WO2013097261A1 - Nasal sinus stent and special placement device therefor - Google Patents

Abstract

Disclosed are a nasal sinus stent and a special placement device therefor. The nasal sinus stent has a cylindrical body (1), and the cylinder wall of the cylindrical body (1) is a mesh structure made of an elastic material. The placement device comprises a control handle (2) having provided on the side whereof a slot hole; a slide handle (3) is provided in the slot hole, and the free end of the slide handle (3) located within the control handle (2) is connected with a flexible sleeve (4), while the free end of the flexible sleeve (4) extends to the exterior surface of the control handle (2); a flexible inner pipe (5) is movably fitted in the flexible sleeve (4), with one end of the flexible inner pipe (5) passing through the control handle (2) and thus being in communication with the exterior, and with the other end of the flexible inner pipe (5) being combined with the flexible sleeve (4) to form an accommodation cavity (6) for holding the compressed nasal sinus stent. The nasal sinus stent has a simple structure and good usage results, and the special placement device of the nasal sinus stent is structurally compact and operationally simple and convenient.

Description

 Description Sinus stent and its special delivery device

 The present invention relates to an auxiliary instrument for sinus expansion, and more particularly to a sinus stent. The invention also relates to a dedicated delivery device for the sinus stent described above.

Background technique

 After balloon sinus surgery for sinusitis, after a period of time, some patients have symptoms of sinus stenosis, affecting the drainage of the sinus cavity, leading to recurrence of the disease, affecting the curative effect, thus requiring a second operation. At the same time, in order to avoid the above symptoms, the patient needs to be reviewed repeatedly, which not only increases the iatrogenic creation, but also increases the suffering of the patient and aggravates the economic burden of the patient.

Summary of the invention

 A former object of the present invention is to provide a sinus stent which is simple in structure and effective in use.

 A further object of the present invention is to provide a special delivery device for a sinus stent which is compact in structure and simple in operation. The former technical solution of the present invention is realized as follows: a sinus stent, the stent is a cylindrical body, and the cylindrical wall of the cylindrical body is a mesh structure made of an elastic material; the outer diameter of the cylindrical body is 4~ 15mm, the length of the cylindrical body is 6~

20 "

 In the above sinus stent, the cylindrical body is composed of a support portion and a positioning portion disposed at two ends of the support portion, and the support portion and the positioning portion are integrally formed as a whole; the outer diameter of the support portion is 5 to 10, 5毫米。 The diameter of the diameter of 0. 05~0. 5ram. The diameter of the wire is 0. 05~0. 5ram.

In the above sinus stent, the mesh structure has a mesh size of 1 mm ^{2 to} 9 mm ² .

 After adopting the above structure, the sinus stent of the mesh structure can effectively support the sinus ostium after balloon expansion, and prevent the symptoms of re-stenosis of the sinus mouth, thereby rapidly and effectively treating sinusitis and achieving the desired effect. There is no need to repeat the review several times, which not only reduces the suffering of the patient, but also saves the patient's expenses.

 The latter technical solution of the present invention is implemented as follows: a special delivery device for a sinus stent, comprising a control handle, wherein the control handle has a long hole in a side wall thereof, and a sliding handle is arranged in the long hole, the sliding The free end of the handle is connected with a flexible outer sleeve, the free end of the flexible outer sleeve extends outside the control handle; the flexible outer sleeve is provided with a flexible inner tube, and one end of the flexible inner tube passes through the control handle and is external In the same manner, the other end of the flexible inner tube cooperates with the flexible outer sleeve to form a placement cavity for placing the compressed sinus stent.

In the above-mentioned special delivery device for sinus stent, the flexible end of the flexible inner tube is provided with a flexible guiding head, a flexible guiding head The description is located on the outside of the flexible outer casing and the outer diameter of the flexible guide head is adapted to the outer diameter of the flexible outer casing, and the flexible guide head (7) is provided with an axial through hole communicating with the flexible inner tube (5).

 In the above-mentioned special delivery device for sinus stents, the outer wall of the flexible inner tube on the rear side of the flexible guide head is provided with an annular groove in the circumferential direction, and the placement cavity is formed by the annular groove and the flexible outer sleeve.

 In the above-mentioned special delivery device for sinus stents, the side wall of the control handle is provided with a wire joint communicating with the outside, and one end of the flexible inner tube contacting the control handle is connected with the wire guide.

 After adopting the above structure, the present invention uses the guide wire used in the sinus balloon expansion to find the position of the sinus, and through the cooperation of the flexible inner tube and the flexible outer sleeve, the sinus stent is transported to the sinus mouth under the control of the control handle, and passes The sliding handle controls the movement of the flexible outer sleeve to release the sinus stent, so that the sinus stent naturally expands and abuts against the sinus wall, thereby completing the expansion support of the sinus ostium. The use of sinus rest and stenosis may occur after two years of balloon dilatation. If the sinus stent is used, the time for narrowing the sinus can be more than doubled.

DRAWINGS

 The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings, but no limitation of the invention.

 1 is a schematic structural view of Embodiment 1 of a sinus stent according to the present invention;

 Figure 2 is a cross-sectional view taken along line AA of Figure 1;

 Figure 3 is a schematic view showing the structure of the sinus stent of the present invention;

 Figure 4 is a cross-sectional view of Figure 3 at BB;

 Figure 5 is a schematic structural view of a conveying device of the present invention;

 Figure 6 is a schematic view showing the structure of the delivery device of the present invention after placing the sinus stent;

 Figure 7 is a partial enlarged view of the portion C in Figure 5;

 Figure 8 is a partial enlarged view of the portion D in Figure 6;

 Figure 9 is a schematic view showing the structure of the delivery device of the present invention when releasing the sinus stent;

 Figure 10 is a schematic view showing the structure of the delivery device of the present invention after releasing the sinus stent.

 In the figure: cylindrical body 1, support part la, positioning part lb, control handle 2, sliding handle 3, flexible outer sleeve 4, flexible inner tube 5, placement cavity 6, flexible guide head 7, guide wire joint 8.

detailed description

 Example 1

Referring to Figures 1 and 2, a sinus stent of the present invention, the stent is a cylindrical body 1, the cylinder wall of which is a mesh structure made of an elastic material; the outer diameter of the cylindrical body 1 is 4 to 15 mm, the length of the cylindrical body 1 is 6 to 20 mm. 5〜 The diameter of the wire is 0. 05~ Instruction manual

0. 5mm. 2毫米两个。 Two paintings and 0. 2mm two. Meanwhile, the mesh size of the mesh structure is 1 mm ^{2 to} 9 mm ² .

 Referring to FIG. 5 and FIG. 7 , a special delivery device for a sinus stent of the present invention comprises an elongated control handle 2, and a long hole is arranged along the length direction on the side wall of the control handle 2, and is arranged in the long hole. There is a sliding handle 3, and the free end of the sliding handle 3 in the control handle 2 is connected with a flexible outer sleeve 4, the free end of the flexible outer sleeve 4 extends outside the control handle 2; and the flexible inner sleeve 5 is provided with a flexible inner tube 5 The flexible inner tube 5 end passes through the control handle 2 and communicates with the outside, and the other end of the flexible inner tube 5 cooperates with the flexible outer sleeve 4 to form a placement cavity 6 for placing the compressed sinus support. In the present embodiment, an annular groove is circumferentially provided on the outer wall of the flexible inner tube 5 on the rear side of the flexible guide head 7, and the placement chamber 6 is formed by the annular groove and the flexible outer sleeve 4. Meanwhile, in order to facilitate the movement of the flexible outer sleeve 4 and the flexible inner tube 5, a flexible flexible guide head 7 is provided at the free end of the flexible inner tube 5, and the flexible guide head 7 is located outside the flexible outer sleeve 4 and outside the flexible guide head 7. The diameter is adapted to the outer diameter of the flexible outer sleeve 4, and the flexible guide head 7 is provided with an axial through hole communicating with the flexible inner tube 5. Further, a guide wire joint 8 communicating with the outside is provided on the side wall of the control handle 2, and one end of the flexible inner tube 5 in contact with the control handle 2 is connected to the wire guide 8. The guide wire connector 8 is provided with a tapered inner hole, and a guide wire joint 8 having a tapered inner hole is used to facilitate the entry of the guide wire into the inner cavity of the flexible inner tube 5.

 Referring to Fig. 6 and Fig. 8 to Fig. 10, in specific use, according to the specific condition of the patient, an appropriate size of the sinus stent 1 is selected, and the sinus stent 1 is compressed and placed into the placement chamber 6. After the sinus balloon dilatation, the free end of the guide wire is inserted from the flexible guide head 7 and protrudes from the guide wire connector 8 by using the guide wire used in the operation, and the operator controls the flexibility by the control handle 2 The outer sleeve 4 and the flexible inner tube 5 are guided by the front flexible guide head 7, find the position of the sinus, and then extend into the sinus cavity. After confirming that the sinus stent is located at the sinus ostium under the endoscope, manually push the control handle 2 The sliding handle 3 moves the flexible outer sleeve 4 to the proximal end to expose the placement cavity 6, thereby releasing the sinus stent, and the released sinus stent naturally expands to abut the sinus wall; then dragging the control handle along the guide wire 2 Thereby the flexible outer sleeve 4 and the flexible inner tube 5 are taken out to complete the operation. Two years after the usual balloon dilatation, sinus restenosis may occur, and if the sinus stent of the present invention is used, the time for re-stenosis may be more than doubled.

 Example 2

 Referring to FIG. 3 and FIG. 4, a sinus stent of the present invention has the same structure as that of Embodiment 1, except that the cylindrical body 1 is composed of a support portion 1a and a positioning portion lb disposed at both ends of the support portion 1a. The support portion 1a and the positioning portion 1b are integrally formed; the outer diameter of the support portion 1a is 5 to 10, and the outer diameter of the positioning portion 1b is 6 to 14 nm. This structure can make the sinus stent less prone to displacement in the sinus ostium, and the time for re-stenosis of the sinus ostium can be further prolonged. The method of use and positioning is the same as that of the first embodiment.

Claims

Claim A sinus stent, characterized in that the stent is a cylindrical body (1), the cylindrical wall of the cylindrical body (1) is a mesh structure made of an elastic material; the outer diameter of the cylindrical body (1) The length of the cylindrical body (1) is 4 to 15 nim, which is 4 to 15 nm.  2. The sinus stent according to claim 1, wherein the cylindrical body (1) is composed of a support portion (1a) and a positioning portion (lb) disposed at both ends of the support portion (1a), the support portion ( La) an integral structure integrally formed with the positioning portion (lb); the outer diameter of the support portion (1a) is 5 to 10 mni, and the outer diameter of the positioning portion (lb) is 6 to 14 mra.  5 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。. 4. The sinus stent according to claim 1, wherein the mesh structure has a mesh size of 1 mm ² to 9 awake ² .  A special delivery device for a sinus stent, comprising a control handle (2), wherein the control handle (2) has a long hole in a side wall thereof, and a sliding handle (3) is arranged in the long hole. The free end of the slider (3) in the control handle (2) is connected with a flexible outer sleeve (4), the free end of the flexible outer sleeve (4) extends outside the control handle (2); the movable sleeve in the flexible outer sleeve (4) A flexible inner tube (5) is provided, the end of the flexible inner tube (5) passing through the control handle (2) and communicating with the outside, and the other end of the flexible inner portion (5) is formed with the flexible outer sleeve (4) A placement chamber (6) for placing the compressed sinus stent.  6. The special delivery device for sinus stent according to claim 5, characterized in that: the flexible end of the flexible inner tube (5) is provided with a flexible guiding head (7), and the flexible guiding head (7) is located in a flexible outer casing (4) The outer diameter of the outer flexible guide head (7) is adapted to the outer diameter of the flexible outer casing (4); the flexible guide head (7) is provided with an axial through hole communicating with the flexible inner tube (5).  The special delivery device for sinus stent according to claim 6, wherein an outer annular wall of the flexible inner tube (5) on the rear side of the flexible guiding head (7) is provided with an annular groove in a circumferential direction, the placing The cavity (6) is formed by a combination of an annular groove and a flexible outer casing (4).  The special delivery device for a sinus stent according to claim 7, wherein a side of the control handle (2) is provided with a wire guide (8) communicating with the outside, and the flexible inner tube (4) The end that is in contact with the control handle (2) is connected to the wire guide (8).  9. The sinus stent-specific delivery device according to claim 8, wherein the guide wire connector (8) is provided with a tapered inner hole.