CN217365950U

CN217365950U - Drag hook

Info

Publication number: CN217365950U
Application number: CN202220223951.5U
Authority: CN
Inventors: 贺继刚; 周靓; 严丹; 黄尹霞; 刘星佑; 陈鑫昊
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-09-06
Anticipated expiration: 2032-01-26

Abstract

The utility model relates to the field of medical equipment, concretely relates to drag hook. A retractor, comprising: an outer tube; the inner pipe is arranged in the outer pipe, and the far end of the inner pipe is provided with a hook; the locating piece is arranged at the near ends of the outer tube and the inner tube, the fixed end of the locating piece is fixedly connected with the outer tube, the locating piece is suitable for opening or locking the relative positions of the outer tube and the inner tube, the locating piece is provided with a butt joint face, and the butt joint face is suitable for being butted on the tissue outside a human body when an operation is carried out so as to prevent the outer tube and the inner tube from sliding in the body. The utility model solves the defect that the retractor is not convenient enough when the blood vessel is opened in the minimally invasive surgery, thereby providing the retractor which can open the blood vessel more conveniently in the minimally invasive surgery.

Description

Drag hook

Technical Field

The utility model relates to the field of medical equipment, concretely relates to drag hook.

Background

Bentall (aortic valve prosthesis ascending aorta replacement), namely, when the valve prosthesis is used for replacing the root of the ascending aorta and the aortic valve or performing pure aortic replacement surgery. In the traditional Bental operation or the simple aortic valve replacement operation, the ascending aorta replacement or the aortic valve replacement operation is needed to be performed by an open chest operation, so that the hospitalization period of a patient is long and the wound is large. With the gradual implementation of the minimally invasive surgery, the patient does not need to open the chest during the surgery, and the surgery can be carried out only through the rib gaps.

In the existing minimally invasive surgery, when a blood vessel needs to be cut open, a small draw hook is normally used for blocking the aortic wall open, so that the aortic valve annulus is exposed, and the aortic valve annulus tissue is convenient to treat. However, the minimally invasive surgery has a narrow incision and a small surgical field, and can only be operated synchronously by the operator, which results in that the operator cannot simultaneously perform the blood vessel retraction and the valve replacement. Therefore, the traditional drag hook is inconvenient to operate when the minimally invasive vascular surgery is carried out.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the present invention is to overcome the defect that the retractor in the prior art is not convenient enough when the blood vessel is opened in the minimally invasive surgery, thereby providing a retractor which can open the blood vessel more conveniently in the minimally invasive surgery.

In order to solve the above problem, the utility model provides a drag hook, include:

an outer tube;

the inner pipe is arranged in the outer pipe, and the far end of the inner pipe is provided with a hook;

the locating piece is arranged at the near ends of the outer tube and the inner tube, the fixed end of the locating piece is fixedly connected with the outer tube, the locating piece is suitable for opening or locking the relative positions of the outer tube and the inner tube, the locating piece is provided with a butt joint surface, and the butt joint surface is suitable for being butted on tissues outside a human body during an operation so as to prevent the outer tube and the inner tube from sliding in the body.

Optionally, the distal end of the outer tube is provided with an opening, and when the inner tube is pushed to enable the hook to extend out of the opening, the hook has a first state of expanding after extending; when the inner tube is pulled back to enable the hook to be recovered into the opening, the hook has a second state of being compressed after being recovered.

Optionally, the distal end of the outer tube is tapered.

Optionally, the hook is made of nitinol.

Optionally, a first mark and a second mark are sequentially arranged on the inner pipe at the outlet end of the positioning piece, and when the first mark is located at the outlet end, the hook has a first state; when the second identification is located at the outlet end, the hook has a second state.

Optionally, the fixed end of the positioning member is provided with a rotation scale.

Optionally, the positioning member is a locking knob slider.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a drag hook, include: an outer tube; the inner pipe is arranged in the outer pipe, and the far end of the inner pipe is provided with a hook; the positioning piece is arranged at the near ends of the outer pipe and the inner pipe, the fixed end of the positioning piece is fixedly connected with the outer pipe, and the positioning piece is suitable for unlocking or locking the relative positions of the outer pipe and the inner pipe; the positioning piece is provided with an abutting surface which is suitable for abutting against the external tissue of the human body during operation so as to prevent the outer tube and the inner tube from sliding into the human body. The inner and outer tubes are fixed and separated to effect relative movement between the inner and outer tubes. The positioning piece is provided with an abutting surface and is suitable for abutting against the external tissue of the human body during operation, and the fixed end of the positioning piece is fixedly connected with the outer tube so as to prevent the outer tube from sliding freely in the human body; the relative positions of the outer tube and the inner tube are locked by the positioning piece to prevent the inner tube from sliding freely in the body. The artery mural membrane can be hooked by the draw hook in operation, and the butt surface of the positioning piece is matched with human tissue to fix and position the hook, so that the operation can be performed with concentration, the replacement of blood vessels and valves can be realized in operation, and the device has the advantage of convenience in operation.

2. The utility model provides a drag hook, the distal end of the outer tube is provided with an opening, when the inner tube is pushed to lead the hook to extend out of the opening, the hook has a first state of stretching after extending; when the inner pipe is pulled back to enable the hook to be recovered into the opening, the hook has a second state of being compressed after being recovered. The hooks are in two different states of opening and compressing, which is beneficial to hanging the artery wall membrane after the hook at the far end of the inner tube is opened and loosening the artery wall membrane after the hook is contracted.

3. The utility model provides a drag hook, the distal end of outer tube is the toper, and conical design is convenient for the outer tube to pierce through among the chest wall.

4. The utility model provides a drag hook, the material of couple is nickel titanium memory alloy for the drag hook has hyperelasticity, stand wear and tear performance.

5. The utility model provides a drag hook, wherein a first mark and a second mark are sequentially arranged at the outlet end of a positioning piece on an inner tube, and when the first mark is positioned at the outlet end, the hook has a first state; when the second identification is located at the outlet end, the hook has a second state. The design of first sign and second sign, the operator of being convenient for realizes stretching out and retrieving of inner tube according to first sign and second sign pulling inner tube, strengthens the convenience of operation.

6. The utility model provides a drag hook, setting element are locking knob slider to realize the locking to the inner tube through the rotation, the stiff end of setting element is equipped with the rotation scale, so that rotate the inner tube according to rotating the scale, realize the rotation of inner tube for the outer tube, with the turned angle of adjustment couple in the operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of a retractor according to an embodiment of the present invention;

fig. 2 is a schematic structural view of the inner tube and the hook provided in the embodiment of the present invention in an extended state.

Description of the reference numerals: 1. hooking; 2. an outer tube; 3. a fixed end; 4. a locking end; 5. an inner tube; 6. a positioning member; 7. a second identifier; 8. a first identification.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

One embodiment of the retractor shown in fig. 1-2 comprises: an outer tube 2, an inner tube 5 disposed within the outer tube 2, and a spacer 6 disposed at the proximal ends of the outer tube 2 and the inner tube 5. Specifically, proximal refers to the end closer to the operator, and distal refers to the end further from the operator.

To facilitate entry of the outer tube 2 through the chest wall, the distal end of the outer tube 2 is tapered, as shown in figure 1, wherein the inner diameter of the outer tube 2 is 5 mm.

As shown in fig. 1, in order to realize the relative movement between the inner tube 5 and the outer tube 2, the proximal ends of the outer tube 2 and the inner tube 5 are provided with a positioning member 6, the positioning member 6 is fixedly connected with the outer tube 2 through a fixed end 3, and a locking end 4 of the positioning member 6 is provided with a through hole suitable for the inner tube 5 to pass through. The positioning piece 6 is provided with an abutting surface which is suitable for abutting against the tissue outside the human body in the operation, and the fixed end 3 of the positioning piece 6 is fixedly connected with the outer tube 2 so as to prevent the outer tube 2 from sliding freely in the body; the relative positions of the outer tube 2 and the inner tube 5 are locked by the positioning piece 6 to prevent the inner tube 5 from sliding freely in the body. Specifically, the positioning member 6 is a locking knob slider. In order to observe the rotating angle of the inner tube 5, the fixed end 3 of the positioning piece 6 can be provided with rotating scales.

As shown in fig. 1 and 2, the distal end of the inner tube 5 is provided with a hook 1. Specifically, the hook 1 is made of a nickel-titanium alloy memory material. In order to facilitate the operator to observe the extended state of the hanger 1, the proximal end of the inner tube 5 is provided with a first mark 8 and a second mark 7, wherein the outer diameter of the inner tube 5 is 4 mm.

In the specific implementation process, when the hook 1 needs to be opened, an operator pushes the hook 1 out towards the far-end direction, when the first mark 8 is located at the outlet end of the positioning piece 6, the hook 1 is in an opening state, the abutting surface abuts against human tissues, and meanwhile, the locking end 4 is rotated to realize relative fixation between the inner tube 5 and the outer tube 2. When the hook 1 needs to be retracted, an operator pulls the hook 1 back towards the proximal direction, the locking end 4 is rotated to realize the relative movement between the inner pipe 5 and the outer pipe 2, and when the second mark 7 is positioned at the outlet end of the positioning part 6, the hook 1 is retracted into the outer pipe 2. When the hook 1 needs to be rotated, an operator rotates the inner pipe 5 according to the rotation scale of the fixed end 3 to drive the hook 1 to rotate by the inner pipe 5, and after the hook is rotated to a preset position, the inner pipe 5 is locked by the rotation locking end 4 to keep the hook 1 fixed.

The utility model provides a drag hook, the operator of can being convenient for can turned angle, stretch out and the action of pullback when the operation, have easy operation, convenient advantage.

Alternatively, the number of identifications may be 3, 4 or even more.

Alternatively, the outer diameter of the inner tube 5 and the inner diameter of the outer tube 2 may also be other gauge dimensions.

As an alternative embodiment, the inner tube 5 and the positioning member 6 may be connected by a screw, that is, the positioning member 6 is provided with an internal thread, and the inner tube 5 is provided with an external thread adapted to the internal thread. When the hook is to be inserted into a rib, a part of the hook 1 is extended out of the opening of the outer tube 2 by rotating the inner tube 5 in the positioning piece 6, and then the operator rotates the inner tube 5 according to the actual situation in the operation to realize the extension and rotation of the hook 1.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims

1. A retractor, comprising:

an outer tube (2);

the inner pipe (5) is arranged in the outer pipe (2), and the far end of the inner pipe (5) is provided with a hook (1);

the locating piece (6) is arranged at the near end of the outer tube (2) and the inner tube (5), the fixed end (3) of the locating piece (6) is fixedly connected with the outer tube (2), the locating piece (6) is suitable for opening or locking the relative positions of the outer tube (2) and the inner tube (5), the locating piece (6) is provided with a butt joint surface, and the butt joint surface is suitable for being butted on the tissue outside the human body when an operation is carried out so as to prevent the outer tube (2) and the inner tube (5) from sliding in the body.

2. The retractor according to claim 1, characterized in that the distal end of the outer tube (2) is provided with an opening, and when the inner tube (5) is pushed to make the hook (1) extend out of the opening, the hook (1) has a first state of expanding after extending; when the inner pipe (5) is pulled back to enable the hook (1) to be recovered into the opening, the hook (1) has a second state of being compressed after being recovered.

3. The retractor according to claim 1, characterized in that the distal end of the outer tube (2) is tapered.

4. The retractor according to claim 1, characterized in that the material of the hook (1) is nitinol.

5. The retractor according to claim 1, characterized in that a first mark (8) and a second mark (7) are sequentially arranged on the inner tube (5) at the outlet end of the positioning piece (6), and when the first mark (8) is positioned at the outlet end, the hook (1) has a first state; when the second identifier (7) is located at the outlet end, the hook (1) has a second state.

6. The retractor according to claim 1, characterized in that the fixed end (3) of the positioning element (6) is provided with a rotation scale.

7. The retractor according to claim 1, characterized in that the positioning element (6) is a locking knob slide.