Double-cavity adjustable blood vessel sheath

Abstract

The invention discloses a double-cavity type adjustable blood vessel sheath which comprises a tube seat, a fixing cylinder is fixedly connected to the bottom of the tube seat, a sheath tube shell is fixedly arranged at the bottom of the fixing cylinder, a partition guide-in piece is arranged in the tube seat, and the partition guide-in piece can guide double guide wires to enable the double guide wires to enter correct cavity tubes; the sheath tube shell is internally provided with a double-cavity part which penetrates through the fixing cylinder and extends into the tube base, and double guide wires can be separately introduced into the double-cavity part and do not interfere with each other. By arranging the double-cavity part, the double-cavity part is composed of the inner pipe fitting and the outer pipe fitting, the inner pipe fitting and the outer pipe fitting form the area cavities which are separated from each other, two guide wires can independently pass through the area cavities at the same time, by means of the design, a doctor can operate more flexibly in the operation process, the guide wires and the sheathing canal do not need to be replaced repeatedly when a blood vessel stenosis dilation operation is conducted, and the operation efficiency is improved. The convenience and the flexibility of the operation are greatly improved, and a more effective means is provided for the treatment of complex vascular diseases.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a double-chamber adjustable vascular sheath. Background Art

[0002] Minimally invasive interventional therapy is a minimally invasive technique that, under the guidance of medical imaging equipment, inserts instruments or drugs into diseased tissues with the least trauma for physical, mechanical, or chemical treatment. Interventional therapy requires establishing a channel from outside the body into the blood vessel. A vascular sheath is used to puncture and insert into the blood vessel percutaneously, and instruments or drugs are delivered to the diseased site through the vascular sheath for treatment.

[0003] For current vascular sheaths, such as a safety type vascular puncture sheath disclosed in Chinese Patent Publication No. "CN111084654B", when it is necessary to change from a small-diameter sheath to a large-diameter sheath during the operation, a new vascular sheath needs to be replaced additionally to continue the operation. And normally, when changing from a small-diameter sheath to a large-diameter sheath, a medium-diameter sheath is required for transition, which is very inconvenient to use. Accordingly, the present invention proposes a double-chamber adjustable vascular sheath. Summary of the Invention

[0004] The purpose of the present invention is to solve the drawbacks existing in the prior art, and to propose a double-chamber adjustable vascular sheath.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A double-chamber adjustable vascular sheath includes a tube seat, the bottom of the tube seat is fixedly connected with a fixed cylinder, and the bottom of the fixed cylinder is fixedly provided with a sheath tube shell;

[0007] A partition introduction member is arranged inside the tube seat, and the partition introduction member can guide double guide wires to enter the correct cavity tubes;

[0008] A double-chamber part passing through the fixed cylinder and extending into the inside of the tube seat is arranged inside the sheath tube shell, and the double guide wires can be separately introduced into the double-chamber part without interference;

[0009] A pneumatic part is arranged inside the fixed cylinder, and the pneumatic part can expand the outer cavity of the double-chamber part to a certain extent by compressing air, that is, the diameter of the sheath can be expanded and changed.

[0010] Preferably, a hemostatic valve is fixedly provided at the top of the tube seat, and a drainage sleeve is fixedly provided at a part of the tube seat.

[0011] Preferably, the sheath tube shell is coated with a hydrophilic coating, making the transportation process more persistent, stable and smooth.

[0012] Preferably, the partitioned introduction member is in communication with the fixed cylinder and the double-chamber part, and is coaxially arranged with the sheath tube housing.

[0013] Preferably, the double-chamber part is composed of an inner pipe fitting and an outer pipe fitting. The inner pipe fitting and the outer pipe fitting are separated regional cavities, facilitating the passage of two guide wires.

[0014] Preferably, the pneumatic part is arranged at the top of the outer pipe fitting, and the pneumatic part is in communication with the expansion part in the outer pipe fitting for ventilation.

[0015] Preferably, the pneumatic part is composed of a ventilation part and an air outlet part. The gas pressed into by the ventilation part fills the outer pipe fitting through a path and then returns to the air outlet part after filling the components of the outer pipe fitting.

[0016] Preferably, the ventilation part is fixedly arranged on one side of the fixed cylinder, and its output end passes through the fixed cylinder and is connected to the outer pipe fitting in communication. The air outlet part is fixedly arranged on the side of the fixed cylinder away from the ventilation part, and its input end passes through the fixed cylinder and is connected to the outer appearance part in communication.

[0017] Preferably, the partitioned introduction member is in communication with the double-chamber part through the pipe seat via the pneumatic part.

[0018] The present invention has the following beneficial effects:

[0019] 1. By providing the partitioned introduction member, the double guide wires can be accurately guided to enter the correct lumen. In complex vascular intervention surgeries, multiple guide wires are often required simultaneously to achieve different operation purposes. For example, one guide wire is used for positioning and the other for delivering treatment devices. The partitioned introduction member can effectively prevent the guide wires from winding and crossing inside the sheath tube, preventing situations such as guide wire jamming and blood vessel damage during the surgery, thus significantly improving the safety and operation efficiency of the surgery, reducing the operation time and the patient's risk.

[0020] 2. By providing the double-chamber part, which is composed of an inner pipe fitting and an outer pipe fitting, forming separated regional cavities, two guide wires can pass through simultaneously and independently. This design enables doctors to operate more flexibly during the surgery. When performing vascular stenosis dilation surgery, there is no need to repeatedly replace the guide wires and the sheath tube, greatly improving the convenience and flexibility of the surgery and providing a more effective means for the treatment of complex vascular diseases.

[0021] 3. By setting up the pneumatic part, the outer cavity of the double-chamber part can be expanded to a certain extent by compressing air, realizing the change of the sheath diameter. During clinical operations, the vascular conditions of different patients and the sizes of the instruments required for the operations vary. The pneumatic part can flexibly adjust the sheath diameter according to the actual surgical needs, which can not only ensure the smooth passage of thinner instruments and reduce the damage to blood vessels, but also provide sufficient space by expanding the sheath when larger-sized instruments are needed, without the need to replace vascular sheaths of different specifications, reducing the surgical cost and operation complexity, and improving the success rate of the operation and the comfort of the patient.

[0022] 4. The hydrophilic coating applied on the sheath shell can significantly reduce the frictional resistance between the sheath and the blood vessel wall, making the vascular sheath smoother and more stable during transportation. At the same time, the partitioned introducer, the fixing cylinder, the double-chamber part and the sheath shell are coaxially arranged, and all components are interconnected, ensuring the smooth transportation path of the guide wire and the instrument in the sheath, reducing the transportation jamming problem caused by unreasonable structure, and further improving the stability and reliability of the surgical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the front view structural schematic diagram of a double-chamber adjustable vascular sheath proposed by the present invention;

[0024] Figure 2 is the structural schematic diagram of the sheath part of a double-chamber adjustable vascular sheath proposed by the present invention;

[0025] Figure 3 is the structural schematic diagram inside the sheath shell of the present invention;

[0026] Figure 4 is the structural schematic diagram inside the fixing cylinder of the present invention;

[0027] Figure 5 is the structural schematic diagram of the partitioned introducer of the present invention;

[0028] Figure 6 is the structural schematic diagram inside the tube seat of the present invention;

[0029] Figure 7 is the structural schematic diagram of the pneumatic part of the present invention;

[0030] Figure 8 is Figure 3 the enlarged structural schematic diagram of A in

[0031] In the figure: 1 tube seat, 2 hemostatic valve, 3 drainage cannula, 4 fixing cylinder, 5 sheath shell, 6 cover plate, 7 inner sheath, 8 elastic membrane ring, 9 outer sheath sac tube, 10 inflation cavity, 11 dilation balloon, 12 air inlet pipe, 13 first one-way valve, 14 airbag, 15 air inlet, 16 exhaust pipe, 17 second one-way valve, 18 rotary air valve, 19 through hole. Detailed implementation mode

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0033] Refer to Figures 1 - 8 , a double-chamber adjustable vascular sheath, including a tube seat 1, a fixed cylinder 4 is fixedly connected to the bottom of the tube seat 1, and a sheath tube shell 5 is fixedly arranged at the bottom of the fixed cylinder 4;

[0034] A partition introduction member is arranged inside the tube seat 1, and the partition introduction member can guide the double guide wires so that they enter the correct cavity tubes.

[0035] A double-chamber part passing through the fixed cylinder 4 and extending into the inside of the tube seat 1 is arranged inside the sheath tube shell 5, and the double guide wires can be separately introduced into the double-chamber part without interference.

[0036] A pneumatic part is arranged inside the fixed cylinder 4, and the pneumatic part can expand the outer cavity of the double-chamber part to a certain extent by compressing air, that is, the diameter of the sheath can be expanded and changed.

[0037] Embodiment 1:

[0038] Refer to Figures 5 - 6 , a hemostatic valve 2 is fixedly arranged on the top of the tube seat 1, a drainage sleeve 3 is fixedly arranged on some parts of the tube seat 1, and a hydrophilic coating is applied on the sheath tube shell 5, making the conveying process more stable and smooth.

[0039] The partition introduction member is interconnected with the fixed cylinder 4 and the double-chamber part, and is arranged coaxially with the sheath tube shell 5.

[0040] In this embodiment, a cover plate 6 is fixedly arranged on the top of the tube seat 1, an inner pipe fitting is fixedly arranged on the cover plate 6, the inner pipe fitting is composed of an inner sheath tube 7, the inner sheath tube 7 passes through the fixed cylinder 4 and extends into the inside of the sheath tube shell 5, and four symmetrically arranged through holes 19 are opened on the cover plate 6 and around the inner sheath tube 7. In actual operation, when performing a double-guide wire intervention operation, the two guide wires are respectively sent in from the entrances of the inner sheath tube 7 and the through holes 19. Through the special channel structure inside the partition introduction member, the double guide wires can be accurately guided, so that they can smoothly enter the correct cavity tubes of the double-chamber part along the fixed cylinder 4 and the inner sheath tube 7. This design effectively avoids the entanglement and crossing of the guide wires inside the sheath tube, prevents the guide wires from getting stuck and damaging blood vessels during the operation, thereby significantly improving the safety and operation efficiency of the operation, reducing the operation time and the risk of patients, and achieving the beneficial effect of accurate guide wire guidance.

[0041] Embodiment 2:

[0042] Refer toFigure 3 , Figure 4 and Figure 8 , the double - chamber part is composed of an inner pipe fitting and an outer pipe fitting. The inner pipe fitting and the outer pipe fitting are mutually separated regional cavities, which is convenient for passing two guide wires.

[0043] In this embodiment, the outer pipe fitting is composed of an elastic membrane ring 8, an outer sheath tube 9 and an inflation cavity 10. A number of elastic membrane rings 8 are fixedly connected to the inner wall of the sheath tube shell 5. The elastic membrane ring 8 is an elastic thin - film structure, and a number of folding holes are opened thereon to facilitate the compression folding and recovery expansion of the elastic membrane ring 8. An outer sheath tube 9 fixedly connected to the elastic membrane ring 8 is sleeved outside the inner sheath tube 7. The outer sheath tube 9 is made of elastic memory rubber material, and a folding area with a wavy structure is provided on the outer sheath tube 9. The diameter expansion and retraction of the outer sheath tube 9 can be controlled through the folding area. An inflation cavity 10 is opened inside the outer sheath tube 9. By inflating the inflation cavity 10, the wavy folding structure on the outer sheath tube 9 can be expanded, so as to expand the diameter of the outer sheath tube 9.

[0044] Embodiment Three:

[0045] Refer to Figure 3 , Figure 4 , Figure 7 and Figure 8 , the air pressure part is arranged at the top of the outer pipe fitting. The air pressure part and the expansion part in the outer pipe fitting are mutually connected and ventilated. The air pressure part is composed of a ventilation part and an air outlet part. The gas filled by the ventilation part fills the outer pipe fitting through a path and then flows back to the air outlet part after filling the components of the outer pipe fitting.

[0046] The ventilation part is fixedly arranged on one side of the fixed cylinder 4, and its output end passes through the fixed cylinder 4 and is connected to the outer pipe fitting. The air outlet part is fixedly arranged on the side of the fixed cylinder 4 away from the ventilation part, and its input end passes through the fixed cylinder 4 and is connected to the outer appearance part.

[0047] The partition introduction part passes through the pipe seat 1 and is mutually connected with the double - chamber part through the pneumatic part.

[0048] In this embodiment, the ventilation part is composed of an expansion balloon 11, an air inlet pipe 12, a first one - way valve 13, an airbag 14 and an air inlet 15. The expansion balloon 11 is fixedly arranged on the top of the outer sheath tube 9 and is fixedly connected to the outer sheath tube 9. The inlet of the expansion balloon 11 is arranged outside the inner sheath tube 7 and does not contact the inner sheath tube 7. An air inlet pipe 12 connected to the expansion balloon 11 is fixedly connected to one side of the fixed cylinder 4. A first one - way valve 13 is arranged on the air inlet pipe 12, and the first one - way valve 13 is unidirectionally oriented towards the expansion balloon 11. An airbag 14 is fixedly connected to one side of the air inlet pipe 12, and an air inlet 15 is arranged on one side of the airbag 14.

[0049] In addition, the air outlet component is composed of an exhaust pipe 16, a second one-way valve 17 and a rotary air valve 18. The exhaust pipe 16 is fixedly arranged on the other side of the fixed cylinder 4, and the exhaust pipe 16 is communicated with the expansion balloon 11. A second one-way valve 17 is arranged on the exhaust pipe 16, and a rotary air valve 18 is arranged on one side of the exhaust pipe 16. The second one-way valve 17 faces the rotary air valve 18 unidirectionally.

[0050] Furthermore, when the diameter of the sheath tube needs to be enlarged during the operation, the balloon 14 is pinched to press the gas into the expansion balloon 11 through the air inlet pipe 12. While the expansion balloon 11 expands, it guides the gas to be filled downward into the inflation cavity 10. At this time, the outer sheath tube 9 is gradually expanded synchronously to expand the outer cavity to a certain extent, so as to realize the expansion and change of the diameter of the sheath.

[0051] Furthermore, when the diameter of the sheath tube needs to be restored during the operation, the rotary air valve 18 is rotated to open. At this time, the air inside the expansion balloon 11 and the outer sheath tube 9 is discharged to the outside from the exhaust pipe 16 by the elastic resilience. At this time, the expansion balloon 11 and the outer sheath tube 9 return to their original states. During the clinical operation, according to the vascular conditions of different patients and the sizes of the instruments required for the operation, the doctor can flexibly control the amount of gas pressed into by the ventilation component and adjust the diameter of the sheath tube, which can not only meet the smooth passage of thinner instruments and reduce the damage to blood vessels, but also provide enough space by expanding the sheath tube when larger-sized instruments are needed, without the need to replace vascular sheaths of different specifications, reducing the operation cost and operation complexity, improving the success rate of the operation and the comfort of the patient, and achieving the beneficial effect of adapting to diverse operation requirements.

[0052] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A double-chamber adjustable vascular sheath, comprising a hub (1), characterized in that, The bottom of the socket (1) is fixedly connected to a fixed cylinder (4), and the bottom of the fixed cylinder (4) is fixedly provided with a sheath tube shell (5); A partitioned inlet member is provided inside the socket (1), and the partitioned inlet member can guide the double guide wires to enter the correct cavity tube; A double cavity part passing through the fixed cylinder (4) and extending into the socket (1) is provided inside the sheath tube shell (5), and the double guide wires can be separately introduced into the double cavity part without interference; A pneumatic part is provided inside the fixed cylinder (4), and the pneumatic part can expand the outer cavity of the double cavity part to a certain extent by compressing air, that is, the diameter of the sheath can be changed by expansion; 2. The double-chamber adjustable vascular sheath according to claim 1, characterized in that, A hemostatic valve (2) is fixedly provided at the top of the socket (1), and a drainage cannula (3) is fixedly provided at some positions of the socket (1).

3. The double-chamber adjustable vascular sheath according to claim 1, wherein, The sheath tube shell (5) is coated with a hydrophilic coating, making the conveying process more durable, stable and smooth; 4. A double-chamber adjustable vascular sheath according to claim 1, wherein, The partitioned inlet member is interconnected with the fixed cylinder (4) and the double cavity part, and is coaxially arranged with the sheath tube shell (5); 5. A double-chamber adjustable vascular sheath according to claim 1, characterized in that, The double cavity part is composed of an inner pipe part and an outer pipe part, and the inner pipe part and the outer pipe part are separated regional cavities to facilitate the passage of two guide wires; 6. The double-chamber adjustable vascular sheath according to claim 5, characterized in that, The pneumatic part is arranged at the top of the outer pipe part, and the pneumatic part is interconnected and ventilated with the expansion part in the outer pipe part; 7. The double-chamber adjustable vascular sheath according to claim 1, characterized in that The pneumatic part is composed of a ventilation part and an air outlet part, and the gas pressed into by the ventilation part fills the outer pipe part through a filling path and then flows back to the air outlet part after filling the outer pipe part components; 8. A double-chamber adjustable vascular sheath according to claim 7, characterized in that, The ventilation part is fixedly arranged on one side of the fixed cylinder (4), and the output end passes through the fixed cylinder (4) and is connected to the outer pipe part, and the air outlet part is fixedly arranged on the side of the fixed cylinder (4) away from the ventilation part, and the input end passes through the fixed cylinder (4) and is connected to the outer appearance part; 9. A double-chamber adjustable vascular sheath according to claim 1, wherein, The partitioned inlet member is interconnected with the double cavity part through the pneumatic part through the socket (1);

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