CN217311662U - Portal vein stent implanting assembly for fixing radioactive particles - Google Patents

Abstract

The utility model belongs to the field of medical equipment, and relates to a portal vein stent placement component for fixing radioactive particles, which comprises a balloon dilatation catheter placement device, a radioactive particle stent, a traction device, a guide wire, a puncture needle and an outer sheath matched with the guide wire. The method is characterized in that: the balloon dilatation catheter implanting device consists of an outer tube, an inner tube and a balloon. The rigid part of the radioactive particle bracket is made of nickel-chromium memory alloy, and a radioactive particle tube filled with radioactive particle strips is inserted into the bracket in a spiral mode. The traction device consists of a silica gel trumpet-shaped compression rubber sleeve, a soft traction wire and an outer tube. The helical tip of the guidewire is marked with a radiopaque marker coating. The puncture needle and the inner tube of the matched outer sheath of the puncture needle are matched with each other properly. The utility model discloses can the accurate positioning, reduce the operation degree of difficulty to realize expanding the blood vessel when control cancer embolus progresses, prevent that cancer embolus from droing, promote portal blood flow, the practicality is strong, has wide market prospect.

Description

Portal vein stent implanting assembly for fixing radioactive particles

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a subassembly is put into to fixed radioactive particle's portal vein support.

Background

Liver cancer is a common malignant tumor in clinic, has great harm, can cause intrahepatic metastasis and systemic metastasis of tumors, and is easy to form cancer embolus. Liver cancer invades portal vein to form portal vein cancer embolus, which can aggravate disease development and cancer metastasis, resulting in lower long-term survival rate of patients. Therefore, the control of the portal vein cancer embolus has important significance for improving the long-term survival rate of the liver cancer patient. At present, a palliative treatment scheme is clinically adopted, and a stent is implanted into a portal vein by means of an interventional minimally invasive puncture technology to open the portal vein of embolism, so that normal blood flow enters the liver, the function of the liver is improved, and the pressure of the portal vein is reduced. However, the stent itself has no effect on treating tumors and only plays a role in expanding the vascular cavity, and more than 50 percent of patients can generate the occurrence of in-stent reocclusion within 3 months. Therefore, the clinical treatment is to continuously irradiate the cancer embolus by putting some radioactive particles into the bracket while opening the portal vein so as to treat the cancer embolus.

However, there are problems with such devices: 1. the currently used radioactive particle strips are mostly vertical strips, because the growth position of the cancer embolus in the blood vessel is uncertain, a doctor needs to adjust the placement position for many times, the radioactive particle stent is not easy to accurately position and firmly implant, and the success rate of the operation is greatly reduced; 2. the portal vein stent and 125I particle strip combined implantation technology is complex, high in cost and less in domestic application; 3. the common particle implantation is easy to generate the particle drift phenomenon, the treatment effect is influenced, the drifted particles enter blood vessels to easily form thrombus to endanger life, most radioactive particle strips cannot be firmly attached to the blood vessel walls, and the deviation is easy to generate in the blood flowing process. Therefore, the research and development of a bracket capable of fixing radioactive particles and an auxiliary device thereof are urgently needed, the utility model innovatively combines the radioactive particle strip, the portal vein bracket and the balloon catheter, can realize accurate positioning, and reduces the operation difficulty; the function of expanding blood vessel, preventing cancer embolism from falling off and promoting portal blood flow is realized while the progress of the cancer embolism is controlled.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, an object of the utility model is to provide a subassembly is put into to fixed radioactive particle's portal vein support, fuses radioactive particle strip and portal vein support to fixed and accurate the putting into through the sacculus pipe, expand portal vein and control the cancer embolus progress through the radiation therapy when guaranteeing the blood flow, reach better treatment, reduce the operation degree of difficulty.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a pair of subassembly is put into to fixed radioactive particle's portal vein support, include: the balloon dilatation catheter implanting device comprises a balloon dilatation catheter implanting device 1, a radioactive particle stent 2, a traction device 3, a guide wire 4, a puncture needle matched with an outer sheath 5 and a puncture needle 6.

The puncture needle matching sheath 5 is a structure sleeved on the puncture needle 6, and the puncture needle 6 and the puncture needle matching sheath inner tube 51 are matched properly. The puncture needle 6 is withdrawn after the puncture of the cancer embolus is finished, and the guide wire 4 can enter a channel formed by puncture through the puncture needle matching with the inner tube 51 of the outer sheath, so as to enter the portal cancer embolus.

Further, the helical tip of the guidewire 4 is marked with a radiopaque marker coating 41 to measure the length of the cancer embolus and thereby precisely adjust the length of the radioactive seed strip.

Further, the radioactive particle tube 21 is fixed to the radioactive particle stent 2 in a spiral shape and is fitted over the balloon dilatation catheter insertion device inner tube 12. The rigid part of the radioactive particle stent is formed by a memory alloy tubular structure, and the blood vessel can be slightly expanded due to the expansion caused by the temperature rise so as to fix the stent.

Further, the balloon dilatation catheter implanting device 1 is composed of a balloon 11, an inner tube 12 and an outer tube 13, the outer tube 13 is sleeved on the inner tube 12, the proximal end of the outer tube is connected with an expanding balloon and used for fixing the traction device 3, the distal end of the outer tube can be connected with a pressure pump, the balloon 11 is inflated to expand the balloon 11, and the vessel dilatation is promoted to facilitate the placement of the radioactive particle stent 2. The balloon 11 is marked with a radiopaque marker coating to aid in positioning and precise expansion of the stent.

Furthermore, the traction device 3 is composed of a silica gel trumpet-shaped compression rubber sleeve 31, a soft traction wire 32 and an outer tube at the inner end of the trumpet-shaped compression rubber sleeve, and the opening of the trumpet-shaped compression rubber sleeve 31 faces to the near end. The soft traction wire 32 can pull the horn-shaped compression rubber sleeve 31 to slowly compress into the outer tube balloon 11 of the balloon dilatation catheter implanting device, so that the outer tube 13 is tightly sleeved on the inner tube 12, the radioactive particle support 2 is fixed, the radioactive particle support 2 is guaranteed to be accurately implanted into a cancer embolus position, displacement does not occur before, and a doctor can conveniently control the position.

The beneficial effects of the utility model are that, compared with the prior art, the utility model discloses during the radioactive particle strip is fixed in portal vein support, the support setting makes the inseparable cover of outer tube that sacculus expansion pipe put into the device establish the fixed bolster on the inner tube in the hose, thereby this system keeps the support stable transporting the in-process. The hose is placed through the seal wire, and the seal wire plays guiding orientation's effect, and guiding orientation is effectual. The horn-shaped rubber sleeve device completely enters the outer tube of the balloon dilatation catheter imbedding device by pulling the traction wire, and the radioactive particle stent is released. The radioactive particle stent after being released is expanded, and the far end of the outer tube is connected with a pressure pump to inflate the saccule so as to expand the blood vessel, thus helping the radioactive particle stent to be further expanded and play a role.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 shows a memory metal.

Fig. 3 is a schematic view of a balloon dilation catheter insertion device.

Fig. 4 is a schematic view of a traction device.

Fig. 5 is a schematic view of a guidewire.

Fig. 6 is a schematic view of the matching sheath of the needle.

Fig. 7 is a schematic view of the needle.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the term "distal" refers to the end of the device that is relatively distal to the portal cancer embolus during surgery, and "inner" refers to the end of the device that is relatively proximal to the portal cancer embolus during surgery; further, the terms "upper," "lower," "top," "middle," "inner," "outer," and the like refer to an orientation or positional relationship that is merely used to facilitate the description of the invention and to simplify the description, but does not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

As shown in fig. 1, the present invention provides a portal stent implantation assembly for fixing radioactive particles, comprising: the balloon dilatation catheter implanting device comprises a balloon dilatation catheter implanting device 1, a radioactive particle stent 2, a traction device 3, a guide wire 4, a puncture needle matched with an outer sheath 5 and a puncture needle 6. The balloon dilatation catheter implanting device comprises an outer tube, an inner tube and a balloon, wherein the outer tube is sleeved on the inner tube, the near end of the outer tube is connected with an expansion balloon, the far end of the outer tube can be connected with a pressure pump, the balloon is inflated to be expanded, and the balloon is provided with a radiopaque marker coating mark. The traction device is composed of a soft traction wire and a silica gel horn-shaped compression rubber sleeve, and the horn-shaped compression rubber sleeve is opened towards the near end. The puncture needle matching needle sheath is a structure sleeved on the puncture needle, and the puncture needle and the inner tube of the outer sheath matching the puncture needle are matched properly.

As shown in fig. 1 and 2, the rigid portion of the radioactive particle support 2 is made of a memory alloy. Wherein the radioactive particle tube is spiral, the position of the radioactive particle tube does not need to be adjusted according to cancer embolus in the interventional operation, and the success rate of the operation can be increased. The uniform distribution of radioactive particles enables maximum range and higher efficiency in controlling the progression of cancer emboli. Under the effect of the radioactive particle strip on the stent, the radioactive particles are not influenced by blood flow and do not drift, can be firmly attached to the vessel wall, and can continuously perform brachytherapy.

As shown in fig. 3, the balloon dilatation catheter insertion device 1 includes a balloon 11, an inner tube 12, and an outer tube 13. The far end of the outer tube 13 is used for connecting a pressure pump outwards, and the balloon 11 can be expanded by pressurizing and inflating to assist the expansion of the radioactive stent 2 and facilitate the blood vessel expansion. The inner end of the inner tube 12 is sheathed with a radioactive particle stent 2.

As shown in fig. 4, the traction device 3 includes a trumpet-shaped compression rubber sleeve 31, a traction wire 32 and an outer tube at the inner end of the trumpet-shaped compression rubber sleeve.

As shown in fig. 5, the helical tip of the guidewire 4 is marked with a radiopaque marker coating 41 to measure the length of the cancer embolus and thereby adjust the length of the radioactive seed strip accurately.

The use method of the device is as follows with the attached drawings: before the device system is used, the tumor in the patient needs to be subjected to radiography treatment in advance. Firstly, the puncture needle 6 is sleeved into the puncture needle matching sheath 5, the puncture needle 6 enters the inner tube 51 of the puncture needle matching sheath, and the two match properly. Under the operation of a doctor, puncture is carried out to the position where the portal vein cancer embolus is displayed through the contrast treatment. After the puncture is finished, the puncture needle 6 is withdrawn, the puncture needle matching sheath 5 is temporarily stopped in the portal vein, and simultaneously, as shown in fig. 3, the guide wire 4 is threaded into the puncture needle matching sheath 5 along the blood vessel, and the guide wire 4 is made of deformable thin metal, so that the guide wire tip 41 is ensured to reach the position of the cancer embolus displayed by the radiography before. As shown in fig. 5, the helical coil on the guide wire tip 41 is wrapped with an equidistant opaque marker coating, and the radiopaque marker coating can be used to accurately measure the length of the cancer embolus in conjunction with preoperative imaging, so as to facilitate the length adjustment and selection of the subsequent radioactive particle stent 2, and lay a foundation for the subsequent accurate implantation. After the measurement is finished, the puncture needle is matched with the outer sheath 5 and taken out.

At this time, the balloon dilatation catheter insertion device 1, the radioactive particle stent 2 and the traction device 3 are integrally assembled, the radioactive particle stent 2 is sleeved on the inner end of the inner tube 12, and the traction wire 32 is inserted into the balloon 11, the outer tube 13 and the outer tube 13. Pulling outside traction wire 32, constitute tubaeform compression gum cover 31 by the silica gel material and can slowly compress and get into sacculus 11, tubaeform compression gum cover 31 gets into the sacculus completely after, and inside the outer tube of the interior end department of tubaeform compression gum cover 31 is radioactive particle support 2, and radioactive particle support 2 overlaps again on inner tube 12, and the form of this kind of multilayer parcel is favorable to radioactive particle support 2 to stabilize fixed the removal, prevents to remove the displacement of cancer embolus in-process. After the assembly is finished, the stent is pushed into a portal vein cancer embolus along a guide wire, and radiopaque marker coating marks are arranged at two ends of the radioactive particle stent at the inner end of the inner tube 12 and are developed under the action of contrast agents. When the cancer embolus position is reached, the pulling wire 32 is pulled to enable the outer tube at the inner end of the trumpet-shaped compression rubber sleeve 31 to continue to be completely contracted towards the balloon 11 along the outer tube 13, the radioactive particle stent 2 is exposed in the blood vessel, and the memory metal expands due to the high temperature of the focus of the blood vessel, so that the blood vessel is supported and expanded. The balloon 11 is marked with a radiopaque marker coating, the imaging is carried out in the blood vessel under the action of contrast agent, the outer tube 13 is pushed slowly to enable the space between the balloon 11 and the radioactive particle stent 2, a pressure pump is connected to the far end of the outer tube 13 to enable the balloon to be expanded, the radioactive particle stent 2 is further expanded, and the placement of the fixed radioactive particle stent is completed.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. A portal stent placement assembly for immobilizing radioactive particles, comprising: a balloon dilatation catheter imbedding device (1), a radioactive particle stent (2), a traction device (3), a guide wire (4), a puncture needle (6) and an outer sheath (5) matched with the puncture needle;

the balloon dilatation catheter implanting device (1) comprises an outer tube (13), an inner tube (12) and a balloon (11), wherein the outer tube (13) is sleeved on the inner tube (12), the near end of the outer tube is connected with an expansion balloon (11), the far end of the outer tube can be connected with a pressure pump, the balloon (11) is inflated to expand the balloon (11), and the balloon (11) is provided with a radiopaque marker coating mark; the front end of the inner tube (12) is fixed with a radioactive particle bracket (2), and the inner tube at the fixed position of the radioactive particle bracket is marked by a radiopaque marker coating; the traction device (3) consists of a silica gel horn-shaped compression rubber sleeve (31), a soft traction wire (32) and an outer tube at the inner end of the horn-shaped compression rubber sleeve, and the horn-shaped compression rubber sleeve (31) is opened towards the near end; the puncture needle matching outer sheath (5) is a rigid structure sleeved on the puncture needle (6), and the puncture needle (6) and the puncture needle matching outer sheath inner tube (51) are matched properly.

2. A portal vein stent placement assembly for immobilizing radioactive particles as recited in claim 1, wherein: the helical tip of the guide wire (4) is marked with a radiopaque marker coating (41) which can measure the length of the cancer embolus so as to accurately adjust the length of the radioactive particle strip.

3. A portal vein stent placement assembly for immobilizing radioactive particles as recited in claim 1, wherein: the radioactive particle tube (21) is of a memory alloy tubular structure, two ends of the radioactive particle tube are sealed, radioactive particle strips are filled in the radioactive particle tube and are fixed on the radioactive particle support (2) in a spiral mode, and the rigid portion of the support is formed by a nickel-chromium memory alloy tubular structure and can expand due to temperature rise.

4. A portal vein stent placement assembly for immobilizing radioactive particles as recited in claim 1, wherein: the traction device (3) can fix the radioactive particle support (2) to ensure that the radioactive particle support (2) is accurately placed in a cancer embolus position and does not displace before; the soft traction wire (32) can pull the horn-shaped compression rubber sleeve (31) to slowly compress into the outer tube balloon (11) of the balloon dilatation catheter imbedding device, so that the outer tube (13) is tightly sleeved on the inner tube (12) to fix the support.

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