A remote radial compression hemostat

Abstract

The present application relates to the technical field of medical devices, and provides a far radial compression hemostat, which comprises a fixing plate, a compression structure, an inner rotating cap, a pressure adjusting rotating cap and a locking structure; the pressure adjusting rotating cap is sleeved on the outer side of the inner rotating cap in a relatively rotatable and axially movable manner, and is connected with the compression structure; the locking structure comprises a first locking part arranged at the bottom of the pressure adjusting rotating cap and a second locking part arranged on the outer surface of the inner rotating cap; the first locking part and the second locking part are engaged and locked by pressing the pressure adjusting rotating cap, and the two are disengaged by lifting the pressure adjusting rotating cap. The hemostat locks the circumferential rotation of the pressure adjusting rotating cap through the pressing type locking structure, effectively prevents the loosening of the knob and the attenuation of the pressure, and simultaneously realizes the integrated operation of pressure adjusting, locking and unlocking, thereby improving the pressure stability and operation convenience of postoperative hemostasis of far radial puncture.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a distal radial compression hemostat. Background Technology

[0002] Following distal radial artery puncture and intervention, a compression hemostat is required to apply pressure to the puncture sites on the patient's hand, such as the nasal cavity and Hegu acupoint area, to achieve hemostasis. The distal radial arteries are narrow in diameter, superficial, and have limited interstitial spaces, placing higher demands on the pressure stability and reliability of the hemostat. Currently used distal radial compression hemostats mainly consist of a fixation plate, a strap, a compression body, and a threaded pressure adjustment mechanism. During use, the hemostat is secured to the patient's hand with the strap, and rotating the adjustment knob drives the screw to lower the compression body, applying pressure to the puncture site to achieve hemostasis.

[0003] However, existing distal radial hemostats generally have the following drawbacks in use: First, they are unstable under high pressure and prone to pressure release. The skin in the distal radial region has high mobility, and patients often unconsciously clench their fists, flex their wrists, or slightly turn over post-operatively. The pressure adjustment knob of existing hemostats relies solely on the friction of the threaded joint to maintain its position. Under high pressure, vibrations and displacements caused by the patient's hand movements are easily transmitted to the adjustment knob, leading to unexpected loosening and rapid pressure decay. Clinical data shows that the average pressure decay can reach over 30% within 2 hours post-operation. To ensure hemostasis, medical staff need to frequently check and repressurize, significantly increasing the workload of clinical nursing. Second, after pressure adjustment, the knob of existing hemostats remains freely rotating, requiring extra care to maintain its position until the entire procedure is completed. Even slight carelessness can lead to knob displacement and pressure changes. This operating method not only reduces clinical efficiency but also increases the uncertainty of hemostasis. Summary of the Invention

[0004] Therefore, the present invention aims to solve the problems of poor stability, easy pressure leakage, and inconvenience of use of the distal radial compression hemostat in the prior art under high pressure, and to provide a distal radial compression hemostat.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: This invention provides a distal radial compression hemostat, comprising: a fixing plate; a compression structure disposed on the fixing plate for compressing the distal radial puncture point; an inner rotating cap mounted on the fixing plate; a pressure adjusting cap rotatably and axially movable, sleeved on the outside of the inner rotating cap; the pressure adjusting cap is connected to the compression structure, and rotating the pressure adjusting cap drives the compression structure to rise and fall to adjust the compression force; a locking structure including a first locking part disposed at the bottom of the pressure adjusting cap and a second locking part disposed on the outer surface of the inner rotating cap; pressing the pressure adjusting cap engages the first locking part with the second locking part to lock the circumferential rotation of the pressure adjusting cap; pulling the pressure adjusting cap upward disengages the first locking part from the second locking part to allow the pressure adjusting cap to rotate circumferentially.

[0006] Furthermore, the first locking part is a toothed protrusion, and the second locking part is a locking rack.

[0007] Furthermore, the distal radial compression hemostat also includes a friction ring disposed between the pressure adjusting cap and the inner cap, the friction ring being used to provide positioning friction force after the pressure adjusting cap moves axially.

[0008] Furthermore, the outer periphery of the inner rotating cap is provided with an annular groove, the friction ring is installed in the annular groove, and the outer peripheral surface of the friction ring is in interference contact with the inner circumferential surface of the pressure regulating cap.

[0009] Furthermore, the compression structure includes an inner nut, a screw, and a compression body; the inner nut is rotatably disposed within the inner cavity of the inner cap; a slot is provided on the side of the inner nut facing the pressure adjusting cap; a connector adapted to the slot is provided on the inner top wall of the pressure adjusting cap, the end of the connector away from the pressure adjusting cap is inserted into the slot, and the pressure adjusting cap drives the inner nut to rotate through the connector and the slot; a gap is left between the end of the connector away from the pressure adjusting cap and the bottom of the slot. The screw is positioned such that the connector can move axially relative to the slot; one end of the screw is threaded into the inner nut; the fixing plate is provided with a limiting hole adapted to the radial cross-sectional shape of the screw, the end of the screw away from the inner nut is inserted into the limiting hole and extends out of the fixing plate, the limiting hole is used to restrict the screw from rotating relative to the fixing plate; the pressure body is connected to the end of the screw away from the inner nut, rotating the pressure adjusting cap drives the inner nut to rotate and drives the pressure body to rise and fall through the screw.

[0010] Furthermore, the distal radial compression hemostat also includes an indicator needle and a connecting post; the indicator needle is rotatably sleeved on the outside of the screw; the connecting post connects the inner nut and the indicator needle; a reference scale is provided on the fixed plate, and the indicator needle rotates synchronously with the rotation of the inner nut to indicate the reference scale provided on the fixed plate; and / or, a protruding pointer is provided on the side wall of the pressure adjusting cap for indicating pressure in conjunction with the reference scale provided on the fixed plate; and / or, an annular observation window is provided circumferentially on the inner cap for observing the reference scale provided on the fixed plate.

[0011] Furthermore, rotating the pressure adjusting cap one turn increases the pressure of the compression body on the puncture point by 10kPa-15kPa; and / or, when rotating the pressure adjusting cap, the descent speed of the compression body is not less than 5mm / s.

[0012] Furthermore, the distal radial compression hemostat also includes a spring, which is sleeved on the outer periphery of the screw; one end of the spring abuts against a first stepped surface located on the surface of the inner nut, and the other end abuts against a second stepped surface located in the inner cavity of the inner screw cap, for providing cushioning during compression adjustment.

[0013] Furthermore, the compression body is made of medical-grade silicone with a thickness of 2mm-3mm; and / or, the compression body is filled with medical liquid; and / or, the compression surface of the compression body is provided with anti-slip texture.

[0014] Furthermore, the fixation plate has a polygonal arc-shaped structure adapted to the distal radial part of the human body; and / or, the fixation plate is provided with a strap for fixing the hemostat to the patient's hand.

[0015] The technical solution of this invention has the following advantages: The distal radial compression hemostat provided by this invention features a first locking part at the bottom of the pressure regulating cap and a second locking part on the inner cap. Pressing the pressure regulating cap allows the two parts to precisely engage, forming a mechanical locking mechanism. This locking structure directly locks the circumferential rotational freedom of the pressure regulating cap, effectively counteracting vibrations and displacements caused by patient movements such as clenching their fists, flexing their wrists, and turning over. This fundamentally prevents pressure attenuation caused by unexpected loosening of the knob, ensuring stable and reliable compression pressure and significantly reducing the workload of medical staff in re-examining and readjusting the pressure.

[0016] The distal radial compression hemostat provided by this invention features a pressure adjusting cap designed to move axially relative to the inner cap. This allows pressure adjustment and locking to be achieved through different movement states of the same component: normal rotation adjusts the pressure, pressing locks it, and pulling unlocks and restores the pressure. Operation is simple and intuitive, requiring no auxiliary tools; a single person can independently complete the entire operation, effectively improving clinical hemostasis efficiency.

[0017] The distal radial compression hemostat provided by this invention maintains stable compression pressure through a locking structure, avoiding hemostasis failures such as puncture site bleeding and hematoma caused by pressure decay, reducing the risk of secondary intervention, and improving the safety and reliability of hemostasis after distal radial puncture.

[0018] The radial compression hemostat provided by this invention can achieve both the locking structure and the axial movement matching structure through the morphological matching between the pressure regulating cap and the inner cap, without the need to add independent locking parts. It has a compact structure, is easy to process and assemble, and is suitable for mass production and single-use scenarios. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the distal radial compression hemostat (disassembled state) provided in an embodiment of the present invention from one perspective; Figure 2 A schematic diagram of the distal radial compression hemostat (disassembled state) provided in an embodiment of the present invention from one perspective; Figure 3 This is a schematic diagram of the pressure regulating cap in the distal radial compression hemostat provided in an embodiment of the present invention from one perspective; Figure 4 This is a schematic diagram from another perspective of the pressure regulating cap in the distal radial compression hemostat provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of the inner rotating cap in the distal radial compression hemostat provided in an embodiment of the present invention, viewed from one angle. Figure 6 This is a schematic diagram from another perspective of the inner rotating cap in the distal radial compression hemostat provided in an embodiment of the present invention. Figure 7 This is a schematic diagram of the inner nut in the distal radial compression hemostat provided in an embodiment of the present invention; Figure 8 This is a schematic diagram showing the positional relationship between the inner rotating cap and the friction ring in the distal radial compression hemostat provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the compression body in the distal radial compression hemostat provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the indicator needle in the distal radial compression hemostat provided in an embodiment of the present invention; Figure 11 This is a schematic diagram showing the connection relationship between the indicator needle, connecting column, and inner nut in the distal radial compression hemostat provided in an embodiment of the present invention. Figure 12 This is a schematic diagram of the fixing plate in the distal radial compression hemostat provided in an embodiment of the present invention; Figure 13 This is a partial cross-sectional view of the distal radial compression hemostat provided in an embodiment of the present invention; Figure 14 This is a schematic diagram of the screw and limiting hole in the distal radial compression hemostat provided in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures: 1. Fixing plate; 101. Reference scale; 102. Limiting hole; 2. Strap; 3. Compression body; 4. Inner rotating cap; 401. Second locking part; 402. Annular groove; 403. Inner cavity; 4031. Second stepped surface; 404. Annular observation window; 405. Rotating part; 4051. Slot; 5. Inner nut; 501. First stepped surface; 502. Slot; 6. Pressure adjusting cap; 601. First locking part; 602. Protruding pointer; 603. Snap-fit ​​part; 604. Insertion part; 7. Screw; 8. Friction ring; 9. Indicator needle; 10. Connecting post; 11. Spring. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and defined, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] like Figures 1 to 13 As shown, this embodiment provides a distal radial compression hemostat. The hemostat is coaxially assembled along a vertical axis and includes, from top to bottom, a pressure adjusting cap 6, an inner cap 4, a fixing plate 1, and a compression body 3 located below the fixing plate 1.

[0027] The fixing plate 1, serving as the base of the entire hemostat, is located in the lower middle part of the hemostat. Made of medical-grade polycarbonate, it has a polygonal, arc-shaped plate structure that conforms to the anatomical contour of the distal radial region of the human body (nasal cavity or Hegu acupoint area), ensuring a good fit with the corresponding area of ​​the patient's hand during use. The inner screw cap 4 is fixedly installed above the fixing plate 1, with its inner cavity 403 extending vertically upwards and downwards. The inner nut 5 is rotatably disposed within the inner cavity 403. The screw 7 passes vertically through the central through-hole of the inner nut 5, with its upper end threaded into the inner thread of the inner nut 5 via its external thread. The lower end of the screw 7 passes downwards through the fixing plate 1 and connects to the compression body 3.

[0028] The pressure regulating cap 6 is a hollow, inverted cylindrical structure, fitted over the inner cap 4 from above. The two are connected by a snap-fit ​​structure (snap-fitting part 603 and slot 4051), allowing them to rotate relative to each other and move relative to each other axially. When the pressure regulating cap 6 is rotated, the screw 7 is driven to move up and down vertically, ultimately causing the compression body 3 to move up and down, thereby adjusting the pressure at the puncture point.

[0029] A locking structure is provided between the pressure regulating cap 6 and the inner cap 4. The bottom of the pressure regulating cap 6 has a first locking part 601, and the outer surface of the inner cap 4 has a second locking part 401. Pressing the pressure regulating cap 6 downwards engages the first locking part 601 with the second locking part 401, locking the circumferential rotation of the pressure regulating cap 6; pulling the pressure regulating cap 6 upwards disengages the two parts, releasing the circumferential rotational freedom.

[0030] The indicator needle 9 is rotatably sleeved on the outside of the screw 7, located in the space between the fixed plate 1 and the inner cap 4. It is connected to the inner nut 5 via the connecting post 10 and rotates synchronously with the inner nut 5 to indicate the reference scale 101 on the fixed plate 1. The spring 11 is sleeved on the outer circumference of the screw 7 and located in the inner cavity 403, providing cushioning during pressure adjustment. The friction ring 8 is disposed between the pressure adjusting cap 6 and the inner cap 4, providing positioning friction after the pressure adjusting cap 6 moves axially.

[0031] like Figure 12 As shown, the top surface of the fixing plate 1 is provided with a reference scale 101, located in the peripheral area of ​​the central mounting hole, which is used to cooperate with the indicator needle 9 and the raised pointer 602 to realize the quantitative reading of the compression pressure. The reference scale 101 is marked circumferentially according to the angle or the equivalent pressure value, so that medical staff can directly read the scale position corresponding to the current compression force during operation.

[0032] like Figure 12 As shown, the limiting hole 102 provided on the fixing plate 1 is specifically a constraint hole with a non-circular cross-section. In this embodiment, the limiting hole 102 is preferably set as an oblong hole (also called an elongated hole or a track-shaped hole) similar to a circular running track, and its hole wall contour is formed by two parallel straight line segments and two semi-circular arc segments respectively connecting the corresponding ends of the two straight line segments. The oblong hole is provided through the fixing plate 1 along the thickness direction (i.e., the vertical direction).

[0033] like Figure 14 As shown, correspondingly, the portion of the screw 7 that passes through the limiting hole is provided with an oblong-shaped fitting section that matches the shape of the oblong hole. Specifically, the radial cross-sectional outer contour of the screw 7 at this portion is not a complete circle, but rather an oblong cross-section formed by two parallel straight lines and two arc segments connecting the corresponding ends of the two straight lines. Its contour shape forms a clearance fit with the oblong inner contour of the limiting hole. As an alternative embodiment, this portion of the screw 7 may not be entirely set as an oblong cross-section, but rather two opposing chamfered planes are provided on the basis of the original circular screw, so that the outer contour of the cross-section at this portion also presents a shape composed of straight lines and arc segments that matches the oblong hole, as long as its widest point forms a stop fit with the straight line segment of the oblong hole in the circumferential direction.

[0034] In the assembled state, the straight section sidewall of the limiting hole and the straight outer circumferential surface (or chamfered plane) of the waist-shaped mating section of the screw 7 form a stop fit in the circumferential direction. Due to the presence of this stop fit, the limiting hole completely restricts the rotational freedom of the screw 7 relative to the fixing plate 1 around its own axis, preventing it from undergoing any circumferential rotation. At the same time, the limiting hole is a through hole structure in the axial direction, and its inner hole area (the area enclosed by the straight section and the semi-circular arc section) is larger than the cross-sectional area of ​​the corresponding mating section of the screw 7, so that the screw 7 is not constrained by the limiting hole in the axial direction (vertical direction) and can slide and rise freely along the axial direction without any jamming or interference.

[0035] Based on the above-mentioned motion constraint mechanism, when the inner nut 5 is driven to rotate by the pressure regulating cap 6, according to the principle of lead screw and nut motion, the screw 7 cannot rotate with the inner nut 5 because it is constrained by the waist-shaped limiting hole. Therefore, the screw 7 can only move linearly up and down along the axial direction (i.e., the vertical direction) of the limiting hole. The lifting and lowering of the screw 7 directly drives the pressure body 3 to lift and lower synchronously, thereby converting the rotational input of the pressure regulating cap 6 into the linear pressure output of the pressure body 3.

[0036] Preferably, the single-sided fitting clearance between the straight segment of the limiting hole and the corresponding straight segment of the screw 7 is 0.1mm to 0.3mm. This clearance range is selected based on the following: if the single-sided clearance is less than 0.1mm, the screw 7, during lifting and lowering, is prone to scraping or even jamming against the side wall of the straight segment of the limiting hole due to accumulated machining tolerances and assembly coaxiality errors, resulting in poor or no lifting and lowering of the compression body 3; if the single-sided clearance is greater than 0.3mm, the circumferential movement of the screw 7 within the limiting hole is too large, which, after accumulation, will cause the compression body 3 to undergo slight circumferential deflection or radial oscillation during lifting and lowering, preventing the bottom surface of the compression body 3 from always maintaining a parallel posture to the puncture point surface, causing the direction of the compression force to deviate and affecting the hemostatic effect. A clearance range of 0.1mm to 0.3mm ensures smooth lifting and lowering while effectively limiting the accumulated clearance of circumferential rotation, ensuring that the compression body 3 accurately lifts and lowers along the vertical axis, and that the direction of the compression force is always perpendicular to the puncture point surface, thus achieving a balance between the reliability of motion constraint and the smoothness of lifting and lowering.

[0037] In addition, the waist-shaped structure of the limiting hole ensures that the fixing plate 1 retains sufficient solid material thickness around the limiting hole (i.e., the straight section area on both sides of the hole wall has a large cross-sectional width), avoiding local stress concentration and strength weakening caused by setting other irregular holes (such as only opening a single keyway or pin hole), and ensuring the structural reliability of the fixing plate 1 under long-term use and repeated stress.

[0038] The bandage 2 is made of thermoplastic polyurethane elastomer material, and its two ends are fixedly connected to the opposite sides of the fixing plate 1. The bandage 2 is equipped with Velcro adjustment buckles. The effective length of the bandage 2 can be flexibly adjusted by the mutual adhesion of the hook and loop sides of the Velcro to adapt to the wrist circumference of different patients and ensure that the hemostat remains stable and does not slip off during long-term postoperative wear.

[0039] like Figure 9 As shown, the compression body 3 is connected to the bottom plane of the screw 7 and is made of medical-grade silicone material, with an overall flat disc-shaped structure. The thickness of the compression body 3 is 2mm to 3mm. This thickness range is selected based on the fact that the average soft tissue thickness from the skin surface to the bone surface in the distal radial region (snuffbox area) is approximately 4mm to 8mm, and the surface has an irregular curved shape. If the thickness of the compression body 3 is less than 2mm, the deformation of the silicone body is too small, making it difficult to fully conform to the irregular curved contour of the snuffbox area under pressure, easily forming local pressure gaps around the puncture point, resulting in uneven pressure. If the thickness is greater than 3mm, the axial compression deformation of the compression body 3 is too large. When rotating the pressure adjustment cap 6, part of the stroke is lost in the elastic deformation of the compression body 3 itself rather than being transmitted as effective pressure force, reducing the sensitivity of the pressure adjustment response and making the operator's feel unclear. Considering the anatomical characteristics of the distal radial region and the mechanical properties of silicone material, a thickness range of 2mm to 3mm can achieve a better balance between fit and force transmission efficiency.

[0040] In this embodiment, the compression body 3 has a sealed cavity filled with a medical fluid (such as saline or medical-grade silicone oil). Utilizing the physical property that liquids are incompressible and transmit pressure isotropically, when the compression body 3 is compressed, the internal fluid can evenly transmit pressure to the entire bottom surface of the compression body 3. This allows the compression body 3 to better adapt to the irregular surface contour of the distal radial region, ensuring uniform pressure distribution during high-pressure compression and avoiding skin injuries caused by localized pressure concentration. The compression surface of the compression body 3 is provided with anti-slip textures (such as concentric ring protrusions, radial protrusions, or grid-like protrusions). These anti-slip textures increase the friction between the compression surface of the compression body 3 and the patient's skin, preventing the compression body 3 from sliding relative to the puncture point due to the patient's hand movements under high-pressure compression, ensuring that the compression position is always accurately aligned.

[0041] like Figure 5 , Figure 6 As shown, the inner rotating cap 4 has a hollow cylindrical structure and is fixedly installed above the fixing plate 1, with a cylindrical inner cavity 403 formed inside. Figure 6 and Figure 13 As shown, the inner cavity 403 is provided with a second stepped surface 4031, which is used to abut against the upper end of the spring 11 to provide upper end support and positioning for the spring 11.

[0042] The top of the inner cap 4 is provided with a rotating part 405, which can rotate freely about a vertical axis relative to the main body of the inner cap 4. A groove 4051 extending vertically is provided on the outer wall of the rotating part 405 for engaging with a snap-fit ​​member 603 on the inner wall of the pressure regulating cap 6. The groove 4051 and the snap-fit ​​member 603 form a tight fit in the circumferential direction to transmit torque, while allowing the snap-fit ​​member 603 to slide a certain distance in the axial direction, thereby realizing a movement mode in which the pressure regulating cap 6 can both rotate and slide axially relative to the inner cap 4.

[0043] A second locking portion 401 is provided on the outer surface of the inner rotating cap 4. In this embodiment, the second locking portion 401 is a locking rack, that is, a plurality of toothed grooves evenly distributed circumferentially along the outer surface of the inner rotating cap 4. The locking rack is provided on the stepped surface of the inner rotating cap 4 near the bottom, and the cross-sectional shape of the toothed groove is adapted to the toothed protrusion of the first locking portion 601 to ensure that the two can form a stable meshing and locking fit.

[0044] like Figure 8 As shown, the outer periphery of the inner rotating cap 4 is also provided with an annular groove 402, which is located above the second locking part 401 and is used to install the friction ring 8. The axial width of the annular groove 402 is slightly larger than the axial thickness of the friction ring 8, so that the friction ring 8 has appropriate positioning space in the annular groove 402 without axial movement.

[0045] The bottom of the inner-rotation cap 4 is provided with an annular observation window 404. The annular observation window 404 is formed by a transparent annular skirt extending outward from the bottom edge of the inner-rotation cap 4, extending 360° around the circumference of the inner-rotation cap 4. Through the annular observation window 404, medical staff can observe the reference scale 101 on the fixation plate 1 and the position indicated by the pointer from any angle, and can fully grasp the compression pressure status without adjusting the body position, which greatly improves the convenience of clinical observation during postoperative monitoring.

[0046] like Figure 7 and Figure 13 As shown, the inner nut 5 is disposed in the inner cavity 403 of the inner screw cap 4, and has an annular sleeve structure. The outer circumferential surface of the inner nut 5 is clearance-fitted with the inner wall of the inner cavity 403, and can achieve free circumferential rotation through anti-friction washers or direct contact. The inner wall of the central through hole of the inner nut 5 is provided with internal threads, which form a threaded fit with the external threads of the screw 7. When the inner nut 5 is subjected to a circumferential driving force, the inner nut 5 rotates around its own axis in the inner cavity 403.

[0047] The bottom surface of the inner nut 5 is provided with a first stepped surface 501, which abuts against the lower end of the spring 11 to provide lower end support and positioning for the spring 11. The inner nut 5 is also provided with a mounting hole for fixing and installing the connecting post 10.

[0048] The inner nut 5 has a slot 502 on the side (i.e., the upper surface) facing the pressure regulating cap 6. The slot 502 is used to form a mating engagement with the connector 604 on the inner top wall of the pressure regulating cap 6 to transmit rotational torque. The specific shape of the slot 502 is adapted to the cross-sectional shape of the connector 604, which will be described in detail below.

[0049] like Figure 3 , Figure 4 As shown, the pressure regulating cap 6 is a hollow, inverted cylindrical structure, fitted over the inner cap 4 from above, allowing it to rotate around and slide along its axis relative to the inner cap 4. A snap-fit ​​element 603 is provided on the inner wall of the pressure regulating cap 6. In this embodiment, the snap-fit ​​element 603 is a T-shaped protrusion that engages with the slot 4051 on the rotating part 405 at the top of the inner cap 4, achieving circumferential torque transmission and axial sliding guidance. The axial sliding distance of the snap-fit ​​element 603 within the slot 4051 is the pressing / lifting stroke of the pressure regulating cap 6 relative to the inner cap 4, and this stroke is limited by the axial length of the slot 4051.

[0050] The bottom of the pressure regulating cap 6 is provided with a first locking part 601. In this embodiment, the first locking part 601 is a toothed protrusion, that is, a plurality of protruding teeth evenly distributed circumferentially along the bottom surface of the pressure regulating cap 6. The tips of the toothed protrusions face the second locking part 401 (locking rack) of the inner cap 4, and the two are arranged opposite each other in the axial direction. The toothed cross section of the toothed protrusion is adapted to the tooth groove cross section of the locking rack to ensure that the two can form a stable engagement when pressed. The number of toothed protrusions and the number of tooth grooves of the locking rack can be the same, or different numbers can be used to achieve multi-angle locking. For example, when there are 6 toothed protrusions and 36 tooth grooves, fine locking with a locking point every 10° can be achieved.

[0051] The pressure adjusting cap 6 also has a raised pointer 602 on its side wall, which protrudes radially outward from the side wall and points to the reference scale 101 on the fixed plate 1, used to indicate the pressure in conjunction with the reference scale 101. The raised pointer 602 moves circumferentially as the pressure adjusting cap 6 rotates, and the scale value it points to directly reflects the magnitude of the pressure. The outer side wall of the pressure adjusting cap 6 may also have anti-slip textures (such as vertical knurling or diamond mesh) to facilitate the grip and rotation of the cap by medical personnel, preventing operational errors caused by slippage during adjustment.

[0052] A connector 604 protrudes downward from the center of the inner top wall of the pressure regulating cap 6. The connector 604 is a torque transmission component between the pressure regulating cap 6 and the inner nut 5. In this embodiment, the connector 604 may have a cylindrical body. A plurality of arc-shaped inserts may be spaced circumferentially along the end face of the cylindrical body facing the inner nut. A plurality of slots 502 adapted to the inserts may be circumferentially arranged on the upper surface of the inner nut 5. The inserts are inserted into the slots 502, and the side of the insert abuts against the inner sidewall of the slot 502 in a circumferential relationship. When the pressure regulating cap 6 rotates, the connector 604 rotates synchronously with it, transmitting the rotational torque to the inner nut 5 and driving the inner nut 5 to rotate synchronously.

[0053] Specifically, an axial gap is always maintained between the insert at the lower end of the connector 604 and the bottom plane of the slot 502. This axial gap is greater than the pressing / pulling stroke of the pressure adjusting cap 6. The design intent is that when the user presses down or pulls up the pressure adjusting cap 6 to lock or unlock, the insert can slide freely axially within the slot 502 without ever touching the bottom of the slot 502. Therefore, the pressing / pulling operation is only used to control the engagement and disengagement of the locking structure, and will not transmit axial force to the inner nut 5 and the screw 7. This avoids the pressure body 3 from being accidentally pressed down or lifted up due to the locking action itself, ensuring that the pressure adjustment and locking actions do not interfere with each other, achieving high-precision operation of immediate adjustment and locking without disturbing the pressure.

[0054] The locking structure consists of a first locking part 601 (toothed protrusion) at the bottom of the pressure adjusting cap 6 and a second locking part 401 (locking rack) on the outer surface of the inner cap 4. Its working principle is as follows: Under normal pressure adjustment conditions, the pressure adjusting cap 6 is in the upper position (lifted state). The first locking part 601 and the second locking part 401 are axially separated and do not contact each other. The pressure adjusting cap 6 can rotate freely to adjust the pressure. When the pressure is adjusted to the target value by rotating the pressure adjusting cap 6, pressing down on the pressure adjusting cap 6 causes it to slide downwards axially. The toothed protrusion of the first locking part 601 gradually approaches and engages with the toothed groove of the locking rack of the second locking part 401, forming a circumferential engagement. Since the inner rotating cap 4 is fixedly installed on the fixed plate 1, its circumferential rotational freedom is completely restricted. Therefore, when the first locking part 601 engages with the second locking part 401, the circumferential rotation of the pressure regulating cap 6 is correspondingly locked and cannot continue to rotate. After the circumferential rotation of the pressure regulating cap 6 is locked, the connector 604 is locked accordingly, the rotation of the inner nut 5 is restricted, the axial position of the screw 7 and the height position of the pressing body 3 are correspondingly fixed, and the pressure is stably maintained.

[0055] When pressure adjustment is required again, pull the pressure adjusting cap 6 upwards. The toothed protrusion will axially disengage from the tooth groove, and the first locking part 601 will disengage from the second locking part 401. The circumferential rotational freedom of the pressure adjusting cap 6 will be released, and the pressure can be adjusted again by rotation.

[0056] The anti-loosening mechanism of this locking structure is as follows: when the first locking part 601 and the second locking part 401 are engaged, the inner rotating cap 4 is fixed on the fixed plate 1, and its circumferential degree of freedom is zero. The pressure adjusting cap 6 forms a circumferential fixed connection with the inner rotating cap 4 through the engagement between the toothed protrusion and the tooth groove of the locking rack, rather than relying on the frictional resistance of the threaded pair to maintain its position. Under the vibration excitation generated by the patient's postoperative hand activities (such as clenching fist, flexing wrist, turning over, etc.), the pressure adjusting cap 6 is subjected to a circumferential alternating torque; since the contact direction between the driving surface of the toothed protrusion and the force-bearing surface of the tooth groove in the engaged state is perpendicular to the circumferential rotation direction of the pressure adjusting cap 6 (i.e., the normal direction of the tooth surface is radial, while the rotation direction is tangential), this alternating torque only generates normal compressive stress on the tooth surface and will not be converted into a tangential component force that causes the pressure adjusting cap 6 to rotate circumferentially. Therefore, without axial lifting force, the locking structure has no driving force for circumferential slippage in statics, thus eliminating the mechanical path of unexpected knob release from a structural principle perspective. Based on the above mechanism, even if the patient's hand vibration continues under high pressure, the axial position of the compression body 3 can be stably locked for a long time, and the compression pressure does not decrease significantly.

[0057] like Figure 8 and Figure 13 As shown, the friction ring 8 can be made of medical-grade silicone material, and is ring-shaped, installed in the annular groove 402 on the outer circumference of the inner cap 4. An interference contact is formed between the outer circumferential surface of the friction ring 8 and the inner circumferential surface of the pressure adjusting cap 6, meaning that the outer diameter of the friction ring 8 in its free state is slightly larger than the inner diameter of the pressure adjusting cap 6 at that position. After installation, the friction ring 8 is radially compressed, resulting in elastic deformation, generating contact pressure and static friction between the outer circumferential surface of the friction ring 8 and the inner circumferential surface of the pressure adjusting cap 6.

[0058] The function of this static friction is to maintain the pressure adjusting cap 6 in its current axial position after axial movement, preventing unexpected axial movement due to gravity or slight vibration. Specifically, after the pressure adjusting cap 6 is pulled upward to the unlocked position, the static friction provided by the friction ring 8 is sufficient to overcome the weight of the pressure adjusting cap 6 itself, keeping it in the unlocked position and preventing accidental locking due to automatic falling. After being pressed downward to the locked position, the friction ring 8 assists in maintaining the locked state, enhancing the reliability of the locking. The design of the friction ring 8 provides a clear sense of the pressing / pulling operation and a position holding function, improving the operating feel and ease of use.

[0059] like Figure 13As shown, the spring 11 is sleeved on the outer periphery of the screw 7 and located in the inner cavity 403 of the inner screw cap 4. It is a helical compression spring 11. The upper end of the spring 11 abuts against the second step surface 4031 in the inner cavity 403 of the inner screw cap 4, and the lower end abuts against the first step surface 501 on the surface of the inner nut 5.

[0060] In its initial uncompressed state, spring 11 is at its natural length or slightly pre-compressed, allowing the inner nut 5 a certain amount of axial float. The main function of spring 11 is to provide cushioning during pressure adjustment. When medical personnel quickly rotate the pressure adjusting cap 6 to apply pressure, the inner nut 5 rotates rapidly and drives the screw 7 downwards via its thread. The moment the pressure body 3 contacts and compresses the puncture site tissue, a reaction force is generated. This reaction force is transmitted to the inner nut 5 through the screw 7. Due to the gap between the threaded mating surfaces, this impact force may cause the inner nut 5 to momentarily move axially. During this process, spring 11 absorbs some of the impact energy through its elastic deformation, suppressing the axial movement of the inner nut 5. The pressure build-up process is smoother and gentler, avoiding impact damage to the puncture site tissue caused by sudden pressure changes. Simultaneously, spring 11 continuously applies an axial bias force to the inner nut 5 during rotation adjustment, ensuring that the threads of the inner nut 5 and the screw 7 remain axially engaged, reducing the axial gap between the threaded pairs and improving the accuracy and responsiveness of pressure adjustment.

[0061] like Figure 10 , Figure 11 As shown, the indicator needle 9 is rotatably sleeved on the outside of the screw 7, located in the space between the fixed plate 1 and the inner screw cap 4. The indicator needle 9 is thin and has a through hole in the center. The diameter of the through hole is larger than the outer diameter of the screw 7, so that the indicator needle 9 does not interfere with the screw 7 when rotating.

[0062] The connecting post 10 is a slender columnar component, with one end connected to the mounting hole on the inner nut 5 and the other end connected to the mounting hole on the indicator needle 9, thus connecting the inner nut 5 and the indicator needle 9 as a single unit. When the inner nut 5 rotates in the inner cavity 403, the connecting post 10 moves synchronously with the inner nut 5, causing the indicator needle 9 to rotate synchronously around the axis of the screw 7. The free end of the indicator needle 9 points to the reference scale 101 on the fixed plate 1, and moves between different scale lines as the inner nut 5 rotates, indicating the current pressure value.

[0063] At the same time, the protruding pointer 602 on the side wall of the pressure regulating cap 6 protrudes radially outward from the side wall, pointing to the reference scale 101 on the fixed plate 1, reflecting the degree of rotation of the pressure regulating cap 6 and the current pressure from another angle.

[0064] The indicator needle 9 and the raised pointer 602 work together to form a dual pressure indication system. The indicator needle 9 is directly driven by the inner nut 5, reflecting the relative threaded engagement position between the screw 7 and the inner nut 5, providing real displacement feedback at the end of the transmission chain. The raised pointer 602 rotates synchronously with the pressure adjusting cap 6, reflecting the rotation angle of the operating input. The two systems corroborate each other; if their readings match, it indicates that there are no abnormal gaps or slippages in the various mating parts of the transmission chain; if they do not match, it prompts the operator to check for any abnormalities in the fit. This dual indication system achieves both precise quantitative pressure adjustment and self-verification of transmission reliability.

[0065] In addition, the annular observation window 404 at the bottom of the inner cap 4 covers a 360° circumferential view, allowing medical staff to observe the reference scale 101 and the bleeding at the puncture point from any angle without adjusting their position, thus improving the convenience of clinical monitoring.

[0066] In this embodiment, rotating the pressure adjustment cap 6 one turn increases the pressure of the compression body 3 at the puncture point by 10 kPa to 15 kPa. The selection of this increment range is based on the fact that the pressure required for hemostasis after routine distal radial artery puncture is generally 20 kPa to 30 kPa. If the pressure increment per turn is less than 10 kPa, it would require more than 3 turns to rise from the initial zero pressure state to the standard hemostatic pressure. This would be too time-consuming during the removal of the arterial sheath, hindering seamless transition between sheath removal and pressure application, and potentially increasing bleeding. If the pressure increment per turn is greater than 15 kPa, the pressure change corresponding to each small angle rotation would be too large when fine-tuning near the target pressure, easily exceeding the target pressure value and requiring reverse adjustment, increasing the risk of pressure fluctuations and tissue damage. Therefore, a single-turn increment of 10 kPa to 15 kPa balances the dual needs of rapid pressure application and fine-tuning, allowing the operator to quickly establish effective hemostatic pressure after sheath removal while achieving precise positioning near the target value.

[0067] When rotating the pressure regulating cap 6, the descent speed of the compression body 3 should be no less than 5 mm / s. This speed parameter is determined by the lead of the screw 7 and the rotation speed of the inner nut 5 operated by the operator. In this embodiment, the lead of the screw 7 is set to 2 mm to 3 mm, and with a single turn of the inner nut 5, the compression body 3 descends linearly by 2 mm to 3 mm. At the moment of removing the arterial sheath, the compression body 3 needs to quickly contact the puncture point to seal the vascular rupture. If the descent speed of the compression body 3 is less than 5 mm / s, the time interval from sheath removal to complete compression will be too long (generally more than 2 seconds). During this period, the puncture point will be uncompressed, which may lead to moderate to large amounts of bleeding. Moreover, the distal radial artery has a small diameter and relatively low pressure, and delayed compression can easily form a hematoma gap between the vessel wall and surrounding tissues, increasing the difficulty of subsequent hemostasis. In this embodiment, by setting the lead of the screw 7 to 2 mm to 3 mm and coordinating with rapid rotation, a descent speed of no less than 5 mm / s can be achieved, ensuring seamless connection between sheath removal and compression.

[0068] Preoperative preparation stage: After the distal radial artery interventional procedure and before the arterial sheath is removed, the compression body 3 is attached to the distal radial part of the patient (nasal cavity area or Hegu acupoint area). The position is adjusted so that the center of the compression body 3 is aligned with the puncture point. The Velcro adjustment buckle on the strap 2 is used for initial fixation to ensure that the hemostat will not shift during subsequent operations.

[0069] Rapid pressurization phase: At the instant the arterial sheath is removed, the pressure regulating cap 6 is rapidly rotated clockwise. Based on the above parameters, one rotation can increase the pressure by 10 kPa to 15 kPa. The compression body 3 descends rapidly at a speed of not less than 5 mm / s, achieving a seamless connection between sheath removal and pressurization, and sealing the vascular rupture in the shortest possible time.

[0070] Precise pressure adjustment phase: By using the relative position of the raised pointer 602 and / or the indicator needle 9 with the reference scale 101, the compression pressure is quantitatively adjusted to the target value based on the patient's condition. The routine hemostatic pressure is 20 kPa to 30 kPa, and for patients with high bleeding risk (such as the elderly, those with abnormal coagulation function, or those who have used a large amount of heparin during surgery), it can be adjusted to 30 kPa to 50 kPa. During the adjustment process, the pressure value can be read from any angle through the annular observation window 404, without the need to tilt the hemostat as a whole or adjust the patient's hand posture.

[0071] High-pressure locking phase: After the pressure is adjusted to the correct position, press down on the pressure adjusting cap 6 to engage and lock the first locking part 601 with the second locking part 401. After locking, the pressure adjusting cap 6 cannot rotate circumferentially, the axial position of the screw 7 and the compression body 3 is fixed, and the pressure is maintained stably without unexpected attenuation due to the patient's hand movements.

[0072] Postoperative monitoring and pressure adjustment: Within 1 to 2 hours post-procedure, monitor the puncture site in real time through the circular observation window 404 for any abnormalities such as bleeding, swelling, or subcutaneous hematoma. If pressure adjustment is required (e.g., slightly increase pressure if there is minor bleeding at the puncture site, or appropriately reduce pressure if the patient complains of pain), pull up the pressure adjustment cap 6 to disengage the lock, rotate to adjust the pressure to the new target value, and then press the lock again. The entire pressure adjustment, locking, and unlocking process can be completed by the same component (pressure adjustment cap 6) through different axial operation states, without the need for any auxiliary tools; a single person can complete the entire operation independently.

[0073] In other embodiments, the specific engagement of the first locking part 601 and the second locking part 401 is not limited to the meshing method of the toothed protrusion and the locking rack described above. Any structural form that can achieve circumferential locking by pressing and release circumferential locking by lifting can be used as an alternative embodiment of the present invention.

[0074] As an alternative implementation, the first locking part 601 is an annular wave surface (i.e., an annular curved surface with alternating peaks and troughs along the circumference) located at the bottom of the pressure regulating cap 6, and the second locking part 401 is an elastic claw assembly located on the outer surface of the inner cap 4. The elastic claw assembly includes multiple elastic claws distributed along the circumference, and the end of each claw has an arc-shaped protrusion adapted to the wave surface. When the pressure regulating cap 6 is pressed, the trough of the wave surface engages with the arc-shaped protrusion at the end of the claw, forming a circumferential limiting lock; when pulled up, the trough disengages from the claw, restoring rotational freedom.

[0075] As an alternative implementation, an independent axial sliding locking ring is provided between the pressure regulating cap 6 and the inner cap 4. This locking ring is sleeved on the outer periphery of the inner cap 4 and can slide axially. The locking ring and the inner cap 4 are engaged by a beveled self-locking structure (i.e., the inner wall of the locking ring has a first wedge-shaped bevel, and the corresponding position on the outer wall of the inner cap 4 has a second wedge-shaped bevel). When the pressure regulating cap 6 is pressed, the pressure regulating cap 6 pushes the locking ring downward, and the two wedge-shaped bevels press against each other to produce a wedge-locking effect, which restricts the circumferential rotation of the pressure regulating cap 6 through the beveled self-locking; when pulled up, the locking ring moves upward, the wedge-shaped bevels separate, and the self-locking effect is released.

[0076] All the above alternative embodiments share the common operating logic of pressing to lock and pulling to unlock, and none of them require the addition of a separate locking component; the locking function can be achieved through the morphological cooperation between existing components. Any changes in the specific structural form do not depart from the protection scope of this invention.

[0077] In some other embodiments, the interior of the compression body 3 may not be filled with medical liquid, but may be made of solid medical silicone to simplify the manufacturing process, reduce costs, and make it suitable for use scenarios where fit is not critical.

[0078] In some other embodiments, the linkage between the indicator needle 9 and the inner nut 5 can be achieved without the connecting post 10, for example, by gear meshing or synchronous belt drive to achieve synchronous rotation.

[0079] In other embodiments, the annular observation window 404 may also be composed of multiple independent observation holes distributed circumferentially at the bottom of the inner rotating cap 4, rather than a continuous annular transparent skirt, in order to reduce the difficulty of processing.

[0080] In some other embodiments, the spring 11 can be omitted. In this case, the axial floating of the inner nut 5 is naturally provided by the threaded fit clearance. The pressure adjustment function of the hemostat can still be realized, but the buffering effect is correspondingly weakened.

[0081] The distal radial compression hemostat of this embodiment uses pressure to precisely engage the first locking part 601 and the second locking part 401 to form a mechanical locking mechanism, directly locking the circumferential rotational freedom of the pressure regulating cap 6. This locking method does not rely on the frictional resistance of the threaded pair, fundamentally preventing unexpected loosening of the knob and pressure attenuation caused by the patient's hand movements. The compression pressure is stable and reliable, significantly reducing the workload of medical staff in re-pressurizing during postoperative checkups.

[0082] This embodiment utilizes the axial movement design of the pressure regulating cap 6 to enable pressure adjustment, locking, and unlocking functions to be completed through three different axial positions of the same component: normal rotation adjusts pressure, pressing down locks the cap, and lifting up unlocks the cap and restores pressure adjustment. The operation is simple and intuitive, requiring no auxiliary tools, and can be completed independently by a single person, effectively improving clinical hemostasis efficiency.

[0083] This embodiment uses a locking structure to maintain stable pressure, avoiding hemostasis failures such as bleeding and hematoma at the puncture site due to pressure decay, reducing the risk of secondary intervention, and improving the safety and reliability of hemostasis after distal radial puncture.

[0084] In this embodiment, both the locking structure and the axial movement fit structure can be achieved through the morphological fit between the pressure regulating cap 6 and the inner cap 4, without the need to add independent locking parts. The structure is compact, easy to process and assemble, and suitable for mass production and disposable use scenarios.

[0085] In this embodiment, the compression body 3 is made of thickened medical silicone and filled with liquid to ensure uniform pressure distribution during high-pressure compression and avoid skin injury caused by local pressure concentration; the anti-slip texture prevents sliding and displacement under high pressure and ensures accurate compression position.

[0086] In this embodiment, the cooperation between the indicator needle 9 and the reference scale 101, and the cooperation between the raised pointer 602 and the reference scale 101, form a dual pressure indication system, realizing the dual functions of precise quantitative adjustment of pressure and self-verification of transmission reliability.

[0087] In this embodiment, the annular observation window 404 covers a 360° circumferential view, allowing medical staff to observe the reference scale 101 and the bleeding at the puncture point from any angle without adjusting their position, thus improving the convenience of clinical monitoring.

[0088] In summary, this invention provides a radial compression hemostat that is compact, easy to operate, and has stable and reliable pressure. It effectively solves the technical problems of poor stability, easy pressure release, and inconvenience of use under high pressure in the prior art, and has good prospects for clinical application.

[0089] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to cover all possible implementations. Those skilled in the art will recognize that various variations and modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations and modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A distal radial compression hemostat, characterized in that, include: Fixing plate (1); A compression structure is provided on the fixed plate (1) for compressing the distal radial puncture point; An inner rotating cap (4) is installed on the fixing plate (1); The pressure adjusting cap (6) is rotatably and axially movable on the outside of the inner cap (4); the pressure adjusting cap (6) is connected to the pressure structure, and rotating the pressure adjusting cap (6) drives the pressure structure to rise and fall to adjust the pressure force; The locking structure includes a first locking part (601) disposed at the bottom of the pressure regulating cap (6) and a second locking part (401) disposed on the outer surface of the inner cap (4); pressing the pressure regulating cap (6) can engage the first locking part (601) with the second locking part (401) to lock the circumferential rotation of the pressure regulating cap (6); pulling the pressure regulating cap (6) upward can disengage the first locking part (601) from the second locking part (401) to allow the pressure regulating cap (6) to rotate circumferentially.

2. The distal radial compression hemostat according to claim 1, characterized in that, The first locking part (601) is a toothed protrusion, and the second locking part (401) is a locking rack.

3. The distal radial compression hemostat according to claim 2, characterized in that, It also includes a friction ring (8) disposed between the pressure regulating cap (6) and the inner cap (4), the friction ring (8) being used to provide positioning friction after the pressure regulating cap (6) moves axially.

4. The distal radial compression hemostat according to claim 3, characterized in that, The outer periphery of the inner rotating cap (4) is provided with an annular groove (402), the friction ring (8) is installed in the annular groove (402), and the outer peripheral surface of the friction ring (8) is in interference contact with the inner circumferential surface of the pressure regulating cap (6).

5. The distal radial compression hemostat according to claim 1, characterized in that, The compression structure includes an inner nut (5), a screw (7), and a compression body (3); The inner nut (5) is rotatably disposed in the inner cavity (403) of the inner cap (4); the inner nut (5) is provided with a slot (502) on the side facing the pressure regulating cap (6); The inner top wall of the pressure adjusting cap (6) is provided with a connector (604) adapted to the slot (502). The end of the connector (604) away from the pressure adjusting cap (6) is inserted into the slot (502). The pressure adjusting cap (6) drives the inner nut (5) to rotate through the connector (604) and the slot (502). There is a gap between the end of the connector (604) away from the pressure adjusting cap (6) and the bottom of the slot (502) so that the connector (604) can move in the axial direction relative to the slot (502). One end of the screw (7) is threaded into the inner nut (5); The fixing plate (1) is provided with a limiting hole (102) that is adapted to the radial cross-sectional shape of the screw (7). The end of the screw (7) away from the inner nut (5) is inserted into the limiting hole (102) and extends out of the fixing plate (1). The limiting hole (102) is used to restrict the screw (7) from rotating relative to the fixing plate (1). The pressure body (3) is connected to the end of the screw (7) away from the inner nut (5). When the pressure adjusting cap (6) is rotated, the inner nut (5) is driven to rotate and the pressure body (3) is driven to rise and fall through the screw (7).

6. The distal radial compression hemostat according to claim 5, characterized in that, It also includes an indicator needle (9) and a connecting post (10); The indicator needle (9) is rotatably sleeved on the outside of the screw (7); The connecting post (10) connects the inner nut (5) to the indicator pin (9); The fixed plate (1) is provided with a reference scale (101), and the indicator needle (9) rotates synchronously with the rotation of the inner nut (5) to indicate the reference scale (101) provided on the fixed plate (1). And / or, the pressure regulating cap (6) is provided with a protruding pointer (602) on its side wall, which is used to cooperate with the reference scale (101) provided on the fixed plate (1) to indicate the pressure; And / or, the inner rotating cap (4) is provided with an annular observation window (404) in the circumferential direction for observing the reference scale (101) set on the fixing plate (1).

7. The distal radial compression hemostat according to claim 5, characterized in that, Rotate the pressure regulating cap (6) one turn, and the compression body (3) will increase the pressure on the puncture point by 10 kPa-15 kPa; And / or, when the pressure regulating cap (6) is rotated, the descent speed of the pressure body (3) is not less than 5 mm / s.

8. The distal radial compression hemostat according to claim 5, characterized in that, It also includes a spring (11), which is sleeved on the outer periphery of the screw (7); One end of the spring (11) abuts against the first stepped surface (501) on the surface of the inner nut (5), and the other end abuts against the second stepped surface (4031) in the inner cavity (403) of the inner screw cap (4), for providing cushioning during pressure adjustment.

9. The distal radial compression hemostat according to claim 5, characterized in that, The compression body (3) is made of medical silicone with a thickness of 2mm-3mm; And / or, the compression body (3) is filled with medical fluid; And / or, the pressing surface of the pressing body (3) is provided with anti-slip texture.

10. The distal radial compression hemostat according to claim 1, characterized in that, The fixing plate (1) has a polygonal arc-shaped structure that is adapted to the distal radial part of the human body; And / or, the fixing plate (1) is provided with a strap (2) for fixing the hemostat to the patient's hand.

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