Intracardiac ultrasound imaging catheter and intracardiac ultrasound imaging system

Abstract

The utility model provides a kind of intracardiac ultrasonic imaging catheter, including catheter assembly, catheter assembly includes inner sleeve, transmission shaft, ultrasonic transducer and at least one bending wire, inner sleeve includes the proximal tube and distal tube of intercommunication, and the end of distal tube is closed;Transmission shaft is arranged in the inner chamber of proximal tube, and ultrasonic transducer is fixedly connected at the distal end of transmission shaft, and is arranged in the inner chamber of distal tube;The distal end of bending wire is connected with the distal end of inner sleeve, and bending wire extends to proximal end along the outer wall of inner sleeve;Drive transmission shaft, can drive ultrasonic transducer rotate in the inner chamber of inner sleeve, by controlling bending wire, can drive distal tube and ultrasonic transducer deflect relative to proximal tube.The utility model also provides a kind of intracardiac ultrasonic imaging system.The intracardiac ultrasonic imaging system provided by the utility model can realize automatic rotation, manual rotation and manual bending of ultrasonic transducer, and can meet the imaging requirements of different angles.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an intracardiac ultrasound imaging catheter and an intracardiac ultrasound imaging system. Background Technology

[0002] Intracardiac echocardiography (ICE) is an advanced imaging technique that uses ultrasound waves to create real-time images inside the heart, helping doctors better assess the heart's structure and function.

[0003] Existing intracardiac ultrasound imaging catheters typically have multiple bending lines connected to an operating handle within the catheter body. The bending of the catheter tip is controlled by the operating handle, allowing the ultrasound imaging transducer installed in the distal catheter to acquire image information of the target area. However, this structure produces inconsistent imaging results for tissues at different locations in front of the blood vessel, thus limiting the effectiveness of the examination. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide an intracardiac ultrasound imaging catheter and intracardiac ultrasound imaging system with excellent all-round imaging effect.

[0005] One objective of this invention is to provide an intracardiac ultrasound imaging catheter, comprising a catheter assembly including an inner sheath, a drive shaft, an ultrasound transducer, and at least one adjusting wire. The inner sheath includes a proximal tube and a distal tube that are connected, with the distal end of the distal tube closed. The drive shaft passes through the lumen of the proximal tube, and the ultrasound transducer is fixedly connected to the distal end of the drive shaft and passes through the lumen of the distal tube. The distal end of the adjusting wire is connected to the distal end of the inner sheath, and the adjusting wire extends along the outer wall of the inner sheath to the proximal end. Driving the transmission shaft can cause the ultrasonic transducer to rotate within the inner cavity of the inner sleeve. By controlling the bending screw, the distal tube and the ultrasonic transducer can be deflected relative to the proximal tube.

[0006] Furthermore, there are two bending wires, which are arranged opposite to each other on the side of the inner sleeve. By controlling the tension of the two bending wires respectively, the distal tube and the ultrasonic transducer can be driven to deflect in opposite directions relative to the proximal tube.

[0007] Furthermore, the catheter assembly also includes an outer cannula, the diameter of the distal opening of the outer cannula being smaller than its inner diameter; the distal end of the inner cannula is inserted into the proximal end of the outer cannula and exits through the distal opening of the outer cannula; the outer wall of the inner cannula is in close contact with the distal opening of the outer cannula; the distal end of the adjusting wire is connected to the distal end of the outer cannula, and the adjusting wire extends to the proximal end along the cavity formed between the outer wall of the inner cannula and the inner wall of the outer cannula.

[0008] Furthermore, the outer wall of the inner sleeve is provided with an outwardly protruding truncated cone, which is located at the connection between the proximal tube and the distal tube. The radial dimension of the truncated cone gradually decreases from the proximal end to the distal end. When the inner sleeve passes through the distal opening of the outer sleeve, the distal end of the outer sleeve closely abuts against the outer wall of the truncated cone.

[0009] Furthermore, the conduit assembly also includes at least one sealing ring made of at least one material selected from nitrile rubber, silicone rubber, and polyurethane. The outer wall of the cone is provided with at least one circumferentially extending annular groove, the number of which is the same as the number of sealing rings, for accommodating the sealing rings.

[0010] Furthermore, the ultrasound imaging catheter also includes an operating handle, which includes a handle housing, a transmission rod, and a bending adjustment knob. The transmission rod is movably installed inside the handle housing. The bending adjustment knob has a sleeve-like structure and is movably fitted onto the distal end of the handle housing. The proximal end of the catheter assembly passes through the inner cavity of the bending assembly and is connected to the operating handle. The distal end of the bending wire is fixedly connected to the bending knob. By rotating the bending knob, the tension of the bending wire can be adjusted, thereby causing the distal tube and the ultrasonic transducer to deflect relative to the proximal tube. The proximal end of the drive shaft extends from the proximal end of the inner tube and is connected to the drive rod. By driving the drive rod, the drive shaft and the ultrasonic transducer can be rotated in the inner tube.

[0011] Furthermore, the operating handle also includes a manual rotation component, which includes a rotary knob. The rotary knob has a sleeve-like structure and is coaxially sleeved on the proximal end of the bending knob. The drive shaft is connected to the rotary knob. By rotating the rotary knob, the drive shaft and the ultrasonic transducer can be rotated in the inner sleeve.

[0012] Furthermore, the handle housing includes a first fixing part, a second fixing part, and a third fixing part connected sequentially from the proximal end to the distal end. The first fixing part is a sleeve structure with an opening at the proximal end, and the transmission rod is movably inserted into the inner cavity of the first fixing part from the proximal end; The second fixing part is used to install the manual rotation assembly. The manual rotation assembly also includes a transmission gear and a rotation gear that mesh with each other. The inner wall of the rotary knob is provided with a gear that meshes with the transmission gear. The rotation gear is fixedly sleeved on the outside of the transmission shaft. The transmission gear is disposed between the rotation gear and the rotary knob. Rotating the rotary knob can drive the transmission shaft and the ultrasonic transducer to rotate in the inner sleeve in sequence through the transmission gear and the rotation gear. The third fixing part is used to install the bending knob. The third fixing part is provided with a through hole, and the proximal end of the bending wire passes through the through hole and is fixedly connected to the bending knob.

[0013] The second objective of this invention is to provide an intracardiac ultrasound imaging system, comprising the intracardiac ultrasound imaging catheter described in any of the preceding claims and a rotary drive device. The rotary drive device includes a drive motor and a drive shaft connected to the transmission rod. The drive motor drives the transmission shaft and the ultrasound transducer to rotate within the inner tube via the drive shaft and the transmission rod.

[0014] Furthermore, the intracardiac ultrasound imaging system also includes an ultrasound imaging device, which is communicatively connected to the ultrasound transducer via the operating handle. The ultrasound imaging device is used to control the ultrasound transducer to emit ultrasound signals and receive reflected ultrasound echo signals, and to obtain ultrasound images based on the ultrasound echo signals.

[0015] The intracardiac ultrasound imaging system provided by this invention can realize automatic rotation, manual rotation, and manual bending of the ultrasound transducer, thereby enabling the distal part of the intracardiac ultrasound imaging catheter to be adjusted at multiple angles after implantation in the human body. Compared with the intracardiac ultrasound imaging catheters provided by the prior art, it can meet the imaging requirements of different angles. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the intracardiac ultrasound imaging system in the first embodiment.

[0018] Figure 2 This is a side sectional view of the intracardiac ultrasound imaging catheter in the first embodiment.

[0019] Figure 3This is a side sectional view of the catheter assembly in the first embodiment.

[0020] Figure 4 This is a schematic diagram of the assembly of the catheter assembly in the first embodiment.

[0021] Figure 5 for Figure 3 Cross-sectional view of position AA in the middle.

[0022] Figure 6 This is a side sectional view of the operating handle in the first embodiment.

[0023] Figure 7 This is a schematic diagram of the assembly of the operating handle in the first embodiment. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] In this instruction manual, the proximal end refers to the end closer to the operator during the procedure, and the distal end refers to the end further away from the operator during the procedure.

[0026] refer to Figure 1 , Figure 2 The first embodiment of this utility model provides an intracardiac ultrasound imaging system, including an intracardiac ultrasound imaging catheter 100, a rotation drive device 200 and an ultrasound imaging device 300, wherein the ultrasound imaging catheter 100 includes a catheter assembly 110 and an operating handle 120.

[0027] refer to Figures 3 to 5The catheter assembly 110 includes an inner sheath 111, a drive shaft 112, an ultrasonic transducer 113, an outer sheath 114, and at least one adjusting wire 115. The inner sheath 111 includes a proximal tube 111a and a distal tube 111b that are connected, with the distal tube 111b connected to the distal end of the proximal tube 111a and the distal end of the distal tube 111b being closed. The drive shaft 112 passes through the inner cavity of the proximal tube 111a, and the proximal end of the drive shaft 112 extends to the outside of the proximal tube 111a. The ultrasonic transducer 113 is fixedly connected to the drive shaft 112. The distal end of the inner sleeve 111 is inserted into the proximal end of the outer sleeve 114 and exits through the distal opening of the outer sleeve 114. The distal opening of the outer sleeve 114 is in close contact with the side wall between the proximal tube 111a and the distal tube 111b. The distal end of the bending wire 115 is connected to the distal end of the outer sleeve 114 and extends to the proximal end along the cavity formed between the outer wall of the inner sleeve 111 and the inner wall of the outer sleeve 114.

[0028] refer to Figure 6 , Figure 7 The operating handle 120 includes a handle housing 121, a transmission rod 122, a manual rotation assembly 123, and a bending knob 124. The handle housing 121 includes a first fixing part 121a, a second fixing part 121b, and a third fixing part 121c connected sequentially from the proximal end to the distal end. The first fixing part 121a is a sleeve structure with an opening at the proximal end, and the transmission rod 122 is movably inserted into the inner cavity of the first fixing part 121a from the proximal end. The second fixing part 121b is used to install the manual rotation assembly 123. The manual rotation assembly 123 includes a rotating knob 123a, a meshing transmission gear 123b, and a rotating gear 123c. The inner wall of the rotating knob 123a is provided with a gear that meshes with the transmission gear 123b. Wheel 123c is fixedly sleeved on the outside of drive shaft 112. Drive gear 123b is disposed between rotating gear 123c and rotating knob 123a. Rotating rotating knob 123a can drive drive shaft 112 and ultrasonic transducer 113 to rotate in inner sleeve 111 through drive gear 123b and rotating gear (123c) in sequence. Third fixing part 121c is used to install bending knob 124. The third fixing part 121c is provided with through hole. The proximal end of bending wire 115 passes through the through hole and is fixedly connected to bending knob 124. By rotating bending knob, the tension of bending wire 115 can be adjusted, thereby driving distal tube 111b and ultrasonic transducer 113 to deflect relative to proximal tube 111a through bending wire 115.

[0029] In this embodiment, the rotary drive device 200 includes a drive motor and a drive shaft connected to the transmission rod 122. The drive motor drives the transmission shaft 112 and the ultrasonic transducer 113 to rotate inside the inner sleeve 111 through the drive shaft and the transmission rod 122.

[0030] In this embodiment, the ultrasonic imaging device 300 is communicatively connected to the ultrasonic transducer 113 via the operating handle 120, and is used to control the ultrasonic transducer 113 to emit ultrasonic signals and receive reflected ultrasonic echo signals, and to obtain ultrasonic images based on the ultrasonic echo signals.

[0031] The intracardiac ultrasound imaging system provided in this embodiment can realize automatic rotation, manual rotation, and manual bending of the ultrasound transducer 113, so that the distal part of the intracardiac ultrasound imaging catheter can be adjusted at multiple angles after implantation in the human body. Compared with the intracardiac ultrasound imaging catheters provided by the prior art, it can meet the imaging requirements of different angles.

[0032] It should be noted that in this utility model, the number of bending wires can be 1 to 4. In this embodiment, there are 2 bending wires, which are arranged opposite to each other on both sides of the inner sleeve 111. By controlling the tension of the two bending wires 115 respectively, the distal tube 111b and the ultrasonic transducer 113 can be driven to deflect in opposite directions relative to the proximal tube 111a.

[0033] refer to Figure 4 Furthermore, the inner sleeve 111 has an outwardly protruding truncated cone 111c on its peripheral wall at the junction of the proximal tube 111a and the distal tube 111b. The radial dimension of the truncated cone 111c gradually decreases from the proximal end to the distal end. Specifically, the maximum radial dimension of the truncated cone 111c is smaller than the diameter of the outer sleeve 114 but larger than the distal opening size of the outer sleeve 114. When the inner sleeve 111 passes through the distal opening of the outer sleeve 114, the distal opening of the outer sleeve 114 tightly abuts against the outer wall of the truncated cone 111c, so that the inner sleeve 111 and the outer sleeve 114 are sealed together.

[0034] Furthermore, the catheter assembly also includes at least one sealing ring 116, which is made of at least one of the following materials: nitrile rubber, silicone rubber, polyurethane, etc. The outer wall of the frustum 111c has at least one circumferentially extending annular groove, the number of which is the same as the number of sealing rings 116, for securing and accommodating the sealing ring. By providing the sealing ring, the connection between the inner sheath 111 and the outer sheath 114 can be made tighter, thereby preventing blood from entering the cavity between the inner sheath 111 and the outer sheath 114 after the catheter assembly is implanted into the human body.

[0035] The second embodiment of this utility model also provides an intracardiac ultrasound imaging catheter, which differs from the first embodiment in that the catheter assembly of the intracardiac ultrasound imaging catheter provided in this embodiment does not include an outer sheath.

[0036] In this embodiment, the distal end of the bending wire is fixedly connected to the distal end of the inner sleeve, and the bending wire extends along the outer wall of the inner sleeve to connect with the operating handle.

[0037] The third embodiment of this utility model provides an intracardiac ultrasound imaging catheter. The difference between this embodiment and the first embodiment is that the operating handle of the intracardiac ultrasound imaging catheter does not include a manual rotation component.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An intracardiac ultrasound imaging catheter (100), characterized in that, The device includes a catheter assembly (110), which includes an inner cannula (111), a drive shaft (112), an ultrasonic transducer (113), and at least one bending wire (115). The inner cannula (111) includes a proximal tube (111a) and a distal tube (111b) that are connected, with the distal end of the distal tube (111b) closed. The drive shaft (112) passes through the inner cavity of the proximal tube (111a), and the ultrasonic transducer (113) is fixedly connected to the distal end of the drive shaft (112) and passes through the inner cavity of the distal tube (111b). The distal end of the bending wire (115) is connected to the distal end of the inner cannula (111), and the bending wire (115) extends along the outer wall of the inner cannula (111) to the proximal end. Driving the transmission shaft (112) can cause the ultrasonic transducer (113) to rotate in the inner cavity of the inner sleeve (111). By controlling the bending wire (115), the distal tube (111b) and the ultrasonic transducer (113) can be deflected relative to the proximal tube (111a).

2. The intracardiac ultrasound imaging catheter according to claim 1, characterized in that, There are two bending wires (115), which are arranged opposite to each other on the side of the inner sleeve (111). By controlling the tension of the two bending wires (115), the distal tube (111b) and the ultrasonic transducer (113) can be deflected in opposite directions relative to the proximal tube (111a).

3. The intracardiac ultrasound imaging catheter (100) according to claim 1, characterized in that, The catheter assembly (110) further includes an outer cannula (114) with a distal opening diameter smaller than its inner diameter; the distal end of an inner cannula (111) enters from the proximal end of the outer cannula (114) and exits from the distal opening of the outer cannula (114); the outer wall of the inner cannula (111) is in close contact with the distal opening of the outer cannula (114); the distal end of a bending wire (115) is connected to the distal end of the outer cannula (114), and the bending wire (115) extends to the proximal end along the cavity formed between the outer wall of the inner cannula (111) and the inner wall of the outer cannula (114).

4. The intracardiac ultrasound imaging catheter according to claim 3, characterized in that, The outer wall of the inner sleeve (111) is provided with an outwardly protruding truncated cone (111c). The truncated cone (111c) is located at the connection between the proximal tube (111a) and the distal tube (111b). The radial dimension of the truncated cone (111c) gradually decreases from the proximal end to the distal end. When the inner sleeve (111) passes through the distal opening of the outer sleeve (114), the distal port of the outer sleeve (114) closely abuts against the outer wall of the truncated cone (111c).

5. The intracardiac ultrasound imaging catheter according to claim 4, characterized in that, The conduit assembly (110) further includes at least one sealing ring (116), and the outer wall of the truncated cone (111c) is provided with at least one circumferentially extending annular groove, the number of which is the same as the number of the sealing rings (116), for receiving the sealing rings (116).

6. The intracardiac ultrasound imaging catheter according to claim 1, characterized in that, The ultrasound imaging catheter also includes an operating handle (120), which includes a handle housing (121), a transmission rod (122), and a bending knob (124). The transmission rod (122) is movably installed inside the handle housing (121). The bending knob (124) has a sleeve-like structure and is movably sleeved on the distal end of the handle housing (121). The proximal end of the catheter assembly (110) is connected to the operating handle (120), and the distal end of the bending wire (115) is fixedly connected to the bending knob. The tension of the bending wire (115) can be adjusted by rotating the bending knob, thereby driving the distal tube (111b) and the ultrasonic transducer (113) to deflect relative to the proximal tube (111a) through the bending wire (115). The proximal end of the drive shaft (112) passes through the proximal end of the inner sleeve (111) and is connected to the drive rod (122). By driving the drive rod (122), the drive shaft (112) and the ultrasonic transducer (113) can be driven to rotate in the inner sleeve (111).

7. The intracardiac ultrasound imaging catheter according to claim 6, characterized in that, The operating handle also includes a manual rotation component (123), which includes a rotary knob (123a). The rotary knob (123a) has a sleeve-like structure and is coaxially sleeved on the proximal end of the bending knob. The drive shaft (112) is connected to the rotary knob (123a). By rotating the rotary knob (123a), the drive shaft (112) and the ultrasonic transducer (113) can be driven to rotate in the inner sleeve (111).

8. The intracardiac ultrasound imaging catheter according to claim 7, characterized in that, The handle housing (121) includes a first fixing part (121a), a second fixing part (121b) and a third fixing part (121c) connected sequentially from the proximal end to the distal end. The first fixing part (121a) is a sleeve structure with an opening at the proximal end, and the transmission rod (122) is movably inserted into the inner cavity of the first fixing part (121a) from the proximal end; The second fixing part (121b) is used to install the manual rotating assembly (123). The manual rotating assembly (123) also includes a transmission gear (123b) and a rotating gear (123c) that mesh with each other. The inner wall of the rotating knob (123a) is provided with a gear that meshes with the transmission gear (123b). The rotating gear (123c) is fixedly sleeved on the outside of the transmission shaft (112). The transmission gear (123b) is disposed between the rotating gear (123c) and the rotating knob (123a). Rotating the rotating knob (123a) can drive the transmission shaft (112) and the ultrasonic transducer (113) to rotate in the inner sleeve (111) in sequence through the transmission gear (123b) and the rotating gear (123c). The third fixing part (121c) is used to install the bending knob (124). The third fixing part (121c) is provided with a through hole. The proximal end of the bending wire (115) passes through the through hole and is fixedly connected to the bending knob (124).

9. An intracardiac ultrasound imaging system, characterized in that, The device includes the intracardiac ultrasound imaging catheter (100) according to any one of claims 1-8 and a rotary drive device (200), the rotary drive device (200) including a drive motor and a drive shaft connected to the transmission rod (122), the drive motor driving the transmission shaft (112) and the ultrasound transducer (113) to rotate inside the inner tube (111) through the drive shaft and the transmission rod (122).

10. The intracardiac ultrasound imaging system according to claim 9, characterized in that, The intracardiac ultrasound imaging system also includes an ultrasound imaging device (300), which is connected to the ultrasound transducer (113) via the operating handle (120) to control the ultrasound transducer (113) to emit ultrasound signals and receive reflected ultrasound echo signals, and to obtain ultrasound images based on the ultrasound echo signals.

Images