58 results about "Venous blood flow" patented technology

This invention provides a mechanical lower extremity manipulation device to increase venous blood flow in lower extremities for the prevention of deep vein thrombosis (DVT), pulmonary embolism (PE), lower extremity edema, and other associated or related conditions. Foot plates pivoting on a base plate can be powered to provide a reciprocating action to the feet of a reclining patient. Straps can hold the patient's legs against the base plate so that the reciprocating action results in alternate planar flexion and dorsal flexion of the foot without movement of the leg in general. The resulting elongation and retraction of lower leg muscles can improve venous blood flow to reduce the risk of pathologies, such as DVT.

Venous therapy methods and apparatus improve arterial or venous blood flow, for example in the legs. Venous therapy can reduce venous backflow and can improve arterial therapy such as that provided by intermittent pneumatic compression therapy.

The invention discloses a safety venous indwelling needle with a needleless interface positive-pressure closing valve, comprising a puncture needle, a puncture needle seat and a handle, wherein, the puncture needle is formed into a puncture needle protection assembly by a puncture protection sleeve, a spring, a plunger latch and an escapement clamp; a venous indwelling needle is formed by an indwelling needle soft tube, a puncture needle guide tube, an indwelling needle seat and a sealing plug; a needless interface positive-pressure closing valve is formed by a shell, a piston, a seal ring, a spring, a connecting soft tube and a base; the positive-pressure closing valve and a liquid out plug separated structure do not involve the indwelling needle, are easy to operate, can reduce pain, and avoid the indwelling needle from taking off; the puncture needle protection sleeve can protect the puncture needle before and after the use of the indwelling needle, has the advantages of without added length, small and exquisite volume, good hand feel, accurate control, high puncture precision, and convenience for puncture operation and the like, can automatically retract to protect the puncture needle, can avoid acupuncture injury on medical workers, has positive pressure closing function, can prevent venous blood flowing back and overflowing, prevent blood from being polluted and avoid the blood from forming blocking in the indwelling needle, does not need heparin tube closing and other operation, has needless connection function, and can avoid needle injury, improve working efficiency and protect the safety of medical workers and patients.

A non-invasive apparatus for rehabilitating a joint, limb, and muscles of a patient recovering from surgery on the joint, includes a continuous passive motion device having at least one support member for supporting the limb, at least one hinge coupled to the at least one support member, and at least one actuator for providing reciprocating motion of the at least one support member about the at least one hinge, a plurality of electrodes transmitting at least four modalities chosen from a group consisting of functional electrical stimulation (FES), transcutaneous electrical nerve stimulation (TENS), temperature therapy stimulation, deep vein thrombosis (DVT) prophylactic stimulation, venous blood flow monitoring, and pain monitoring, and a control unit controlling the at least one actuator and the plurality of electrodes according to a coordinated sequence of the reciprocating motion and transmission of the at least four modalities.

Systems and methods of enhancing cardiopulmonary circulation in a subject during resuscitation are provided. A signal is received responsive to an induced heart compression that is applied to the subject, for example during ventricular fibrillation, an asystolic condition, or cardiac arrest. Responsive to receipt of the signal, a muscle distal subject's heart is electrically stimulated to contract and expel blood into the venous blood flow toward a heart of the subject.

An apparatus 40 for enhancing venous blood flow through a limb of a subject includes a detachable compression sleeve 41 extendable around the subject's limb and having a plurality of compressors 43-48 situated next to one another along the sleeve 41. In use, the compressors 43-48 substantially encircle the limb and compress the limb in a continuous cyclical compression sequence to move blood within the limb from the distal end of the sleeve 41 to the proximal end to replicate venous blood flow and to prevent backflow. In particular, as a said first compressor begins to compress the limb, a said second compressor preceding the first compressor in sequence already compresses the limb and continues to compress the limb at least until the first compressor compresses the limb to substantially the same extent as the second compressor, and a said third compressor which precedes the second compressor in sequence ceases to compress the limb.

The invention provides a portable pneumatic massager capable of resisting deep venous thrombosis of lower limbs, and relates to the technical field of rehabilitation instruments. The portable pneumatic massager capable of resisting deep venous thrombosis of the lower limbs comprises two sleeve cylinders which are bilaterally symmetrical, wherein a circle is slidably connected with and arranged ineach sleeve cylinder; an air bag is placed in each circle; sliding blocks are slidably connected with and arranged in each circle; an extrusion rod is fixedly connected with and arranged in each sliding block through a first spring; and a rolling ball is connected with and arranged at one side, close to the center of a circle, of each extrusion rod in a rolling mode. The portable pneumatic massager capable of resisting the deep venous thrombosis of the lower limbs has the following advantages: the effect of improving the hysteresis of a venous blood flow is achieved; the formation of the deepvenous thrombosis is prevented; the portable pneumatic massager can be applicable to patients with different leg sizes; the effect of relieving a deep venous blood flow is improved; the production cost of the massager is reduced; meanwhile, the portable pneumatic massager is small in size and light in weight; and the portable pneumatic massager is convenient to carry by adoption of the combined design of the sleeve cylinders and a treading seat.

The disclosed invention aids the treatment of vascular problems with blood circulation in the body extremities by mechanically increasing or assisting the venous blood flow and prevents or minimizes shock through the application of controlled external pressure. In an alternate use, the device can also he used to compress a limb wound to reduce loss of blood in accidents and injuries during military operations. The invention comprises of two inflatable air bladders with a switchable filling valve to enable inflation of both bladders simultaneously or separately. The invention is inflated by either air or liquids for compression, fillable by mouth or hand pump, with the level of compression controllable by the user or installer. The invention is of reduced weight, allows as of manufacture and is of low cost. The invention is highly portable arid storable for battlefield or ambulance emergency care uses, flexible, easily and quickly installed.

A technique is disclosed for determining blood flow in a living body by changing the thermal energy level in the venous blood flow path and determining temperatures in both the venous and arterial blood flow paths. Blood flow is calculated as a function of the change in energy level and the temperature differences in the venous and arterial blood flow paths.

System, device and method for providing neuromuscular electrical stimulation (NMES) to muscles of foot. The device includes an electrical signal generator for producing a wave pattern of variable frequency, duration, intensity, ramp time and on-off cycle. Device further includes surface electrodes for being positioned over the foot muscles or around ankles and attached to signal generator. Signal generator is programmed to stimulate the foot muscles and nerves. Location of the electrodes and the programming are adjusted to reduce pooling of the blood in the soleal veins of the calf and enhance venous blood flow to prevent deep vein thrombosis (DVT), to enhance venous blood flow for the post-thrombotic syndrome patient, to expedite wound healing, to reduce neuropathic pain of the foot and ankle, chronic musculoskeletal pain of the ankle and foot, and acute post-operative foot and ankle pain, and to prevent muscular atrophy of the foot muscles.

A dual blood flow monitoring system includes an electronic first sensor, an electronic second sensor, and an electronic monitoring device in communication with the first sensor and the second sensor. The first sensor monitors a first blood flow and the second sensor monitors a second blood flow. The electronic monitoring device is operative to receive signals from the sensors and to calculate and display a differential value representing a difference between the at least one parameter of the first blood flow and the at least one parameter of the second blood flow. A dual blood flow monitoring system is provided in a method for simultaneously monitoring extracorporeal arterial and venous blood flows, in which the sensors are placed in communication with respective tubing lines carrying the arterial and venous blood flows.

The invention discloses an arterial-venous blood flow divider capable of controlling blood pressure fluctuation quickly and effectively in real time. The blood flow divider can divide the arterial blood flow to the vein when the blood pressure rises so as to prevent further rise of the blood pressure and achieve an aim of controlling the blood pressure fluctuation. The blood flow divider comprises a tubular component and a flow control component, wherein the flow control component is arranged in the tubular component; a through hole along the axial direction of the tubular component is formed in the flow control component; the size of the through hole changes in real time along with the magnitude of pressure, and the blood flow rate changes in real time along with the size change of the through hole; if the through hole becomes larger, the blood flow rate increases along; and if the through hole becomes smaller, the blood flow rate decreases along. Furthermore, the through hole has an open threshold; when the blood pressure is lower than or equal to the threshold, the through hole is kept in a minimum state; and when the blood pressure is higher than the threshold, the through hole becomes larger to be opened.

An extracorporeal reservoir device including a housing, a venous inlet sub-assembly, and a venous filter. The venous sub-assembly is mounted to the housing and includes a downtube and a luer port connector body. The connector body extends from the downtube and forms a passageway open to a lumen of the downtube. The connector body is arranged such that fluid flow from the passageway merges with a flow path of fluid along the primary lumen at an angle of less than 90°. Secondary blood flow through the port connector body is less likely to induce turbulent flow into venous blood flow within the downtube, and is thus less likely to break up any bubbles carried by the venous blood. For example, at port flow rates of less than 500 mL/minute, fluid flow from the port connector body does not induce turbulent flow into fluid flowing through the primary lumen.

Provided is a technique for deriving a mathematical function for defining arterial and venous blood flow in the body by using a four-dimensional medical image. A method of analyzing blood flow by using a medical image according to an embodiment of the present disclosure includes: determining a position of a blood vessel from four-dimensional medical image data that is obtained by combining data of three-dimensional medical images of a patient's body captured at a preset period; deriving a primary function for an arterial input function and a venous output function by using a vascular signal in a head region and a vascular signal in a heart region from among vascular signals included in three-dimensional medical image data for the position of the blood vessel determined in the determining; and deriving a secondary function that is a final function for the arterial input function and the venous output function by using the primary function and a vascular signal in a neck region.

The invention discloses medical equipment for treatment of microcirculation diseases. The equipment includes a blood rheology detector, a resonance pool, magnetization coils and a control system. Ultrasonic wave of specific amplitude is transmitted to foot blood vessels through liquid to depolymerize erythrocyte rouleau flowing through the blood vessels, thus improving erythrocyte deformability, and also magnetization is carried out on venous blood flowing through legs, thus reaching the purpose of treating microcirculation diseases. The invention has the beneficial effects that: microcirculation disturbance is the source of all diseases, the therapeutic equipment for microcirculation diseases provided by the invention can break red blood cell aggregation in blood, improve red blood cell deformability, and reduce blood viscosity. The therapeutic equipment has the characteristics of fast and efficient use and low cost, thus providing treatment equipment for prevention and treatment of diseases caused by diabetes, high blood pressure, stroke, myocardial infarction and other microcirculations.

The use of hyaluronic acid and physiologically acceptable salts thereof as drag reducing agents is described. The compositions of the invention can be used to increase aortic blood flow, increase arterial blood flow, increase venous blood flow, decrease blood pressure, decrease peripheral vascular resistance, diminish the development of atherosclerosis, and/or prevent lethality of hemorrhagic shock.