203 results about "Self expansion" patented technology

A system for delivering and deploying a self-expandable heart valve includes a deployment mechanism that engages the valve and regulates the rate of expansion of both the proximal and distal ends thereof. The deployment mechanism may include a plurality of distal fingers and a plurality of proximal fingers that engage the end portions of the heart valve. Controlled radial movement of the fingers regulates the expansion of the heart valve such that the proximal and distal ends radially expand at the same rate. A stabilization balloon may be used to axially and radially locate the deployment mechanism relative to the site of implantation. Methods of operation of the delivery and deployment mechanism include regulating the rate of self-expansion of the valve and forcing the valve outward into its fully expanded configuration utilizing the same or different means.

Described herein are applicators for the delivery and / or retrieval of a bone stabilization device, as well as systems or kits including such applicators. In general, these applicators include a proximal handle and an elongate cannula configured as a linkage member connecting to the implant. The handles described herein typically include a control for regulating / controlling the release of the stabilization device. Stabilization devices are typically self-expanding devices, and the control may regulate the self-expansion so that the rate and degree of self-expansion allowed is regulated. The handles may be lockable, and may include a latch or other locking structure. These handles may also include ratcheting mechanism or other controlled expansion / release mechanism. In some variations the devices include a failsafe release configured to release either the applicator and / or the device.

The invention discloses a drainage method of a non-cell-cementation cased-hole-completion coal bed gas horizontal well. The method includes: a U-shaped butted well is used, the horizontal section of the horizontal well is deployed along the declination direction of a coal bed and a direction parallel to the minimum main stress of the coal bed, and well completion is performed by using casing running and an external self-expansion casing packer in a non-cell-cementation manner; the setting section, perforation and fracturing section of the external casing packer of the horizontal well are optimized; perforation is performed in a large-displacement and fixed-direction hydraulic abrasive perforation manner, and slug insertion type sand-carrying fracturing is performed on the horizontal well section by section in a large-displacement, large-scale, high-prepad-fluid-ratio and medium-sand-ratio manner; draining is performed at the wellhead of a drainage vertical well, and gas production is performed at the wellhead of the horizontal well. The drainage method has the advantages that pollution of a coal reservoir and production and operation costs can be lowered, the fracturing transformation effect and draining and gas production effect of the non-cell-cementation cased-hole-completion horizontal well are improved, the drainage efficiency and effect of the horizontal well are increased, the coal bed gas content of soft, broken and low-permeability coal beds can be lowered in a large-range and fast manner, and intensified coal bed gas drainage is achieved.

The invention relates to a method for preparing a biodegradable polymer self-expansion type intravascular stent based on 3D printing technology.The method includes the specific steps of synthesizing polylactic acid-based shape-memory polyurethane / Fe304 nanocomposite material with good biocompatibility and biodegradability, and making the composite material into the intravascular stent through the Fused Deposition Modeling technology.In addition, in order to increase the blood vessel endothelium repair speed, sirolimus, heparin, endothelial growth factors or the like are selectively introduced to the stent surface through electrostatic spinning.A 'time'dimension is added for the shape-memory function of the base material, and combined with the 3D printing technology, a 4D forming concept is given to the stent.By means of the magnetocaloric effect of Fe304, shape recovery of the shape-memory polymer can be remotely excited, so that the intravascular stent expands automatically, balloon dilatation is not required during stent implantation, axial shortening during balloon dilatation and radial resilience during withdraw of the stent are avoided, and damage of blood vessels is reduced to a minimum level.In addition, the introduction of Fe304 solves the problem that a polymer stent has poor development.

The invention discloses an automatic expansion shaft which comprises a self-expansion part and a driving part. The self-expansion part comprises a sleeve. The circumference of the sleeve is symmetrically provided with a plurality of continuous grooves along axial direction. The sleeve is connected with a grooved sheave. A nut is arranged in the sleeve. The external circumference of the nut is an oblique cone plane. Sliding trays corresponding to the continuous grooves are arranged on the oblique cone plane of the nut. An expansion flake is arranged on every sliding tray. The external end surface of the expansion flake towards the external circumference is a lug boss which passes through the continuous grooves. The expansion flake is connected with the inner wall of the sleeve through a spring. The grooved sheave of the self-expansion part is connected with a positioning plate in a switching way. The positioning plate is connected with an electromagnetic valve. The electromagnetic valve and a DC electric machine are all connected with a control system. The automatic expansion shaft has the advantages of simple structure and using reliability, uses an electric actuator for replacing the manual ballooning operation and saves a compressed air source unit, thereby realizing the total automation from paper rolling to loading and unloading.

A self inflatable mattress includes a main portion with a first chamber and a sponge in the first chamber, an extended portion and having a second chamber, a valve mounted on the main portion to allow surrounding air to enter the first chamber and a unidirectional valve received in the extended portion and sandwiched between the first chamber and the second chamber to provide alternate communication between the first chamber and the second chamber. A self expansion of the main portion due to the automatic expansion of the sponge from a compressed state to a non-compressed state allows the surrounding air to enter the first chamber, the air inside the first chamber is able to be forced to enter the second chamber by pushing away the unidirectional valve to resume communication between the first chamber and the second chamber so that the second chamber is inflated.

The invention discloses a blood vessel bracket prosthesis. The blood vessel bracket prosthesis comprises an artificial blood vessel prosthesis and a self-elasticity bracket, wherein the artificial blood vessel prosthesis is fixed on the outer side of the self-elasticity bracket through a suture line; the self-elasticity bracket consists of a plurality of self-expansion rings; the self-expansion rings are partially sutured on the artificial blood vessel prosthesis; a tube body of the artificial blood vessel prosthesis has a corrugate shape; the plurality of self-expansion rings are dispersedly arranged in the artificial blood vessel prosthesis at uniform intervals; and parts near the sides of the self-expansion rings, are sutured on the artificial blood vessel prosthesis. The blood vessel bracket prosthesis can avoid blood vessel deformation caused by that a tectorial membrane bracket is folded after being implanted into a human body and can avoid other problems caused by blood vessel deformation.

A new multiple component stent arrangement which allows for initial self-expansion and subsequent deformation to a final enlarged size.

The invention belongs to the technical field of building materials and in particular relates to a grouting material used for a concrete structure. The self-expansion type high-flow regime quick-hardening early-strength repairing grouting material is characterized by comprising sulfate aluminum cement, metakaolin, gypsum, a high efficiency water-reducing agent, an antifoaming agent, sand and water. The material comprises the following raw materials in part by weight: 0.1 to 50 parts of silicate cement, 30 to 80 parts of sulfate aluminum cement, 10 to 25 parts of metakaolin, 4 to 8 parts of gypsum, 0.1 to 1 part of high efficiency water-reducing agent, 0.01 to 1 part of retarder, 0.1 to 0.3 part of antifoaming agent, 50 to 150 parts of sand, and 26 to 30 parts of water. The material has thecharacteristics of moderate early expansion, high volume stability at later stage, excellent homogenization and no bleeding isolation, self-expansion, high flow regime, quick hardening and early strength.

The invention discloses a multistage sectional grouting-free self-expansion type anchoring rod. The anchoring rod comprises an anchoring rod body, wherein a sleeve is sleeved on the anchoring rod body; a conical head is arranged at the upper end of the sleeve; 2 to 10 ring-shaped cone platforms are arranged on the anchoring rod body, and a group of four symmetrically-distributed wedge blocks are fixedly arranged on the anchoring rod body below each ring-shaped cone platform through hoops which are arranged in limiting seats of the wedge blocks; four symmetrically-distributed bosses are arranged below each group of the wedge blocks on the inner side of the sleeve, and springs for tightly pressing the wedge blocks upwards are arranged on the bosses; and strip-type square holes are formed in plastic sleeves at corresponding positions of the wedge blocks. The anchoring rod is uniquely designed in structure, is firmly and reliably mounted, is simple and quick in construction process, and can reach designed anchoring strength without anchoring rod grouting construction, so that the wall rock stability of a tunnel project is greatly improved, the construction period is shortened, the working efficiency is improved, the length of an anchoring section of the anchoring rod can be increased, the cross sectional area of the anchoring rod body is reduced, the steel consumption of the whole project is reduced, and the anchoring rod has good economic values.

The invention discloses multifunctional medical biological bone cement. The multifunctional medical biological bone cement is prepared from the following raw materials in percentage by mass: 5%-15% of polyacrylic acid microspheres, 20% of bioactive glass, 64.9%-74.9% of calcium phosphate bone cement and 0.1% of nanometer alendronate sodium microspheres, wherein the sum of the mass percentages of the raw materials is 100%. The multifunctional medical biological bone cement has the function of water absorption self-expansion; the using amount of the bone cement can be reduced, and further the leakage of the bone cement is reduced; the multifunctional medical biological bone cement has relatively good tissue compatibility, can be used for inducing the formation of new bones and enhancing the strength of vertebral bodies, is degradable in vivo without in vivo foreign matter residues; and meanwhile, the controlled-release alendronate sodium has the effects of resisting osteoporosis, reducing the absorption of bones and furthering enhancing the vertebral bodies. Therefore, the multifunctional medical biological bone cement has the advantages of little consumption, promotion of bone formation and bone absorption resistance when applied to vertebroplasty.

The invention relates to an underground controllable self-expansion casing patching pipe which comprises a patching pipe body and a controllable underground tool release device. The patching pipe body is composed of a rubber inner container, a memory alloy ring and a leaking stoppage rubber barrel. The inner surface of the leaking stoppage rubber barrel and the outer surface of the rubber inner container are adhesively connected through a temperature resistance adhesive. The controllable underground tool release device at least comprises a temperature controller, a cable, a heat pipe, a heating winding wire, a stainless steel protective pipe, a thermocouple, a centering barrel and a conical limiting barrel. The stainless steel protective pipe is located inside the centering barrel. The heat pipe is located inside the stainless steel protective pipe. The heating winding wire is evenly wound around the heat pipe. The thermocouple is fixed to the inner wall of the centering barrel. The thermocouple and the heating winding wire are electrically connected with the temperature controller through the cable. The centering barrel is sleeved with the patching pipe body which is clamped to the top of the conical limiting barrel. Casing patching work can be completed without hydraulic expansion or gunpowder explosion or other means, operation is convenient, and construction is safe.

The invention relates to a multi-strategy edge computing resource scheduling method based on an improved bee colony algorithm, which is mainly characterized in that: firstly, the improved bee colony algorithm gives full play to the advantage of elastic expansion of an edge computing platform, so that the selection range of an edge node server is not limited; Secondly, a two-stage updating optimalscheduling mode is adopted, and first-stage updating of the candidate edge node servers is achieved through self-expansion and replacement of all the candidate edge node servers; Second-level updatingof the candidate edge node servers is achieved in a system random expansion mode, and the vacancy in the candidate edge node server set is filled in time; And thirdly, through the introduction of theimproved bee colony algorithm idea, the situation that the load of a certain candidate edge node server is too large due to the fact that the candidate edge node server is frequently selected for container scheduling is effectively avoided, the load balance between the candidate edge node servers is realized, and the system availability and stability are enhanced.

The invention relates to a medical self-expandable occlusion device for treating heart defects of a patient, especially for closing abnormal holes in the tissue. The occlusion device (1) can be inserted into the body of a patient by means of a catheter system in a minimally invasive manner. The occlusion device (1) consists of an interlaced structure (1) of thin threads, the interlaced structure (10) having a first shape during insertion of the occlusion device into the body of the patient, which shape can be previously determined, and a second shape in the implanted position of the occlusion device, which shape can be previously determined, the occlusion device in the first shape of the interlaced structure (10) being in a folded condition and in the second shape of the interlaced structure (10) being in an expanded condition. The aim of the invention is to provide an occlusion device which can be implanted in as gentle a manner possible for the patient. For this purpose, the threads of the interlaced structure (10) consist of a shape memory polymer composition so that the interlaced structure (10) is deformed under the effect of an external stimulus from a temporary shape to a permanent shape, the temporary shape being the first shape of the interlaced structure (10) and the permanent shape being the second shape of the interlaced structure (10).

The invention relates to a segmented oil-stabilizing water-controlling method and device, and the segmented oil-stabilizing water-controlling method and device are used for plugging a plurality of layers of a horizontal well and self-adaptive water controlling and oil-stabilizing production. The segmented oil-stabilizing water-controlling method comprises determining the plugging position, and calculating the injection position and the injection amount of a chemical plugging agent in the horizontal well in dependence on the oil reservoir characteristic parameters; calculating the number and the predetermined positions of water-controlling devices on a center tubular column of the horizontal well in dependence on the oil reservoir characteristic parameters; injecting the chemical plugging agent into an annular space between the well wall and a sand-prevention outer tubular column of the horizontal well to form a chemical packer in dependence on the calculating result; achieving outer annular space plugging between the sand-prevention outer tubular column and the well wall; installing water-controlling devices in a center pipe of the horizontal well, and installing a self-expansion packer on the position, between the center pipe and the sand-prevention outer tubular column, corresponding to the chemical packer, thereby achieving inner annular space plugging between the sand-prevention outer tubular column and the center pipe, and water controlling and flow limiting. The invention also provides a device used for the above segmented oil-stabilizing water-controlling method.

The invention discloses a self-displacement universal adjustable pile driving frame and a use method thereof. The pile driving frame can incline at any angle around a vertical shaft and a transverse shaft under the action of a guide oil cylinder and move around a hinge by adopting a full-automatic hydraulic holding device, and the automatic pile driving frame can longitudinally and transversely move. The use method comprises the following steps of: preseting a pile driving position after a crane ship is positioned, positioning and locking; realizing universal inclination by swinging the pile driving frame swings around the transverse shaft and the vertical shaft through the self expansion of the guide oil cylinder and the rotation of driving the full-automatic hydraulic holding device to rotate and hanging a steel pile into the full-automatic hydraulic holding device; and clamping the steel pile by the full-automatic hydraulic holding device and automatically aligning center. The invention solves the problems that when the existing crane ship is used for driving piles, only one straight pile can be driven once, and inclined piles in any direction cannot be driven in the pile driving process, thereby greatly improving the operation efficiency.

The invention discloses a foaming type vehicle-bottom chip-resistant paint, which comprises the following compositions by mass percent: 20-35% of PVC copolymer resin, 20-35% of a filler, 25-35% of a plasticizer, 1-15% of a tackifier, 3-5% of a hygroscopic agent, 1-5% of a stabilizer, and 1-5% of a foaming agent. According to the invention, the foaming type vehicle-bottom chip-resistant paint can replace the traditional non-foaming type vehicle-bottom chip-resistant paint, reduces the vehicle weight by virtue of the self-expansion of a sealant, and can reduce loss.

The invention relates to a self-expanding inorganic foam foaming filling material for mines. The foaming filling material comprises, by weight, 82-96 parts of a hydraulic cementing material, 1-5 partsof an air entraining agent, 1-5 parts of a reactive chemical foaming agent, 0.5-2 parts of an early strengthening agent, 1-5 parts of a thickener, 0.5-1 part of a foam stabilizer and 1-5 parts of a coagulation accelerator. The foaming filling material can be conveyed for a long distance by screw grouting after being mixed with water having an amount 2-3 times the amount of the foaming filling material, so large-water-material ratio and long-distance conveying is achieved; and the above obtained slurry is continuously foamed and expanded in the conveying process, has a large expansion ratio after being discharged from a tube orifice, and also has the characteristics of certain self-expansion, permanent consolidation, and realization of no shrinkage or collapse and stable volume of a foamedbody before being completely solidified. The product has excellent construction performance, has a good fluidity in a conveying pipeline, makes the foamed body have a small specific gravity and a high strength, is suitable for filling and sealing treatment of the top-coal caving region and corners over and below of underground coal mines, is especially suitable for filling of irregular caving spaces, and realizes the dense topping effect by means of the self-expansion of the material.

The invention relates to a sale promotion engine realization method catering for Chinese marketing habit, and the method comprises the following steps: configuring a promotion-related check and management interface at the management platform at the back end; establishing promotion rules; and designing a corresponding database tablet to save already designed protection rules related data; providing notice service among the network nodes so as to synchronize the promotion data among the nodes. According to the invention, generally speaking, an expression manner is used to show the promotion activity rules, and there is already a plurality of activities designed just through the combination of expressions. Such manner has great flexibility and also supports self-expansion. The method is also beneficial for people to have better understanding about promotion. As the method is based on a platform and the promotion is also configured to be related with the shop where the current account of a user is being used. Therefore, the user does not have to be concerned that the promotion activity on the platform involves more shops.

The invention provides a self-expansion patching method of an oil-well casing. The self-expansion patching method comprises the following steps: an operating cable and a tool set are connected, and abase tube patched with an organic composite with a shape memory function is fixed between an electromagnetic expansion disc and a rigid expansion head; a wellhead is fixed, and the operating cable anda ground cable operating vehicle are connected; the operating cable drives the tool set and the patched base tube to be lowered into a well; casing damage parts are positioned, and the base tube patched with the organic composite is set; the ground is powered on; the base tube patched with the organic composite is heated to the temperature higher than the shape restoration temperature of the basetube, and the base tube is subjected to first-time interference expansion to be patched onto casing damage sections; the cable is upwards lifted, and the tool set overall upwards travels, wherein therigid expansion head, an elastic expansion head and a plug conduct second-time expansion on the base tube patched with the organic composite; and the cable and the down-hole tool set are pulled out from the interior of the well. According to the self-expansion patching method, a construction process is simple, operation is convenient, and the patched base tube is good in corrosion resisting property, safe and reliable.

The invention relates to a novel vascular stent and belongs to the technical field of stents. The novel vascular stent is composed of a cutting stent body and a weaving stent body. The vascular stent comprises supporting ribs and connection ribs, and the supporting rids are connected through the connection ribs. The supporting ribs are medical stainless steel cutting stents and of weave-shaped supporting ring structures, the cross sections of the supporting ribs are of variable cross section structures, and the cross section areas of the turning positions of the supporting ribs are the largest. The connection ribs are the self-expansion weaving stent body composed of memory alloy and woven by metal wires. The cross section areas of the supporting ribs are larger than the cross section areas of the metal wires of the connection ribs, and the supporting ribs are the main supporting portions of the stent. The connection ribs composed of the self-expansion weaving stent body are woven by thin metal wires, the flexibility is larger than that of the cutting stent body, the flexibility of the overall stent is improved, and meanwhile certain supporting performance is provided. To prevent the situation that the stent becomes narrower, the surface of the stent can be coated with a medicine coating, and slots can be formed in the surfaces of the supporting ribs for containing medicine, such as, sirolimus, taxol and rheum emodin.

The invention relates to a method for preparing a partial reinforcing manganese steel compound material of TiC / TiB2 double-phase ceramics particles by compounding a self-expansion reaction in-situ of a Cu-Ti-B4C system in steel liquid with a traditional casting method. The preparing process includes that a Cu-Ti-B4C precast block which has been vacuumized to remove gas is arranged at a part that a cast needs reinforcing and is poured by the manganese steel liquid and the Cu-Ti-B4C precast block is ignited by the high temperature of the poured steel liquid to prepare the partial reinforcing manganese steel compound material of the TiC / TiB2 double-phase ceramics particles. A basic body of the manganese steel compound material prepared by the technique is better combined with a reinforcing area and has a better comprehensive performance compared with a single ceramics particle; and simultaneously a partial reinforced mechanical part not only has the basic body with high obdurability, but also has a working position with the advantages of high rigidity, high strength, wearing resistance, anti-high temperature tiredness and oxidation; can be broadly used for various wearing resistance parts served under a working condition that impact abrasive particles are worn.

The technology disclosed herein enables an L3 network fabric including one or more spine switches having a leaf-spine topology to be self-expanded. In a particular embodiment, a method provides transferring one or more probe messages from each of the spine switches. The probe messages detect whether new computing nodes have been attached to the communication network. The method further provides receiving a reply to at least one of the probe messages. The reply identifies a new computing node that is not yet included in the L3 fabric. In response to the reply, the method provides confirming physical network interfaces of the spine switches indicate valid connections to one or more new leaf switches of the new computing node, using L3 discovery protocols to ensure the connections conform to the leaf-spine topology, and transferring probe packets between the spine switches and leaf switches, including the new leaf switches, of computing nodes connected thereto to confirm configuration of all connections between the spine switches and the leaf switches of the computing nodes. Moreover, the method provides configuring L3 protocols for routing communications exchanged with the new computing node.

The invention discloses a urine-leakage-prevention and blockage-prevention catheter, which comprises a catheter body and a guide wire, wherein the center of the catheter body is a urine discharging passage; the front section of the catheter body is provided with a self-expansion opening section; the front end of the self-expansion opening section is provided with a cap-shaped front blind end; the middle section of the catheter body is provided with a urine-leakage-prevention air bag; an anti-sliding air bag is arranged between the urine-leakage-prevention air bag and the self-expansion opening section; the urine-leakage-prevention air bag and the anti-sliding air bag are connected to a multi-passage air bag inflating connector arranged at the back section of the catheter body through an inflating passage; the self-expansion opening section is connected with a flushing and medication connector arranged at the back section of the catheter body through a flushing and medication integral passage; the back end of the catheter body is a drainage outlet; and the drainage outlet is provided with an opening sealing cap. The urine-leakage-prevention and blockage-prevention catheter has the advantages that the complete blockage probability of the catheter caliber part is reduced; the injury on the human body is reduced; the retention of harmful urine in the bladder is reduced; and the mucomembranous avascular necrosis injury due to long-time compression of the urethra inner wall tissue by the air bag in the same position is avoided.

Disclosed are an active expansion type tube seam anchor rod, and preparation and use methods of the active expansion type tube seam anchor rod. The active expansion type tube seam anchor rod is composed of a rod body, a bearing device at the rear end of the rod body, and a self-expansion device arranged in the rod body. Two longitudinal cutting seams are formed in the front end of the rod body, wherein a 120-degree included angle is formed between each longitudinal cutting seam and a tube seam. The self-expansion device is composed of a self-expansion body and an axial expansion constraint device. The self-expansion body comprises an agent barrel filled with an expanding agent, and a protection barrel arranged on the agent barrel in a sleeving mode and provided with a water permeable holein the outer wall. The expanding agent is prepared from CaO, bentonite, kaolin, a water reducing agent and a hardened material. Roadway surrounding rock is anchored by the active expansion type tube seam anchor rod, even if a tube seam anchor rod is selected, large anchoring force can also be achieved, wherein the difference between the diameter of the tube seam anchor rod and the hole diameter ofa drilled hole is not greater than 2 mm, thus the anchoring effect can be ensured, and the purposes of lowering the mounting difficulty of the tube seam anchor rod, increasing the mounting speed of the anchor rod and improving the mounting efficiency of the anchor rod can be achieved by decreasing the difference between the diameter of the tube seam anchor rod and the hole diameter of the drilledhole.

The invention discloses a flexible self-expansion temperature-resistant sealing element for continuously casted long nozzle and a preparation method thereof. The sealing element comprises a sealing element body composed of a flexible self-expansion inorganic sealing material and graphite paper arranged on the surface of the body. The flexible self-expansion inorganic sealing material includes inorganic lean powder with certain components, expanded graphite, clay, reinforcing fibers and a carbon material and additionally includes an organic binder, a sintering auxiliary agent, an anti-oxidant,a dispersant, a film-forming auxiliary agent and a flame retardant. The method includes the steps: preparing the raw materials according to the mass percentage, fully mixing evenly, adding the organicbinder and wet-milling fully, to obtain the flexible self-expansion inorganic sealing material; putting the material into a stamping die, clamping the die, and stamping to obtain the sealing elementbody; and after demoulding, drying and solidifying to obtain the sealing element finished product. The sealing element has the advantages of good sealing performance, good temperature resistance, corrosion resistance, friction resistance, flexible self-expansion, and low cost. The method is convenient to manufacture and has certain versatility.

The invention discloses an underground self-expansion hanger, which is applied to oil development. An oil pipe or a casing which is commonly used in an oil field and is accordant with the air pollution index (API) standard is adopted; the outer wall of a pipe body is sleeved with 3 to 10 self-expansion rubber barrel components prefabricated by a vulcanization process in a plant; each self-expansion rubber barrel component consists of an inner bush and a self-expansion rubber barrel; through holes are uniformly distributed on the wall of the inner bush; self-expansion rubber barrels are vulcanized in the through holes; on a using field, the self-expansion rubber barrel components are sleeved on the outer wall of the pipe body; the distances between two adjacent self-expansion rubber barrel components are the same; pipe bodies at the two ends of each self-expansion rubber barrel component are sleeved with a limiting ring respectively; and the limiting rings are fixed on the pipe bodies through fastening bolts. The underground self-expansion hanger has the advantage that: under the condition that the oil pipe is not extracted, the hanger is seated and sealed and is hung in the oil pipe for realizing a well completion process.

The invention belongs to the technical field of medical appliances and particularly relates to an elastic pressure hemostatic dressing comprising a viscose elastic compression layer, the vicious side of the viscose elastic compression layer is connected with a first cushion layer, and a self-expansion layer is connected to the top end face of the first cushion layer. The elastic pressure hemostatic dressing has the advantages that the dressing is in a double-compression structure, strapping is not required, no movement occurs, hemostasis is efficient, and chances of bleeding and hematoma are slimed.