Telescopic puncture outfit

Abstract

The utility model relates to the technical field of medical instruments, in particular to a telescopic puncture outfit which comprises a main body tube, a puncture tube, a rotating tube, a telescopic tube and a fixing mechanism, the puncture tube can extend out of or retract into the main body tube in the axis direction of the main body tube, and the rotating tube drives the puncture tube to move axially through self rotation. The puncture tube is sleeved with the telescopic tube, the telescopic tube and the puncture tube can stretch out and draw back synchronously, and the fixing mechanism is fixed to the bottom end of the puncture tube and used for fixing the puncture outfit and a puncture part when the telescopic tube is in a smooth state. According to the utility model, the puncture tube is extended or retracted by utilizing the relative rotation of the rotating tube and the puncture tube, so that the puncture outfit has two working states to respectively puncture an abdominal wall and a stomach wall, and the puncture outfit in the first working state and the puncture outfit in the second working state are respectively fixed through the telescopic tube and the fixing mechanism; the condition that both the abdominal cavity and the stomach need to be operated is met, and the stability of the puncture outfit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a retractable puncture device. Background Art

[0002] A trocar is a medical device used in minimally invasive surgery. It generally includes a puncture tube and a puncture cone inserted into the puncture tube. First, an opening is made in the epidermis at the puncture site, and then the puncture cone and the front end of the puncture tube pierce the abdominal wall through the opening and enter the abdominal cavity. The puncture cone is then removed, leaving the puncture tube to provide a channel for the instrument.

[0003] However, in the prior art, the puncture device is generally used to puncture the abdominal cavity, so the length of the puncture tube is fixed, and it cannot puncture the stomach wall for gastric surgery. Therefore, the puncture device cannot meet the situation where both the abdominal cavity and the stomach need to be operated on. Utility Model Content

[0004] The technical problem to be solved by the present invention is: in order to solve the problem that the puncture device in the prior art is generally used to puncture the abdominal cavity, so the length of the puncture tube is fixed, and it cannot puncture the stomach wall for gastric surgery. Therefore, the puncture device cannot meet the situation where surgery is required in both the abdominal cavity and the stomach. A retractable puncture device is now provided.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: a retractable puncture device, comprising:

[0006] Main tube;

[0007] a puncture tube, which can extend or retract into the interior of the main tube along the axis of the main tube;

[0008] The rotating tube is sleeved on the outside of the main tube and passes through the main tube to engage with the puncture tube, and drives the puncture tube to move axially by its own rotation;

[0009] The telescopic tube is sleeved on the outside of the puncture tube and can be retracted and retracted synchronously with the puncture tube. When in the retracted state, the outer wall of the telescopic tube is serrated, and when in the extended state, the outer wall of the telescopic tube is smooth.

[0010] and a fixing mechanism, which is fixed to the bottom end of the puncture tube and is used to fix the puncture device and the puncture site when the telescopic tube is in a smooth shape.

[0011] Furthermore, the outer peripheral wall of the puncture tube is protruded to form a bump, and the inner peripheral wall of the rotating tube is provided with a spiral groove extending in the axial direction and for the bump to be inserted into.

[0012] Furthermore, a sliding groove for axial movement of the protrusion is provided on the main body tube, and locking portions are formed at both ends of the sliding groove extending along the circumference of the main body tube.

[0013] Furthermore, the fixing mechanism includes two balloons arranged at intervals, and the puncture wall is located between the two balloons.

[0014] Furthermore, the fixing mechanism also includes two valve body units, which correspond one-to-one to the two balloons and each valve body unit is used to connect to the corresponding balloon. The valve body unit includes a valve body, a connecting tube connecting the valve body and the balloon, and an indicator portion arranged between the valve body and the connecting tube.

[0015] Furthermore, each balloon is provided with flanges extending from both ends along its axial direction for fixing to the outer peripheral wall of the puncture tube, and the flanges are tied with a tie rope.

[0016] Furthermore, the outer peripheral wall of the lower end of the puncture tube protrudes radially to form a step surface, the telescopic tube is located between the bottom end of the main tube and the step surface, and the upper end of the telescopic tube is fixed to the main tube, and the lower end is fixed to the step surface.

[0017] Furthermore, a rotating handle is protruded from the outer peripheral wall of the rotating tube.

[0018] Furthermore, an accommodating groove for accommodating the connecting tube is axially provided on the outer peripheral wall of the puncture tube.

[0019] Furthermore, the balloon may be an air balloon or a water balloon.

[0020] The beneficial effects of the present invention are as follows: the present invention utilizes the relative rotation of the rotating tube and the puncture tube to realize the extension or retraction of the puncture tube, so that the puncture device has two working states to puncture the abdominal wall and the stomach wall respectively, and the puncture device in the first working state and the second working state is fixed respectively by the telescopic tube and the fixing mechanism, which not only meets the situation where both the abdominal cavity and the stomach need to be operated on, but also improves the stability of the puncture device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 3 is a schematic structural diagram of the puncture device in the first working state (puncture tube retracted);

[0023] Figure 2 yes Figure 1 Cross-sectional view in the AA direction;

[0024] Figure 3 yes Figure 2 A partial enlarged view of part C in the middle;

[0025] Figure 4 Schematic diagram of the coordination between the main tube and the puncture tube when the trocar is in the first working state;

[0026] Figure 5Schematic diagram of the structure of the puncture device in the second working state (puncture tube extended);

[0027] Figure 6 yes Figure 5 Cross-sectional view in the middle BB direction;

[0028] Figure 7 yes Figure 6 A partial enlarged view of part D in the middle;

[0029] Figure 8 Schematic diagram of the coordination between the main tube and the puncture tube when the trocar is in the second working state;

[0030] Figure 9 It is a structural diagram of the rotating tube;

[0031] Figure 10 It is a structural diagram of the main tube;

[0032] Figure 11 It is a structural diagram of the puncture tube;

[0033] In the picture:

[0034] 1. Main tube; 101. Slide groove; 102. Locking part;

[0035] 2. Puncture tube; 201. Bump; 202. Step surface; 203. Accommodation groove;

[0036] 3. Rotating tube; 301; spiral groove; 302; rotating handle;

[0037] 4. Telescopic tube;

[0038] 5. Fixing mechanism; 501. Balloon; 5011. Flanged edge; 502. Valve body; 503. Connecting tube; 504. Indicating portion; 505. Tie rope. DETAILED DESCRIPTION

[0039] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that illustrate the basic structure of the present invention only in a schematic manner. Therefore, they only show components relevant to the present invention, and directions and references (e.g., up, down, left, right, etc.) may be used solely to facilitate the description of features in the drawings. The following detailed description is therefore not to be taken in a limiting sense, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0040] like Figure 1 and Figure 5 As shown, a retractable trocar comprises:

[0041] Main tube 1;

[0042] The puncture tube 2 can extend or retract along the axis of the main tube 1. The "retraction" here is relative to the "extension". When the puncture tube 2 is in the retracted state, it is not completely retracted into the main tube 1. It still partially extends out of the puncture tube 2 to complete the puncture work. The puncture cone is inserted into the puncture tube 2. When the puncture cone is removed, a working channel for the instrument to pass through is formed inside the puncture tube 2.

[0043] The rotating tube 3 is sleeved on the outside of the main tube 1 and passes through the main tube 1 to engage with the puncture tube 2, and drives the puncture tube 2 to move axially by its own rotation. The rotating tube 3, the main tube 1 and the puncture tube 2 are arranged in sequence from the outside to the inside, as shown in FIG. Figure 3 and Figure 7 As shown;

[0044] The telescopic tube 4 is sleeved on the outside of the puncture tube 2 and can be retracted and retracted synchronously with the puncture tube 2. When in the contracted state, the outer peripheral wall of the telescopic tube 4 is serrated. This is the first working state of the puncture device, which is used to puncture the abdominal wall. The serrated telescopic tube 4 contacts the abdominal wall to increase the friction between the two. On the one hand, it can fix the puncture device and improve its stability. On the other hand, it can improve the sealing between the puncture device and the abdominal wall to avoid air leakage when inflating the abdominal cavity in the later stage. When in the extended state, the outer peripheral wall of the telescopic tube 4 is smooth. This is the second working state of the puncture device, which is used to puncture the stomach. The telescopic tube 4 in the smooth state can smoothly pass through the abdominal wall to allow the puncture tube 2 to reach the stomach.

[0045] And a fixing mechanism 5, which is fixed to the bottom end of the puncture tube 2 and is used to fix the puncture device to the puncture site when the telescopic tube 4 is in a smooth shape; when the telescopic tube 4 is in a smooth shape and extended state, the puncture device is used to puncture the stomach. At this time, the telescopic tube 4 cannot play a fixing role, and the puncture device needs to be fixed by the fixing mechanism 5 at the bottom end of the puncture tube 2.

[0046] When the puncture device is in the first working state, the puncture tube 2 and the telescopic tube 4 are both in the retracted state and are used to puncture the abdominal wall. The serrated telescopic tube 4 can improve the fixing effect of the puncture tube 2. When it is necessary to puncture the stomach, the rotating tube 3 is rotated to drive the puncture tube 2 to gradually extend out of the main tube 1 to a predetermined length to puncture the stomach. At the same time, the telescopic tube 4 gradually extends and becomes smoother during the gradual extension process so that it can smoothly pass through the abdominal wall. After the puncture is completed, it can be fixed on the stomach wall by the fixing mechanism 5.

[0047] In some examples, such as Figure 11 As shown, the outer wall of the puncture tube 2 is protruded to form a protrusion 201. Figure 9As shown, the inner wall of the rotating tube 3 is provided with a spiral groove 301 extending axially and for the protrusion 201 to be engaged. The protrusion 201 is preferably a cylindrical structure to avoid the two from getting stuck when sliding in the spiral groove 301. The number of protrusions 201 can be one, two or three, etc., which is not limited in this embodiment; when the rotating tube 3 is rotated, the protrusion 201 is driven to move along the spiral groove 301, thereby driving the puncture tube 2 to move axially.

[0048] In some examples, such as Figure 10 As shown, the main body tube 1 is provided with a slide groove 101 for axial movement of the protrusion 201. The number of the slide grooves 101 corresponds to the number of the protrusions 201. Both ends of each slide groove 101 extend circumferentially along the main body tube 1 to form a locking portion 102. The upper end is the upper locking portion, and the lower end is the lower locking portion. When the protrusion 201 is located inside the upper locking portion, the puncture tube 2 is in a retracted state. When the protrusion 201 is located in the lower locking portion, the puncture tube 2 is in an extended state.

[0049] In some examples, such as Figure 1 and Figure 5 As shown, the fixing mechanism 5 includes two balloons 501 arranged at intervals, and the puncture wall is located between the two balloons. Although the two balloons 501 will still protrude from the puncture tube 2 when in a deflated state, they will not affect the puncture work of the puncture tube 2. When the two balloons are in a filled state, the stomach wall can be clamped in the middle to fix the puncture device.

[0050] In some examples, the fixing mechanism 5 also includes two valve body units, which correspond one-to-one to the two balloons 501 and each valve body unit is used to connect to the corresponding balloon 501. The valve body unit includes a valve body 502, a connecting tube 503 connecting the valve body 502 and the balloon 501, and an indicator part 504 arranged between the valve body 502 and the connecting tube 503; when the deflated balloon 501 located below enters the inner side of the stomach wall, the valve body 502 in the corresponding valve body unit is opened, and the medium is filled into the balloon 501 through the connecting tube 503 to make it bulge. When the indicator part 504 also bulges, it indicates that the balloon 501 has been normally activated, and then the medium is filled into the balloon 501 located on the outside of the stomach wall through another valve body unit to make it bulge and normally activated.

[0051] In some examples, each balloon 501 is extended along both ends of its axial direction to form a flange 5011 for fixing to the outer wall of the puncture tube 2, and a rope 505 is tied to the flange 5011. The flange 5011 is first bonded to the puncture tube 2 by glue. Considering that the internal pressure increases sharply after the balloon 501 is filled with the medium, in order to improve the fixing effect of the balloon 501, the balloon 501 can be tied to the puncture tube 2 by the rope 505. The flanges 5011 set on the side where the two balloons 501 are close to each other are overlapped to meet the stomach wall thickness requirement.

[0052] In some examples, such as Figure 11 As shown, the outer peripheral wall of the lower end of the puncture tube 2 protrudes radially to form a step surface 202, and the telescopic tube 4 is located between the bottom end of the main tube 1 and the step surface 202, and the upper end of the telescopic tube 4 is fixed to the main tube 1, and the lower end is fixed to the step surface 202. When the puncture tube 2 is retracted into the main tube 1, the telescopic tube 4 can be driven to contract synchronously, and when the puncture tube 2 is extended from the main tube 1, the telescopic tube 4 can be driven to extend synchronously.

[0053] In some examples, such as Figure 9 As shown, a rotating handle 302 is protruded from the outer peripheral wall of the rotating tube 3 , and the number can be one or two. The rotating handle 302 can facilitate the operation of the rotating tube 3 .

[0054] In some examples, such as Figure 11 As shown, the outer wall of the puncture tube 2 is axially provided with a receiving groove 203 for accommodating the connecting tube 503. The number and length of the receiving groove 203 correspond to the connecting tube 503. The length of the connecting tube 503 corresponding to the balloon 501 located at the lower part is greater than the length of the connecting tube 503 corresponding to the balloon 501 located at the upper part.

[0055] In some examples, the balloon 501 may be an air bag or a water bag, and the interior of the balloon may be inflated with air or water through a valve unit. The balloon 501 is made of PVC.

[0056] Working principle:

[0057] like Figures 1-4 As shown, when the puncture device is in the first working state, the puncture tube 2 and the telescopic tube 4 are both retracted and used to puncture the abdominal wall. At this time, the protrusion 201 is located inside the upper locking portion, and the serrated telescopic tube 4 can improve the fixing effect of the puncture tube 2; Figure 5-Figure 8 As shown, when it is necessary to puncture the stomach, the rotating tube 3 is rotated to drive the protrusion 201 to move along the spiral groove 301 into the lower locking part, and the puncture tube 2 gradually extends out of the main tube 1 to a predetermined length to puncture the stomach wall. At the same time, the telescopic tube 4 gradually extends and becomes smoother during the gradual extension process so that it can smoothly pass through the abdominal wall. When the deflated balloon 501 located below enters the inner side of the stomach wall, the valve body 502 in the corresponding valve body unit is opened, and the balloon 501 is inflated with air or water through the connecting tube 503 to make it bulge. When the indicator part 504 also bulges, it indicates that the balloon 501 has been normally activated. Then, the medium is inflated into the balloon 501 located on the outside of the stomach wall through another valve body unit to make it bulge. The two bulged balloons 501 clamp the stomach wall in the middle to fix the puncture device.

[0058] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A retractable trocar, characterized in that: include: Main body tube (1); a puncture tube (2) which can extend along the axis of the main body tube (1) or retract into the interior of the main body tube (1); A rotating tube (3) is sleeved on the outside of the main tube (1) and passes through the main tube (1) to be clamped with the puncture tube (2), and drives the puncture tube (2) to move axially by rotating itself; A telescopic tube (4) is sleeved on the outside of the puncture tube (2) and can be retracted and retracted synchronously with the puncture tube (2); the outer peripheral wall of the telescopic tube (4) is serrated in a retracted state, and is smooth in an extended state; and a fixing mechanism (5), which is fixed to the bottom end of the puncture tube (2) and is used to fix the puncture device and the puncture site when the telescopic tube (4) is in a smooth shape.

2. The retractable trocar according to claim 1, characterized in that: The outer peripheral wall of the puncture tube (2) is protruded to form a convex block (201), and the inner peripheral wall of the rotating tube (3) is provided with a spiral groove (301) extending in the axial direction and for the convex block (201) to be inserted.

3. The retractable trocar according to claim 2, characterized in that: The main body tube (1) is provided with a sliding groove (101) for the convex block (201) to move axially, and locking portions (102) are formed at both ends of the sliding groove (101) extending along the circumference of the main body tube (1).

4. The retractable trocar according to claim 1, characterized in that: The fixing mechanism (5) comprises two spaced apart balloons (501), with the puncture wall located between the two balloons.

5. The retractable trocar according to claim 4, characterized in that: The fixing mechanism (5) further includes two valve body units, the two valve body units corresponding to the two balloons (501) one by one, and each valve body unit is used to connect to the corresponding balloon (501), and the valve body unit includes a valve body (502), a connecting tube (503) connecting the valve body (502) and the balloon (501), and an indicator (504) arranged between the valve body (502) and the connecting tube (503).

6. The retractable trocar according to claim 4, characterized in that: Each balloon (501) is provided with flanges (5011) extending from both ends along its axial direction for fixing to the outer peripheral wall of the puncture tube (2), and a binding rope (505) is tied to the flanges (5011).

7. The retractable trocar according to claim 1, characterized in that: The outer peripheral wall of the lower end of the puncture tube (2) protrudes radially to form a stepped surface (202), and the telescopic tube (4) is located between the bottom end of the main tube (1) and the stepped surface (202), and the upper end of the telescopic tube (4) is fixed to the main tube (1), and the lower end is fixed to the stepped surface (202).

8. The retractable trocar according to claim 1, characterized in that: A rotating handle (302) is formed on the outer peripheral wall of the rotating tube (3).

9. The retractable trocar according to claim 5, characterized in that: An accommodating groove (203) for accommodating a connecting tube (503) is provided in the axial direction on the outer peripheral wall of the puncture tube (2).

10. The retractable trocar according to claim 4, characterized in that: The balloon (501) can be an air balloon or a water balloon.

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