Fingerstall type navigation injection device

Abstract

The invention discloses a fingerstall type navigation injection device, and relates to the technical field of medical instruments, the fingerstall type navigation injection device comprises a fingerstall and an injection assembly, and the fingerstall is provided with an operation cavity and a finger insertion cavity; a needle outlet is formed in one end, far away from the finger inserting opening, of the operation cavity; the injection assembly comprises a rigid needle head, a flexible injection tube and a connector which are sequentially connected, the rigid needle head and the flexible injection tube are both inserted into the operation cavity, and part of the structure of the rigid needle head is exposed out of the needle outlet; the connector is used for being connected with an injector so that liquid medicine can be injected into the body of a patient through the connector, the flexible injection tube and the rigid needle. The invention aims to improve the treatment effect of intravaginal injection treatment, reduce the risk of accidental acupuncture injury and exposure of an operator and guarantee the safety of the operator.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a finger-type navigation injection device. Background Technology

[0002] With the increasing incidence of pelvic floor dysfunction, precise intravaginal injection therapy has become an important intervention in the field of pelvic floor rehabilitation. Currently, in clinical practice, for conditions such as pelvic floor muscle spasm and chronic pelvic pain syndrome, multiple injections of drugs such as botulinum toxin, corticosteroids, or platelet-rich plasma into the vaginal wall are commonly used to relieve symptoms and improve function. This type of injection therapy requires strict control over the precision and depth of drug administration, directly affecting treatment efficacy and patient safety.

[0003] In existing techniques, intravaginal injection procedures primarily rely on the operator's manual experience, using a long needle directly connected to a standard syringe. During the procedure, the operator wears sterile gloves, uses their index finger to palpate and locate the injection site in the vagina, and holds the syringe in their other hand to insert the long needle into the target tissue. Based on experience, they judge the insertion depth and then inject the medication. After completing one injection site, the needle is completely withdrawn, and the finger is moved to the next injection site, repeating the process until all multiple injection sites are completed.

[0004] However, during the injection process, the operator cannot simultaneously perceive the depth of the needle insertion and the tactile sensation of the tissue where the needle tip is located, making it difficult to achieve real-time tactile feedback and precise depth control, which may lead to unsatisfactory treatment results. Summary of the Invention

[0005] The main objective of this invention is to provide a finger-type navigation injection device, which aims to improve the therapeutic effect of intravaginal injection therapy.

[0006] To achieve the above objectives, the present invention provides a finger-type navigation injection device, comprising: A finger sleeve, the finger sleeve having an operating cavity and a finger insertion cavity; the finger insertion cavity having an insertion port for the operator's finger to be inserted, and the operating cavity having a needle outlet at the end away from the insertion port; and An injection assembly includes a rigid needle, a flexible injection tube, and a connector connected in sequence. The rigid needle and the flexible injection tube are both inserted into the operating chamber, and a portion of the rigid needle's structure is exposed at the needle outlet. The connector is used to connect a syringe so that the medication is injected into the patient's body through the connector, the flexible injection tube, and the rigid needle.

[0007] In one embodiment, the finger sleeve has a tactile portion located at one end of the finger sleeve away from the finger insertion port and on the side of the finger sleeve opposite to the operating cavity.

[0008] In one embodiment, the material of the tactile part is medical-grade silicone.

[0009] In one embodiment, the thickness of the tactile part is defined as t, where 0.3 mm ≤ t ≤ 0.5 mm.

[0010] In one embodiment, the tactile portion is elliptical in shape.

[0011] In one embodiment, the length of the finger sleeve is defined as L1, and the total length of the rigid needle, the flexible injection tube, and the connector assembly is defined as L2; ​​L2 = 2L1.

[0012] In one embodiment, the end of the flexible injection tube away from the rigid needle has a scale, the length of which is L3; L3 = L1.

[0013] In one embodiment, the rigid needle has an injection bevel at the end away from the connector.

[0014] In one embodiment, the connector is a Luer lock connector.

[0015] In one embodiment, the needle is made of stainless steel.

[0016] In the technical solution of this invention, the finger-type navigation injection device includes a finger sleeve and an injection assembly. The finger sleeve forms an operating cavity and a finger insertion cavity. The finger insertion cavity has an insertion port for the operator's finger to be inserted, and the end of the operating cavity away from the insertion port has a needle outlet. The injection assembly includes a rigid needle, a flexible injection tube, and a connector connected in sequence. Both the rigid needle and the flexible injection tube are inserted into the operating cavity, and part of the structure of the rigid needle is exposed at the needle outlet. The connector is used to connect a syringe so that the medication is injected into the patient's body through the connector, the flexible injection tube, and the rigid needle. In the technical solution of this invention, by integrating the finger sleeve and the injection assembly into one unit, the operator's finger palpation positioning and injection operation are synchronized. During the operation, the operator locates the injection point through the finger tactile sensing window, and slightly bends or moves the index finger to align the needle with the target, thus performing the injection. This achieves real-time tactile feedback and precise depth control, thereby improving the therapeutic effect of intravaginal injection treatment. Meanwhile, the flexible injection tube can slide within the operating chamber. In non-injection mode, the injection component can slide to completely conceal the rigid needle within the operating chamber. The finger cot covering the surgeon's fingers can prevent the surgeon from being exposed to the surgical environment, thereby reducing the risk of accidental needlestick injury and exposure, and ensuring the surgeon's safety. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the finger-type navigation injection device provided by the present invention; Figure 2 This is a schematic diagram of the structure of a finger sleeve in an embodiment of a finger sleeve-type navigation injection device; Figure 3 This is a schematic diagram of another embodiment of the finger sleeve in a finger sleeve-type navigation injection device; Figure 4 This is a schematic diagram of the injection component in a finger-type navigation injection device.

[0019] Explanation of icon numbers:

[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the 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.

[0023] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0024] With the increasing incidence of pelvic floor dysfunction, precise intravaginal injection therapy has become an important intervention in the field of pelvic floor rehabilitation. Currently, in clinical practice, for conditions such as pelvic floor muscle spasm and chronic pelvic pain syndrome, multiple injections of drugs such as botulinum toxin, corticosteroids, or platelet-rich plasma into the vaginal wall are commonly used to relieve symptoms and improve function. This type of injection therapy requires strict control over the precision and depth of drug administration, directly affecting treatment efficacy and patient safety.

[0025] In existing techniques, intravaginal injection procedures primarily rely on the operator's manual experience, using a long needle directly connected to a standard syringe. During the procedure, the operator wears sterile gloves, uses their index finger to palpate and locate the injection site in the vagina, and holds the syringe in their other hand to insert the long needle into the target tissue. Based on experience, they judge the insertion depth and then inject the medication. After completing one injection site, the needle is completely withdrawn, and the finger is moved to the next injection site, repeating the process until all multiple injection sites are completed.

[0026] However, during the injection process, the operator cannot simultaneously perceive the depth of the needle insertion and the tactile sensation of the tissue where the needle tip is located, making it difficult to achieve real-time tactile feedback and precise depth control, which may lead to unsatisfactory treatment results.

[0027] To address the above problems, this invention proposes a finger-type navigation injection device 100. Figure 1 , Figure 2 , Figure 3 as well as Figure 4 This is a schematic diagram of an embodiment of the finger-type navigation injection device 100 provided by the present invention.

[0028] Please refer to Figure 1 , Figure 2 , Figure 3 as well as Figure 4This invention proposes a finger-type navigation injection device 100, comprising a finger sleeve 1 and an injection assembly. The finger sleeve 1 forms an operating cavity 1b and a finger insertion cavity 1a. The finger insertion cavity 1a has an insertion port 1a1 for the operator to insert their finger. The operating cavity 1b has a needle outlet 1b1 at one end away from the insertion port 1a1. The injection assembly includes a rigid needle 21, a flexible injection tube 22, and a connector 23 connected in sequence. The rigid needle 21 and the flexible injection tube 22 are both inserted into the operating cavity 1b, and part of the structure of the rigid needle 21 is exposed at the needle outlet 1b1. The connector 23 is used to connect a syringe so that the liquid medicine is injected into the patient's body through the connector 23, the flexible injection tube 22, and the rigid needle 21.

[0029] In practical applications, the finger cot 1 can be understood as a wearable assistive tool, whose main function is to provide finger positioning and operational support for the operator. Specifically, the finger cot 1 can be made of medical-grade polymer materials, such as polyurethane or thermoplastic elastomers, primarily to ensure stable insertion of the finger within the insertion cavity 1a and reduce slippage interference during operation. Furthermore, the design of the insertion cavity 1a facilitates quick and stable finger insertion by the operator, while avoiding interference with injection operations due to the cavity being too loose or too tight. The operation cavity 1b is designed to constrain the injection assembly through an internal channel, ensuring that the direction of the rigid needle 21 is strictly aligned with the finger's direction, thereby enhancing depth control. The injection assembly includes a rigid needle 21, a flexible injection tube 22, and a connector 23 connected in sequence. The rigid needle 21 provides a stable puncture tip to ensure injection accuracy, the flexible injection tube 22 adapts to bending deformation within the operation cavity 1b to maintain operational flexibility, and the connector 23 achieves a reliable connection with the syringe, collectively ensuring a stable drug delivery path without affecting finger manipulation. Both the rigid needle 21 and the flexible injection tube 22 are inserted into the operating chamber 1b. The injection components are constrained within the finger sleeve 1 to prevent movement, ensuring that the needle direction is strictly aligned with the finger's pointing direction, thus enhancing the control over the injection depth. The design of partially exposing the rigid needle 21 at the needle outlet 1b1 allows the needle to extend partially for injection. Simultaneously, the operator can sense changes in the contact resistance between the needle and tissue through the finger sleeve 1, providing basic tactile feedback to aid in assessing tissue condition. The connector 23 connects to the syringe, facilitating convenient drug injection and allowing the operator to focus on finger positioning and depth adjustment, improving the overall coordination and safety of the operation.

[0030] The innovation of this application lies in integrating the finger sleeve 1 with the injection component, enabling simultaneous finger palpation positioning and injection operation. During the procedure, the surgeon locates the injection point through the tactile sensory window on their finger, and can perform injection by slightly bending or moving their index finger to align the needle with the target, achieving real-time tactile feedback and precise depth control, thereby improving the therapeutic effect of intravaginal injection treatment. Simultaneously, the flexible injection tube 22 can slide within the operating cavity 1b. In non-injection states, the injection component can slide to completely conceal the rigid needle 21 within the operating cavity 1b, reducing the risk of accidental needlestick injury and ensuring the surgeon's safety. The finger sleeve 1 covering the surgeon's finger prevents the surgeon from being exposed to the surgical environment, thus reducing the surgeon's exposure risk.

[0031] The working principle of this embodiment is as follows: The finger sleeve-type navigation injection device 100, through the integrated design of the finger sleeve 1 and the injection component, realizes the synchronous operation of the surgeon's finger palpation positioning and injection. The finger sleeve 1 forms a finger insertion cavity 1a and an operating cavity 1b, allowing the surgeon's finger to be stably inserted into the finger insertion cavity 1a as the operating basis, thereby directly converting the finger bending movement into needle movement, avoiding the positioning deviation problem caused by separate operations in the prior art. The finger insertion cavity 1a has a finger insertion port 1a1, which facilitates the surgeon's quick and stable finger insertion, reduces operational interference, and ensures that the palpation positioning process is continuous and unaffected by the injection component. The operating cavity 1b has a needle outlet 1b1 at the end away from the finger insertion port 1a1, allowing the rigid needle 21 to accurately extend from the needle outlet 1b1, ensuring that the injection point precisely corresponds to the finger positioning position and preventing needle deviation from affecting treatment accuracy.

[0032] Please refer to Figure 2 and Figure 3 In one embodiment of the present invention, the finger sleeve 1 has a tactile part 11, which is located at the end of the finger sleeve 1 away from the finger insertion port 1a1 and on the side of the finger sleeve 1 opposite to the operating cavity 1b.

[0033] Specifically, the tactile part 11 refers to a dedicated area on the finger sleeve 1 designed to sense tissue tactile sensation. It can be made of a highly sensitive and biocompatible material, allowing the operator to directly perceive the target tissue's tactile feel. The tactile part 11 is located at the end of the finger sleeve 1 furthest from the insertion port 1a1. This location facilitates direct contact with the target tissue during injection, providing real-time tactile input. Simultaneously, the tactile part 11 is located on the side of the finger sleeve 1 facing away from the operating cavity 1b. This layout ensures that the tactile part 11 does not interfere with the injection components in the operating cavity 1b, while maximizing the contact area with the tissue, thereby enhancing the accuracy and real-time nature of the feedback.

[0034] By incorporating a tactile sensor 11 on the finger cot 1, the operator can simultaneously perceive the depth of needle insertion and the tactile sensation of the tissue at the needle tip during the procedure. The tactile sensor 11 is positioned at the end of the finger cot 1, facilitating direct contact with the target tissue and avoiding feedback delays caused by improper placement. Furthermore, the tactile sensor 11 is located on the side of the finger cot 1 opposite to the operating cavity 1b, which not only avoids interference with the injection components but also optimizes the tactile feedback transmission. Through this technical solution, the operator can obtain real-time tactile feedback during injection, thereby achieving precise depth control and synchronous tactile perception, effectively solving the problem of lack of real-time tactile feedback during operation.

[0035] In one embodiment of the present invention, the material of the tactile part 11 is medical silicone.

[0036] Specifically, medical-grade silicone is a material with excellent biocompatibility and softness, which can be achieved using high-molecular-weight organosilicon compounds. In practical applications, medical-grade silicone provides a suitable elastic modulus and surface friction coefficient, thereby ensuring that the surgeon receives clear tactile feedback during the procedure. Furthermore, medical-grade silicone also has good chemical resistance and anti-aging properties, maintaining stable physical properties in medical environments.

[0037] By selecting medical-grade silicone as the material for the tactile part 11, the tactile part 11 at the end of the finger cot 1 furthest from the insertion port 1a1 possesses ideal softness and sensitivity. This material selection not only enhances the operator's tactile perception of the vaginal wall tissue but also ensures safety and comfort during contact with human tissue. Especially during multi-point injections, the tactile part 11 made of medical-grade silicone helps the operator more accurately determine the needle position and insertion depth, thereby improving the accuracy of the injection operation. At the same time, this material selection also works well with the overall structure of the finger cot 1, ensuring the functionality of the tactile part 11 while maintaining the integrity and practicality of the finger cot 1.

[0038] Through the above technical solutions, the surgeon can obtain more reliable tactile feedback during intravaginal injection treatment, effectively solving the problem of feedback distortion caused by unsuitable materials, and thus achieving more precise depth control and positioning.

[0039] The thickness of the tactile part 11 is defined as t, where 0.3 mm ≤ t ≤ 0.5 mm. In one embodiment of the present invention, t = 0.4 mm.

[0040] The thickness t is set within a range to strike a balance between sensitivity and durability, aiming to ensure that the operator receives accurate tactile feedback while guaranteeing that the device has a sufficient lifespan.

[0041] The thickness t of the tactile part 11 is limited to between 0.3 mm and 0.5 mm, a range chosen based on thorough consideration of practical usage needs. When the thickness is close to the lower limit of 0.3 mm, the tactile part 11 can provide more sensitive tactile feedback, making it easier for the operator to accurately judge the needle position and insertion depth; while when the thickness is close to the upper limit of 0.5 mm, it can enhance the structural strength of the tactile part 11, avoiding wear or deformation caused by frequent use. By controlling the thickness within this range, it is ensured that the operator can obtain clear tactile feedback while maintaining the overall durability of the device, thus effectively resolving the contradiction between the accuracy of tactile perception and operational comfort. By optimizing the thickness of the tactile part 11, the operator's operational precision during intravaginal injection is significantly improved. Because the tactile part 11 is tightly integrated with the finger sleeve 1, the operator can obtain reliable tactile information while maintaining finger dexterity, thereby achieving more precise injection positioning and depth control.

[0042] Please refer to Figure 3 In one embodiment of the present invention, the tactile part 11 is elliptical in shape.

[0043] In practical applications, the tactile part 11 is designed in an oval shape, which can better fit the natural contour of the surgeon's fingers, thereby providing more uniform and sensitive tactile feedback.

[0044] By designing the tactile part 11 as an ellipse, pressure is dispersed upon contact with tissue, avoiding tactile dullness caused by localized pressure concentration. This shape optimization not only enhances the operator's real-time perception of needle position and depth but also improves operational comfort. Simultaneously, the elliptical design helps the operator maintain stable tactile feedback during multi-point injections within the vagina, ensuring accuracy at each injection site. Furthermore, this design reduces operational errors caused by inaccurate tactile sensation, improving overall treatment effectiveness and patient safety.

[0045] Through the above technical solutions, the surgeon can obtain more precise depth control and positional awareness during the injection process, thereby achieving more accurate drug injection and ensuring treatment effectiveness and patient safety.

[0046] Please refer to Figure 2 and Figure 4 In one embodiment of the present invention, the length of the finger sleeve 1 is defined as L1, and the total length of the rigid needle 21, the flexible injection tube 22 and the connector 23 is defined as L2; ​​L2 = 2L1.

[0047] Specifically, the length L1 of the finger sleeve 1 refers to the total extension distance from the finger insertion port 1a1 to the needle outlet 1b1, which can be calibrated using precise measuring tools to provide a reference point for depth control. The total length L2 of the assembly of the rigid needle 21, flexible injection tube 22, and connector 23 covers the length of the entire injection path, which can be achieved by connecting each component sequentially and measuring the overall dimensions to ensure the comprehensiveness of the length definition. The ratio between L2 and L1 is directly related to the length of the finger sleeve 1 and the length of the needle assembly, and its purpose is to achieve intuitive depth estimation and precise control through a fixed ratio.

[0048] By setting a specific ratio between the total length of the needle assembly and the length of the finger cot 1, the problem of inaccurate injection depth control is solved. In actual operation, when the operator inserts the finger cot 1 into the target position, the length L1 of the finger cot 1 provides a fixed reference, so the length of the extended portion of the rigid needle 21 is also fixed at L1. This design allows the operator to intuitively judge the needle depth based on the position of the finger cot 1, thereby achieving real-time depth feedback and precise control. In addition, the introduction of the flexible injection tube 22 not only ensures the integrity of the injection path, but also adapts to different operating angles through its flexibility, further improving the practicality of the device. On this basis, the design of the connector 23 ensures a stable connection with the syringe, thereby ensuring the reliability of drug delivery.

[0049] Through the above technical solutions, the surgeon can achieve more precise depth control during intravaginal injection, significantly improving treatment efficacy and patient safety.

[0050] Please refer to Figure 2 and Figure 4 In one embodiment of the present invention, the end of the flexible injection tube 22 away from the rigid needle 21 has a scale 221, the length of the scale 221 being L3; L3=L1.

[0051] Specifically, the graduation 221 refers to the markings on the flexible injection tube 22 used to measure or indicate the insertion depth, which can be formed by printing, etching, or laser engraving. In this way, the operator can visually observe the changes in the insertion depth of the flexible injection tube 22, thereby achieving precise control over the insertion depth of the rigid needle 21. The purpose of introducing the graduation 221 is to solve the problem of the operator's inability to monitor the needle insertion depth in real time, improving the accuracy and convenience of the operation.

[0052] By setting a scale 221 on the flexible injection tube 22 and setting the length L3 of the scale 221 to be equal to the length L1 of the finger sleeve 1, the depth calculation process is simplified by utilizing the proportional relationship of the overall length of the device. During operation, the operator can directly determine the depth of the rigid needle 21 inserted into the patient's body by observing the changes in the scale 221 on the flexible injection tube 22. Simultaneously, since the length of the scale 221 is related to the length of the finger sleeve 1, this design not only facilitates the operator's quick understanding of depth information but also reduces additional calculation steps, improving operational efficiency. Furthermore, this scheme, combined with the overall structure of the finger sleeve 1 and the rigid needle 21, further enhances the reliability and practicality of the device in actual applications.

[0053] Through the above technical solution, the operator can monitor the depth of needle insertion in real time during the injection process, effectively solving the problem of inaccurate depth control and significantly improving the safety and accuracy of intravaginal injection treatment.

[0054] In one embodiment of the present invention, the finger sleeve 1 has a specific length of 5 cm, the rigid needle 21, the flexible injection tube 22, and the connector 23 have a total assembly length of 10 cm, and the scale 221 has a length of 5 cm. This configuration allows the operator to directly observe the reading of the scale 221 to determine the depth at which the finger sleeve-type navigation injection device 100 is inserted into the patient's body, making it convenient for the operator to use.

[0055] In one embodiment of the invention, the end of the rigid needle 21 away from the connector 23 has an injection bevel.

[0056] Specifically, the injection bevel refers to an inclined cut structure formed at the end of the rigid needle 21, which can be achieved by machining, grinding, or laser cutting. The purpose of setting the injection bevel is to optimize the mechanical properties of the needle when it penetrates the tissue, thereby reducing the insertion resistance and improving the accuracy of the operation.

[0057] By incorporating an injection bevel at its tip, the bevel effect effectively alters the force distribution when the needle contacts the tissue. As the needle penetrates the tissue, the injection bevel decomposes the originally concentrated vertical force into components in multiple directions, significantly reducing resistance to needle advancement. This design not only allows the operator to more smoothly control the depth and position of the needle but also reduces the risk of damage to surrounding tissues. Furthermore, the injection bevel design enhances tactile feedback during the procedure, facilitating real-time awareness of the needle's position and status, thereby improving injection safety and efficiency. This technique is particularly suitable for intravaginal injection scenarios requiring high precision and depth control, resolving the operational difficulties caused by the lack of optimized design in traditional long needles.

[0058] In one embodiment of the present invention, connector 23 is a Luer lock connector 23.

[0059] Specifically, the Luer lock connector 23 refers to a standardized connector 23 structure that achieves a secure connection through a threaded locking method. It can be made of medical-grade polypropylene or stainless steel, and its purpose is to provide reliable sealing performance and a stable mechanical connection. In practical applications, the Luer lock connector 23 typically consists of two parts: a female end and a male end. It achieves quick connection and separation through a rotational locking method, while ensuring that the connection will not loosen due to pressure during injection.

[0060] In the finger-cot type navigation injection device 100, the Luer lock connector 23, as a key component for connecting the syringe, achieves precise mating with the syringe through a standardized tapered interface design. During use, the operator inserts the syringe's Luer connector 23 into the female end of the Luer lock connector 23 and completes the assembly by rotating to lock it in place. This connection method not only effectively prevents drug leakage but also withstands high injection pressure, ensuring a stable and reliable process of drug transfer from the syringe through the flexible injection tube 22 to the rigid needle 21. Furthermore, the design of the connector 23 facilitates one-handed operation while wearing the finger cot 1, improving ease of use.

[0061] By adopting Luer lock connector 23, this solution solves the problem of unreliable connection of connector 23 in the injection device, significantly improves the stability and safety of the injection process, and provides a strong guarantee for accurate drug delivery.

[0062] The rigid needle 21 can be made of stainless steel or other hard, harmless alloy materials. In one embodiment of the present invention, the rigid needle 21 is made of stainless steel.

[0063] Specifically, the rigid needle 21 refers to a key component used for injecting medication, which needs to possess good rigidity, corrosion resistance, and biocompatibility. In practical applications, the needle can be made of medical-grade stainless steel, such as 304 or 316L stainless steel. These materials have been widely proven in the medical device field to have excellent mechanical properties and biocompatibility. The purpose of choosing stainless steel is to ensure that the needle will not deform, corrode, or cause adverse biological reactions during repeated use or long-term storage, thereby improving the overall safety and reliability of the device.

[0064] By using stainless steel needles, potential durability and biocompatibility issues associated with traditional needles are effectively addressed. During the procedure, the operator inserts the injection unit with the stainless steel needle into the operating cavity 1b. The needle's superior rigidity allows for precise tissue puncture, while the corrosion resistance of stainless steel prevents chemical reactions between the medication and the needle, ensuring the safety of the injection process. Furthermore, the excellent biocompatibility of stainless steel avoids tissue irritation or allergic reactions caused by material issues, which is particularly important for multi-point intravaginal injection therapy. These characteristics of the stainless steel needle ensure that the entire injection device guarantees both accurate drug delivery and the safety and reliability of the treatment process.

[0065] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A finger-type navigation injection device, characterized in that, include: A finger sleeve, the finger sleeve having an insertion cavity and an operating cavity; the insertion cavity having an insertion port for the operator's finger to be inserted, and the operating cavity having a needle outlet at the end away from the insertion port; and An injection assembly includes a rigid needle, a flexible injection tube, and a connector connected in sequence. The rigid needle and the flexible injection tube are both inserted into the operating chamber, and a portion of the rigid needle's structure is exposed at the needle outlet. The connector is used to connect a syringe so that the medication is injected into the patient's body through the connector, the flexible injection tube, and the rigid needle.

2. The finger-type navigation injection device as described in claim 1, characterized in that, The finger sleeve has a tactile part located at the end of the finger sleeve away from the finger insertion port and on the side of the finger sleeve opposite to the operating cavity.

3. The finger-type navigation injection device as described in claim 2, characterized in that, The material of the tactile part is medical-grade silicone.

4. The finger-type navigation injection device as described in claim 3, characterized in that, The thickness of the tactile part is defined as t, where 0.3mm ≤ t ≤ 0.5mm.

5. The finger-type navigation injection device as described in claim 2, characterized in that, The tactile part is elliptical in shape.

6. The finger-type navigation injection device as described in claim 1, characterized in that, The length of the finger sleeve is defined as L1, and the total length of the rigid needle, the flexible injection tube, and the connector assembly is defined as L2; ​​L2 = 2L1.

7. The finger-type navigation injection device as described in claim 6, characterized in that, The flexible injection tube has a graduation at the end away from the rigid needle, and the length of the graduation is L3; L3 = L1.

8. The finger-type navigation injection device as described in claim 1, characterized in that, The rigid needle has an injection bevel at the end away from the connector.

9. The finger-type navigation injection device as described in any one of claims 1 to 8, characterized in that, The connector is a Luer lock connector.

10. The finger-type navigation injection device as described in any one of claims 1 to 8, characterized in that, The needle is made of stainless steel.

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