Heart-shaped foreign body forceps device

Abstract

The utility model relates to medical instrument technical field especially relates to a kind of heart-shaped foreign body forceps device, comprising: head, inner core subassembly, outer sheath, forceps ring and forceps handle;Wherein, head is the heart-shaped rope of the heart shape that far end is concave and near end is sharp;The near end of head is fixedly connected with the far end of inner core subassembly, and inner core subassembly is slidably arranged in the lumen of outer sheath;The near end of outer sheath is fixedly arranged in the far end of forceps handle, and the through-hole for the inner core subassembly is provided in the inside of forceps handle;The side of forceps handle is provided with sliding slot, and the sliding hole is provided in the axial direction along itself of forceps ring, and the side wall of sliding hole is fixedly provided with connecting piece.The utility model is designed as the heart-shaped rope of the heart shape that far end is concave and near end is sharp, removes the sharp corner structure of conventional head on the one hand, on the other hand, the flexible form of rope is combined with specific heart shape structure, and near end is sharp can accurately position foreign matter in narrow space, reduce the interference to surrounding tissue.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a heart-shaped foreign body forceps device. Background Technology

[0002] In clinical medicine, endoscopic foreign body removal surgery has become a common method for foreign body removal due to its advantages such as small incision, fewer surgical complications, and less impact on patients. Foreign body forceps are the core instrument of this type of surgery. They need to be inserted into the human body through an endoscope to locate the foreign body and then complete the grabbing and removal operation.

[0003] Currently, the heads of conventional foreign body forceps on the market are mostly oval, hexagonal, and crescent-shaped, and are mostly rigid structures. Doctors need to select the appropriate head based on the shape of the foreign body for surgery. However, these conventional heads share a common drawback: the tips are all sharp angles, and their rigid shape has limited adaptability. When the foreign body is located in a narrow space in the body (such as a narrow section of the digestive tract or a narrow area of ​​the airway), the sharp angles are very likely to interfere with the surrounding tissues, interfering with the accurate retrieval of the foreign body. At the same time, the rigid head cannot flexibly conform to foreign bodies of different shapes, which not only increases the difficulty of the doctor's operation and prolongs the operation time, but may also cause additional stimulation to the patient's internal tissues due to repeated operations, aggravating the patient's pain, and failing to meet the clinical needs for improved operation convenience and patient experience.

[0004] Based on the problems of the sharp corner of the head of the existing foreign body forceps interfering with operation and the poor adaptability of the rigid structure, this utility model provides a brand-new heart-shaped foreign body forceps device. By designing the head as a lanyard structure of a specific shape, the head function and the collaborative design of each component are optimized to solve the problem of foreign body retrieval in narrow spaces, thereby improving surgical efficiency and patient comfort. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by providing a heart-shaped foreign object clamp device, which solves the problems of the sharp corner of the conventional foreign object clamp head interfering with operation in narrow spaces and the poor adaptability of the rigid structure. To achieve the above objectives, the technical solution adopted by this utility model is as follows: a heart-shaped foreign body clamp device, comprising: a retrieval head, an inner core assembly, an outer sheath, a clamp ring, and a clamp handle; wherein, the retrieval head is a heart-shaped lanyard with a concave distal end and a pointed proximal end; the proximal end of the retrieval head is fixedly connected to the distal end of the inner core assembly, and the inner core assembly is slidably disposed in the cavity of the outer sheath; the proximal end of the outer sheath is fixedly disposed at the distal end of the clamp handle, and a through hole for the inner core assembly to pass through is provided inside the clamp handle; a sliding groove is provided on one side of the clamp handle, and a sliding hole is provided along its own axial direction for the clamp ring; a connector is fixedly disposed on the side wall of the sliding hole; the clamp ring is slidably disposed on the outer surface of the clamp handle through the sliding hole; the connector is slidably disposed in the sliding groove; and the proximal end of the inner core assembly is fixedly connected to the connector.

[0006] Furthermore, a force-applying ring is fixedly provided at the proximal end of the pliers handle.

[0007] Furthermore, the connector is elongated, and its width is adapted to the width of the groove of the pliers handle. A fixing hole is provided in the middle of the connector, and the proximal end of the inner core assembly is fixedly disposed in the fixing hole.

[0008] Furthermore, the outer sheath tube cavity, the through hole of the pliers handle, the sliding hole of the pliers ring, and the fixing hole of the connector are coaxially arranged.

[0009] Furthermore, the inner core component is a steel wire rope structure.

[0010] Furthermore, the outer surface of the clamp ring is provided with several anti-slip grooves along its circumference.

[0011] Furthermore, the extraction head is made of one of the following materials: medical stainless steel, titanium alloy, polyetheretherketone (PEEK), or nickel-titanium alloy.

[0012] The present invention adopts the above technical solution and has the following technical effects compared with the prior art: This invention designs the retrieval head as a heart-shaped lanyard with a concave distal end and a pointed proximal end. This eliminates the sharp angles of conventional heads, and the flexible shape of the lanyard combined with the specific heart-shaped structure allows for precise positioning of foreign objects in confined spaces, reducing interference with surrounding tissues. The concave distal end conforms to the surface of the foreign object, enhancing its containment and adapting to the retrieval needs of foreign objects of different shapes, significantly improving the ease of operation and retrieval stability for doctors. The anti-slip texture on the outer surface of the forceps rings increases the friction between the fingers and the forceps rings, preventing slippage during operation. The force-applying ring at the proximal end of the forceps handle allows the fingers to pass through, helping doctors to hold the device stably and further improving operational stability. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 This is a schematic diagram of the shaft side structure of the clamp ring in this utility model; Figure 3 This is a top view of the clamp ring structure of this utility model; The reference numerals in the attached figures are: 1. Retrieval head; 2. Inner core assembly; 3. Outer sheath; 4. Clamping ring; 5. Clamping handle; 51. Sliding groove; 41. Sliding hole; 42. Connector; 6. Force-applying ring. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0017] Example This embodiment provides a heart-shaped foreign body forceps device, including: a retrieval head 1, an inner core assembly 2, an outer sheath tube 3, a forceps ring 4, and a forceps handle 5; The snare head 1 is a heart-shaped snare with a concave distal end and a pointed proximal end; the proximal end of the snare head 1 is fixedly connected to the distal end of the inner core assembly 2, which is slidably disposed in the cavity of the outer sheath tube 3; the proximal end of the outer sheath tube 3 is fixedly disposed at the distal end of the clamp handle 5, and the clamp handle 5 has a through hole for the inner core assembly 2 to pass through; a sliding groove 51 is provided on one side of the clamp handle 5, and a sliding hole 41 is provided along its own axial direction for the clamp ring 4. A connector 42 is fixedly disposed on the side wall of the sliding hole 41, and the clamp ring 4 is slidably disposed on the outer surface of the clamp handle 5 through the sliding hole 41. The connector 42 is slidably disposed in the sliding groove 51, and the proximal end of the inner core assembly 2 is fixedly connected to the connector 42; a force-applying ring 6 is also fixedly disposed at the proximal end of the clamp handle 5.

[0018] The retrieval head 1 is made of one of the following materials: medical-grade stainless steel, titanium alloy, polyetheretherketone (PEEK), or nickel-titanium alloy. It has a heart-shaped lanyard structure with a concave distal end and a pointed proximal end. The lanyard combines flexibility and tensile strength—its flexibility allows it to deform according to the shape of the foreign object, conforming to its surface to enhance retrieval stability; its tensile strength ensures it will not break during retrieval. The proximal end (pointed end) of the retrieval head 1 is fixedly connected to the distal end of the inner core component 2 using laser welding. After welding, the weld points are ground to ensure a smooth, protrusion-free connection, preventing scratches to the endoscopic forceps channel or human tissue, while also ensuring connection strength to prevent separation during retrieval. The core function of the retrieval head 1 is to directly contact and retrieve the foreign object. The concave distal structure creates a containment space to prevent the foreign object from slipping, while the pointed proximal structure allows for precise approach to the foreign object in narrow spaces, solving the operational interference problems of conventional sharp-angled heads.

[0019] Furthermore, the inner core assembly 2 is a steel wire rope structure, with the outer diameter of the steel wire rope matching the inner diameter of the outer sheath tube 3, ensuring smooth sliding along the axial direction of the tube without any jamming. The overall length of the inner core assembly 2 covers the transmission path from the proximal end of the snare head 1 to the connector 42, with its proximal end fixedly installed in the fixing hole of the connector 42. The rigidity of the steel wire rope is sufficient to move the snare head 1. The inner core assembly 2 is the core component for power transmission, converting the sliding motion of the clamp ring 4 into the opening and closing motion of the snare head 1: when the inner core assembly 2 moves towards the distal end, it pushes the snare head 1 to extend from the outer sheath tube 3 and open; when the inner core assembly 2 moves towards the proximal end, it pulls the snare head 1 to retract, achieving the wrapping and fixing of the foreign object. The entire transmission process is responsive.

[0020] Furthermore, the outer sheath 3 is a hollow tubular structure, with a cavity through which the inner core assembly 2 and the retrieval head 1 pass. The proximal end of the outer sheath 3 is fixedly positioned at the distal end of the forceps handle 5 using an interference fit to ensure that there is no relative looseness between the outer sheath 3 and the forceps handle 5, and that the cavity of the outer sheath 3 is connected to the through hole of the forceps handle 5, ensuring that the inner core assembly 2 can be smoothly inserted into the forceps handle 5. The core functions of the outer sheath 3 include: first, protecting the inner core assembly 2 and the retrieval head 1 from direct friction with the endoscopic forceps channel, preventing wear; second, isolating the inner core assembly 2 and the retrieval head 1 from human tissue, reducing the risk of infection; and third, providing guidance to ensure that the device can smoothly reach the location of the foreign object.

[0021] Furthermore, the pliers handle 5 is a handheld operating component. An axial through-hole is formed inside the pliers handle 5 for the inner core assembly 2 to pass through, and the inner diameter of the through-hole matches the outer diameter of the inner core assembly 2. A sliding groove 51 is formed on one side of the pliers handle 5, and the width of the sliding groove 51 matches the width of the connecting member 42, ensuring that the connecting member 42 can slide stably along the sliding groove 51. A force-applying ring 6 is fixedly provided at the proximal end of the pliers handle 5. The inner diameter of the force-applying ring 6 is adapted to the thickness of a thumb, allowing the operator's thumb to pass through. The core function of the pliers handle 5 is to provide stable grip support for the operator. The force-applying ring 6 can fix the hand position and prevent the pliers handle 5 from sliding during operation; the sliding groove 51 provides a sliding guide for the connecting member 42, ensuring a stable power transmission path.

[0022] Furthermore, the clamp ring 4 is a ring-shaped operating component with a sliding hole 41 along its axial direction. The inner diameter of the sliding hole 41 matches the outer surface diameter of the clamp handle 5, allowing the clamp ring 4 to be fitted onto the outer surface of the clamp handle 5 through the sliding hole 41 and slide axially. Several anti-slip grooves are formed on the outer surface of the clamp ring 4 along its circumference. These grooves increase the friction between the operator's fingers and the clamp ring 4, preventing slippage during operation. A connector 42 is fixedly installed on the side wall of the sliding hole 41. The connector 42 and the clamp ring 4 are integrally formed to ensure connection strength. The core function of the clamp ring 4 is to allow the operator to apply force. By sliding the clamp ring 4 forward or backward, the connector 42 moves along the sliding groove 51, thereby driving the inner core assembly 2 to move and opening / closing the clamping head 1.

[0023] Furthermore, the connector 42 is elongated, with a width matching the width of the groove 51 of the clamp handle 5. A fixing hole is provided in the middle, and the proximal end of the inner core assembly 2 is fixedly disposed in the fixing hole. The connector 42 is slidably disposed in the groove 51 and moves synchronously with the sliding of the clamp ring 4. The core function of the connector 42 is to establish the power transmission between the clamp ring 4 and the inner core assembly 2, transmitting the sliding motion of the clamp ring 4 to the inner core assembly 2 to ensure that the two move synchronously.

[0024] Furthermore, the force-applying ring 6 is fixedly mounted on the proximal end of the forceps handle 5 and is made of a medical material compatible with the forceps handle 5. The core function of the force-applying ring 6 is to allow the operator's thumb to pass through, forming a grip fulcrum, helping the operator stabilize the position of the forceps handle 5, preventing the forceps handle 5 from sliding along with the forceps ring 4, improving the accuracy of the operation, and reducing hand fatigue caused by prolonged operation.

[0025] Furthermore, the outer sheath 3's lumen, the through hole of the handle 5, the sliding hole 41 of the clamp ring 4, and the fixing hole of the connector 42 are coaxially arranged to ensure that the inner core assembly 2 slides axially without bending or jamming, guaranteeing the synchronicity and accuracy of the opening and closing action of the retrieval head 1. When the operator pushes the clamp ring 4 forward, the clamp ring 4 slides distally along the handle 5, and the connector 42 drives the inner core assembly 2 distally, pushing the retrieval head 1 out of the outer sheath 3 and opening; when the clamp ring 4 is pulled backward, the clamp ring 4 slides proximally along the handle 5, and the connector 42 drives the inner core assembly 2 proximally, pulling the retrieval head 1 to contract and wrap around the foreign object, completing the retrieval action.

[0026] When in use: The operator inserts his thumb into the force-applying ring 6, and his index and middle fingers fit against the anti-slip texture of the clamp ring 4. He pulls the clamp ring 4 backward to make the retrieval head 1 fully retract and be stored in the lumen of the outer sheath tube 3, so as to avoid the lanyard getting caught on the clamp channel wall when it is inserted into the endoscope clamp channel.

[0027] Align the distal end of the outer sheath 3 containing the retrieval head 1 with the endoscope forceps inlet, slowly push the outer sheath 3, and observe the position of the device through the real-time image of the endoscope until the distal end of the outer sheath 3 approaches the foreign object area.

[0028] Keep your thumb inserted through the force ring 6 to secure the handle 5. Push the force ring 4 forward with your index and middle fingers to extend and open the retrieval head 1 from the outer sheath 3. Adjust the endoscope angle so that the concave space at the distal end of the retrieval head 1 is aligned with the foreign object. After the foreign object is enclosed in the encapsulation space, pull the force ring 4 backward to retract the retrieval head 1 and fix the foreign object.

[0029] Maintain the backward pulling force of the clamp ring 4 to secure the foreign object, and slowly pull the outer sheath tube 3 backward with the other hand to bring the retrieval head 1 and the foreign object out of the endoscope clamp channel, thus completing the removal of the foreign object.

[0030] In summary, this embodiment, through the structural design and coordinated operation of its components, solves the operational defects of conventional foreign body forceps, improves the convenience and stability of foreign body retrieval in confined spaces, and meets the needs of clinical minimally invasive surgery.

[0031] The above description of this utility model is merely a preferred embodiment of this utility model and does not limit the implementation method and protection scope of this utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of this utility model should be included within the protection scope of this utility model.

Claims

1. A heart-shaped foreign object clamp device, characterized in that, include: The detachment head (1), inner core assembly (2), outer sheath (3), clamp ring (4), and clamp handle (5); The snare head (1) is a heart-shaped snare with a concave distal end and a pointed proximal end; The proximal end of the retrieval head (1) is fixedly connected to the distal end of the inner core assembly (2), and the inner core assembly (2) is slidably disposed in the lumen of the outer sheath tube (3); The proximal end of the outer sheath (3) is fixedly disposed at the distal end of the clamp handle (5), and the clamp handle (5) has a through hole for the inner core assembly (2) to pass through. A sliding groove (51) is provided on one side of the clamp handle (5), and a sliding hole (41) is provided along its own axial direction of the clamp ring (4). A connector (42) is fixedly provided on the side wall of the sliding hole (41). The clamp ring (4) is slidably disposed on the outer surface of the clamp handle (5) through the sliding hole (41). The connector (42) is slidably disposed in the sliding groove (51), and the proximal end of the inner core assembly (2) is fixedly connected to the connector (42).

2. The heart-shaped foreign body clamp device according to claim 1, characterized in that, The pliers (5) are also fixedly provided with a force-applying ring (6) at the proximal end.

3. The heart-shaped foreign body clamp device according to claim 1, characterized in that, The connector (42) is long and narrow, and the width of the connector (42) is adapted to the width of the groove (51) of the pliers (5). A fixing hole is provided in the middle of the connector (42), and the proximal end of the inner core assembly (2) is fixedly disposed in the fixing hole.

4. The heart-shaped foreign body clamp device according to claim 3, characterized in that, The lumen of the outer sheath (3), the through hole of the pliers (5), the sliding hole (41) of the pliers (4), and the fixing hole of the connector (42) are coaxially arranged.

5. The heart-shaped foreign body clamp device according to claim 1, characterized in that, The inner core component (2) is a steel wire rope structure.

6. The heart-shaped foreign body clamp device according to claim 1, characterized in that, The outer surface of the clamp ring (4) is provided with several anti-slip textures along its circumference.

7. The heart-shaped foreign body clamp device according to claim 1, characterized in that, The retrieval head (1) is made of one of the following materials: medical stainless steel, titanium alloy, polyetheretherketone (PEEK), and nickel-titanium alloy.

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