CN116850433B - Contrast catheter and contrast system - Google Patents
Contrast catheter and contrast system Download PDFInfo
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- CN116850433B CN116850433B CN202311099809.XA CN202311099809A CN116850433B CN 116850433 B CN116850433 B CN 116850433B CN 202311099809 A CN202311099809 A CN 202311099809A CN 116850433 B CN116850433 B CN 116850433B
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- 239000002872 contrast media Substances 0.000 claims abstract description 81
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 238000002347 injection Methods 0.000 claims abstract description 27
- 239000007924 injection Substances 0.000 claims abstract description 27
- 230000004087 circulation Effects 0.000 claims abstract description 25
- 238000002601 radiography Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 71
- 239000000523 sample Substances 0.000 claims description 38
- 210000004204 blood vessel Anatomy 0.000 claims description 25
- 230000036772 blood pressure Effects 0.000 claims description 11
- 230000017531 blood circulation Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 claims 3
- 239000008280 blood Substances 0.000 description 14
- 210000004369 blood Anatomy 0.000 description 14
- 230000000694 effects Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 206010002329 Aneurysm Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
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- 239000010408 film Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
- A61B5/02158—Measuring pressure in heart or blood vessels by means inserted into the body provided with two or more sensor elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6852—Catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M31/00—Devices for introducing or retaining media, e.g. remedies, in cavities of the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/007—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests for contrast media
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M2025/0001—Catheters; Hollow probes for pressure measurement
- A61M2025/0002—Catheters; Hollow probes for pressure measurement with a pressure sensor at the distal end
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
- A61M2025/0037—Multi-lumen catheters with stationary elements characterized by lumina being arranged side-by-side
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M2025/0057—Catheters delivering medicament other than through a conventional lumen, e.g. porous walls or hydrogel coatings
Abstract
The application provides a radiography catheter and a radiography system, and relates to the technical field of medical supplies. The radiography catheter comprises a main body, wherein a first channel and a second channel are arranged in the main body; the first channel is used for the guide wire to pass through, and the second channel is used for delivering contrast agent; the second channel comprises a first circulating pipeline, a buffer cavity and a second circulating pipeline which are sequentially communicated; one end of the first circulating pipeline is used for allowing contrast medium to flow in, and the other end of the first circulating pipeline is communicated with the buffer cavity; one end of the second circulating pipeline is communicated with the buffer cavity, and the other end of the second circulating pipeline is a closed end; the inner diameter of the first circulation pipeline is smaller than that of the second circulation pipeline; the buffer cavity is used for slowing down the flow rate of the contrast agent; the side wall of the main body is provided with a liquid outlet hole which is communicated with the second flow pipeline. The contrast catheter is provided with a plurality of channels, and the injection of contrast agent and the guiding of a guide wire can be respectively carried out in the independent channels, so that the mutual influence of the contrast agent and the guide wire is avoided; in addition, the second flow line may stabilize the flow rate of the contrast agent.
Description
Technical Field
The application relates to the technical field of medical supplies, in particular to a radiography catheter and a radiography system.
Background
The radiography catheter is widely applied to diseases such as blood vessels as an interventional medical tool. In performing the relevant operation, a tiny incision is made in the patient's body surface, and then a contrast catheter is introduced through the incision to construct the passageway required for the relevant medical procedure.
At present, most of the contrast catheters used in the hospital are single-channel catheters, and injection of contrast agents and guiding of guide wires share the same channel, wherein the guide wires need to be withdrawn before contrast agent injection, the operation is complex, and the residual contrast agents in the channel can cause obstruction to the inlet and outlet of the guide wires due to certain viscosity of the contrast agents.
In addition, the conventional contrast catheter has a problem that the flow rate of the contrast medium is unstable when the contrast medium is injected. The faster the flow rate of the contrast agent, the greater the amount of contrast agent flowing into the blood vessel per unit time, which increases the pressure in the blood vessel, possibly leading to rupture of the aneurysm, etc.
Disclosure of Invention
The application aims to overcome the defects of the prior art and provides a radiography catheter and a radiography system, which are used for solving the problems in the prior art.
To solve the above problems, a first aspect of an embodiment of the present application provides a radiography catheter, including a main body, in which a first channel and a second channel are disposed; wherein the first channel is used for the guide wire to pass through, the second channel is used for conveying contrast medium, and the first channel is not communicated with the second channel;
the second channel comprises a first circulation pipeline, a buffer cavity and a second circulation pipeline which are sequentially communicated; one end of the first circulating pipeline is used for flowing in the contrast agent, and the other end of the first circulating pipeline is communicated with the buffer cavity; one end of the second circulating pipeline is communicated with the buffer cavity, and the other end of the second circulating pipeline is a closed end; the inner diameter of the first circulation pipeline is smaller than that of the second circulation pipeline; the buffer cavity is used for slowing down the flow rate of the contrast agent;
the side wall of the main body is provided with a liquid outlet hole which is communicated with the second flow pipeline.
In one possible embodiment, the buffer chamber is spherical, in which a spherical body is arranged, wherein the diameter of the spherical body is smaller than the inner diameter of the buffer chamber;
the inner diameters of the first circulation pipeline and the second circulation pipeline are smaller than the diameter of the spherical body; the inner wall of the second circulation pipeline is provided with a groove for the circulation of contrast medium, and the groove is always communicated with the buffer cavity.
In a possible embodiment, the liquid outlet hole comprises a first end and a second end which are separated at two ends, the first end is directly communicated with the second flow pipeline, and the second end is inclined towards the side where the closed end is located.
In one possible implementation manner, a first pressure detection module and a second pressure detection module are arranged on the main body, and the first pressure detection module and the second pressure detection module are used for detecting blood pressure in a blood vessel;
the first pressure detection module comprises a first probe for sensing blood pressure, and the second pressure detection module comprises a second probe for sensing blood pressure; the first probe and the second probe are both fixed on the side wall of the main body;
the first probe and the second probe are sequentially arranged along the length of the main body and are respectively arranged at two sides of the liquid outlet hole.
In one possible embodiment, the distance between the first probe and the second probe is not smaller than the length of the second flow line.
In one possible embodiment, the first pressure detection module comprises a fiber optic pressure sensor or a membrane pressure sensor;
the second pressure detection module comprises an optical fiber pressure sensor or a film pressure sensor.
In one possible embodiment, a conical surface is provided between the first flow line and the buffer chamber.
In a possible embodiment, the cross section of the outlet opening is oval.
In one possible embodiment, the inner wall of the second flow line is elastic.
A second aspect of an embodiment of the present application provides a contrast system comprising a syringe pump, a control module and a contrast catheter as described above, wherein the syringe pump is adapted to power the flow of contrast agent within the contrast catheter;
a first pressure detection module and a second pressure detection module are arranged on the main body of the radiography catheter, and the first pressure detection module, the second pressure detection module and the injection pump are electrically connected with the control module;
the first pressure detection module and the second pressure detection module are respectively used for detecting the pressure at two sides of the liquid outlet hole on the side wall of the main body along the blood flow direction in real time;
the control module is used for sending a first control signal to the injection pump to adjust the injection pressure of the injection pump when the absolute value of the difference between the pressure values measured by the first pressure detection module and the second pressure detection module exceeds a preset interval;
the control module is further configured to send a second control signal to the syringe pump when an absolute value of a difference between pressure values measured by the first pressure detection module and the second pressure detection module is within a preset interval, so that the current injection pressure of the syringe pump is kept unchanged.
The beneficial effects of the application include:
1. providing a first channel and a second channel within the body, thereby enabling injection of contrast agent and guiding of the guidewire to be performed in separate channels, respectively, avoiding interaction with each other;
2. the second passageway is including the first circulation pipeline, buffer chamber and the second circulation pipeline of intercommunication in proper order, when contrast medium flows in the second passageway, can slow down the velocity of flow of contrast medium through the buffer chamber, realizes the control to the contrast medium velocity of flow from this for the velocity of flow of contrast medium can keep stable, avoids appearing the too fast condition of velocity of flow simultaneously.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic view of a contrast catheter;
FIG. 2 shows a cross-sectional view of a contrast catheter;
FIG. 3 shows a partial cross-sectional view of a contrast catheter;
FIG. 4 shows a cross-sectional view of a catheter with a balloon built-in;
fig. 5 shows a block diagram of the connection of a first pressure detection module, a second pressure detection module, a control module and a syringe pump in a contrast system.
Description of main reference numerals:
100-a main body; 110-a liquid outlet hole; 120-a first pressure detection module; 121-a first probe; 130-a second pressure detection module; 131-a second probe; 200-a first channel; 300-a second channel; 310-a first flow line; 320-buffer chamber; 321-spheroids; 330-a second flow line; 331-closed end; 332-grooves; 340-conical surface; 400-a control module; 500-syringe pump.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Examples
Referring to fig. 1 and 2, in the present embodiment, a radiography catheter is provided, including a main body 100, and a first channel 200 and a second channel 300 are disposed in the main body 100. The first channel 200 and the second channel 300 are both disposed along the length of the contrast catheter. Wherein the first channel 200 is for the passage of a guidewire and the second channel 300 is for the delivery of contrast medium, the first channel 200 is not in communication with the second channel 300.
As shown in fig. 3, the second passage 300 includes a first circulation line 310, a buffer chamber 320, and a second circulation line 330, which are sequentially communicated. For ease of identification, only the second channel 300 is cross-sectional in FIG. 3, and the first probe 121 and the second probe 131 are not shown.
One end of the first flow path 310 is for inflow of contrast medium, and the other end is in communication with the buffer chamber 320. One end of the second flow path 330 communicates with the buffer chamber 320, and the other end is a closed end 331. Wherein the inner diameter of the first circulation line 310 is smaller than the inner diameter of the second circulation line 330, thereby facilitating the circulation of contrast agent. If the second flow line 330 is too narrow, the contrast agent discharge efficiency may be affected.
Referring to fig. 2, the cross-sectional areas of the first and second flow paths 310 and 330 are smaller than the cross-sectional area of the buffer chamber 320 except for the connected portions. The buffer chamber 320 serves to slow down the flow rate of the contrast medium, wherein the flow rate of the contrast medium is slowed down due to a change in a cross-sectional area during the flow of the contrast medium from the first flow path 310 to the buffer chamber 320, and thus can stably flow into the second flow path 330.
In the present embodiment, a liquid outlet hole 110 is formed on a side wall of the main body 100, and the liquid outlet hole 110 is communicated with the second flow pipeline 330. The liquid outlet hole 110 is formed on the side wall of the main body 100, which is favorable for the flowing of the contrast agent along with the blood and can be more uniformly blended into the blood.
Referring to fig. 2, after the contrast catheter enters the blood vessel, a part of the space of the blood vessel is occupied, which causes blood to flow from a gap between the outer side wall of the main body 100 and the inner wall of the blood vessel. Wherein the contrast catheter is placed along the flow direction of the blood in the blood vessel, the arrows in the figure indicate the flow direction of the blood in the blood vessel.
Since the liquid outlet hole 110 is provided on the sidewall of the main body 100, when the contrast agent flows out of the liquid outlet hole 110, the contrast agent is continuously mixed into the flowing blood, thereby achieving uniform mixing with the blood, and facilitating subsequent contrast detection. If the liquid outlet 110 is disposed at the end of the main body 100, i.e. the position of the closed end 331, part of the contrast medium stays around the liquid outlet 110 due to the shielding of the main body 100, so that the contrast medium cannot be uniformly mixed with the blood.
As shown in fig. 4, in the present embodiment, the buffer chamber 320 has a spherical shape, in which a spherical body 321 is movably provided, wherein the diameter of the spherical body 321 is smaller than the inner diameter of the buffer chamber 320. The spherical body 321 is present to control the flow rate of the contrast agent and serves to further slow down the flow rate of the contrast agent.
The inner diameters of the first and second flow paths 310 and 330 are smaller than the diameter of the spherical body 321, thereby restricting the movable space of the spherical body 321 within the buffer chamber 320. The inner wall of the second flow channel 330 has elasticity, and the spherical body 321 can be installed in the buffer chamber 320 by extrusion.
Referring to fig. 4, when the contrast agent flows in the second passage 300, the ball 321 moves to the left by the contrast agent and abuts against the junction of the buffer chamber 320 and the second flow path 330, which may cause the second passage 300 to be blocked. To avoid clogging, the inner wall of the second flow path 330 is provided with a groove 332 for the passage of the contrast medium, and the groove 332 is always in communication with the buffer chamber 320. Wherein the number of grooves 332 may be set as desired, for example, one or more.
Due to the presence of the groove 332, even if the spherical body 321 is completely fitted to the end of the second flow passage 330, the contrast medium can flow into the second flow passage 330 through the groove 332.
As shown in fig. 3, a tapered surface 340 is provided between the first flow path 310 and the buffer chamber 320. If contrast agent is returned, the spherical body 321 moves to the right and abuts against the tapered surface 340, thereby sealing against the contrast agent flowing back to the first flow path 310.
In this embodiment, the spherical body 321 is disposed in the buffer cavity 320, which not only can play a role in slowing down and stabilizing the flow rate of the contrast agent, but also has a function of a one-way valve for avoiding the backflow of the contrast agent.
The contrast catheter is inserted into the blood vessel, and due to the presence of the outlet aperture 110, blood may flow into the second flow conduit 330 through the outlet aperture 110, thereby affecting the flow of contrast agent.
To avoid the above problem, in the present embodiment, the liquid outlet hole 110 includes a first end portion and a second end portion, which are separated at two ends, the first end portion is directly connected to the second flow path 330, and the second end portion is directly connected to the blood vessel, wherein the second end portion is inclined toward the side where the closed end 331 is located.
Referring to fig. 2, after the contrast catheter is inserted into the blood vessel, the liquid outlet hole 110 is inclined in the blood flow direction, and thus the inflow of blood into the liquid outlet hole 110 can be prevented. Meanwhile, when the contrast agent flows out from the liquid outlet hole 110, the contrast agent initially has a partial velocity parallel to the flowing direction of blood, so that the contrast agent can be quickly fused into the blood when flowing into the blood vessel, and the flowing of the blood is not blocked. The cross section of the liquid outlet 110 may be elliptical.
In the present embodiment, the main body 100 is provided with a first pressure detection module 120 and a second pressure detection module 130, and the first pressure detection module 120 and the second pressure detection module 130 are used for detecting blood pressure in a blood vessel. Wherein the positions detected by both the first pressure detection module 120 and the second pressure detection module 130 are different.
Specifically, the first pressure detection module 120 includes a first probe 121 for sensing blood pressure, and the second pressure detection module 130 includes a second probe 131 for sensing blood pressure. Wherein the first probe 121 and the second probe 131 are both fixed to a sidewall of the main body 100.
Referring to fig. 2 and 4, since the liquid outlet hole 110 is provided at a side of the main body 100, both the first probe 121 and the second probe 131 may be sequentially provided along the length of the main body 100 and separately provided at both sides of the liquid outlet hole 110, thereby realizing measurement of pressure at two different positions within a blood vessel.
If the first probe 121 and the second probe 131 are too close together, the pressure values measured by the first pressure detection module 120 and the second pressure detection module 130 are very close or the same, and this cannot accurately detect the effect of the inflow of contrast agent on the intravascular pressure. For this reason, in the present embodiment, the interval between the first probe 121 and the second probe 131 may be not less than the length of the second circulation line 330. In some other embodiments the spacing between the first probe 121 and the second probe 131 may also be set as desired.
The first pressure detection module 120 may employ an optical fiber pressure sensor or a thin film pressure sensor, and the second pressure detection module 130 may employ an optical fiber pressure sensor or a thin film pressure sensor.
The main body 100 may have a routing hole formed therein for allowing signal wires of the first pressure detection module 120 and the second pressure detection module 130 to pass through.
Referring to fig. 5, in the present embodiment, the first pressure detection module 120 and the second pressure detection module 130 are electrically connected to the control module 400, and the control module 400 is further electrically connected to the syringe pump 500, wherein the syringe pump 500 is used to power the flow of the contrast agent.
When the absolute value of the difference between the pressure values measured by the first pressure detection module 120 and the second pressure detection module 130 exceeds a preset interval, the control module 400 sends a control signal to the syringe pump 500, thereby adjusting the injection pressure of the syringe pump 500. The control module 400 may employ a microprocessor or a single-chip microcomputer.
By adjusting the injection pressure of syringe pump 500, the flow rate of contrast agent may be changed. In general, the greater the injection pressure, the faster the flow rate of contrast agent; the smaller the injection pressure, the slower the flow rate of contrast agent.
The first pressure detecting module 120 and the second pressure detecting module 130 are used for detecting the pressure in the blood vessel, but since the positions of the first probe 121 and the second probe 131 on the main body 100 are different, there is a certain difference in the magnitudes of the pressures measured by the first pressure detecting module 120 and the second pressure detecting module 130.
Referring to fig. 4, the first probe 121 is located at the right side of the liquid outlet 110, and the contrast medium flowing out of the liquid outlet 110 does not pass through the first probe 121, and for this reason, the pressure value measured by the first pressure detection module 120 is approximately equal to the initial blood pressure value in the blood vessel; the second probe 131 is located at the left side of the outlet hole 110, and the contrast medium flowing out of the outlet hole 110 passes through the second probe 131, and for this purpose, the pressure value measured by the second pressure detection module 130 is equal to the pressure value in the blood vessel after the contrast medium is injected.
In this embodiment, a contrast system is also proposed.
The contrast system comprises a syringe pump 500, a control module 400 and the contrast catheter mentioned above, wherein the syringe pump 500 is used to power the flow of contrast agent within the contrast catheter.
Referring to fig. 5, a main body 100 of the contrast catheter is provided with a first pressure detection module 120 and a second pressure detection module 130, and the first pressure detection module 120, the second pressure detection module 130 and the syringe pump 500 are electrically connected to the control module 400.
Referring to fig. 4, after the contrast catheter is inserted into the blood vessel, the first pressure detecting module 120 and the second pressure detecting module 130 are respectively used to detect the pressures at both sides of the outlet hole 110 on the sidewall of the main body 100 in the blood flow direction in real time.
A control module 400 for transmitting a first control signal to the syringe pump 500 to adjust the injection pressure of the syringe pump 500 when the absolute value of the difference between the pressure values measured by the first pressure detection module 120 and the second pressure detection module 130 exceeds a preset interval;
the control module 400 is further configured to send a second control signal to the syringe pump 500 to enable the syringe pump 500 to keep the current injection pressure unchanged when the absolute value of the difference between the pressure values measured by the first pressure detection module 120 and the second pressure detection module 130 is within a preset interval.
In the present embodiment, the pressure value measured by the first pressure detection module 120 is set to P1, and the pressure value measured by the second pressure detection module 130 is set to P2. If the absolute value of the difference between P1 and P2 exceeds the preset interval, the injection amount of the contrast agent in the corresponding time is too large, and the flow rate of the contrast agent is required to be adjusted to control the injection amount of the contrast agent, so that the influence of the injected contrast agent on the pressure in the blood vessel is reduced.
The contrast catheter proposed in this embodiment has at least the following advantages:
1. the provision of the first channel 200 and the second channel 300 within the body 100 thereby enables the injection of contrast agent and the guiding of the guidewire to be performed in separate channels, respectively, avoiding interaction with each other;
2. the second channel 300 includes a first flow pipeline 310, a buffer cavity 320 and a second flow pipeline 330 which are sequentially communicated, when the contrast agent flows in the second channel 300, the flow rate of the contrast agent can be slowed down through the buffer cavity 320, so that the control of the flow rate of the contrast agent is realized, the flow rate of the contrast agent can be kept stable, and the condition of too high flow rate is avoided;
3. the buffer cavity 320 is internally provided with a spherical body 321, thereby further playing a role in slowing down and stabilizing the flow rate of the contrast agent;
4. the spherical body 321 and the conical surface 340 are matched with each other, so that the spherical body can play the role of a one-way valve and can avoid the backflow of contrast agent;
5. the liquid outlet hole 110 is inclined, so that blood can be prevented from flowing into the second channel 300 through the liquid outlet hole 110. In addition, the contrast medium initially has a partial velocity parallel to the blood flow direction when flowing out of the liquid outlet 110, so that the contrast medium does not hinder the blood flow when flowing into the blood vessel;
6. the first pressure detecting module 120 and the second pressure detecting module 130 are used to detect blood pressure in a blood vessel, and the injection amount of the contrast agent is determined by comparing the pressures detected by the two. In addition, when the injection amount has a significant effect on the pressure inside the blood vessel, the control module 400 is used to control the injection pump 500, thereby adjusting the flow rate of the contrast agent, so as to control the injection amount of the contrast agent, and reduce the effect of the injected contrast agent on the pressure inside the blood vessel.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (8)
1. A contrast catheter comprising a body having a first passageway and a second passageway disposed therein; wherein the first channel is used for the guide wire to pass through, the second channel is used for conveying contrast medium, and the first channel is not communicated with the second channel;
the second channel comprises a first circulation pipeline, a buffer cavity and a second circulation pipeline which are sequentially communicated; one end of the first circulating pipeline is used for flowing in the contrast agent, and the other end of the first circulating pipeline is communicated with the buffer cavity; one end of the second circulating pipeline is communicated with the buffer cavity, and the other end of the second circulating pipeline is a closed end; the inner diameter of the first circulation pipeline is smaller than that of the second circulation pipeline; the buffer cavity is used for slowing down the flow rate of the contrast agent;
a liquid outlet hole is formed in the side wall of the main body and is communicated with the second flow pipeline;
the buffer cavity is spherical, and a spherical body is arranged in the buffer cavity, wherein the diameter of the spherical body is smaller than the inner diameter of the buffer cavity;
the inner diameters of the first circulation pipeline and the second circulation pipeline are smaller than the diameter of the spherical body; the inner wall of the second circulation pipeline is provided with a groove for circulating contrast agent, and the groove is always communicated with the buffer cavity;
the main body is provided with a first pressure detection module and a second pressure detection module, and the first pressure detection module and the second pressure detection module are used for detecting blood pressure in blood vessels;
the first pressure detection module comprises a first probe for sensing blood pressure, and the second pressure detection module comprises a second probe for sensing blood pressure; the first probe and the second probe are both fixed on the side wall of the main body;
the first probe and the second probe are sequentially arranged along the length of the main body and are respectively arranged at two sides of the liquid outlet hole.
2. The imaging catheter of claim 1, wherein the exit port comprises a first end and a second end separated by two ends, the first end in direct communication with the second flow conduit, wherein the second end is sloped toward a side of the closed end.
3. The imaging catheter of claim 1, wherein a spacing between the first probe and the second probe is not less than a length of the second flow-through conduit.
4. The contrast catheter of claim 1, wherein the first pressure detection module comprises a fiber optic pressure sensor or a film pressure sensor;
the second pressure detection module comprises an optical fiber pressure sensor or a film pressure sensor.
5. The contrast catheter of claim 1, wherein a tapered surface is disposed between the first flow conduit and the buffer lumen.
6. The imaging catheter of claim 2, wherein the exit port is oval in cross-section.
7. The contrast catheter of claim 1, wherein an inner wall of the second flow-through conduit is resilient.
8. A contrast system comprising a syringe pump, a control module, and the contrast catheter of claim 1, wherein the syringe pump is configured to power a flow of contrast agent within the contrast catheter;
a first pressure detection module and a second pressure detection module are arranged on the main body of the radiography catheter, and the first pressure detection module, the second pressure detection module and the injection pump are electrically connected with the control module;
the first pressure detection module and the second pressure detection module are respectively used for detecting the pressure at two sides of the liquid outlet hole on the side wall of the main body along the blood flow direction in real time;
the control module is used for sending a first control signal to the injection pump to adjust the injection pressure of the injection pump when the absolute value of the difference between the pressure values measured by the first pressure detection module and the second pressure detection module exceeds a preset interval;
the control module is further configured to send a second control signal to the syringe pump when an absolute value of a difference between pressure values measured by the first pressure detection module and the second pressure detection module is within a preset interval, so that the current injection pressure of the syringe pump is kept unchanged.
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| CN202311099809.XA CN116850433B (en) | 2023-08-30 | 2023-08-30 | Contrast catheter and contrast system |
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| CN116850433A (en) | 2023-10-10 |
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