Easily-torn sheath base and catheter sheath

Abstract

The utility model relates to an easy-to-tear sheath base and a catheter sheath, and belongs to the technical field of medical instruments. The sheath base is provided with two connected clamping and pressing parts in a notch mode, the two clamping and pressing parts form a cavity in the center of the easy-to-tear sheath base, and the bottom of the sheath base is connected with a tearable sheath tube communicated with the cavity; a pre-tearing groove is formed in the space between the clamping and pressing parts, a pre-tearing part is formed in the connecting position of the two clamping and pressing parts, and the pre-tearing part is arranged to be of an easy-to-tear structure; each clamping and pressing part comprises two handles capable of applying force oppositely, and the pre-tearing part between the two clamping and pressing parts is separated by applying opposite pressure to one set of handles in the two clamping and pressing parts at the same time. When the easy-to-tear sheath base is used, the pre-tearing part between the two clamping and pressing parts can be separated only by applying opposite pressure to one group of handles in the two clamping and pressing parts at the same time, compared with vertical tearing of a traditional sheath base, more labor-saving transverse tearing can be provided, and the operation flexibility is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and in particular to a tearable sheath seat and a catheter sheath. Background Art

[0002] The catheter sheath is a device used to establish a percutaneous access pathway for guiding catheters, balloon catheters or other intravascular devices during vascular interventional diagnosis and treatment. The tearable sheath commonly used in interventional treatment is composed of a tearable sheath seat and an expansion tube. During use, the tearable sheath is first inserted into the human blood vessel using a guide wire, and then the expansion tube is withdrawn, and the catheter to be inserted is sent into the human blood vessel from the sheath of the tearable sheath seat. After the tearable sheath seat is used, it can be torn along the central axis and completely withdrawn from the body without withdrawing from the rear of the catheter, which provides convenience for the intubation process.

[0003] Successfully establishing a surgical access through a tearable sheath is a prerequisite for a successful operation. In order to make the operation of the tearable sheath smoother and safer, various improvements have been made to the tearable sheath products in the prior art. For example, CN202121756407.9 discloses an anti-mis-tear tearable sheath. When assembling the dilator assembly with the tearable sheath assembly, one end of the limiting block is limited in the limiting groove, thereby achieving a point-type fastening between the dilator assembly and the tearable sheath assembly. During production, transportation or storage, the point-type fastening structure can clamp the tear sheath seat to avoid accidental tearing.

[0004] For another example, CN202221537998.5 discloses a tearable sheath with a reversible limiter, which makes it difficult for the expansion tube seat of the sheath to be detached from the sheath seat when in use through the limiter assembly, thereby avoiding misoperation during surgery. The tearable sheath disclosed in CN202221782972.7 can solve the problem of blood reflux along the sheath by designing a sealing pad, and by improving the structure of the sealing pad and designing a blind groove on the sealing pad, the sealing pad is easy to tear and not easy to break accidentally.

[0005] The sheath seats of the aforementioned various tearable sheaths are composed of two symmetrical parts, which are connected by a thin connecting layer. When tearing, the medical staff needs to hold the two handles of the sheath seat with both hands at the same time and apply force in opposite directions to tear the sheath seat from top to bottom. This makes it inconvenient to apply force, which limits the flexibility of the medical staff in operation. Utility Model Content

[0006] The object of the present disclosure is to improve the tearing flexibility of the tearable sheath during the tearing operation.

[0007] To achieve the above objectives, the present invention provides an easy-to-tear sheath seat:

[0008] It comprises two connected clamping parts, wherein the two clamping parts form a cavity at the center of the tearable sheath seat, and the bottom of the sheath seat is connected to a tearable sheath tube communicating with the cavity;

[0009] The space between the clamping parts forms a pre-tear groove, and the connection between the two clamping parts forms a pre-tear part, and the pre-tear part is set to an easy-tear structure;

[0010] The clamping portion comprises two handles which can apply force towards each other, and applying pressure towards each other to one set of the handles in the two clamping portions simultaneously will separate the pre-torn portion between the two clamping portions.

[0011] Preferably, one end of the handle is a tearing end, and the other end is a force-applying end, and each handle is connected to the handles on two adjacent sides through the tearing end;

[0012] The space between adjacent handles forms the pre-tearing groove, the connection between adjacent handles forms the pre-tearing portion, and any group of handles constitutes one clamping portion;

[0013] Simultaneously applying pressures towards one set of the force-applying ends of the two clamping parts will separate the pre-torn portion between the two clamping parts.

[0014] Preferably, the angle between the tearing ends of two adjacent handles is not equal to the angle between the two force-applying ends.

[0015] More preferably, the angle between the tearing ends of two adjacent handles is an acute angle.

[0016] More preferably, the tear end first gradually expands and then gradually contracts toward the cavity.

[0017] Preferably, the angle between the midlines of two adjacent handles is an acute angle.

[0018] Preferably, the angle between the midlines of two adjacent handles is a right angle.

[0019] Preferably, the cross section between two adjacent tearing ends is V-shaped.

[0020] Preferably, the cross section between two adjacent tearing ends is arc-shaped.

[0021] To achieve the above objectives, the present disclosure further provides a catheter sheath, which uses any of the aforementioned tearable sheath seats.

[0022] The technical solution claimed in the present disclosure has achieved the following beneficial effects:

[0023] 1) The tearable sheath seat disclosed in the present invention is composed of two connected clamping parts. The pre-tear part between the two clamping parts can be separated by applying opposite pressure to a set of handles in the two clamping parts at the same time, thereby realizing the tearing of the sheath seat. Compared with the "vertical" tearing of the traditional sheath seat, the scheme disclosed in the present invention can form a force point at the connection angle of the clamping part handles, which can not only provide "horizontal" tearing of the sheath seat, but also tear the sheath seat with less force, thereby improving the flexibility of operation.

[0024] 2) The tearable sheath seat disclosed in the present invention is specifically composed of four connected handles, so medical staff can, according to the actual situation at work (such as the position relative to the patient or their own force application habits, etc.), use one hand to select any two adjacent handles as clamping parts and apply relative pressure to two of the handles, and use the other hand to apply relative pressure to the remaining two handles at the same time to break the pre-tear part between the two clamping parts. Compared with the traditional tearable sheath that can only tear the sheath seat along the left and right sides, the sheath seat disclosed in the present invention can be torn from all directions, allowing medical staff to choose an angle that is easier to apply force to tear the sheath seat, greatly improving the flexibility of medical staff's operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are merely embodiments of the present disclosure, and a person of ordinary skill in the art can obtain other drawings based on the provided drawings without paying any creative work.

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the tearable sheath seat.

[0027] Figure 2 It is a schematic diagram of the side view structure of the tearable sheath seat.

[0028] Figure 3 It is a schematic diagram of the top view of the tearable sheath seat.

[0029] Figure 4 This is a schematic diagram of the angles of the components of the tearable sheath seat.

[0030] Reference numerals:

[0031] 1-handle; 2-tearing end; 3-force-applying end; 4-pre-tearing groove; 5-pre-tearing portion; 6-cavity. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and beneficial effects of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] Example 1

[0034] Reference Figures 1 to 4 , this embodiment provides an easy-to-tear sheath seat.

[0035] The sheath seat comprises two connected clamping parts, which can be integrally formed or spliced. The two clamping parts form a cavity 6 at the center of the tearable sheath seat, and the cavity 6 is used to accommodate the expansion tube. The bottom of the sheath seat is connected to the tearable sheath tube connected to the cavity 6.

[0036] In this embodiment, the space between the clamping parts forms a pre-tear groove 4, and the connection between the two clamping parts forms a pre-tear part 5, and the pre-tear part 5 is configured as an easy-tear structure.

[0037] The clamping part includes two handles 1 that can apply force toward each other. Simultaneously applying pressure toward each other to a group of handles 1 in the two clamping parts will separate the pre-tear part 5 between the clamping parts.

[0038] Since the tearable sheath seat is composed of two clamping parts, the pre-tear part between the two clamping parts can be separated by applying opposite pressure to a set of handles in the two clamping parts at the same time, thereby realizing the tearing of the sheath seat. Compared with the "vertical" tearing of the traditional sheath seat, the scheme disclosed in the present invention can form a force point at the connection angle of the clamping part handles, which can not only provide "horizontal" tearing of the sheath seat, but also tear the sheath seat with less force, thereby improving the flexibility of operation.

[0039] In a preferred embodiment, one end of the handle 1 is a tearing end 2, and the other end is a force-applying end 3, and each handle 1 is connected to the other handles 1 on both sides through the tearing end 2. In an exemplary embodiment, the cross section between two adjacent tearing ends 2 can be V-shaped or arc-shaped, or can be set to any other shape that does not affect the tearing function.

[0040] In this preferred embodiment, the space between two adjacent handles forms a pre-tear groove 4, and the joint of two adjacent handles 1 forms a pre-tear portion 5, which is configured as an easy-tear structure. The specific configuration of the easy-tear structure can refer to the tearable structure in any existing tearable sheath, and will not be described in detail here.

[0041] The tearing ends 2 connected to the four handles 1 form a cavity 6 in the center of the tearable sheath seat, and the cavity 6 is used to accommodate the expansion tube. The bottom of the sheath seat is also connected to a tearable sheath tube (not shown in the figure) that is connected to the cavity 6.

[0042] In the solution of this embodiment, refer to the attached Figure 3 The force-applying ends 3 of any group of handles 1 constitute a clamping portion. When opposite pressures are applied to one group of force-applying ends 3 in two clamping portions at the same time (refer to the direction of the arrows), the pre-tear portion 5 between the two clamping portions will be torn open, thereby tearing the sheath and removing it.

[0043] In a preferred solution, in order to make the tearing between the two clamping parts more labor-saving, this embodiment further adjusts the pre-tear groove angle, the tear end angle and the handle spacing. Figure 4 In the figure, a represents the angle between the handle midline and the pre-tear groove midline, b represents the angle between the midlines of adjacent handles, and c represents the angle between the midlines of adjacent pre-tear grooves. For example, the angle between the midlines of two adjacent pre-tear grooves 4 can be set to 90°, the angle between the tearing ends 2 of two adjacent handles 1 is not equal to the angle between the two force-applying ends 3, and the angle between the midlines of adjacent handles can be set to an acute angle or a right angle.

[0044] In a more preferred embodiment, the angle between the tearing ends 2 of two adjacent handles 1 is set to an acute angle. In an exemplary embodiment, the tearing ends 2 can be set to gradually expand and then gradually contract toward the cavity 6 to form a V-shaped attack angle with an acute angle that saves more effort after connection.

[0045] Since the tearable sheath seat in this embodiment is composed of four handles 1, medical staff can select any two adjacent handles 1 as clamping parts and apply relative pressure to two of the handles with one hand according to the actual working conditions (such as the position relative to the patient or their own force application habits, etc.), and apply relative pressure to the remaining two handles with the other hand at the same time to break the pre-torn part between the two clamping parts. Compared with the traditional tearable sheath that can only tear the sheath seat along the left and right sides, the sheath seat in this embodiment can be torn from all directions, so that medical staff can choose an angle that is easier to apply force to tear the sheath seat, which greatly improves the flexibility of medical staff's operation.

[0046] Example 2

[0047] This embodiment provides a catheter sheath, which uses the easy-tear sheath seat in Example 1.

[0048] The embodiments and application examples described above are merely illustrative descriptions of the present disclosure and are not intended to limit the scope of the present disclosure. Without departing from the design spirit of the present disclosure, various modifications and improvements made to the technical solutions of the present disclosure by ordinary technicians in this field should all fall within the protection scope determined by the present disclosure.

Claims

1. A tearable sheath seat, characterized in that: It comprises two connected clamping parts, wherein the two clamping parts form a cavity at the center of the tearable sheath seat, and the bottom of the sheath seat is connected to a tearable sheath tube communicating with the cavity; The space between the clamping parts forms a pre-tear groove, and the connection between the two clamping parts forms a pre-tear part, and the pre-tear part is set to an easy-tear structure; The clamping portion comprises two handles which can apply force towards each other, and applying pressure towards each other to one set of the handles in the two clamping portions simultaneously will separate the pre-torn portion between the two clamping portions.

2. The tearable sheath seat according to claim 1, characterized in that: One end of the handle is a tearing end, and the other end is a force-applying end, and each handle is connected to the handles on two adjacent sides through the tearing end; The space between adjacent handles forms the pre-tearing groove, the connection between adjacent handles forms the pre-tearing portion, and any group of handles constitutes one clamping portion; Simultaneously applying pressures towards one set of the force-applying ends of the two clamping parts will separate the pre-torn portion between the two clamping parts.

3. The tearable sheath seat according to claim 2, characterized in that: The angle between the tearing ends of two adjacent handles is not equal to the angle between the two force-applying ends.

4. The tearable sheath seat according to claim 3, characterized in that: The included angle between the tearing ends of two adjacent handles is an acute angle.

5. The tearable sheath seat according to claim 3 or 4, characterized in that: The tear end first gradually expands and then gradually contracts toward the cavity.

6. The tearable sheath seat according to claim 2, characterized in that: The included angle between the midlines of two adjacent handles is an acute angle.

7. The tearable sheath seat according to claim 2, characterized in that: The included angle between the midlines of two adjacent handles is a right angle.

8. The tearable sheath seat according to claim 2, characterized in that: The cross section between two adjacent tearing ends is V-shaped.

9. The tearable sheath seat according to claim 2, characterized in that: The cross section between two adjacent tearing ends is arc-shaped.

10. A catheter sheath, characterized in that: The catheter sheath uses the tearable sheath seat according to any one of claims 1 to 9.

Images