Directional tear controllable sheath

Abstract

The utility model provides a directional tearing controllable sheath relates to sheath technical field, the utility model discloses a sheath body, the outer surface of sheath body is provided with recess, the outer surface of one end of sheath body is provided with first auxiliary block and second auxiliary block symmetrically, one auxiliary block and second auxiliary block all are located between two recesses, the top of second auxiliary block is slightly higher than the top of first auxiliary block, the top of first auxiliary block and second auxiliary block is provided with fixing device, the fixing device is inserted and is limited through the setting bolt, and two round hole blocks that are connected with first auxiliary block and second auxiliary block are inserted and limited, the utility model discloses the two round hole blocks that are connected with first auxiliary block and second auxiliary block are inserted and limited through the setting bolt, and then can fix between first auxiliary block and second auxiliary block, be favorable to preventing the sheath from being torn in advance before or in the process of inserting into the blood vessel of patient due to the action of external force.

Description

Technical Field

[0001] This utility model relates to the field of sheath technology, and in particular to a directional tear-controllable sheath. Background Technology

[0002] Tearable sheaths are devices used to establish access in vascular interventional diagnosis and treatment. They help guide intravascular instruments into the blood vessel percutaneously. In certain special instrument delivery situations, the sheath cannot be withdrawn directly. In such cases, the sheath needs to be torn open from the outside, and it is called a tearable sheath when withdrawing.

[0003] To facilitate the use of tearable sheaths, it is generally not necessary to apply too much force when tearing the sheath, thereby reducing the damage to the patient. However, this also means that if the sheath is pulled by external force before or during insertion into the patient's blood vessel, it may cause the sheath to separate prematurely, leading to its failure. Utility Model Content

[0004] This invention provides a directional tear-controllable sheath to address the problem that if the sheath is pulled by external force before or during insertion into a patient's blood vessel, it may cause premature separation and thus render the sheath unusable.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a directional tear-controllable sheath, comprising a sheath body, the outer surface of which is symmetrically provided with grooves, and a first auxiliary block and a second auxiliary block symmetrically installed on the outer surface of one end of the sheath body, the first auxiliary block and the second auxiliary block being disposed between two grooves, the top of the second auxiliary block being slightly higher than the top of the first auxiliary block, the top of the first auxiliary block and the second auxiliary block being provided with a fixing device, the fixing device being provided with a pin to limit the insertion of two circular hole blocks connected to the first auxiliary block and the second auxiliary block, and a pull block being fixedly installed on the outer surface of the first auxiliary block and the second auxiliary block, the outer surface of which is provided with an anti-slip component.

[0006] The effect achieved by the above components is as follows: by setting a pin to limit the insertion of the two round hole blocks connected to the first auxiliary block and the second auxiliary block, the first auxiliary block and the second auxiliary block can be fixed, which helps to prevent the sheath from being torn prematurely due to external force before or during the insertion of the sheath into the patient's blood vessel.

[0007] Preferably, the fixing device includes two circular hole blocks, one end of each of the two circular hole blocks is located on the top of one side of the first auxiliary block and the second auxiliary block, and the same pin is inserted into the inner wall of the two circular hole blocks, and a connecting block is fixedly installed at one end of the pin.

[0008] The effect achieved by the above components is that by pushing the connecting block to drive the pin into the inner wall of the two round hole blocks, the first auxiliary block and the second auxiliary block connected to the two round hole blocks can be limited, making it difficult for the first auxiliary block and the second auxiliary block to separate.

[0009] Preferably, extension blocks are symmetrically fixedly installed on the outer surface of the connecting block, and slot blocks are fixedly installed on the top of both the first auxiliary block and the second auxiliary block, with the outer surface of the extension block inserted into the inner wall of the slot block.

[0010] The effect achieved by the above components is as follows: pushing the connecting block and the pin downward will cause the extension block to move synchronously. When the pin enters the inner wall of the two round hole blocks, the extension block just enters the inner wall of the slot block, which can limit the connecting block and the pin and help prevent the pin from dislodging from the inner wall of the two round hole blocks, causing the first auxiliary block and the second auxiliary block to dislodge from the limit.

[0011] Preferably, rubber blocks are fixedly installed on both sides of the inner wall of the slot block, and the vertical cross-section of the rubber blocks is triangular.

[0012] The effect achieved by the above components is as follows: by setting a triangular rubber block with a sloping top, it is easy for the extension block to be inserted into the inner wall of the slot block. At the same time, when the extension block is pushed down, the extension block will squeeze the rubber block, causing the rubber block to deform until the extension block is completely separated from the rubber block. At this time, the bottom of the rubber block and the top of the extension block abut against each other, and the two rubber blocks can limit the extension block to prevent it from falling out of the slot block.

[0013] Preferably, a spring is fitted on the outer surface of the pin, and the two ends of the spring are respectively fixedly installed on one side of the connecting block and one of the circular hole blocks.

[0014] The effect achieved by the above components is as follows: by setting the spring, when the connecting block is pushed down, the connecting block will squeeze the spring and cause the spring to deform. When the connecting block and the extension block are pushed up, the spring will automatically reset after the extension block is disengaged from the limit of the rubber block and the slot block, and the pin will move away from the inner wall of the bottom round hole block, which makes it easier to tear the first auxiliary block and the second auxiliary block.

[0015] Preferably, the anti-slip component includes a rubber sleeve, which is fitted onto the outer surface of the pull block, and the outer surface of the rubber sleeve is uniformly provided with grooves.

[0016] The effect achieved by the above-mentioned components is as follows: by setting a rubber sleeve with grooves, the friction of the outer surface of the pull block can be increased, so that it has an anti-slip effect when tearing the sheath body by the pull block. In addition, the rubber sleeve is detachable, which makes it easy to clean, disinfect and replace the rubber sleeve separately, and facilitates the reuse of resources.

[0017] Preferably, a retaining strip is provided on one side of the inner wall of the rubber sleeve, and the retaining strip is inserted into the inner wall of the pull block.

[0018] The effect achieved by the above components is that when the locking strip is inserted into the inner wall of the pull block, it can limit the movement between the rubber sleeve and the pull block, which helps to prevent the rubber sleeve from rotating on the outer surface of the pull block when the pull block is pulled, thus affecting the operation.

[0019] Preferably, a limiting block is fixedly installed at one end of the pull block, and the limiting block is trapezoidal in shape.

[0020] The effect achieved by the above components is as follows: by setting a limiting block, one end of the limiting block is smaller, which makes it easier for the rubber sleeve to be put on, while the other end of the rubber block is larger, which can limit the distance between the rubber sleeve and the pull block and help prevent the rubber sleeve from falling off the pull block.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In this invention, by setting a pin to limit the insertion of the two round hole blocks connected to the first auxiliary block and the second auxiliary block, the first auxiliary block and the second auxiliary block can be fixed together, which helps to prevent the sheath from being torn prematurely due to external force before or during the insertion of the sheath into the patient's blood vessel. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the main body of this utility model; Figure 2 This is a three-dimensional structural diagram of the fixing device of this utility model; Figure 3 This utility model Figure 2 A magnified structural diagram at point A; Figure 4 This utility model Figure 2 A magnified structural diagram at point B.

[0023] Legend: 1. Sheath body; 2. First auxiliary block; 3. Second auxiliary block; 4. Fixing device; 41. Round hole block; 42. Pin; 43. Connecting block; 44. Spring; 45. Extension block; 46. Slot block; 47. Rubber block; 5. Pull block; 6. Anti-slip component; 61. Rubber sleeve; 62. Locking strip; 63. Limiting block. Detailed Implementation

[0024] Example 1, referring to Figures 1-3As shown, this embodiment discloses a directional tearing controllable sheath, including a sheath body 1. The outer surface of the sheath body 1 is symmetrically provided with grooves. A first auxiliary block 2 and a second auxiliary block 3 are symmetrically installed on the outer surface of one end of the sheath body 1. The first auxiliary block 2 and the second auxiliary block 3 are both positioned between two grooves. Pulling the first auxiliary block 2 and the second auxiliary block 3 in the opposite direction will tear the sheath body 1 along the two grooves. The top of the second auxiliary block 3 is slightly higher than the top of the first auxiliary block 2. A fixing device 4 is provided on the top of the first auxiliary block 2 and the second auxiliary block 3. By setting a pin 42, the two round hole blocks 41 connected to the first auxiliary block 2 and the second auxiliary block 3 are inserted and limited. Pull blocks 5 are fixedly installed on the outer surfaces of the first auxiliary block 2 and the second auxiliary block 3. The outer surface of the pull block 5 is provided with an anti-slip component 6. By setting a pin 42 to limit the insertion of the two round hole blocks 41 connected to the first auxiliary block 2 and the second auxiliary block 3, the first auxiliary block 2 and the second auxiliary block 3 can be fixed together. This helps to prevent the sheath from being torn prematurely due to external force before or during the insertion of the sheath into the patient's blood vessel.

[0025] Reference Figure 2 and Figure 3 As shown, the fixing device 4 includes two circular hole blocks 41, one end of each of the two circular hole blocks 41 being located on the top of one side of the first auxiliary block 2 and the second auxiliary block 3, respectively. The same pin 42 is inserted into the inner wall of the two circular hole blocks 41. A connecting block 43 is fixedly installed at one end of the pin 42. Pushing the connecting block 43 causes the pin 42 to enter the inner wall of the two circular hole blocks 41, thus limiting the first auxiliary block 2 and the second auxiliary block 3 connected to the two circular hole blocks 41, making it difficult for the first auxiliary block 2 and the second auxiliary block 3 to separate. The outer surface of the connecting block 43 is symmetrically fixed. The first auxiliary block 2 and the second auxiliary block 3 are both fixedly mounted with a slot block 46 on the top of the extension block 45. The outer surface of the extension block 45 is inserted into the inner wall of the slot block 46. Pushing the connecting block 43 and the pin 42 downward will cause the extension block 45 to move synchronously. When the pin 42 enters the inner wall of the two round hole blocks 41, the extension block 45 just enters the inner wall of the slot block 46. This can limit the connection block 43 and the pin 42, which helps to prevent the pin 42 from dislodging from the inner wall of the two round hole blocks 41, causing the first auxiliary block 2 and the second auxiliary block 3 to dislodge.

[0026] Reference Figure 2 and Figure 3As shown, rubber blocks 47 are fixedly installed on both sides of the inner wall of the slot block 46. The vertical cross-section of the rubber block 47 is triangular. By setting the triangular rubber block 47, the top of the rubber block 47 is inclined, which facilitates the insertion of the extension block 45 into the inner wall of the slot block 46. At the same time, when the extension block 45 is pushed down, the extension block 45 will squeeze the rubber block 47, causing the rubber block 47 to deform until the extension block 45 is completely separated from the rubber block 47. At this time, the bottom of the rubber block 47 abuts against the top of the extension block 45, and the two rubber blocks 47 can limit the extension block 45 to prevent the extension block 45 from falling out of the slot. Block 46; A spring 44 is sleeved on the outer surface of the pin 42. The two ends of the spring 44 are respectively fixedly installed on one side of the connecting block 43 and one of the round hole blocks 41. By setting the spring 44, when the connecting block 43 is pushed down, the connecting block 43 will squeeze the spring 44 and cause the spring 44 to deform. When the connecting block 43 and the extension block 45 are pushed up, the extension block 45 will be disengaged from the limit of the rubber block 47 and the slot block 46. The spring 44 will automatically reset and make the pin 42 move away from the inner wall of the bottom round hole block 41, which facilitates the tearing operation of the first auxiliary block 2 and the second auxiliary block 3.

[0027] Reference Figure 2 and Figure 4 As shown, the anti-slip component 6 includes a rubber sleeve 61, which is fitted onto the outer surface of the pull block 5. The outer surface of the rubber sleeve 61 is uniformly provided with grooves. By providing a rubber sleeve 61 with grooves, the friction of the outer surface of the pull block 5 can be increased, so that it has an anti-slip effect when the sheath body 1 is torn by the pull block 5. In addition, the rubber sleeve 61 is detachable, which makes it easy to clean, disinfect and replace the rubber sleeve 61 separately, and facilitates the reuse of resources.

[0028] Reference Figure 2 and Figure 4 As shown, a retaining strip 62 is provided on one side of the inner wall of the rubber sleeve 61. The retaining strip 62 is inserted into the inner wall of the pull block 5. By setting the retaining strip 62 and inserting it into the inner wall of the pull block 5, the rubber sleeve 61 and the pull block 5 can be limited, which helps to prevent the rubber sleeve 61 from rotating on the outer surface of the pull block 5 when the pull block 5 is pulled, thus affecting the operation. A limiting block 63 is fixedly installed at one end of the pull block 5. The limiting block 63 is trapezoidal. By setting the limiting block 63, one end of the limiting block 63 is smaller, which makes it easier for the rubber sleeve 61 to be put on. At the same time, the other end of the rubber block 47 is larger, which can limit the rubber sleeve 61 and the pull block 5, thus preventing the rubber sleeve 61 from falling off the pull block 5.

[0029] Working principle: Pushing the connecting block 43 and the pin 42 downwards will cause the extension block 45 to move synchronously and compress the spring 44, causing the spring 44 to deform. The extension block 45 will then compress the two rubber blocks 47, causing the rubber blocks 47 to deform, until the extension block 45 is completely separated from the rubber blocks 47. At this time, the pin 42 just enters the inner wall of the two round hole blocks 41, and the bottom of the rubber block 47 abuts against the top of the extension block 45. The two rubber blocks 47 can limit the extension block 45, preventing the extension block 45 from dislodging from the slot block 46. This limits the connecting block 43 and the pin 42, and fixes the first auxiliary block 2 and the second auxiliary block 3, which helps to prevent the sheath from being inserted into the patient's blood vessel or into the blood vessel. During the process, the sheath is torn prematurely due to external force. Pushing the connecting block 43 and the extension block 45 upwards causes the extension block 45 to disengage from the limit of the rubber block 47 and the slot block 46. The spring 44 will automatically reset and move the pin 42 away from the inner wall of the bottom round hole block 41, which facilitates the tearing operation of the first auxiliary block 2 and the second auxiliary block 3. Passing the rubber sleeve 61 through the limit block 63, the rubber sleeve 61 is fitted on the outer surface of the pull block 5 and the clip 62 is inserted into the inner wall of the pull block 5 until one end of the rubber sleeve 61 abuts against one side of the limit block 63, which can fix the rubber sleeve 61 and the pull block 5. The rubber sleeve 61 is detachable, which facilitates the separate cleaning, disinfection and replacement of the rubber sleeve 61, and facilitates the reuse of resources.

Claims

1. A directional tear-controllable sheath, comprising a sheath body (1), characterized in that: The outer surface of one end of the sheath body (1) is symmetrically equipped with a first auxiliary block (2) and a second auxiliary block (3). The top of the second auxiliary block (3) is higher than the top of the first auxiliary block (2). The top of the first auxiliary block (2) and the second auxiliary block (3) are provided with a fixing device (4). The fixing device (4) uses a pin (42) to insert and limit the two round hole blocks (41) connected to the first auxiliary block (2) and the second auxiliary block (3). Pull blocks (5) are fixedly installed on the outer surfaces of the first auxiliary block (2) and the second auxiliary block (3).

2. The directional tearing controllable sheath according to claim 1, characterized in that: The fixing device (4) includes two round hole blocks (41), one end of each of the two round hole blocks (41) is on the top of the first auxiliary block (2) and the second auxiliary block (3) respectively, and the same pin (42) is inserted into the inner wall of the two round hole blocks (41), and a connecting block (43) is fixedly installed at one end of the pin (42).

3. The directional tear-controllable sheath according to claim 2, characterized in that: The outer surface of the connecting block (43) is symmetrically fixedly equipped with extension blocks (45), and the top of the first auxiliary block (2) and the second auxiliary block (3) are both fixedly equipped with slot blocks (46), and the outer surface of the extension block (45) is inserted into the inner wall of the slot block (46).

4. The directional tear-controllable sheath according to claim 3, characterized in that: Rubber blocks (47) are fixedly installed on both sides of the inner wall of the slot block (46), and the vertical cross section of the rubber block (47) is triangular.

5. The directional tear-controllable sheath according to claim 2, characterized in that: A spring (44) is fitted on the outer surface of the pin (42), and the two ends of the spring (44) are respectively fixedly installed on one side of the connecting block (43) and one of the round hole blocks (41).

6. The directional tearing controllable sheath according to claim 2, characterized in that: The outer surface of the pull block (5) is provided with an anti-slip component (6), the anti-slip component (6) includes a rubber sleeve (61), the rubber sleeve (61) is fitted on the outer surface of the pull block (5), and the outer surface of the rubber sleeve (61) is uniformly provided with grooves.

7. A directional tear-controllable sheath according to claim 6, characterized in that: A retaining strip (62) is provided on one side of the inner wall of the rubber sleeve (61), and the retaining strip (62) is inserted into the inner wall of the pull block (5).

8. A directional tear-controllable sheath according to claim 6, characterized in that: One end of the pull block is fixedly installed with a limiting block (63), which is trapezoidal in shape.

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