Tearable sheathing canal and catheter sheath

Abstract

The utility model relates to the technical field of medical instruments, in particular to a tearable sheathing canal and a catheter sheath, the tearable sheathing canal is in the shape of a long tube, one end of the sheathing canal is connected with a sheath base to serve as a near end A, the other end of the sheathing canal is a far end B, a tearing line is arranged in the length direction extending from the near end A to the far end B, and the tearable sheathing canal is in the shape of a long tube. The tearing line is composed of a plurality of thinning grooves and prompting sections, the thinning grooves and the prompting sections are distributed at intervals, and the prompting sections are used for prompting the tearing degree. The tearing line is arranged in the sheath tube, the tearing direction of the sheath tube is guided, meanwhile, the tearing line is divided into the thinning groove and the prompting section, and the thinning groove and the prompting section are distributed at intervals, so that medical staff can stop at the prompting section after tearing a section of the thinning groove, and the medical staff can be prevented from being damaged. That is to say, the medical staff can easily judge the position where the medical staff is torn through the prompt of the prompt section, and meanwhile, the situation that the medical staff tear the sheath part in the body to damage the wound due to excessive force is avoided.

Description

Technical Field

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

[0002] The catheter sheath is an important auxiliary guiding device for peripheral and intracardiac minimally invasive interventional surgery. It is used to establish a connection channel between human blood vessels and the outside world during interventional surgeries such as thrombectomy, percutaneous coronary intervention, and percutaneous interventional occlusion, thereby assisting the delivery tube to deliver diagnostic and treatment equipment to the lesion site. The catheter sheath commonly used in interventional treatment is composed of a sheath seat and a dilator. During use, the catheter sheath is first inserted into the human blood vessel using the dilator and guidewire, and then the dilator is withdrawn, and the medical device to be inserted, such as a catheter, is delivered into the human body through the sheath. After use, the medical device is first withdrawn from the human body through the sheath, and then the sheath seat is torn open, and the sheath is torn open and gradually withdrawn from the body. The tearable catheter sheath can facilitate the intubation process while reducing damage to the human body, and is suitable for a variety of interventional surgical operations.

[0003] However, in the process of tearing and withdrawing the sheath, medical staff need to pay attention to the force required for tearing. If the force is too great, the part of the sheath that has not been withdrawn from the body will be torn, which will expand the wound and cause damage to the human body. If the force is too small, it will waste the time and energy of medical staff and affect the progress of the operation. Utility Model Content

[0004] In response to the above technical problems, the present application provides a tearable sheath and a catheter sheath.

[0005] According to a first aspect of one or more embodiments of the present application, a tearable sheath is provided, which is in the shape of a long tube, wherein one end of the sheath is connected to a sheath seat as a proximal end A, and the other end is a distal end B. A tear line is arranged in the length direction extending from the proximal end A to the distal end B, and the tear line is composed of a plurality of thinning grooves and a prompt segment, wherein the thinning grooves and the prompt segment are spaced apart, and the prompt segment is used to indicate the degree of tearing.

[0006] Preferably, the cross-sectional configuration of the thinning groove is semicircular, U-shaped or V-shaped.

[0007] Preferably, the length of the thinning groove gradually increases from the proximal end A to the distal end B of the sheath.

[0008] Preferably, the lengths of the prompt segments are the same.

[0009] Preferably, the length of the prompt section is shorter than the minimum length of the thinning groove.

[0010] Preferably, two mutually symmetrical tear lines are arranged around the center line of the sheath tube.

[0011] Preferably, four equidistantly distributed tear lines are arranged around the center line of the sheath tube.

[0012] According to a second aspect of one or more embodiments of the present application, a catheter sheath is provided, wherein the catheter sheath uses an optional tearable sheath tube as described above.

[0013] The present application sets a tear line in the sheath to guide the tearing direction of the sheath. At the same time, the tear line is divided into a thinning groove and a prompt segment. The thinning groove and the prompt segment are spaced apart. After tearing a section of the thinning groove, the medical staff will stop at the prompt segment. That is, the medical staff can easily judge where they have torn through the prompt of the prompt segment, and at the same time avoid the medical staff from using too much force to tear the part of the sheath that is still in the body and damage the wound. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present application is further described below in conjunction with the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of a tearable sheath structure according to an exemplary embodiment of the present application;

[0016] Figure 2 This is a schematic diagram of a tearable sheath structure according to another exemplary embodiment of the present application;

[0017] Figure 3 A schematic top view of a tearable sheath according to another exemplary embodiment of the present application;

[0018] Figure 4 A schematic top view of a tearable sheath according to another exemplary embodiment of the present application;

[0019] Figure 5 This is a schematic diagram of the catheter sheath structure of an exemplary embodiment of the present application.

[0020] The numbers in the figure represent:

[0021] 1- tear line, 11- first tear line, 12- second tear line, 13- third tear line, 14- fourth tear line, 2- thinning groove, 21- first thinning groove, 22- second thinning groove, 23- third thinning groove, 24- fourth thinning groove, 243- prompt section. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0023] In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "up", "down", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0024] like Figure 1 , Figure 2 As shown, the present application provides a tearable sheath tube, which is in the shape of a long tube, one end of the sheath tube is connected to the sheath seat as the proximal end A, and the other end is the distal end B. A tear line 1 is arranged in the length direction extending from the proximal end A to the distal end B, and the tear line 1 is composed of a plurality of thinning grooves 2 and a prompt segment 3, the thinning grooves 2 and the prompt segment 3 are distributed at intervals, and the prompt segment 3 is used to indicate the degree of tearing.

[0025] When the tearable sheath provided by the present application is used for the catheter sheath, the medical staff holds the sheath seat and inserts the dilator into the sheath seat according to the predetermined path. After the puncture is completed, the dilator and the guide wire are withdrawn, and then the corresponding medical device is introduced through the sheath. At this time, the sheath plays the role of supporting the passage and protecting the medical device. After the medical device is inserted, the connection with the external processing working environment can be opened by rotating the three-way valve, and contrast agent or saline or other agents can be injected. After the operation is completed, the three-way valve is rotated to close the external processing, and the medical device is withdrawn from the human body through the sheath, and then the sheath seat is torn open, and the sheath is torn open and gradually withdrawn from the body.

[0026] In the process of tearing and withdrawing the sheath, medical staff need to pay attention to the force required for tearing. If the force is too great, the part of the sheath that has not been withdrawn from the body will be torn, which will expand the wound and cause damage to the human body. If the force is too small, it will waste the time and energy of medical staff and affect the operation process. This application sets a tear line in the sheath to guide the tearing direction of the sheath. At the same time, the tear line is divided into a thinning groove and a prompt segment. When the sheath is torn, the thinning groove with a smaller thickness will be destroyed first, which is convenient for medical staff to tear. At the same time, the thinning groove and the prompt segment are spaced apart. After tearing a section of the thinning groove, the medical staff will stop at the prompt segment, prompting the medical staff to withdraw part of the sheath first and then continue to tear the sheath outside the body. That is, the medical staff can easily judge where they have torn through the prompt of the prompt segment, and at the same time avoid the medical staff from using too much force to tear the part of the sheath that is still in the body and damage the wound.

[0027] The thinning groove 2 refers to a groove or thin-walled area cut or processed on the outer surface of the sheath. The thickness of the thinning groove 2 is less than the thickness of other parts of the sheath. When the sheath is torn, the thinning groove 2 with a smaller thickness will be destroyed first. Therefore, by setting a tear line 1 with a thinning groove 2, specific tearing direction control can be achieved, thereby improving the tearability of the sheath.

[0028] In a specific embodiment, the sheath is made of a hard polymer material. Hard polymer materials are a type of polymer material with high strength, hardness and rigidity, and have a certain structural strength. Common hard polymer materials such as polypropylene (PP) have good wear resistance, chemical stability and mechanical properties, polyethylene (PE) has good corrosion resistance and insulation performance, polyvinyl chloride (PVC) has excellent corrosion resistance, insulation and weather resistance, polystyrene (PS) is a transparent, hard hard polymer material with good impact resistance and rigidity, polycarbonate (PC) is a transparent, high temperature resistant hard polymer material with excellent impact resistance and mechanical properties, polyetheretherketone (PEEK) has excellent high temperature resistance, chemical stability and mechanical properties. The above materials or other hard polymer materials can be used in this application as the material of the structural layer 1, and this application is not limited to this.

[0029] In a specific embodiment, the sheath is made of PE / PTFE material. Polytetrafluoroethylene (PTFE) is a high-performance polymer material, which is polymerized from fluorine atoms and ethylene monomers. It has the characteristics of chemical resistance, low friction coefficient, good heat resistance, excellent electrical properties, biocompatibility and non-adhesion, and can be used as a preferred material for the structural layer 1.

[0030] In a specific embodiment, the cross-sectional configuration of the thinning groove 2 is semicircular, U-shaped or V-shaped. Figure 3 , Figure 4 As shown, the cross-sectional configuration of the tear groove 3 is semicircular. In order to make the depth of the tear groove 3 deeper, that is, the tearable part corresponding to the structural layer 1 is thinner, and reduce the difficulty of tearing, the cross-sectional configuration of the tear groove 3 can also be U-shaped or V-shaped. The V-shaped design can concentrate the force to one point, so that medical staff can easily tear the sheath.

[0031] In a specific embodiment, the thinning groove 2 and the prompt section 3 are arranged at intervals, such as Figure 1 As shown, the tear line 1 has 8 thinning grooves 2 and 7 prompt segments. Figure 2 As shown, the tear line 1 has four thinning grooves 2 and three prompting segments. Thinning grooves and prompting segments of different lengths can be provided according to the actual application requirements of the sheath tube, and their specific lengths and numbers should not be a limitation of the present application.

[0032] In a specific embodiment, the length of the thinning groove 2 gradually increases from the proximal end A of the sheath to the distal end B. In the process of withdrawing the sheath from the human body, the sheath needs to be pulled out and torn more carefully in the early stage because the sheath is deep into the human body for a long time. After the sheath is gradually withdrawn, the force of tearing the sheath and the tearing length of each tearing of the sheath can be gradually increased to improve efficiency. Therefore, if Figure 2 As shown, the tear line 1 has four thinning grooves 2, which are the first thinning groove 21, the second thinning groove 22, the third thinning groove 23, and the fourth thinning groove 24 from end A to end B, and are arranged from long to short according to length as the fourth thinning groove 24, the third thinning groove 23, the second thinning groove 22 and the first thinning groove 21.

[0033] In a specific embodiment, the lengths of the prompt segments 3 are the same. Figure 1 , 2 As shown, the multiple prompt segments 3 are all set to the same length, which is to help medical personnel master and become familiar with the position of tearing the prompt segment 3 and the force required to continue tearing the prompt segment 3.

[0034] In a specific embodiment, the length of the prompt segment 3 is less than the minimum length of the thinning groove 2. The thickness of the prompt segment 3 is the same as the thickness of the other parts of the sheath except the thinning groove 2. Therefore, the length of the prompt segment 3 cannot affect the normal tearing of the sheath, as long as its length can play a role in reminding medical staff of the degree of tearing. In a specific embodiment, the length of the sheath is 20 cm, the length of the prompt segment 3 is 0.5 cm, the length of the thinning groove 2 is 3 cm, and the sheath has 5 prompt segments 3 and 6 thinning grooves 2, and the prompt segments 3 and the thinning grooves 2 are spaced apart.

[0035] In a specific embodiment, two symmetrical tear lines 1 are arranged around the center line of the sheath. Figure 3 As shown, two symmetrical tear lines 1 are located at the end points of the diameter of the sheath tube when viewed from a top view, so that the sheath tube can be easily torn into two from the proximal end A to the distal end B.

[0036] In a specific embodiment, four tear lines 1 are arranged equidistantly around the center line of the sheath. Figure 4 As shown, four equally spaced tear lines 1 are located at four end points at both ends of two mutually perpendicular diameters of the sheath tube when viewed from a top view. Figure 4The tear line 1 in the figure includes a first tear line 11, a second tear line 12, a third tear line 13 and a fourth tear line 14. The medical staff can tear the sheath tube left and right, that is, tear the sheath tube from the proximal end A to the distal end B along the first tear line 11 and the third tear line 13, or tear the sheath tube from the proximal end A to the distal end B along the second tear line 12 and the fourth tear line 14. When tearing the sheath tube, the medical staff usually needs to tear the sheath tube from the middle to the left and right sides for the convenience of exerting force. However, after the sheath tube is inserted into the body, Figure 3 The positions of the tear lines 1 shown are not necessarily at the upper and lower endpoints, which usually makes it difficult for medical personnel to exert force. If the sheath is rotated, it may cause physical injury to the patient. Therefore, four equidistantly distributed tear lines 1 allow medical personnel to choose a group of tear lines 1 that is more convenient to exert force for tearing.

[0037] The present application also provides a catheter sheath, which uses the tearable sheath tube in the above specific embodiment.

[0038] Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application.

Claims

1. A tearable sheath, characterized in that: The tearable sheath is in the shape of a long tube, one end of the sheath is connected to the sheath seat as the proximal end A, and the other end is the distal end B. A tear line (1) is provided in the length direction extending from the proximal end A to the distal end B. The tear line (1) is composed of a plurality of thinning grooves (2) and a prompt segment (3). The thinning grooves (2) and the prompt segment (3) are distributed at intervals. The thickness of the thinning grooves (2) is less than the thickness of other parts of the sheath, and the prompt segment (3) is used to indicate the degree of tearing.

2. The tearable sheath according to claim 1, characterized in that: The cross-sectional configuration of the thinning groove (2) is semicircular, U-shaped or V-shaped.

3. The tearable sheath according to claim 1, characterized in that: The length of the thinning groove (2) gradually increases from the proximal end A of the sheath tube to the distal end B.

4. The tearable sheath according to claim 1, characterized in that: The lengths of the prompt segments (3) are the same.

5. The tearable sheath according to claim 4, characterized in that: The length of the prompt section (3) is shorter than the minimum length of the thinning groove (2).

6. The tearable sheath according to claim 1, characterized in that: Two mutually symmetrical tear lines (1) are arranged around the center line of the sheath tube.

7. The tearable sheath according to claim 1, characterized in that: Four tear lines (1) are arranged equidistantly around the center line of the sheath tube.

8. A catheter sheath, characterized in that: The catheter sheath uses the tearable sheath tube according to any one of claims 1 to 7.

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