CN219306864U - Positioning sheath - Google Patents

Abstract

The present utility model provides a positioning sheath comprising: the positioning structure is used for fixing the sheath tube to a target object, the positioning structure is movably arranged around the outer surface of the sheath tube, and the length of the positioning structure in the axial direction of the sheath tube is adjustable so as to adjust the depth of the sheath tube extending into the target object. According to the positioning sheath provided by the utility model, the sheath insertion position and the sheath insertion depth are adjusted through the positioning structure, so that the purpose of accurate puncture can be achieved.

Description

Positioning sheath

Technical Field

The utility model relates to the technical field of medical treatment, in particular to a positioning sheath.

Background

In interventional surgery, when vascular puncture is performed by using a sheath, the puncture angle needs to be fixed, and the penetration of puncture varies from individual to individual. In addition, because the total length of the sheath tube is longer, the length of the sheath tube which finally enters the blood vessel can be only one fifth of the total length of the sheath tube, in this case, during operation, instruments can be introduced into the sheath tube after the sheath tube is fixed, and the sheath tube is easy to fall out, position migration and the like. Various complications such as bleeding, hematoma at puncture point and the like can be caused by the sheath tube falling out; and the position migration of the sheath can lead to a plurality of problems such as small operable space in the blood vessel, incapability of placing instruments, failure of operation and the like. It is therefore desirable to provide a new positioning sheath that addresses one or more of the problems described above.

Disclosure of Invention

The present utility model is directed to a positioning sheath that achieves accurate penetration, and stable fixation to address one or more of the problems of the prior art.

In order to solve the above problems, the positioning sheath provided by the present utility model includes: the distal end of the positioning structure is used for being attached to a target object, the positioning structure is movably arranged around the outer surface of the sheath, and the axial length of the positioning structure is adjustable so as to adjust the depth of the sheath extending into the target object.

Optionally, in the positioning sheath, the distal end of the positioning structure has a bonding surface, where the bonding surface is used to bond to a target object, and the bonding surface and the axial direction of the sheath tube are arranged in a relatively inclined manner, so as to define the puncture angle of the sheath tube.

Optionally, in the positioning sheath, the positioning structure includes a length adjusting portion and a positioning portion, the positioning portion is sleeved on the sheath, the distal end has the fitting surface, the proximal end of the length adjusting portion is fixed with the relative position of the sheath, and the distal end defines the position of the positioning portion on the sheath.

Optionally, in the positioning sheath, the length adjusting part includes a telescopic sleeve, and the telescopic sleeve is sleeved on the sheath.

Optionally, in the positioning sheath, the length adjusting part includes a plurality of buckles detachably connected to the sheath in sequence along an axial direction of the sheath.

Optionally, in the positioning sheath, the positioning portion includes a sleeve and a fixing table protruding from the sleeve along a circumferential direction of the sleeve, and the fixing table has the fitting surface.

Optionally, in the positioning sheath, the fixing table is provided with a first thread hole, and the first thread hole is used for threading a suture thread, so as to fix a position where the positioning part is attached to the target object.

Optionally, in the positioning sheath, the positioning sheath further includes a sheath holder, the sheath holder is connected to a proximal end of the sheath, the sheath holder is provided with a second wire hole, and the second wire hole is used for threading a suture, so as to fix the sheath and the target object.

Optionally, in the positioning sheath, the positioning sheath further comprises a guide wire and a lining tube guiding the guide wire to penetrate, and the lining tube is used for movably penetrating the sheath tube.

Optionally, in the positioning sheath, at least part of the inner liner tube has an outer diameter matching an inner diameter of the sheath tube.

Optionally, in the positioning sheath, the proximal end and the distal end of the tube body of the lining tube are tightly matched with the guide wire, and the rest part of the lining tube is in clearance fit with the guide wire; the sheath tube and the lining tube are respectively provided with a liquid inlet and a liquid outlet which penetrate through the side wall, the liquid inlet of the sheath tube is communicated with the liquid inlet of the lining tube to form a liquid inlet channel, the liquid outlet of the sheath tube is communicated with the liquid outlet of the lining tube to form a liquid outlet channel, the liquid inlet channel is closer to the far end of the sheath tube than the fixing structure, the liquid outlet channel is closer to the near end of the sheath tube than the fixing structure, the liquid inlet channel, the lining tube is communicated with a gap between the guide wires in sequence so as to supply blood to flow from the far end to the near end of the lining tube, and the position of the sheath tube entering the target object is marked.

Optionally, in the positioning sheath, the positioning sheath further includes a side branch communicated with the liquid outlet of the sheath tube, and the side branch is used for connecting a pipeline externally so as to convey fluid into the target object.

Optionally, in the positioning sheath, the distal end of the lining tube is tightly matched with the sheath tube, the sheath tube is provided with a liquid inlet penetrating through the side wall, at least one gap section exists between the lining tube and the sheath tube, the liquid inlet is communicated with the gap section so that blood flows from the distal end to the proximal end of the sheath tube, the proximal end of the sheath tube is provided with at least one indication window, and the indication window is used for identifying the position of the sheath tube entering the target object.

In summary, the positioning sheath provided by the present utility model includes: the distal end of the positioning structure is used for being attached to a target object, the sheath positioning structure is movably arranged around the outer surface of the sheath, and the axial length of the positioning structure is adjustable so as to adjust the depth of the sheath extending into the target object. According to the positioning sheath provided by the utility model, the sheath insertion position and the sheath insertion depth are adjusted through the positioning structure, so that the purpose of accurate puncture can be achieved.

Further, the distal end of the positioning structure is provided with a joint surface, the joint surface and the axial direction of the sheath tube are arranged in a relatively inclined manner, and the puncture angle of the sheath tube is limited by joint with a target object, so that the requirements of fixing the sheath tube sheathing angle and adjusting the sheathing depth can be met simultaneously.

Further, the line hole is formed in the portion, attached to the target object, of the positioning structure, so that the relative position between the positioning structure and the target object can be fixed through a suture line, and the relative position between the sheath tube and the target object can be fixed after the sheath tube reaches the target position, and the sheath tube is not easy to break out or migrate.

Drawings

FIG. 1 is a schematic view of a positioning structure according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a positioning portion according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a length adjusting portion according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a positioning sheath according to an embodiment of the present utility model;

FIG. 5 is an enlarged view of region A of the structure shown in FIG. 4;

FIG. 6 is an enlarged view of region B of the structure shown in FIG. 5;

fig. 7 is a schematic view illustrating a state of the positioning sheath in the positioning process according to the embodiment of the present utility model;

fig. 8 is a schematic view of a positioning sheath according to an embodiment of the present utility model after positioning;

wherein, each reference sign is explained as follows:

101-lining a tube; 102-backseat, 103-front seat; 104-a length adjustment section; 105-positioning part; 106-sheath; 107-guidewire; 108-connecting an external pipeline; 109-headend; 110-a liquid inlet channel; 111-target object; 112-blood vessel; 113-an abutting surface; 114-a liquid outlet channel; 115-a sheath hub; 1151-a second wire hole; 1041-a first limit part; 1042-limit groove; 1051-cannula; 1052-a stationary stage; 1053-first wire holes; 1054-second stop.

Detailed Description

The inventors have found that, when vascular puncture is performed by using a sheath, there is a difference in the requirements for penetration due to individual differences, and the sheath cannot be completely penetrated in a scene where the penetration depth is small, and therefore, the sheath cannot be fixed by attaching the sheath hub at the proximal end of the sheath to the skin, and the angle of insertion of the sheath cannot be fixed.

In view of this, the core idea of the present utility model is to provide a positioning sheath comprising: the distal end of the positioning structure is used for being attached to a target object, the positioning structure is movably arranged around the outer surface of the sheath, and the axial length of the positioning structure is adjustable so as to adjust the depth of the sheath extending into the target object. The sheath inserting position and the sheath inserting depth are adjusted through the positioning structure, so that the purpose of accurate puncture can be achieved.

Further, the distal end of the positioning structure is provided with a fitting surface, the fitting surface is used for fitting on a target object, and the fitting surface and the sheath are arranged in an axially opposite inclined manner and are used for limiting the puncture angle of the sheath. Therefore, the positioning sheath provided by the utility model can simultaneously meet the requirements of fixing the sheath inlet angle and adjusting the sheath inlet depth of the sheath tube.

The utility model is described in further detail below with reference to the drawings and the specific examples. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments. It should be further understood that the terms "first," "second," "third," and the like in this specification are used merely for distinguishing between various components, elements, steps, etc. in the specification and not for indicating a logical or sequential relationship between the various components, elements, steps, etc., unless otherwise indicated.

In this document, "proximal" and "distal" are relative orientations, relative positions, directions of elements or actions relative to one another from the perspective of a physician using the medical device, although "proximal" and "distal" are not intended to be limiting, and "proximal" generally refers to an end of the medical device that is proximal to the physician during normal operation, and "distal" generally refers to an end that first enters the patient.

Referring to fig. 1 in combination with fig. 2, 3 and 7, in the present embodiment, the positioning structure includes a length adjusting portion 104 and a positioning portion 105. The length adjustment portion 104 is located at a proximal end of the positioning portion 105, an axial length of the length adjustment portion 104 is adjustable, and a distal end of the positioning portion 105 is adapted to be attached to the target object 111.

Referring to fig. 4 in combination with fig. 7, preferably, the positioning portion 105 is sleeved on the sheath 106, and has an attaching surface 113 at a distal end for attaching to the target object 111. When the positioning portion 105 is sleeved on the sheath 106, the distal end surface of the positioning portion 105 is the fitting surface 113 for fitting on the target object 111. When the distal end surface of the positioning portion 105 is attached to the target object 111, the sidewall of the positioning portion 105 forms a fixed angle with the target object 111, and the fixed angle is an angle between the axial direction of the sheath 106 and the target object 111, that is, a puncture angle of the sheath 106. Compared with other fixing methods, such as a method in which the positioning portion 105 is fixed to the outer wall of the sheath 106 in a triangular shape, the sheath 106 can be limited in displacement in the circumferential direction by sleeving, so that the positioning effect is better.

Referring specifically to fig. 2 in combination with fig. 7, further preferably, the positioning portion 105 may include a sleeve 1051 and a fixing stage 1052 protruding from the sleeve 1051 along a circumferential direction of the sleeve 1051, the fixing stage 1052 having an abutment surface 113 for abutment with the target object 111. The provision of the fixed stage 1052 facilitates the fixation of the relative position between the positioning portion 105 and the target object 111. Specifically, the fixing table 1052 may be provided with a first thread hole 1053, the first thread hole 1053 is used for threading a suture, and after the suture passes through the first thread hole 1053, the positioning portion 105 and the target object 111 are stitched together to fix a position where the positioning portion 105 is attached to the target object 111, so as to maintain a relative position between the positioning portion 105 and the target object 111, and further ensure that the sheath 106 is fixed at a relative position between the target position and the target object 111, and the sheath 106 is not easy to be removed or migrated. The outer contour shape of the fixed table 1052 is not limited in this embodiment, and for example, the outer contour of the fixed table 1052 may be circular, square, or the like.

The proximal end of the length adjustment portion 104 is fixed in relative position to the sheath 106 and the distal end defines the relative position of the positioning portion 105 on the sheath 106.

In an alternative embodiment, the length adjustment portion 104 includes a telescoping tube, and the telescoping length of the telescoping tube is adjusted when it is desired to change the length of the sheath 106 into the target object 111. The proximal end of the telescopic tube is fixed to the sheath tube 106, and the distal end abuts against or is connected to the proximal end of the positioning portion 105, and as the compression amount of the telescopic tube 1051 increases, the insertion depth of the sheath tube 106 becomes larger.

Referring to fig. 1 and fig. 2 in particular, in another alternative embodiment, the length adjustment portion 104 includes a plurality of buckles (hereinafter referred to as buckle assemblies) detachably engaged with the sheath 106 in sequence along the axial direction of the sheath 106, and when the length of the length adjustment portion 104 needs to be changed, the number of buckles in the buckle assemblies can be changed. As the number of snaps decreases, the insertion depth of the sheath 106 increases. Optionally, the buckle and the buckle may be connected end to end through a first limiting portion 1041 and a limiting groove 1042 that are configured in a matching manner. In addition, a second limiting portion 1054 may be disposed at the proximal end of the sleeve 1051, and a limiting groove 1042 of the buckle at the most distal end is disposed in cooperation with the second limiting portion 1054, so as to realize connection between the whole length adjusting portion 104 and the positioning portion 105. The first limiting portion 1041 and the second limiting portion 1054 may be protruding portions protruding outwards.

In other embodiments, the length adjustment portion 104 may also include both the telescoping tube and the snap assembly, when both are included, the distal end of the telescoping tube abutting or abutting the proximal end of the positioning portion 105 if the telescoping tube is closer to the positioning portion 105, the proximal end of the telescoping tube abutting the snap assembly; if the clip assembly is closer to the positioning portion 105, the distal end of the clip assembly abuts against the proximal end of the positioning portion 105, and the proximal end abuts against the telescopic tube, but since the telescopic tube has a certain degree of freedom of movement on the sheath tube 106, the proximal end of the telescopic tube needs to be fixed to the sheath tube 106.

Referring to fig. 6, in some embodiments, the sheath 106 further includes a sheath hub 115, the sheath hub 115 is located at a proximal end of the sheath 106, and preferably, the sheath hub 115 is provided with a second wire hole 1151, and the second wire hole 1151 is used for threading a suture to fix a relative position between the sheath 106 and the target object 111. Generally, the sheath 106 has a certain flexibility, and the portion of the sheath 106 located outside the target object 111 is bent, and then the distal end of the sheath is sutured to the target object 111 by using a suture, so that the relative position between the sheath 106 and the target object 111 is further ensured to be fixed.

Referring to fig. 4 and 5, the positioning sheath according to the embodiment of the present utility model further includes a guide wire 107 and a liner tube 101 through which the guide wire 107 is inserted, where a tube body of the liner tube 101 is configured to movably insert through the sheath tube 106 and at least partially has an outer diameter matching an inner diameter of the sheath tube 106.

Specifically, the liner tube 101 may include a head end 109, a body, and a tail shank; the head end 109 has a conical structure, the diameter of the head end 109 gradually decreases from one end close to the body to one end far away from the body, the inner lining pipe 101 is arranged on the sheath pipe 106 in a penetrating manner, the head end 109 extends out of the distal end of the sheath pipe 106, the tail handle extends out of the proximal end of the sheath pipe 106, and the outer side wall of the body is attached to the inner side wall of the sheath pipe 106. The lining pipe 101 can pass through the narrow section rapidly by means of the sheath pipe 106, so that the intervention time is obviously shortened, and the occurrence of complications is obviously reduced.

As shown in fig. 7 and 8, when the puncture is performed, the guide wire 107 and the inner liner 101 enter the target object together with the sheath 106, and after the puncture is completed, the guide wire 107 and the inner liner 101 are withdrawn from the sheath 106, so that other medical devices (such as a balloon catheter) can enter the target position through the inner cavity of the sheath 106, and corresponding operations can be performed.

As described above, when vascular puncture is performed by using the sheath 106, there is a difference in the requirement for penetration due to individual differences. Specifically, in performing vascular puncture, the sheath 106 is required to pass through the target object 111 (typically skin tissue) and then into the blood vessel 112, and the skin tissue thickness varies from individual to individual, resulting in varying depths at which the sheath 106 is required to be punctured. On the other hand, after the sheath 106 enters the blood vessel 112, an operation space for the medical apparatus needs to be reserved, and for different operations, the reserved space may be different, for example, when the balloon catheter passes through the sheath 106 to reach the blood vessel 112 after positioning by using the sheath 106, enough space needs to be ensured for the balloon to stretch. Therefore, it is also necessary to calibrate the position of the sheath 106 into the target object 111 according to the actual requirement.

In an alternative implementation manner, the proximal end and the distal end of the inner liner 101 are tightly matched with the guide wire 107, the rest of the inner liner 101 is in clearance fit with the guide wire 107, the sheath 106 and the inner liner 101 are respectively provided with a liquid inlet and a liquid outlet penetrating through the side wall, the liquid inlet of the sheath 106 and the liquid inlet of the inner liner 101 are communicated to form a liquid inlet channel 110, the liquid outlet of the sheath 106 and the liquid outlet of the inner liner 101 are communicated to form a liquid outlet channel 114, the liquid inlet channel 110 is closer to the distal end of the sheath 106 than the fixing structure, the liquid outlet channel 114 is closer to the proximal end of the sheath 106 than the fixing structure, and the liquid inlet channel 110, the gap between the inner liner 101 and the guide wire 107, and the liquid outlet channel 114 are sequentially communicated to flow from the distal end of the inner liner 101 to the proximal end so as to identify that the blood supply channel 110 enters the target site 111 in the sheath 106. As the penetration depth of the sheath 106 increases, when the blood flows out of the fluid outlet channel 114, it means that the sheath 106 reaches the target position, at this time, the positioning portion 105 is kept in contact with the skin surface, and suturing is performed with a suture thread to fix the relative position between the sheath 106 and the skin.

The distance between the liquid inlet channel 110 and the distal end of the sheath 106 may be adjusted according to practical requirements, for example, the liquid inlet channel may be disposed at a distance of 3-5 cm from the distal end of the sheath 106. The outlet channel 114 may be disposed as close as possible to the proximal end of the sheath 106. For example, the sheath 106 includes a front seat 103 and a rear seat 102, the front seat 103 is used for providing the second wire hole 1151, and the liquid outlet channel is provided in the rear seat 102.

In another alternative embodiment, the distal end of the inner liner 101 is tightly matched with the sheath 106, the sheath 106 has a liquid inlet penetrating through the side wall, at least one gap section exists between the inner liner 101 and the sheath 106, the liquid inlet communicates with the gap section to supply blood from the distal end to the proximal end of the sheath 106, and the proximal end of the sheath 106 has at least one indication window for identifying the position of the sheath entering the target object. The positions of the liquid inlet and the indication window may be referred to the previous alternative embodiment, and will not be described herein.

In addition, the positioning sheath 106 may further include a side branch that is communicated with the liquid outlet of the sheath 106, and is fixed to the rear seat 102, and the side branch is used for connecting with a pipeline 108 to convey fluid, such as physiological saline, into the target object 111, so that during the puncturing process of the sheath 106, the puncturing point can be subjected to anti-inflammation and the like.

In summary, the positioning sheath provided by the present utility model includes: the distal end of the positioning structure is used for being attached to a target object, the sheath positioning structure is movably arranged around the outer surface of the sheath, and the axial length of the positioning structure is adjustable so as to adjust the depth of the sheath extending into the target object. According to the positioning sheath provided by the utility model, the sheath inserting position and the sheath inserting depth are adjusted through the positioning structure, so that the purpose of accurate puncture can be achieved; further, the distal end of the positioning structure is provided with a joint surface, and the joint surface is arranged in an inclined manner relative to the axial direction of the sheath tube, and the puncture angle of the sheath tube is limited by joint with a target object, so that the requirements of fixing the sheath tube sheathing angle and adjusting the sheathing depth can be met at the same time; further, the line hole is formed in the portion, attached to the target object, of the positioning structure, so that the relative position between the positioning structure and the target object can be fixed through a suture line, and the relative position between the sheath tube and the target object can be fixed after the sheath tube reaches the target position, and the sheath tube is not easy to break out or migrate.

The above description is only illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.

Claims (13)

1. The positioning sheath is characterized by comprising a sheath tube and a positioning structure, wherein the distal end of the positioning structure is used for being attached to a target object, the positioning structure is movably arranged around the outer surface of the sheath tube, and the axial length of the positioning structure is adjustable so as to adjust the depth of the sheath tube extending into the target object.

2. The positioning sheath of claim 1, wherein the distal end of the positioning structure has an abutment surface for abutment against a target object, the abutment surface being disposed at an angle relative to the axis of the sheath for defining the puncture angle of the sheath.

3. The positioning sheath of claim 2, wherein the positioning structure comprises a length adjustment portion and a positioning portion, the positioning portion is sleeved on the sheath, the distal end has the abutment surface, the proximal end of the length adjustment portion is fixed relative to the sheath, and the distal end defines the position of the positioning portion on the sheath.

4. The positioning sheath of claim 3 wherein the length adjustment portion comprises a telescoping tube that fits over the sheath.

5. A positioning sheath according to claim 3 wherein the length adjustment portion comprises a plurality of snaps which are removably attached to the sheath in turn along the axial direction of the sheath.

6. A positioning sheath as recited in claim 3, wherein the positioning portion comprises a sleeve and a land protruding from the sleeve in a circumferential direction of the sleeve, the land having the abutment surface.

7. The positioning sheath of claim 6, wherein the fixation stage is provided with a first wire hole for threading a suture therethrough to fix a position at which the positioning portion is attached to the target object.

8. The positioning sheath of claim 1 further comprising a sheath hub connected to a proximal end of the sheath, the sheath hub having a second wire hole for threading a suture therethrough to secure the sheath with the target object.

9. The positioning sheath of claim 1 further comprising a guidewire and a liner tube guiding threading the guidewire, the liner tube being adapted to movably thread through the sheath tube.

10. The positioning sheath of claim 9 wherein at least a portion of the inner liner tube has an outer diameter that matches an inner diameter of the sheath tube.

11. The positioning sheath of claim 10, wherein the proximal and distal ends of the body of the liner tube are in close fit with the guide wire, and the remainder of the liner tube is in clearance fit with the guide wire; the sheath tube and the lining tube are respectively provided with a liquid inlet and a liquid outlet which penetrate through the side wall, the liquid inlet of the sheath tube is communicated with the liquid inlet of the lining tube to form a liquid inlet channel, the liquid outlet of the sheath tube is communicated with the liquid outlet of the lining tube to form a liquid outlet channel, the liquid inlet channel is closer to the far end of the sheath tube than the positioning structure, the liquid outlet channel is closer to the near end of the sheath tube than the positioning structure, the liquid inlet channel, the lining tube is communicated with a gap between the guide wires in sequence so as to supply blood to flow from the far end to the near end of the lining tube, and the position of the sheath tube entering the target object is marked.

12. The positioning sheath of claim 11 further comprising a sidebranch in communication with the outlet of the sheath, the sidebranch for circumscribing a conduit for delivering fluid into the target object.

13. The positioning sheath of claim 9, wherein the distal end of the inner liner is in close fit with the sheath, the sheath having a fluid inlet extending through a sidewall, there being at least one gap between the inner liner and the sheath, the fluid inlet communicating with the gap for supplying blood from the distal end to the proximal end of the sheath, the proximal end of the sheath having at least one indicator window for identifying the location of the sheath into the target object.

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