CN209865057U - Medical non-vascular coated particle pocket position-selecting radiotherapy stent - Google Patents

Abstract

The utility model discloses a medical non-blood vessel tectorial membrane particle pocket selects a position radiotherapy support, including the tubulose skeleton to and the inside and outside tectorial membrane of skeleton bonds into an organic whole double-deck membrane pipe, bonds one deck pocket membrane on outer membrane pipe, and the surface interval forms the ascending rectangular type particle pocket of a plurality of openings. The utility model discloses the support outside is from taking the particle pocket, and is safe in utilization effective, plays to narrow, the stifled debility pertinence treatment of canceration district, easily the later stage takes out, can select new treatment to the middle and late stage cancer patient who loses the operation chance and unwilling to accept outer radiotherapy again.

Description

Medical non-vascular coated particle pocket position-selecting radiotherapy stent

Technical Field

The utility model relates to a medical auxiliary equipment field, more specifically say, it relates to a medical non-blood vessel tectorial membrane particle pocket selects a position radiotherapy support.

Background

Medical stents have been widely used, mainly for opening stenosis, blocking paralysis, local administration, and the like, in order to make the lumen unobstructed. The current medical stent is basically used in a single trachea or two adjacent tracheas, such as an esophagus, a trachea, an esophagus and a stomach, a gastrointestinal tract, an intestinal tract, a urethra, a biliary tract and the like. For some patients, when local canceration of esophagus or trachea occurs, the cavity is narrowed and blocked, for this reason, doctors mostly adopt first range radiotherapy and then select medical supports to open the cavity, but the range radiotherapy kills cancer cells and large area normal cells, and during the radiotherapy, patients are painful, and some patients are unwilling to accept external radiotherapy treatment methods.

Therefore, there is a medical treatment method to set the position for adding the radioactive particles on the stent in a way to accurately place the radioactive particles in the lesion, so as to realize the small-range targeted radiotherapy. As disclosed in the published patent application (patent publication No. CN 101695458A, CN 107569766A), the first method comprises sticking or sewing a strip-shaped radioactive particle loading capsule on the outer surface of an outer stent braided into a mesh framework structure with nitinol wires; the second method is to weave the stent body by an open alloy tube wire, and the radioactive particles are placed in the alloy tube wire. The two stents are both of a net-shaped stent structure, and are placed in the cavity channel for a period of time, the new granulation tissue can grow into the stent to form restenosis, and the body tissue is interwoven with the stent, so that the stent and the radioactive particles cannot be taken out at the later stage; and the reticular stent has larger deformation, the radioactive particles are arranged at a certain position on the stent when in vitro, and the stent reaches the position of the cavity channel to expand and support, so that the position difference between the stent and a lesion area is difficult to avoid.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to provide a medical non-vascular coated particle pocket position-selecting radiotherapy bracket for solving the problems, the full coated bracket prevents the new granulation tissue from penetrating into the framework to grow, prevents the cavity from being narrowed again, and is convenient for taking out the bracket in the later period; meanwhile, the particle pocket is a membrane pocket adhered to the outer layer of the membrane tube, radioactive particles are placed according to the position of a lesion area, and the bracket is placed to a proper position of a cavity for accurate targeted radiotherapy.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a medical non-vascular coated particle pocket position-selecting radiotherapy stent comprises a tubular framework and a double-layer membrane tube, wherein the framework is internally and externally coated with a membrane which is adhered into a whole, a layer of pocket membrane is adhered to the outer-layer membrane tube, and a plurality of strip-shaped particle pockets with upward openings are formed at intervals on the surface.

The utility model discloses further improve technical scheme be, the skeleton comprises network structure by the wire with the line of assisting, and network structure is, and the wire is bent into continuous "V" style of calligraphy and is looped over again the cyclization, and the tubulose is arranged to many group rings from top to bottom, and the reuse is assisted the line and is connected the formation wholly with the middle top bending point of two "V" type units of lower group ring "V" type unit bottom bending portion of last group ring, and the line connection is assisted on "V" type unit top of top ring, and the line connection is assisted to the "V" type unit bottom of end links at the bottom. The auxiliary connecting wire connects the metal wires into a framework, the compressibility and the support performance after expansion are very good, and the auxiliary connecting wire effectively tightens the metal wire framework to enable the metal wire framework to be matched with the size of the position of the membrane tube.

The utility model discloses further improve technical scheme and be, go up and organize ring every "V" type unit bottom and be located down and organize ring every "V" type unit in the middle of forming dislocation structure. The whole structure is more stable.

The utility model has the technical proposal that the bottom end of the upper group ring and the top end of the lower group ring are separated by a certain distance, and the auxiliary connecting line connects the upper group ring and the lower group ring in a continuous V shape; or the bottom end of the upper group ring and the top end of the lower group ring are positioned on the same horizontal line, and the auxiliary connecting line connects the upper group ring and the lower group ring in a straight line shape; or the bottom end of the upper group of rings and the top end of the lower group of rings are sleeved and staggered, and the auxiliary connecting line connects the upper group of rings and the lower group of rings in a continuous V shape.

The utility model discloses the technical scheme that further improves again is, establishes a particle pocket respectively in the middle of each "V" type cell structure of every group ring and the "V" type structure of falling that forms between two "V" type units. The number of the particle pockets is set to be more and regular, so that the particle pockets can be conveniently placed in a position selection mode.

The utility model discloses further improve technical scheme again and be, the particle pocket degree of depth is greater than particle length, and its upper shed forms the mouth that tightens up that the width is less than lower part particle parking position pocket width. Effectively preventing the radioactive particles from falling out.

The utility model discloses the further improvement technical scheme is again, the membrane pipe middle part is the cylinder of constant diameter, and both ends mouth outwards opens and is the horn type, perhaps both ends mouth outwards opens and is the horn type after, and limit portion inwards hunches again and forms similar mushroom. The trumpet-shaped openings or the mushroom-shaped openings at the two ends play roles in fixing and preventing tissues from growing into the bracket from the two ends.

The utility model discloses further improve technical scheme again and be, the membrane skirt is prevented backflowing in the one end connection of membrane pipe, and the diameter of membrane skirt is greater than membrane pipe middle part diameter, and membrane skirt upper end inserts in the membrane pipe bell mouth rather than bonding. The membrane skirt has the similar function as the cardia, when one person loses the function, the cardia can not control regurgitation, and the membrane skirt replaces the cardia to prevent regurgitation.

The utility model discloses further improve technical scheme again and be, two bisymmetry of membrane pipe upper portion circumference round is equipped with four barbs, and barb the inner passes outer membrane and connects on the skeleton. The barbs function to stabilize the stent and prevent migration of the stent.

The utility model discloses the technical scheme that improves is again, and the line is assisted with the top of skeleton top ring to connect into the line of retrieving with interior anchor ring in the membrane pipe is last mouthful. When the bracket and the radioactive particles need to be taken out in the later period, the operation is convenient only by pulling out the recovery wire.

The utility model discloses beneficial effect:

one, the utility model discloses the particle pocket is taken certainly to the support outside, selects the accurate position in lesion area to place the particle, and the intracavity is put into to the support, realizes accurate "target radiotherapy".

Second, the utility model discloses the support adopts full tectorial membrane structure, can prevent that the granulation tissue of newborn from to support ingrowth, effectively prevents to narrow once more, simultaneously in order to realize the support in later stage and taking out of radiation particle.

And thirdly, the upper part of the bracket is provided with an anti-skid barb, so that the effects of stabilizing the bracket and preventing displacement are achieved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view.

Detailed Description

As shown in figure 1, the utility model comprises a tubular framework and a double-layer membrane tube 1 which is formed by bonding an inner membrane and an outer membrane of the framework into a whole, wherein the framework is of a net structure formed by a metal wire 4 and an auxiliary connecting wire 5, the net structure is that the metal wire 4 is bent into a continuous V shape and then is looped into a ring, the bottom end of each V-shaped unit of an upper group ring is positioned in the middle of each V-shaped unit of a lower group ring to form a staggered structure, the upper group ring and the lower group ring are arranged into a tube shape, the bent part at the bottom end of the V-shaped unit of the upper group ring is connected with the bent point at the middle top end of the two V-shaped units of the lower group ring by an auxiliary connecting wire (5) to form a whole, the bottom end of the upper group ring and the top end of the lower group ring are positioned on the same horizontal line, the auxiliary connecting wire connects the upper group ring and the lower group ring by a straight line, the top end of the V-shaped unit, a layer of bag film is adhered on the outer layer film tube, a strip-shaped particle bag 2 with an upward opening is respectively formed in the middle of each V-shaped unit structure of each group of rings and the middle of an inverted V-shaped structure formed between two V-shaped units, the depth of the particle bag 2 is larger than the length of particles, the particle bag 2 can be 7-9 mm, the diameter is 0.6-1.2 mm, and a tightening opening with the width smaller than the bag width of a particle storage position at the lower part is formed in the upper opening of the particle bag.

The middle part of the membrane tube 1 is in a cylindrical shape with equal diameter, two ports are outwards opened to form a horn shape, the bottom end of the membrane tube 1 is connected with an anti-backflow membrane skirt, the diameter of the membrane skirt is larger than that of the middle part of the membrane tube, and the upper end of the membrane skirt is inserted into the horn mouth of the membrane tube to be bonded with the horn mouth of the membrane tube.

The circumference of the upper part of the membrane tube 1 is provided with four barbs 3 in a circle which are symmetrical in pairs, and the inner ends of the barbs 3 penetrate through the outer membrane to be connected to the framework.

And an inner ring line is used in the upper opening of the membrane tube 1 to connect the top end auxiliary connecting line 5 of the ring at the uppermost part of the framework into a recovery line 7.

The framework metal wire in the utility model is an implantable metal wire such as a stainless steel wire or a shape memory alloy wire; the auxiliary connecting line is a non-metal line, such as a nylon line; the membrane tube, the membrane skirt and the bag membrane are made of flexible high polymer materials, such as one of medical silicon rubber, a polytetrafluoroethylene membrane, a polyurethane membrane or a polyamide membrane.

During production, an inner layer film of a film tube is firstly coated on a cylindrical die, a framework woven by metal wires and auxiliary connecting wires is sleeved on the cylindrical die (barbs are connected on the framework), the auxiliary connecting wires are tightened to tighten a metal wire frame to reach a preset size, glue is coated, an outer layer film is adhered on the framework, the outer layer film is coated with the glue and adhered with a bag film, and a long strip-shaped particle bag with an upward opening is respectively arranged between each V-shaped unit structure of each group of rings of the framework and between the inverted V-shaped structures formed between the two V-shaped units. Furthermore, a recovery wire is threaded in the membrane tube, and one end of the membrane tube is adhered with a membrane skirt.

Before the stent is implanted into a human body, proper positions are selected from particle bags bonded on the outer layer of the membrane tube to place radiation particles, after the stent is implanted into the human body, the metal wire frameworks at the two ends expand the lumen, the two ends of the membrane tube are propped open by the metal wire frameworks, when gas or liquid passes through, the stent is smooth, and the placed radiation particles are tightly attached to a cancerous region to perform radiotherapy.

Example 2

The bottom of the upper ring set is spaced from the top of the lower ring set by a distance, and the auxiliary connecting line connects the upper ring set with the lower ring set in a continuous V-shape, and the rest is as in example 1.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, the particle pocket is adhered to the outer layer of the membrane tube without departing from the principles of the present invention, and the protection scope of the present invention shall be considered.

Claims (10)

1. Medical non-vascular tectorial membrane particle pocket selects a position radiotherapy support, including tubulose skeleton to and the inside and outside tectorial membrane of skeleton bonds double-deck membrane pipe (1) as an organic whole, its characterized in that: a layer of pocket film is adhered on the outer layer film tube, and a plurality of strip-shaped particle pockets (2) with upward openings are formed at intervals on the surface.

2. The medical non-vascular coated particle pocket selective radiotherapy stent of claim 1, which is characterized in that: the framework is of a net structure formed by metal wires (4) and auxiliary connecting lines (5), the metal wires (4) are bent into continuous V-shaped shapes and then are looped to form a ring, the upper group of rings and the lower group of rings are arranged into a tubular shape, the bent parts at the bottom ends of the V-shaped units of the upper group of rings are connected with the bent points at the top ends of the middles of the two V-shaped units of the lower group of rings by the auxiliary connecting lines (5) to form a whole, the top ends of the V-shaped units of the uppermost ring are connected by the auxiliary connecting lines, and the bottom ends of the V-shaped units of the bottommost ring are connected by the auxiliary connecting lines.

3. The medical non-vascular coated particle pocket selective radiotherapy stent of claim 2, which is characterized in that: the bottom end of each V-shaped unit of the upper group of rings is positioned in the middle of each V-shaped unit of the lower group of rings to form a staggered structure.

4. The medical non-vascular coated particle pocket selective radiotherapy stent of claim 3, which is characterized in that: the bottom end of the upper group ring is separated from the top end of the lower group ring by a certain distance, and the auxiliary connecting line connects the upper group ring with the lower group ring in a continuous V shape; or the bottom end of the upper group ring and the top end of the lower group ring are positioned on the same horizontal line, and the auxiliary connecting line connects the upper group ring and the lower group ring in a straight line shape; or the bottom end of the upper group of rings and the top end of the lower group of rings are sleeved and staggered, and the auxiliary connecting line connects the upper group of rings and the lower group of rings in a continuous V shape.

5. The medical non-vascular coated particle pocket selective radiotherapy stent of claim 2, which is characterized in that: the middle of each V-shaped unit structure of each group of rings and the middle of an inverted V-shaped structure formed between two V-shaped units are respectively provided with a particle pocket (2).

6. The medical non-vascular coated particle pocket position-selecting radiotherapy stent as claimed in claim 1 or 5, characterized in that: the depth of the particle pocket (2) is larger than the length of the particles, and the upper opening of the particle pocket forms a tightening opening with the width smaller than the pocket width of the particle storage position at the lower part.

7. The medical non-vascular coated particle pocket selective radiotherapy stent of claim 1, which is characterized in that: the middle part of the membrane tube (1) is in a cylinder shape with equal diameter, two ports are outwards opened to form a horn shape, or after the two ports are outwards opened to form the horn shape, the edge part is inwards arched to form a mushroom shape.

8. The medical non-vascular coated particle pocket selective radiotherapy stent of claim 7, which is characterized in that: one end of the membrane tube (1) is connected with the anti-backflow membrane skirt, the diameter of the membrane skirt is larger than the diameter of the middle part of the membrane tube, and the upper end of the membrane skirt is inserted into the bell mouth of the membrane tube to be bonded with the bell mouth.

9. The medical non-vascular coated particle pocket selective radiotherapy stent of claim 1, which is characterized in that: two bisymmetry of membrane pipe (1) upper portion circumference round is equipped with four barbs (3), and barb (3) inner passes outer membrane and connects on the skeleton.

10. The medical non-vascular coated particle pocket selective radiotherapy stent of claim 2, which is characterized in that: the top end auxiliary connecting line (5) of the ring at the top of the framework is connected into a recycling line (7) by an inner ring line in the upper opening of the membrane tube (1).