37 results about "Blood inflow" patented technology

A blood pump-oxygenator system (250A, 250B, 250C) for increasing perfusion and oxygen levels in the body of a patient (P), comprising: a blood inlet (80) and a blood outlet (90) connected to form a circuit operable as a cardiopulmonary bypass system suitable for extracorporeal treatment of the blood of the patient; a first blood pump (11) and a first oxygenator (20), wherein the first blood pump (11) is configured to deliver blood from the patient (P) through the circuit to the blood inflow port (80), through the first oxygenator (20), out of the blood outflow port (90) and back to the patient (P). The system further comprises a second blood pump (13) and a second oxygenator (21), wherein the second blood pump (13) is configured to deliver blood from the patient (P) through the circuit to the blood inflow port (80), through the second oxygenator (20), out of the blood outflow port (90) and back to the patient (P). The circuit comprises a first branch (101) and a second branch (102) arranged in parallel with each other, the first branch (101) accommodating the first blood pump (11) and the first oxygenator (20), and the second branch (102) accommodating the second blood pump (13) and the second oxygenator (21). The system further comprises a pump control unit (290) wherein the first and second blood pumps (11, 13) are configured to be controlled by the pump control unit (290) to increase or decrease the blood flow through the corresponding oxygenator (20, 21) by changing the proportion of the blood flow through the first and second oxygenator (20, 21).

The invention discloses an interventional sheath set, an interventional device and a sheathing canal, the interventional sheath set comprises an outer sheath and an inner sheath, and the outer sheath comprises an elastic sheathing canal extending in the axial direction of the outer sheath and a first passage defined by the elastic sheathing canal; a second passage extending in the axial direction of the inner sheath is arranged in the inner sheath, the outer sheath is arranged in the mode that when the inner sheath extends into the first passage, at least part of the elastic sheath tube expands and wraps the inner sheath extending into the first passage, and the second passage is communicated with the first passage; and when the inner sheath moves out of the first passage, the elastic sheath tube rebounds. The outer sheath comprises the elastic sheath tube, when the inner sheath intervenes into the first passage, the inner sheath enables the outer sheath to expand and wrap the surface of the inner sheath, the first passage is expanded, subsequent intervention of the interventional instrument is facilitated, after the interventional instrument reaches a designated position, the inner sheath is withdrawn, the elastic sheath tube rebounds and wraps the surface of the interventional instrument, and the interventional instrument is prevented from being damaged. The interventional diameter is reduced, and blood is prevented from flowing into the space between the elastic sheath tube and the interventional instrument to form thrombus.

The application relates to the field of medical devices, in particular to an implant capable of avoiding interlayer reflux, which comprises an anchoring device, a closing aid, and an adjusting mechanism, the closing aid is fixed on atrial tissue through the anchoring device, one end of the adjusting mechanism is connected with the closing aid, and the other end of the adjusting mechanism is fixed on ventricular tissue or apical tissue, the closing aid comprises a first patch and a second patch, one side of the first patch close to the anchoring device is a root, and the other side of the first patch away from the anchoring device is a head, wherein the first patch is arranged above the second patch, and the first patch and the second patch cooperate to form a pocket structure with an opening direction towards the head direction; the application can effectively avoid the existence of a gap between the closing aid and the autologous valve leaflet, so that blood flowing into the gap can be prevented from being accumulated into thrombus, calcified and other adverse conditions, and the application has good clinical significance.

This invention relates to the field of medical devices, and particularly to a novel tracheostomy occlusion device, comprising an operating table, a fixation plate, an adjustment mechanism, and an execution mechanism. This invention addresses the following problems encountered in the practical use of tracheostomy auxiliary retraction devices: prolonged holding of the retractor by the surgical assistant can cause soreness and lead to shaking of the retractor, which in turn can cause neck movement, affecting the normal progress of the surgery and potentially causing further trauma to the patient's trachea. Furthermore, it cannot effectively manage blood flowing from the neck, which may lead to blood entering the trachea and causing respiratory discomfort, even threatening the patient's life; the portion of the tracheostomy cannula inside the trachea obstructs the airway, affecting the patient's ability to cough up sputum and leading to inaccurate assessments of the patient's coughing ability; and it can easily cause blind sinus tracts to form at the tracheostomy site.

An intravascular blood pump (1) comprises a pump housing (2) having a blood inflow (21) and a blood outflow (22), and an impeller (3) arranged in the pump housing (2) to be rotatable about an axis of rotation, wherein the impeller (3) has blades (31) which are dimensioned and shaped for conveying blood from the blood inflow (21) to the blood outflow (22). The blood pump (1) further comprises a drive unit (4) for rotating the impeller (3), the drive unit (4) comprising a plurality of posts (40) arranged about the axis of rotation (10), wherein each of the posts (40) comprises a stem portion (41) and a head portion (42). Coil windings (470) around the posts are controllable in sequence to generate a rotating magnetic field. The drive unit (4) further comprises a back plate (50) which engages with the end (44) of the stem portion (41) of the posts (40) opposite the head portion (42).

The utility model relates to the technical field of vein blood sampling, in particular to an anti-backflow vein blood sampling device. The utility model provides an anti-backflow vein blood sampling device which can effectively prevent blood from flowing back and ensure normal blood sampling work. An anti-backflow vein blood sampling device comprises a needle head, a connecting piece, a needle wing, a connecting pipe, a fixing assembly and the like, the connecting piece is connected to the left portion of the needle head, the needle wing is connected to the upper side of the right portion of the connecting piece, the connecting pipe is connected to the left side of the connecting piece, and the fixing assembly capable of being fixed to an arm is arranged on the connecting piece. After blood flows into the control cylinder, the blood flows into the conical thin film and the hard tube, the conical thin film and the hard tube are kept in linear communication and then flow out of the collecting head, and after the blood stops flowing into the conical thin film, the hard tube droops under the action of gravity to block the conical thin film, so that the blood can be effectively prevented from flowing back; and the effect of normal blood sampling work is ensured.

An intravascular blood pump (1) comprises a pump casing (2) having a blood flow inlet (21) and a blood flow outlet (22), and an impeller (3) arranged in said pump casing (2) so as to be rotatable about an axis of rotation, wherein the impeller (3) has blades (31) sized and shaped for conveying blood from the blood flow inlet (21) to the blood flow outlet (22). The blood pump (1) further comprises a drive unit (104) for rotating the impeller (3), the drive unit (104) comprising a plurality of posts (140) arranged about the axis of rotation (10). Coil windings (47) around the posts are sequentially controllable so as to create a rotating magnetic field. The shaft portion (141) of each of the posts (140) comprises a soft magnetic material which is discontinuous in cross-section transverse to the longitudinal axis of the respective post (140).

The invention relates to an intravascular blood pump. The blood pump comprises a pump section having a proximal portion with a blood flow inlet and a distal portion with a blood flow outlet and an impeller for causing blood to flow into the blood flow inlet and towards the blood flow outlet. The blood pump further comprises at least one filter connected to the proximal portion of the pump section and arranged with respect to the blood flow inlet so as to filter the blood before it enters the blood flow inlet. The filter may comprise an expandable mesh structure made of a shape-memory material.

A filter device according to the present invention is to be mounted on a centrifugal separator and includes: a first space which is formed in a housing and into which blood flows; a second space which is formed in the housing and from which blood flows out; a partition wall that separates the first space and the second space and that is formed with a communication port establishing communication between the first space and the second space; and a white-blood-cell removal filter that is disposed in the second space. The first space is located between the partition wall and a first main surface of the housing, and the second space is located between the partition wall and a second main surface of the housing.

The utility model discloses a blood collecting and separating device which comprises a separating cup, the separating cup comprises a cup body, a cup cover, a static head, an upper cover and a lower cover, a blood inlet and a blood outlet in the top of the static head are both vertically arranged, and the upper cover and the lower cover are connected with the bottom of the static head; the upper end of the lower cover is communicated with the blood inlet to form a blood inflow channel, and a space between the inner walls of the upper cover and the lower cover is communicated with the blood outlet to form a blood outflow channel; the liquid inlet end of the blood inflow channel penetrates through the cup cover along the interior of the lower cover and extends into the bottom of the cup body; the liquid outlet end of the blood outflow channel penetrates through the cup cover to be located at the cup opening along the top of the cup body and enters the gap between the upper cover and the lower cover. By improving the structure of the static head, automatic assembly of the separation cup and a consumable pipeline during use can be facilitated, meanwhile, automatic assembly in the production process of the separation cup can be facilitated by improving the connecting structure between the static head and the upper cover and the connecting structure between the static head and the lower cover, and production efficiency is improved.

The application relates to the technical field of medical devices, in particular to a catheter pump assembly and a processing method thereof. The catheter pump assembly comprises a blood flow channel, a blood inflow cage and a blood outflow cage. The blood flow channel comprises a spring body support which is coiled by a shape memory alloy wire. The inner side of the spring body support is covered with an inner layer film, and the outer side is covered with an outer layer film. The two ends of the inner layer film and the outer layer film respectively extend to the two ends close to the spring body support, so that at least part of the spring body support is located at the connecting part of the blood flow channel, the blood inflow cage and the blood outflow cage. According to the technical scheme provided by the application, the connecting part of at least part of the blood flow channel, the blood inflow cage and the blood outflow cage is supported by the spring body support, thereby improving the bending resistance of the connecting part of the blood inflow cage, the blood outflow cage and the blood flow channel, overcoming the risk of breakage or falling of the connecting part, and ensuring the reliability of the catheter pump in use.

The invention relates to the technical field of medical instruments, in particular to a common carotid artery piercing sheath with an inflatable balloon, which comprises a first catheter and a second catheter, the first catheter is communicated with the second catheter, and the first catheter is used for being inserted into an artery and used for guiding blood in the artery to enable the blood to flow into the second catheter; a limiting assembly is arranged on the outer side wall of the first catheter and is used for inserting the first catheter into a blood vessel and blocking and closing the blood vessel; the tail end of the second catheter is connected with an adjusting assembly, and the other end, away from the first catheter, of the second catheter is connected with an external conveying pipe. The air bag is divided into a plurality of independent inflation cavities by the diaphragms, and can be inflated and expanded in a partitioned mode in sequence, so that the air bag can adapt to the shape of a blood vessel, uniform sealing attached to the wall of the blood vessel is achieved, and local compression or incomplete sealing caused by deviation of the air bag is avoided; suddenly impact of one-time overall expansion of a traditional air bag on the blood vessel wall is avoided through partitioned inflation, and the risk of injury or spasm of the endangium is reduced.

The utility model discloses a telescopic anti -blocking indwelling needle belongs to medical product technical field, including the catheter seat, the metal wedge is fixedly connected in the catheter seat, one end of metal wedge is fixedly connected with the flexible catheter, and the one end of flexible catheter is away from metal wedge and is penetrated to the front side of catheter seat, the isolation plug assembly is arranged in the catheter seat, and the isolation plug assembly is located the back of metal wedge, the rear portion of catheter seat is slidably connected with the telescopic push pipe of multiple sections, and the rear end of telescopic push pipe of multiple sections is penetrated to the back of catheter seat, the rear portion of telescopic push pipe of multiple sections is fixedly connected with silica gel gasket, and the rear end of telescopic push pipe of multiple sections is detachably connected with needle core seat, when the patient does not transfuse, the telescopic push pipe of multiple sections can retract to the catheter seat, and the blocking pipe is inserted into the flexible catheter and is completed to block, prevent the blood flow of patient to cause the blockage in the flexible catheter, shorten the length of whole indwelling needle simultaneously, and the paste fixing of patient's hand is convenient.

This invention relates to an intravascular blood pump, comprising a pumping device with a pump section and a drive section, wherein the pump section comprises a pump casing having a primary blood flow inlet and a primary blood flow outlet hydraulically connected by a primary passage and the drive section comprises a stator and a rotor rotatable about an axis of rotation and configured to rotate a primary impeller, the primary impeller being configured to convey a primary blood flow from the primary blood flow inlet to the primary blood flow outlet along the primary passage, the drive section further comprises an ancillary blood flow inlet and an ancillary blood flow outlet hydraulically connected by an ancillary passage extending through an axial gap between the rotor and the stator and an ancillary impeller arranged at a drive section end (DSE) of the rotor and rotatable about the axis of rotation along with the rotor, the ancillary impeller comprising one or more ancillary impeller vanes configured to convey an ancillary blood flow (ABF) from the ancillary blood flow inlet to the ancillary blood flow outlet along the ancillary passage in a direction toward a pump section end (PSE) of the pumping device, and the rotor is mounted in a blood-purged radial sliding rotor bearing with an inner rotor bearing surface and an outer rotor bearing surface, and the ancillary impeller forms the inner rotor bearing surface of the radial sliding rotor bearing.

The present invention relates to a dental drain tube, and more particularly, to a dental drain tube for oral use, and more particularly, to a dental drain tube for oral use, which can prevent blood accumulation of abscesses and infections in infected sites where abscesses such as abscesses and cellulitis are formed in dentistry, oral maxillofacial surgery or the like, and sites where swelling is expected to be severe after surgery. The present invention provides a drain tube for discharging to the outside, and discharges abscess, tissue or the drain tube from the most inconvenient position of post-operation discharge. The present invention relates to a dental oral drain tube capable of shortening the recovery time, for which the present invention extends in the longitudinal direction, has a radiation-impermeable line on either the outer surface or the inner surface, is inserted into a desired site of postoperative pain and swelling, fevers at a surgical site, and discharges to the outside. A channel extending along the length direction and providing channels for movement of pus, interstitial fluid or blood to prevent accumulation of interstitial fluid or blood; a drainage hole formed along the longitudinal direction of the main body and through which pus, interstitial fluid, or blood outside the main body flows into the channel; forming a plurality of groove lines on the outer surface of the main body to limit the moving direction of the main body; the method is characterized by including.

A blood pump-oxygenator system for increasing perfusion and oxygen level in a patient comprises a blood flow inlet and outlet forming a circuit operable as a cardiopulmonary bypass system for extracorporeal processing of blood, a first blood pump and first oxygenator. The first blood pump conveys blood through the circuit from the patient into the blood flow inlet, through the first oxygenator and out of the blood flow outlet back into the patient. The system further comprises a second blood pump and second oxygenator. The second blood pump conveys blood through the circuit from the patient into the inlet, through the second oxygenator and out of the outlet back into the patient. A pump control unit controls the first and second pumps to increase or decrease blood flow rate through the respective oxygenator to vary a ratio of flow rates of blood through the first and second oxygenators.

The invention discloses an anti-displacement artificial heart valve stent, and relates to the technical field of valve stents.The anti-displacement artificial heart valve stent comprises a stent body which is of a net-tube-shaped structure and comprises an inflow section, a transition section and an outflow section which are sequentially arranged in the axial direction, and a valve blade is arranged in the transition section; the end, away from the transition section, of the inflow section is an inflow end for blood inflow, and the end, away from the transition section, of the outflow section is an outflow end for blood outflow. In a natural state, the inflow end and the outflow end are gradually expanded outwards in the direction away from the transition section; the auxetic section is arranged between the transition section and the outflow section in the axis direction of the stent body; the auxetic section is of a geometrical structure with the negative Poisson's ratio characteristic, and when the auxetic section is subjected to axial impact force of blood, the auxetic section deforms to convert axial stretching displacement into radial expansion displacement. According to the present invention, the anti-displacement performance is excellent, the blood vessel is not damaged, and the long-term stability and reliability are provided.

The application relates to the field of medical devices, in particular to a repair device capable of avoiding interlayer reflux, which comprises a closing aid, an anchoring device for fixing the closing aid on atrial tissue, the closing aid comprises a first patch and a second patch, one side of the first patch close to the anchoring device is a root, one side of the first patch away from the anchoring device is a head, the first patch is arranged above the second patch, the first patch and the second patch cooperate to form a pocket structure with an opening direction towards the head direction, and the pocket structure is in a distraction state in a natural state. The application can effectively avoid the existence of a gap between the closing aid and the autologous leaflet, so that blood flowing into the gap can be prevented from being accumulated into thrombus, calcified and other adverse conditions, and has good clinical significance.

A blood pump comprises a pump casing having a blood flow inlet and a blood flow outlet connected by a passage, and an impeller arranged in said pump casing so as to be rotatable about an axis of rotation. The impeller is provided with blades sized and shaped for conveying blood along the passage from the blood flow inlet to the blood flow outlet, and is rotatably supported in the pump casing by a first bearing at a first axial end of the impeller and a second bearing axially spaced apart from the first bearing. The first bearing comprises a projection extending along the axis of rotation and connected to one of the impeller and the pump casing and a cavity in the other one of the impeller and the pump casing, the projection comprising an enlarged portion that engages the cavity such that the first bearing and the second bearing are arranged to bear axial forces in the same axial direction.

A filter device according to the present invention is to be mounted on a centrifugal separator and includes: a first space into which blood flows; a second space from which the blood flows out; a partition wall separating the first space and the second space; a communication port establishing communication between the first space and the second space; and a white-blood-cell removal filter disposed in the second space. The first space and the second space are arranged in a first direction intersecting a centrifugal direction, and the inlet port and the communication port are located between a center line along the first direction and a rotation center of the centrifugal separator.

The present invention relates to a blood pump (10), in particular intravascular blood pump. The blood pump (10) comprise a pump housing (12) having a blood flow inlet (14) and a blood flow outlet (16) connected by a passage (18), an impeller (20) disposed in said pump housing (12), and a drive unit (26) configured to drive the impeller (20). The pump housing (12) comprises a drive unit casing (22) and the drive unit (26) is disposed within the drive unit casing (22), wherein the drive (26) unit comprises a stator (66) and an insulation assembly (68), and wherein the insulation assembly (68) is configured to prevent electrical leakage.

The invention relates to the technical field of medical instruments, and discloses a catheter inlet window and device capable of being used for an interventional ventricular assist system. Comprising a proximal end tip, a catheter head middle section and a catheter head distal end, and the interior of the proximal end tip is provided with a proper inner surface to prevent the formation of thrombus; the total area and the surface area of the window in the middle section of the catheter head have a certain ratio, so that the heart can be prevented from being blocked by myocardium during contraction on the premise of ensuring blood flux; the distal end of the catheter head has a thickness slightly lower than the thickness of the above part, and can be better joined with the catheter. According to the blood inflow catheter head and device, retention and vortex of blood at the front end of the catheter head can be well avoided, and thrombus is further avoided.

Title: Blood pump assembly, system and methods Abstract Blood pump assembly (1) for blood circulation in a mammal, comprising: a flexible wall structure (2) bounding a first pump chamber (3); a first blood inlet (4) for blood to flow into the first pump chamber (3); and a first blood outlet (5) for blood to flow out of the first pump chamber (3). A series of pouches (6) distributed along a circumferential direction (CD) of the first pump chamber (3) is arranged to cause contraction of the wall structure (2) upon filling of the pouches (6). The assembly (1) is configured to be fluidically connected to a drive unit (7) for driving a driving fluid into the pouches (6) for filling the pouches (6). [Fig. 3A]

The blood pump-oxygenator system (1; ,...; 10) comprises at least one blood pump (11), at least one oxygenator (20, 21), a blood inlet (80) and a blood outlet (90) connected together to form a circuit operable as a cardiopulmonary bypass system suitable for extracorporeal treatment of patient blood, wherein the first blood pump (11) is configured to deliver blood through the circuit from the patient (P) to the blood inflow port (80), through the oxygenator (20, 21) and out of the blood outflow port (90) back into the patient (P). The system (1; ,...; the device (10) further comprises a recirculation loop (100) arranged between the blood inlet (80) and the blood outlet (90), where the recirculation loop (100) houses a first blood pump (11) and an oxygenator (20, 21), where the first blood pump (11) is configured to circulate at least a portion of the blood in the loop through the recirculation loop (100) such that the blood passes through the oxygenator (20, 21) multiple times, and where the first blood pump (11) is configured to circulate at least a portion of the blood in the loop through the recirculation loop (100). Blood is repeatedly subjected to an exchange of O2 and CO2 in oxygenators (20, 21). At least one first valve (31) is provided between the recirculation loop (100) and the blood flow outlet (90) and is configured to control an amount of blood flowing through the recirculation loop (100).

The present disclosure provides a pump housing having a blood flow inlet and a blood flow outlet connected by a passageway, a pump element disposed in the pump housing, and a set rate N set 1. A blood pump system comprising: a blood pump, in particular an intravascular blood pump, having a drive unit configured to drive a pump element at a set speed N ; a sensor array configured to at least intermittently sense at least one circulatory system related parameter CSRP; a controller configured to process the at least one circulatory system related parameter CSRP; and a storage device configured to continuously store the processed at least one circulatory system related parameter, wherein the controller performs a weaning procedure, in which: i) a first sequence of the processed at least one circulatory system related parameter CSRP is stored in the storage device over a first time interval; ii) a first average value AV1 for the first sequence is calculated; and iii) after the first average value AV1 has been calculated, the controller performs a weaning procedure, in which ... set is the deceleration value dN R iv) a second sequence of the processed at least one cardiovascular system related parameter CSRP is stored in a storage device over a second time interval; v) a second average value AV2 for the second sequence is calculated; and vi) a comparison value |Diff| of the difference between the first average value AV1 and the second average value AV2 is measured to be less than a predetermined threshold value TR. CSRP and vii) the controller is configured to repeat steps iv) to vi), and the comparison value |Diff| is compared with a predetermined threshold TR CSRP If it is within, the first counter C up is increased by 1, and the comparison value |Diff| is increased to a predetermined threshold TR CSRP If it is outside, the second counter C down The controller is further configured to perform a departure procedure, wherein the controller is configured to increase the first counter C by one. up is a predetermined first counter maximum value TR Cup When the first counter C reaches the first counter C, steps i) to vii) are repeated. upThe controller is configured to set a second counter C to zero. down is a predetermined second counter maximum value TR Cdown When it reaches the set speed N set is the acceleration value dN I and a second counter C down to zero and repeating steps iv) to vii).

This invention concerns an intravascular blood pump for percutaneous insertion into a patient's blood vessel comprising a pump casing having a blood flow inlet and a blood flow outlet and an impeller arranged in said pump casing so as to be rotatable about an axis of rotation. The impeller has blades designed for conveying blood from the inlet and outlet. The blood pump comprises a drive unit with a plurality of posts about an axis for rotating the impeller. Each of the posts has a longitudinal axis and an impeller-side end pointing towards the impeller. A coil winding is disposed around each of the posts and has an impeller-side end pointing towards the impeller. The coil windings are controllable to create a rotating magnetic field, wherein the impeller comprises a magnetic structure arranged to interact with the rotating magnetic field to cause rotation of the impeller.

The present disclosure provides a solution for assisting cardiac circulation of a subject. In one aspect of the present disclosure, the new solution replaces the common practice of implementing a cannula of left ventricular assist device (LVAD) to the left ventricle (LV) through a large opening made in the apex of the LV, which has some disadvantages such as requirement of sternotomy, making a hole in an already very weak left ventricle, requirement of cardiopulmonary bypass, etc.The solution of the present disclosure suggests introducing the inflow cannula, namely the cannula / tube that suctions blood from the heart, through an opening made in the left atrium appendage (LAA) and guiding it through the left atrium (LA) and the mitral valve (MV) into the LV to be positioned therein. The inflow cannula is designed to allow suction of blood along various portions of its length that are intended to be positioned within the heart, namely along portions that are positioned in the LV, LA and optionally the LAA.The blood that is suctioned by the inflow cannula flows into a mechanical circulatory support device to be pumped therefrom, via an outflow cannula and into the aorta, thereby allowing supply of oxygenated blood to the entire body. Optionally, the outflow cannula can be coupled to the descending aorta and not to the ascending aorta as commonly done in the cases of LVAD implementations.A second aspect of the present disclosure provides a new solution for overcoming right ventricle failure by withdrawing blood from a first portion of the pulmonary artery and streaming blood to a second portion of the pulmonary artery, the second portion is downstream the first portion, namely more proximal to the lungs. The two solutions may be carried out by a similar surgical procedure, such as left thoracotomy. If the two solutions of the present disclosure are used together, they form a total artificial heart solution.

An intra-cardiac mapping system is based on locating the ports through which blood flows in or out the heart chambers. For many procedures, such as ablation to cure atrial fibrillation, locating the pulmonary veins and the mitral valve accurately allows to perform a Maze procedure. The location of the ports and valves is based on using the convective cooling effect of the blood flow. The mapping can be performed by a catheter-deployed expandable net or a scanning catheter. The same net or catheter can also perform the ablation procedure.

A filter device according to the present invention is to be mounted on a centrifugal separator and includes: a first space into which blood flows; a second space from which the blood flows out; a partition wall separating the first space and the second space; a communication port establishing communication between the first space and the second space; and a white-blood-cell removal filter disposed in the second space. The second space is located between the first space and a rotation center of the centrifugal separator.

To provide a valve structure and an introducer sheath that can exhibit high sealing performance and excellent operability. [Solution] The valve structure 120 comprises a housing 130 having a lumen 135, and a thin-film valve body 140 disposed within the lumen of the housing. The valve body has a tip opening 141a formed at the tip 141, a base opening 143a located at the base 143, and a hollow portion 145 connecting the tip opening and the base opening. The housing has a blood inlet 137 between the inner wall 130a of the housing and at least the tip of the valve body into which blood can flow. The valve body is configured to be able to close the tip opening of the valve body as blood flows into the blood inlet.