Instrument for puncture and drainage of severe chocolate cyst

Abstract

The utility model discloses a severe chocolate cyst puncture liquid extraction instrument which comprises an outer puncture needle tube, an inner guide tube arranged in the outer puncture needle tube and an inner guide rod located in the inner guide tube, the two ends of the inner guide rod extend out of the two ends of the inner guide tube respectively, and the front end of the inner guide rod protrudes to form an adjusting block. A plurality of elastic straight strips are evenly arranged between the adjusting block and the front end of the inner guide pipe at intervals in the direction of the center line of the inner guide rod, the two ends of each elastic straight strip are fixedly connected to the adjusting block and the front end of the inner guide pipe respectively, and the adjusting block can extrude the elastic straight strips so that the elastic straight strips can arch outwards to form an arch shape. A positioning and fixing device is arranged at the position, located outside the rear end of the inner guide pipe, of the inner guide rod, and when the adjusting block extrudes the elastic straight strip, the positioning and fixing device can fix the inner guide rod to the inner guide pipe. The cyst breaking device is simple in structure, sticky liquid in a cyst can be broken up, hardened parts can be broken up, and the whole liquid can be discharged conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an instrument for puncturing and extracting fluid from severe chocolate cysts. Background Art

[0002] Ovarian chocolate cyst, also known as ovarian endometriosis cyst, is a type of endometriosis. Under normal circumstances, the endometrium grows in the uterine cavity and is affected by female hormones in the body. It sheds once a month to form menstruation. If the endometrial fragments shed during menstruation flow back through the fallopian tubes into the pelvic cavity with menstrual blood, and implant on the surface of the ovaries or other parts of the pelvic cavity, ectopic cysts will be formed. This ectopic endometrium is also affected by sex hormones and sheds and bleeds repeatedly with the menstrual cycle. If the lesion occurs on the ovaries, there will be local bleeding during each menstrual period, which will enlarge the ovaries and form cysts containing old blood. This old blood is brown and sticky like a paste, like chocolate, so it is also called "chocolate cyst".

[0003] There are usually three treatment methods for chocolate cysts: (1) Drug therapy: Drug therapy is a conservative treatment method and can only be used for patients with cysts less than 5 cm in diameter; (2) Puncture and fluid extraction: Under ultrasound guidance, a puncture needle is used to puncture the cyst, the fluid in the cyst is aspirated, and then a hardener (such as lauromacrogol) is injected into the cyst to cause the cyst wall cells to degenerate, dehydrate, and necrotize, thereby shrinking the cyst; (3) Laparoscopic surgery: Use separation forceps to completely peel off the skin of the chocolate cyst, and then use a collection bag to remove the peeled cyst from the body through the laparoscope port. Among them, the puncture and fluid extraction treatment method has the advantages of simple operation, less trauma, fewer complications, time saving, low cost, repeatability and reliable efficacy. However, for some patients with severe chocolate cysts, due to the high viscosity of the fluid in the cyst, there may still be some hardening. Therefore, during the puncture and fluid extraction treatment, some fluid or hardening may not be directly drained out with conventional puncture needles. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a puncture and fluid extraction instrument that can break up and fragment the thick liquid in the cyst to facilitate the fluid extraction operation.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A device for puncturing and extracting fluid from a severe chocolate cyst comprises an outer puncture needle tube, an inner catheter arranged in the outer puncture needle tube, and an inner guide rod arranged in the inner catheter and coaxially with the inner catheter. The inner guide rod can slide and cooperate with the inner catheter along the direction of its center line. The two ends of the inner guide rod extend out of the two ends of the inner catheter respectively. An adjustment block is formed on the front end protrusion of the inner guide rod. The projection of the adjustment block along the center line direction of the inner guide rod is located within the projection of the inner catheter along the center line direction of the inner catheter. A plurality of guide rods are evenly spaced between the adjustment block and the front end of the inner catheter and around the center line direction of the inner guide rod. An elastic straight bar, the two ends of the elastic straight bar are respectively fixedly connected to the adjustment block and the front end of the inner guide tube; when the elastic straight bar is in a straight state, the projection of the elastic straight bar along the center line of the inner guide rod is located within the projection of the inner guide tube along the center line of the inner guide tube; when the adjustment block moves toward the direction of the inner guide tube, the adjustment block can squeeze the elastic straight bar so that the elastic straight bar can arch outward to form an arch shape; a positioning and fixing device is provided at a position of the inner guide rod outside the rear end of the inner guide tube; when the adjustment block squeezes the elastic straight bar, the positioning and fixing device can fix the inner guide rod on the inner guide tube.

[0007] In the utility model, when in use, the outer puncture needle tube is used to pierce the cyst; then the front end of the inner catheter extends out of the outer puncture needle tube and also enters the cyst, at this time the inner guide rod is pulled outward, and the adjustment block will move toward the front end of the inner catheter under the action of the inner guide rod, squeezing the elastic straight strips, causing the elastic straight strips to elastically deform, and then arch outward to form an arch shape, so that multiple elastic straight strips can form a cage-like structure; after fixing the inner guide rod by the positioning and fixing device, the inner catheter is rotated, so that the formed cage-like structure rotates in the cyst, similar to the working principle of an egg beater, the viscous liquid part in the cyst is broken up by the rotating cage-like structure, and the hardened part can also be broken up and the remaining liquid is mixed, thereby achieving a dilution effect; finally, the elastic straight strips are restored, the inner catheter is pulled out, and the liquid is extracted by the outer puncture needle tube.

[0008] As an optimization, the positioning and fixing device includes a plug handle, the front end of the plug handle is concavely provided with a plug hole along the center line direction thereof, the rear ends of the inner tube and the inner guide rod are respectively inserted into the plug hole along the center line direction of the plug hole, the rear end of the inner guide rod is fixedly connected to the bottom of the plug hole, the plug handle can slide and cooperate with the inner tube along the center line direction of the inner tube, the plug handle is provided with a locking screw, the locking screw is threadedly connected to the plug handle along the radial direction of the plug handle, and the locking screw can be pressed against the inner tube to fix the plug handle and the inner tube together. It is convenient to operate the pulling of the guide rod, and at the same time, the fixing and separation between the plug handle and the guide tube can be achieved by screwing the locking screw.

[0009] As an optimization, a drive motor is arranged behind the plug handle, and a drive shaft of the drive motor is transmission-connected with the plug handle. The drive motor can be a servo motor, which can regulate the rotation speed of the cage-like structure.

[0010] As an optimization, a fixing hole is recessed at the bottom of the plug hole along the center line direction thereof, and the rear end of the inner guide rod is inserted into the fixing hole along the center line direction of the fixing hole and is interference-connected with the fixing hole. The interference connection can facilitate the fixing and disassembly of the inner guide rod and the plug handle.

[0011] As an optimization, the elastic straight strip is a sheet-like straight strip. When the sheet-like straight strip is in a straight state, the extension direction of the sheet-like straight strip is parallel to the center line direction of the inner guide rod, and the plane where the sheet-like straight strip is located is tangent to the circumferential direction of the inner guide rod. When in use, the plug handle is first pulled backward to make the sheet-like straight strip arch first, and then the plug handle is twisted to rotate the guide rod, that is, to rotate the adjustment block, because one end of the sheet-like straight strip is fixed on the guide tube, when the adjustment block rotates, the sheet-like straight strip is twisted, that is, the long edge of the sheet-like straight strip is turned outward toward the outside. After the plug handle is fixed, the guide tube is rotated. During the rotation of the cage-like structure, the sheet-like straight strip can not only stir the liquid in the cyst, but also, when it is close to the inner wall of the cyst, the everted edge of the sheet-like straight strip can also "scrape" the inner wall of the cyst, and can scrape off the material adhering to the inner wall of the cyst, so that the cyst is drained more thoroughly and the treatment effect is better.

[0012] As an optimization, a linear slide groove extending in a direction parallel to the center line of the inner conduit is recessed on the tube body of the inner conduit at a position corresponding to the locking screw, and a twisting slide groove is formed around the circumferential direction of the inner conduit at one end of the linear slide groove facing the rear end of the inner conduit, and the locking screw can be inserted into the linear slide groove or the twisting slide groove and slide with it along the extension direction of the linear slide groove or the twisting slide groove, and when the locking screw is located at the end where the linear slide groove and the twisting slide groove meet, the elastic straight strip is in an arched shape. After the locking screw is inserted into the linear slide groove or the twisting slide groove, the displacement of the locking screw is limited by the slide groove, so as to realize the deformation control of the sheet-like straight strip.

[0013] As an optimization, the locking screw includes a threaded section threadedly connected to the plug handle, and a screwing portion is formed on one end of the threaded section located outside the plug handle, so that the operator can operate the locking screw on the screwing portion with his hand.

[0014] Compared with the prior art, the utility model has a simple structure and can realize the change of two forms of the elastic straight strip through different control methods. It can disperse the viscous liquid part in the cyst and break up the hardened part, so as to facilitate the discharge of the entire liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the elastic straight strip in the present utility model in an arched shape;

[0016] Figure 2 It is a cross-sectional view of the installation structure of the plug handle in the utility model. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0018] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when used, which is only for the convenience of describing the 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 utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] like Figure 1 and Figure 2As shown, the severe chocolate cyst puncture and fluid extraction device in this specific embodiment includes an outer puncture needle tube, an inner catheter 1 arranged in the outer puncture needle tube, and an inner guide rod 2 located in the inner catheter 1 and arranged on the same center line as the inner catheter 1. The inner guide rod 2 can slide and cooperate with the inner catheter 1 along the center line direction thereof. The two ends of the inner guide rod 2 extend out of the two ends of the inner catheter 1 respectively. An adjustment block 3 is formed on the front end protrusion of the inner guide rod 2. The projection of the adjustment block 3 along the center line direction of the inner guide rod 2 is located within the projection of the inner catheter 1 along the center line direction of the inner catheter 1. The adjustment block 3 is evenly spaced between the front end of the inner catheter 1 and around the center line direction of the inner guide rod 2. There are multiple elastic straight strips 4, and the two ends of the elastic straight strips 4 are fixedly connected to the adjustment block 3 and the front end of the inner guide tube 1 respectively. When the elastic straight strips 4 are in a straight state, the projection of the elastic straight strips 4 along the center line direction of the inner guide rod 2 is located within the projection of the inner guide tube 1 along the center line direction of the inner guide tube 1. When the adjustment block 3 moves toward the direction of the inner guide tube 1, the adjustment block 3 can squeeze the elastic straight strips 4 so that the elastic straight strips 4 can arch outward to form an arch shape. The inner guide rod 2 is located outside the rear end of the inner guide tube 1. A positioning and fixing device is provided. When the adjustment block 3 squeezes the elastic straight strips 4, the positioning and fixing device can fix the inner guide rod 2 on the inner guide tube 1.

[0020] In this specific embodiment, the positioning and fixing device includes a handle 5, the front end of the handle 5 is recessed with a socket along the center line direction thereof, the rear ends of the inner guide tube 1 and the inner guide rod 2 are respectively inserted into the socket along the center line direction of the socket, the rear end of the inner guide rod 2 is fixedly connected to the bottom of the socket, the handle 5 can be slidably matched with the inner guide tube 1 along the center line direction of the inner guide tube 1, a locking screw is provided on the handle of the handle 5, the locking screw is threadedly connected to the handle 5 along the radial direction of the handle 5, and the locking screw can be tightened on the inner guide tube 1 so that the handle 5 and the inner guide tube 1 are fixedly connected together.

[0021] In this specific implementation, a driving motor is disposed behind the plug handle 5 , and a driving shaft of the driving motor is drivingly connected to the plug handle 5 .

[0022] In this specific embodiment, a fixing hole is recessed at the bottom of the insertion hole along the center line direction thereof, and the rear end of the inner guide rod 2 is inserted into the fixing hole along the center line direction of the fixing hole and is interference-connected with the fixing hole.

[0023] In this specific embodiment, the elastic straight strip 4 is a sheet-like straight strip. When the sheet-like straight strip is in a straight state, the extension direction of the sheet-like straight strip is parallel to the center line direction of the inner guide rod 2, and the plane where the sheet-like straight strip is located is tangent to the circumferential direction of the inner guide rod 2.

[0024] In this specific embodiment, a linear slide groove extending in a direction parallel to the center line of the inner catheter 1 is recessed on the tube body of the inner catheter 1 at a position corresponding to the locking screw, and a twisting slide groove is extended around the circumferential direction of the inner catheter 1 at one end of the linear slide groove toward the rear end of the inner catheter 1. The locking screw can be respectively inserted into the linear slide groove or the twisting slide groove and slidably cooperate with the linear slide groove or the twisting slide groove along the extension direction of the linear slide groove or the twisting slide groove. When the locking screw is located at the end where the linear slide groove and the twisting slide groove are connected, the elastic straight strip 4 is in an arch shape.

[0025] In this specific implementation, the locking screw includes a threaded section 6 threadedly connected to the plug handle 5 , and one end of the threaded section 6 located outside the plug handle 5 is protruded to form a screwing portion 7 .

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described by referring to the preferred embodiments of the utility model, those skilled in the art should understand that various changes can be made in form and details without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. An instrument for puncturing and extracting fluid from severe chocolate cysts, comprising an external puncture needle tube, characterized in that: The invention also includes an inner catheter arranged in the outer puncture needle tube and an inner guide rod arranged in the inner catheter and coaxially with the inner catheter, the inner guide rod can be slidably matched with the inner catheter along the center line direction thereof, the two ends of the inner guide rod respectively extend out of the two ends of the inner catheter, the front end protrusion of the inner guide rod is formed with an adjustment block, the projection of the adjustment block along the center line direction of the inner guide rod is located within the projection of the inner catheter along the center line direction of the inner catheter, a plurality of elastic straight strips are evenly arranged between the adjustment block and the front end of the inner catheter and around the center line direction of the inner guide rod, the two ends of the elastic straight strip are respectively fixedly connected to the adjustment block and the front end of the inner catheter, when the elastic straight strip is in a straight state, the projection of the elastic straight strip along the center line direction of the inner guide rod is located within the projection of the inner catheter along the center line direction of the inner catheter, when the adjustment block moves toward the direction where the inner catheter is located, the adjustment block can squeeze the elastic straight strip so that the elastic straight strip can arch outward to form an arch shape, and a positioning and fixing device is provided at a position of the inner guide rod outside the rear end of the inner catheter, and when the adjustment block squeezes the elastic straight strip, the positioning and fixing device can fix the inner guide rod on the inner catheter.

2. The device for puncturing and extracting fluid from severe chocolate cysts according to claim 1, characterized in that: The positioning and fixing device includes a handle, the front end of the handle is recessed with a socket along the center line direction thereof, the rear ends of the inner guide tube and the inner guide rod are respectively inserted into the socket along the center line direction of the socket, the rear end of the inner guide rod is fixedly connected to the bottom of the socket, the handle can be slidably matched with the inner guide tube along the center line direction of the inner guide tube, a locking screw is provided on the handle body of the handle, the locking screw is threadedly connected to the handle along the radial direction of the handle, and the locking screw can be tightened on the inner guide tube to fix the handle and the inner guide tube together.

3. The device for puncturing and extracting fluid from severe chocolate cysts according to claim 2, characterized in that: A driving motor is arranged at the rear of the plug handle, and a driving shaft of the driving motor is transmission-connected with the plug handle.

4. The device for puncturing and extracting fluid from severe chocolate cysts according to claim 2, characterized in that: The bottom of the insertion hole is concavely provided with a fixing hole along the center line direction thereof, and the rear end of the inner guide rod is inserted into the fixing hole along the center line direction of the fixing hole and is interference connected with the fixing hole.

5. The device for puncturing and extracting fluid from severe chocolate cysts according to claim 2, characterized in that: The elastic straight strip is a sheet-like straight strip. When the sheet-like straight strip is in a straight state, the extension direction of the sheet-like straight strip is parallel to the center line direction of the inner guide rod, and the plane where the sheet-like straight strip is located is tangent to the circumferential direction of the inner guide rod.

6. The instrument for puncturing and extracting fluid from severe chocolate cysts according to claim 5, characterized in that: A linear slide groove is recessed on the body of the inner guide tube at a position corresponding to the locking screw and extending in a direction parallel to the center line of the inner guide tube; an end of the linear slide groove facing the rear end of the inner guide tube extends around the circumferential direction of the inner guide tube to form a twisting slide groove; the locking screw can be respectively inserted into the linear slide groove or the twisting slide groove and slidably cooperate with the linear slide groove or the twisting slide groove along the extension direction of the linear slide groove or the twisting slide groove; when the locking screw is located at the end where the linear slide groove and the twisting slide groove meet, the elastic straight bar is in an arch shape.

7. The instrument for puncturing and extracting fluid from severe chocolate cysts according to claim 2, characterized in that: The locking screw comprises a threaded section which is threadedly connected to the plug handle, and a protrusion at one end of the threaded section located outside the plug handle forms a screwing portion.

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