77 results about "Venous blood sampling" patented technology

The invention relates to a venous blood collection robot, comprising an arm rest; a full-automatic recognition positioning device and a mechanical drive mechanism connected with a clamping device that clamps a blood collection needle are arranged above the arm reset, the lateral side of the arm rest is provided with an intelligent navigation vessel-recognizing device, and the front of the arm rest is provided with an automatic vein presser. The venous blood collection robot is capable of preventing operational errors due to manual operation, reducing blood collection difficulty and relieving the pain of a person under blood collection.

The invention discloses a full-automatic venous blood sampling device which comprises a syringe needle positioning mechanism, a blood sampling point identifying and treating mechanism connected to the syringe needle positioning mechanism, and an arm fixing positioning mechanism and a needle replacing mechanism arranged on the syringe needle positioning mechanism. The syringe needle positioning mechanism comprises a lead screw transmission assembly, a ballscrew assembly and a three-degree-of-freedom mechanical arm. The lead screw transmission assembly comprises a fixed support and a stand column connected to the fixed support in a sliding mode. The ballscrew assembly is connected to the stand column and the three-degree-of-freedom mechanical arm, and used for driving the three-degree-of-freedom mechanical arm to move left and right. The three-degree-of-freedom mechanical arm comprises a fixing plate, a second mechanical arm body, a first mechanical arm body and a slide block, wherein the two ends of the first mechanical arm body are rotatably connected with the fixing plate and the second mechanical arm body correspondingly, the slide block is connected to the second mechanical arm body in a sliding mode, and a syringe needle is arranged on the slide block.

The invention discloses a disposable anti-pricking venous blood sampling needle which comprises needle sheath, a venous needle tube, a needle handle, a fine hose, a needle seat, a puncture needle seat, a blood sampling needle tube, a rubber sheath and an anti-pricking sheath. The venous needle tube, the needle handle, the fine hose and the needle seat are sequentially connected via adhesive, the puncture needle seat and the blood sampling needle tube are adhered via adhesive, the needle sheath is sleeved on the needle handle, the puncture needle seat is connected in the needle seat in a screwed manner, and the rubber sheath protects the blood sampling needle tube therein and is sleeved at the other end of the puncture needle seat in a clamped manner. The disposable anti-pricking venous blood sampling needle is characterized in that the anti-pricking sheath is sleeved on the fine hose in a clamped manner and can slide on the fine hose back and forth, two sides of the anti-pricking sheath are folded in a pressed manner and then are fastened, after fastening, the rear of the anti-pricking sheath forms a closed ring, and a tortuous slot is axially formed on the side wall of the front of a fastener. After the needle is withdrawn, only the needle handle is required to be pulled back into the anti-pricking sheath, and the problem that the needle with blood accidentally pricks others to cause infection can be avoided, so that protection to medical staff is strengthened.

The invention discloses a reagent kit for measuring the content of C-reactive protein in whole blood and a measuring method thereof. The reagent kit comprises a reagent 1 and a reagent 2, wherein the reagent 1 comprises a surfactant and a proper amount of buffer solution, and the content of the surfactant is 0.1-3g / L; and the reagent 2 comprises polystyrene latex adsorbed with a C-reactive protein antibody and a proper amount of buffer solution, and the content of the polystyrene latex adsorbed with the C-reactive protein antibody is 0.5-3g / L. The measuring method comprises the following steps of: collecting a whole blood sample of a subject, uniformly mixing the reagent 1 and the whole blood sample, then adding the reagent 2 for uniformly mixing, detecting the absorbance and the scattering light intensity of a reaction system at 625-800nm, and computing the content of the C-reactive protein in the whole blood by contrasting a standard curve. In the reagent kit and the measuring method, the whole blood of the subject can be used as a measured sample, the operation is simple, and results are accurate. The invention relieves the pain of the subjects, particularly for the child and newborn subjects and the subjects with more difficult vein blood collection, such as patients with large-area burns, and the like.

The invention belongs to the technical field of medical equipment, in particular to an automatic blood collection and automatic transfusion nursing bed. It includes nursing institutions, The main cantilever mechanism and the auxiliary cantilever mechanism arranged on both sides of the nursing mechanism and the functional platform arranged on the main cantilever mechanism or the auxiliary cantilever mechanism are provided with a guide rail, a driving device and a rotating device, and the functional platform comprises an arm fixing mechanism, a needle holding mechanism and a needle positioning mechanism. The main cantilever mechanism and the auxiliary cantilever mechanism are provided with a guide rail, a driving device and a rotating device. The automatic blood collection and automatic transfusion nursing bed of the invention, through the cantilever mechanism to realize the rough positioning of the needle entry point, Then the needle insertion point is accurately positioned by the nearinfrared image processing module and the ultrasonic module, and the needle insertion operation is completed by the linkage control of the injection mechanism, so as to realize the venous blood sampling or venous injection function, which has the characteristics of high venous puncture quality, simultaneously realizes the simultaneous operation of multiple nursing beds, reduces the workload, and ensures the blood sampling and medication time.

The invention discloses an instant vacuum venous blood-sampling method and special equipment. A closed negative-pressure blood-sampling system is formed by a miniature variable-speed peristaltic pump, a miniature electromagnetic valve, a bidirectional blood-sampling needle, a test tube with a special test tube plug and a closed test tube rack. The instant vacuum venous blood-sampling method comprises the following steps of: inserting the test tube with a plug into the test tube rack and tightly pressing the tube plug; then, puncturing a plug-puncturing needle of the bidirectional blood-sampling needle into the test tube plug, puncturing the other end into vein, starting a peristaltic pump and forming a vacuum environment between the interior of the test tube rack and the test tube; forming a negative pressure in the test tube through an air hole of the test tube plug and pumping blood into the test tube; and adding auxiliary blood-sampling equipment so as to conveniently sample blood. The invention solves various problems existing in a vacuum blood-sampling system, has the advantages of simpleness, convenience, practicability, economy and high efficiency and is suitable for popularization and use in various big hospitals and primary healthcare departments.

The invention provides an automatic arm binding strap control device for venous blood sampling. The automatic arm binding strap control device for venous blood sampling comprises an operating box installed on a movable supporting leg frame. A movable seat for seating a blood sampling operator and a movable seat for seating a person with blood to be sampled are arranged at the rear end and the front end of a box bottom plate of the operating box respectively. The person with blood to be sampled is seated on the corresponding movable seat and places one arm in an elastic binding strap of a tensioning controller from one side of the semicircular box wall of the operating box, wherein the elastic binding strap stretches out from a binding strap slit in the upper side of an operating platform; a computer controller is arranged at the rear end of the operating box and controls a transmission controller to drive the tensioning controller through a data line, and the elastic binding strap where the arm of the person with blood to be sampled is placed is automatically tensioned to a suitable tightness degree, so that venous blood is prevented from flowing back, the vein of the arm of the person with blood to be sampled is exposed, and then blood sampling is completed. The automatic arm binding strap control device has the advantages that the arm binding strap control device with the automatic detection and tightness degree control functions is developed, batched blood sampling is conveniently, rapidly and safely completed, and problems existing in blood sampling are solved.

The invention discloses a multifunctional device for venous blood collection, and belongs to the field of blood drawing devices. The multifunctional device for venous blood collection comprises an armbracket and a blood collection tube bracket, wherein the arm bracket and the blood collection tube bracket are vertically distributed and are detachably connected; the blood collection tube bracket comprises a blood collection tube frame and a base, the blood collection tube frame is transversely and slidably connected to the base, a transmission mechanism used for driving the blood collection tube frame to transversely move on the base and a jacking mechanism used for driving the blood collection tube to vertically move on the blood collection tube frame are arranged on the base, the arm bracket comprises a supporting plate, the supporting plate is connected with a holding air bag, and the holding air bag, the transmission mechanism and the jacking mechanism are connected in sequence; and a tourniquet is further connected to the supporting plate. The multifunctional device can solve the problems that in the existing blood drawing operation process, various tools are dispersed, and the efficiency is affected by the weak mutual connection.

The cell separating and storing method is to take healthy and active cell out of body and to freeze store after separation, activation and proliferation, so as to provide effective, safe and reliable disease preventing and treating material. Specifically, the lymphocyte freezing and storing method includes the steps of: for the donor to apply, to exam the blood of the donor, to collect venous blood, to separate lymphocyte from venous blood via a density centrifuging process, to activate and culture lymphocyte, to collect active lymphocyte, to freeze and store lymphocyte, and to defreeze before use.

The invention belongs to the technical field of machine vision and medical instruments and discloses a venous blood sampling needle inserting point automatic extraction method based on vision. The method comprises the following steps of carrying out whole skeleton extraction on venous bifurcations in a binary image, thereby obtaining an image containing a venous bifurcation center line, further obtaining intersection points of the venous bifurcations, and moreover, recording the coordinates of the intersection points of the venous bifurcations; carrying out partial skeleton extraction on the venous bifurcations in the binary image, thereby obtaining a partially refined image; processing the partially refined image according to the obtained coordinates of the intersection points of the venous bifurcations, carrying out statistics on the number of valid points of each intersection point in a preset length range of the midpoint of the intersection point column by column from the venous proximal part corresponding to the orientation of the intersection point, and further obtaining a length count value corresponding to each intersection point, wherein the interaction point corresponding to the venous bifurcation with the maximum length count value is the venous blood sampling needle inserting point. According to the method, the needle inserting point is extracted automatically and the precision and efficiency are improved.

The invention discloses an intelligent vein blood collection pad for medical examination. The pad comprises a blood collection pad body, a base rubber anti-skid pad, an unused blood collection pad storage device, a blood collection pad recovery device, a U-shaped soft material support pad and an arm tightening device, the pad can meet the requirement of one person with one pad, a surface skin protection pad of the U-shaped soft material support pad can be disassembled for cleaning and disinfecting, which can effectively reduce microbial growth and avoid cross-infection of diseases, the arm tightening device above the blood collection pad replaces an occluding cuff, which can automatically tighten the arm of a patient, when the weather is cold, the blood collection pad can be heated to reduce the patient's discomfort and reduce the difficulty of blood collection, and the whole intelligent vein blood collection pad has high automation degree and simple and convenient operation, reduces the work intensity of the medical staff, improves the work efficiency, and is beneficial for popularization and promotion.

The invention relates to the technical field of medical apparatuses and instruments, in particular to a quantified blood sampling system. The system comprises a vein blood sampling needle, a negativepressure blood sampling pipe and a quantified blood sampling regulating device. The quantified blood sampling regulating device comprises a shell, an installing groove for vertical installation of a negative pressure blood sampling pipe is formed in the side wall of the shell, a cavity is formed inside the shell, an electromagnet is fixedly arranged at the bottom of the cavity, a permanent magnetis arranged above the electromagnet, an elastic piece is arranged between the permanent magnet and the top of the cavity, a sliding groove is formed in the side wall of the installing groove, the sliding groove is communicated with the cavity, a liquid level detecting assembly for detecting the liquid level of the negative pressure blood sampling pipe is in sliding connection with the side wall ofthe installing groove, the liquid level detecting assembly is fixedly connected with the permeant magnet through a connecting piece, the connecting piece is in sliding connection with the sliding groove, a quantified blood sampling controller is arranged on the shell, the quantified blood sampling controller is used for setting a set value of the blood sampling amount, and the position of the liquid level detecting assembly in the sliding groove is controlled through the electromagnet. Accurate quantified blood sampling can be achieved.

The invention relates to a dripping-proof backflow-blood-observable venous blood taking needle, which can improve the accuracy of blood taking amount, prevent dripping after blood taking, conveniently observe backflow blood and effectively prevent cross contamination caused by blood dripping, and ensure accurate blood taking amount. The blood taking needle consists of far-end component and a near-end component which are fixedly connected, wherein the far-end component comprises a far-end needle seat with a far-end needle seat cavity and a far-end needle tube fixed on the far-end needle seat, and the upper end of the far-end needle tube is communicated with the far-end needle seat cavity; the near-end component comprises a near-end needle seat with a near-end needle seat cavity and a near-end needle tube fixed on the near-end needle seat; a wet-closing member is arranged between the far-end needle seat cavity and the near-end needle seat cavity and separate the far-end needle seat cavity from the near-end needle seat cavity, and the lower end of the near-end needle tube passes through the wet-closing member and extends into the far-end needle seat cavity; and the far-end needle seat and the near-end needle seat are made of transparent or semitransparent material.

The invention provides a method for detecting a ToRCH10 item antibody based on filter paper dried blood spots. The method includes the following steps that blood slices with the diameter of 2-4 mm are obtained from the filter paper sheet dried blood spots; the blood slices are re-dissolved with sample diluent, and re-dissolved samples are prepared; the re-dissolved samples are measured through a streaming fluorescence radiation method. According to the method for detecting the ToRCH10 item antibody based on the filter paper dried blood spots, an IgG antibody or an IgM antibody is measured through the combination of a dried whole blood filter paper method and the streaming fluorescence radiation method, the problem that the needed sample size is large in an existing detection method is solved, the needed sample size is reduced, harm to the human body is small, the samples are convenient to save and transport, especially, when objects are newborns, no venous blood sampling is needed, and sampling is more convenient.

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.

An indwelling needle for venous blood collection comprises an indwelling needle. A side wall of an indwelling tube is communicated with an injection portion through a hose; at least one injection port is arranged on the injection portion; sealants are disposed at the rear portion of the indwelling tube; an indwelling sleeve is mounted at the head portion of the indwelling tube; a blood needle passes through the sealants of the rear portion of the indwelling tube and extends out of the indwelling sleeve; the blood needle is communicated with a blood guiding needle. With the indwelling needle for the venous blood collection comprising the specially designed indwelling tube and the blood needle, blood collection operation is realized without affecting liquid injection; with a further optimized indwelling needle provided with a flow limiter, liquid flow is limited, and structure is more compact.

The invention relates to the field of medical instruments, and particularly relates to a disposable anti-needlestick venous blood sampling needle which comprises a blood sampling needle base, a bloodsampling needle tube, a needle sheath, a hose, a hose base and a cork puncture needle, wherein the blood sampling needle tube is mounted on the blood sampling needle base; the needle sheath sleeves the blood sampling needle base; two ends of the hose are respectively connected with the blood sampling needle base and the hose base; the other end of the hose base is connected with the cork punctureneedle; the disposable anti-needlestick venous blood sampling needle further comprises a freely slidable anti-puncture device sleeving the hose and a protection cover connected to the cork puncture needle; the anti-acupuncture device is a hollow tube body; a clamping groove and a track groove are arranged in a tube wall of the anti-needlestick device; and a limiting projection is arranged at a joint of the clamping groove and the track groove. The disposable anti-needlestick venous blood sampling needle provided by the invention can effectively avoid needlestick injuries and eliminate infection of blood-borne diseases, and has advantages of high safety and reliability, simple production process, easy assembly and low production cost.

The invention discloses a laparoscopic venous blood taking needle. The laparoscopic venous blood taking needle comprises a medical injector connector, a medical silica gel connecting tube and an operating handle. The laparoscopic venous blood taking needle is characterized in that a medical transparent protective sleeve tube with the upper end opened is arranged above the operating handle, a fixing ring is arranged in the lower end of the protective sleeve tube, and a hollow needle used for taking blood is further arranged in the protective sleeve tube; the upper end of the hollow needle is provided with a hook bending downwards, the hooked needle is arranged near the portion below an opening formed in the upper end of the protective sleeve tube, and the lower end of the hollow needle penetrates through the fixing ring at the lower end of the protective sleeve tube and then penetrates through the lower end of the operating handle to enable the distance between the operating handle and the protective sleeve tube to be 5 cm; the tail end of the portion, penetrating through the lower end of the operating handle, of the hollow needle is connected with one end of the medical silica gel connecting tube, and the other end of the medical silica gel connecting tube is connected with the medical injector connector. The laparoscopic venous blood taking needle has the advantages that the structure is simple, manufacture is easy, blood taking can be conducted on a vein blood vessel in the abdominal cavity of a patient through an endoscopy, blood taking is convenient and safe, and medical accidents are reduced.

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 provides a venous blood collecting needle. The venous blood collecting needle comprises a blood collecting needle tube, a blood collecting needle tube seat and a blood feeding needle tube, wherein an inner cavity of the blood feeding needle tube is communicated with an inner cavity of the blood collecting needle tube seat. The venous blood collecting needle is characterized in that aflexible sleeve is sleeved outside the blood collecting needle tube, the top end of the sleeve is coated with the tip of the blood collecting needle tube, the bottom end of the sleeve is connected with a sleeve seat, and the sleeve seat is sleeved outside the blood collecting needle tube; the sleeve seat is connected with a sleeve seat handle, and the sleeve seat handle is provided with a contactpart; an elastic part is arranged between the sleeve seat and the blood collecting needle tube seat; when an external force is applied to the sleeve seat through the sleeve seat handle to drive the sleeve seat to move toward a direction approaching the blood collecting needle tube seat and force the elastic part to deform, the tip of the blood collecting needle tube is exposed from the top end ofthe sleeve; the contact part of the sleeve seat handle is pressed and fixed to the surface of the blood collecting needle tube seat to ensure that the elastic part cannot be restored; and after the tip of the blood collecting needle tube enters a vein, reducing the pressing force of a finger on the sleeve seat handle can force the sleeve seat to move away from the blood collecting needle tube seat, and finally the top end of the sleeve is coated with tip of the blood collecting needle tube.

The invention provides a venous blood sampling hemostatic patch for people with low blood platelets. The venous blood sampling hemostatic patch includes a main body pad; hemostatic cotton is fixedly connected to the bottom of the main body pad; the interior of an air cavity is filled with hemostatic drug powder; an end cap is arranged in a nozzle; a sliding plate is inserted into the main body padand located on the outer side of the nozzle in a sliding mode, a sharp head and a through hole are formed in the sliding plate, a baffle penetrating through the sliding plate is movably inserted intoa right connecting base, a rubber band is arranged at the top of a left connecting base, and bandages are fixedly connected to the sides, opposite to each other, of the two connecting bases. When venous blood sampling hemostasis is carried out on the patient with low blood platelets, the main body pad is placed on a puncture point wound, a pressing pad is pressed, then a handle is hooked and lifted upwards, the sliding plate is pulled by a stretching device to move leftwards, the sharp head punctures the end cap, air pressure in the air cavity blows the hemostatic drug powder outwards, hemostasis is carried out on the wound, the blood coagulation time is shortened, and thus the workload of the patient and medical staff is reduced.

The invention provides a wearable hand part infusion and blood collection simulation demonstration device, including a body, gloves and a liquid device. The body is provided with five layers which arethe bottom layer, the first simulation muscle layer, the simulation vascular layer, the second simulation muscle layer, and the simulation skin layer from bottom to top; the palm areas and the glovesare provided with corresponding first hook and loop fastener straps; and the liquid device is composed of a liquid storage bag, at least one liquid inlet pipeline and a liquid recycle bag, and the liquid inlet pipeline is provided with an adjustment switch. The wearable hand part infusion and blood collection simulation demonstration device has high practicability, can be used to simulate demonstration teaching and training of two skills of intravenous transfusion and venous blood sampling and drawing, and can flexibly change the thickness and route of blood vessels according to needs, by changing thicknesses of cotton cushions, the depth change of the positions of the simulation blood vessels can be realized, the clinical high simulation effect is achieved, and the operational change treating ability and the clinical thinking judgment ability of a learner are better improved.

The invention discloses a full-automatic venous blood sampling machine. The machine comprises a shell body, a moving device and a sterilization assembly are installed in the shell body, and the movingdevice is connected with a blood sampling assembly; a blood sampling assembly conveying window is formed in the side surface of the shell body, a control panel is arranged on the side wall of the shell body, and a contraction tourniquet is arranged on the outer wall of the shell body. The machine effectively solves the problems that according to an existing hospital, the venous blood sampling process is complicated, the professional skill requirement for nurses is high, and the labor intensity of the nurses is high, greatly reduces the risk that a patient feels painful due to puncture errors,can monitor the blood sampling process in real time and is simple and compact in structure, safe, practical and easy to popularize.

The invention relates to a collecting and handling device for a venous blood sampling needle. The device comprises a bottom plate, a mounting rack, a conveying mechanism and a collecting mechanism, wherein the mounting rack is mounted on the bottom plate, and the conveying mechanism is mounted at the lower end of the mounting rack; the collecting mechanism is arranged at the outer side of the conveying mechanism and comprises a rotating motor, a rotating block, a linear guide rail, a collecting branch chain and an assistant branch chain; the conveying mechanism comprises a driving conveying roller, a driven conveying roller, a driving motor, a conveyor belt and a conveying plate; the collecting branch chain comprises a connecting sliding block, a working plate, a cutting blade, a first collecting box and a second collecting box; and the assistant branch chain comprises an assistant motor, an adjusting block, a mounting sliding block, an assistant plate and a connecting frame. The device solves the problems such as that workers are handle each venous blood sampling needle and are easily injured by needle heads during handling and rubber parts are easily mixed with puncturing needleheads in current venous blood sampling needle collecting and handling process.

The invention discloses a miniature administration and blood sampling system of the jugular vein of a rat, comprising a cored screw with a base plate, a nut, a silicone tube, a fixation clamp, an absorbent pad, a catheter, a plug, a flat end needle and an injector. In the system, the nut is in threaded connection with the cored screw, round holes are formed around the base plate, the silicone tube is connected with the base plate through the round holes and is fixed through the fixation clamp, when in fixation, the silicone tube is in an x-shaped cross and passes through the chest of the rat, the base plate is fixedly arranged on the back part of the rat, and the position of the fixation clamp on the silicone tube is adjusted according to the rat individual, so that the base plate is fixed on the back part of the rat. The absorbent pad is arranged on the lower part of the base plate, is connected with the base plate through glue, and has the effects of hemostasis and anti-inflammation; the catheter is a biocompatible silicone tube, one end of the catheter is in the jugular vein of the rat, the other end of catheter is wound to the back part of the rat along the lower side of the neck skin of the rat, the top of the catheter is provided with a plug, and the catheter is arranged in the cored screw to be fixed. When the flat end needle and the injector are used for administrating and sampling blood to the rat, the plug is removed, and the flat end needle and injector are connected with the jugular vein through the catheter.

The invention discloses a method for jugular vein blood collection of a guinea pig. The method comprises the steps of 1) fixing the guinea pig; 2) shaving a blood collection portion; 3) collecting blood at a position of a jugular vein of the guinea pig; 4) after blood collection is finished, stopping bleeding. The blood collection method has the advantages that the operation is simple, the damage is small, blood is not prone to pollution and can be collected repeatedly and the like, and the method has a broad application value.

The invention discloses a protecting mechanism special for a vein blood lancet. The special protecting mechanism comprises a hollow return protecting cap with two opening ends, wherein a needle handleclamp strip connected with a needle clamp is arranged in a cavity of the return protecting cap, a non-return cap is arranged below the return protecting cap, and the bottom end of the return protecting cap is inserted into the non-return cap. The protecting mechanism is convenient to operate, and a main body structure is not changed, so that the problems of complicated operation instructions, inaccurate use, special use habits and the like do not need to be considered before use; the operation habit is not changed after use, and the simple design can be used for completely replacing common vein blood lancets and has wide applicability; the structure is simple, an added part is clamped to a blade part of the needle handle in a sleeving manner, the main body structure of the vein blood lancet is not changed, the risk is minimal, clinical safe return protection can be easily realized, and an adsorption material at the front end of the return protecting cap can absorb residual blood afterthe needle is drawn out, so that the complete protection is realized; and the mechanism is not in contact with the internal structure of the blood lancet, so that the consistency between the device and the blood lancet is not increased, and the toxicity risk is not increased.

The invention relates to intravenous infusion needles and intravenous blood sampling needles, in particular to a needle structure suitable for an intravenous infusion needle and an intravenous blood sampling needle. The needle structure comprises a soft plastic tube and a needle mounted at the end of the soft plastic tube. The needle comprises a needle tip and a needle stem. A self-destruction support is fixedly mounted in the middle of the soft plastic tube, and a needle storage cavity for storing the needle is formed in the self-destruction support. When the needle is turned over by using the tail end of the needle as a base point and embedded into the needle storage cavity, the soft plastic tube at the tail end of the needle is folded to seal the infusion hole of the soft plastic tube. A retaining piece for clamping the needle and stopping the needle from withdrawing is arranged in the needle storage cavity. By the arrangement, the needle structure has the advantages that the needle can be stored temporarily in the middle to prevent the needle from being infected by bacteria, liquid medicine leakage can be prevented during self-destruction, and the needle structure is simple to operate and free of potential safety hazards.