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 invention relates to an interventional ultrasonic catheter with a variable sheath, belonging to the technical field of medical devices. Background Art

[0002] An interventional ultrasound catheter is an intravascular ultrasound imaging device, and a sheath is a device that establishes a channel from the skin to the blood vessel cavity to facilitate repeated delivery or exchange of instruments into the blood vessel. Existing sheaths include ordinary sheaths, anti-bending sheaths, stent delivery sheaths, and guide catheters, which are used in different scenarios.

[0003] However, with the continuous development of the purpose of use, the existing sheaths also have certain limitations. For example, when collecting intravascular ultrasound images, when the movement of the sheath is restricted, the acquired images may not fully and accurately reflect the condition of the blood vessels; and the above-mentioned restricted movement may also damage the blood vessel wall. Therefore, an interventional ultrasound catheter with a wider range of movement is needed. Summary of the invention

[0004] Therefore, an object 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 object, the present invention provides an interventional ultrasound catheter with a variable sheath, comprising:

[0006] The handle part includes a rotating wheel and a three-way pipe, wherein a rotating mandrel is sleeved on the inner side of the three-way pipe, and the rotating wheel is threadedly connected to the rotating mandrel at one end of the three-way pipe; the other end of the three-way pipe is connected to a wire pulling block through a connecting piece, and a wire pulling screw is fixed on the periphery of the wire pulling block;

[0007] The sheath part includes a first multi-lumen tube, a second multi-lumen tube and a corrugated tube connected to the first multi-lumen tube by heat shrinkage, wherein the first multi-lumen tube is connected to the wire pull block at one end away from the corrugated tube, and the second multi-lumen tube is connected to a tip at one end away from the corrugated tube; a first sleeve is provided inside the side of the corrugated tube close to the first multi-lumen tube, a plug is provided inside the side of the corrugated tube close to the second multi-lumen tube, and a guide tube is fixedly connected to the plug; 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 cavity tube; 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 shaft, and the connecting rod is fixedly connected to the plug via the pin shaft; 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 respectively connected to the three-way pipe and the wire block 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 fit 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 to the gap between the plug and the second multi-lumen tube.

[0016] By adopting the above technical scheme, the present invention 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 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, 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 A schematic diagram of an interventional ultrasound catheter with a variable sheath provided by the present invention;

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

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

[0022] Figure 6A schematic diagram of a variable sheath provided by the present invention after being bent in an interventional ultrasound catheter;

[0023] Figure 7 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 present invention.

[0024] In the figure: 1. handle portion; 2. rotating wheel; 3. three-way pipe; 4. rotating mandrel; 5. wire pulling block; 6. sheath portion; 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. wire pulling; 18. pin; 19. transducer; 20. second sleeve; 21. connecting piece; 22. wire pulling screw. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below through the accompanying drawings and specific embodiments. Usually, an interventional ultrasound catheter and a sheath are used in conjunction with each other. The former is an intravascular ultrasound imaging device, while the latter refers to establishing a channel from the skin to the blood vessel cavity. When the movement of the sheath is restricted, the acquired image may not fully and accurately reflect the condition of the blood vessel; and the above-mentioned restricted movement may also cause damage to the blood vessel wall. Therefore, an interventional ultrasound catheter that can increase the range of movement is needed.

[0026] Example

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

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

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

[0030] The sheath tube part 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 wire drawing 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 bonding by glue; a first sleeve 11 is provided inside the side of the bellows 9 close to the first multi-lumen tube 7, and a plug 12 is provided inside the side of the bellows 9 close to 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 second sleeve 20 is provided inside the side of the bellows 9 close to the second multi-lumen tube 8, and 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] 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 a 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 steel wire rope 15 can be connected to the rotating core shaft 4 and the plug 12 by welding; the pull wire 17 is fixed to 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 fixing strength, 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 through the pin 18; it is used to drive the connecting rod 14 to produce relative movement when the plug 12 is subjected to force.

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

[0034] In the specific use process, the wire 17 is tightened by the wire screw 22, so that the plug 12 connected to the wire 17 is stressed, which in turn causes the guide tube 13 to drive the connecting rod 14 to deform, so that the second multi-lumen tube 8 is deformed, and this deformation may be rising or falling. In addition, since the wire 17 is placed inside the sheath tube 6 and fixed by the corresponding pin 18 of the guide tube 13, the movement of the wire rope 15 is avoided.

[0035] The present invention provides an interventional ultrasonic catheter with a variable sheath, which is configured 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, causing the interventional ultrasonic catheter to deform in the direction in which the blood vessel extends, thereby increasing the range of motion of the interventional ultrasonic catheter.

[0036] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the 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 mandrel (4) is sleeved on the inner side of the three-way pipe (3), and the rotating wheel (2) is threadedly connected to the rotating mandrel (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 tube 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 wire drawing 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) close to the first multi-lumen tube (7), and a plug (12) is provided inside the side of the bellows (9) close to 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 (6), and is fixedly connected to the base (16) inside the second cavity tube; 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 variable sheath interventional ultrasound catheter 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 (18) 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 as claimed in claim 1, characterized in that: The connecting piece (21) is respectively connected to the three-way pipe (3) and the wire pulling block (5) by heat shrinking.

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

7. The variable sheath interventional ultrasound catheter 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 shrinking.

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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