Vascular puncture dilator for ECMO

Abstract

The utility model discloses a vascular puncture dilator for ECMO relates to dilator technical field. Specifically including dilatation spare and adjusting spare, dilatation spare is a hollow cylinder, and it has open line one in length direction, adjusting spare sets up in the inner wall of dilatation spare, and it is equipped with the open line two of placing guide wire in length direction, wherein, adjusting spare can rotate relative to the axis of dilatation spare, and make open line two and open line one can be selected coincident, to with guide wire from open line two and open line one separate. Dilatation spare and adjusting spare are provided with open line one and open line two respectively, and guide wire can move from open line one to open line two, when open line two and open line one coincide, dilatation spare removes the puncture part, can directly from guide wire on the change, avoided the dilator and needed the guide wire to exit, reduced the time of dilator from guide wire and took out, reduced the amount of bleeding of patient blood vessel after dilatation.

Description

Technical Field

[0001] This utility model relates to the field of dilator technology, and in particular to a vascular puncture dilator for ECMO. Background Technology

[0002] An ECMO expander, also known as an expander, is a tool used during ECMO (extracorporeal membrane oxygenation) cannulation. It is mainly used to expand subcutaneous tissue and blood vessels so that the ECMO cannula can be successfully inserted.

[0003] The following steps should be followed when using a puncture dilator:

[0004] 1. Puncture and guidewire placement: First, the guidewire is placed into the blood vessel through the puncture needle, and then the puncture needle is removed, leaving the guidewire in the blood vessel.

[0005] 2. Skin and subcutaneous tissue incision: Based on the diameter of the cannula, incise the skin and subcutaneous tissue to prepare for the use of the expander.

[0006] 3. Gradual dilation: Use dilators of varying sizes, from small to large, to dilate the subcutaneous tissue and widen the puncture site. The outer diameter of the dilator must not exceed the outer diameter of the ECMO cannula.

[0007] 4. ECMO cannula insertion: After completing the dilation of subcutaneous tissue and blood vessels, the ECMO infusion and drainage cannulas are inserted along the guidewire.

[0008] 5. Confirm the cannulation position: After the blood vessel is basically inserted through the side hole, withdraw the cannula to the marker point, then gently insert the cannula and use ultrasound positioning to confirm that the cannula has been delivered to the required position.

[0009] 5. Connecting the ECMO tubing: The guidewire and sheath are withdrawn simultaneously, the tubing is clamped shut with a clamp, and the cannula is connected to the ECMO tubing under sterile conditions.

[0010] In existing technology, when a guidewire is inserted into a blood vessel and a dilator is used to gradually dilate the vessel, the dilator is inserted from the end of the guidewire and moved along the shape of the guidewire to the patient's puncture site. The dilator is then inserted into the patient's blood vessel to complete the dilation action. When a larger dilator is needed after dilation, the dilator is withdrawn from the artery and pulled out from the end along the direction of the guidewire. The larger dilator is then inserted from the end of the guidewire and inserted into the patient's artery again to achieve the vascular dilation action.

[0011] During the above process, as the dilator is inserted and withdrawn from the end of the guidewire, it takes time for medical staff to straighten the guidewire and move the dilator. During the repeated withdrawal of the dilator and insertion of the catheter, even if the puncture point is pressed, especially the artery, the high arterial pressure and the increased diameter of the arterial puncture point after dilation can easily cause massive bleeding at the arterial puncture point, thereby aggravating the patient's condition.

[0012] Therefore, this application aims to solve the problem of long removal time of the dilator from the guidewire and reduce the amount of bleeding in the patient's blood vessels after dilation. Utility Model Content

[0013] The main purpose of this invention is to provide a vascular puncture dilator for ECMO, which aims to reduce the time it takes to remove the dilator from the guidewire and reduce the amount of bleeding in the patient's blood vessels after dilation.

[0014] To achieve the above objectives, this utility model proposes a vascular puncture dilator for ECMO, comprising:

[0015] The expansion member is a hollow cylinder with an opening along its length; and

[0016] An adjusting element is provided on the inner wall of the expansion element, and its length direction is provided with an opening line for placing the guide wire.

[0017] The adjusting member is rotatable relative to the axis of the expanding member, and the second opening line is optionally aligned with the first opening line, so as to disengage the guide wire from the second opening line and the first opening line.

[0018] Furthermore, one of the opening lines is provided with a sloping portion, which partially obscures the second opening line.

[0019] Furthermore, the inclined portion at least partially covers the opening line.

[0020] Furthermore, the inclined portion is arc-shaped on the side facing the second opening line.

[0021] Furthermore, the adjusting member is a cylinder that rotates on the inner wall of the expansion member.

[0022] Furthermore, the end of the adjustment member furthest from the puncture also extends a grip.

[0023] Furthermore, it also includes a positioning mechanism for restricting the rotation of the expansion member and the adjustment member.

[0024] Furthermore, the positioning mechanism includes a locking block installed on the adjusting member away from the puncture end, and the outer wall of the expansion member is provided with a locking groove that cooperates with the locking block.

[0025] Furthermore, the positioning mechanism includes a retaining ring disposed at one end of the adjusting member, the retaining ring being dampedly connected to the expanding member.

[0026] The above technical solution has the following advantages:

[0027] This invention features a dilator and an adjuster that work together, with an opening line 1 and an opening line 2 respectively on the dilator and the adjuster. The guidewire can move from opening line 1 to opening line 2. After the adjuster and dilator are rotated, the guidewire can be restricted from moving out of opening line 2, allowing for vascular dilation. When opening line 2 coincides with opening line 1, the dilator is removed from the puncture site and can be directly removed from the guidewire, avoiding the need for the dilator to be withdrawn through the guidewire, reducing the time required to remove the dilator from the guidewire, and reducing the amount of bleeding from the patient's blood vessels after dilation. Attached Figure Description

[0028] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings, wherein:

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0031] Figure 3 This is a schematic diagram of the adjusted structure of this utility model;

[0032] Figure 4 This is a schematic diagram of the structure of the expansion component of this utility model;

[0033] Figure 5 This is a schematic diagram of the structure of the adjusting component of this utility model.

[0034] In the diagram: 1. Expansion part; 11. Opening line one; 12. Slot; 13. Inclined part; 2. Adjustment part; 21. Grip part; 22. Opening line two; 3. Guide wire; 23. Locking block; 24. Locking ring. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain this utility model and do not constitute a limitation on this utility model.

[0036] like Figures 1 to 3As shown, an ECMO vascular puncture dilator includes a dilator 1 and an adjusting member 2. The dilator 1 is a hollow cylinder with an opening line 11 along its length. The adjusting member 2 is disposed on the inner wall of the dilator 1 and has an opening line 22 along its length for placing a guide wire 3. The adjusting member 2 can rotate relative to the axis of the dilator 1 and selectively overlap the opening line 22 with the opening line 11 to disengage the guide wire 3 from the opening line 22 and the opening line 11.

[0037] Specifically, the opening line 11 is set as a long strip on the side wall of the hollow cylinder, parallel to the axis of the hollow cylinder, or at a slight angle to the axis of the hollow cylinder. The specific design can be selected according to the design requirements. In this application, the long strip opening line 11 parallel to the axis of the hollow cylinder is preferred. This makes it convenient for the doctor to easily move the straightened guidewire 3 from the opening line 11 to the opening line 22 when pulling one end of the guidewire 3. The opening line 22 is a long strip, and its shape can be similar to that of the opening line 11. When the adjusting member 2 rotates relative to the dilator 1, the opening line 11 and the opening line 22 are misaligned, so as to restrict the guidewire 3 from moving out through the side wall of the dilator 1 and the opening line 22. At this time, the blood vessel can be dilated by the dilator 1.

[0038] When the adjusting member 2 rotates relative to the dilator 1, causing the second opening line 22 to coincide with the first opening line 11, the dilator 1 and the adjusting member 2 can be directly removed from the guidewire 3, thus detaching the dilator 1 and the adjusting member 2 from the guidewire 3. This process only requires removing the dilator 1 out of the blood vessel. When replacing it, the second opening line 22 and the first opening line 11 only need to coincide and be secured on the guidewire 3. Then, the adjusting member 2 is rotated to misalign the first opening line 11 with the second opening line 22, and the guidewire 3 is moved radially along the dilator 1. There is no need to remove the dilator 1 and the adjusting member 2 from the end of the guidewire 3 before inserting a larger dilator 1, which saves replacement efficiency and reduces the problems that may occur after the blood vessel is dilated.

[0039] like Figure 2 and Figure 4 As shown, an inclined portion 13 is provided at the opening line 11, which partially blocks the opening line 22. The inclined portion 13 is integrally formed with the dilator 1. It is used to block part of the opening line 22. If the width of the opening line 11 is too large, it will affect the dilation of the blood vessel. At the same time, it can also restrict the guide wire 3 of the opening line 22, preventing the guide wire 3 from falling out of the opening line 11. This makes it easier for the adjusting member 2 to rotate the guide wire 3 between the opening line 22 and the inner wall of the dilator 1 when rotating.

[0040] like Figure 3 and Figure 4As shown, in one embodiment of this application, the inclined portion 13 at least covers a portion of the opening line 11. The inclined portion 13 can be provided in part of the opening line 11 or can completely cover the entire length of the opening line 11. Different inclined portions 13 can be designed according to specific needs and material requirements. For example, the inclined portion 13 can be provided at the beginning and end of the opening line 11, or several portions can be provided on the opening line 11.

[0041] like Figure 2 and Figure 4 As shown, the inclined portion 13 is arc-shaped on the side facing the second opening line 22. The arc-shaped part of the inclined portion 13 is used to guide the guide wire 3. When the guide wire 3 needs to be moved out from the second opening line 22 and the first opening line 11, the arc shape can facilitate the removal of the guide wire 3, so as to avoid the guide wire 3 being affected by the inclined portion 13 and difficult to remove. It should be noted that the arc shape is only one method, and the inclined surface can also be used instead of the arc shape.

[0042] like Figure 2 and Figure 3 As shown, the adjusting member 2 is a cylinder that rotates on the inner wall of the expanding member 1. The adjusting member 2 can be a hollow cylinder or a solid cylinder. The opening line 22 is also symmetrically arranged about the plane containing the axis of the expanding member 1 to ensure smooth rotation of the adjusting member 2 and the expanding member 1.

[0043] like Figure 3 As shown, the end of the adjusting member 2 away from the puncture also extends a grip 21, wherein the grip 21 is integrally formed with the adjusting member 2. The grip 21 is convenient for medical staff to grasp and rotate, so as to drive the adjusting member 2 to rotate relative to the expansion member 1, thereby adjusting the position of the guide wire 3 and the opening line 11. The grip 21 may also be provided with some anti-slip holes or anti-slip protrusions.

[0044] like Figure 1 , Figure 2 and Figure 5 As shown, it also includes a positioning mechanism, which is used to restrict the rotation of the expansion member 1 and the adjustment member 2. When the adjustment member 2 rotates relative to the expansion member 1, the positioning mechanism restricts the movement of the two to facilitate puncture treatment.

[0045] As one embodiment of this application, the positioning mechanism includes a locking block 23 installed on the adjusting member 2 away from the puncture end. The outer wall of the expansion member 1 is provided with a slot 12 that cooperates with the locking block 23. When the adjusting member 2 and the expansion member 1 are installed, the adjusting member 2 rotates relative to the expansion member 1, and the locking block 23 gradually engages in the slot 12, thereby restricting the rotation of the expansion member 1 and the adjusting member 2.

[0046] As one embodiment of this application, the positioning mechanism includes a retaining ring 24 disposed at one end of the adjusting member 2. The retaining ring 24 is dampedly connected to the expansion member 1, and the rotational force of the adjusting member 2 and the expansion member 1 is increased by the damping of the adjusting member 2 and the expansion member 1.

[0047] Usage steps:

[0048] ①This expander has two layers, inner and outer, consisting of an expanding component 1 and an adjusting component 2;

[0049] ② The adjusting component 2 is set to be the same length as the expanding component 1, with a full-length opening and a width slightly larger than the opening line of the guide wire 3;

[0050] ③ During puncture and dilation, the opening line 11 and the opening line 22 are not the same and are in a locked state. In this way, the guide wire 3 will not come out from the opening line of the dilator 1 and the adjusting member 2.

[0051] ④ Do not remove the expander yet. Then insert the larger expander along guide wire 3 into the end of the previous expander to prepare for the second expansion.

[0052] ⑤ After the first expansion is completed, rotate the expanded expansion piece 1 and the adjusting piece 2 to align the opening line 11 with the opening line 22. In this way, there is an opening along the entire length of the inner and outer layers of the expander. Pull the guide wire 3 out from this opening of the expansion piece 1 and the adjusting piece 2, and take out the expander smoothly. Then, insert the large expander in the compressed state.

[0053] ⑥ Repeat this skin dilation process until the desired effect is achieved. After the last skin dilation, do not remove the dilator. Instead, guide the arteriovenous catheter along guidewire 3 to the end of the dilator.

[0054] ⑦ After the skin dilation is completed, rotate the dilator 1 and the adjustment part 2 of the last dilator to align the opening line 11 with the opening line 22. The guide wire 3 can then be removed from this opening line, and the dilator can be taken out smoothly. Then, the arterial and venous catheters are inserted. This avoids the process of repeatedly and slowly withdrawing the dilator along the guide wire 3 and then inserting the arterial and venous catheters along the guide wire 3, thus reducing a lot of bleeding.

[0055] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A blood vessel puncture dilator for ECMO, characterized by, The utility model relates to a kind of catheter, including: Expansion piece (1), hollow cylinder is presented, and the length direction has opening line one (11); And Adjusting piece (2) is arranged in the inner wall of the expansion piece (1), and the length direction is provided with the opening line two (22) of the guide wire (3) placement; Wherein, the adjusting piece (2) can rotate relative to the axis of the expansion piece (1), and make the opening line two (22) and the opening line one (11) can be selected to coincide, to separate guide wire (3) from the opening line two (22) and the opening line one (11).

2. The vascular puncture dilator for ECMO according to claim 1, wherein, The opening line one (11) is provided with inclined portion (13), and the inclined portion (13) partially shields the opening line two (22).

3. The vascular puncture dilator for ECMO as claimed in claim 2, characterized in that, The inclined portion (13) covers at least part of the opening line one (11).

4. The vascular puncture dilator for ECMO according to claim 2 or 3, characterized in that, The inclined portion (13) is arc-shaped towards the side of the opening line two (22).

5. The vascular puncture dilator for ECMO of claim 1, wherein, The adjusting piece (2) is a cylinder rotating in the inner wall of the expansion piece (1).

6. The vascular puncture dilator for ECMO of claim 1, wherein, The end of the adjusting piece (2) away from puncture also extends with grip (21).

7. The vascular puncture dilator for ECMO of claim 1, wherein, Further comprising positioning mechanism, the positioning mechanism is used to limit the rotation of the expansion piece (1) and the adjusting piece (2).

8. The vascular puncture dilator for ECMO of claim 7, wherein, The positioning mechanism includes clamping block (23) installed in the end of the adjusting piece (2) away from puncture, and the outer wall of the expansion piece (1) is provided with clamping groove (12) matched with the clamping block (23).

9. The vascular puncture dilator for ECMO of claim 7, wherein, The positioning mechanism includes snap ring (24) arranged in one end of the adjusting piece (2), and the snap ring (24) is connected with the expansion piece (1) damping.

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