the upper connecting rod 61 is hinged to the upper connecting seat 64; a lower connecting seat 65 is provided at the top of the piercing rod 51, and the lower connecting rod 62 is hinged to the lower connecting seat 65.

[0086] In this embodiment, the upper connecting rod 61 and the lower connecting rod 62 are hinged to each other to form a closed quadrilateral structure. When the upper connecting seat 64 or the lower connecting seat 65 is subjected to an axial force Z, the upper connecting seat 64 and the lower connecting seat 65 move closer to each other, causing the reset elastic element 63 to stretch in a direction perpendicular to the axial direction Z and accumulate elastic restoring force. When the force on the upper connecting seat 64 or the lower connecting seat 65 disappears, under the action of the elastic restoring force of the reset elastic element 63, the upper connecting seat 64 and the lower connecting seat 65 naturally move away from each other, realizing the reset of the position.

[0087] In this embodiment, the reset elastic element 63 is a spring.

[0088] Specifically, the upper connecting rod 61 includes a first upper connecting rod 611 and a second upper connecting rod 612 symmetrically arranged in a direction perpendicular to the axial direction Z. One end of the first upper connecting rod 611 and the second upper connecting rod 612 are hinged to the bottom of the pressing rod 42. The lower connecting rod 62 includes a first lower connecting rod 621 and a second lower connecting rod 622 symmetrically arranged in a direction perpendicular to the axial direction Z. One end of the first lower connecting rod 621 and the second lower connecting rod 622 are hinged to the top of the piercing rod 51. The other end of the first lower connecting rod 621 is hinged to the first upper connecting rod 611, and the other end of the second lower connecting rod 622 is hinged to the second upper connecting rod 612. One end of the reset elastic element 63 is fixed to the hinge point between the first lower connecting rod 621 and the first upper connecting rod 611, and the other end of the reset elastic element 63 is fixed to the hinge point between the second lower connecting rod 622 and the second upper connecting rod 612.

[0089] In this embodiment, one end of the first upper connecting rod 611 and the second upper connecting rod 612 are hinged together to the upper connecting seat 64, and one end of the first lower connecting rod 621 and the second lower connecting rod 622 are hinged together to the lower connecting seat 65.

[0090] In this embodiment, the first limiting member 711 is disposed on the ends of the first upper connecting rod 611 and the second upper connecting rod 612 away from the pressing rod 42.

[0091] In this embodiment, the first limiting member 711 is disposed on the side of the first upper connecting rod 611 and the second upper connecting rod 612 facing the piercing rod 51.

[0092] Specifically, the first limiting member 711 is an inner boss provided on the first upper connecting rod 611 and the second upper connecting rod 612, and the first fixing member 713 is an inner groove provided on the inner wall of the housing 30 along the circumference of the housing 30. When the piercing rod 51 is in the first position, the inner boss is adapted to be embedded in the inner groove.

[0093] In this embodiment, the second limiting member 712 is disposed on the ends of the first upper connecting rod 611 and the second upper connecting rod 612 away from the pressing rod 42.

[0094] In this embodiment, the second limiting member 712 is disposed on the side of the first upper connecting rod 611 and the second upper connecting rod 612 facing away from the piercing rod 51.

[0095] Specifically, the second limiting member 712 is an outer protrusion provided on the first upper connecting rod 611 and the second upper connecting rod 612, and the second fixing member 714 is an outer groove provided on the inner wall of the housing 30 along the circumference of the housing 30. When the piercing rod 51 is in the second position, the outer protrusion is adapted to be embedded in the outer groove.

[0096] In specific implementation, firstly, the pressing part 41 is pressed, compressing the elastic element 43. The pressing rod 42 moves downward along the Z-axis, driving the puncture rod 51 to move downward along the Z-axis. The position of the upper connecting rod 61 changes with the change of the puncture rod 51. Under the action of the pressing force, the upper connecting seat 64 and the lower connecting seat 65 move closer to each other, and the reset elastic element 63 is stretched to both sides. The included angle between the first upper connecting rod 611 and the second upper connecting rod 612 increases until the first position is reached. The pressing part 41 is then released. During this period, under the elastic restoring force of the reset elastic element 63, the included angle between the first upper connecting rod 611 and the second upper connecting rod 612 becomes smaller. At this time, the inner bosses provided on the first upper connecting rod 611 and the second upper connecting rod 612 engage with the inner grooves provided on the housing 30, thereby fixing the position of the puncture rod 51. The puncture rod 51 is not affected by the rebound, and the operator does not need to keep pressing the pressing part 41. The operation is more stable, and the timing and position of the puncture rod 51 piercing the human tissue 20 are more accurate.

[0097] Then, the puncture rod 51 is inserted into the human tissue 20. The human tissue 20 exerts an upward reaction force on the puncture rod 51. The lower connecting seat 65 is forced to move closer to the upper connecting seat 64. The reset elastic element 63 is stretched to both sides, and the included angle between the first upper connecting rod 611 and the second upper connecting rod 612 increases. The inner boss separates from the inner groove. The puncture rod 51 continues to move upward to the second position. The outer bosses provided on the first upper connecting rod 611 and the second upper connecting rod 612 engage with the outer groove provided on the housing 30, thus firmly locking the puncture rod 51 and preventing it from being affected by springback.

[0098] Finally, the puncture rod 51 is inserted into the human tissue. The puncture rod 51 is not under force. Under the influence of the return elastic element 63 and the rebound force of the pressing elastic element 43, the upper connecting seat 64 and the lower connecting seat 65 move away from each other. The upper connecting rod 61 and the lower connecting rod 62 retract towards the central axis of the housing 30. The outer boss disengages from the inner groove. The puncture rod 51 rebounds and returns to the initial position. The puncture rod 51 is hidden inside the sleeve assembly 200 to avoid the tip of the puncture rod 51 from damaging the internal human tissue.

[0099] Furthermore, the linkage reset mechanism also includes a limiting rod 66, which is arranged parallel to the reset elastic element 63. One end of the limiting rod 66 is fixed to the first upper connecting rod 611 or the second upper connecting rod 612. The limiting rod 66 is used to limit the minimum opening and closing angle between the first upper connecting rod 611 and the second upper connecting rod 612.

[0100] In this embodiment, one end of the limiting rod 66 is fixed to the second upper connecting rod 612, and the other end of the limiting rod 66 faces the first upper connecting rod 611. When the upper connecting seat 64 and the lower connecting seat 65 move away from each other, the first upper connecting rod 611 and the second upper connecting rod 612 move closer to each other until the other end of the limiting rod 66 abuts against the first upper connecting rod 611, preventing the first upper connecting rod 611 and the second upper connecting rod 612 from moving closer together, thus limiting the minimum opening and closing angle between the first upper connecting rod 611 and the second upper connecting rod 612, thereby avoiding excessive retraction of the piercing rod 51.

[0101] In other embodiments, one end of the limiting rod 66 may also be fixed to the first upper connecting rod 611, and the other end of the limiting rod 66 may face the second upper connecting rod 612.

[0102] In this embodiment, a channel is constructed in the human tissue by means of the puncture rod 51, and then the puncture device 2 is removed. The catheter 10 is inserted into the human tissue through the channel and fixed to the human tissue by means of the catheter fixing device 1.

[0103] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A catheter fixation device, characterized in that, include: A fixed base having a central channel through which the conduit passes; A rotating component, which is rotatably mounted on the fixed base; A shrinkable member, one end of which is disposed on the rotating member and the other end of which is disposed on the fixed base, wherein the shrinkable member is adapted to shrink toward the center of the fixed base when the rotating member rotates in a first direction, so as to fix the conduit located in the central channel; A locking mechanism having a locked state and an unlocked state; in the locked state, the locking mechanism locks the rotating member in a predetermined position; in the unlocked state, the rotating member is adapted to rotate in a second direction opposite to the first direction, and the retracting member retracts to the periphery.

2. The catheter fixation device according to claim 1, characterized in that, The shrinking member is a flexible shrinking member, which is adapted to stretch and deform to generate elastic restoring force when the rotating member rotates in the first direction.

3. The catheter fixation device according to claim 2, characterized in that, The shrink-fit component is made of a flexible film.

4. The catheter fixation device according to claim 2, characterized in that, The locking mechanism includes a locking member and a mating member. The locking member is disposed on the rotating member, and the mating member is disposed on the fixed base. In the locked state, the locking member and the mating member abut against each other. The elastic restoring force acts on the locking member, and the mating member provides a supporting force to the locking member in the opposite direction to the elastic restoring force, so that the locking member abuts against the mating member.

5. The catheter fixation device according to claim 4, characterized in that, The mating component includes a starting end and an ending end disposed along the first direction. From the starting end to the ending end, the width of the mating component gradually increases, and the end face of the ending end is adapted to abut against the locking component.

6. The catheter fixation device according to claim 5, characterized in that, The locking member includes an abutting portion, which includes a transition surface and an abutting surface. During the process of the rotating member rotating along the first direction to the predetermined position, the transition surface moves along the starting end of the mating member to the end end, and the abutting surface is adapted to abut against the end face of the end at the predetermined position.

7. The catheter fixation device according to claim 6, characterized in that, During the process of the rotating component rotating along the first direction to the predetermined position, the end of the transition surface that initially contacts the mating component is set as an arc-shaped surface.

8. The catheter fixation device according to claim 6, characterized in that, The locking component further includes: an unlocking part, which is connected to the abutting part via a connector; and a first elastic element, which is sleeved on the connector, with one end of the first elastic element connected to the unlocking part and the other end of the first elastic element connected to the outer peripheral surface of the rotating component; during the process of the rotating component moving from the starting end to the ending end, the first elastic element is compressed until the rotating component rotates to the predetermined position, at which point the first elastic element naturally stretches so that the abutting surface abuts against the end face of the ending end.

9. The catheter fixation device according to claim 8, characterized in that, The unlocking part is adapted to move in the radial direction of the rotating member when pressed, thereby causing the abutting part to move in the radial direction of the rotating member, so as to separate the abutting part from the mating part.

10. An integrated device for fixing a puncture catheter, characterized in that, It includes a puncture device and a catheter fixation device as described in any one of claims 1 to 9, wherein the puncture device is removably disposed on the catheter fixation device.

Images