Angiography instrument and angiography system

Abstract

The utility model provides a radiography instrument and a radiography system. The radiography instrument is suitable for conducting radiography on a natural orifice and comprises a main pipe, a pressurizing channel is formed in the side wall of the main pipe, and the pressurizing channel is provided with a pressure inlet close to the near end of the main pipe and a pressure outlet located in the outer surface of the side wall and close to the far end of the main pipe; the main tube is arranged on the radiography tube in a sleeving manner, and the radiography tube extends from the near end of the main tube to the far end of the main tube; the balloon is arranged near the far end of the main tube in a sealing and sleeving mode and covers the pressure outlet, the contrast agent supply device provides contrast agents for the natural orifice through the contrast tube, and the pressurizing device pressurizes the balloon through the pressure inlet so that the balloon can be expanded to abut against the natural orifice. Contrast media flowing out of the far end of the radiography tube are prevented from flowing to the side, away from the far end of the radiography tube, of the balloon along the outer surface of the radiography instrument.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, and in particular to an imaging device and an imaging system suitable for imaging natural cavities. Background Art

[0002] Natural cavities include the stomach, vagina, urethra, cystic duct, colorectum, and esophagus. When treating obstructive lesions in natural cavities, it is necessary to perform angiography on the natural cavities to observe the lesions. However, when treating obstructive lesions in certain natural cavities, for example, in endoscopic retrograde pancreaticobiliary ERCP surgery, it is difficult to use contrast agents directly for imaging, and it is necessary to use an imaging catheter to assist in the delivery of contrast agents or to use an ultrasonic device for imaging. However, the cost of using an ultrasonic device for imaging is relatively high. In the related technologies for assisting the delivery of contrast agents for imaging, the contrast agent loss may occur, which may damage the patient's body. Summary of the invention

[0003] In order to at least partially overcome the technical defects of at least one or other inventions mentioned above, at least one embodiment of the present invention provides an angiography device and angiography system, which can prevent the loss of contrast agent and avoid damage to the patient's body.

[0004] In view of this, an embodiment of the utility model provides an angiography device, which is suitable for angiography of natural cavities, and the angiography device includes: a main tube, a pressurizing channel is formed in the side wall of the main tube, the pressurizing channel has a pressure inlet adjacent to the proximal end of the main tube and a pressure outlet located on the outer surface of the side wall and adjacent to the distal end of the main tube; an angiography tube, the main tube is sleeved on the angiography tube, and the angiography tube extends from the proximal end of the main tube to the distal end of the main tube; and a balloon, which is sealingly sleeved near the distal end of the main tube and covers the pressure outlet, a contrast agent supply device provides contrast agent to the natural cavity through the angiography tube, and a pressurizing device pressurizes the balloon through the pressure inlet, so that the balloon expands to abut against the natural cavity, so as to prevent the contrast agent flowing out from the distal end of the angiography tube from flowing along the outer surface of the angiography device to the side of the balloon away from the distal end of the angiography tube.

[0005] Optionally, the angiography tube is constructed to be sleeved on a guide wire, and the distal end enters the natural cavity through the guide wire.

[0006] Optionally, the angiography instrument further includes: an operating part, including: an operating body, sealed and coupled to the proximal end of the main tube; and a locking assembly, arranged on a side of the operating body away from the main tube, the guide wire extending through the locking assembly to the outside of the angiography instrument, and the locking assembly is configured to lock the guide wire to prevent the contrast agent from flowing out of the angiography instrument along the guide wire.

[0007] Optionally, the locking assembly includes: a screw cap configured to cooperate with the operating body to form a accommodating space; and an elastic member disposed in the accommodating space, the guide wire extending through the elastic member to the outside of the imaging device, and the screw cap is rotated to move closer to or away from the operating body to compress or decompress the elastic member, thereby locking or releasing the guide wire.

[0008] Optionally, the elastic member includes a cross hole, and the guide wire passes through the cross hole and extends to the outside of the imaging device. When the screw cap is close to the operating body, the cross hole is deformed to lock the guide wire.

[0009] Optionally, the locking assembly further includes: a gasket, which is arranged between the elastic member and the screw cap, and a boss is formed on the gasket, and the boss cooperates with the groove of the elastic member to fix the elastic member.

[0010] Optionally, the operating body includes: an angiography interface, which is connected to the angiography tube and is configured to be connected to an external contrast agent supply device; and a pressurization interface, which is connected to the pressurization channel at the pressure inlet and is configured to be connected to an external pressurization device.

[0011] Optionally, a glue injection port is provided between the main pipe and the operating body, and the operating body is connected to the main pipe by filling the glue injection port with glue.

[0012] Optionally, the balloon is configured in a cone shape surrounding the main tube.

[0013] An embodiment of the utility model also provides an angiography system, comprising: a guide wire; an angiography device as shown above, which is sleeved on the guide wire and slides along the guide wire to a natural cavity that requires angiography, and the angiography device is configured to deliver a contrast agent to the natural cavity; and a camera device, which, after the contrast agent is filled into the natural cavity, photographs the natural cavity to obtain an angiography image of the natural cavity.

[0014] According to an embodiment of the utility model, a pressurized channel having a pressure inlet and a pressure outlet is provided on the main tube of the radiographic instrument, and a balloon is sealedly sleeved near the distal end of the main tube. The balloon covers the pressure outlet. After the distal end of the main tube and the balloon enter the natural cavity that needs radiography, the balloon can be pressurized through the pressurized channel to expand the balloon until it abuts against the natural cavity. Even if the balloon and the natural cavity are in a sealed state, the contrast agent can be prevented from flowing from the distal end of the radiographic tube along the outer surface of the radiographic instrument to the side of the balloon away from the distal end of the radiographic tube, thereby avoiding the loss of the contrast agent. In addition, by providing the pressurized channel on the side wall of the main tube and sleeved the main tube on the radiographic tube, the miniaturization of the radiographic instrument can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a stereoscopic diagram of an angiography device provided by an illustrative embodiment of the utility model.

[0016] Figure 2 It is a partial enlarged view of the main pipe provided by the exemplary embodiment of the utility model.

[0017] Figure 3 It is a stereoscopic view of the distal end of a main tube provided by an exemplary embodiment of the utility model, wherein an operating portion is shown.

[0018] Figure 4 It is a cross-sectional view of the balloon provided by the exemplary embodiment of the utility model after entering the natural cavity.

[0019] Figure 5 It is a stereoscopic diagram of an imaging device provided by another exemplary embodiment of the utility model.

[0020] Figure 6 yes Figure 5 Exploded view of the illustrated embodiment. Figure 7 It is a stereoscopic diagram of a screw cap provided by an exemplary embodiment of the utility model.

[0021] Figure 8 It is a three-dimensional diagram of an elastic member provided by an exemplary embodiment of the utility model.

[0022] Fig. 9 It is a three-dimensional diagram of a gasket provided in an exemplary embodiment of the utility model.

[0023] Fig.10 It is a partial diagram of an operating body provided by an illustrative embodiment of the utility model.

[0024] In the above drawings, the meanings of the reference numerals are as follows:

[0025] 1. Supervisor;

[0026] 11. Pressurized channel;

[0027] 111, pressure inlet;

[0028] 112, pressure outlet;

[0029] 2. Angiography tube;

[0030] 3. Balloon;

[0031] 4. Operation department;

[0032] 41. Operation subject;

[0033] 411, angiography interface;

[0034] 412, pressurized interface;

[0035] 42. Locking assembly;

[0036] 421, screw cap;

[0037] 422, elastic member;

[0038] 4221, cross hole;

[0039] 4222, groove;

[0040] 423, gasket;

[0041] 4231, boss;

[0042] 5. Glue injection port;

[0043] 6. Natural cavity;

[0044] 7. Blockage. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0046] However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, the description of the known technology is omitted to avoid unnecessary confusion of the concept of the present invention.

[0047] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The term "comprising" used herein indicates the existence of features, steps, operations, but does not exclude the existence or addition of one or more other features.

[0048] In the case of using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.). In the case of using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, or C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0049] Figure 1 It is a stereoscopic diagram of an angiography device provided by an illustrative embodiment of the utility model. Figure 2 It is a partial enlarged view of the main pipe provided by the exemplary embodiment of the utility model. Figure 3 It is a stereoscopic view of the distal end of a main tube provided by an exemplary embodiment of the utility model, wherein an operating portion is shown. Figure 4 It is a cross-sectional view of the balloon provided by the exemplary embodiment of the utility model after entering the natural cavity.

[0050] like Figures 1 to 4 As shown, an embodiment of the utility model provides an angiography device. The angiography device can be used to perform angiography on a natural cavity 6 that needs to be angiography. The angiography device can include a main tube 1, an angiography tube 2 and a balloon 3.

[0051] like Figure 2 and Figure 3 As shown, a pressurized channel 11 may be formed in the side wall of the main pipe 1. The pressurized channel 11 may have a pressure inlet 111 and a pressure outlet 112. The pressure inlet 111 may be located on the outer surface of the side wall and adjacent to the proximal end of the main pipe 1 (e.g., Figure 1 The pressure outlet 112 may be located on the outer surface of the side wall and adjacent to the distal end of the main pipe 1 (eg, Figure 1 The main tube 1 can be sleeved on the angiography tube 2. The angiography tube 2 can extend from the proximal end of the main tube 1 to the distal end of the main tube 1 (as shown in FIG. Figure 1 The balloon 3 can be sealed and sleeved near the distal end of the main tube 1 and cover the pressure outlet 112. Since the main tube 1 and the angiography tube 2 are relatively long, it should be understood that Figure 1The truncated portion includes the omitted main tube 1 and the contrast tube 2. The diameter of the liquid outlet of the contrast tube 2 can be smaller than the diameter of the distal end of the main tube 1. A tip can be installed on the side of the distal end of the main tube 1 away from the contrast tube 2. In the case where there is a blockage 7 in the natural cavity 6, the tip can be used to pass through the blockage so that the distal end of the main tube 1 can smoothly enter the natural cavity 6 that needs to be imaged, such as the common bile duct. The main tube 1 can be provided with a metal braided wire that can withstand higher pressure, so that the main tube 1 will not be deformed when the balloon 3 is expanded and the contrast tube 2 delivers the contrast agent. The tip, the main tube 1 and the balloon 3 can be assembled together by a laser welding process.

[0052] After the distal end enters the natural cavity 6, the external contrast agent supply device can provide contrast agent to the natural cavity 6 through the pressure inlet 111. The external pressurizing device pressurizes the balloon 3 through the pressurizing channel 11, so that the balloon 3 can be expanded to abut against the natural cavity 6 (such as Figure 4 As shown), to prevent the contrast agent flowing out from the distal end of the contrast tube 2 from flowing along the outer surface of the contrast instrument to the side of the balloon 3 away from the distal end of the contrast tube 2 (as shown in FIG. Figure 1 The pressurizing device may be a pressure pump.

[0053] According to the embodiment of the utility model, a pressurizing channel 11 having a pressure inlet 111 and a pressure outlet 112 is provided on the main tube 1 of the radiographic instrument, and a balloon 3 is sealedly sleeved near the distal end of the main tube 1. The balloon 3 covers the pressure outlet 112. After the distal end of the main tube 1 and the balloon 3 enter the natural cavity 6 that needs radiography, the balloon 3 can be pressurized through the pressurizing channel 11 to expand the balloon 3 until it abuts against the natural cavity 6. Even if the balloon 3 and the natural cavity 6 are in a sealed state, it can be prevented that the contrast agent flows from the distal end of the radiographic tube 2 along the outer surface of the radiographic instrument to the side of the balloon 3 away from the distal end of the radiographic tube 2 (such as Figure 1 The pressure channel 11 is arranged on the side wall of the main tube 1, and the main tube 1 is sleeved on the contrast tube 2, so that the contrast device can be miniaturized.

[0054] In some embodiments, one pressurizing channel 11 may be provided in the side wall of the main tube 1, and one pressure outlet 112 may be provided near the distal end of the main tube 1. In some alternative embodiments, two, three or more pressurizing channels 11 may be provided in the side wall of the main tube 1, and two, three or more pressure outlets 112 may be provided near the distal end of the main tube 1, so that the balloon is evenly inflated, and these pressurizing channels 11 may share one pressure inlet 111.

[0055] In some embodiments, the angiography tube 2 is configured to be sleeved on a guide wire, and the distal end passes through the guide wire to enter the natural cavity 6. By setting the guide wire, the tip can be prevented from damaging the side wall of the natural cavity 6, and it is beneficial for the distal end of the angiography tube 2 to accurately and quickly enter the natural cavity 6 that needs angiography.

[0056] Figure 5 It is a stereoscopic diagram of an imaging device provided by another exemplary embodiment of the utility model.

[0057] like Figures 1 to 5 As shown, in some embodiments, the imaging device may further include an operating unit 4. The operating unit 4 may include an operating body 41 and a locking assembly 42. The operating body 41 may be sealed and coupled to the proximal end of the main tube 1 (eg, Figure 5 The locking assembly 42 may be disposed on a side of the operating body 41 away from the main pipe 1 (eg, Figure 5 The guide wire can pass through the locking assembly 42 and extend to the outside of the imaging device (such as by Figure 5 The right side of the angiography device shown in the figure extends from right to left). The locking assembly 42 can be configured to lock the guide wire, that is, the locking assembly 42 and the guide wire are in a sealed state, which can prevent the contrast agent from flowing out of the angiography device along the guide wire. The locking assembly 42 can prevent the operating part 4 from sliding further relative to the guide wire, so that the position of the angiography device in the natural cavity 6 can be accurately controlled.

[0058] Figure 6 yes Figure 5 Exploded view of the illustrated embodiment. Figure 7 It is a three-dimensional diagram of a screw cap 421 provided in an exemplary embodiment of the present invention.

[0059] like Figures 5 to 7 As shown, in some embodiments, the locking assembly 42 includes a screw cap 421 and an elastic member 422. The screw cap 421 can cooperate with the operating body 41 to form a receiving space. The elastic member 422 can be arranged in the receiving space. The guide wire can pass through the elastic member 422 and extend to the outside of the radiographic device. For example, the tip of the radiographic device, the left end of the radiographic tube 2 (such as Figure 6 The left end shown), the right end of the contrast tube 2 (as shown Figure 6The guide wire is locked or released by rotating the screw cap 421. Specifically, the screw cap 421 can be rotated to make the screw cap 421 close to or away from the operating body 41 to compress or decompress the elastic member 422, thereby locking or releasing the guide wire. Specifically, the screw cap 421 can be rotated to make the screw cap 421 close to the operating body 41 to compress the elastic member 422, thereby locking the guide wire. The screw cap 421 can be rotated to make the screw cap 421 away from the operating body 41 to decompress the elastic member 422, thereby releasing the guide wire. The screw cap 421 and the operating body 41 can be snap-fitted.

[0060] Figure 8 It is a three-dimensional diagram of the elastic member 422 provided in the exemplary embodiment of the present invention.

[0061] like Figure 5 and Figure 8 As shown, in some embodiments, the elastic member 422 may include a cross hole 4221. The guide wire extends to the outside of the radiographic instrument through the cross hole 4221. When the screw cap 421 is close to the operating body 41, the cross hole 4221 is deformed to lock the guide wire, that is, the elastic member 422 and the guide wire are in a sealed state, which can prevent the contrast agent from flowing out of the radiographic instrument along the guide wire. In addition, the elastic member 422 can prevent the operating part 4 from sliding further relative to the guide wire, so that the position of the radiographic instrument in the natural cavity 6 can be accurately controlled.

[0062] Fig. 9 It is a three-dimensional diagram of a gasket 423 provided in an exemplary embodiment of the present invention.

[0063] like Figures 5 to 9 As shown, in some embodiments, the locking assembly 42 may further include a gasket 423. The gasket 423 may be disposed between the elastic member 422 and the screw cap 421. A boss 4231 may be formed on the gasket 423, and the boss 4231 cooperates with the groove 4222 of the elastic member 422 to fix the elastic member 422 and prevent the elastic member 422 from moving in the accommodation space, thereby preventing the guide wire from driving the radiographic device to shake after locking the guide wire, and improving the accuracy of radiography. The gasket 423 may be made of a hard material, which may be transmitted to the elastic member 422 by squeezing the gasket 423, thereby better achieving the locked state of the elastic member 422 and the guide wire.

[0064] Fig.10 It is a partial diagram of the operating body 41 provided in the exemplary embodiment of the present utility model.

[0065] like Figure 6 and Fig.10As shown, in some embodiments, the operating body 41 may include an angiography interface 411 and a pressurization interface 412. The angiography interface 411 and the pressurization interface 412 may form an angle with the angiography tube 2 and the main tube 1, respectively. One end of the angiography interface 411 may be connected to the angiography tube 2. The other end of the angiography interface 411 may be used to connect to an external contrast agent supply device. The contrast agent supply device may provide contrast agent to the angiography tube 2 through the angiography interface 411, thereby providing contrast agent to the natural cavity 6 that requires angiography. One end of the pressurization interface 412 may be connected to the pressurization channel 11 at the pressure inlet 111. The other end of the pressurization interface 412 may be used to connect to an external pressurization device. The pressurization device may provide pressure to the pressurization channel 11 through the pressurization interface 412, thereby causing the balloon 3 to expand to abut against the natural cavity 6 to prevent the balloon 3 from entering from the distal end (such as the distal end) of the angiography tube 2. Figure 6 The contrast agent flowing out of the left end of the angiography tube 2 shown in the figure flows along the outer surface of the angiography instrument to the side of the balloon 3 away from the distal end of the angiography tube 2.

[0066] Furthermore, a contrast input tube may be provided in the contrast interface 411. One end of the contrast input tube may be connected to the contrast tube 2. The other end of the contrast input tube may be used to connect to an external contrast agent supply device. The contrast agent supply device may provide contrast agent to the contrast tube 2 through the contrast input tube, thereby providing contrast agent to the natural cavity 6 that requires contrast. The contrast input tube may form an angle with the contrast tube 2. By fixing the contrast input tube to the contrast interface 411, the contrast tube 2 may be fixed to the operating body 41 to prevent the contrast tube 2 from shaking in the main tube 1 and the operating body 41.

[0067] like Figure 3 As shown, in some embodiments, a glue injection port 5 is provided between the main tube 1 and the operating body 41. The operating body 41 can be connected to the main tube 1 by filling the glue injection port 5 with glue, so that the main tube 1 can be prevented from moving relative to the operating body 41. Further, by locking the guide wire by the elastic member 422, the locking assembly 42 can be prevented from sliding relative to the guide wire. By setting the locking assembly 42 to cooperate with the operating body 41, the operating body 41 can be prevented from sliding relative to the guide wire. By setting the glue injection port 5, the operating body 41 and the main tube 1 are kept stationary, so that the main tube 1 can be prevented from sliding relative to the guide wire, and then the elastic member 422 can be provided to prevent the radiographic device from sliding relative to the guide wire. The glue can be a supporting glue, such as UV glue. By providing the glue, the operating body 41 and the main tube 1 can be separated, the operating body 41 can be prevented from squeezing the main tube 1, and a better sealing effect can be achieved between the operating body 41 and the main tube 1.

[0068] In some embodiments, the balloon 3 may be configured in an elliptical shape surrounding the main tube 1. Preferably, the balloon 3 may be configured in a conical shape surrounding the main tube 1, which may better match the shape of a natural cavity 6 having an obstruction.

[0069] The embodiment of the utility model also provides a radiography system. The radiography system may include a guide wire, a radiography instrument as shown above, and a camera. The radiography instrument may be sleeved on the guide wire and may slide along the guide wire to the natural cavity 6 to be radiographed. The radiography instrument may be used to deliver a contrast agent to the natural cavity 6. After the contrast agent is filled in the natural cavity 6, the camera may be used to photograph the natural cavity 6 to obtain a radiography image of the natural cavity 6.

[0070] Specifically, taking the natural cavity 6 to be imaged as a bile duct, the pressurizing device as a pressure pump, and the contrast agent supply device as a ring-handled syringe as an example, the working process of the imaging system can be as follows:

[0071] The radiographic instrument is sheathed on the guide wire and slid along the guide wire. After the balloon 3 enters the entrance of the bile duct, a pressure pump is used to deliver physiological saline to the balloon 3 through the pressurized channel 11 to expand the balloon 3. When the balloon 3 expands to abut against the wall of the bile duct, the entrance of the bile duct can be blocked. The pressure of the pressure pump is kept constant. The screw cap 421 is screwed to lock the guide wire, so that the locking component 42 and the guide wire form a closed state. A ring-handled syringe is used to deliver a contrast agent to the bile duct through the radiographic tube 2. After the bile duct is filled with the contrast agent, the bile duct is photographed using a camera to obtain a radiographic image of the bile duct. After the imaging is completed, the contrast fluid in the bile duct is extracted using a ring-handled syringe to prevent the contrast agent from flowing into the human body. After the balloon 3 is depressurized, the screw cap 421 is screwed to release the guide wire, and the radiographic instrument is withdrawn along the guide wire.

[0072] A pressurized channel 11 having a pressure inlet 111 and a pressure outlet 112 is provided on the main tube 1 of the radiographic device, and a balloon 3 is sealedly sleeved near the distal end of the main tube 1. The balloon 3 covers the pressure outlet 112. After the distal end of the main tube 1 and the balloon 3 enter the natural cavity 6 where radiography is required, the balloon 3 can be pressurized through the pressurized channel 11, so that the balloon 3 expands to abut against the natural cavity 6. Even if the balloon 3 and the natural cavity 6 are in a sealed state, the contrast agent can be prevented from flowing from the distal end of the radiographic tube 2 along the outer surface of the radiographic device to the side of the balloon 3 away from the distal end of the radiographic tube 2, thereby avoiding the loss of the contrast agent. In addition, by providing the pressurized channel 11 on the side wall of the main tube 1 and sleeved on the radiographic tube 2, the radiographic device can be miniaturized.

[0073] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

[0074] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An imaging device, characterized in that: Suitable for imaging of natural cavities, the imaging device comprises: A main pipe, a pressurized channel is formed in a side wall of the main pipe, the pressurized channel has a pressure inlet adjacent to a proximal end of the main pipe and a pressure outlet located on an outer surface of the side wall and adjacent to a distal end of the main pipe; an angiography tube, the main tube is sleeved on the angiography tube, and the angiography tube extends from the proximal end of the main tube to the distal end of the main tube; and A balloon is sealingly sleeved near the distal end of the main tube and covers the pressure outlet. A contrast agent supply device supplies contrast agent to the natural cavity through the contrast tube. A pressurizing device pressurizes the balloon through the pressure inlet, so that the balloon expands to abut against the natural cavity, so as to prevent the contrast agent flowing out from the distal end of the contrast tube from flowing along the outer surface of the contrast instrument to the side of the balloon away from the distal end of the contrast tube.

2. The imaging device according to claim 1, characterized in that: The angiography tube is constructed to be sleeved on a guide wire, and the distal end enters the natural cavity through the guide wire.

3. The imaging device according to claim 2, characterized in that: The imaging device also includes: Operation section, including: an operating body, sealingly coupled to the proximal end of the main tube; and The locking assembly is arranged on a side of the operating body away from the main pipe. The guide wire passes through the locking assembly and extends to the outside of the imaging device. The locking assembly is configured to lock the guide wire to prevent the contrast agent from flowing out of the imaging device along the guide wire.

4. The imaging device according to claim 3, characterized in that: The locking assembly comprises: A screw cap configured to cooperate with the operating body to form a receiving space; and An elastic member is arranged in the accommodating space, and the guide wire passes through the elastic member and extends to the outside of the angiographic device. The screw cap is rotated to make the screw cap approach or move away from the operating body to compress or decompress the elastic member, thereby locking or releasing the guide wire.

5. The imaging device according to claim 4, characterized in that: The elastic member comprises a cross hole, and the guide wire passes through the cross hole and extends to the outside of the radiographic instrument. When the screw cap is close to the operating body, the cross hole is deformed to lock the guide wire.

6. The imaging device according to claim 4 or 5, characterized in that: The locking assembly also includes: A gasket is arranged between the elastic member and the screw cap. A boss is formed on the gasket. The boss cooperates with the groove of the elastic member to fix the elastic member.

7. The imaging device according to claim 4 or 5, characterized in that: The operating entities include: a contrast agent interface, connected to the contrast agent tube, and configured to be connected to an external contrast agent supply device; and A pressurizing interface is communicated with the pressurizing channel at the pressure inlet, and the pressurizing interface is configured to be connected to an external pressurizing device.

8. The imaging device according to claim 3, 4 or 5, characterized in that: A glue injection port is provided between the main pipe and the operating body, and the operating body is connected to the main pipe by filling the glue injection port with glue.

9. The imaging device according to any one of claims 1 to 5, characterized in that: The balloon is configured in a cone shape surrounding the main tube.

10. An imaging system, characterized in that: include: Guidewire; The angiography device according to any one of claims 1 to 9, which is sleeved on the guide wire and slides along the guide wire to a natural cavity that needs to be imaged, and the angiography device is configured to deliver a contrast agent to the natural cavity; as well as The imaging device is used to image the natural cavity after the contrast agent is filled in the natural cavity to obtain a contrast image of the natural cavity.

Images