An extracorporeal restraining assembly for supporting a puncturing instrument
By designing an external limiting component and utilizing the cooperation of a substrate and an airbag support, the problem of displacement of the puncture instrument within the body was solved, achieving both accuracy and safety in puncture and avoiding tissue damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-04-28
- Publication Date
- 2026-07-14
Smart Images
Figure CN224484121U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical devices, and more specifically, relates to an external limiting component for supporting puncture instruments. Background Technology
[0002] Puncture, a common medical procedure, refers to the insertion of a puncture instrument into the body to obtain specimens such as fluids or tissues, either alone or in combination with other specialized equipment. It is also used to perform local treatments by injecting drugs, implanting devices, or altering the body's physical and chemical environment. Puncture instruments are various specialized medical devices used to perform these examinations and treatments.
[0003] When performing a puncture, the location and extent of the lesion are first determined by recent and puncture-time imaging data. After developing a safe and reasonable puncture path, the puncture site and surrounding skin are disinfected. Local anesthesia is administered from the puncture site along the puncture path. Then, under the guidance of imaging equipment, the puncture instrument is accurately inserted into the lesion tissue or its surroundings along the preset puncture path as needed for medical work. Finally, the puncture instrument and other specialized equipment are used for examination and treatment.
[0004] Puncture is an invasive procedure that requires a high degree of precision. However, given the current level of advancements in puncture guidance technology, the vast majority of punctures still require manual intervention by medical personnel. During the puncture process, slight movements of the medical staff's body, especially their hands, physiological breathing movements of the patient, involuntary movements caused by tension, fear, or fatigue, and the gravity of the puncture instrument itself can all lead to unpredictable angular or axial displacement of the instrument within the body. This can cause the instrument to deviate from its puncture path or even result in tissue damage. If such displacement occurs after the instrument has reached the target area, it will affect subsequent examination results and treatment outcomes, and may even lead to false negative results or organ damage and other treatment complications, causing serious harm to the patient. Utility Model Content
[0005] In view of the above-mentioned defects or improvement needs in existing puncture techniques and operating procedures, this utility model provides a limiting component for supporting puncture instruments. It can support puncture instruments during puncture and subsequent examinations and treatments, and avoid angular and axial displacement of puncture instruments caused by various involuntary movements of operators and patients and the weight of the puncture instruments themselves.
[0006] To achieve the above objectives, according to this utility model, an external limiting assembly for supporting a puncture instrument is provided. The puncture instrument has a needle body for puncture and a needle handle for gripping. The external limiting assembly includes a base plate, an air bladder, and a support seat, wherein:
[0007] The lower surface of the substrate is covered with adhesive for attaching to human skin, and the upper surface of the substrate holds the airbag. The airbag has an air nozzle so that the airbag can be inflated and deflated by an external inflation / deflation device.
[0008] One end of the support is hinged to the base plate via a first hinge axis for contacting and supporting the puncture instrument. The support is placed on the airbag to rotate about the center line of the first hinge axis when the airbag is inflated or deflated.
[0009] Preferably, the external limiting component further includes a clamp detachably mounted on the support to hold and fix the needle body.
[0010] Preferably, the clamp is provided with a connecting seat, and the connecting seat is provided with a limiting hole;
[0011] The support base is provided with a limiting boss, which is engaged in the limiting hole, thereby allowing the clamp to be detachably installed on the support base.
[0012] Preferably, the support seat has multiple limiting protrusions arranged in multiple rows, and correspondingly, the connecting seat also has multiple rows of limiting holes. The arrangement direction of each row of limiting protrusions is perpendicular to the axis of the first hinge shaft, so as to adjust the distance between the connecting seat and the first hinge shaft so that the clamp can better adapt to the length of the puncture instrument.
[0013] Preferably, the support base includes a support extension plate and a rotating plate detachably connected together. The rotating plate supports the support extension plate and is hinged to the base plate via the hinge axis. The end of the support extension plate away from the first hinge axis extends beyond the end of the rotating plate away from the first hinge axis to better accommodate the length of the puncture instrument.
[0014] Preferably, the rotating plate is provided with a limiting protrusion, and the supporting extension plate is provided with a limiting groove that cooperates with the limiting protrusion. The limiting protrusion is inserted into the limiting groove so that the supporting extension plate can be detachably installed on the rotating plate.
[0015] Preferably, the rotating plate has multiple limiting protrusions arranged in multiple rows, and correspondingly, the supporting extension plate also has multiple rows of limiting grooves. The arrangement direction of each row of limiting protrusions is perpendicular to the axis of the first hinge shaft, so as to adjust the distance between the supporting extension plate and the first hinge shaft so that the supporting extension plate can better adapt to the length of the puncture instrument.
[0016] Preferably, the external limiting component further includes a clamp for holding the needle body;
[0017] The clamp is provided with a connecting seat, and the connecting seat is provided with a limit hole;
[0018] The support extension plate is provided with a limiting boss, which is engaged in the limiting hole, thereby allowing the clamp to be detachably installed on the support base.
[0019] Preferably, the end of the support base away from the first hinge axis is provided with a clearance notch to accommodate the needle handle.
[0020] Preferably, it also includes sterile gauze filled between the support and the substrate for use in conjunction with the airbag to support the support.
[0021] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:
[0022] 1) An external limiting component for supporting puncture instruments according to this utility model has adhesive on the lower surface of the base plate, which can be attached to the skin of the body for fixation; during the puncture process, by inflating and deflating the balloon to a certain extent, the angle between the base plate and the support can be flexibly adjusted to accommodate the operator's continuous adjustment of the angle of the puncture instrument during the puncture process. When the operator is unable to hold the puncture instrument for a short period of time (such as when performing a CT scan to clarify the internal location of the puncture instrument), the puncture instrument can be temporarily supported.
[0023] 2) An external limiting component for supporting puncture instruments according to this utility model, after puncture is completed and during subsequent examinations and treatments, the airbag on the base plate is appropriately inflated and deflated to fix the angle between the support and the base plate. With the help of clamps to hold and fix the needle body, the support can match the position of the puncture instrument at a more precise angle and support the puncture instrument. This avoids various involuntary movements of the operator and the patient and the angular and axial displacement of the puncture instrument caused by the weight of the puncture instrument itself, so as to prevent the puncture instrument from falling out of the body or crossing the puncture point in the body.
[0024] 3) An external limiting component for supporting puncture instruments according to this utility model has a rotating plate and a supporting extension plate. The rotating plate alone or a combination of the rotating plate and the supporting extension plate can be used depending on the external length of the puncture instrument. When using conventional puncture instruments with a short length, the rotating plate alone can be used to support the puncture instrument. When the length of the puncture instrument is relatively long, the supporting extension plate is installed on the rotating plate. The supporting extension plate can extend the support range of the rotating plate and better adapt to and support the puncture instrument according to the length of the external part of the puncture instrument.
[0025] 4) An external limiting component for supporting puncture instruments according to this utility model can use a temporary filling material such as sterile gauze between the balloon and the support seat. It can work together with the balloon to support the support seat, so that the support seat can be quickly adjusted into place to support the puncture instrument. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the initial position of the external limiting component in Example 1;
[0027] Figure 2 for Figure 1 A schematic diagram of the support base after rotating 180°;
[0028] Figure 3 This is a schematic diagram of Example 2;
[0029] Figure 4 This is a schematic diagram of the initial position of the external limiting component in Example 3;
[0030] Figure 5 This is a schematic diagram of the initial position of the external limiting component in Example 4;
[0031] Figure 6 This is a schematic diagram of the support extension plate in Embodiments 3 and 4;
[0032] Figure 7 This is a schematic diagram of the clips used in Examples 2 and 4. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.
[0034] Example 1
[0035] Reference Figure 1 , Figure 2 An external restraint assembly for supporting a puncture instrument, the puncture instrument having a needle body for puncture and a needle handle for gripping, the external restraint assembly includes a base plate 101, an air bladder 102, and a support base 103. The lower surface of the base plate 101 is covered with adhesive for adhesion to human skin. The air bladder 102 is placed on the upper surface of the base plate 101. The air bladder 102 has an air nozzle for inflation and deflation via an external inflation / deflation device. The air bladder 102 can be fixed to the upper surface of the base plate 101. The external inflation device is preferably a medical syringe.
[0036] One end of the support 103 is hinged to the base plate 101 via a first hinge 104 for contacting and supporting the puncture instrument. The center line of the first hinge 104 is preferably parallel to the base plate 101, so that the support 103 can rotate toward or away from the base plate 101. The support 103 is placed on the airbag 102 so that it can rotate around the center line of the first hinge 104 when the airbag 102 is inflated or deflated. In this way, the support 103 can move toward the puncture instrument by rotating upward, thereby supporting the puncture instrument.
[0037] The support base 103 in this embodiment can be a plate, a block structure, or a frame structure, and is a non-removable integral structure.
[0038] The support seat 103 is provided with a clearance notch 105 at one end away from the first hinge shaft 104 to accommodate the needle handle. The needle handle is stored in the clearance notch 105, and the needle body can directly contact the support seat 103.
[0039] Sterile gauze can be filled between the support 103 and the base plate 101 to cooperate with the airbag 102 to support the support 103.
[0040] In the initial state, the combination structure of the support base 103 and the substrate 101 is completely folded and closed, with an inflatable airbag 102 disposed in between. By inflating the airbag 102, the support base 103 and the substrate 101 can be slowly separated.
[0041] The area occupied by the airbag 102 on the upper surface of the substrate 101 should be as large as possible so that it can better support the support base 103.
[0042] Example 2
[0043] Reference Figure 3 Compared to Embodiment 1, this embodiment adds a clip 206 that can be detachably mounted on the support 203 to hold the needle body. The connection and installation of the base plate 201, airbag 202, support 203, first hinge 204 and clearance notch 205 in Embodiment 2 are the same as in Embodiment 1.
[0044] The clip 206 can be a conventional clip, comprising two clamping plates, a second hinge pin, a torsion spring, and a connecting seat 207. The two clamping plates are hinged together by the second hinge pin, on which the torsion spring is threaded. Each end of the torsion spring abuts against one of the clamping plates. The clip 206 can be connected to the support seat 203 in any existing manner, such as by making holes in both the clip 206 and the support seat 203, and then inserting a pin through the holes in the clip 206 and into the holes in the support seat 203.
[0045] In this embodiment, the clip 206 can adopt a shark clip structure. The clip 206 is provided with a connecting seat 207, which has a limiting hole. The support base 203 is provided with a limiting boss 208. The limiting boss 208 engages with the limiting hole, thereby detachably mounting the clip 206 onto the support base 203. At least one of the clamping plates is fixedly mounted with the connecting seat 207.
[0046] In this embodiment, the clip 206 is a spring-loaded metal clip structure, and when closed, the two wings extend horizontally.
[0047] The support 203 has multiple limiting bosses 208 arranged in multiple rows. In this embodiment, two rows are preferably provided. Correspondingly, the connecting seat 207 also has multiple rows of limiting holes. The arrangement direction of each row of limiting bosses 208 is perpendicular to the axis of the first hinge shaft 204, so as to adjust the distance between the connecting seat 207 and the first hinge shaft 204 to allow the clamp 206 to better adapt to the length of the puncture instrument.
[0048] It should be noted that the position of the limiting hole changes in space during the opening and closing of the clamp 206. After the clamp 206 clamps the needle of the puncture instrument, the limiting hole should be able to engage with the limiting boss 208.
[0049] When clamp 206 is needed, some air can be released from the balloon 202, causing the support 203 to lower and separate from the puncture instrument. After the needle body is separated from the support 203, temporarily fix the needle with one hand, and use the other hand to clamp clamp 206 onto the needle body and attach clamp 206 to the support 203. After the puncture instrument is secured with clamp 206, inflate balloon 202 to raise the support 203 to support the puncture instrument.
[0050] When it is necessary to use clamp 206 to hold the needle body, it means that the puncture instrument has been inserted into place. At this time, there will be a slight tremor when holding the needle handle, and the puncture instrument will vibrate slightly around the puncture point in the body. This will not affect subsequent treatment or examination.
[0051] Example 3
[0052] Reference Figure 4 , Figure 5 An external restraint assembly for supporting a puncture instrument, the puncture instrument having a needle body for puncture and a needle handle for gripping, the external restraint assembly includes a base plate 301, an air bladder 302, and a support base 303. The lower surface of the base plate 301 is covered with adhesive for adhesion to human skin. The upper surface of the base plate 301 holds the air bladder 302, which has an air nozzle for inflation and deflation via an external inflation / deflation device. The air bladder 302 can be fixed to the upper surface of the base plate 301. The external inflation device is preferably a medical syringe.
[0053] One end of the support 303 is hinged to the base plate 301 via a first hinge 304 for contacting and supporting the puncture instrument. The center line of the first hinge 304 is preferably parallel to the base plate 301, so that the support 303 can rotate toward or away from the base plate 301. The support 303 is placed on the airbag 302 so that it can rotate around the center line of the first hinge 304 when the airbag 302 is inflated or deflated. In this way, the support 303 can move toward the puncture instrument when it rotates upward, thereby supporting the puncture instrument.
[0054] The support base 303 in this embodiment includes two plates, namely a support extension plate 306 and a rotating plate 307 that are detachably connected together. The rotating plate 307 supports the support extension plate 306 and is hinged to the base plate 301 via the hinge axis. The end of the support extension plate 306 away from the first hinge axis 304 extends beyond the end of the rotating plate 307 away from the first hinge axis 304 to better accommodate the length of the puncture instrument.
[0055] The rotating plate 307 is provided with a limiting protrusion 308, and the supporting extension plate 306 is provided with a limiting groove 310 that cooperates with the limiting protrusion 308. The limiting protrusion 308 is inserted into the limiting groove 310 so that the supporting extension plate 306 can be detachably installed on the rotating plate 307.
[0056] The rotating plate 307 has multiple limiting protrusions 308 arranged in multiple rows. Correspondingly, the supporting extension plate 306 also has multiple rows of limiting grooves 310. The arrangement direction of each row of limiting protrusions 308 is perpendicular to the axis of the first hinge shaft 304, so as to adjust the distance between the supporting extension plate 306 and the first hinge shaft 304 so that the supporting extension plate 306 can better adapt to the length of the puncture instrument.
[0057] The support extension plate 306 has a groove 309 at one end away from the first hinge shaft 304, so that the bottom of the groove 309 supports the needle handle of the puncture instrument. For example, for puncture instruments such as ablation needles, the handle is relatively large, and the groove 309 can restrict the movement of the handle of the puncture instrument.
[0058] The support extension plate 306 is used to extend the support distance of the rotating plate 307 and assist the clamp in fixing the puncture instrument. Both the rotating plate 307 and the support extension plate 306 are U-shaped. The front sections of both arms of the support extension plate 306 are perforated and fixed to the limiting protrusions on the rotating plate 307. The rear section of the support extension plate 306 is provided with a limiting boss, which can fix the clamp.
[0059] The rotating plate 307 has a clearance notch 305 at one end away from the first hinge shaft 304 to accommodate the needle handle. The needle handle is stored in the clearance notch 305, and the needle body can directly contact the support extension plate 306.
[0060] This embodiment is an improvement on the support base 303 of Embodiment 1, which uses an integral plate, by adding a support extension plate 306. For conventional puncture instruments of short length, the support extension plate 306 of Embodiment 3 is not needed and can be removed. Therefore, the structure of this embodiment without the support extension plate 306 is equivalent to the external limiting component of Embodiment 1. For puncture instruments of longer length, such as ablation needles, during ablation, because the external segment of the ablation needle is relatively long and the tip expands, a support extension plate 306 needs to be added to the structure of Embodiment 1 to extend the support range.
[0061] Example 4
[0062] Compared to Embodiment 3, this embodiment adds a clip 412 that can be detachably mounted on the support extension plate 406 to hold the needle body. The connection and installation of the base plate 401, airbag 402, support seat 403, first hinge pin 404, clearance notch 405, support extension plate 406, rotating plate 407, limiting protrusion 408, groove 409, limiting slot 410, etc. in this embodiment are the same as in Embodiment 3.
[0063] In this embodiment, the clip 412 can adopt a structure similar to a shark clip. The clip 412 is provided with a connecting seat 413, and the connecting seat 413 is provided with a limiting hole.
[0064] The support extension plate 406 is provided with a limiting boss 411, which engages with a limiting hole on the connecting seat 413, thereby detachably mounting the clamp 412 onto the support seat 403. The connecting seat 413 is fixedly mounted on at least one of the clamps.
[0065] The limiting boss 411 on the support extension plate 406 of Embodiment 4 may be the same size or different from the limiting protrusion 408 on the rotating plate 407 of Embodiment 3.
[0066] The use of clip 412 in this embodiment is the same as the use of clip in embodiment 2.
[0067] The above four embodiments correspond to different application scenarios of the external restraint device. Embodiment 1 can be used for supporting conventional puncture instruments of short length; Embodiment 2 can be used for supporting and clamping conventional puncture instruments of short length; Embodiment 3 can be used for supporting puncture instruments of relatively long length; and Embodiment 4 can be used for supporting and clamping puncture instruments of relatively long length.
[0068] During puncture, after the operator has determined the puncture point location and needle insertion angle, the base plate is first fixed to the side where the puncture path diameter forms an acute angle with the skin. The needle is then inserted through the planned puncture point. If it is necessary to pause or check the position of the puncture instrument within the body during insertion, the support can be lifted, and sterile gauze can be used to fill the space between the support and the base plate at an angle. Alternatively, the balloon can be inflated to ensure full contact between the support and the puncture instrument, thus supporting the instrument. During the puncture, the position of the support can be changed by adjusting the balloon volume and the gauze filling level, thereby adjusting the support angle.
[0069] After the inner end of the puncture instrument reaches the preset position, the balloon is inflated slightly to increase the support of the support structure on the puncture instrument. Depending on the puncture diameter angle, sterile gauze may or may not be filled between the balloon and the support structure.
[0070] If the puncture instrument shifts outward or inward along the long axis of the puncture diameter during the puncture process, or if the puncture instrument needs to remain in the body for a period of time due to treatment requirements, during which there is a possibility of shifting outward or inward, then it is necessary to use clamps to fix it.
[0071] When the operator fixes the external part of the puncture instrument along the long axis of the puncture diameter, a support extension plate may or may not be used, depending on the length of the external part of the puncture instrument.
[0072] When using the support extension plate, according to the length of the external segment of the puncture instrument, engage the holes on the front sections of both arms of the support extension plate with the limiting protrusions at appropriate length positions on both sides of the rotating plate.
[0073] When fixing the external segment of the puncture instrument, the operator opens the clamp and clamps the needle body of the puncture instrument. The limiting hole on the clamp's connecting seat engages with the limiting protrusion on the support seat. If the position of the puncture instrument inside the body needs to be adjusted later, the operation can be reversed following the steps described above.
[0074] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An external restraint assembly for supporting a puncture instrument, the puncture instrument having a needle body for puncture and a needle handle for gripping, characterized in that, The external restraint assembly includes a base plate, an airbag, and a support base, wherein: The lower surface of the substrate is covered with adhesive for attaching to human skin, and the upper surface of the substrate holds the airbag. The airbag has an air nozzle so that the airbag can be inflated and deflated by an external inflation / deflation device. One end of the support is hinged to the base plate via a first hinge axis for contacting and supporting the puncture instrument. The support is placed on the airbag to rotate about the center line of the first hinge axis when the airbag is inflated or deflated.
2. The external limiting assembly for supporting a puncture instrument according to claim 1, characterized in that, The external limiting assembly also includes a clamp that is detachably mounted on the support to hold the needle.
3. An external limiting assembly for supporting a puncture instrument according to claim 2, characterized in that, The clamp is provided with a connecting seat, and the connecting seat is provided with a limit hole; The support base is provided with a limiting boss, which is engaged in the limiting hole, thereby allowing the clamp to be detachably installed on the support base.
4. An external limiting assembly for supporting a puncture instrument according to claim 3, characterized in that, The support seat has multiple limiting protrusions arranged in multiple rows. Correspondingly, the connecting seat also has multiple rows of limiting holes. The arrangement direction of each row of limiting protrusions is perpendicular to the axis of the first hinge shaft, so as to adjust the distance between the connecting seat and the first hinge shaft so that the clamp can better adapt to the length of the puncture instrument.
5. An external limiting assembly for supporting a puncture instrument according to claim 1, characterized in that, The support base includes a support extension plate and a rotating plate detachably connected together. The rotating plate supports the support extension plate and is hinged to the base plate via the hinge axis. The end of the support extension plate away from the first hinge axis extends beyond the end of the rotating plate away from the first hinge axis to better accommodate the length of the puncture instrument.
6. An external limiting assembly for supporting a puncture instrument according to claim 5, characterized in that, The rotating plate is provided with a limiting protrusion, and the support extension plate is provided with a limiting groove that cooperates with the limiting protrusion. The limiting protrusion is inserted into the limiting groove so that the support extension plate can be detachably installed on the rotating plate.
7. An external limiting assembly for supporting a puncture instrument according to claim 6, characterized in that, The rotating plate has multiple limiting protrusions arranged in multiple rows. Correspondingly, the supporting extension plate also has multiple rows of limiting grooves. The arrangement direction of each row of limiting protrusions is perpendicular to the axis of the first hinge shaft, so as to adjust the distance between the supporting extension plate and the first hinge shaft so that the supporting extension plate can better adapt to the length of the puncture instrument.
8. An external limiting assembly for supporting a puncture instrument according to claim 5, characterized in that, The external limiting component also includes a clamp for holding the needle body; The clamp is provided with a connecting seat, and the connecting seat is provided with a limit hole; The support extension plate is provided with a limiting boss, which is engaged in the limiting hole, thereby allowing the clamp to be detachably installed on the support base.
9. An external limiting assembly for supporting a puncture instrument according to claim 1, characterized in that, The support seat has a clearance notch at the end away from the first hinge axis to accommodate the needle handle.
10. An external limiting assembly for supporting a puncture instrument according to claim 1, characterized in that, It also includes sterile gauze filled between the support and the substrate for use in conjunction with the airbag to support the support.