An ECMO cannula

Abstract

The present application relates to the technical field of medical devices, and discloses an ECMO cannula, which comprises a cannula, a connecting sleeve arranged on one side of the cannula, a needle arranged on one side of the connecting sleeve, a fixing assembly arranged on the cannula and comprising a fixing sleeve and a locking piece, the fixing sleeve being arranged on the outer side of the cannula, the locking piece comprising a rotating sleeve, the rotating sleeve being rotatably connected in the fixing sleeve, the inner side of the rotating sleeve being provided with a movable plate, and one side of the movable plate being provided with a pressing plate. The ECMO cannula can be stably fixed through the arrangement of the fixing assembly, so that the situation that the normal use of the ECMO cannula is affected by the over-tightening or over-loosening of the fixation of the ECMO cannula can be avoided, and when the ECMO cannula needs to be rotationally adjusted, the ECMO cannula can be rotated without being unfixed, so that the situation that the position of the ECMO cannula moves during the rotation can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an ECMO cannula. BACKGROUND

[0002] ECMO cannula refers to the operation process of inserting a special catheter into the large blood vessels (such as veins and arteries) of the human body through percutaneous puncture or surgical incision, so as to establish an extracorporeal circulation passage, so that blood can be drawn out of the body, processed by ECMO equipment for oxygenation and carbon dioxide discharge, and then returned to the body. During the use of the ECMO cannula, in order to avoid the ECMO cannula from moving due to external force, it needs to be fixed. However, if the fixing force is too tight, it will cause compression to the ECMO cannula, which will affect the normal flow of blood. If the fixing force is too loose, it may cause displacement of the ECMO cannula, which will not provide effective fixation to the ECMO cannula. In addition, when using ultrasonic real-time observation to observe the position of the cannula in the blood vessel, if the cannula is found to be deviated to one side of the blood vessel, it will affect the blood flow or cause damage to the blood vessel wall. Under the guidance of ultrasound, the cannula needs to be slightly rotated to return to the center position of the blood vessel to ensure smooth blood flow and reduce the stimulation to the blood vessel wall. However, when rotating the cannula, the fixation of the cannula needs to be released first, which not only increases the complexity of the operation, but also causes displacement of the cannula when the cannula is rotated after being released, which will change the depth of the cannula. SUMMARY

[0003] In view of the above problems existing in the existing ECMO cannula, the present application is proposed.

[0004] Therefore, the problem to be solved by the present application is that the ECMO cannula cannot be effectively fixed, and the position of the ECMO cannula will move when the ECMO cannula is rotated and adjusted.

[0005] To solve the above technical problems, the present application provides the following technical scheme: an ECMO cannula, comprising a cannula, a connecting sleeve is arranged on one side of the cannula, and a needle is arranged on one side of the connecting sleeve;

[0006] A fixing assembly is arranged on the cannula and comprises a fixing sleeve and a locking member. The fixing sleeve is located on the outer side of the cannula. The locking member comprises a rotating sleeve, which is rotatably connected in the fixing sleeve. An active plate is arranged on the inner side of the rotating sleeve. An extrusion plate is arranged on one side of the active plate. A groove corresponding to the extrusion plate is formed in the active plate. A positioning column is fixed on one side of the extrusion plate. One end of the positioning column penetrates through one side of the active plate and is movably connected with the active plate. A limiting spike is fixed on one side of the extrusion plate.

[0007] The fixed assembly further comprises a rotating piece, the rotating piece comprises a rotating ring, one side of the rotating ring is rotationally connected with the rotating sleeve, one side of the movable plate is fixedly connected with a guide shaft, a guide groove is formed in the rotating ring, the guide shaft is slidably arranged in the guide groove, a rotating ring is rotationally connected with the rotating ring, a through groove is formed in the rotating ring, a plug rod is arranged in the through groove, a plug hole is formed in the rotating ring, the bottom end of the plug rod is clamped in the plug hole, and a handle is fixedly arranged outside the rotating ring.

[0008] The fixed assembly further comprises a pushing piece, the pushing piece comprises a push rod, the push rod is located in the plug hole and in contact with the plug rod at the top end, an extrusion rod is inserted into one side of the rotating ring, the bottom end of the push rod is inclined, the end of the extrusion rod is in contact with the inclined surface of the bottom end of the push rod, an arc-shaped plate is fixedly arranged at one end of the extrusion rod, a stress rod is clamped in the arc-shaped plate, and an extrusion block is fixedly arranged at one end of the positioning column.

[0009] As a preferred scheme of the ECMO cannula, the fixed assembly further comprises a connecting piece, the connecting piece comprises a limiting rod, an active groove is formed in the rotating ring, the limiting rod is located in the active groove, an extrusion groove is formed in the push rod, one end of the limiting rod is inclined and located in the extrusion groove, a limiting hole is formed in one side of the rotating sleeve, the limiting rod corresponds to the limiting hole, a connecting block is fixedly arranged at the top of the limiting rod, and a first spring is fixedly arranged at one side of the connecting block.

[0010] As a preferred scheme of the ECMO cannula, the fixed assembly further comprises a rotating piece, the rotating piece comprises a rotating ring, one side of the rotating ring is rotationally connected with the rotating sleeve, one side of the movable plate is fixedly connected with a guide shaft, a guide groove is formed in the rotating ring, the guide shaft is slidably arranged in the guide groove, a rotating ring is rotationally connected with the rotating ring, a through groove is formed in the rotating ring, a plug rod is arranged in the through groove, a plug hole is formed in the rotating ring, the bottom end of the plug rod is clamped in the plug hole, and a handle is fixedly arranged outside the rotating ring.

[0011] As a preferred scheme of the ECMO cannula, the fixed assembly further comprises a limiting piece, the limiting piece comprises a movable rod, the movable rod is inserted into the handle, a cavity is formed in the movable rod, a limiting column is arranged in the cavity, a second spring is fixedly arranged at one end of the limiting column, and a positioning hole is formed in the plug rod, the limiting column corresponds to the positioning hole.

[0012] As a preferred scheme of the ECMO cannula, one side of the extrusion plate is fixedly connected with a third spring, the third spring is sleeved outside the positioning column and fixedly connected with the movable plate at the other end.

[0013] As a preferred scheme of the ECMO cannula, the fourth spring is fixed at the top end of the insertion rod, and the top end of the fourth spring is fixed to the inner wall of the through slot.

[0014] As a preferred scheme of the ECMO cannula, the support frame is fixed on one side of the rotating ring, the extrusion rod is movably connected in the support frame, the fifth spring is fixed on one side of the support frame, and the other end of the fifth spring is fixed to the arc-shaped plate.

[0015] As a preferred scheme of the ECMO cannula, the support rod is fixed inside the rotating sleeve, and the force receiving rod is movably connected in the support rod.

[0016] As a preferred scheme of the ECMO cannula, the plurality of limiting holes are arranged in an arc shape on one side of the rotating sleeve.

[0017] As a preferred scheme of the ECMO cannula, the plurality of limiting protrusions are arranged in a rectangular shape on one side of the extrusion plate, and the limiting protrusions are inclined.

[0018] The ECMO cannula can be stably fixed through the arrangement of the fixing assembly, so that the normal use of the ECMO cannula is not affected by the over-tightening or over-loosening of the ECMO cannula, and the ECMO cannula can be rotated without being fixed when it needs to be rotated, so that the position of the ECMO cannula is not moved during rotation. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0020] Figure 1 It is the overall view of the ECMO cannula.

[0021] Figure 2 It is the structure diagram of the fixing sleeve of the ECMO cannula.

[0022] Figure 3 It is the side view structure diagram of the fixing sleeve of the ECMO cannula.

[0023] Figure 4 It is the structure diagram of the locking piece of the ECMO cannula.

[0024] Figure 5The cross-sectional structure diagram of the rotating sleeve of the ECMO cannula.

[0025] Figure 6 The rotating sleeve of the ECMO cannula Figure 5 The local enlarged structure diagram at A in the middle.

[0026] Figure 7 The rotating sleeve of the ECMO cannula Figure 5 The local enlarged structure diagram at B in the middle.

[0027] Figure 8 The local cross-sectional structure diagram of the rotating sleeve of the ECMO cannula from another perspective.

[0028] Figure 9 The rotating sleeve of the ECMO cannula Figure 8 The local enlarged structure diagram at C in the middle.

[0029] Figure 10 The side view structure diagram of the rotating sleeve of the ECMO cannula.

[0030] In the figure: 101, cannula; 102, connecting sleeve; 103, needle; 200, fixing assembly; 201, fixing sleeve; 202, locking piece; 202a, rotating sleeve; 202b, movable plate; 202c, extrusion plate; 202b-1, groove; 202d, positioning column; 202e, limiting protrusion; 203, rotating piece; 203a, rotating ring; 203b, guide shaft; 203a-1, guide groove; 203c, rotating ring; 203c-1, through groove; 203d, insertion rod; 203a-2, insertion hole; 203e, handle; 204, pushing piece; 204a, push rod; 204b, extrusion rod; 204c, arc plate; 204d, force receiving rod; 204e, extrusion block; 205, connecting piece; 205a, limiting rod; 203a-3, movable groove; 204a-1, extrusion groove; 202a-1, limiting hole; 205b, connecting block; 205c, first spring; 206, rotating piece; 206a, rotating rod; 202a-2, rotating groove; 206b, fixed shaft; 206c, torsional spring; 206d, force receiving block; 207, limiting piece; 207a, movable rod; 207a-1, cavity; 207b, limiting column; 207c, second spring; 203d-1, positioning hole; 202f, third spring; 203f, fourth spring; 203g, support frame; 203h, fifth spring; 203i, support rod. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0032] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details set forth in this description. In other instances, well-known methods, procedures, components, and circuits have not been described in detail as not to unnecessarily obscure aspects of the present application.

[0033] Secondly, the "one embodiment" or "an embodiment" referred to herein means a specific feature, structure, or characteristic under discussion. Each of the various embodiments presented in the specification are not necessarily mutually exclusive, but can be combined with each other in various ways. Moreover, each of the embodiments presented in the specification can be combined with other embodiments presented in the specification in various ways.

[0034] Embodiment 1

[0035] With reference to Figures 1-7 For the first embodiment of the present application, the embodiment provides an ECMO cannula, the ECMO cannula comprises a cannula 101, the cannula 101 is provided with a connecting sleeve 102 on one side, and the connecting sleeve 102 is provided with a needle 103 on one side.

[0036] The other end of the cannula 101 is connected with an ECMO device, the connecting sleeve 102 is used for connecting the needle 103 with the cannula 101, and the needle 103 is used for being inserted into a large blood vessel of a patient, which is prior art and will not be described in detail.

[0037] The fixing assembly 200 is arranged on the cannula 101 and comprises a fixing sleeve 201 and a locking piece 202. The fixing sleeve 201 is located outside the cannula 101. The locking piece 202 comprises a rotating sleeve 202a, which is rotatably connected in the fixing sleeve 201. The rotating sleeve 202a is provided with a movable plate 202b on the inner side. The movable plate 202b is provided with a pressing plate 202c on one side. The movable plate 202b is provided with a groove 202b-1 corresponding to the pressing plate 202c. The pressing plate 202c is fixedly provided with a positioning column 202d on one side. The positioning column 202d penetrates through one end of the movable plate 202b and is movably connected with the movable plate 202b. The pressing plate 202c is fixedly provided with a limiting thorn 202e on one side.

[0038] The fixing sleeve 201 is fixedly provided with an adhesive bandage at the bottom, which is used for sticking the fixing sleeve 201 on a designated position of a patient's body. The number of the movable plate 202b and the pressing plate 202c is four, which are arranged in the rotating sleeve 202a in a ring shape. The movable plate 202b and the pressing plate 202c are both in an arc shape.

[0039] When the cannula 101 is fixed, the movable plate 202b drives the extrusion plate 202c to move towards the cannula 101. When the extrusion plate 202c contacts the cannula 101, it is pushed in the opposite direction by the cannula 101, and moves into the recess 202b-1. When the extrusion plate 202c is completely inside the recess 202b-1, the movable plate 202b stops moving. At this time, the cannula 101 can be fixed by the extrusion plate 202c, and the fixing force is moderate, which will not affect the normal use of the cannula 101.

[0040] The limiting protrusions 202e are arranged to increase the friction between the extrusion plate 202c and the cannula 101, thereby further increasing the stability of the cannula 101 during fixation, and avoiding movement of the cannula 101.

[0041] The three positioning columns 202d on one extrusion plate 202c are arranged in a straight line on one side of the extrusion plate 202c. The positioning columns 202d are arranged to position the extrusion plate 202c and prevent the extrusion plate 202c from deviating during movement.

[0042] The fixing assembly 200 further comprises a rotating member 203. The rotating member 203 comprises a rotating ring 203a rotatably connected to one side of the rotating sleeve 202a. The movable plate 202b has a guide shaft 203b fixed on one side. The rotating ring 203a has a guide groove 203a-1. The guide shaft 203b slides in the guide groove 203a-1. The rotating ring 203a has a rotating ring 203c rotatably connected to the outside. The rotating ring 203c has a through groove 203c-1. The through groove 203c-1 has a plug 203d. The rotating ring 203a has a plug hole 203a-2. The bottom end of the plug 203d is clamped in the plug hole 203a-2. The rotating ring 203a has a handle 203e fixed on the outside.

[0043] The number of guide shafts 203b corresponds to the movable plate 202b. The guide groove 203a-1 is arc-shaped. When the plug 203d is clamped in the plug hole 203a-2, the rotating ring 203c is connected to the rotating ring 203a through the cooperation of the two, so that the rotating ring 203c can drive the rotating ring 203a to rotate when the rotating ring 203c rotates.

[0044] Rotating the handle 203e drives the rotating ring 203c to rotate. The rotating ring 203c drives the rotating ring 203a to rotate through the cooperation of the plug 203d and the plug hole 203a-2. When the rotating ring 203a rotates, the guide shaft 203b slides in the guide groove 203a-1. Through the cooperation of the two, the movable plate 202b can be driven to move, so that the movable plate 202b can drive the extrusion plate 202c to move.

[0045] The side opposite to the guide shaft 203b of the movable plate 202b is fixed with a stabilizing shaft, the side of the rotating sleeve 202a is closed and is provided with a stabilizing groove, the stabilizing shaft slides in the stabilizing groove, and the two are matched to limit the moving track of the movable plate 202b, so that the movable plate 202b cannot rotate when moving.

[0046] The fixing assembly 200 further comprises a pushing piece 204, the pushing piece 204 comprises a pushing rod 204a, the pushing rod 204a is located in the insertion hole 203a-2 and the top end is in contact with the insertion rod 203d, the rotating ring 203a is inserted with an extrusion rod 204b on one side, the bottom end of the pushing rod 204a is inclined, the end of the extrusion rod 204b is in contact with the inclined surface of the bottom end of the pushing rod 204a, the extrusion rod 204b is fixed with an arc-shaped plate 204c on one end, the arc-shaped plate 204c is clamped with a force receiving rod 204d, and the positioning column 202d is fixed with an extrusion block 204e on one end.

[0047] The side of the extrusion block 204e is inclined, one end inside the arc-shaped plate 204c is T-shaped, and the arc-shaped plate 204c is provided with a T-shaped groove.

[0048] When the extrusion plate 202c moves to the inside of the groove 202b-1, the positioning column 202d drives the extrusion block 204e to extrude the force receiving rod 204d, so as to drive the force receiving rod 204d and the arc-shaped plate 204c to move, and the extrusion rod 204b drives the bottom end inclined surface of the pushing rod 204a to extrude, so that the pushing rod 204a moves upward and drives the insertion rod 203d to move upward, so that the insertion rod 203d is separated from the insertion hole 203a-2, so as to separate the rotating ring 203a from the rotating ring 203a, so as to make the rotating ring 203a unable to rotate when rotating after fixing the insertion tube 101, so as to avoid the rotating ring 203a rotating too much, which will cause the force of fixing the insertion tube 101 to be too tight.

[0049] Embodiment 2

[0050] Reference Figures 3-9 This is the second embodiment of the application, which is based on the previous embodiment.

[0051] Specifically, the fixing assembly 200 further comprises a connecting piece 205, the connecting piece 205 comprises a limiting rod 205a, the rotating ring 203a is provided with a movable slot 203a-3, the limiting rod 205a is located in the movable slot 203a-3, the push rod 204a is provided with an extrusion slot 204a-1, one end of the limiting rod 205a is inclined, and located in the extrusion slot 204a-1, one side of the rotating sleeve 202a is provided with a limiting hole 202a-1, the limiting rod 205a corresponds to the limiting hole 202a-1, and the top of the limiting rod 205a is fixedly provided with a connecting block 205b, one side of the connecting block 205b is fixedly provided with a first spring 205c.

[0052] When the push rod 204a moves upwards, the end inclined surface of the limiting rod 205a is extruded through the extrusion slot 204a-1, so as to drive the limiting rod 205a to move, so that the limiting rod 205a enters the limiting hole 202a-1, and the rotating ring 203a and the rotating sleeve 202a are connected through cooperation, so that the rotating ring 203a can be prevented from rotating, so that the force for fixing the cannula 101 can be prevented from changing.

[0053] When the push rod 204a moves downwards and resets, the connecting block 205b can be driven to move through the first spring 205c, so that the connecting block 205b drives the limiting rod 205a to separate from the limiting hole 202a-1.

[0054] Specifically, the fixing assembly 200 further comprises a rotating piece 206, the rotating piece 206 comprises a rotating rod 206a, the rotating sleeve 202a is provided with a rotating slot 202a-2, a fixed shaft 206b is fixedly arranged in the rotating slot 202a-2, the rotating rod 206a is rotatably connected to the outer side of the fixed shaft 206b, a torsional spring 206c is fixedly arranged on the outer side of the fixed shaft 206b, the other end of the torsional spring 206c is fixedly connected to the inner side of the rotating rod 206a, a stress block 206d is fixedly arranged at the top end of the positioning column 202d, and the stress block 206d is inclined.

[0055] The bottom end of the rotating rod 206a is arc-shaped, the rotating rod 206a has a certain rotating space in the rotating slot 202a-2, the number of the stress blocks 206d is two, and the stress blocks 206d are located on both sides of the top end of the positioning column 202d and are fixed to the positioning column 202d at the middle position.

[0056] When it is necessary to make rotational adjustment to the cannula 101, only need to rotate the rotating rod 206a, at this time the bottom end of the rotating rod 206a will be in contact with the inclined surface of the force block 206d and apply a downward thrust to the force block 206d, through the force block 206d to drive the positioning column 202d and the extrusion plate 202c to move, so that the extrusion plate 202c increases the appropriate fixing force to the cannula 101, at this time the rotating rod 206a will be in contact with the inner wall of the rotating groove 202a-2, when the rotating rod 206a continues to rotate, it can push the rotating sleeve 202a to rotate, so that the rotating sleeve 202a drives the cannula 101 to rotate through the cooperation of the extrusion plate 202c, so as to make rotational adjustment to the cannula 101, and during the adjustment process, the cannula 101 does not need to be fixed, so as to reduce the complexity of operation, and avoid the displacement of the cannula 101 during the rotational adjustment.

[0057] The fixed shaft 206b is used for positioning the rotating rod 206a, and the torsional spring 206c is used for resetting the rotating rod 206a after rotation.

[0058] Specifically, the fixing assembly 200 further comprises a limiting piece 207, the limiting piece 207 comprises a movable rod 207a, the movable rod 207a is inserted into the handle 203e, a cavity 207a-1 is formed in the movable rod 207a, a limiting column 207b is arranged in the cavity 207a-1, one end of the limiting column 207b is fixed with a second spring 207c, a positioning hole 203d-1 is formed in the insertion rod 203d, and the limiting column 207b corresponds to the positioning hole 203d-1.

[0059] The end of the limiting column 207b is arc-shaped, the movable rod 207a is movably connected in the handle 203e, and the bottom end of the movable rod 207a is inserted into the insertion rod 203d; when the insertion rod 203d moves upward and separates from the insertion hole 203a-2, the limiting column 207b coincides with the positioning hole 203d-1, at this time the second spring 207c applies a thrust to the limiting column 207b, so that the limiting column 207b is clamped with the positioning hole 203d-1, and the position of the insertion rod 203d is locked through cooperation of the two, so that the insertion rod 203d can continuously separate from the insertion hole 203a-2.

[0060] Specifically, one side of the extrusion plate 202c is fixed with a third spring 202f, the third spring 202f is sleeved outside the positioning column 202d, and the other end is fixed with the movable plate 202b.

[0061] The third spring 202f is used for applying a thrust to the extrusion plate 202c, so that the extrusion plate 202c can separate from the recess 202b-1 when not in contact with the cannula 101.

[0062] Specifically, the fourth spring 203f is fixed at the top end of the insertion rod 203d, and the top end of the fourth spring 203f is fixed to the inner wall of the through slot 203c-1.

[0063] When the insertion rod 203d is in contact with the lock, the fourth spring 203f is used to apply a pushing force to the insertion rod 203d to reset it.

[0064] Embodiment 3

[0065] With reference to Figures 1-10 For the third embodiment of the present application, the embodiment is based on the first two embodiments.

[0066] Specifically, the support frame 203g is fixed on one side of the rotating ring 203a, the extrusion rod 204b is movably connected to the support frame 203g, the fifth spring 203h is fixed on one side of the support frame 203g, and the other end of the fifth spring 203h is fixed to the arc-shaped plate 204c.

[0067] The fifth spring 203h is used to apply a pushing force to the arc-shaped plate 204c so that it can move and reset.

[0068] Specifically, the support rod 203i is fixed to the inner side of the rotating sleeve 202a, and the force receiving rod 204d is movably connected to the support rod 203i.

[0069] The support rod 203i is used to support and position the force receiving rod 204d.

[0070] Specifically, the number of limiting holes 202a-1 is multiple, and they are evenly distributed on one side of the rotating sleeve 202a in an arc shape.

[0071] Through the arrangement of multiple limiting holes 202a-1, the limiting rod 205a can be clamped with the limiting hole 202a-1 when the rotating ring 203a rotates at any angle.

[0072] Specifically, the number of limiting protrusions 202e is multiple, and they are evenly distributed on one side of the extrusion plate 202c in a rectangular shape, and the limiting protrusions 202e are inclined.

[0073] The limiting protrusions 202e on both ends of one side of the extrusion plate 202c are inclined in opposite directions, which can form different reverse limiting forces on the insertion tube 101.

[0074] In use, when it is necessary to fix the insertion tube 101, the handle 203e drives the rotating ring 203c to rotate, and the rotating ring 203c drives the rotating ring 203a to rotate through the cooperation of the insertion rod 203d and the insertion hole 203a-2. When the rotating ring 203a rotates, the guide shaft 203b slides in the guide slot 203a-1, and the movable plate 202b can be moved through the cooperation of the two.

[0075] At this time, the movable plate 202b drives the extrusion plate 202c to move towards the insertion tube 101. When the extrusion plate 202c contacts the insertion tube 101, the extrusion plate 202c is pushed towards the inside of the groove 202b-1 due to the reverse thrust of the insertion tube 101. When the extrusion plate 202c completely enters the inside of the groove 202b-1, the positioning column 202d drives the extrusion block 204e to extrude the force receiving rod 204d, thereby pushing the force receiving rod 204d and the arc-shaped plate 204c to move, and the arc-shaped plate 204c drives the extrusion rod 204b to extrude the bottom end inclined surface of the push rod 204a, so that the push rod 204a moves upwards and pushes the insertion rod 203d to move upwards, so that the insertion rod 203d is separated from the insertion hole 203a-2, thereby separating the rotating ring 203c from the rotating ring 203a.

[0076] At this time, the extrusion plate 202c can be used to fix the insertion tube 101. After the insertion tube 101 is fixed, the rotating ring 203c cannot drive the rotating ring 203a to rotate when the rotating ring 203c rotates, so as to avoid the rotating ring 203a rotating too much, which can cause the insertion tube 101 to be fixed too tightly, thereby making the force of fixing the insertion tube 101 moderate, so as to avoid affecting the normal use of the insertion tube 101.

[0077] When it is necessary to rotate and adjust the insertion tube 101, the rotating rod 206a is only needed to be rotated. At this time, the bottom end of the rotating rod 206a contacts the inclined surface of the force receiving block 206d and applies a downward thrust to the force receiving block 206d. The force receiving block 206d drives the positioning column 202d and the extrusion plate 202c to move, so that the extrusion plate 202c increases the appropriate fixing force of the insertion tube 101. At this time, the rotating rod 206a contacts the inner wall of the rotating groove 202a-2. When the rotating rod 206a continues to rotate, the rotating sleeve 202a is pushed to rotate, so that the rotating sleeve 202a drives the insertion tube 101 to rotate through the cooperation of the extrusion plate 202c, thereby rotating and adjusting the insertion tube 101. During the adjustment process, the insertion tube 101 does not need to be fixed, so as to reduce the complexity of the operation and avoid the displacement of the insertion tube 101 during the rotation adjustment.

[0078] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. An ECMO cannula, characterized in that: The utility model relates to a safety needle device, including, The needle (103) is arranged on one side of the connecting sleeve (102), and the connecting sleeve (102) is arranged on one side of the cannula (101); The fixing assembly (200) is arranged on the cannula (101) and includes a fixing sleeve (201) and a locking part (202), the fixing sleeve (201) is located on the outside of the cannula (101), the locking part (202) includes a rotating sleeve (202a), the rotating sleeve (202a) is rotatably connected in the fixing sleeve (201), the inside of the rotating sleeve (202a) is provided with a movable plate (202b), one side of the movable plate (202b) is provided with a pressing plate (202c), the movable plate (202b) is provided with a recess (202b-1) corresponding to the pressing plate (202c), one side of the pressing plate (202c) is fixed with a positioning column (202d), one end of the positioning column (202d) penetrates to one side of the movable plate (202b) and is movably connected with the movable plate (202b), and one side of the pressing plate (202c) is fixed with a limiting thorn (202e); The fixing assembly (200) further includes a rotating part (203), the rotating part (203) includes a rotating ring (203a), the rotating ring (203a) is rotatably connected on one side of the rotating sleeve (202a), one side of the movable plate (202b) is fixed with a guide shaft (203b), the rotating ring (203a) is provided with a guide groove (203a-1), the guide shaft (203b) is slidably arranged in the guide groove (203a-1), the outside of the rotating ring (203a) is rotatably connected with a rotating ring (203c), the rotating ring (203c) is provided with a through groove (203c-1), the through groove (203c-1) is provided with a plug rod (203d), the rotating ring (203a) is provided with a plug hole (203a-2), the bottom end of the plug rod (203d) is clamped in the plug hole (203a-2), and the outside of the rotating ring (203a) is fixed with a handle (203e); The fixing assembly (200) further includes a pushing part (204), the pushing part (204) includes a push rod (204a), the push rod (204a) is located in the plug hole (203a-2) and the top end is in contact with the plug rod (203d), one side of the rotating ring (203a) is inserted with a pressing rod (204b), the bottom end of the push rod (204a) is inclined, the end of the pressing rod (204b) is in contact with the inclined surface of the bottom end of the push rod (204a), one end of the pressing rod (204b) is fixed with an arc-shaped plate (204c), the arc-shaped plate (204c) is clamped with a stress rod (204d), and one end of the positioning column (202d) is fixed with a pressing block (204e).

2. The ECMO cannula of claim 1, wherein: The fixed assembly (200) further comprises a connecting piece (205), the connecting piece (205) comprises a limiting rod (205a), the rotating ring (203a) is provided with a movable slot (203a-3), the limiting rod (205a) is located in the movable slot (203a-3), the push rod (204a) is provided with an extrusion slot (204a-1), one end of the limiting rod (205a) is inclined and located in the extrusion slot (204a-1), one side of the rotating sleeve (202a) is provided with a limiting hole (202a-1), the limiting rod (205a) corresponds to the limiting hole (202a-1), the limiting rod (205a) is fixed with a connecting block (205b) at the top, and one side of the connecting block (205b) is fixed with a first spring (205c).

3. The ECMO cannula of claim 2, wherein: The fixed assembly (200) further comprises a rotating piece (206), the rotating piece (206) comprises a rotating rod (206a), the rotating sleeve (202a) is provided with a rotating slot (202a-2), the rotating slot (202a-2) is fixed with a fixed shaft (206b), the rotating rod (206a) is rotatably connected with the outer side of the fixed shaft (206b), the outer side of the fixed shaft (206b) is fixed with a torsion spring (206c), the other end of the torsion spring (206c) is fixed with the inner side of the rotating rod (206a), and the top end of the positioning column (202d) is fixed with a stress block (206d).

4. The ECMO cannula of claim 2 or 3, wherein: The fixed assembly (200) further comprises a limiting piece (207), the limiting piece (207) comprises a movable rod (207a), the movable rod (207a) is inserted into the handle (203e), the movable rod (207a) is provided with a cavity (207a-1), the cavity (207a-1) is provided with a limiting column (207b), one end of the limiting column (207b) is fixed with a second spring (207c), and the plug rod (203d) is provided with a positioning hole (203d-1), and the limiting column (207b) corresponds to the positioning hole (203d-1).

5. The ECMO cannula of claim 4, wherein: One side of the extrusion plate (202c) is fixed with a third spring (202f), the third spring (202f) is sleeved on the outer side of the positioning column (202d) and the other end is fixed with the movable plate (202b).

6. The ECMO cannula of claim 5, wherein: The top end of the plug rod (203d) is fixed with a fourth spring (203f), and the top end of the fourth spring (203f) is fixed with the inner wall of the through groove (203c-1).

7. The ECMO cannula of claim 5 or 6, wherein: One side of the rotating ring (203a) is fixed with a supporting frame (203g), the extrusion rod (204b) is movably connected in the supporting frame (203g), one side of the supporting frame (203g) is fixed with a fifth spring (203h), and the other end of the fifth spring (203h) is fixed with the arc-shaped plate (204c).

8. The ECMO cannula of claim 7, wherein: The rotating sleeve (202a) is fixed with a support rod (203i) inside, and the force rod (204d) is movably connected with the support rod (203i) inside.

9. The ECMO cannula of claim 8, wherein: The number of the limiting holes (202a-1) is multiple, and the limiting holes (202a-1) are evenly distributed in an arc shape on one side of the rotating sleeve (202a).

10. The ECMO cannula of claim 8 or 9, wherein: The number of the limiting protrusions (202e) is multiple, and the limiting protrusions (202e) are evenly distributed in a rectangular shape on one side of the extrusion plate (202c), and the limiting protrusions (202e) are inclined.

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