Sterile isolation cover of interventional instrument

Abstract

The utility model relates to the technical field of medical instruments, in particular to a sterile isolation hood of an interventional instrument, the sterile isolation hood is a flexible bag, and the sterile isolation hood comprises a hood opening end with an open structure and a hood tail end with a closed structure; the sterile isolation cover has a folded state and an unfolded state; in the unfolded state, from the cover opening end to the cover tail end, the sterile isolation cover comprises a cover front portion, a cover middle portion and a cover rear portion, and the width size of the cover front portion is larger than or equal to the width size of the cover middle portion and larger than or equal to the width size of the cover rear portion. In the storage state, the cover middle part and the cover rear part are folded and stored in the cover front part, the outer surface of the cover middle part is adjacent to the outer surface of the cover rear part, and the inner surface of the cover middle part is adjacent to the inner surface of the cover front part. According to the scheme, the risk of cross contamination of the sterile isolation cover can be reduced, and the sterile effect of the sterile isolation cover is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a sterile isolation cover of an interventional instrument. Background Art

[0002] The sterile isolation cover for interventional instruments is a key medical device that completely isolates the surgical area from the external environment, thereby effectively protecting the surgical area and surgical instruments from contamination by bacteria and microorganisms. This not only reduces the risk of contamination during surgery, but also improves the safety and success rate of surgery.

[0003] However, there are some problems with the existing sterile isolation cover during use. The sterile isolation cover usually needs to be opened from the inside by medical staff and then covered on the surgical instruments. However, during the process of opening the sterile isolation cover, personnel may come into contact with the inside of the sterile isolation cover, which can easily lead to the entry of bacteria, thereby creating the risk of cross contamination. This greatly reduces the effectiveness of the sterile isolation cover and may even pose a threat to the success of the operation and the safety of the patient. Utility Model Content

[0004] The utility model provides a sterile isolation cover for an interventional instrument, which is used to solve the defect in the prior art that the interior of the sterile isolation cover is easily contaminated by contact during operation, thereby reducing the risk of cross contamination of the sterile isolation cover and improving its sterility effect.

[0005] The utility model provides a sterile isolation cover for an interventional instrument, wherein the sterile isolation cover is a flexible bag, and comprises a cover mouth end with an open structure and a cover tail end with a closed structure; the sterile isolation cover has a storage state and an expanded state; in the expanded state, from the cover mouth end to the cover tail end, the sterile isolation cover comprises a cover front part, a cover middle part and a cover rear part, and the width dimension of the cover front part is greater than or equal to the width dimension of the cover middle part and greater than or equal to the width dimension of the cover rear part; in the storage state, the cover middle part and the cover rear part are folded and stored in the cover front part, the outer surface of the cover middle part is adjacent to the outer surface of the cover rear part, and the inner surface of the cover middle part is adjacent to the inner surface of the cover front part.

[0006] According to the utility model, a sterile isolation cover for an interventional instrument comprises an expanded cover body; the expanded cover body is arranged at the rear end of the cover, or at the edge of the cover body between the cover mouth end and the cover rear end; the expanded cover body has an expanded state and a folded state; in the folded state, the expanded cover body is folded and arranged on one side of the sterile isolation cover; in the expanded state, the expanded cover body is unfolded, and an expanded space connected to the inner space of the sterile isolation cover is formed in the expanded cover body.

[0007] According to the sterile isolation cover of an interventional instrument provided by the utility model, a positioning structure for positioning and cooperating with the working end of the interventional instrument is arranged at the rear of the cover; the positioning structure includes one or more positioning holes, and the positioning holes can be sleeved on the pin-type structure of the working end.

[0008] According to the sterile isolation cover of an interventional instrument provided by the utility model, a sleeve is provided on at least a portion of the positioning holes; when the positioning holes in this portion are sleeved on the pin-like structure, the sleeve is covered on the end of the pin-like structure.

[0009] According to the sterile isolation cover of an interventional instrument provided by the utility model, an intermittent cutting line is arranged between the shaft sleeve and the rear portion of the cover to form a fragile connection between the shaft sleeve and the rear portion of the cover.

[0010] According to the sterile isolation cover of an interventional instrument provided by the utility model, the positioning structure includes one or more adhesive strips adhered to the rear part of the cover.

[0011] According to the sterile isolation cover of an interventional instrument provided by the utility model, the positioning structure includes an avoidance hole allowing the output shaft of the working end to pass through; at least a portion of the adhesive strip is adhered to a position adjacent to the avoidance hole.

[0012] According to the sterile isolation cover of an interventional instrument provided by the utility model, the back adhesive strip includes a strong adhesive layer and a weak adhesive layer; the strong adhesive layer is adhered to the inner surface of the bag body at the rear of the cover, and the weak adhesive layer faces away from the inner surface of the bag body at the rear of the cover.

[0013] According to a sterile isolation cover of an interventional instrument provided by the utility model, a positioning area is provided at the rear of the cover, the positioning structure is located in the positioning area, and the positioning area is adjacent to the rear end of the cover; the sterile isolation cover includes a sealing cover, and the sealing cover is detachably fitted in the positioning area and covers the positioning structure.

[0014] According to a sterile isolation cover of an interventional instrument provided by the utility model, the middle portion of the cover includes a first diameter-changing section, and the width of the first diameter-changing section gradually decreases in the direction from the cover mouth end to the cover tail end; and / or the rear portion of the cover includes a second diameter-changing section, and the width of the second diameter-changing section gradually decreases in the direction from the cover mouth end to the cover tail end.

[0015] The sterile isolation cover of the interventional instrument provided by the utility model has a storage state and an unfolded state, so that medical staff can easily unfold it and put it on the interventional instrument when it is needed. In the storage state, the middle and rear parts of the sterile isolation cover are folded and stored in the front part, which helps to keep the sterile isolation cover clean and sterile, and because the width dimension of the front part of the cover is greater than or equal to the width dimension of the middle part of the cover is greater than or equal to the width dimension of the rear part of the cover, the sterile isolation cover is not easy to wrinkle in the storage state. Medical staff can open the sterile isolation cover by inserting their hands between the outer surface of the rear part of the cover and the outer surface of the middle part of the cover, without touching the inner surface of the sterile isolation cover, and unfold the rear part of the cover, the middle part of the cover and the front part of the cover in sequence and put them on the interventional instrument. This unfolding method can avoid contact between the hands and the inside of the sterile isolation cover, so it can reduce the risk of cross contamination of the sterile isolation cover and improve its sterile effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of the storage state of the sterile isolation cover of the interventional instrument provided by the utility model;

[0018] Figure 2 yes Figure 1 A schematic cross-sectional view of the sterile isolation cover of the interventional instrument in a stored state;

[0019] Figure 3 It is a structural schematic diagram of the sterile isolation cover of the interventional instrument provided by the utility model in an unfolded state;

[0020] Figure 4 It is a partially enlarged schematic diagram of the positioning structure of the sterile isolation cover of the interventional instrument provided by the utility model;

[0021] Figure 5 It is a partially enlarged schematic diagram of a shaft sleeve of a sterile isolation cover of an interventional instrument provided by the utility model;

[0022] Figure 6 It is a structural schematic diagram of the extended cover body of the sterile isolation cover of the interventional instrument provided by the utility model;

[0023] Reference numerals:

[0024] 101. hood mouth end; 102. hood tail end; 103. extended hood body; 110. hood front; 120. hood middle; 121. first diameter reducing section; 130. hood rear; 131. positioning hole; 132. bushing; 133. intermittent cutting line; 134. adhesive strip; 135. avoidance hole; 136. positioning area; 137. hood cover; 138. second diameter reducing section. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. It should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0027] There are some problems with the existing sterile isolation cover during use. The sterile isolation cover usually needs to be opened from the inside by medical staff and then covered on the surgical instruments. However, during the process of opening the sterile isolation cover, personnel may come into contact with the inside of the sterile isolation cover, which can easily lead to the entry of bacteria, thereby creating the risk of cross-contamination. This greatly reduces the effectiveness of the sterile isolation cover and may even pose a threat to the success of the operation and the safety of the patient.

[0028] Therefore, the utility model provides an improved sterile isolation cover for interventional instruments, which can prevent personnel from contacting the inner side during the expansion process, thereby reducing the risk of cross contamination and improving its sterility effect.

[0029] Combine the following Figure 1-Figure 5 The specific implementation of the sterile isolation cover of the interventional instrument of the utility model is described.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the utility model provides a sterile isolation cover for an interventional instrument, the sterile isolation cover is a flexible bag, the sterile isolation cover comprises a cover mouth end 101 of an open structure and a cover tail end 102 of a closed structure; the sterile isolation cover has a storage state and an expanded state; in the expanded state, from the cover mouth end 101 to the cover tail end 102, the sterile isolation cover comprises a cover front portion 110, a cover middle portion 120 and a cover rear portion 130, the width dimension of the cover front portion 110 is greater than or equal to the width dimension of the cover middle portion 120 is greater than or equal to the width dimension of the cover rear portion 130; in the storage state, the cover middle portion 120 and the cover rear portion 130 are folded and stored in the cover front portion 110, the outer surface of the cover middle portion 120 is adjacent to the outer surface of the cover rear portion 130, and the inner surface of the cover middle portion 120 is adjacent to the inner surface of the cover front portion 110.

[0031] The sterile isolation cover of the above-mentioned interventional instrument has a unique design, which is convenient for medical staff to use and effectively reduces the risk of cross contamination. The sterile isolation cover has a storage state and an unfolded state, which is convenient for medical staff to easily switch according to their needs. In the storage state, the middle and rear parts of the sterile isolation cover are cleverly folded and stored in the front part. This design helps to keep the sterile isolation cover clean and sterile. It is particularly worth mentioning that the width dimension of the front part 110 of the cover is greater than or equal to the width dimension of the middle part 120 of the cover, and the width dimension of the middle part 120 of the cover is greater than or equal to the width dimension of the rear part 130 of the cover. This design detail ensures that the sterile isolation cover is not prone to wrinkles in the storage state and is smoother and neater.

[0032] When the sterile isolation cover is put on the interventional device (such as a robotic arm, guide wire push mechanism, etc.), Figure 2 As shown by the dotted arrow in the figure, the medical staff can insert their hand from one side of the rear end 102 of the cover to open the cover mouth end 101 and put it on the interventional instrument. This operation method can effectively prevent contact with the inner side of the sterile isolation cover and prevent the occurrence of cross infection. During the deployment process, the medical staff only needs to insert their hand into the gap between the outer surface of the rear part 130 of the cover and the outer surface of the middle part 120 of the cover. In this way, the sterile isolation cover can be easily opened without directly contacting the inner surface of the sterile isolation cover, and the rear part 130 of the cover, the middle part 120 of the cover and the front part 110 of the cover can be deployed and put on the interventional instrument in turn. This unique deployment method further reduces the possibility of contact between the hand and the inside of the sterile isolation cover, thereby effectively reducing the risk of cross contamination.

[0033] In order to further enhance the aseptic effect and simplify the operation, the sterile isolation cover is preferably designed as a disposable isolation surgical bag. This disposable mode effectively solves the problem of cross contamination and ensures the aseptic requirements during the operation. At the same time, since the width of the front part 110 of the cover is greater than or equal to the width of the middle part 120 of the cover is greater than or equal to the width of the rear part 130 of the cover in the storage state, folding dead zones or wrinkles can be avoided, thereby improving the sterilization effect of the sterile isolation cover.

[0034] In addition, considering the convenience of production, storage and transportation, sterile isolation covers should be made of materials with antibacterial properties, which can improve the sterility effect and maintain the sterility for a longer time. At the same time, in order to ensure that production and packaging are carried out in a clean environment to reduce the risk of initial contamination, the production process of sterile isolation covers should be carried out in a clean environment and sealed or independently packaged to maintain its sterility.

[0035] like Figure 6 As shown, a sterile isolation cover of an interventional instrument provided by the utility model includes an extended cover body 103; the extended cover body 103 is arranged at the cover tail end 102, or is arranged at the cover body edge position between the cover mouth end 101 and the cover tail end 102; the extended cover body 103 has an extended state and a folded state; in the folded state, the extended cover body 103 is folded and arranged on one side of the sterile isolation cover; in the extended state, the extended cover body 103 is unfolded, and an extended space connected to the inner space of the sterile isolation cover is formed in the extended cover body 103. The extended cover body 103 can cooperate with a surgical robot with a special extension structure. When the surgical robot has special extension components, the extended cover body 103 can be matched and unfolded according to the characteristics of these extension structures, ensuring that whether the instrument is in a conventional form or with a special extension part, it can be fully and effectively protected by sterile isolation, thereby improving the sterile operation standards and compatibility of surgical instruments during the operation.

[0036] Specifically, the expansion cover body 103 provides a space expansion function for the sterile isolation cover of the interventional instrument. The expansion cover body 103 can be set at the cover tail end 102, or at the edge of the cover body between the cover mouth end 101 and the cover tail end 102 according to actual application requirements, and has a folded state and an expanded state. In the folded state, the expansion cover body 103 can be close to and folded on one side of the sterile isolation cover without affecting conventional use and storage. In the expanded state, the expansion cover body 103 can be opened to form an additional space-an expansion space, which is connected to the inner space of the sterile isolation cover, thereby increasing the operating area that can accommodate the instrument. Preferably, the expansion cover body 103 can be provided with a hole structure or other positioning and matching structure that matches the extension structure of the surgical robot.

[0037] Further, in the folded state, a temporary adhesive sticker may be provided between the expanded cover body 103 and the cover body of the sterile isolation cover to maintain the folded state of the expanded cover body 103 when not in use. When in use, the expanded cover body 103 can be unfolded to the expanded state by tearing off the temporary adhesive sticker.

[0038] According to the sterile isolation cover of an interventional instrument provided by the utility model, in order to reduce the difficulty of operating the sterile isolation cover, the rear part 130 of the cover is preferably provided with a positioning structure for positioning and cooperating with the working end of the interventional instrument. The positioning structure can not only keep the rear part 130 of the cover in position with the working end of the interventional instrument during the unfolding process of the sterile isolation cover, but also prevent the interventional instrument from moving during the operation, causing the sterile isolation cover to move out of position.

[0039] like Figure 3 As shown, according to a sterile isolation cover of an interventional instrument provided by the utility model, the above-mentioned positioning structure preferably includes one or more positioning holes 131, and the positioning hole 131 can be sleeved on a pin-type structure at the working end. The positioning hole 131 can be sleeved on a pin-type structure, and the pin-type structure can be a positioning pin specially designed for the positioning function, or a mechanical structure protrusion that can cooperate with the positioning hole 131. When the positioning hole 131 is sleeved on a pin-type structure, it can achieve the positioning relationship between the rear part 130 of the cover and the working end of the interventional instrument during the deployment of the sterile isolation cover. In addition, this design can also prevent the interventional instrument from moving during the operation, thereby avoiding the occurrence of misalignment of the sterile isolation cover. This positioning mechanism helps to ensure accuracy and sterility requirements during the operation.

[0040] like Figure 4 and Figure 5 As shown, according to a sterile isolation cover of an interventional instrument provided by the utility model, a sleeve 132 is provided on at least a portion of the above-mentioned positioning holes 131. In the case where the positioning holes 131 of this part are sleeved on a pin-type structure, the sleeve 132 is covered on the end of the pin-type structure. Considering that the working end of the interventional instrument may include a shaft-type structure for performing surgical actions, the shaft-type structure needs to be installed and matched with other transmission parts after the preliminary preparation of the device is completed, so the isolation function of the sterile isolation cover is necessary in this process to prevent the shaft-type structure from being contaminated before the transmission parts are installed.

[0041] By setting the above-mentioned sleeve 132, the end of the pin-like structure can be protected during the process of setting the sterile isolation cover to prevent it from being contaminated by the outside world. Once the sterile isolation cover is set, the sleeve 132 can be cut or removed to continue the installation process of the transmission part and the shaft structure. Such a design ensures that the sterile isolation cover provides effective protection for the shaft structure of the interventional instrument during the setting process, while ensuring the cleanliness and sterility of the surgical instrument.

[0042] like Figure 5 As shown, according to a sterile isolation cover of an interventional instrument provided by the utility model, an intermittent cutting line 133 is preferably provided between the shaft sleeve 132 and the cover rear portion 130 to form a fragile connection between the shaft sleeve 132 and the cover rear portion 130. Compared with other bag structures of the sterile isolation cover, the shaft sleeve 132 and the cover rear portion 130 after intermittent cutting are more likely to break under the action of external force, thereby forming a fragile connection.

[0043] By means of the fragile connection structure of the intermittent cutting line 133, when the sleeve 132 needs to be removed, the medical staff can easily disconnect the connection structure between the sleeve 132 and the rear part 130 of the cover by pulling. Therefore, the difficulty of operating the sterile isolation cover can be reduced. It is understandable that in addition to the structure of the intermittent cutting line 133, other fragile connection structures can also be used to achieve the purpose, such as thinning the sleeve 132 and the rear part 130 of the cover.

[0044] like Figure 4 As shown, according to a sterile isolation cover of an interventional instrument provided by the utility model, the positioning structure preferably includes one or more adhesive strips 134 attached to the rear portion 130 of the cover. Both sides of the adhesive strip 134 are sticky, one side of which is attached to the inner surface of the rear portion 130 of the sterile isolation cover, and the other side of the adhesive strip 134 is attached to the working end of the interventional instrument during the process of setting the sterile isolation cover, thereby forming an adhesive fixation.

[0045] Furthermore, according to a sterile isolation cover of an interventional instrument provided by the utility model, the positioning structure includes an avoidance hole 135 that allows the output shaft of the working end to pass through; at least a portion of the adhesive strip 134 is pasted to the adjacent position of the avoidance hole 135. The output shaft of this part of the working end may perform a rotation or telescopic action during the operation of the interventional instrument. In order to prevent the output shaft from causing the sterile isolation cover to be moved or worn during the action, the avoidance hole 135 needs to maintain a reliable positioning position. By pasting the adhesive strip 134 to the adjacent position of the avoidance hole 135, an adhesive positioning effect can be provided around the avoidance hole 135 to prevent the avoidance hole 135 from shifting.

[0046] According to the sterile isolation cover of an interventional instrument provided by the utility model, preferably, the back adhesive strip 134 includes a strong adhesive layer and a weak adhesive layer. The strong adhesive layer is adhered to the inner surface of the bag body of the cover rear part 130, and the weak adhesive layer faces away from the inner surface of the bag body of the cover rear part 130. The strong adhesive layer has a strong viscosity and is not easy to be separated from the inner surface of the bag body; the weak adhesive layer has a low viscosity and is adhered to the working end of the interventional instrument. After the operation is completed, the disposable isolation bag can be easily pulled up for replacement.

[0047] like Figure 3As shown, according to a sterile isolation cover of an interventional instrument provided by the utility model, a positioning area 136 is provided at the rear portion 130 of the cover, and the positioning structure of any of the above-mentioned embodiments is located in the positioning area 136, and the positioning area 136 is adjacent to the cover tail end 102. The sterile isolation cover preferably includes a sealing cover 137, which is detachably fitted in the positioning area 136 and covers the positioning structure to prevent external contamination from invading the sterile isolation cover through the positioning structure. In actual use, before setting the sterile isolation cover, the sealing cover 137 is opened, and during the process of setting the sterile isolation cover, the positioning structure is matched with the working end of the interventional instrument.

[0048] like Figure 3 As shown, according to the sterile isolation cover of an interventional instrument provided by the utility model, the middle part 120 of the cover includes a first diameter-reducing section 121, and the width of the first diameter-reducing section 121 gradually decreases from the cover mouth end 101 to the cover tail end 102; and / or the rear part 130 of the cover includes a second diameter-reducing section 138, and the width of the second diameter-reducing section 138 gradually decreases from the cover mouth end 101 to the cover tail end 102. Through the first diameter-reducing section 121 and / or the second diameter-reducing section 138, the sterile isolation cover is not easy to generate wrinkles in the storage state, and is smoother and neater. Especially during the production process, when the middle part 120 of the cover is folded toward the front part 110 of the cover, the transition shape of the first variable diameter section 121 can be used to reduce the folding difficulty and improve the coordination effect between the middle part 120 and the front part 110 of the cover; similarly, when the rear part 130 of the cover is folded toward the front part 110 and the middle part 120 of the cover, the transition shape of the second variable diameter section 138 can be used to reduce the folding difficulty and improve the coordination effect between the rear part 130 of the cover, the middle part 120 of the cover and the front part 110 of the cover, thereby avoiding the occurrence of folding dead zones.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A sterile isolation cover for an interventional device, characterized in that: The sterile isolation cover is a flexible bag, and comprises a cover mouth end (101) of an open structure and a cover tail end (102) of a closed structure; The sterile isolation cover has a stowed state and an unfolded state; In the unfolded state, from the cover mouth end (101) to the cover tail end (102), the sterile isolation cover comprises a cover front portion (110), a cover middle portion (120) and a cover rear portion (130), and the width dimension of the cover front portion (110) is greater than or equal to the width dimension of the cover middle portion (120) is greater than or equal to the width dimension of the cover rear portion (130); In the storage state, the middle part (120) of the cover and the rear part (130) of the cover are folded and stored in the front part (110) of the cover, the outer surface of the middle part (120) of the cover is adjacent to the outer surface of the rear part (130) of the cover, and the inner surface of the middle part (120) of the cover is adjacent to the inner surface of the front part (110) of the cover.

2. The sterile isolation cover for interventional instrument according to claim 1, characterized in that: It includes an expansion cover body (103); The extended cover body (103) is arranged at the cover tail end (102), or at the cover body edge position between the cover mouth end (101) and the cover tail end (102); The expansion cover body (103) has an expansion state and a folded state; In the folded state, the expansion cover body (103) is folded and arranged on one side of the sterile isolation cover; In the expanded state, the expanded cover body (103) is unfolded, and an expanded space communicating with the inner space of the sterile isolation cover is formed in the expanded cover body (103).

3. The sterile isolation cover for interventional instrument according to claim 1, characterized in that: The rear portion (130) of the cover is provided with a positioning structure for positioning and cooperating with the working end of the interventional instrument; The positioning structure comprises one or more positioning holes (131), and the positioning holes (131) can be sleeved on the pin-like structure of the working end.

4. The sterile isolation cover for interventional instrument according to claim 3, characterized in that: A shaft sleeve (132) is provided on at least a portion of the positioning holes (131); When the positioning hole (131) in this part is sleeved on the pin-like structure, the sleeve (132) is wrapped around the end of the pin-like structure.

5. The sterile isolation cover for interventional instrument according to claim 4, characterized in that: An intermittent cutting line (133) is provided between the shaft sleeve (132) and the rear portion (130) of the cover to form a fragile connection between the shaft sleeve (132) and the rear portion (130) of the cover.

6. The sterile isolation cover for interventional instrument according to claim 3, characterized in that: The positioning structure includes one or more adhesive strips (134) adhered to the rear portion (130) of the cover.

7. The sterile isolation cover for interventional instrument according to claim 6, characterized in that: The positioning structure comprises an avoidance hole (135) allowing the output shaft of the working end to pass through; At least a portion of the adhesive strip (134) is adhered to a position adjacent to the avoidance hole (135).

8. The sterile isolation cover for interventional instrument according to claim 6, characterized in that: The back adhesive strip (134) comprises a strong adhesive layer and a weak adhesive layer; The strong adhesive layer is adhered to the inner surface of the bag body at the rear part (130) of the cover, and the weak adhesive layer faces away from the inner surface of the bag body at the rear part (130) of the cover.

9. The sterile isolation cover for an interventional instrument according to any one of claims 3 to 8, characterized in that: The rear portion (130) of the cover is provided with a positioning area (136), the positioning structure is located in the positioning area (136), and the positioning area (136) is adjacent to the rear end (102) of the cover; The sterile isolation cover comprises a sealing cover (137), and the sealing cover (137) is detachably fitted in the positioning area (136) and covers the positioning structure.

10. The sterile isolation cover for interventional instrument according to claim 1, characterized in that: The middle portion (120) of the cover comprises a first diameter-changing section (121), and the width of the first diameter-changing section (121) gradually decreases in the direction from the cover mouth end (101) to the cover tail end (102); And / or, the rear portion (130) of the cover comprises a second diameter-changing section (138), and the width dimension of the second diameter-changing section (138) gradually decreases in the direction from the cover mouth end (101) to the cover tail end (102).

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