48 results about "Venous blood sample" patented technology

Disclosed herein is a fully-integrated, disposable biochip for point-of-care testing of clinically relevant parameters. Specifically, in accordance with an embodiment of the present invention, the biochip is designed for POCT (point-of-care-testing) of an array of metabolic parameters including partial pressure of oxygen, Glucose, and Lactate concentration from venous blood samples. The biochip is fabricated on a low-cost plastic substrate using mass manufacturing compatible fabrication processes. Furthermore, the biochip contains a fully-integrated metallic micro-needle for blood sampling. The biochip also uses smart passive microfluidics in conjunction with low-power functional on-chip pressure generators for microfluidic sequencing. The design, configuration, assembly and operation of the biochip are ideally suited for a disposable biochip specifically targeted towards POCT applications.

The invention involves a device and method for ascertaining the functioning of the respiratory system and, in particular, determining the cardiac output of a patient. The device comprises an apparatus containing sensors for measuring the oxygen and carbon dioxide concentrations as well as the volume of air inhaled and exhaled by a patient. The patient is provided a mouthpiece for breathing into and out of the device, which subsequently measures oxygen partial pressures of the inhaled and exhaled air. In addition, the patient's arterial oxygen saturation is continuously measured through pulse oximetry and the pH and hemoglobin concentration is determined from a venous blood sample. From this data, the cardiac output of the patient may be calculated.

The invention discloses a vein blood sample shaking up device for a clinical laboratory of a hospital. The vein blood sample shaking up device comprises a base, a guide rod, a screw rod, a hoisting block, an arc-shaped clamping claw, a shaking up platform, a rectangular translation frame, a driving motor, an incomplete gear and a fixed sleeve ring, and is characterized in that the hoisting block is mounted on the screw rod through a thread; a clamping force arm is fixedly mounted at the right end of a shaft sleeve through a connecting rod; gears are arranged at front and rear sides in the rectangular translation frame; the gears in the rectangular translation frame are adaptive to a gear on the incomplete gear; the fixed sleeve ring is fixedly connected to the rear side of the rectangular translation frame trough a connecting rod. According to the vein blood sample shaking up device disclosed by the invention, a test tube is indirectly driven by manually rotating a shaking up wheel to move downward into the fixed sleeve ring, so that the shaking up of blood collection tubes with different lengths is met and the commonality of the shaking up device is improved; the incomplete gear is matched with the rectangular translation frame so that the fixed sleeve ring moves leftward and rightward and the blood collection tubes are driven to swing leftward and rightward, and furthermore, the shaking up effect of vein blood is improved.

The present invention is directed to holders for a sensor. The holders apply pressure to the sensor to prevent a venous blood signal without dampening the arterial blood signal and are optically opaque to shield ambient light from reaching the sensor.

The invention relates to an intelligent venous blood sampling positioning device based on computer vision. The blood sampling positioning device comprises a medical disinfection spraying module A, a computer vision module B, a core-x-y motion module C, a control module D, a supporting frame E, a computer and a bottom plate. A support frame E is fixed on one side of the bottom plate, and a computervision module B is fixed above the support frame E; a medical disinfection spraying module A and a core-x-y motion module C are respectively fixed on the other side of the bottom plate from left to right; the control module D is mounted on the bottom plate below the core-x-y motion module C; a blood sampling positioning part can freely move in the plane to reach a blood sampling point specified by a computer, and the venous blood sampling positioning task is efficiently and accurately completed.

The invention provides an anti-reverse-flow valve device for collecting venous blood samples and a blood collecting needle device, and relates to the technical field of medical instruments. The bloodcollecting needle device comprises a venous blood collecting needle, a tube plug puncture needle and a connecting part connected with the venous blood collecting needle and the tube plug puncture needle, and the connecting part is provided with the anti-reverse-flow valve device for collecting the venous blood samples; the anti-reverse-flow valve device comprises a first connecting base with a through hole in the middle, an elastic anti-reverse-flow valve installed on the first connecting base and a second connecting base cooperating with the first connecting base to form a cavity for containing the elastic anti-reverse-flow valve; the second connecting base is clamped to the first connecting base; the second connecting base is provided with a through hole communicated with the exterior, collected blood can be effectively prevented from reversely flowing into the human body, and the situation is avoided that blood contaminated by bacteria enters the human body and causes damage to thehuman body. In addition, the aseptic treatment on a whole blood collecting container can also be omitted, and the cost can be saved.

The invention belongs to the technical field of medical equipment, in particular relates to a portable electronic uniform-mixing instrument of venous blood sampling anticoagulation test tube blood samples, and mainly solves the problems of high hemolysis rates of blood samples, high work intensity of nurses and low efficiency existing in manual shaking of collected venous blood samples clinically. The portable electronic uniform-mixing instrument of the venous blood sampling anticoagulation test tube blood samples comprises a shell, and further comprises a power supply part, a motor, a delay adjustment potentiometer, a power switch and a test tube gripper, wherein the motor is arranged at the upper part of the shell, the test tube gripper is arranged outside the shell and connected with a rotating shaft of the motor, the power supply part is arranged at the lower part of the shell and connected with the motor and the delay adjustment potentiometer, the delay adjustment potentiometer is arranged in the shell and connected with the motor to adjust the rotating speed and the rotating time of the motor, a delay adjustment button is arranged on the shell and connected with the delay adjustment potentiometer, and the power switch is connected with the power supply part.

The invention relates to a blood pressure measuring method. The blood pressure measuring method comprises the steps of using a sample adding capillary fluid viscosity measuring device, an automatic control circuit based on a microprocessor and matching programs; injecting the processed to-be-measured blood sample into a sample pipe, and completely separating erythrocyte and plasma; starting the sample adding capillary fluid viscosity measuring device, and collecting first height position data in time when the bottom end of a sample adding probe contacts the liquid level of the plasma; starting an injection pump to extract the plasma at the constant speed, collecting pressure signals corresponding to the plasma viscosity in real time, and collecting second height position data in time when the bottom end of the sample adding probe contacts the liquid level of the erythrocyte; and calculating the blood pressure results of the venous blood sample by the microprocessor according to the first height position data and the second height position data.

The invention discloses a gene detection method for communicating hydrocephalus. According to the method, a venous blood sample of a to-be-tested patient is directly used as an analysis sample. The method comprises the following steps: (1) extracting RNA; (2) performing fluorescent PCR (polymerase chain reaction) amplification; (3) performing fluorescent amplification; and (4) performing result analysis. The detection method disclosed by the invention is simple to sample, is high in sensitivity and strong in specificity, can be used for early diagnosis, and is of great significance for carrying out early warning on communicating hydrocephalus patients and taking effective treatment means.

A methodology for converting venous blood values to arterial blood values provides the advantage of obviating the need for taking arterial blood samples. The method entails (i) measuring arterial oxygenation, (ii) measuring and estimating values of venous blood acid / base status and oxygenation status of a venous blood sample, and (iii) converting the venous blood values by applying a mathematical model for deriving blood acid / base status and oxygenation status into estimated arterial blood values.

The invention relates to a method for separating and purifying fetal nucleated erythrocytes, which is characterized by comprising the following steps: lysing the anucleated erythrocytes in the peripheral venous blood samples of pregnant women; adding a cell immobilization reagent to the lysed blood samples; and Cell separation is performed on a cell-fixed blood sample to obtain fetal nucleated red blood cells. The invention also relates to a kit for separating and purifying fetal nucleated red blood cells from peripheral venous blood samples of pregnant women. The invention greatly improves the yield and purity of isolated target cells, and lays a good foundation for subsequent various analyses.

The invention provides a disposable collection needle capable of synchronously collecting multiple tubes of venous blood samples, comprising a connecting seat, the bottom of the connecting seat is provided with a diversion hole communicating with the puncture needle, and the inside of the connecting seat is rotatably connected with a sealing plate, the sealing plate The outer side of the adjustment plate is connected with a swivel ring, the front of the adjustment plate is provided with tooth segments corresponding to the teeth, the inside of the fixed pipe is movably inserted with a positioning rod inserted into the inside of the adjustment plate, and the outer side of the positioning rod is fixedly connected with a floating plate. The suction component pumps air from the connecting seat and the puncture needle, and the floating plate drives the positioning rods to move up under the action of the suction force. After all the positioning rods leave the positioning grooves, the adjustment plate will move under the action of the spring and pass through the teeth. The segments and teeth drive the swivel to rotate, and the swivel drives the sealing plate to rotate through the connecting plate, so that the diversion hole is opened. By setting the positioning rod and the sealing plate, the suction force in each puncture needle is guaranteed to be consistent, thereby ensuring Consistent synchronization of blood sampling across multiple needles.