Vascular sheath for interventional therapy and interventional therapy system

Abstract

The utility model relates to the technical field of medical instruments, and discloses a vascular sheath for interventional therapy and an interventional therapy system. The vascular sheath comprises a sheath tube assembly and a side tube assembly. The sheathing canal assembly comprises a sheathing canal; the sheathing canal is provided with a first channel penetrating through the two ends of the sheathing canal in the length direction of the sheathing canal, and surgical instruments penetrate through the first channel; at least one receding structure is arranged on the inner wall of the sheathing canal, and when the surgical instrument is placed in the first channel, a second channel for blood flow or medicine to pass through is formed between the receding structure and the outer wall of the surgical instrument; the side tube assembly comprises a side tube and a pressure sensor, the side tube assembly is connected with the sheath tube assembly, and the side tube is communicated with the sheath tube; the pressure sensor is adapted to detect a real-time pressure of blood flow within the second channel. In the operation process, blood flow or medicine can pass through the sheath tube, blood vessel damage possibly caused by instrument replacement for pressure measurement in the operation can be avoided, the operation risk is reduced, real-time monitoring can be achieved, the measurement precision can be improved, and real data can be reflected.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly to a vascular sheath for interventional therapy and an interventional therapy system. Background Art

[0002] A transvascular surgery is a surgery performed through blood vessels, usually used for treating vascular diseases such as aneurysms and vascular stenosis, and can also be used for treating kidney diseases such as kidney stones and renal cysts.

[0003] During such a surgery, since it is necessary to penetrate the skin and tissues, without proper protection, it may cause damage to the skin and tissues, increase the risk of infection, affect the surgical effect and recovery time. Usually, a sheath tube is used to protect the surgical instruments and body tissues so that the surgeon can smoothly perform the surgery and improve the success rate of the surgery. In addition, during the surgery, the surgeon will complete the drug administration action through the sheath tube. After placing the endoscope into the sheath tube, the drug is injected into the sheath tube, and the drug will be transmitted to the target position along with the flow of the sheath tube to achieve the treatment purpose.

[0004] Since it is necessary to place instruments such as catheters and stents into the blood vessels during the surgery, and these instruments need to be advanced through the inside of the blood vessels, the surgeon needs to monitor the pressure changes inside the blood vessels during the surgery to ensure that the instruments can smoothly pass through the blood vessels and avoid damaging the blood vessels; and intraoperative pressure measurement can also help the surgeon understand the blood flow condition and functional state of the surgical organ to judge whether the surgical organ and blood vessels are damaged and affected.

[0005] However, the pressure measurement in the related art has the following technical problems:

[0006] (1) It is necessary to first remove the surgical instruments and then place the pressure measurement catheter for pressure measurement. During the surgery, the pressure measurement catheter may damage the surrounding tissues and organs, resulting in other complications, and there may be a risk of infection or blockage of the pressure measurement catheter when using the pressure measurement catheter, which will affect the accuracy and reliability of the pressure measurement;

[0007] (2) Since there is a transient high pressure in the cavity during the surgery, it cannot reflect the real pressure in the cavity, and the acquisition of blood pressure data is not instantaneous, so the output data cannot reflect the real data in real time;

[0008] (3) The pressure monitoring and feedback are realized according to the height of the liquid level difference in the long pipeline, and the measurement accuracy is not high. Summary of the Utility Model

[0009] In view of this, the utility model provides a vascular sheath for interventional therapy and an interventional therapy system to solve at least one of the above technical problems.

[0010] In a first aspect, the present utility model provides a vascular sheath for interventional therapy, which includes a sheath tube assembly and a side tube assembly. The sheath tube assembly includes a sheath tube; the sheath tube has a first channel penetrating through both ends of the sheath tube along its length direction, and the first channel is for surgical instruments to pass through; at least one relief structure is provided on the inner wall of the sheath tube, and when the surgical instrument is inserted into the first channel, a second channel for blood flow or drugs to pass through is formed between the relief structure and the outer wall of the surgical instrument; the side tube assembly includes a side tube and a pressure sensor, the side tube assembly is connected to the sheath tube assembly, and the side tube communicates with the sheath tube; the pressure sensor is adapted to detect the real-time pressure of the blood flow in the second channel.

[0011] Beneficial effects: For the vascular sheath for interventional therapy provided by the present utility model, by providing a relief structure on the inner wall of the sheath tube, after the surgical instrument required for the operation is placed in the sheath tube, there is still a gap for blood flow or drugs to pass through between the relief structure and the outer wall of the surgical instrument, and this gap is the second channel, that is, during the operation, blood flow or drugs can also pass through the sheath tube. At the same time, the side tube in the side tube assembly communicates with the sheath tube, and the blood flow can enter the side tube. A pressure sensor is provided in the side tube assembly to monitor the blood flow in the sheath tube in real time to complete pressure measurement. By using the vascular sheath for interventional therapy provided by the present utility model, it is possible to avoid vascular injuries that may be caused by replacing instruments for pressure measurement during the operation, reduce the surgical risk, and be able to monitor in real time, which can improve the measurement accuracy and reflect the real data; at the same time, the operator can also complete the drug administration action through the second channel.

[0012] In an optional embodiment, the relief structure includes a groove, and the groove extends along the length direction of the sheath tube to both ends of the sheath tube; when the surgical instrument is inserted into the first channel, the groove and the outer wall of the surgical instrument constitute the second channel;

[0013] Or, the inner wall of the sheath tube is a curved surface, the relief structure is an arc segment with a different curvature radius, and the curvature radius of the arc segment with a different curvature is not equal to the outer circle curvature radius of the surgical instrument, and the arc segment with a different curvature and the outer wall of the surgical instrument constitute the second channel.

[0014] In an optional embodiment, two or more relief structures are provided and are distributed at intervals around the first channel.

[0015] In an optional embodiment, the sheath tube assembly further includes a sheath tube seat, and a third channel is provided in the sheath tube seat. The sheath tube seat has a first port and a second port communicating with the third channel. The first port of the sheath tube seat is connected to the proximal end of the sheath tube, and the second port of the sheath tube seat is connected to the first end of the side tube. The first channel, the third channel and the second channel communicate with each other.

[0016] In an optional embodiment, the side tube assembly further includes a control valve, and the control valve is connected to the second end of the side tube; the pressure sensor is provided on the control valve.

[0017] In an alternative embodiment, it further includes a sheath connector which has a fourth channel;

[0018] The sheath base further includes a third port communicating with the third channel. The sheath connector is connected to the third port of the sheath base, and the fourth channel communicates with the first channel.

[0019] In an alternative embodiment, the surface of the sheath is provided with a hydrophilic coating.

[0020] In an alternative embodiment, the surface of the sheath base is provided with an anti-slip structure.

[0021] In an alternative embodiment, the sheath and the sheath base are of an integrally formed structure.

[0022] In a second aspect, the present utility model further provides an interventional therapy system, including a vascular sheath for interventional therapy according to any one of the above technical solutions, and a surgical instrument. The surgical instrument is adapted to pass through the first channel of the vascular sheath for interventional therapy, and when the surgical instrument is placed in the first channel, a second channel for blood flow or drug to pass through is formed between the outer wall of the surgical instrument and the inner wall of the sheath.

[0023] Advantageous effects: Since the interventional therapy system includes a vascular sheath for interventional therapy, it has the same effects as the vascular sheath for interventional therapy, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is the front view of a vascular sheath for interventional therapy according to an embodiment of the present utility model;

[0026] Figure 2 It is Figure 1 the sectional view along A-A in

[0027] Figure 3 It is Figure 1 the sectional view along A-A when the vascular sheath for interventional therapy shown in Figure 1 cooperates with the surgical instrument;

[0028] Figure 4 It is another sectional view along A-A when the vascular sheath for interventional therapy according to an embodiment of the present utility model cooperates with the surgical instrument in Figure 1 ;

[0029] Figure 5 Another cross-sectional view taken at A-A in the accompanying drawings when the vascular sheath for interventional therapy and the surgical instrument according to an embodiment of the present utility model are cooperating Figure 1 as shown in the accompanying drawings;

[0030] Figure 6 Another cross-sectional view taken at A-A in the accompanying drawings when the vascular sheath for interventional therapy and the surgical instrument according to an embodiment of the present utility model are cooperating Figure 1 as shown in the accompanying drawings.

[0031] Explanation of reference numerals:

[0032] 1. Sheath tube; 11. First channel; 12. Second channel; 2. Side tube; 3. Sheath tube seat; 4. Sheath tube joint; 5. Control valve; 6. Surgical instrument. Detailed implementation manners

[0033] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0034] In the related art of wire-winding surgery, there are the following three pressure measurement methods:

[0035] First, it is achieved by measuring the pressure inside the sheath tube. During the surgery, if pressure measurement is required, the surgical instrument needs to be first taken out from the sheath tube channel, and then a dedicated pressure measurement catheter is inserted into the sheath tube for pressure measurement.

[0036] Second, a sensor is directly disposed at the distal end of the sheath tube, and the pressure is directly detected after the sheath tube enters the cavity.

[0037] Third, direct pressure measurement is performed through a pressure sensor. The sensor is installed in the main control machine device and is connected to the sheath tube through a pipeline to achieve pressure monitoring.

[0038] Regarding the pressure measurement methods, the above three methods have the following disadvantages:

[0039] For the first pressure measurement method, since the gap between the inner wall of the sheath tube and the outer wall of the surgical instrument required is extremely small and there is almost no blood flow, it is necessary to first take out the surgical instrument and then insert the pressure measurement catheter for pressure measurement. During the surgery, the pressure measurement catheter may damage the surrounding tissues and organs, resulting in other complications, and there may be a risk of infection or blockage of the pressure measurement catheter when using the pressure measurement catheter, which will affect the accuracy and reliability of the pressure measurement.

[0040] For the second pressure measurement method, since there is instantaneous high pressure in the cavity during the operation, it cannot reflect the actual pressure in the cavity, and the collection of blood pressure data is not completed instantaneously, the output data cannot reflect the real data in real time.

[0041] For the third pressure measurement method, pressure monitoring and feedback are achieved based on the height of the liquid level difference in a long pipeline, and the measurement accuracy is not high.

[0042] Regarding the method of drug administration, for the above three methods, the drug administration method is similar to the first pressure measurement method. First, the surgical instrument is removed from the sheath channel, and then the observation mirror is inserted into the sheath. The drug is injected into the sheath. The drug will flow through the sheath and be transmitted to the target position to achieve the purpose of treatment.

[0043] Therefore, the utility model is used to solve the above-mentioned technical problems.

[0044] Combine the following Figures 1 to 6 , describing an embodiment of the utility model.

[0045] According to an embodiment of the utility model, on the one hand, a vascular sheath for interventional treatment is provided, including a sheath assembly and a side tube assembly. The sheath assembly includes a sheath 1; the sheath 1 has a first channel 11 that runs through both ends of the sheath 1 along its length direction, and the first channel 11 is for the surgical instrument 6 to pass through; the inner wall of the sheath 1 is provided with at least one give-way structure, and when the surgical instrument 6 is placed in the first channel 11, a second channel 12 for blood flow or drug to pass through is formed between the give-way structure and the outer wall of the surgical instrument 6; the side tube assembly includes a side tube 2 and a pressure sensor, the side tube assembly is connected to the sheath assembly, and the side tube 2 is connected to the sheath 1; the pressure sensor is suitable for detecting the real-time pressure of the blood flow in the second channel 12.

[0046] Specifically, “a cross section of the inner wall of the sheath tube 1 ” refers to a cross section perpendicular to the length direction of the sheath tube 1 .

[0047] Specifically, the surgical instrument 6 includes a guide catheter, a guide wire, an intermediate catheter (support catheter) or a microcatheter.

[0048] The channel cross-section of a traditional sheath is circular, and its inner diameter is adapted to the outer diameter of the surgical instrument. The gap between the inner wall of the traditional sheath and the outer wall of the surgical instrument is not sufficient for blood flow or drug infusion. Therefore, during surgery, if blood pressure monitoring or drug infusion is required, the surgical instrument must be removed and a pressure measuring catheter must be inserted for pressure measurement or drug infusion. This process takes more time and may cause damage and increase the risk of surgery.

[0049] The vascular sheath for interventional treatment provided by the utility model, the function of the sheath tube 1 is to create a surgical channel for the operator to complete the operation, in response to the operator's need to monitor the patient's status in real time during the operation to ensure that the operation is carried out better. By setting a yielding structure on the inner wall of the sheath tube 1, after the surgical instrument 6 required for the operation is placed in the sheath tube 1, there is still a gap between the yielding structure and the outer wall of the surgical instrument 6 for blood flow or drug to pass through, and the gap is the second channel 12, that is, during the operation, blood flow or drug can also pass through the sheath tube 1. At the same time, the side tube 2 in the side tube assembly is connected to the sheath tube 1, and the blood flow can enter the side tube 2. A pressure sensor is set in the side tube assembly, and the blood flow in the sheath tube 1 can be monitored in real time to complete the pressure measurement. Using the vascular sheath for interventional treatment provided by the utility model, it is possible to avoid vascular damage caused by replacing instruments for pressure measurement during the operation, reduce surgical risks, and can be monitored in real time, which can improve the measurement accuracy and reflect real data; at the same time, the operator can also complete the drug administration action through the second channel 12. In addition, the utility model can simplify surgical actions and reduce the risks of surgery, helping surgeons to better understand the blood flow conditions and functional status of surgical organs to determine whether surgical organs and blood vessels are damaged and affected.

[0050] In some embodiments, the yield structure includes a groove extending along the length direction of the sheath 1 to both ends of the sheath 1 ; when the surgical instrument 6 is placed in the first channel 11 , a second channel 12 is formed between the groove and the outer wall of the surgical instrument 6 .

[0051] Specifically, the shape of the groove is not limited, including arc shape or trapezoidal shape. Figure 2 In the embodiment shown, the cross-section of the groove is semicircular. Figure 6 In the example, the arc of the groove is the major arc.

[0052] In some embodiments, the inner wall of the sheath 1 is a curved surface, and the yield structure is an arc segment, the curvature radius of the arc segment is different from the curvature radius of the outer circle of the surgical instrument 6, and a second channel 12 is formed between the arc segment and the outer wall of the surgical instrument 6.

[0053] Specifically, in Figure 4 In the illustrated embodiment, the inner wall of the sheath 1 is elliptical. Since the ellipse has a long radius and a short radius, the short radius can be adapted to the outer diameter of the surgical instrument 6, and the arc segment at the long radius constitutes an arc segment whose curvature radius is not equal to the outer diameter of the surgical instrument 6. Therefore, when the surgical instrument 6 is inserted into the first channel 11, the gap between the arc segment at the long radius and the outer wall of the surgical instrument 6 constitutes a second channel 12, through which blood or drugs can pass.

[0054] In such Figure 5In the illustrated embodiment, the inner wall of the sheath tube 1 is circular, and the inner diameter of the sheath tube 1 is greater than the outer radius of the surgical instrument 6. When the surgical instrument 6 is placed in the first channel 11, similarly, a gap can exist between the inner wall of the sheath tube 1 and the outer wall of the surgical instrument 6, forming the second channel 12.

[0055] In some embodiments, two or more relief structures are provided and are spaced around the first channel 11.

[0056] With this arrangement, after the surgical instrument 6 is inserted into the first channel 11, the surgical instrument 6 is located in the middle of the first channel 11, and two or more second channels 12 can be formed between the outer peripheral wall of the surgical instrument 6 and the two or more second channels 12. In this way, blood flow can be dispersed around the surgical instrument 6, reducing local blood flow pressure. It can also be that one of the second channels 12 is used for blood flow to pass through, and another second channel 12 is used for drug administration.

[0057] In the embodiment as Figure 4 shown, two second channels 12 are provided and are spaced around the first channel 11.

[0058] In some embodiments, the sheath assembly further includes a sheath base 3. A third channel is provided in the sheath base 3. The sheath base 3 has a first port and a second port communicating with the third channel. The first port of the sheath base 3 is connected to the proximal end of the sheath tube 1, and the second port of the sheath base 3 is connected to the first end of the side tube 2. The first channel 11, the third channel, and the second channel 12 are in communication.

[0059] With this arrangement, through the third channel of the sheath base 3, the sheath tube 1 and the side tube 2 can be connected, so that the pressure sensor can perform real-time pressure measurement on the blood flow in the sheath tube 1.

[0060] In some embodiments, the side tube assembly further includes a control valve 5. The control valve 5 is connected to the second end of the side tube 2; the pressure sensor is provided on the control valve 5.

[0061] Specifically, the hemostasis function can be achieved by setting the control valve 5. In some embodiments, the pressure sensor is integrated into the control valve 5. Further, the control valve 5 is a three-way valve.

[0062] In some embodiments, a sheath connector 4 is further included. The sheath connector 4 has a fourth channel; the sheath base 3 further includes a third port communicating with the third channel. The sheath connector 4 is connected to the third port of the sheath base 3, and the fourth channel is in communication with the first channel 11.

[0063] Specifically, in the embodiment as Figure 1In the illustrated embodiment, the first port and the third port are respectively located at two axial ends of the sheath base 3. In this way, it is convenient for the surgical instrument 6 to be inserted into the fourth channel of the sheath connector 4 from the third port, then enter the third channel of the sheath base 3, and further enter the first channel 11 of the sheath 1. The second port is on the side of the sheath base 3.

[0064] In some embodiments, the surface of the sheath 1 is provided with a hydrophilic coating.

[0065] By providing a hydrophilic coating on the surface of the sheath 1, the friction between the sheath 1 and the skin can be reduced, and the puncture resistance can be reduced to reduce complications.

[0066] In some embodiments, the surface of the sheath base 3 is provided with an anti-slip structure.

[0067] The sheath base 3 is the part held by the operator. No hydrophilic coating is provided at this part, and an anti-slip structure is provided here, which has anti-slip performance. It can facilitate the operation of the operator while ensuring that the sheath 1 is not easily slid during the operation.

[0068] In some embodiments, the sheath 1 and the sheath base 3 are of an integrally formed structure.

[0069] With such a setting, a good sealing performance can be achieved between the sheath 1 and the sheath base 3.

[0070] Furthermore, between the sheath base 3 and the side tube 2, between the sheath base 3 and the sheath connector 4, and between the side tube 2 and the control valve 5 are all bonded by glue.

[0071] According to an embodiment of the present invention, on the other hand, an interventional treatment system is further provided, including the vascular sheath for interventional treatment described in any one of the above embodiments, and a surgical instrument 6. The surgical instrument 6 is adapted to pass through the first channel 11 of the vascular sheath for interventional treatment, and when the surgical instrument 6 is placed in the first channel 11, a second channel 12 for blood flow or drug to pass through is formed between the outer wall of the surgical instrument 6 and the inner wall of the sheath 1.

[0072] Since the interventional treatment system includes a vascular sheath for interventional treatment, it has all the technical effects of the vascular sheath for interventional treatment, including:

[0073] (1) Different channels are provided for the operation of the surgical instrument 6 and the circulation of blood flow, and the requirements of the operator can be achieved without replacing different devices during the operation, simplifying the surgical operation and reducing the surgical risk.

[0074] (2) Traditional pressure measurement operations can only complete the pressure monitoring at a certain moment, and the obtained monitoring data is not accurate enough; while in this embodiment, the real-time flowing blood flow channel can complete the blood flow monitoring at any moment, and accurate pressure measurement can be achieved.

[0075] (3) The created blood flow channel can also be used as a delivery channel for perfusing drugs, which is convenient for treatment.

[0076] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A vascular sheath for interventional treatment, characterized in that: include: A sheath tube assembly, the sheath tube assembly comprising a sheath tube (1); the sheath tube (1) having a first channel (11) penetrating through both ends of the sheath tube (1) along its length direction, the first channel (11) being for a surgical instrument (6) to pass through; the inner wall of the sheath tube (1) being provided with at least one clearance structure, when the surgical instrument (6) is placed in the first channel (11), a second channel (12) for blood flow or drug to pass through is formed between the clearance structure and the outer wall of the surgical instrument (6); A side tube assembly, the side tube assembly comprising a side tube (2) and a pressure sensor, the side tube assembly being connected to the sheath tube assembly, the side tube (2) being in communication with the sheath tube (1); the pressure sensor being suitable for detecting the real-time pressure of the blood flow in the second channel (12).

2. The vascular sheath for interventional treatment according to claim 1, characterized in that: The giving way structure comprises a groove, and the groove extends along the length direction of the sheath tube (1) to both ends of the sheath tube (1); when the surgical instrument (6) is placed in the first channel (11), the second channel (12) is formed between the groove and the outer wall of the surgical instrument (6); Alternatively, the inner wall of the sheath tube (1) is a curved surface, the yield structure is an arc segment, the radius of curvature of the arc segment is different from the radius of curvature of the outer circle of the surgical instrument (6), and the second channel (12) is formed between the arc segment and the outer wall of the surgical instrument (6).

3. The vascular sheath for interventional treatment according to claim 2, characterized in that: Two or more of the giving way structures are provided and are distributed at intervals around the first channel (11).

4. The vascular sheath for interventional treatment according to any one of claims 1 to 3, characterized in that: The sheath assembly also includes a sheath seat (3), a third channel is provided in the sheath seat (3), the sheath seat (3) has a first port and a second port connected to the third channel, the first port of the sheath seat (3) is connected to the proximal end of the sheath (1), the second port of the sheath seat (3) is connected to the first end of the side tube (2), and the first channel (11), the third channel and the second channel (12) are connected.

5. The vascular sheath for interventional treatment according to claim 4, characterized in that: The side pipe assembly further comprises a control valve (5), wherein the control valve (5) is connected to the second end of the side pipe (2); and the pressure sensor is arranged on the control valve (5).

6. The vascular sheath for interventional treatment according to claim 4, characterized in that: It also includes a sheath tube connector (4), wherein the sheath tube connector (4) has a fourth channel; The sheath tube seat (3) further comprises a third port communicated with the third channel, the sheath tube connector (4) is connected to the third port of the sheath tube seat (3), and the fourth channel is communicated with the first channel (11).

7. The vascular sheath for interventional treatment according to any one of claims 1 to 3, characterized in that: The surface of the sheath tube (1) is provided with a hydrophilic coating.

8. The vascular sheath for interventional treatment according to claim 4, characterized in that: The surface of the sheath tube seat (3) is provided with an anti-slip structure.

9. The vascular sheath for interventional treatment according to claim 4, characterized in that: The sheath tube (1) and the sheath tube seat (3) are an integrally formed structure.

10. An interventional therapy system, characterized in that: include: The vascular sheath for interventional treatment according to any one of claims 1 to 9; A surgical instrument (6) is suitable for passing through a first channel (11) of a vascular sheath for interventional treatment, and when the surgical instrument (6) is placed in the first channel (11), a second channel (12) is formed between the outer wall of the surgical instrument (6) and the inner wall of the sheath (1) for blood flow or drug to pass through.

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