Clinical compression hemostasis device for general surgery department

Abstract

The invention discloses a clinical compression hemostasis device for the general surgery department, and relates to the technical field of medical instruments. The clinical compression hemostasis device for the general surgery department comprises a clamping mechanism, a clamping block, a sliding piece, an air bag, an inflation device and a locking mechanism. The clamping mechanism comprises two clamping ends capable of relatively moving and a driving assembly for driving the two clamping ends to be close to or far away from each other, and the driving assembly can lock and maintain the relative positions of the two clamping ends so as to resist separating force which is applied externally and enables the two clamping ends to be far away from each other; the two clamping blocks are oppositely arranged and connected to the two clamping ends of the clamping mechanism correspondingly. The two sliding pieces are in sliding connection with the two clamping blocks in the clamping face directions of the clamping blocks correspondingly. The number of the air bags is two. The clinical compression hemostasis device for the general surgery department can be firmly locked in a compression state, prevents the compression unit from accidentally loosening, and supports flexible adjustment of the action area of the compression unit according to the wound position.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a pressure hemostasis device for general surgery. Background Technology

[0002] As a specialty that primarily uses surgical procedures, general surgery covers a wide range of areas, including the liver, bile ducts, gastrointestinal tract, and blood vessels. In clinical practice, it often faces various types of trauma and intraoperative bleeding. Rapid and reliable hemostasis is crucial to ensuring surgical safety and patient prognosis.

[0003] In the prior art, Chinese invention patent CN108720886A discloses a general surgical clinical pressure tourniquet, which wraps around the wound using a band with an air cushion and inflates the air cushion using an inflation device to achieve pressure hemostasis. However, this solution has at least the following drawbacks in clinical application:

[0004] Firstly, this tourniquet primarily relies on Velcro for securing the band. After the air cushion is pressurized by the inflation device, a continuous outward tension is generated within the band and the air cushion. Under this continuous and potentially significant tension, the Velcro's adhesive interface is prone to slow creep and loosening, potentially leading to accidental rupture. The sudden weakening or loss of pressure can not only cause hemostasis failure and rebleeding but also require emergency re-secured bandaging by medical personnel, interfering with the treatment process and posing a clear safety hazard.

[0005] Secondly, the air cushion of this tourniquet is usually sewn or fixed to a specific position on the tourniquet body, and its point of action (i.e., the main pressure area) relative to the tourniquet body is not adjustable. However, the location of wounds seen in general surgery clinics is varied and may be located in irregular areas such as the proximal, distal, lateral, or joint parts of the limb. When the wound location does not match the preset position of the air cushion, the pressure generated by the air cushion cannot be applied to the bleeding point, resulting in insufficient effective pressure or pressure dispersion, thus affecting the hemostatic effect. This forces clinicians to keep multiple sizes or models of tourniquets on hand, reducing versatility and ease of use. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a general surgical clinical pressure hemostasis device that can be firmly locked under pressure to prevent accidental loosening of the pressure unit, while supporting flexible adjustment of the effective area of ​​the pressure unit according to the wound location.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A general surgical clinical pressure hemostasis device includes a clamping mechanism, clamping blocks, sliding members, air bladders, an inflation device, and a locking mechanism. The clamping mechanism includes two relatively movable clamping ends and a driving assembly that drives the two clamping ends to move closer or further apart. The driving assembly can lock and maintain the relative position of the two clamping ends to resist externally applied separation forces that cause the two clamping ends to move apart. Two clamping blocks are provided, facing each other and respectively connected to the two clamping ends of the clamping mechanism. Two sliding members are provided, each slidably connected to one of the two clamping blocks along the clamping surface direction of the clamping block. Two air bladders are provided, each fixedly connected to the facing surfaces of the two sliding members. The inflation device is connected to the air bladders through an air inlet pipe. The locking mechanism is used to lock the sliding members in a predetermined position on the clamping blocks.

[0009] In some embodiments, the clamping mechanism includes a base plate, a mounting block, a lead screw, a slider, a connecting block, and a knob. The mounting block is a quadrilateral columnar structure, vertically fixed to the base plate, with an internal cavity and windows communicating with the cavity on its two opposite side walls. The lead screw is rotatably and vertically mounted in the cavity of the mounting block, and has two threaded sections with opposite directions of rotation. The two sliders are respectively mounted on the two threaded sections through threaded engagement. The two connecting blocks pass through the windows of the mounting block, with one end fixedly connected to the corresponding slider and the other end fixedly connected to the corresponding clamping block. The knob is fixedly connected to the upper end of the lead screw for driving the lead screw to rotate. The threaded engagement between the lead screw and the slider constitutes a driving assembly.

[0010] In at least one embodiment, the helix angle of the threaded engagement between the lead screw and the slider is less than the equivalent friction angle, thereby giving the threaded engagement a self-locking property.

[0011] In at least one embodiment, the clamping block is a semi-circular ring structure, and two clamping blocks are symmetrically arranged to form an annular space for accommodating limbs; the slider slides along the inner annular surface of the clamping block.

[0012] In at least one embodiment, a T-shaped limiting groove is formed on the inner ring surface of the clamping block along its arc direction; the sliding member is a T-shaped arc strip that matches the T-shaped limiting groove.

[0013] In at least one embodiment, a connecting plate is fixedly connected to the side of the slider facing the center of the clamping block, and the airbag is fixedly connected to the connecting plate.

[0014] In at least one embodiment, the side of the clamping block is provided with an arc-shaped groove that connects to the T-shaped limiting groove; the locking mechanism includes a fastening bolt movably disposed in the arc-shaped groove, and the sliding member is provided with a threaded hole that mates with the fastening bolt at a corresponding position.

[0015] Compared to existing technologies, this invention achieves at least the following beneficial effects: By setting a driving component capable of locking and maintaining the relative positions of the two clamping ends, this invention effectively overcomes the safety hazard of accidental loosening or breakage of hemostatic devices under pressure due to the failure of the fixing structure (such as Velcro). This structure can effectively resist the separation force generated by the inflation of the airbag and the force that causes the clamping ends to move away from each other, ensuring stable and reliable clamping force throughout the hemostasis process and avoiding the risk of hemostasis failure or secondary bleeding due to accidental loosening of the device. Simultaneously, by making the clamping block slidably connected to the sliding member and setting a locking mechanism for locking the position of the sliding member, this invention allows medical personnel to flexibly adjust the pressure application point of the airbag according to the specific location of the wound on the limb. In particular, through the cooperation of the T-shaped limiting groove and the sliding member, circumferential adjustment along the limb is achieved, effectively solving the defects of existing devices where the pressure unit position is fixed and cannot adapt to different wound locations, ensuring that the pressure can be accurately applied to the bleeding point, thereby improving the hemostatic effect. Attached Figure Description

[0016] One or more embodiments of the invention will now be described by way of example only with reference to the accompanying drawings, in which:

[0017] Figure 1 This is a schematic diagram of the general surgery clinical pressure hemostasis device according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Exploded view of the general surgery clinical pressure hemostasis device in the embodiment;

[0019] Figure 3 This is a schematic diagram of the structure of the airbag mounted on the clamping block according to an embodiment of the present invention;

[0020] Figure 4 for Figure 3 A sectional view.

[0021] The following numbers are labeled in the diagram: 100, clamping mechanism; 110, base plate; 120, mounting block; 121, window; 130, lead screw; 140, slider; 150, connecting block; 160, knob; 200, clamping block; 210, T-shaped limiting groove; 220, arc groove; 230, fastening bolt; 300, sliding component; 310, connecting plate; 400, airbag; 500, inflation device. Detailed Implementation

[0022] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of the present invention more complete and to fully convey the inventive concept to those skilled in the art.

[0023] In the description of this invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0024] To address the shortcomings of existing pressure-based hemostasis devices, such as the tendency for the fixing structure to loosen during pressure application and the inability to adapt the fixed position of the pressure unit to the wound location, the inventors, after careful analysis, discovered that the main reasons for these problems in existing pressure-based hemostasis devices are: firstly, they rely on pure friction methods such as Velcro for fixation, lacking reliable mechanical locking ability under the tension generated by continuous pressure; secondly, their pressure unit (such as an air cushion) is fixedly connected to the main structure, lacking an adjustment mechanism that allows for flexible movement and relocking. Based on the above analysis, the inventors have made structural improvements to the overall structure of the pressure-based hemostasis device, particularly its clamping and driving method and the connection method of the pressure unit.

[0025] like Figures 1 to 4 As shown, the general surgical clinical pressure hemostasis device of the present invention includes a clamping mechanism 100, a clamping block 200, a sliding member 300, an air bladder 400, and an inflation device 500.

[0026] refer to Figure 2 The clamping mechanism 100 is the foundation for the stable clamping of this device. Its core lies in providing a drive component that can lock and maintain the clamping state to resist the outward tension generated after the airbag 400 is inflated, and to prevent the clamping end from accidentally popping open. Specifically, the clamping mechanism 100 includes a base plate 110, a mounting block 120, a lead screw 130, a slider 140, a connecting block 150, and a knob 160.

[0027] The base plate 110 serves as the base of the entire device, providing stable support.

[0028] The mounting block 120 is a quadrilateral columnar structure that is vertically fixed on the base plate 110. It has an internal cavity and windows 121 that connect to the internal cavity are symmetrically opened on two opposite side walls.

[0029] The lead screw 130 is formed by two threaded shafts with opposite directions of rotation, coaxially fixedly connected. The lead screw 130 is rotatably and vertically installed in the cavity of the mounting block 120. Specifically, in this embodiment, the top and bottom of the mounting block 120 are respectively provided with through holes communicating with the cavity, and the upper and lower ends of the lead screw 130 serve as pivots, rotatably supported in these two through holes respectively.

[0030] Two sliders 140 are provided, and the two sliders 140 are respectively installed on the two threaded sections of the lead screw 130 with opposite directions of rotation via threaded engagement. Specifically, in this embodiment, the two sliders 140 are symmetrically arranged with respect to the axial center of the lead screw 130, and are respectively screwed onto the left-hand and right-hand threaded sections. A threaded hole (i.e., a "threaded hole") matching the threaded section of the lead screw 130 is opened on the upper surface and through the lower surface of each slider 140, so that the slider 140 can be screwed onto the lead screw 130. Through the symmetrical installation method, it is ensured that when the lead screw 130 rotates, the two sliders 140 can always perform synchronous and symmetrical linear movements towards or away from each other.

[0031] Two connecting blocks 150 are provided, both of which are rectangular block structures. They extend in the same direction from two opposite windows 121 on the mounting block 120. Specifically, in this embodiment, both connecting blocks 150 extend towards the right side of the device. One end of the connecting block 150 inside the mounting block 120 is fixedly welded to the corresponding slider 140, while the other end extending through the window 121 extends to the outside of the mounting block 120 for connecting to the clamping block 200. The inner wall of the window 121 and the side of the connecting block 150 form a sliding fit. This allows the connecting block 150 to slide smoothly along the length of the window while being constrained in a plane perpendicular to the direction of movement, preventing unnecessary deflection or shaking, thereby guiding and stabilizing the movement of the connecting block 150.

[0032] The knob 160 is fixedly connected to the upper end of the lead screw 130 and exposed on the top of the mounting block 120, making it easy for medical staff to operate manually.

[0033] In this embodiment, the threaded engagement between the lead screw 130 and the two sliders 140 together constitutes the drive assembly that realizes the driving and locking functions.

[0034] When the screw 130 is rotated via knob 160, the two sliders 140, due to the opposite directions of the two threads, cause the connecting block 150 and the clamping block 200 to move closer or further apart synchronously. Once the clamping block 200 has secured the patient's limb, rotation of knob 160 is stopped. At this point, the threaded pair between the screw 130 and the slider 140 utilizes its inherent self-locking characteristic to lock the screw. The design of this threaded pair ensures that its helix angle is less than the equivalent friction angle, thus achieving reverse self-locking. This means that the axial separation force generated by the airbag inflation, attempting to open the clamping block, cannot drive the threaded pair to rotate in the opposite direction. This self-locking characteristic allows the drive assembly to firmly "lock and maintain" the relative position of the two clamping ends without external torsional operation, effectively resisting the separation force caused by airbag inflation and fundamentally avoiding the risk of the clamping block accidentally springing open.

[0035] refer to Figure 3 and Figure 4 In order to achieve the purpose of flexibly adjusting the pressure point according to the wound location, this embodiment provides a sliding and locking adjustment structure between the clamping block 200 and the airbag 400.

[0036] Specifically, two clamping blocks 200 are provided, both of which are semi-circular ring structures. A protrusion is provided in the middle of their outer ring surface, and this protrusion is fixedly welded to the end of the connecting block 150. The two clamping blocks 200 are symmetrically arranged and facing each other, forming an openable ring for wrapping around the patient's limb. A T-shaped limiting groove 210 is machined along the arc direction on the inner ring surface of each clamping block 200.

[0037] The slider 300 is a T-shaped arc strip that matches the shape of the T-shaped limiting groove 210. Its cross-section is T-shaped, allowing it to fit into the T-shaped limiting groove 210 and slide smoothly along the arc-shaped trajectory of the groove. This T-shaped fit ensures that the slider 300 will not detach from the clamping block 200, while allowing for position adjustment along the arc path. A connecting plate 310 is fixedly connected to the inner side of the slider 300 facing the center.

[0038] The airbag 400 is fixedly attached to the connecting plate 310. Each of the sliding parts 300 on each clamping block 200 is connected to an airbag 400. By moving the sliding parts 300, the airbag 400 can be directly moved to change its position along the circumference of the limb.

[0039] To ensure the stable fixation of the sliding member 300 after adjustment and to prevent accidental displacement during pressurization or patient movement, this embodiment is equipped with a mechanical locking mechanism.

[0040] The locking mechanism includes the following specific structure: An arc-shaped groove 220 communicating with an internal T-shaped limiting groove 210 is formed on the side of the clamping block 200. A fastening bolt 230 is movably installed within this arc-shaped groove 220. Correspondingly, a threaded hole for engaging the fastening bolt 230 is machined on the side of the sliding member 300 at the position corresponding to the arc-shaped groove 220. When the sliding member 300 slides to the desired position, aligning the airbag 400 with the wound, the fastening bolt 230 is tightened. The tightened end of the bolt abuts against the wall of the arc-shaped groove 220 on the side of the clamping block 200, and simultaneously, the tension of the thread pulls the sliding member 300 tightly towards one side of the T-shaped limiting groove 210, generating a large static friction force, thereby firmly locking the sliding member 300 in its current position and preventing displacement during pressure application or patient movement.

[0041] The inflation device 500 is a manually inflatable airbag that is connected to two airbags 400 through an air inlet pipe. It is used to inflate the airbags 400 after they are clamped in place, so that they expand and apply pressure to the wound.

[0042] The method of using this general surgery clinical pressure hemostasis device is as follows: First, locate and adjust the device according to the specific position of the patient's wound on the limb. Specifically, slide the slider 300 on one of the clamping blocks 200, moving the connected airbag 400 to face the center of the wound. Then, slide the slider 300 on the other clamping block 200, moving its airbag 400 to a position symmetrical to the first airbag 400. This symmetrical arrangement ensures even pressure distribution and prevents pressure sores from forming due to direct contact between the back of the limb and the clamping blocks 200. After adjustment, tighten the two fastening bolts 230 to lock the slider 300. Next, place sterile gauze between the airbag 400 facing the wound and the wound. Then, place the patient's limb between the two open clamping blocks 200 and rotate the knob 160 to drive the clamping blocks 200 to close until they encircle the limb; at this point, the self-locking function of the screw 130 will be activated. Then, the inflation device 500 is operated to simultaneously inflate the two airbags 400, causing the airbags to expand and apply radial pressure to the wound area through the gauze to achieve hemostasis. During this process, the self-locking function of the clamping mechanism prevents the clamping block from being pried open, while the locking mechanism ensures the stability of the airbag position. After hemostasis is achieved, the air pressure inside the airbags 400 is first released through the inflation device 500, then the knob 160 is rotated in the opposite direction to release the clamping block 200, and finally the device is removed from the limb.

[0043] It should be understood that all the above embodiments are exemplary and not restrictive. Various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of the present invention should be within the protection scope of the present invention.

Claims

1. A general surgical clinical pressure hemostasis device, characterized in that: The device includes a clamping mechanism, clamping blocks, sliding members, airbags, an inflation device, and a locking mechanism. The clamping mechanism includes two relatively movable clamping ends and a drive assembly that drives the two clamping ends to move closer or further apart. The drive assembly locks and maintains the relative position of the two clamping ends to resist externally applied separation forces that would cause the two clamping ends to move apart. Two clamping blocks are provided, facing each other and respectively connected to the two clamping ends of the clamping mechanism. Two sliding members are provided, each slidingly connected to one of the two clamping blocks along the clamping surface direction of the clamping blocks. Two airbags are provided, each fixedly connected to the facing surfaces of the two sliding members. The inflation device is connected to the airbags through an air inlet pipe. The locking mechanism is used to lock the sliding members in a predetermined position on the clamping blocks.

2. The general surgery clinical pressure hemostasis device according to claim 1, characterized in that: The clamping mechanism includes a base plate, a mounting block, a lead screw, a slider, a connecting block, and a knob. The mounting block is a quadrilateral columnar structure, vertically fixed to the base plate, with an internal cavity and windows communicating with the cavity on its two opposite side walls. The lead screw is rotatably mounted vertically within the cavity of the mounting block, and has two threaded sections with opposite directions of rotation. The two sliders are respectively mounted on the two threaded sections via threaded engagement. The two connecting blocks pass through the windows of the mounting block, with one end fixedly connected to the corresponding slider and the other end fixedly connected to the corresponding clamping block. The knob is fixedly connected to the upper end of the lead screw and is used to drive the lead screw to rotate. The threaded engagement between the lead screw and the slider constitutes a driving assembly.

3. The general surgery clinical pressure hemostasis device according to claim 2, characterized in that: The helix angle of the threaded engagement between the lead screw and the slider is less than the equivalent friction angle, which makes the threaded engagement self-locking.

4. The general surgery clinical pressure hemostasis device according to claim 1, characterized in that: The clamping block has a semi-circular ring structure, and two clamping blocks are symmetrically arranged to form an annular space for accommodating limbs; the sliding member slides along the inner ring surface of the clamping block.

5. The general surgery clinical pressure hemostasis device according to claim 4, characterized in that: The clamping block has a T-shaped limiting groove on its inner ring surface along its arc direction; the sliding member is a T-shaped arc strip that matches the T-shaped limiting groove.

6. The general surgery clinical pressure hemostasis device according to claim 5, characterized in that: The sliding member is fixedly connected to a connecting plate on the side facing the center of the clamping block, and the airbag is fixedly connected to the connecting plate.

7. The general surgical clinical pressure hemostasis device according to claim 5 or 6, characterized in that: The clamping block has an arc-shaped groove on its side that connects to the T-shaped limiting groove; the locking mechanism includes a fastening bolt that is movably disposed in the arc-shaped groove, and the sliding member has a threaded hole that mates with the fastening bolt at the corresponding position.

8. The general surgery clinical pressure hemostasis device according to claim 1, characterized in that: The inflation device is a manually inflatable balloon.

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