CN117442845A - Pinch-open tearable vascular sheath - Google Patents

Abstract

The invention discloses a pinching type tearable vascular sheath, which comprises a tearable sheath assembly and an expansion tube assembly, wherein the tearable sheath assembly comprises a sheath tube body and a sheath seat, one end of the sheath seat is connected with one end of the sheath tube body, the sheath seat is a pinching type sheath seat, the sheath seat comprises a first sheath wing and a second sheath wing, the first sheath wing and the second sheath wing are L-shaped, a tearing seam is arranged on the sheath seat, a supporting point is arranged at the tearing seam, and the two supporting points are oppositely arranged. According to the invention, the convex points on the two sides of the tearing seam are used as supporting points, so that the lever effect is achieved, and the tearable outer sheath assembly is torn along the tearing seam, so that the effort can be reduced; because the pinching and opening force mode is different from the pinching and opening mode, the pinching and opening can easily control the movement of fingers, so that the movement amplitude is smaller than the tearing movement amplitude, especially when the vascular sheath is in the neck, the collarbone and the like for access, the operation is more convenient, and the injury to a patient can be avoided.

Description

Pinch-open tearable vascular sheath

Technical Field

The invention relates to the technical field of medical appliances, in particular to a pinching-open type tearable vascular sheath.

Background

The tearable vascular sheath is an interventional surgical instrument and is mainly used for treating vascular sheaths formed after arterial interventional operation. One of the characteristics of the tearable vascular sheath is its tear-off design. The tearable vascular sheath is generally composed of two parts: an outer sheath and an inner sheath (dilation tube). The outer sheath is a larger tubular structure for tearing the vascular sheath. The inner sheath is a small tubular structure for guiding and protecting the blood vessel. The two parts can be flexibly combined together to adapt to different surgical requirements.

However, the existing tearable vascular sheath is mostly operated by pulling the sheath wings or handles on both sides of the vascular sheath, and the tearing direction of the outer sheath is to apply force from both wings of the outer sheath to the direction of the patient, so that both wings of the outer sheath tear open the outer sheath body, and then apply force to both sides to tear the outer sheath body completely. When the vascular sheath is used for access in the neck, the collarbone and the like in the tearing mode, the force direction and the finger movement amplitude are unfavorable for the operation and clinical use of doctors due to the blockage of the human body.

Disclosure of Invention

Therefore, an object of the present invention is to provide a pinch-open tearable vascular sheath, which solves the problems mentioned in the background art and overcomes the drawbacks of the prior art.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides a pinch-open can tear vascular sheath, but includes tear sheath subassembly and expansion pipe subassembly, can tear sheath subassembly and include sheath body and sheath seat, the one end of sheath seat with the one end of sheath body links to each other, the sheath seat is for pinching open sheath seat, the sheath seat includes first sheath wing and second sheath wing, first sheath wing with the second sheath wing is L shape, just first sheath wing with the second sheath wing is axisymmetric, be equipped with the tear seam on the sheath seat, the tear seam is followed the axial setting of sheath seat just the tear seam will the sheath seat divides equally, first sheath wing with the second sheath wing is in tear seam department is equipped with the back point, just the back point of first sheath wing with the back point position of second sheath wing sets up relatively.

Preferably, the shape of the supporting point is isosceles trapezoid, and the shorter bottom edges of the two supporting points are opposite.

Preferably, the first outer sheath wing and the second outer sheath wing are provided with a plurality of anti-slip grooves.

Preferably, the sheath seat further comprises a valve cover, the valve cover is hollow and cylindrical, a plurality of protrusions are arranged on the outer surface of one end of the sheath seat, clamping grooves corresponding to the protrusions are formed in the side face of the valve cover, and the protrusions can be just clamped in the clamping grooves.

Preferably, the front end face of the valve cover is provided with a protruding block, and grooves are formed in the periphery of the protruding block.

Preferably, the expansion pipe assembly comprises an expansion pipe body and an expansion pipe seat, the expansion pipe body is connected with the expansion pipe seat, expansion pipe arms are arranged on two sides of the expansion pipe seat, and a clamping block is arranged at one end, close to the expansion pipe body, of the expansion pipe arm.

Preferably, the end of the expansion pipe body is gradually thinned, and the head of the expansion pipe body is conical.

Preferably, the first sheath wing and the second sheath wing are connected together through the valve cover, and a space is reserved inside a connecting part of the first sheath wing and the second sheath wing.

Preferably, an extension tube connection hole is formed on one side of the first sheath wing or the second sheath wing, and penetrates through the first sheath wing or the second sheath wing and is communicated with the inner space of the joint of the first sheath wing and the second sheath wing.

Therefore, the invention has the following beneficial effects:

according to the pinch-open tearable vascular sheath, the convex points on the two sides of the tearing seam are used as the supporting points, so that the lever effect is achieved, and the tearable sheath assembly is torn along the tearing seam, so that the effort can be reduced; because the pinching and opening force mode is different from the pinching and opening mode, the pinching and opening can more easily control the movement of fingers, so that the movement amplitude is smaller than the tearing movement amplitude, especially when the vascular sheath is in the neck, the collarbone and the like for access, the operation is more convenient, and the injury to a patient can be avoided; the upper end of the tearing seam of the sheath seat is provided with a V-shaped notch, namely the length of the tearing line is reduced, and the tearing seam is made to be a weak point, so that the tearing seam is easier to tear; the shoulders of the two wings of the outer sheath are provided with anti-slip grooves, so that a doctor can hold and tear the outer sheath body conveniently. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of the overall construction of a tearable vascular sheath of the present invention;

FIG. 2 is a schematic illustration of the construction of the tearable sheath assembly of the present invention;

FIG. 3 is a schematic view of the overall structure of the sheath hub of the present invention;

FIG. 4 is an exploded view of the sheath seat portion of the present invention;

FIG. 5 is a front view of the sheath hub of the present invention;

FIG. 6 is a schematic view of the sheath hub connection sheath tube of the present invention;

FIG. 7 is a partial cross-sectional view of a valve cover of the present invention;

FIG. 8 is a schematic illustration of the stent assembly of the present invention;

FIG. 9 is a schematic view of the overall structure of the expansion tube base of the present invention;

FIG. 10 is a top view of an expansion tube socket of the present invention;

FIG. 11 is a schematic illustration of the connection of the stent holder and the stent body of the present invention.

In the figure: 1. an outer sheath seat; 2. expanding the tube seat; 3. an outer sheath tube; 4. expanding the tube body; 5. an extension tube; 6. a three-way valve; 7. a primary sheath wing; 8. a second outer sheath wing; 9. a valve cover; 10. a protruding block; 11. tearing the crack; 12. a hemostatic valve; 13. a valve pad; 14. a clamping groove; 15. a protrusion; 16. a groove; 17. a support point; 18. v-shaped notch; 19. expanding the tube arm; 20. a clamping block; 21. expanding the pipe hole; 23. an insert; 24. an anti-slip groove.

Detailed Description

Embodiments of the present invention 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 and intended to explain the present invention and should not be construed as limiting the invention.

As shown in fig. 1, a pinching-type tearable vascular sheath comprises a tearable sheath component and an expansion tube component, as shown in fig. 2, the tearable sheath component comprises a sheath tube body 3 and a sheath holder 1, one end of the sheath holder 1 is connected with one end of the sheath tube body 3, as shown in fig. 3, 4 and 5, the sheath holder 1 is a pinching-type sheath holder 1, the sheath holder 1 comprises a first sheath wing 7 and a second sheath wing 8, the first sheath wing 7 and the second sheath wing 8 are all in an L shape, the first sheath wing 7 and the second sheath wing 8 are axisymmetric, a tearing slit 11 is formed in the sheath holder 1, the tearing slit 11 is formed along the axial direction of the sheath holder 1 and equally divides the sheath holder 1, a supporting point 17 is formed at the tearing slit 11 between the first sheath wing 7 and the second sheath wing 8, and the supporting point 17 of the first sheath wing 7 and the supporting point 17 of the second sheath wing 8 are oppositely arranged.

According to the pinch-open tearable vascular sheath, the convex points on the two sides of the tearing seam 11 are used as the supporting points 17, so that a lever effect is achieved, and the tearable outer sheath assembly is torn along the tearing seam 11, so that the effort can be reduced; because the pinching and opening force mode is different from the pinching and opening mode, the pinching and opening can more easily control the movement of fingers, so that the movement amplitude is smaller than the tearing movement amplitude, especially when the vascular sheath is in the neck, the collarbone and the like for access, the operation is more convenient, and the injury to a patient can be avoided; the upper end of the tearing seam 11 of the sheath seat 1 is provided with a V-shaped notch 18, namely the length of the tearing line is reduced, and the tearing seam 11 is made to be a weak point, so that the tearing seam 11 is easier to tear.

In one embodiment, as shown in fig. 5, the shape of the support points 17 is an isosceles trapezoid, and the shorter base sides of the two support points 17 are disposed opposite to each other.

In this embodiment, if the supporting point 17 is cut along one side of the tear seam 11, the shapes of the cut supporting points 17 are isosceles trapezoids, and the shorter bottom edges of the supporting points 17 of the first and second sheath wings 7 and 8 are opposite, in other words, the shapes and sizes of the two supporting points 17 are equal and opposite.

V-shaped notches 18 are formed on both sides of the first and second sheath wings 7 and 8.

In one embodiment, the first and second wings 7 and 8 are provided with a number of anti-slip grooves 24.

Specifically, as shown in fig. 3, 4 and 5, the anti-slip grooves 24 are provided at shoulders of both wings of the outer sheath, so that a doctor can grasp and tear the outer sheath tube 3.

In one embodiment, the sheath seat 1 further comprises a valve cover 9, the valve cover 9 is hollow and cylindrical, a plurality of protrusions 15 are arranged on the outer surface of one end of the sheath seat 1, clamping grooves 14 corresponding to the protrusions 15 are arranged on the side surface of the valve cover 9, and the protrusions 15 can be just clamped in the clamping grooves 14.

The valve cover 9 is similar to a bottle cap, and covers one end of the outer sheath base 1, except that the valve cover 9 is not connected with one end of the outer sheath base 1 through threads, but is matched and clamped with a protrusion 15 on the outer sheath base 1 through a clamping groove 14.

In one embodiment, as shown in fig. 5, the front end surface of the valve cover 9 is provided with a protruding block 10, and grooves 16 are formed around the protruding block 10.

The convex block 10 at the front end of the valve cover 9 is matched with the clamping block 20 at the front end of the expansion tube seat 2 to realize the clamping and fixing between the outer sheath seat 1 and the expansion tube seat 2.

In one embodiment, as shown in fig. 8, the expansion pipe assembly comprises an expansion pipe body 4 and an expansion pipe seat 2, the expansion pipe body 4 is connected with the expansion pipe seat 2, as shown in fig. 9 and 10, expansion pipe arms 19 are arranged on two sides of the expansion pipe seat 2, and a clamping block 20 is arranged on one end, close to the expansion pipe body 4, of the expansion pipe arms 19. The expansion pipe seat 2 is provided with an expansion pipe hole 21 for connecting the expansion pipe body 4.

As shown in fig. 10, the clamping block 20 at the front end position of the expansion pipe arm 19 is matched and clamped with the groove 16 of the convex block 10 at the front end of the valve cover 9 as shown in fig. 5 and 7.

In one embodiment, as shown in FIG. 8, the ends of the dilation tube 4 taper and the head of the dilation tube 4 is conical.

In one embodiment, the first sheath wing 7 and the second sheath wing 8 are connected together by a valve cap 9, and a space is left inside the connection of the first sheath wing 7 and the second sheath wing 8.

In one embodiment, the tearable vascular sheath further comprises a hemostatic valve 12, the other end of the outer sheath hub 1 is provided with a hemostatic valve 12, and the hemostatic valve 12 can be partially embedded in the inner space of the outer sheath hub 1.

The hemostatic valve 12 is arranged in the sheath seat 1, so that the hemostatic valve can prevent blood from flowing out after the vascular sheath is inserted into a human body, prevent excessive blood loss of a patient and avoid the risk of infection and thrombus of the patient.

As a specific embodiment, the hemostatic valve 12 may be an integrated hemostatic valve 12.

As a specific embodiment, the hemostatic valve 12 may be a split hemostatic valve 12.

In one embodiment, as shown in fig. 6, one end of the outer sheath hub 1 is connected to one end of the outer sheath tube 3 and one end of the outer sheath tube 3 is inserted into the outer sheath hub 1.

Compared with the structure that one end of the outer sheath tube body 3 is inserted into the outer sheath seat 1, compared with the structure that the end face of the outer sheath tube body 3 is partially exposed outside the two wings of the outer sheath, the problem that the outer sheath tube body 3 cannot be torn smoothly due to the phenomena of crush injury and scald of the outer sheath tube body 3 caused by problems of a die, temperature, dimensional tolerance and the like easily occurs during forming can be avoided.

In one embodiment, one side of the first sheath wing 7 or the second sheath wing 8 is provided with an extension tube 5 connecting hole, and the extension tube 5 connecting hole penetrates through the first sheath wing 7 or the second sheath wing 8 and is communicated with the inner space of the joint of the first sheath wing 7 and the second sheath wing 8.

In one embodiment, as shown in fig. 11, which is a partial cross-sectional view of the stent assembly, the connection mode of the stent tube body 4 and the stent tube seat 2 is shown, an insert 23 is provided inside, and the stent tube body 4 and the stent tube seat 2 are connected together through the press-fit process of the insert 23. Compared with the connection through the embedded part injection molding process, the production efficiency is higher, the injection molding defect is not easy to occur, the qualification rate is high, and the production is more facilitated.

In one embodiment, as shown in fig. 7, the valve cover 9 is further provided with a valve pad 13 inside, and the valve pad 13 is fitted with the hemostatic valve 12. Can closely attach the outer wall of the expansion pipe body 4 or the introduced medical instrument to prevent air and foreign matters in the air from entering the human body, and also can prevent blood from being carried out by the expansion pipe body 4 or the introduced medical instrument.

In one embodiment, as shown in fig. 1 and 2, the perfusion assembly further comprises a perfusion assembly, wherein the perfusion assembly comprises an extension tube 5 and a three-way valve 6, one end of the extension tube 5 is connected with the side surface of the outer sheath base 1, the other end of the extension tube 5 is connected with one end of the three-way valve 6, and the extension tube 5 is communicated with the outer sheath tube body 3 through the outer sheath base 1.

According to the tearable vascular sheath, the extension tube 5 and the three-way valve 6 are connected to the side face of the outer sheath seat 1, after the medical instrument is introduced into the outer sheath, heparin physiological saline can be injected into the inner side of the outer sheath tube body 3 through the three-way valve 6 and the extension tube 5, residual gas in the outer sheath can be pumped out, so that the risk of thrombus of a patient is reduced, the three-way valve 6 is closed when a perfusion assembly is not used, and blood is prevented from flowing out of a human body or the gas enters the human body.

In one embodiment, the end of the extension tube 5 connected to the outer sheath hub 1 and the end of the outer sheath tube 3 connected to the outer sheath hub 1 are inserted into the outer sheath hub 1. The upper end face of the outer sheath tube body 3 is not exposed any more, so that the phenomenon that the outer sheath tube body 3 cannot be torn smoothly due to the fact that the outer sheath tube body 3 is easy to crush and scald due to the problems of a die, temperature, dimensional tolerance and the like is avoided.

In one embodiment, a slit is also provided on the outer sheath tube 3 at the end of the outer sheath tube 3 connected to the outer sheath holder 1, so as to facilitate tearing.

The working process comprises the following steps: before operation, the expansion tube assembly is required to be inserted into the outer sheath seat and the outer sheath tube body of the tearable outer sheath assembly from the top end of the outer sheath seat of the tearable outer sheath assembly, so that the expansion tube seat and the outer sheath seat are locked by clamping blocks and grooves around the protruding blocks. The method comprises the steps of penetrating the exposed end of a guide wire which is already entered into a puncture vessel into the head inner cavity of a tearing-type vascular sheath on the tearing-type vascular sheath which is already reliably locked, fixing the guide wire, pushing the sheath along the guide wire until the sheath enters into the vessel, fixing the vascular sheath, withdrawing the guide wire, pinching the expansion tube arm to release the locking between the expansion tube arm and the sheath seat, fixing the tearing-type sheath assembly, withdrawing the expansion tube assembly, then placing other instruments along the inner cavity of the sheath body of the tearing-type sheath assembly, injecting heparinized normal saline into the inner side of the sheath body through a three-way valve and an extension tube after the placement of the instruments is completed, extracting residual gas in the sheath, taking down the valve cover when the tearing-type sheath assembly is required, holding two wings of the pinching-type sheath seat, pinching the two wings to enable the end portions of the sheath seat and the sheath body to be torn along a tearing seam, tearing-type sheath seat and tearing-type sheath seat to be opened, and the two wings of the sheath body can be pulled out along the direction of the sheath body, so that the sheath body and the outer sheath seat can be pulled out normally.

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 invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It will be readily understood by those skilled in the art that the present invention, including any combination of parts described in the summary and detailed description of the invention above and shown in the drawings, is limited in scope and does not constitute a complete description of the various aspects of these combinations for the sake of brevity. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. The utility model provides a pinch-open can tear vascular sheath, includes can tear sheath subassembly and expansion pipe subassembly, its characterized in that, can tear sheath subassembly and include sheath body and sheath seat, the one end of sheath seat with the one end of sheath body links to each other, the sheath seat is for pinching open sheath seat, the sheath seat includes first sheath wing and second sheath wing, first sheath wing with the second sheath wing is L shape, just first sheath wing with the second sheath wing is axisymmetric, be equipped with the tear seam on the sheath seat, the tear seam is followed the axial setting of sheath seat just the tear seam will the sheath seat is equi-divided, first sheath wing with the second sheath wing is in tear seam department is equipped with the supporting point, just the supporting point of first sheath wing with the supporting point position of second sheath wing sets up relatively.

2. A pinch-open tearable vascular sheath according to claim 1, wherein the support points are isosceles trapezoids in shape with the shorter bases of the two support points being disposed opposite each other.

3. A pinch-open tearable vessel sheath according to claim 1 or 2, wherein the first and second sheath wings are provided with a plurality of anti-slip grooves.

4. The pinch-open tearable vascular sheath according to claim 1, wherein the sheath holder further comprises a valve cover, the valve cover is hollow and cylindrical, a plurality of protrusions are arranged on the outer surface of one end of the sheath holder, clamping grooves corresponding to the protrusions are arranged on the side surface of the valve cover, and the protrusions can be just clamped in the clamping grooves.

5. The pinch-open tearable vascular sheath of claim 4, wherein the front end surface of the valve cap is provided with a protruding block, and a groove is provided around the protruding block.

6. The pinch-open tearable vascular sheath according to claim 1, wherein the expansion tube assembly comprises an expansion tube body and an expansion tube seat, the expansion tube body is connected with the expansion tube seat, expansion tube arms are arranged on two sides of the expansion tube seat, and a clamping block is arranged on one end, close to the expansion tube body, of the expansion tube arm.

7. The pinch-open tearable vessel sheath according to claim 6, wherein the end of the dilating tube body is tapered and the head of the dilating tube body is conical.

8. A pinch-open tearable vascular sheath according to claim 4 or 5, wherein the first and second sheath wings are connected together by the valve cap, the junction of the first and second sheath wings being left free.

9. The pinch-open tearable vascular sheath according to claim 8, wherein one side of the first sheath wing or the second sheath wing is provided with an extension tube connection hole penetrating the first sheath wing or the second sheath wing and communicating with an inner space of a junction of the first sheath wing and the second sheath wing.