Interventional intravascular imaging catheter
By using a bushing and stress relief groove design in the interventional intravascular imaging catheter, combined with a multi-layer sheath structure, the problem of imaging lens shake during high-speed rotation and retraction is solved, thus improving imaging quality and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-24
AI Technical Summary
In existing technologies, the imaging lens of interventional intravascular imaging catheters experiences severe shaking during high-speed rotation and retraction, leading to image distortion and affecting imaging quality.
The bushing is fixed inside the housing and sleeved on the outside of the imaging component. Combined with stress relief grooves and multi-layer sheath structure, it reduces the shaking of the imaging component during high-speed rotation and retraction. The design of nickel-titanium tube and rotating wire enhances stability.
It effectively reduces the jitter of the imaging components during high-speed rotation and retraction, improves imaging quality, and ensures image clarity and stability.
Smart Images
Figure CN224023558U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of intervention catheter, especially to an interventional intravascular imaging catheter. BACKGROUND
[0002] The disposable intravascular imaging catheter (OCT catheter) sends a miniature imaging lens into a blood vessel cavity through intravascular intervention technology, drives the imaging lens in the catheter at high speed through a catheter driving unit in an optical coherence tomography imaging device, and transmits near-infrared light through an optical fiber, so that real-time optical coherence tomography can be obtained, a blood vessel cross-sectional image is displayed, and thus in-vivo blood vessel cavity imaging is provided.
[0003] In the prior art, the disposable intravascular imaging catheter is driven by a catheter driving unit to rotate at an ultra-high speed, and the rotation speed is as high as 12000 revolutions per minute, and meanwhile, the catheter is quickly withdrawn, and the entire withdrawal time lasts less than 5 seconds. During the entire high-speed rotation and withdrawal process of the imaging lens, if the lens shakes seriously, image distortion and aberration will be caused, the image quality will be affected, and even the lesion cannot be judged. Therefore, the stability of the imaging lens is a key factor affecting the imaging quality. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing an interventional intravascular imaging catheter, which can minimize the shaking of an imaging assembly during the entire high-speed rotation and withdrawal process, so as to ensure the imaging quality.
[0005] To achieve the purpose, the utility model adopts the following technical solutions:
[0006] The interventional intravascular imaging catheter comprises:
[0007] A tube body comprises a shell and a sheath assembly, and the proximal end of the sheath assembly is connected to the distal end of the shell;
[0008] An imaging component is arranged in the tube body and can rotate relative to the tube body and move along the axial direction of the tube body. The imaging component comprises an optical fiber plug and an imaging assembly. The optical fiber plug is located in the shell, the proximal end of the imaging assembly is inserted into the optical fiber plug, and the distal end of the imaging assembly extends through the shell and into the distal end of the sheath assembly.
[0009] A shaft sleeve is fixedly arranged in the shell and sleeved on the outside of the imaging assembly.
[0010] As an optional solution, the shaft sleeve is made of hard plastic.
[0011] As an optional solution, a plurality of stress release grooves are formed in the distal end side wall of the shell.
[0012] As an optional solution, the sheath assembly comprises a proximal sheath, a middle sheath and a distal sheath, the proximal end of the proximal sheath is connected with the shell, the distal end of the proximal sheath is connected with the proximal end of the middle sheath through a stress release element, and the distal end of the middle sheath forms the distal sheath.
[0013] As an optional solution, the proximal sheath is made of polyamide.
[0014] As an optional solution, the stress release element is made of a low-hardness thermoplastic elastomer.
[0015] As an optional solution, the sheath assembly further comprises a first connector and a second connector, the first connector is inserted into the distal end of the shell, the second connector is sleeved on the proximal end of the proximal sheath, and the second connector is clamped and matched with the first connector.
[0016] As an optional solution, an induction coil is sleeved on the outer peripheral wall of the shell.
[0017] As an optional solution, a protective sleeve is sleeved on the shell, and the protective sleeve covers the induction coil.
[0018] As an optional solution, the imaging assembly comprises:
[0019] A nickel-titanium tube, one end of the nickel-titanium tube is inserted into the optical fiber plug, the other end of the nickel-titanium tube passes through the shell and extends into the sheath assembly, and the shaft sleeve is sleeved on the nickel-titanium tube;
[0020] A rotating wire, one end of the rotating wire is inserted into the optical fiber plug, the other end of the rotating wire passes through the nickel-titanium tube and extends into the distal end of the sheath assembly, and the distal end of the rotating wire is connected with a shell, and a notch is formed in the side wall of the shell;
[0021] A conductive optical fiber, one end of the conductive optical fiber is inserted into the optical fiber plug, the other end of the conductive optical fiber passes into the rotating wire and extends to the distal end of the rotating wire; and
[0022] An imaging lens, connected to the distal end of the conductive optical fiber and exposed to the notch.
[0023] The utility model discloses the beneficial effects of:
[0024] The utility model provides an intervention formula blood vessel end imaging catheter, wherein under the drive of catheter drive unit, imaging part can rotate high speed relative to the tubular body, and removes fastly along the axial movement of tubular body, because the shaft sleeve is fixedly arranged in the shell and is sleeved on the imaging assembly, therefore during the whole high speed rotation removal process, the shaft sleeve can support the imaging assembly to the certain, and the imaging assembly is removed in the whole high speed rotation process as little as possible, thereby the lens shake of the imaging assembly distal end is reduced, so as to guarantee the imaging quality. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 It is the structure schematic diagram of intervention formula blood vessel end imaging catheter provided by the utility model,
[0026] Figure 2 It is Figure 1 It is the partial close -up view of A-A in,
[0027] Figure 3 It is Figure 2 It is the partial schematic view of near the proximal end in,
[0028] Figure 4 It is the structure schematic diagram of imaging part provided by the utility model,
[0029] Figure 5 It is Figure 4 It is the partial close -up view of B in.
[0030] In the drawing,
[0031] 1, tubular body;11, shell;111, stress release groove;12, sheath tube assembly;121, proximal sheath tube;122, middle sheath tube;123, distal sheath tube;124, stress release piece;125, first joint;126, second joint;
[0032] 2, imaging part;21, optical fiber plug;22, imaging assembly;221, nickel titanium pipe;222, wire;223, shell;2231, notch;224, conducting optical fiber;225, imaging lens;226, developing ring;227, sleeve;
[0033] 3, shaft sleeve;4, inductive coil;5, protective sleeve;6, sealing ring. DETAILED DESCRIPTION
[0034] The utility model makes further detailed explanation in combination with the drawings and embodiment, can understand, the specific embodiment described here is only for explaining the utility model, and is not the limitation to the utility model.In addition, it is still necessary to explain that in order to facilitate the description, only the part relevant to the utility model is shown in the drawing but not all structures.
[0035] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements internal communication or two element mutual action relation.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.
[0036] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features is not direct contact but is through the contact between other features between them.And, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the first feature horizontal height is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the first feature horizontal height is less than the second feature.
[0037] In the description of the embodiment, the term "on", "under", "right", etc. Orientation or position relationship is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the term "first", "second" is only used to distinguish in the description, and has no special meaning.
[0038] In this paper, "distal end" generally refers to the end of the interventional intravascular imaging catheter away from the operator, "proximal end" is opposite to "distal end", generally refers to the end of the interventional intravascular imaging catheter close to the operator.
[0039] As Figures 1 to 3As shown, the embodiment provides an interventional intravascular imaging catheter (OCT catheter), which comprises a tube body 1, an imaging component 2 and a shaft sleeve 3. The tube body 1 comprises a shell 11 and a sheath assembly 12. The shell 11 is made of a high-hardness thermoplastic elastomer (TPE) material and has a certain hardness, which can be connected to a catheter driving unit as an interface. The proximal end of the sheath assembly 12 is connected to the distal end of the shell 11. The imaging component 2 is arranged in the tube body 1 and can rotate relative to the tube body 1 and move along the axial direction of the tube body 1. The imaging component 2 comprises a fiber plug 21 and an imaging assembly 22. The fiber plug 21 is located in the shell 11 and is plugged with a fiber coupler of the catheter driving unit. The proximal end of the imaging assembly 22 is plugged into the fiber plug 21. The distal end of the imaging assembly 22 extends into the distal end of the sheath assembly 12 through the shell 11. The shaft sleeve 3 is fixedly arranged in the shell 11 and is sleeved on the imaging assembly 22.
[0040] The interventional intravascular imaging catheter provided by the embodiment can rotate at high speed relative to the tube body 1 under the driving of the catheter driving unit and move along the axial direction of the tube body 1 for rapid withdrawal. Since the shaft sleeve 3 is fixedly arranged in the shell 11 and is sleeved on the imaging assembly 22, the shaft sleeve 3 can support the imaging assembly 22 to a certain extent during the entire high-speed rotation and withdrawal process, so as to minimize the jumping of the imaging assembly 22 during the entire high-speed rotation and withdrawal process, thereby reducing the lens shaking of the distal end of the imaging assembly 22 and ensuring the imaging quality.
[0041] In the embodiment, the shaft sleeve 3 is made of hard plastic (ABS). In this way, when the imaging assembly 22 rotates relative to the shaft sleeve 3 and withdraws, the wear resistance of the shaft sleeve 3 can be increased, and the service life of the shaft sleeve 3 can be prolonged.
[0042] Further, as shown, Figures 1 to 3 The distal end of the shell 11 is relatively thin, and a plurality of annular stress release grooves 111 are formed on the sidewall of the distal end of the shell 11. By arranging the stress release grooves 111, the stress release effect can be achieved, so that the distal end of the shell 11 has a certain deformability, which can slow down the transmission of the shaking of the proximal end to the distal end to a certain extent.
[0043] In combination with Figures 2 to 5The imaging assembly 22 comprises a nickel-titanium tube 221, a rotating wire 222, a conducting optical fiber 224 and an imaging lens 225. One end of the nickel-titanium tube 221 is inserted into the optical fiber plug 21 and fixedly glued to the optical fiber plug 21. The other end of the nickel-titanium tube 221 penetrates through the housing 11 and extends into the sheath assembly 12. The shaft sleeve 3 is sleeved on the nickel-titanium tube 221. The nickel-titanium tube 221 supports high-speed rotation and retraction, and has a certain toughness, so it is not easy to be bent. The inner hole of the housing 11 has a slightly larger diameter than the outer diameter of the nickel-titanium tube 221, so that the nickel-titanium tube 221 can reduce the jumping when rotating at high speed. One end of the rotating wire 222 is inserted into the optical fiber plug 21 and fixedly connected to the nickel-titanium tube 221 sleeved on the outside of the rotating wire 222. The other end of the rotating wire 222 penetrates through the nickel-titanium tube 221 and extends into the distal end of the sheath assembly 12. The distal end of the rotating wire 222 is connected with a shell 223, and a notch 2231 is formed in the side wall of the shell 223. One end of the conducting optical fiber 224 is inserted into the optical fiber plug 21 and fixedly connected to the optical fiber plug 21. The other end of the conducting optical fiber 224 penetrates into the rotating wire 222 and extends to the distal end of the rotating wire 222. The imaging lens 225 is connected to the distal end of the conducting optical fiber 224 and exposed at the notch 2231. The infrared light is transmitted to the conducting optical fiber 224 through the optical fiber plug 21. The imaging lens 225 can receive the infrared light transmitted by the conducting optical fiber 224 and can reflect the infrared light. During the rotation and retraction, the cross-sectional image of the blood vessel is obtained.
[0044] As shown in Figure 4 , the rotating wire 222 is sleeved with a developing ring 226. The developing ring 226 is a marker ring used for developing the distal working area in the interventional therapy, which belongs to the prior art and will not be described here.
[0045] Further, as shown in Figure 3 , the imaging assembly 2 further comprises a sleeve shell 227. The sleeve shell 227 is located in the housing 11 and sleeved on the optical fiber plug 21. The sleeve shell 227 is used for sleeving with the optical fiber coupler of the catheter driving unit. When the catheter driving unit rotates, the optical fiber coupler of the catheter driving unit rotates, and at the same time drives the sleeve shell 227 and the optical fiber plug 21 to rotate. The optical fiber plug 21 drives the nickel-titanium tube 221, the rotating wire 222, the conducting optical fiber 224 and the imaging lens 225 to rotate.
[0046] As shown in Figure 3 , a sealing ring 6 is arranged between the sleeve shell 227 and the housing 11, which can prevent liquid from entering the catheter driving unit and causing damage to the catheter driving unit.
[0047] Further, as shown in Figure 1 and Figure 2As shown, the sheath assembly 12 comprises a proximal sheath 121, a middle sheath 122 and a distal sheath 123, the proximal end of the proximal sheath 121 is connected with the housing 11, the distal end of the proximal sheath 121 is connected with the proximal end of the middle sheath 122 through a stress release 124, and the distal end of the middle sheath 122 forms the distal sheath 123. It should be noted that the stress release 124 plays a role in stress release, and the stress release 124 in the prior art can be used, and details are not repeated here.
[0048] In an optional embodiment, the proximal sheath 121 is made of polyamide (PA, commonly known as nylon). In this way, the proximal sheath 121 has certain strength to support the tube body and certain toughness to further reduce the shaking of the high-speed rotating nickel-titanium tube 221.
[0049] In an optional embodiment, the stress release 124 is made of a low-hardness thermoplastic elastomer (TPE). In this way, the stress release 124 can play a better supporting and connecting role and also play a stress release role, further reducing the shaking of the high-speed rotating proximal end to a minimum.
[0050] Further, as shown in Figure 1 and Figure 2 , the sheath assembly 12 further comprises a first connector 125 and a second connector 126, the first connector 125 is inserted into the distal end of the housing 11, and the second connector 126 is sleeved on the proximal end of the proximal sheath 121. The second connector 126 is snap-fitted with the first connector 125. The proximal sheath 121 and the housing 11 are detachably connected by snap-fitting the first connector 125 and the second connector 126, which not only has high connection stability, but also is easy to assemble and disassemble, and has stronger operability.
[0051] As shown in Figure 3 , an induction coil 4 is sleeved on the outer peripheral wall of the housing 11. The induction coil 4 can be inducted with the coil in the catheter driving unit, reminding the operator that the catheter is successfully connected with the catheter driving unit, and recording the information of the product, and completing product traceability.
[0052] Further, as shown in Figure 3 , a protective sleeve 5 is sleeved on the housing 11, and the protective sleeve 5 covers the induction coil 4. The protective sleeve 5 can shield and cover the induction coil 4, protecting the induction coil 4 and ensuring the aesthetic appearance of the catheter.
[0053] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.
Claims
1. An interventional intravascular imaging catheter, characterized in that, The utility model relates to a kind of endoscope, including: Tube body (1), including shell (11) and sheath tube component (12), the proximal end of the sheath tube component (12) is connected in the distal end of the shell (11); Imaging component (2) is arranged in the tube body (1), and can rotate relative to the tube body (1) and move along the axial direction of the tube body (1), the imaging component (2) includes optical fiber plug (21) and imaging component (22), the optical fiber plug (21) is located in the shell (11), the proximal end of the imaging component (22) is inserted into the optical fiber plug (21), the distal end of the imaging component (22) passes through the shell (11) and extends in the distal end of the sheath tube component (12); Sleeve (3) is fixedly arranged in the shell (11) and is sleeved on the imaging component (22).
2. The interventional intravascular imaging catheter of claim 1, wherein, The sleeve (3) is made of hard plastic.
3. The interventional intravascular imaging catheter of claim 1, wherein, A plurality of stress release grooves (111) are formed on the distal end side wall of the shell (11).
4. The interventional intravascular imaging catheter of claim 1, wherein, The sheath tube component (12) includes a proximal sheath tube (121), a middle sheath tube (122), and a distal sheath tube (123). The proximal end of the proximal sheath tube (121) is connected to the shell (11). The distal end of the proximal sheath tube (121) is connected to the proximal end of the middle sheath tube (122) through a stress release member (124). The distal end of the middle sheath tube (122) forms the distal sheath tube (123).
5. The interventional intravascular imaging catheter of claim 4, wherein, The proximal sheath tube (121) is made of polyamide material.
6. The interventional intravascular imaging catheter of claim 4, wherein, The stress release member (124) is made of a low-hardness thermoplastic elastomer.
7. The interventional intravascular imaging catheter of claim 4, wherein, The sheath tube component (12) further includes a first connector (125) and a second connector (126). The first connector (125) is inserted into the distal end of the shell (11). The second connector (126) is sleeved on the proximal end of the proximal sheath tube (121). The second connector (126) is clamped and matched with the first connector (125).
8. The interventional intravascular imaging catheter of claim 1, wherein, An induction coil (4) is sleeved on the peripheral wall of the shell (11).
9. The interventional intravascular imaging catheter of claim 8, wherein, A protective sleeve (5) is sleeved on the shell (11), and the protective sleeve (5) covers the induction coil (4).
10. The interventional intravascular imaging catheter of claim 1, wherein, The imaging component (22) includes: A nickel-titanium tube (221) is inserted into the optical fiber plug (21) at one end and extends into the sheath tube component (12) at the other end. The sleeve (3) is sleeved on the nickel-titanium tube (221); A rotating wire (222) is inserted into the optical fiber plug (21) at one end and extends into the distal end of the sheath tube component (12) at the other end. The distal end of the rotating wire (222) is connected to a housing (223). A notch (2231) is formed on the side wall of the housing (223); A conductive optical fiber (224) is inserted into the optical fiber plug (21) at one end and extends into the distal end of the rotating wire (222) at the other end; and A conductive optical fiber (224) is inserted into the optical fiber plug (21) at one end and extends into the distal end of the rotating wire (222) at the other end. An imaging lens (225) connected to the distal end of the conducting optical fiber (224) and exposed at the aperture (2231).