A chitosan-loaded knob-type radial artery compression hemostat
By incorporating chitosan hemostatic powder and a protective sleeve design into the knob-type radial artery compression hemostat, the problems of compression point displacement and prolonged compression of the hemostat are solved, achieving rapid and effective hemostasis and reducing patient pain and complications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 郭鹏
- Filing Date
- 2025-03-31
- Publication Date
- 2026-07-21
AI Technical Summary
Existing knob-type radial artery hemostats are prone to displacement of the compression point due to patient movement during use. Prolonged compression may cause poor venous return, swelling, and radial artery occlusion. Furthermore, existing hemostasis methods are not rapid or effective enough.
A chitosan-loaded knob-type radial artery compression hemostat is used. Chitosan hemostatic powder is placed in the drug-loaded hole on the compression pad. The compression force is adjusted by the knob. The accuracy and stability of the compression point are ensured by the protective sleeve and the pulling component. The chitosan hemostatic powder reacts with the blood to form a blood clot to accelerate hemostasis.
It improves hemostasis, shortens hemostasis time, reduces patient discomfort and the risk of complications, and avoids poor venous return and radial artery occlusion caused by prolonged compression.
Smart Images
Figure CN224523166U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of hemostatic devices, and in particular relates to a chitosan-loaded knob-type radial artery compression hemostatic device. Background Technology
[0002] The radial artery has become the default access site for coronary angiography and interventional procedures. Both European and American guidelines endorse the "radial artery priority" strategy (Recommendation Category I, Evidence Level A). Compared to the femoral artery, using the radial artery reduces the risk of mortality, major adverse cardiovascular events, site-related major bleeding, and vascular complications. A radial artery hemostat, a common medical device, is used to control radial artery bleeding during procedures. The radial artery hemostat works by applying pressure to the artery to control blood flow. During the procedure, the surgeon makes a puncture at the patient's wrist, inserts a catheter into the radial artery, and then secures the hemostatic device of the radial artery hemostat at the puncture site. The surgeon can then gently withdraw the catheter, at which point the hemostatic device of the radial artery hemostat applies appropriate pressure to the puncture site, thereby controlling bleeding.
[0003] Existing knob-type radial artery hemostats achieve self-fixation through tying. However, the tying structure is not stable, and if the patient moves, the hemostat can easily shift, leading to displacement of the compression point, failure of hemostasis, and massive bleeding. In addition, existing knob-type radial artery hemostats apply pressure for at least six hours, and prolonged pressure can easily cause swelling due to poor venous return, pressure blisters, or even radial artery occlusion, increasing patient suffering. Utility Model Content
[0004] The purpose of this invention is to provide a chitosan-based knob-type radial artery compression hemostat that improves hemostasis at the puncture site and shortens hemostasis time.
[0005] The chitosan-loaded knob-type radial artery compression hemostat includes a compression device body. A compression pad is fixed to the bottom of the moving screw of the compression device body. A drug-loading hole is opened at the bottom of the compression pad, and chitosan hemostatic powder is placed in the drug-loading hole. A protective sleeve with front and rear communication is independently fitted on the compression pad. An opening communicating with the rear side wall is opened at the top of the protective sleeve for the moving screw to pass through. A pulling component is provided on the protective sleeve to facilitate medical personnel to pull it out of the compression pad.
[0006] Furthermore, the bottom of the protective sleeve is provided with a positioning groove aligned with the chitosan hemostatic powder, and the bottom of the protective sleeve is provided with a guide groove that connects the positioning groove with the front side wall.
[0007] Furthermore, the guide groove is inclined in a way that is higher at the front and lower at the back.
[0008] Furthermore, the pulling assembly includes a buckle plate with a perforation for finger insertion, one end of which is hinged to the front end of the protective sleeve; when the buckle plate swings to the bottom of the protective sleeve and aligns with it, a locking assembly is provided between the swinging end of the buckle plate and the protective sleeve to lock the buckle plate after swinging.
[0009] Furthermore, the locking assembly includes a side plate with an "L"-shaped structure. The vertical section of the side plate is fixed to the swing end of the buckle plate, and the horizontal section of the side plate faces away from the buckle plate. A locking block for pressing down the protective sleeve is fixed on the vertical section of the side plate.
[0010] Furthermore, a sponge sheet is provided between the bottom of the movable screw and the chitosan hemostatic powder.
[0011] Furthermore, two connecting rings are fixed on the hinge end of the buckle plate and are arranged in parallel left and right. Pivots are horizontally fixed on the front ends of the left and right side walls of the protective sleeve, and the two connecting rings are independently fitted onto the two pivots.
[0012] Compared with the prior art, the present invention has the following beneficial effects: Rotate the adjusting cap to move the moving screw downwards. After the pressure pad contacts the radial artery puncture site, it applies pressure to stop bleeding. At the same time, after the protective sleeve is removed, the chitosan hemostatic powder in the drug-loaded orifice quickly combines with the blood at the puncture site to form a blood clot. This externally formed blood clot provides acute exogenous pressure to the puncture site and shortens the time for radial artery hemostasis. Since it does not enter the bloodstream, it will not cause other side effects to the patient. Using both hemostasis methods simultaneously can effectively improve the hemostatic effect. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view of the protective sleeve in this utility model; Figure 3 for Figure 2 Sectional view at point AA; Figure 4 This is a top view of the protective sleeve in this utility model; Figure 5 This is a bottom view of the protective sleeve in this utility model; Figure 6 This is a top view of the buckle plate in this utility model; Figure 7 for Figure 6 Sectional view at point BB; Figure 8 This is an exploded view of the present invention; The components in the diagram are named as follows: 1. Support plate; 2. Adjusting cover; 3. Moving screw; 4. Adjusting nut; 5. Spring; 6. Compression pad; 7. Chitosan hemostatic powder; 8. Buckle plate; 9. Protective sleeve; 10. Sponge sheet; 11. Guide groove; 12. Opening; 13. Positioning groove; 14. Connecting ring; 15. Side plate; 16. Locking block. Detailed Implementation
[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. Example
[0015] This embodiment describes a chitosan-based knob-type radial artery compression hemostat, such as... Figure 1 , Figure 2 and Figure 8 As shown, the device includes a compression device body, which is an existing knob-type radial artery compression hemostat. It mainly consists of a support plate 1, an adjusting cover 2, an adjusting nut 4, a spring 5, a guide groove 11, a moving screw 3, a fixing strap (Hook and Loop), a T-shaped pressure block, and other structures. In use, the hemostat is fixed to the arm at the puncture site by the fixing strap. The adjusting cover 2 is rotated, which causes the adjusting nut 4 to rotate, thereby adjusting the moving screw 3 to move up and down. The compression pad 6 at the bottom of the moving screw 3 applies pressure to the puncture site to stop bleeding. The bottom of the moving screw 3 of the compression device body is fixed with a compression pad 6, such as Figure 1 and Figure 8 As shown, the compression pad 6 is disc-shaped and made of medical-grade silicone, medical-grade latex, and other materials. The compression pad 6 has good elasticity and can deform according to the shape of the compression area, allowing the compression pad 6 to better fit the skin of the puncture point. When the moving screw 3 moves down, the compression pad 6 contacts the radial artery puncture area and applies pressure to stop bleeding. The relatively soft material of the compression pad 6 can make the puncture area more comfortable. The bottom of the compression pad 6 has a drug-loading hole, such as... Figure 1 and Figure 8 As shown, the drug-loaded hole is located at the center of the bottom of the compression pad 6. Chitosan hemostatic powder 7 is placed in the drug-loaded hole. A sponge sheet 10 is placed between the bottom of the moving screw 3 and the chitosan hemostatic powder 7. Chitosan has good biocompatibility and can be biodegraded. The degradation products are non-toxic and have antibacterial, hemostatic, and wound-healing effects. When this chitosan fiber is used at the radial artery puncture site, it significantly shortens the radial artery hemostasis time. Most of the time, the hemostasis can be stopped and the compression device can be released in a very short time, which reduces patient discomfort and prevents short-term radial artery occlusion. The compression pad 6 is independently fitted with a protective sleeve 9 that connects front and back, such as... Figure 2 and Figure 3 As shown, the protective sleeve 9 is a rectangular sleeve with open front and back. It is fitted onto the compression pad 6 and can be used to protect the compression pad 6. The compression pad 6 is attached to the inner bottom of the protective sleeve 9, which can prevent the chitosan hemostatic powder 7 in the drug loading hole from falling out. The protective sleeve 9 can also protect the compression pad 6 and the chitosan hemostatic powder 7, preventing the compression pad 6 and the chitosan hemostatic powder 7 from being damaged or contaminated. The bottom of the protective sleeve 9 has a positioning groove 13 aligned with the chitosan hemostatic powder 7. The positioning groove 13 is used to locate the radial artery puncture point, improving the accuracy of the compression point so that when the compression pad 6 applies pressure to the puncture area, the wound can be aligned with the chitosan hemostatic powder 7. The bottom of the protective sleeve 9 also has a guide groove 11 connecting the positioning groove 13 to the front sidewall. Figure 3 As shown, the guide groove 11 is inclined with the front higher than the back. The guide groove 11 is used to engage the puncture sheath, thereby positioning the pressure point and preventing the protective sleeve 9 from sliding laterally and avoiding the pressure point from shifting. The top of the protective sleeve 9 has an opening 12 that communicates with the rear side wall for the moving screw 3 to pass through, such as... Figure 3 and Figure 4 As shown, the opening 12 is located on the rear side of the top of the protective sleeve 9. When the protective sleeve 9 is fitted onto the pressure pad 6 from front to back, the lower end of the moving screw 3 can be inserted into the opening 12 from the rear side of the protective sleeve 9. To elaborate further, such as Figure 6 , Figure 7 and Figure 8 As shown, this embodiment preferably includes a buckle plate 8, which has a perforation for finger insertion. During use, medical personnel can insert their fingers into the perforation, allowing them to pull the buckle plate 8. One end of the buckle plate 8 is hinged to the front end of the protective sleeve 9. Two connecting rings 14, arranged parallel to each other, are fixed to the hinged end of the buckle plate 8. Figure 6 and Figure 7 As shown, the connecting ring 14 is located at the front end of the buckle plate 8, and two connecting rings 14 are located on the left and right sides of the top of the buckle plate 8; the front ends of the left and right side walls of the protective sleeve 9 are horizontally fixed with pivots, and the two connecting rings 14 are independently mounted on the two pivots respectively; by swinging the buckle plate 8, the buckle plate 8 can swing at the hinge point angle. When the buckle plate 8 swings to the front end of the protective sleeve 9, it is convenient for medical staff to pull the buckle plate 8 with their fingers. When the buckle plate 8 swings to the bottom of the protective sleeve 9 and is parallel to the protective sleeve 9, the buckle plate 8 can protect the bottom of the protective sleeve 9 and prevent the bottom of the protective sleeve 9 from being damaged or contaminated; when the buckle plate 8 swings to the bottom of the protective sleeve 9 and is parallel to it, a locking component is provided between the swing end of the buckle plate 8 and the protective sleeve 9 to lock the buckle plate 8 after swinging, such as Figure 6 and Figure 7As shown, the locking assembly includes a side plate 15, which has an "L"-shaped structure. A vertical section of the side plate 15 is fixed to the swing end of the buckle plate 8, and a horizontal section of the side plate 15 faces away from the buckle plate 8. A locking block 16 for pressing against the protective sleeve 9 is fixed on the vertical section of the side plate 15. When the buckle plate 8 swings to the bottom of the protective sleeve 9 and is parallel to it, the side plate 15 is located behind the protective sleeve 9, and the locking block 16 is engaged with the lower sleeve wall of the protective sleeve 9. The locking block 16 blocks the lower sleeve wall of the protective sleeve 9, preventing the buckle plate 8 from swinging freely and thus preventing it from detaching from the protection of the bottom of the protective sleeve 9. When it is necessary to swing the buckle plate 8 forward, the horizontal section of the side plate 15 can be engaged, allowing the side plate 15 to... The vertical section bends and deforms, allowing the locking block 16 to disengage from the bottom of the protective sleeve 9, enabling the buckle plate 8 to swing freely at a new angle. This solution as a whole constitutes a pull assembly that makes it easy for medical staff to pull it out of the compression pad 6. Of course, the pull assembly can also use a thin film, which can be made of medical-grade PE, PU, or other materials. The thin film is fixed to the front side wall of the protective sleeve 9. The thin film can swing up and down at an angle through its own deformation ability. When the thin film swings to the bottom of the protective sleeve 9, it can cover and protect the bottom of the thin film, preventing damage and contamination to the bottom of the protective sleeve 9. Of course, after the thin film swings forward, medical staff can pull the protective sleeve 9 out by pulling the thin film.
[0016] In actual use, rotate the adjusting cover 2 to raise the moving screw 3 to its highest position, swing the buckle plate 8 to the front of the protective sleeve 9, align the positioning groove 13 at the bottom of the protective sleeve 9 with the puncture point, and engage the puncture sheath in the guide groove 11 to position the protective sleeve 9 so that the drug loading hole is aligned with the puncture point. Connect the fixing strap and fix the hemostat to the arm at the puncture site. Fix the hemostat with one hand to prevent displacement, and insert the fingers of the other hand into the perforation on the buckle plate 8. Pull the buckle plate 8 to pull the protective sleeve 9 out of the pressure pad 6. Gently pull out the sheath. After the blood fills the drug loading hole, it indicates that the chitosan is fully saturated and chemical hemostasis has started. Then, gradually rotate the adjusting cover 2 to move the moving screw 3 downward, and the pressure pad 6 applies pressure to the puncture point until the hemostatic pressure is reached. Using two hemostatic methods simultaneously can effectively improve the hemostatic effect.
Claims
1. A chitosan-loaded knob-type radial artery compression hemostat, comprising a compression device body, characterized in that: The bottom of the moving screw (3) of the compression device body is fixed with a compression pad (6). The bottom of the compression pad (6) is provided with a drug loading hole, and chitosan hemostatic powder (7) is provided in the drug loading hole. A protective sleeve (9) with front and rear communication is independently fitted on the compression pad (6). The top of the protective sleeve (9) is provided with an opening (12) that communicates with the rear side wall for the moving screw (3) to pass through. The protective sleeve (9) is provided with a pulling component that makes it easy for medical staff to pull it out of the compression pad (6).
2. The chitosan-loaded knob-type radial artery compression hemostat according to claim 1, characterized in that: The bottom of the protective sleeve (9) is provided with a positioning groove (13) aligned with the chitosan hemostatic powder (7), and the bottom of the protective sleeve (9) is provided with a guide groove (11) that connects the positioning groove (13) with the front side wall.
3. The chitosan-loaded knob-type radial artery compression hemostat according to claim 2, characterized in that: The guide groove (11) is inclined in a way that is higher in the front and lower in the back.
4. The chitosan-loaded knob-type radial artery compression hemostat according to claim 1, characterized in that: The pulling assembly includes a buckle plate (8), which has a through hole for finger insertion. One end of the buckle plate (8) is hinged to the front end of the protective sleeve (9). When the buckle plate (8) swings to the bottom of the protective sleeve (9) and is aligned with it, a locking assembly is provided between the swing end of the buckle plate (8) and the protective sleeve (9) to lock the buckle plate (8) after swinging.
5. The chitosan-loaded knob-type radial artery compression hemostat according to claim 4, characterized in that: The locking assembly includes a side plate (15), which has an "L" shaped structure. The vertical section of the side plate (15) is fixed to the swing end of the buckle plate (8), and the horizontal section of the side plate (15) faces away from the buckle plate (8). A locking block (16) for pressing the protective sleeve (9) is fixed on the vertical section of the side plate (15).
6. The chitosan-loaded knob-type radial artery compression hemostat according to claim 1, characterized in that: A sponge sheet (10) is provided between the bottom of the movable screw (3) and the chitosan hemostatic powder (7).
7. The chitosan-loaded knob-type radial artery compression hemostat according to claim 4, characterized in that: Two connecting rings (14) are fixed on the hinge end of the buckle plate (8) and are arranged in parallel left and right. The front ends of the left and right side walls of the protective sleeve (9) are fixed with pivots horizontally, and the two connecting rings (14) are independently fitted onto the two pivots respectively.