Interventional ultrasonic catheter with variable sheathing canal

Abstract

The interventional ultrasonic catheter comprises a handle part, the handle part comprises a rotating wheel and a three-way pipe, the three-way pipe is connected with a rotating mandrel in a sleeving mode, and the rotating wheel is connected with the rotating mandrel; the three-way pipe is connected with a stay wire block, and the stay wire block fixes a stay wire screw; the sheath tube part comprises a first multi-cavity tube, a second multi-cavity tube and a corrugated tube, the first multi-cavity tube is connected with the stay wire block, and the second multi-cavity tube is connected with the tip; the corrugated pipe is provided with a first sleeve and a plug; the plug is connected with the guide pipe; the first sleeve and the guide pipe are connected with connecting rods; the steel wire rope is connected with the rotating mandrel, penetrates through the sheath tube part and is connected with the base; the steel wire rope is provided with a stay wire, a stay wire connecting plug and a stay wire screw. According to the scheme, the sheath tube part is arranged to be of a segmented structure of the first cavity tube, the second cavity tube and the corrugated tube, and the corrugated tube is arranged to be in the form that the connecting rod is connected with the guide tube and the stay wire block; when the plug is driven by the pull wire to be stressed, the plug deforms, so that the interventional ultrasonic catheter deforms in the extending direction of a blood vessel, and the movement range of the interventional ultrasonic catheter is widened.

Description

Technical Field

[0001] The utility model relates to an interventional ultrasonic catheter with a variable sheath, belonging to the technical field of medical equipment. Background Art

[0002] An interventional ultrasound catheter is an intravascular ultrasound imaging device, while a sheath creates a channel from the skin to the vascular lumen, facilitating repeated insertion and exchange of instruments. Existing sheaths include standard sheaths, anti-kink sheaths, stent delivery sheaths, and guide catheters, designed for different use cases.

[0003] However, as the purpose of use continues to evolve, existing sheaths have become increasingly limited. For example, when acquiring intravascular ultrasound images, restricted sheath movement can prevent the captured images from fully and accurately reflecting the vascular condition. Furthermore, this restricted movement can damage the vessel wall. Therefore, an interventional ultrasound catheter with a greater range of motion is needed. Utility Model Content

[0004] Therefore, the purpose of the present invention is to provide an interventional ultrasound catheter with a variable sheath, so as to reduce the restriction of the blood vessel wall on the movement and functional use of the interventional ultrasound catheter.

[0005] In order to achieve the above-mentioned object, the utility model provides an interventional ultrasound catheter with a variable sheath, comprising:

[0006] The handle portion includes a rotating wheel and a tee tube. A rotating core shaft is sleeved on the inner side of the tee tube. The rotating wheel is threadedly connected to the rotating core shaft at one end of the tee tube. The other end of the tee tube is connected to the wire pulling block through a connector. A wire pulling screw is fixed around the circumference of the wire pulling block.

[0007] The sheath portion includes a first multi-lumen tube, a second multi-lumen tube, and a bellows connecting the two by heat shrinkage, wherein the end of the first multi-lumen tube away from the bellows is connected to the pull wire block, and the end of the second multi-lumen tube away from the bellows is connected to a tip; a first sleeve is provided inside the side of the bellows near the first multi-lumen tube, and a plug is provided inside the side of the bellows near the second multi-lumen tube, and the plug is fixedly connected to a guide tube; at least two connecting rods are connected between the first sleeve and the guide tube;

[0008] A steel wire rope has one end fixedly connected to the rotating core shaft, passes through the sheath tube, and is fixedly connected to the base inside the second lumen; a pull wire is provided inside the steel wire rope, one end of the pull wire is connected to the plug, and the other end of the pull wire is connected to the pull wire screw.

[0009] Furthermore, the plug is provided with a pin, and the connecting rod is fixedly connected to the plug via the pin; and is used to drive the connecting rod to generate relative movement when the plug is subjected to force.

[0010] Furthermore, the connecting piece is connected to the three-way pipe and the wire block respectively by heat shrinkage.

[0011] Furthermore, a transducer is included, and the transducer is fixedly connected to the base.

[0012] Furthermore, the other end of the pull wire is tied to the pull wire screw.

[0013] Furthermore, a second sleeve is provided inside the side of the corrugated tube close to the second multi-lumen tube, and the second sleeve is interference-fitted with the guide tube.

[0014] Furthermore, the second multi-lumen tube, the second sleeve and the guide tube are fixed and bonded by heat shrinkage.

[0015] Furthermore, the pull wire is fixed in the gap between the plug and the second multi-lumen tube.

[0016] By adopting the above technical solution, the utility model provides an interventional ultrasonic catheter with a variable sheath, which is configured by configuring the sheath portion into a segmented connection structure of a first lumen, a second lumen and a bellows, and configuring the two ends of the bellows into a structural form of a connecting rod connecting a guide tube and a pull wire block; thereby, the plug connected to the guide tube is deformed when driven by the pull wire and subjected to force, causing the interventional ultrasonic catheter to deform in the direction of extension of the blood vessel, thereby improving the range of motion of the interventional ultrasonic catheter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of an interventional ultrasound catheter with a variable sheath provided by the utility model;

[0018] Figure 2 This is a schematic diagram of the connection between the handle and the connector in an interventional ultrasound catheter with a variable sheath provided by the present invention;

[0019] Figure 3 A schematic diagram of a sheath portion of an interventional ultrasound catheter with a variable sheath provided by the present invention;

[0020] Figure 4 This is a schematic diagram of a plug and a transducer in an interventional ultrasound catheter with a variable sheath provided by the utility model;

[0021] Figure 5 This is a schematic diagram of a pull wire in an interventional ultrasound catheter with a variable sheath provided by the present invention;

[0022] Figure 6This is a schematic diagram of a variable sheath provided by the utility model after being bent in an interventional ultrasound catheter;

[0023] Figure 7 This is a schematic diagram of a pull wire and a guide tube after bending in an interventional ultrasound catheter with a variable sheath provided by the utility model.

[0024] In the figure: 1. handle; 2. rotating wheel; 3. tee; 4. rotating core shaft; 5. pull wire block; 6. sheath; 7. first multi-lumen tube; 8. second multi-lumen tube; 9. bellows; 10. tip; 11. first sleeve; 12. plug; 13. guide tube; 14. connecting rod; 15. wire rope; 16. base; 17. pull wire; 18. pin; 19. transducer; 20. second sleeve; 21. connector; 22. pull wire screw. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below through accompanying drawings and specific embodiments. Typically, an interventional ultrasound catheter is used in conjunction with a sheath. The former is an intravascular ultrasound imaging device, while the latter establishes a channel from the skin to the blood vessel lumen. When the sheath is restricted in its movement, the acquired image may not fully and accurately reflect the vascular condition. Furthermore, this restricted movement may also damage the vessel wall. Therefore, an interventional ultrasound catheter with a greater range of movement is needed.

[0026] Example

[0027] like Figures 1 to 7 As shown, the utility model provides an interventional ultrasound catheter with a variable sheath, comprising:

[0028] The handle portion 1 includes a rotating wheel 2 and a tee pipe 3. A rotating mandrel 4 is sleeved on the inner side of the tee pipe 3. The rotating wheel 2 is threadedly connected to the rotating mandrel 4 at one end of the tee pipe 3. The other end of the tee pipe 3 is connected to the pull wire block 5 via a connector 21. In an optional embodiment, the connector 21 is connected to the tee pipe 3 and the pull wire block 5 respectively by heat shrinkage.

[0029] The wire pulling block 5 is fixed with a wire pulling screw 22 on its periphery, and the fixing method is not limited to thread connection;

[0030] The sheath portion 6 includes a first multi-lumen tube 7, a second multi-lumen tube 8, and a bellows 9 connecting the two by heat shrinkage. The end of the first multi-lumen tube 7 away from the bellows 9 is connected to the pull wire block 5, and the connection method can be heat shrinkage. The end of the second multi-lumen tube 8 away from the bellows 9 is connected to a tip 10, and the connection method can be glued. A first sleeve 11 is provided inside the bellows 9 on the side near the first multi-lumen tube 7, and a plug 12 is provided inside the bellows 9 on the side near the second multi-lumen tube 8. The plug 12 is fixedly connected to a guide tube 13. At least two connecting rods 14 are connected between the first sleeve 11 and the guide tube 13. A second sleeve 20 is provided inside the bellows 9 on the side near the second multi-lumen tube 8. The second sleeve 20 is interference fit with the guide tube 13. The second multi-lumen tube 8, the second sleeve 20, and the guide tube 13 are fixedly bonded by heat shrinkage.

[0031] One end of the steel wire rope 15 is fixedly connected to the rotating core shaft 4, passes through the sheath portion 6, and is fixedly connected to the base 16 inside the second lumen; a pull wire 17 is provided inside the steel wire rope 15, and one end of the pull wire 17 is connected to the plug 12. In an optional embodiment, the connection method of the steel wire rope 15, the rotating core shaft 4 and the plug 12 can be welding; the above-mentioned pull wire 17 is fixed in the gap between the plug 12 and the second multi-lumen tube 8.

[0032] The other end of the pull wire 17 is connected to the pull wire screw 22. To ensure the strength of the fixation, the other end of the pull wire 17 can be tied to the pull wire screw 22. The plug 12 is provided with a pin 18, and the connecting rod 14 is fixedly connected to the plug 12 via the pin 18; it is used to drive the connecting rod 14 to generate relative movement when the plug 12 is subjected to force.

[0033] Furthermore, the interventional ultrasound catheter further includes a transducer 19 , which is fixedly connected to the base 16 .

[0034] During use, the pull wire 17 is tightened using the pull wire screw 22, thereby applying force to the plug 12 to which the pull wire 17 is connected. This in turn causes the guide tube 13 to cause the connecting rod 14 to deform, thereby causing the second multi-lumen tube 8 to deform, which may be an upward or downward deformation. In addition, because the pull wire 17 is placed within the sheath portion 6 and is fixed by the corresponding pin 18 of the guide tube 13, it avoids restricting the movement of the wire rope 15.

[0035] The utility model provides an interventional ultrasonic catheter with a variable sheath, which is constructed by configuring the sheath portion to be a segmented connection structure of a first lumen, a second lumen, and a bellows, and configuring the two ends of the bellows to be a connecting rod connecting a guide tube and a pull wire block; thereby, the plug connected to the guide tube is deformed when driven by a pull wire and subjected to force, causing the interventional ultrasonic catheter to deform in the direction of extension of the blood vessel, thereby improving the range of motion of the interventional ultrasonic catheter.

[0036] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An interventional ultrasound catheter with a variable sheath, characterized in that: include: The handle portion (1) comprises a rotating wheel (2) and a three-way pipe (3), wherein a rotating core shaft (4) is sleeved on the inner side of the three-way pipe (3), and the rotating wheel (2) is threadedly connected to the rotating core shaft (4) at one end of the three-way pipe (3); the other end of the three-way pipe (3) is connected to a wire pulling block (5) through a connecting piece (21), and a wire pulling screw (22) is fixed on the periphery of the wire pulling block (5); The sheath portion (6) comprises a first multi-lumen tube (7), a second multi-lumen tube (8) and a bellows (9) connecting the two by heat shrinkage, wherein the end of the first multi-lumen tube (7) away from the bellows (9) is connected to the pull wire block (5), and the end of the second multi-lumen tube (8) away from the bellows (9) is connected to a tip (10); a first sleeve (11) is provided inside the side of the bellows (9) near the first multi-lumen tube (7), and a plug (12) is provided inside the side of the bellows (9) near the second multi-lumen tube (8), and the plug (12) is fixedly connected to a guide tube (13); at least two connecting rods (14) are connected between the first sleeve (11) and the guide tube (13); A steel wire rope (15) has one end fixedly connected to the rotating core shaft (4), passes through the sheath tube portion (6), and is fixedly connected to the base (16) inside the second multi-lumen tube (8); a pull wire (17) is provided inside the steel wire rope (15), one end of the pull wire (17) is connected to the plug (12), and the other end of the pull wire (17) is connected to the pull wire screw (22).

2. The interventional ultrasound catheter with a variable sheath according to claim 1, characterized in that: The plug (12) is provided with a pin shaft (18), and the connecting rod (14) is fixedly connected to the plug (12) via the pin shaft (18); the pin shaft is used to drive the connecting rod (14) to generate relative movement when the plug (12) is subjected to force.

3. The interventional ultrasound catheter with a variable sheath according to claim 1, characterized in that: The connecting piece (21) is respectively connected to the three-way pipe (3) and the wire drawing block (5) by heat shrinkage.

4. The interventional ultrasound catheter with a variable sheath according to claim 1, characterized in that: It also includes a transducer (19), which is fixedly connected to the base (16).

5. The interventional ultrasound catheter with a variable sheath according to claim 1, characterized in that: The other end of the pull wire (17) is tied to the pull wire screw (22).

6. The interventional ultrasound catheter with a variable sheath according to claim 1, characterized in that: A second sleeve (20) is provided inside the corrugated tube (9) on a side close to the second multi-lumen tube (8), and the second sleeve (20) is interference-fitted with the guide tube (13).

7. The interventional ultrasound catheter with a variable sheath according to claim 6, characterized in that: The second multi-lumen tube (8), the second sleeve (20) and the guide tube (13) are fixed and bonded by heat shrinkage.

8. The interventional ultrasound catheter with a variable sheath according to claim 1, characterized in that: The pull wire (17) is fixed in the gap between the plug (12) and the second multi-lumen tube (8).

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