CN221771211U - Electronically controlled memory alloy active medical catheter - Google Patents
Electronically controlled memory alloy active medical catheter Download PDFInfo
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- CN221771211U CN221771211U CN202322946451.1U CN202322946451U CN221771211U CN 221771211 U CN221771211 U CN 221771211U CN 202322946451 U CN202322946451 U CN 202322946451U CN 221771211 U CN221771211 U CN 221771211U
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- 239000003814 drug Substances 0.000 abstract description 8
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- Media Introduction/Drainage Providing Device (AREA)
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Abstract
The utility model discloses an electric control memory alloy active medical catheter, which comprises a catheter body and two electrodes, wherein one ends of the two electrodes are respectively connected with the catheter body; the catheter body is a tube formed by winding a single strand or a plurality of strands of memory alloy wires, and the tube is a hollow capillary tube similar to a spring tube; both ends of the catheter body are open; the inner wall surface of the catheter body is provided with an inner bushing, and the outer wall surface is provided with an outer bushing. The utility model realizes the adjustment of various actions and changing forms of the electric control catheter by adjusting the current through the external electric control device, achieves the aim of meeting the delivery of minimally invasive surgical instruments and medicines, and is easy to operate and popularize.
Description
Technical Field
The utility model relates to the technical field of interventional therapy medical instruments, in particular to an electric control memory alloy active medical catheter.
Background
At present, the minimally invasive interventional therapy is developed through the pipelines of the human body such as blood vessels, alimentary tracts, lung air pipes and the like, so that the minimally invasive interventional therapy gradually becomes a preferred scheme for replacing the traditional operation therapy, and has the advantages of small wound, light pain, quick recovery of patients, difficult infection, less postoperative sequelae and the like. The minimally invasive catheter is a common necessary consumable for vascular intervention, and has the basic function of establishing an effective channel reaching the focus part of a patient so that subsequent minimally invasive surgical instruments and medicines can directly reach the focus part along the channel, thereby enabling a doctor to complete the examination and operation outside the patient.
Most of the current minimally invasive catheters are made of high polymer materials, a multi-layer composite structure is designed according to different functions and using positions, and hollow pipelines with different specifications are arranged in the middle of the minimally invasive catheters and used for delivering minimally invasive surgical instruments and medicines.
The minimally invasive surgery has a set of basic procedures communicated in operation: firstly, a finer and softer minimally invasive guide wire is used for establishing a guide path which meanders from outside the body to a focus part; step two, sheathing the minimally invasive catheter into the outer end of the guide wire, and gradually pushing the minimally invasive catheter to the focus part along the guide wire; thirdly, extracting the minimally invasive guide wire in the first step from the minimally invasive catheter; and the fourth step utilizes the hollow pipeline of the catheter to deliver minimally invasive surgical instruments and medicines. The direct examination and treatment of the focus part can be formally started after the third step;
However, current minimally invasive catheters have the following problems:
1. The existing minimally invasive catheter working principle determines that the pushing direction cannot be adjusted automatically in the operation process, and the minimally invasive catheter has to rely on a guide path which is established in advance by the minimally invasive guide wire and is bent to a focus part;
2. Because of the great number of branches of the blood vessels of the human body and the long length of the catheter which is deep into the human body during actual operation can be more than 1.5 meters, even if a guiding path is established, the catheter is sometimes blocked when the guiding is performed due to the different softness and toughness of the guide wire and the catheter when facing the complicated and narrow channel branches. The surgical difficulty is increased, the surgical time is prolonged, and the risks of vascular injury, intimal injury, visceral spasm and the like can be caused;
3. The general procedure of minimally invasive surgical operation requires three steps to complete the preparation of formal examination and treatment, if the head section of the minimally invasive catheter can have autonomous steering capability. In many scenes, three steps can be combined into one step, and the catheter is directly used for directly reaching the focus part, so that the operation time is greatly shortened, the operation difficulty is reduced, the pain of a patient is relieved, and the success rate of the operation is improved.
The utility model can provide an electric control memory alloy active medical catheter, which can solve the problems.
Disclosure of utility model
In order to solve the technical problems, the utility model provides the electric control memory alloy active medical catheter, and the current is adjusted through the external electric control device to realize the adjustment of various actions and changing forms of the electric control catheter, so that the aim of delivering minimally invasive surgical instruments and medicines is fulfilled, and the operation and popularization are easy.
The technical scheme of the utility model is as follows: the utility model provides an electric control memory alloy active medical catheter, which comprises a catheter body and two electrodes, wherein one ends of the two electrodes are respectively connected with the catheter body;
The catheter body is a tube formed by winding a single strand or a plurality of strands of memory alloy wires, and the tube is a hollow capillary tube similar to a spring tube; both ends of the catheter body are open;
The inner wall surface of the catheter body is provided with an inner bushing, and the outer wall surface is provided with an outer bushing.
Further, one of the two ends of the catheter body is defined as a head part, and the other end is defined as a tail part; the two electrodes are respectively defined as a head electrode and a tail electrode, one end of the head electrode is connected with the head of the catheter body, and the other end of the electrode penetrates through the interior of the catheter body and extends out of the tail of the catheter body; one end of the tail electrode is connected with the tail of the catheter body, and the other end of the tail electrode extends out.
Further, one end of the electrode is wound into the tube together with the memory alloy wire, and the other end of the electrode is led out from the catheter body.
Further, the catheter body is provided with a developing mark.
Further, the outer surface of the catheter body is covered with an inner layer, and the inner layer is a PTFE coating or a heat-shrinkable film;
The outer surface of the inner layer is covered with an outer layer, and the outer layer is a functional coating.
Further, the inner lining and the outer lining are respectively high polymer material layers;
The thickness of the inner bushing and the outer bushing is 0.015-0.40mm respectively.
Further, one end of the electrode is connected with the catheter body, and the other end is connected with a handle.
Further, the handle is a plastic handle, and the electrode is injection molded on the plastic handle.
Further, the wire diameter of the memory alloy wire is 0.05-0.25mm, and the pipe diameter of the catheter body is 1.0-5.0mm.
Further, the tail of the catheter body is butt welded with a section of medical stainless steel spring ring.
Further, the memory alloy wire is a memory alloy wire with an electric control temperature of 37.5-42 ℃.
The beneficial technical effects of the utility model are as follows:
The utility model comprises a catheter body and two electrodes, wherein one ends of the two electrodes are respectively connected with the catheter body; the catheter body is a tube formed by winding a single strand or a plurality of strands of memory alloy wires, and the tube is a hollow capillary tube similar to a spring tube; the utility model adjusts the current through the external electric control device to realize the adjustment of various actions and changing forms of the electric control catheter, thus having at least the following advantages:
1. Compared with the pure mechanical transmission mode of the traditional catheter, the control of the electric control catheter directly acts on the catheter head section in an electronic mode, is more accurate and rapid, and is not influenced by the length of the catheter completely. Theoretically, the remote operation beyond ten thousand miles can be supported by means of an operation robot;
2. The control process of the electric control conduit is visual and simple like the operation of the remote control electric vehicle, and the operation can be skillfully performed only by simple training and practice in a short time. The method greatly gets rid of the dependence on the operation method of the minimally invasive guide wire by doctors, and is very favorable for popularization of minimally invasive interventional therapy;
3. The electric control catheter can adjust the head section form and radian in real time, and particularly can move along with the shape at the branch of the blood vessel, so that the operation time is obviously shortened, the fatigue of a doctor is relieved, and the friction and damage to the wall of the blood vessel are greatly reduced;
4. because the core control element of the electric control catheter is only nested in the middle of the high polymer layer at the front section of the catheter, the self wall thickness is only 0.05-0.25mm. So most of the minimally invasive catheters can be electrically controlled and upgraded in theory at present, and the shape, structure and performance of the minimally invasive catheters are not changed.
Drawings
FIG. 1 is an external view of the present utility model;
FIG. 2 is an axial cross-sectional view of the present utility model;
FIG. 3 is a motion state diagram of the present utility model;
the reference numerals are as follows:
Catheter body 1, inner liner 2, outer liner 3, head electrode 4, tail electrode 5, development mark 6, inner layer 7 and outer layer 8.
Detailed Description
In order that the manner in which the above recited features of the present utility model are attained and can be understood in detail, a more particular description of the utility model, briefly summarized below, may be had by reference to the appended drawings and examples, which are illustrated in their embodiments, but are not intended to limit the scope of the utility model.
The electric control memory alloy active medical catheter is called an electric control catheter for short in the embodiment.
Example 1: as shown in fig. 1 to 2, the electric control memory alloy active medical catheter comprises a catheter body 1 and two electrodes, wherein one ends of the two electrodes are respectively connected with the catheter body;
The catheter body is a tube formed by winding a single strand or a plurality of strands of memory alloy wires, and the tube is a hollow capillary tube similar to a spring tube; both ends of the catheter body are open;
The inner wall surface of the catheter body is provided with an inner bushing 2, and the outer wall surface is provided with an outer bushing 3. I.e. the catheter body wound with the memory alloy wire is positioned in the interlayer of the inner lining and the outer lining.
The hollow cavity of the electric control catheter is used for delivering minimally invasive surgical instruments and medicines.
In this embodiment, one of the two ends of the catheter body is defined as a head, and the other end is defined as a tail; two said electrodes are respectively defined as a head electrode 4 and a tail electrode 5, one end of said head electrode being connected to the head of said catheter body, the other end of the electrode passing through the interior of the catheter body and extending from the tail of the catheter body; one end of the tail electrode is connected with the tail of the catheter body, and the other end of the tail electrode extends out.
Of course, one end of the electrode is wound into the tube together with the memory alloy wire, and the other end of the electrode is led out from the catheter body.
Since the movement of the electric control catheter is controlled by current, the electric control catheter needs to be heated uniformly as a whole to make the movement of the electric control catheter smoother, and therefore, one of the two electrodes is preferably electrically connected with the head of the guide wire body, and the other electrode is preferably electrically connected with the tail of the guide wire body. Namely: the electrodes should be arranged at both ends of the guide wire body, respectively, so that current can flow through the guide wire body effectively, thereby giving full play to the electrothermal effect, heating uniformly and moving more smoothly.
In this embodiment, the catheter body is provided with a developing mark 6. The developing mark can be a developing ring welded outside the guide wire body, can be changed into a platinum-tungsten developing wire, and is wound into a memory alloy catheter together with an electrode and a memory alloy wire, so that the integration and the microminiaturization are further improved.
In this embodiment, the outer surface of the catheter body is covered with an inner layer 7, and the inner layer is a TPU polymer layer, a PTFE coating or a heat-shrinkable film;
The outer surface of the inner layer is covered with an outer layer 8, which is a hydrophilic coating or other functional coating. The inner layer mainly plays roles of insulating, isolating metal from contacting human tissues, increasing toughness and the like; the outer layer has the functions of reducing friction, protecting the inner wall of the blood vessel, enhancing trafficability and the like. Ensuring the smoothness of the electric control catheter during vascular intervention, protecting the blood vessel, eliminating the influence of bioelectricity on the blood vessel, and the like.
In this embodiment, the inner liner and the outer liner are polymer material layers such as TPU, PTFE, pebax, or the like, respectively;
The thickness of the inner bushing and the outer bushing is 0.015-0.40mm respectively. The inner liner is convenient for the medicine to smoothly enter the required position through the catheter, if the inner liner is not contained, the medicine can be chemically acted on the memory alloy wire to react, and if the instrument is in a state of being poked on the seam of the tube wall, the operation risk is increased.
In this embodiment, one end of the electrode is connected to the catheter body, and the other end is connected to the handle.
The handle is a plastic handle, and the electrode is injection-molded on the plastic handle. One end of the electrode is electrically connected with the guide wire body, the other end of the electrode is injection-molded on the handle and is connected with a terminal embedded on the handle, and external electric control equipment can be electrically connected with the terminal to directly control the movement of the catheter.
In the embodiment, the wire diameter of the memory alloy wire is 0.05-0.25mm, and the pipe diameter of the catheter body is 1.0-5.0mm.
In this embodiment, the memory alloy wire is a memory alloy wire with an electrically controlled temperature of 37.5-42 ℃.
The control temperature of the electric control conduit is greatly reduced from the original 45-60 ℃ to 37.5-42 ℃. This temperature zone coincides substantially with the temperature of the body itself, without fear of high temperatures leading to the risk of protein and other components in the blood being altered and destroyed.
Because the catheter body and the electrode of the electric control catheter are coated between the inner lining and the outer lining which are made of high polymer materials and do not directly contact with the human body, the influence of micro-current on the human body and the biocompatibility and the safety of the catheter are not worried at all.
Example 2: an electronically controlled memory alloy active medical catheter similar in construction to that of example 1, except: the tail of the catheter body is butt welded with a section of medical stainless steel spring ring. For example, the length of the catheter body (which refers to a catheter body wound by a memory alloy wire) is 5mm, and the length of the spring ring is 45mm. For example, the spring ring is made of stainless steel, and is used for enhancing the strength and toughness of the electric control conduit. And the material cost of the whole electric control conduit can be reduced.
The working principle and the working process of the utility model are as follows:
The principle of the electric control conduit is to skillfully utilize the characteristic that the shape of the double-way memory alloy shows memory round-trip change when the phase change reaction occurs along with the temperature change. The single strand or multiple strands of memory alloy wires implanted into the electrode are added in the interlayer between the inner lining and the outer lining of the electric control catheter head section to be wound into the catheter, when the electrode is electrified, the memory alloy catheter is subjected to temperature change due to electric heating reaction, so that phase change reaction is triggered, the catheter head section is made to present different forms and bending radians, and the requirement of controlled bending of the catheter head section according to the requirement in the operation process is met;
The control logic of the electric control catheter is to adjust different voltage and current, so that the catheter head section can have different temperature changes, and the catheter head section can show different forms and movement behaviors according to preset settings at different temperatures. Such as: the reciprocating bending of 360 degrees is performed on a two-dimensional plane, and as shown in fig. 3, the electric control temperature is higher and higher from left to right.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present utility model, and these improvements and modifications should also be regarded as the protection scope of the present utility model.
Claims (10)
1. An electric control memory alloy active medical catheter is characterized in that: comprises a catheter body (1) and two electrodes, wherein one ends of the two electrodes are respectively connected with the catheter body;
The catheter body is a tube formed by winding a single strand or a plurality of strands of memory alloy wires, and the tube is a hollow capillary tube similar to a spring tube; both ends of the catheter body are open;
The inner wall surface of the catheter body is provided with an inner bushing (2), and the outer wall surface is provided with an outer bushing (3).
2. The electrically controlled memory alloy active medical catheter of claim 1, wherein: defining one of two ends of the catheter body as a head part and the other end as a tail part; two said electrodes are respectively defined as a head electrode (4) and a tail electrode (5), one end of said head electrode being connected to the head of said catheter body, the other end of the electrode passing through the interior of the catheter body and protruding from the tail of the catheter body; one end of the tail electrode is connected with the tail of the catheter body, and the other end of the tail electrode extends out.
3. The electrically controlled memory alloy active medical catheter of claim 1, wherein: one end of the electrode is wound into the tubular object along with the memory alloy wire, and the other end of the electrode is led out from the catheter body.
4. The electrically controlled memory alloy active medical catheter of claim 1, wherein: the catheter body is provided with a developing mark (6).
5. The electrically controlled memory alloy active medical catheter of claim 1, wherein: the outer surface of the catheter body is covered with an inner layer (7), and the inner layer is a PTFE coating or a heat-shrinkable film;
the outer surface of the inner layer is covered with an outer layer (8), and the outer layer is a functional coating.
6. The electrically controlled memory alloy active medical catheter of claim 1, wherein: the inner lining and the outer lining are respectively high polymer material layers;
The thickness of the inner bushing and the outer bushing is 0.015-0.40mm respectively.
7. The electrically controlled memory alloy active medical catheter of claim 1, wherein: one end of the electrode is connected with the catheter body, and the other end is connected with the handle.
8. The electrically controlled memory alloy active medical catheter of claim 7, wherein: the handle is a plastic handle, and the electrode is injection-molded on the plastic handle.
9. The electrically controlled memory alloy active medical catheter of claim 1, wherein: the diameter of the memory alloy wire is 0.05-0.25mm, and the pipe diameter of the catheter body is 1.0-5.0mm.
10. The electrically controlled memory alloy active medical catheter of claim 1, wherein: the tail of the catheter body is butt welded with a section of medical stainless steel spring ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322946451.1U CN221771211U (en) | 2023-11-01 | 2023-11-01 | Electronically controlled memory alloy active medical catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322946451.1U CN221771211U (en) | 2023-11-01 | 2023-11-01 | Electronically controlled memory alloy active medical catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221771211U true CN221771211U (en) | 2024-09-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322946451.1U Active CN221771211U (en) | 2023-11-01 | 2023-11-01 | Electronically controlled memory alloy active medical catheter |
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| Country | Link |
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| CN (1) | CN221771211U (en) |
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2023
- 2023-11-01 CN CN202322946451.1U patent/CN221771211U/en active Active
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