Guiding device for minimally invasive implantation of drainage tube

Abstract

The utility model discloses a guiding device for minimally invasive implantation of a drainage tube, and belongs to the technical field of medical instruments. Comprising a pressing arm, a supporting arm, a drainage tube and a puncture needle. A limiting pin shaft is movably arranged on the pressing arm in a penetrating mode, and the tail end of the limiting pin shaft is connected to the supporting arm. The puncture needle is detachably connected to the tail end of the pressing arm; an elliptical through hole is formed in the tail end of the supporting arm; a plurality of limiting through holes are formed in the end of the drainage tube in the circumferential direction of the drainage tube, two first side protruding blocks capable of being matched with the limiting through holes in an inserted mode are arranged on the inner wall of the oval through hole, two second side protruding blocks capable of being matched with the limiting through holes in an inserted mode are arranged on the periphery of a puncture part on the puncture needle, and the tail end of the puncture part is in a pointed cone shape. The end of the drainage tube can be connected to the periphery of the puncture part in a sleeving mode, and slope faces back to the moving direction of the pressing arm are arranged on the first side protruding block and the second side protruding block. The minimally invasive implantation guiding device for the drainage tube can solve the problems that an existing drainage tube is inconvenient in puncture implantation operation and high in tissue damage risk.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a minimally invasive drainage tube insertion guide device. Background Technology

[0002] In surgical procedures, wound bleeding and tissue fluid exudation are unavoidable problems. If blood and fluid accumulate in body cavities or interstitial spaces, they can easily lead to serious complications such as postoperative infection, delayed wound healing, and even limb necrosis. Negative pressure drainage tubes are the core tool for draining wound bleeding and exudate from the body. They are connected to an external negative pressure source through the tube body to form a pressure gradient for active drainage.

[0003] There are two main types of surgical negative pressure drainage tube placement methods: one is a simple side-hole drainage tube, which uses a silicone or PVC soft tube body. It requires the use of a scalpel blade and hemostats to create a channel before insertion, which has the problems of difficult puncture, the need for additional instruments, and large tissue cutting damage; the other is a drainage tube with a puncture guide needle. A rigid puncture guide needle is added to the end of the drainage tube to assist puncture. The guide needle is cut off after puncture. However, the puncture guide needle of this method needs to be punctured from the interstitial space to the outside of the skin, which is inconvenient and laborious to operate.

[0004] Therefore, there is an urgent need for a puncture guidance device that can assist in the insertion of drainage tubes, making the operation less strenuous and minimizing tissue damage. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a minimally invasive drainage tube insertion guide device that can solve the problems of inconvenient puncture and insertion of existing drainage tubes and high risk of tissue damage. It can achieve blunt separation puncture of the drainage tube, making the operation convenient and labor-saving, while reducing damage to surrounding tissues, blood vessels and nerves during puncture and needle withdrawal.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: it includes a pressure arm, a support arm, a drainage tube, and a puncture needle; at least two mutually parallel limiting pins are movably inserted on the pressure arm, and the ends of the limiting pins are connected to the support arm;

[0007] The puncture needle is detachably connected to the tail end of the pressure arm, and the central axis of the puncture needle is perpendicular to the direction of movement of the pressure arm; the tail end of the support arm is provided with an elliptical through hole that can be inserted and engaged with the puncture needle and used to pass through the drainage tube.

[0008] The end of the drainage tube is provided with several limiting through holes along its circumference. The inner wall of the elliptical through hole is symmetrically provided with two side protrusions that can be inserted and engaged with the limiting through holes along its long axis. The outer periphery of the puncture part on the puncture needle is symmetrically provided with two side protrusions that can be inserted and engaged with the limiting through holes along the short axis of the elliptical through hole. The end of the puncture part is conical, and the end of the drainage tube can be sleeved on the outer periphery of the puncture part. The side protrusions one and two are provided with a sloping surface facing away from the direction of movement of the pressure arm.

[0009] Optionally, the inner walls of both ends of the limiting through hole extending along the movement direction of the pressure arm are semi-circular arc-shaped, and the ends of the side protrusions one and two that can abut against the inner wall of the limiting through hole are also semi-circular arc-shaped.

[0010] Optionally, the puncture needle further includes a rod portion connected to the puncture portion, wherein the rod portion and the puncture portion are smoothly transitioned through a transition cone surface, and the outer diameter of the rod portion is larger than the outer diameter of the puncture portion and the drainage tube.

[0011] Optionally, the tail end of the pressure arm is provided with an open locking hole for inserting the puncture needle, and a fastening bolt for tightening the open locking hole to fit tightly against the outer periphery of the puncture needle is threaded through and connected to the tail end of the pressure arm.

[0012] Optionally, the outer periphery of the limiting pin is fitted with support springs at both ends, which are elastically supported on the pressure arm and the support arm, respectively.

[0013] Optionally, a silicone pad is provided between two adjacent limiting pins, connected to the pressure arm and used for hand gripping, and the support arm is provided with a gripping groove corresponding to the silicone pad.

[0014] Optionally, a limiting pad is provided on the side of the support arm facing the pressure arm.

[0015] Optionally, the support arm includes a hand-held section arranged parallel to the pressure arm and an insertion section with the elliptical through hole, the insertion section being arc-shaped.

[0016] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: the pressure arm and the support arm can move in parallel through the limiting pin, which makes the gripping operation stable; and through the targeted design of the elliptical through hole, the puncture part and the side protrusions with the inclined surface, the automatic and smooth docking of the puncture needle and the drainage tube and the smooth disengagement of the drainage tube from the support arm can be achieved. The entire process only requires holding the pressure arm and the support arm to complete the puncture and pull-out action, without the need for additional instrument assistance. The operation steps are simple and greatly save the physical strength and time of medical staff. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of the minimally invasive insertion guide device for the drainage tube in a preferred embodiment of this utility model;

[0019] Figure 2 This is a preferred embodiment of the present invention. Figure 1 A magnified structural diagram at point B;

[0020] Figure 3 This is a front view structural schematic diagram of the drainage tube minimally invasive placement guide device in a preferred embodiment of this utility model;

[0021] Figure 4 This is a cross-sectional view of the support arm at the central axis of the elliptical through hole in a preferred embodiment of the present invention.

[0022] Figure 5 This is a cross-sectional view of the puncture needle in a preferred embodiment of the present invention;

[0023] Among them, 1. Pressure arm; 11. Open locking hole; 2. Support arm; 201. Hand-held section; 202. Insertion section; 21. Elliptical through hole; 22. Side protrusion one; 23. Grip groove; 3. Drainage tube; 31. Limiting through hole; 4. Puncture needle; 41. Puncture part; 42. Side protrusion two; 43. Rod body; 44. Transition cone surface; 5. Limiting pin; 6. Sloping surface; 7. Fastening bolt; 8. Support spring; 9. Silicone pad; 10. Limiting pad post. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0025] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] like Figures 1-5As shown, a minimally invasive drainage tube insertion guide device includes a pressure arm 1, a support arm 2, a drainage tube 3, and a puncture needle 4. At least two parallel limiting pins 5 are movably inserted through the pressure arm 1, with the ends of the limiting pins 5 connected to the support arm 2. Specifically, the ends of the limiting pins 5 can be fixedly connected to the support arm 2 by means of threaded connection, welding, or snap-fit, while the head of the limiting pin 5 opposite to its end is provided with a post that can abut against the pressure arm 1, allowing the pressure arm 1 and the support arm 2 to move relatively parallel while preventing the pressure arm 1 from detaching from the limiting pins 5. Further, in this embodiment, the puncture needle 4 is detachably connected to the tail end of the pressure arm 1, and the central axis of the puncture needle 4 is perpendicular to the direction of movement of the pressure arm 1. The tail end of the support arm 2 has an elliptical through hole 21 that can be inserted and engaged with the puncture needle 4 for inserting the drainage tube 3. It should be noted that the end of the drainage tube 3 has several limiting through holes 31 along its circumference. The inner wall of the elliptical through hole 21 has two symmetrically arranged side protrusions 22 that can engage with the limiting through holes 31. When medical personnel insert the drainage tube 3 into the elliptical through hole 21 by slight compression and deformation, and twist the drainage tube 3 so that some of the limiting through holes 31 can engage with the two side protrusions 22, the end of the drainage tube 3 can be stably confined within the elliptical through hole 21 without significant external force. Simultaneously, the puncture part 41 of the puncture needle 4 has two symmetrically arranged side protrusions 42 that can engage with the limiting through holes 31 along the minor axis of the elliptical through hole 21, and the end of the puncture part 41 is conical. Furthermore, the end of the drainage tube 3 can be sleeved around the puncture part 41, and the side protrusion 1 22 and the side protrusion 2 42 are provided with a ramp surface 6 facing away from the direction of movement of the pressure arm 1. Therefore, during the vertical movement of the puncture needle 4 toward the elliptical through-hole 21, the pointed end of the puncture part 41 will first engage with the drainage tube 3 that is locked in the elliptical through-hole 21. When the drainage tube 3 is sleeved around the circumference of the puncture part 41, the puncture part 41 on the puncture needle 4 will apply downward pressure to the drainage tube 3, driving the drainage tube 3 to detach downward from the elliptical through-hole 21. However, since the lumen of the drainage tube 3 is restricted by the compression around the circumference of the puncture part 41, the side protrusion 22 on the inner wall of the elliptical through-hole 21 can still maintain engagement with the limiting through-hole 31 on the drainage tube 3, thereby preventing the drainage tube 3 from detaching downward from the elliptical through-hole 21, thus ensuring that the puncture part 41 can stably engage with the drainage tube 3 locked in the elliptical through-hole 21 in subsequent processes. It should be noted that when the end of the drainage tube 3 is stably confined within the elliptical through hole 21, the second side protrusion 42 provided on the side wall of the elliptical through hole 21 cannot completely pass through the limiting through hole 31 on the drainage tube 3, so it will not prevent the subsequent drainage tube 3 from being sleeved on the outer periphery of the puncture part 41.Furthermore, as the puncture needle 4 continues to move downwards, the ramp surface 6 on the second side protrusion 42 will guide and slightly open the port of the drainage tube 3 until the two second side protrusions 42 on the puncture part 41 slide into the other limiting through holes 31 on the drainage tube 3. At this point, the docking of the puncture needle 4 and the drainage tube 3 is completed. Then, when the puncture needle 4 is pulled out in the reverse direction, since the port of the drainage tube 3 is already sleeved on the outer periphery of the puncture part 41, and the second side protrusion 42 on the puncture part 41 has also been stably inserted and engaged with the limiting through holes 31 on the drainage tube 3, the drainage tube 3 will move upwards synchronously with the puncture needle 4. During this process, guided and compressed by the slope 6 on the side protrusion 22, the drainage tube 3 deforms as it moves upward synchronously with the puncture needle 4, causing the side protrusion 22 to detach from the corresponding limiting through hole 31 on the drainage tube 3. It should be noted that since the end of the puncture needle 4 is conical, there is no limitation on the deformation space of this section of the drainage tube 3. After the section of the drainage tube 3 with the limiting through hole 31 is completely pulled out of the elliptical through hole 21 under the traction of the puncture needle 4, the space inside the elliptical through hole 21 will be completely released. The drainage tube 3 only needs to undergo slight deformation under the compression of the side protrusion 22 to continuously pass through the elliptical through hole 21, with relatively low resistance. Furthermore, for the edge portions of the side protrusion 22 and the side protrusion 42, in this embodiment, both the side protrusion 22 and the side protrusion 42 are rounded at their edges to avoid scratching the drainage tube 3 and the wound tissue.

[0027] Specifically, in actual use, medical staff can first insert the drainage tube 3 into the elliptical through hole 21 and limit the position of the drainage tube 3 by the two side protrusions 22. Then, the medical staff can place this section in a suitable position in the patient's tissue wound. Then, by holding it with their hands or with the help of relevant equipment (such as the electric gripper end effector of the surgical robot), they can drive the pressure arm 1 and the support arm 2 to move towards each other, driving the puncture needle 4 to puncture the patient's skin and tissue until the puncture part 41 on the puncture needle 4 is connected with the drainage tube 3. Then, by stabilizing the support arm 2 with one hand and pulling the pressure arm 1 with the other hand, the drainage tube 3 is driven to pass through the patient's tissue and protrude outside the body along with the puncture needle 4. After leaving a suitable length, the drainage tube 3 can be cut with medical instruments, thus completing the puncture operation of the drainage tube 3 conveniently and quickly. It is important to note that because the tip of the puncture section 41 is conical, the tapered structure at the conical end of the puncture section 41 concentrates the force at a single point during the insertion of the puncture needle 4 into the skin and tissue. This allows for rapid penetration of the barriers of dense tissues such as the epidermis and fascia with minimal contact area. Medical personnel can complete the puncture simply by holding the pressure arm 1 and the support arm 2, solving the problems of laborious and cumbersome procedures associated with existing drainage tube 3 puncture operations. Furthermore, compared to the traditional method of establishing a channel with a scalpel and hemostats before inserting the drainage tube 3, this method only makes a relatively small sharp incision at the puncture entrance, creating a straight and regular channel for the subsequent blunt passage of the puncture needle 4, the second side protrusion 42, and the drainage tube 3, effectively avoiding significant tissue cutting damage.

[0028] The above, such as Figure 2 , Figure 4 As shown, the inner walls of both ends of the limiting through hole 31 extending along the direction of movement of the pressure arm 1 are semi-circular arcs, and the ends of the side protrusions 22 and 42 that can abut against the inner wall of the limiting through hole 31 are also semi-circular arcs, in order to increase the contact area between the side protrusions 22 and 42 and the inner wall of the limiting through hole 31, reduce stress concentration, and prevent the drainage tube 3 from tearing due to excessive traction force.

[0029] The above, such as Figure 5 As shown, the puncture needle 4 also includes a rod portion 43 connected to the puncture portion 41. The rod portion 43 and the puncture portion 41 are smoothly connected by a transition cone surface 44. The outer diameter of the rod portion 43 is larger than the outer diameter of the puncture portion 41 and the drainage tube 3, which can open a straight and regular channel for the blunt passage of the subsequent puncture needle 4, the second side protrusion 42 and the drainage tube 3.

[0030] The above, such as Figure 1 As shown, the end of the pressure arm 1 is provided with an open locking hole 11 for inserting the puncture needle 4, and a fastening bolt 7 is threaded through and connected to the end of the pressure arm 1 to tighten the open locking hole 11 to fit tightly against the outer periphery of the puncture needle 4, so that the puncture needle 4 can be replaced or its state adjusted as needed by loosening or tightening the fastening bolt 7.

[0031] The above, such as Figure 1 , Figure 3 As shown, the outer periphery of the limiting pin 5 is fitted with support springs 8 at both ends, which are elastically supported on the pressure arm 1 and the support arm 2 respectively, thereby realizing the automatic reset of the pressure arm 1 and simplifying the operation process.

[0032] The above, such as Figure 1 As shown, a silicone pad 9 is provided between two adjacent limit pins 5, which is connected to the pressure arm 1 and used for hand gripping. The support arm 2 is provided with a gripping groove 23 corresponding to the silicone pad 9, so as to improve the operating comfort and stability of medical staff.

[0033] The above, such as Figure 1 , Figure 3 As shown, a limiting pad 10 is provided on the side of the support arm 2 facing the pressure arm 1 to limit the movement stroke of the pressure arm 1, and the puncture depth can be reflected by the distance between the end of the limiting pad 10 and the pressure arm 1.

[0034] In this embodiment, as Figure 3 As shown, the support arm 2 includes a hand-held section 201 arranged parallel to the pressure arm 1 and an insertion section 202 with an elliptical through hole 21. The insertion section 202 is arc-shaped to facilitate the insertion of the drainage tube 3 into the patient's wound.

[0035] Working principle: In actual use, medical staff can first insert the drainage tube 3 into the elliptical through hole 21, and limit the position of the drainage tube 3 by the two side protrusions 22. Then, the medical staff can place this section in a suitable position in the patient's tissue wound. Then, by holding and driving the pressure arm 1 and the support arm 2 to move towards each other, the puncture needle 4 is driven to puncture the patient's skin and tissue until the puncture part 41 on the puncture needle 4 is connected with the drainage tube 3. Then, by stabilizing the support arm 2 with one hand and pulling the pressure arm 1 with the other hand, the drainage tube 3 is driven to pass through the patient's tissue and protrude out of the body along with the puncture needle 4. After leaving a suitable length, the drainage tube 3 can be cut with medical instruments, thus completing the puncture operation of the drainage tube 3 conveniently and quickly.

[0036] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A minimally invasive drainage tube insertion guide device, characterized in that: It includes a pressure arm (1), a support arm (2), a drainage tube (3), and a puncture needle (4); at least two parallel limiting pins (5) are movably inserted through the pressure arm (1), and the ends of the limiting pins (5) are connected to the support arm (2). The puncture needle (4) is detachably connected to the tail end of the pressure arm (1), and the central axis of the puncture needle (4) is perpendicular to the direction of movement of the pressure arm (1); the tail end of the support arm (2) is provided with an elliptical through hole (21) that can be inserted and cooperated with the puncture needle (4) and used to pass through the drainage tube (3). The end of the drainage tube (3) is provided with several limiting through holes (31) along its circumference. The inner wall of the elliptical through hole (21) is symmetrically provided with two side protrusions (22) that can be inserted into the limiting through hole (31) along its long axis. The outer periphery of the puncture part (41) on the puncture needle (4) is symmetrically provided with two side protrusions (42) that can be inserted into the limiting through hole (31) along the short axis of the elliptical through hole (21). The end of the puncture part (41) is cone-shaped, and the end of the drainage tube (3) can be sleeved on the outer periphery of the puncture part (41). The side protrusions (22) and the side protrusions (42) are provided with slopes (6) facing away from the direction of movement of the pressure arm (1).

2. The minimally invasive insertion guide device for drainage tubes according to claim 1, characterized in that: The inner walls of both ends of the limiting through hole (31) extending along the movement direction of the pressure arm (1) are semi-circular arcs, and the ends of the side protrusions one (22) and the side protrusions two (42) that can support and abut against the inner wall of the limiting through hole (31) are also semi-circular arcs.

3. The minimally invasive insertion guide device for drainage tubes according to claim 1, characterized in that: The puncture needle (4) also includes a rod body (43) connected to the puncture part (41). The rod body (43) and the puncture part (41) are smoothly connected by a transition cone surface (44), and the outer diameter of the rod body (43) is larger than the outer diameter of the puncture part (41) and the drainage tube (3).

4. The minimally invasive insertion guide device for drainage tubes according to claim 1, characterized in that: The end of the pressure arm (1) is provided with an open locking hole (11) for inserting the puncture needle (4), and a fastening bolt (7) is threaded through and connected to the end of the pressure arm (1) to tighten the open locking hole (11) to fit tightly against the outer periphery of the puncture needle (4).

5. The minimally invasive insertion guide device for drainage tubes according to claim 1, characterized in that: The limiting pin (5) is fitted with a support spring (8) at both ends, which are elastically supported on the pressure arm (1) and the support arm (2) respectively.

6. The minimally invasive insertion guide device for drainage tubes according to claim 1, characterized in that: A silicone pad (9) is provided between two adjacent limiting pins (5) and connected to the pressure arm (1) for hand gripping. The support arm (2) is provided with a gripping groove (23) corresponding to the silicone pad (9).

7. The minimally invasive insertion guide device for drainage tubes according to claim 1, characterized in that: A limiting pad (10) is provided on the side of the support arm (2) facing the pressure arm (1).

8. The minimally invasive insertion guide device for drainage tubes according to claim 1, characterized in that: The support arm (2) includes a hand-held section (201) arranged parallel to the pressure arm (1) and an insertion section (202) provided with the elliptical through hole (21), the insertion section (202) being arc-shaped.

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