A safety protection tearable sheath

Abstract

The present invention proposes a safety protection tearable sheath to reduce the complexity of surgical operations and reduce the risk of infection during surgery. The safety protection tearable sheath comprises a sheath body and a sheath tail, wherein: the sheath tail comprises a predetermined tearing groove extending from the outer wall of the sheath tail toward the inner wall; the sheath body comprises an escape slit extending through the outer wall of the sheath body, the escape slit penetrating the wall of the sheath body, and extending from the predetermined tearing groove along the sheath body to the opening at the head of the sheath body.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a safety protection tearable sheath. Background Art

[0002] At present, the structure of the tearable sheath is as follows: from the head to the tail of the sheath, grooves with a wall thickness of more than 50% are made on the two sides of the tube wall at 180 degrees relative to each other, but the integrity of the inner wall of the sheath is not affected. The existing method of using the sheath is as follows: while keeping the inner wall of the sheath intact, operate the sheath to reach the predetermined position of the target blood vessel, and complete various diagnostic and therapeutic equipment operations through the inner lumen of the sheath. After the device is delivered to the cardiovascular part through the inner lumen of the sheath and placed, it is necessary to keep the device in the blood vessel, and only the sheath needs to be removed separately. Since the tail of the device is relatively thick, the sheath cannot be removed directly. The sheath must be torn into sections first, and then divided into two pieces and removed from the body.

[0003] Due to the design and operation of double-sided tearing of the sheath, the tail of the sheath must be torn off first, and then the sheath is pulled out in sections, and the sheath is torn off in sections. However, when the tail of the sheath is torn off, a large amount of blood is likely to seep out of the body from the sheath. Moreover, when the sheath is pulled out, it is easy for the instruments that are already in place to shift outward along with the sheath, affecting the quality and effect of the operation. In addition, when the sheath is pulled out and torn off in sections, there is always bleeding from the torn part of the sheath. In addition, when the last section of the sheath is torn off, due to the inertia of the tearing action and the elastic effect of the sheath tearing piece, blood is likely to splash, causing surgical field contamination and occupational infection of the surgical operator. Moreover, the existing double-sided tearing design means that the entire process of tearing off the sheath requires the surgical operator to operate with both hands, so the assistant must fix the instrument throughout the process to prevent the instrument from shifting, which correspondingly increases the complexity of the surgical operation and increases the chance of infection. Summary of the Invention

[0004] The embodiment of the present invention provides a safety protection tearable sheath to reduce the complexity of surgical operations and reduce the risk of infection during the surgical process.

[0005] An embodiment of the present invention provides a safety protection tearable sheath, comprising a sheath body and a sheath tail, wherein:

[0006] The sheath tube tail portion is provided with a predetermined tearing groove, and the predetermined tearing groove is opened from the outer wall to the inner wall of the sheath tube tail portion;

[0007] The sheath body is provided with an escape slit penetrating the outer wall of the sheath body. The escape slit penetrates the wall of the sheath body and runs from the predetermined tearing groove along the sheath body to the head opening of the sheath body.

[0008] In one embodiment, the sheath tube tail portion is further provided with a predetermined folding channel, the predetermined folding channel is opened from the outer wall toward the inner wall of the sheath tube tail portion, and the predetermined folding channel is opened in the opposite direction of the predetermined tearing channel.

[0009] In one embodiment, the thickness of the predetermined tear channel is smaller than the thickness of the sheath tail.

[0010] In one embodiment, the thickness of the predetermined tearing channel is 50%-90% of the thickness of the sheath tail.

[0011] In one embodiment, the thickness of the predetermined folding channel is smaller than the thickness of the sheath tail.

[0012] In one embodiment, the thickness of the predetermined folding channel is 30%-80% of the thickness of the sheath tail.

[0013] In one embodiment, the predetermined folding channel and the predetermined tearing channel are 180 degrees opposite to each other.

[0014] In one embodiment, the width of the predetermined folding channel is greater than the width of the predetermined tearing channel.

[0015] In one embodiment, the sheath tube tail is further provided with two tearing handles, the two tearing handles are arranged opposite to each other, and the two handles are respectively arranged on both sides of the predetermined tearing groove.

[0016] By adopting the above technical solution, the present invention has at least the following advantages:

[0017] The safety protection tearable sheath described in the present invention has a predetermined tearing groove at the tail of the sheath, and an escape seam that penetrates and runs through the outer wall of the sheath body. In this way, when the surgical operator needs to withdraw the sheath, he only needs to tear off the tail of the sheath exposed outside the skin, and the sheath body does not need to be torn due to the existence of the escape seam, thereby avoiding bleeding caused by tearing off the sheath body in contact with the skin or blood splashing caused by the final withdrawal of the sheath, reducing the infection risk of the surgical operator; moreover, after tearing off the tail of the sheath, since there is no need to tear off the sheath body, the surgical operator can withdraw the sheath with one hand, reducing the complexity of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1a A right side view of a tearable safety sheath according to an embodiment of the present invention;

[0019] Figure 1b A left side view of a tearable sheath for safety protection according to an embodiment of the present invention;

[0020] Figure 1cSchematic diagram of the escape slit at the head opening of the sheath body according to an embodiment of the present invention;

[0021] Figure 1d Schematic diagram of a predetermined tearing groove on the tail portion of the sheath tube according to an embodiment of the present invention;

[0022] Figure 1e Schematic diagram of a predetermined folded concave channel on the tail portion of the sheath tube according to an embodiment of the present invention;

[0023] Figure 2a This is a schematic diagram of the sheath tube tail before it is torn open according to an embodiment of the present invention;

[0024] Figure 2b This is a schematic diagram of the sheath tube tail after being torn open according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose, the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0026] It should be noted that the terms "first," "second," and the like in the description and claims of the embodiments of the present invention and in the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments described herein can be implemented in an order other than that illustrated or described herein.

[0027] In this document, "multiple or several" refers to two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0028] The structural features of the existing tearable sheath are: from the head to the tail of the sheath, on the two sides of the tube wall at 180 degrees relative to each other, grooves of more than 50% of the wall thickness are made, and potential openings that can be used for tearing are reserved, but the integrity of the inner wall of the sheath is not affected. The method of use is: while keeping the inner wall of the sheath intact, operate the sheath to reach the predetermined position of the target blood vessel, and complete various diagnostic and therapeutic instrument operations through the inner lumen of the sheath. After the instrument is delivered to the cardiovascular part through the inner lumen of the sheath and placed, it is necessary to keep the instrument in the blood vessel, and only the sheath needs to be withdrawn separately. At this time, because the tail of the instrument is relatively thick and obviously larger than the inner diameter of the sheath, the sheath cannot be withdrawn directly through the instrument. The sheath must first be torn into sections, and then divided into two pieces and withdrawn from the body. During the operation that requires sheath tearing, the operating steps for tearing and withdrawing the tearable sheath are as follows:

[0029] Step 1: Fix the position of the instrument and withdraw the sheath of appropriate length.

[0030] Step 2: The operator holds the handle at the end of the sheath tube with the thumb and index finger of both hands and tears the end of the sheath tube in the same direction perpendicular to the long axis of the sheath tube.

[0031] Step 3: Remove the sheath in sections and tear it open in sections.

[0032] Step 4: Completely remove the sheath, tear open the sheath tip, and remove the two tear-off pieces.

[0033] Step 5: The surgical assistant presses the skin entrance of the instrument to stop bleeding.

[0034] The inventors discovered that, during the above process, the existing tearable sheath has the following problems:

[0035] 1. Due to the design and operation of tearing the sheath on both sides, the tail of the sheath must be torn off first, then the sheath is pulled out in sections, and finally the two tear-off pieces are torn off in sections and removed. However, when the tail of the sheath is torn off, a large amount of blood is easily leaked out of the sheath.

[0036] 2. When the sheath is pulled out, the instruments that are already in place may easily shift outside the body along with the sheath, affecting the quality and effect of the operation.

[0037] 3. When the sheath is pulled out and torn apart in sections, bleeding continues to occur from the torn portion of the sheath.

[0038] 4. When tearing off the last section of the sheath, due to the inertia of the tearing action and the elastic effect of the sheath tearing piece, blood is easily splashed, causing surgical field contamination and occupational infection of the surgeon.

[0039] 5. Since the entire process of tearing the sheath requires the surgeon to use both hands, an assistant must fix the instrument throughout the process to prevent it from shifting. This increases the complexity of the surgical operation and the chance of infection.

[0040] In view of this, an embodiment of the present invention provides a safety protection tearable sheath, which includes a sheath body 11 and a sheath tail 12, wherein the sheath tail is predetermined to have a tearing groove 120, and the predetermined tearing groove 120 is opened from the outer wall of the sheath tail toward the inner wall, and the sheath body 11 passes through an escape seam 110 on the outer wall of the sheath body, and the escape seam 110 penetrates the wall of the sheath body 11, and the escape seam 110 starts from the predetermined tearing groove 120 and passes through the sheath body to the head opening of the sheath body.

[0041] In one embodiment, the predetermined tear channel 120 can penetrate the outer wall of the sheath tail 12 to reach the inner wall of the sheath tail, that is, the thickness of the predetermined tear channel is the same as the thickness of the sheath tail 12, so that the sheath tail 12 is an open shape.

[0042] In another embodiment, the thickness of the predetermined tear channel 120 can also be less than the thickness of the sheath tube tail portion 12. That is, the predetermined tear channel 120 does not affect the integrity of the inner wall of the sheath tube tail portion 12. In this embodiment, the thickness of the predetermined tear channel 120 can be designed according to actual needs. For example, the thickness of the predetermined tear channel 120 can be 50%-90% of the thickness of the sheath tube tail portion 12. In specific implementations, the predetermined tear channel 120 can be formed on the predetermined tear side of the sheath tube tail portion 12, from the outer wall toward the inner wall, to occupy at least 50% and no more than 90% of the thickness of the sheath tube tail portion.

[0043] In specific implementation, in the safety protection tearable sheath provided by an embodiment of the present invention, the tail of the sheath can also have a predetermined folding groove 121, which is opened from the outer wall to the inner wall of the tail of the sheath 12, and can be opened in the opposite direction of the predetermined tearing groove 120.

[0044] In one embodiment, the predetermined folding channel 120 is 180 degrees relative to the predetermined tearing channel 121. The width of the predetermined folding channel 121 is greater than the width of the predetermined tearing channel 120.

[0045] In another embodiment, the thickness of the predetermined folded concave channel 121 may be smaller than the thickness of the sheath tube tail portion 12 . For example, the thickness of the predetermined folded concave channel 121 may be 30%-80% of the thickness of the sheath tube tail portion 12 .

[0046] In practice, a predetermined folding channel 120 can be formed on the intended folding side of the sheath tail 12, extending from the outer wall toward the inner wall, occupying at least 30% and no more than 80% of the sheath tail wall thickness. The predetermined folding channel 121 is located opposite the predetermined tearing channel 120, i.e., the predetermined folding channel 121 and the predetermined tearing channel 120 are located at corresponding locations on both sides of the sheath tail 12. On the sheath body 11, the sheath wall, from the predetermined folding channel 121 at the sheath tail 12 toward the head of the sheath body, remains intact.

[0047] It should be noted that, in specific implementations, the thickness of the predetermined folding channel 121 and the predetermined tearing channel 120 can be designed according to actual needs, and the embodiments of the present invention are not limited thereto. The predetermined folding channel 121 and the predetermined tearing channel 120 can also penetrate the wall of the sheath tube tail portion 12, that is, from the outer wall of the sheath tube tail portion 12 to the inner wall of the sheath tube tail portion 12, forming an open shape.

[0048] During specific implementation, in order to facilitate operation, the safety protection tearable sheath provided in the embodiment of the present invention also has two tear handles 122 at the tail end of the sheath. The two tear handles 122 are arranged opposite to each other and are respectively arranged on both sides of the predetermined tear groove 120. In one embodiment, the positions of the two tear handles 122 can be designed symmetrically relative to the predetermined tear groove 120.

[0049] like Figure 1a As shown, it is a right view of the safety protection tearable sheath provided by an embodiment of the present invention, as shown Figure 1b As shown, it is a left view of the safety protection tearable sheath provided by the embodiment of the present invention. Figure 1a and Figure 1b The invention also includes a side tube 13 provided on the sheath tail 12 and a head opening 111 of the sheath body. In specific implementation, an escape seam 110 is made on the sheath body 11, starting from the predetermined tearing groove 120 on the sheath tail 12, and penetrating the entire sheath wall toward the sheath head until reaching the head opening of the sheath body. Figure 1c As shown, it is a schematic cross-sectional view of the head opening of the sheath body 11, as shown Figure 1d As shown in FIG, it is a schematic diagram of the cross section of the sheath tube tail, as shown in FIG. Figure 1e As shown, it is a schematic cross-sectional view of the tearing handle at the tail end of the sheath.

[0050] According to the safety protection tearable sheath provided by the embodiment of the present invention, during actual operation, the predetermined tearing groove 120 is completely torn, while the predetermined folding groove 121 is not torn, but can be folded toward the outside of the sheath tail through the predetermined folding groove 121. Since the escape seam 110 penetrates the wall of the sheath body 11, that is, penetrates the outer wall of the sheath body 11 to reach the inner wall of the sheath body 11, the sheath body 11 is in the shape of a cylindrical body with an open opening. In this way, when the sheath body 11 is withdrawn, due to its open structure, there is no need to tear the sheath body, thereby avoiding bleeding and blood splattering caused by tearing the sheath body, thereby reducing the risk of infection for the surgical operator.

[0051] According to the safety protection tearable sheath provided by the embodiment of the present invention, the sheath can be withdrawn according to the following process:

[0052] Step 1: With the sheath in its current position, the operator holds the tear handles on both sides of the sheath tail with the thumbs and index fingers of both hands, and tears the sheath tail from the intended tearing side to the intended folding side and folds it toward the opposite side.

[0053] Step 2: The operator holds the instrument with the thumb and index finger of one hand, and holds the torn and folded tail of the sheath with the thumb and index finger of the other hand to expose the instrument leaving the tail of the sheath.

[0054] Step 3: The operator holds the instrument with his hand still, and holds the sheath end with his hand at an angle of 30 to 45 degrees to the long axis of the instrument, and pulls the sheath out through the escape slit of the sheath body at once. The schematic diagrams of the sheath end before and after tearing are as follows: Figure 2a and Figure 2b As shown, Figure 2a and Figure 2b Included is a catheter device 40.

[0055] Step 4: The operator removes the index finger holding the instrument and presses the skin at the puncture point to stop bleeding.

[0056] The safety protection tearable sheath provided by the embodiment of the present invention does not affect the positioning of the instrument placed through the sheath in the body during the process of tearing and withdrawing the sheath, and does not cause obvious bleeding when the tail of the sheath is torn. Moreover, the sheath body can be withdrawn at one time, improving operational efficiency and significantly reducing bleeding. During the sheath withdrawal process, no blood splashes from the sheath tip to contaminate the surgical field and the operator. In addition, the surgical operator can independently operate the sheath withdrawal throughout the entire process, improving operational efficiency and reducing the chance of surgical infection.

[0057] Through the description of the specific implementation methods, a deeper and more specific understanding of the technical means and effects adopted by the present invention to achieve the intended purpose should be obtained. However, the accompanying drawings are only for reference and illustration purposes and are not intended to limit the present invention.

Claims

1. A safety protection tearable sheath, comprising a sheath body and a sheath tail, characterized in that: The tail of the sheath tube is provided with a predetermined tearing groove, and the predetermined tearing groove is opened from the outer wall to the inner wall of the tail of the sheath tube; The sheath body is provided with an escape slit penetrating the outer wall of the sheath body, the escape slit penetrates the wall of the sheath body, and the escape slit starts from the predetermined tearing groove and penetrates along the sheath body to the head opening of the sheath body, so that the sheath body is in the shape of a column with an open opening; The tail portion of the sheath tube is further provided with a predetermined folding groove, the predetermined folding groove is opened from the outer wall toward the inner wall of the tail portion of the sheath tube, and the predetermined folding groove is opened in the opposite direction of the predetermined tearing groove; The predetermined tearing groove and the predetermined folding groove are used to completely tear the predetermined tearing groove and not tear the predetermined folding groove, and to fold the predetermined folding groove toward the outside of the tail of the sheath tube; The predetermined folding groove is 180 degrees relative to the predetermined tearing groove; the width of the predetermined folding groove is greater than the width of the predetermined tearing groove; in the sheath body, the sheath wall starting from the predetermined folding groove at the tail of the sheath tube and toward the head of the sheath tube body remains intact; The thickness of the predetermined tearing groove is smaller than the thickness of the sheath tube tail, and the thickness of the predetermined folding groove is smaller than the thickness of the sheath tube tail; The tail of the sheath tube is further provided with two tearing handles, which are arranged opposite to each other and are respectively arranged on both sides of the predetermined tearing groove.

2. The safety protection tearable sheath according to claim 1, characterized in that: The thickness of the predetermined tearing groove is 50%-90% of the thickness of the sheath tube tail.

3. The safety protection tearable sheath according to claim 1, characterized in that: The thickness of the predetermined folding channel is 30%-80% of the thickness of the sheath tube tail.

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