98results about How to "Reduce blood loss" patented technology

The present invention is directed to a blood aspiration system that is configured to enable various types of aspiration through a working lumen of a catheter. The blood aspiration system facilitates natural aspiration by providing a circuit between a patient's arterial and venous vasculature, and also comprises a manually actuated pump configured to selectively vary rates of aspiration in the working lumen. The blood aspiration system further comprises an external port that allows suction-assisted aspiration or infusion through the working lumen, and further comprises a detachable filter that removes emboli prior to reperfusing blood into a patient's venous vasculature.

An apparatus and method for connecting a first conduit to the heart without the need for cardiopulmonary bypass. The first conduit may then be attached to a second conduit that has a prosthetic device interposed. The second conduit may be connected to the aorta prior to the first conduit being attached to the heart. The prosthetic device may be a prosthetic valve or a pump, for example. The apparatus of the present invention includes an implantable connector with first conduit component, a retractor expansion component, a coring component, and a pushing component. The retractor expansion component is slide-ably coupled to the coring component. The retractor expansion component serves to seat against and separate the inside apical wall of the left ventricle so that the coring component may cut cleanly through the myocardium to form a tissue plug without leaving any hanging attachments to the inside walls. By remaining seated against the inside wall, the retractor expansion component follows the tissue plug into the coring component. The surgeon applies force and rotary motion to the pushing component sufficient to cut the tissue plug and implant the prosthetic component.

Instrument port for allowing access to the interior of the heart or other organ while minimizing blood loss.

Methods and devices for performing endocardiac treatments using an instrument port placed in the heart wall and an instrument guide which has a steerable tip and which is inserted through the instrument port, allows passage of an instrument therethrough into a heart chamber, and steers the functional tip of the instrument to the desired location for treatment.

An apparatus and method for connecting a first conduit to the heart without the need for cardiopulmonary bypass. The first conduit may then be attached to a second conduit that has a prosthetic device interposed. The second conduit may then be connected to the aorta. The prosthetic device may be a prosthetic valve or a pump, for example. The apparatus of the present invention includes an implantable connector with first conduit component, a retractor expansion component, a coring component, and a pushing component. The retractor expansion component is slide-ably coupled to the coring component. The retractor expansion component serves to seat against and separate the inside apical wall of the left ventricle so that the coring component may cut cleanly through the myocardium to form a tissue plug without leaving any hanging attachments to the inside walls. By remaining seated against the inside wall, the retractor expansion component follows the tissue plug into the coring component. The surgeon applies force and rotary motion to the pushing component sufficient to cut the tissue plug and implant the prosthetic component.

Apparatus for attaching a left ventricular assist device (LVAD) to a heart, the apparatus comprising: a connector conduit comprising: a distal end, a proximal end and a lumen extending between the distal end and the proximal end, wherein the distal end is configured to be inserted into a wall of the heart, and the proximal end is configured to receive the LVAD, whereby hemostasis is maintained during insertion of the connector conduit into the wall of the heart and during insertion of the LVAD into the proximal end of the connector conduit.

The invention discloses a method for determining a distal femur cuneiform plane in a digital auxiliary mode. The method mainly comprises the following steps that 1, continuous sectional CT scanning is performed on a patient, and image data is obtained; 2, three-dimensional data of a knee joint prosthesis is obtained through reverse engineering means; 3, polygonal processing and precise curved surface processing are performed on the three-dimensional data of the thighbone and the knee joint prosthesis; 4, marking and checking of synostosis mark points are performed in computer aided design software; 5, the cuneiform plane is determined for performing cuneiform rehearsal. The method has the advantages that digital means is adopted before operation, synostosis mark points, axes, prosthesis models, cuneiform planes and the like are determined, and an operation path can be better planned, and an operation plan can be designed; the cuneiform plane does not need to be determined by opening a medullary space, wounds are reduced, and the bleeding volume and fat embolism occurrence probability are lowered; computer assistant positioning is performed, the positioning accuracy is improved, the operation effect is better, and the patient recovery time is shortened.

The invention provides a proximal femoral anti-rotation locking device, which comprises a bone setting plate and a locking screw, wherein one end of the bone setting plate is a head part, the other end of the bone setting plate is a rod part, the head part is pasted with the greater trochanter, the rod part is pasted with the outer side of the thighbone, the head part is provided with five head threaded locking holes and two needle guide holes, the five head threaded locking holes respectively allow five locking screws extending into the greater trochanter, the femoral neck and the femoral calcar to be arranged on the head of the bone setting plate in a crossed way, the axial line direction of the five head threaded locking holes respectively forms an included angle with the plane and the vertical surface of the bone setting plate plane, through the axial line space, the inserted screws cannot mutually touch each other, and three lower locking screws in the five are crossed with the two upper locking screws. The proximal femoral anti-rotation locking device has the advantages that the locking screw looseness and the bone fracture setting loss can be effectively avoided, and the coxa vara malformation and the like are prevented; in addition, the application range is wide, and the proximal femoral anti-rotation locking device is applicable to instability, thrypsis, osteoporosis and intertrochanteric fracture in the old; finally, the proximal femoral anti-rotation locking device conforms to the proximal femoral anatomical structures, the pasting effect is good, the direction of the locking screws is relatively fixed, and the operation is convenient.

The invention discloses a low-blood-loss micro axial-flow type artificial heart which comprises a vane wheel, a motor rotor, and a motor stator, wherein the vane wheel is arranged inside the motor rotor in an interference fit and coaxial mode, the vane wheel is placed between an entry guide vane and an exit guide vane, two flow-guiding cones with large ends of 3mm are respectively arranged on an inlet end of the entry guide vane and an outlet end of the exit guide vane, the conical degree of the flow-guide cone is 90 degrees, and the two flow-guiding cones are in symmetrical arrangement. The helical angle of each flow-guiding vane on the entry guide vane gradually reduces from 90 degrees to 30 degrees along the axial direction from the inlet end to the outlet end, and the helical angle of each flow-guiding vane on the exit guide vane 3 gradually increases from 30 degrees to 90 degrees along the axial direction from the inlet end to the outlet end. The vanes on the vane wheel and all the flow-guiding vanes are in the shape of a logarithm helical line. Shaftless drive of the vane wheel reduces thrombus risk, and the micro structure improves the ability to implant. The low-blood-loss micro axial-flow type artificial heart has the advantages of being low in hemolysis, strong in implanting ability, simple in structure, high in reliability and the like.

The invention provides a quantitative blood stream limiting device which comprises a blood stream detection device, a blood stream limiting device and a control system; and the blood stream detection device and the blood stream limiting device are respectively connected with the control system. The blood stream detection device is an ultrasonic Doppler probe; the blood stream limiting device is an elastic circular sac filled with fluid; and the flow of the fluid in the ultrasonic Doppler probe and the elastic circular sac are controlled by the control system. Due to the adoption of the quantitative blood stream limiting device, the blood stream of organs can be limited quantitatively and precisely, so that the impact on the functions of the organs is minimized while the blood loss in a surgery is minimized.

The embodiment of the invention discloses a heart bioprosthetic valve with a valve leaflet capable of being repeatedly replaced through a minimally invasive surgery. The heart bioprosthetic valve comprises a valve support (1) and the replaceable valve leaflet (2), wherein the valve support (1) is used for being sewed with the tissue, and the valve support (1) and the replaceable valve leaflet (2) are in tight connection through a clamping groove (3) and a sealing groove (4) in the valve support (1). When the heart bioprosthetic valve is implanted in a patient through a thoracic surgery, the function of the valve leaflet degenerates, and the heart bioprosthetic valve is required to be replaced, through the minimally invasive surgery, a conveying device with a new valve leaflet can be guided by a visualization device to take down the damaged valve leaflet by a valve leaflet removing device of the conveying device, meanwhile, the new valve leaflet is expanded to be installed on the valve support to complete replacement of the valve leaflet, the damaged valve leaflet can be compressed to be installed in the conveying device which is pulled out of the human body, and replacement of the heart bioprosthetic valve is finished. According to the heart bioprosthetic valve, the risk of huge traumas caused by the fact that the thoracic surgery is required to be carried out on the patient again to replace the heart bioprosthetic valve due to the reason of the service life after the heart bioprosthetic valve is implanted in the human body is reduced.

A laparoscopic liver resection device is described. The device combines the Radiofrequency Ablation (RFA) technology with a cutting mechanism, a blood- flow sensor and a flexible actuation mechanism to simultaneously coagulate and cut the liver tissue and detect the presence of blood flow to confirm avascularity. The present invention eliminates the risk of excess bleeding due to cutting too deep and reduces recovery time and the time spent on re-coagulation of coagulated areas, thereby shortening duration of surgery. Also embodiments prevent excess ablation by stopping ablation activity on the target tissue as soon as insufficient or no blood flow in the target tissue is detected. Thus a closed loop control for a bloodless tissue / organ division method is provided.

The invention discloses a semi-self-locking acetabulum posterior wall and posterior column anatomical plate which comprises a steel plate main body, a self-locking sleeve and self-locking screws, wherein the steel plate main body is sequentially provided with a first fixing region, a first location region, a main fixing region, a second location region and a second fixing region, the main fixing region is provided with self-locking screw holes, the first fixing region and the second fixing region are provided with non-self-locking screw holes, and the first location region and the second location region are provided with location holes. The invention can be properly twisted and bended and is in convenient moulding so as to be better jointed to a skeleton to bear joint motion load, enable the fracture to be normally healed and reduce complications such as loosening, displacement, pains, bone stress shielding and the like at a later stage of fracture. The invention has the advantages ofhaving less internal stress and relatively according with acetabulum anatomy and biomechanics, enhances the success rate of a fracture internal fixation operation, avoids moulding in the operation, saves the operation time, reduces the blood loss in the operation, reduces the anesthetic time and lowers the operation risks.

The invention relates to snake venom protease polypeptides and nucleic acid sequences encoding same. This invention also relates to methods of making and using the snake venom proteases, e.g., to promote haemostasis and prevent blood loss such as during surgery or for treatment of wounds resulting from accidents and other types of injury or trauma.

A cutting center for shaping the femur condyle is composed of a speed variator, a main drive shaft in said speed variator, a main drive gear installed to said main drive shaft, at least one driven gear matched with said main drive gear and installed to the first driven shaft in said speed variator, and a cutter installed to the extended end of the first driven shaft.

The invention belongs to the technical field of medical materials, and particularly relates to alkyl chitosan-graphene oxide composite sponge and a preparation method and application thereof. The composite sponge comprises alkyl chitosan and graphene oxide adsorbed on alkyl chitosan, and adsorption capacity of graphene oxide is 3-28%. The composite sponge obtained by taking alkyl chitosan as a matrix and compositing graphene oxide and alkyl chitosan has excellent hemostatic performance and blood absorbing capacity. Embodiment results show that when the composite sponge is used for hemostasis,in-vitro whole blood coagulation time is less than 58s, hemostasis time of a rabbit femoral artery bleeding model is less than 155s, bleeding amount is less than 5.4g, and hemostasis effect is betterthan pure alkyl chitosan sponge or graphene oxide powder.

The invention relates to injectable and degradable dry hemostatic cryogel with good shape memory and blood coagulation capability as well as a preparation method and an application of the injectable and degradable dry hemostatic cryogel. Chitosan is resuspended in deionized water, glacial acetic acid is dropwise added under stirring, and a CS solution is obtained after uniform mixing; dopamine hydrochloride is added to the deionized water to prepare a DA solution; the CS solution is mixed with the DA solution, an oxidant solution is added simultaneously, and the solutions are uniformly mixed to obtain a mixed solution; and finally, the mixed solution is placed at the temperature of subzero 7-subzero 20 DEG C to react for 12-36 h, a cross-linked cryogel network in a frozen state is obtained, and is placed in the deionized water to be melted, freeze drying is conducted, and the injectable and degradable dry hemostatic cryogel with good shape memory and blood coagulation capability is obtained. The cryogel dressing has high elasticity and ultrafast shape recovery capability, can quickly absorb blood, and has photo-thermal antibacterial performance and the like.

A method of inhibiting microvascular bleeding is provided. Antibody to protein C administered to a patient in a pharmaceutically acceptable carrier prevents anticoagulation by greater than 90% of activated protein C in human plasma.

The invention discloses a reciprocating type thrombus plaque cutting device and belongs to the technical field of medical appliances. The reciprocating type thrombus plaque cutting device comprises asheath tube, a power output link, a sucking chamber and a handle, wherein the sheath tube is fixedly connected to the top end of the sucking chamber; the power output link penetrates through the sheath tube and a U-shaped chamber and can move back and forth in the sheath tube; a liquid flow chamber is formed between the sheath tube and the power output link and communicates with the U-shaped chamber through a connecting flow passage; a cam mechanism is arranged in the U-shaped chamber and drives a U-shaped link to reciprocate in the U-shaped chamber; and a cutter head is fixedly connected intoa gap between the top end of the power output link and the sheath tube. According to the reciprocating type thrombus plaque cutting device, the cutter head is internally installed and cannot injure periphery blood vessels, and sucking in the U-shaped chamber is of indirect work, so that blood loss of a sufferer during surgical operation is reduced.

A spacing device for supporting a joint adjacent to diseased bone or missing bone tissue, comprising a support piece and a semi-resilient pad. The pad is shaped to cradle and support the healthy bone joint. The reverse side of the pad is fixedly connected to one end of the support piece. The other end of the support piece is shaped to straddle healthy tissue adjacent the damaged area, such as the ilium when supporting a hip joint and is to be fixedly connected to the adjacent healthy tissue, using a suitable mechanism, such as biocompatible Steinman pins. Diseased, damaged, or necrotic tissue can be removed without requiring removal of the natural bone joint. Because the undamaged bone joint is not replaced, the problems commonly experienced during and following bone joint replacement are avoided. In particular, blood loss during surgery, surgical cost, surgical time, and rehabilitation of the patient after surgery is reduced. The method of implanting the spacer for supporting a bone joint includes the steps of exposing the joint; curetting damaged tissue from the bone; selecting an appropriately sized spacer for the joint; inserting the spacer into position adjacent healthy bone tissue and the joint; seating the spacer in an appropriate position; and fixedly securing the spacer in the position.

The invention discloses an anticoagulation coating guide sheath, which comprises a guide sheath body and an expander catheter which are coaxially arranged. A hydrophilic coating is arranged on the outer surface of the expander catheter; the guide sheath comprises a sheath tube and a sheath seat; a side hole is formed in the sheath head; an anticoagulation coating is arranged on the outer surface of the sheathing tube; a three-way cavity, a first hemostasis device, a second hemostasis device, a guide assembly and a connector assembly are sequentially arranged in the sheath seat from head to tail. The first hemostasis device is made of elastic materials and provided with a first channel which is gradually increased, a blood groove is formed in the head end of the second hemostasis device, asecond channel is formed in the center of the tail end of the second hemostasis device, the tail of the blood groove communicates with the second channel, a guide groove is formed in the tail end of the guide assembly, and a plurality of first reinforcing ribs are arranged on the side wall of the guide groove in the circumferential direction. The blood outflow can be reduced, the entered expandercatheter or other instruments are fixed and centered, the blood coagulation risk is reduced, the cavitation is reduced, and the retention time is prolonged.

The invention provides fluid suction equipment for controlling suction pressure, medical equipment and a blood vessel suction method. A suction pump is connected with a suction pipeline and used for providing pulse pressure to suck fluid; a fluid flow velocity, pressure or flow sensor is arranged in the suction pump, the suction pipeline or any position where the fluid flows between the suction pump and the suction pipeline, and the fluid flow velocity, pressure or flow sensor is electrically connected with a controller of the suction pump; resistance in the suction pipeline is obtained according to results detected by the fluid flow velocity, pressure or flow sensor; and the suction efficiency of the suction pump is improved when detecting that resistance increase exceeds a preset value. By means of the fluid suction equipment for controlling the suction pressure, the medical equipment and the blood vessel suction method, pipeline resistance and changes of the pipeline resistance can be continuously measured in real time in the suction process, the optimal suction pressure is controlled, the suction efficiency is improved, the blood loss amount is reduced, and the suction safety is improved.

The invention discloses a three-dimensional adjustable nail locking guider for a long intramedullary nail. Three-dimensional deformation of a far end of the long intramedullary nail is decomposed intodeformation in two planes perpendicular to each other to be solved step by step. The deformation of the intramedullary nail is the displacement of a far-end nail locking hole; the displacement of thenail locking hole in one plane realizes re-accurate aiming of a guide hole and the nail locking hole through hinged rotation of a fixed guide arm and an adjusting guide arm, and accurate aiming in the plane is realized by adjusting the distance and the direction between the guide hole and the corresponding nail locking hole in the other plane; when the two planes correspond to each other, all theguide holes can be accurately aimed; according to the three-dimensional adjustable nail locking guider for the long intramedullary nail, accurate nail locking can be achieved, the problem that nail locking of the intramedullary nail is difficult is solved, the operation time can be shortened, radiation of X-rays to a patient and a doctor is reduced, bleeding is reduced, the infection proportion is reduced, and rehabilitation of the patient is facilitated.

The embodiment of the invention discloses a fusion wave laser output device and a laser therapy apparatus. The fused wave laser output device comprises a first laser, the first laser comprises a first controlled end and a continuous laser output end, and the first laser is used for outputting continuous laser through the continuous laser output end according to a first control signal received by the first controlled end; a second laser comprises a second controlled end and a pulse laser output end, and the second laser is used for outputting pulse laser through the pulse laser output end according to a second control signal received by the second controlled end; a controller is used for simultaneously sending the first control signal and the second control signal; an output fiber; and a beam combiner is used for coupling the continuous laser and the pulse laser into the output optical fiber. According to the embodiment, the operation efficiency can be improved, the visual field condition in the operation is improved, the postoperative recovery speed of a patient is increased, and the blood loss amount in the operation is reduced.

The invention discloses a stent for knee arthroplasty. The stent comprises a support bracket A, a fixing bracket, a support bracket B and a fixing rod, wherein, the support bracket A and the support bracket B are portal frames, and a plurality of clamping grooves are arranged on a cross beam A and a cross beam B; The two ends of the fixing bar are respectively clamped on the cross beam A and the cross beam B, and the fixing bracket is sleeved on the fixing bar, wherein; The fixing bracket comprises a cross bar A, a snap ring, clip A, a cross bar B, slot plate, a collar A, a bottom plate, a collar B, a clip A, a clip B, a collar A and a collar B are fixed on both sides of the bottom of the groove plate, a bottom plate is arranged between the bottom of the collar A and the collar B, one endof the cross bar A is fixed on the collar A, one end of the cross bar B is fixed on the collar B, two ends of the clamp ring are clamped on the cross bar A, and the cross bar B is clamped and fixed byclips A and clips B respectively. The invention has the advantages of short operation time, less bleeding, less medical personnel required and convenient use.

The invention relates to a quick closing device for a skin wound, which belongs to the technical field of medical devices.The quick closing device is of a double-arm nailing and clamping structure and comprises a buckle, a left clamping arm, a right clamping arm, a torsional spring and a center shaft, wherein the left clamping arm and the right clamping arm are connected by the center shaft, and the torsional spring is installed on the center shaft and is used for supplying closing power to the device. The quick closing device for the skin wound is first aid equipment suitable for various occasions. The quick closing device has the advantages of simplicity and convenience in operation, high closing speed, short learning curve and the like. The quick closing device can provide effective help for wound closing and exact hemostasis in the first time in case of an emergency. The closing device can be made of stainless steel, titanium alloy, aluminum alloy or plastic.

The invention relates to a customized medical porous renewable handle-free shoulder joint humerus head implantable prosthesis with a cage. The method comprises the following steps: scanning a shoulder joint of a patient by using CT to obtain CT tomographic image data of humerus, and establishing a three-dimensional model conforming to a shoulder joint stemless cage and a humerus head according to the CT tomographic image data; under the condition that the grain size is controlled under the assistance of ultrasonic equipment, mixing multiple types of medical nano-metals as a base material of the handle-free cage, and printing the porous handle-free cage layer by layer; printing a high-strength biological ceramic humerus head by using various medical nano biological ceramic powder; and then carrying out electron beam irradiation treatment and adding a strontium-loaded micro-nano coating to finally obtain a finished product. The design of innovative combination of the 3D porous material and the bone cage technology is adopted, infiltration growth of sclerotin is achieved, a backbone is not needed, implantation is more convenient, complications related to the humerus component handle in a revision operation where the humerus component handle needs to be removed are avoided, and the success rate of the operation is increased; the humerus head obtained by the invention also has higher strength, corrosion resistance and biocompatibility.

The invention belongs to the technical field of polymer hemostatic materials, and discloses a fluorine-containing copolymer antibacterial hemostatic material and a preparation method thereof.The method comprises the following steps that S1, under protective gas, fluorine-containing acrylate monomers, acrylic monomers, an initiator and a solvent are mixed for a reaction, and after the reaction is finished, a reaction product is obtained; washing to obtain a fluorine-containing acrylic copolymer; s2, reacting the fluorine-containing acrylic copolymer with a cross-linking agent, and after the reaction is finished, drying to obtain a cross-linked fluorine-containing acrylic copolymer; and S3, adding the cross-linked fluorine-containing acrylic copolymer into the antibacterial agent solution to react, and after the reaction is finished, dialyzing to obtain the fluorine-containing copolymer antibacterial hemostatic material. The method is simple and easy to regulate and control, the prepared antibacterial hemostatic material can be prepared into a coating on the surface of gauze or suture lines, and the coating has excellent hemostatic performance and bactericidal activity and has good application prospects in the aspects of biology, medicine, sanitation and the like.