96results 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.

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 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.

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.

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 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 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.

The invention discloses an animal femoral surgery positioning and fixing device. The animal femoral surgery positioning and fixing device comprises a femoral positioning and fixing table, wherein thefemoral positioning and fixing table is provided with bone holding forceps for clamping an animal femoral shaft, a femoral positioning and fixing panel for fixing the neck of the bone holding forceps,and a fixing bin for fixing a handle of the bone holding forceps; and the femoral positioning and fixing table is used for limiting and fixing the surgical standard position of an animal femur in a femoral surgery, so that a surgical operation platform for a three-dimensional standard image of the femoral surgery is formed. By the animal femoral surgery positioning and fixing device, standardization of a femoral external fixation surgery for implementing experimental models such as femoral fracture, segmental bone defect and distraction osteogenesis can be guaranteed, so that a femoral modelsurgery technology has repeatability and data reliability. The animal femoral surgery positioning and fixing device is assisted by a three-dimensional digital fixing frame as an external fixing frame,and is linked with a synchronous laser marking navigation unit, so that a required large-environment suitable body position for the surgery is provided for a surgical operator, accurate positioning is realized, and meanwhile, a required basic environment is provided for a surgical robot operating system.