29 results about "Venous cannula" patented technology

The invention discloses an extracorporeal circulation system and a control method thereof, and relates to the technical field of medical instruments. The extracorporeal circulation system comprises a membrane oxygenator, a microembolus filter, a rolling pump, a first pressure detector and a second pressure detector; a liquid inlet of the membrane oxygenator is communicated with the arterial cannula; the microembolus filter is circularly communicated with the membrane oxygenator, and the liquid outlet end of the microembolus filter is communicated with the venous cannula; the rolling pump is circularly communicated with the membrane oxygenator; the first pressure detector is communicated with the rolling pump and is used for detecting the outlet liquid pressure of the rolling pump and generating a first pressure signal; the second pressure detector is communicated with the microplug filter and is used for detecting the inlet liquid pressure of the microplug filter and generating a second pressure signal; the structure of the extracorporeal circulation system and the control method of the extracorporeal circulation system are improved, the accuracy and timeliness of medical staff for judging the oxygenation effect of the membrane type oxygenator are improved, the membrane type oxygenator can be replaced in time, a large number of complications can be avoided, and the death rate of patients is reduced.

Intravenous cannula devices configured to prevent blood backflow and needle prick injuries include a catheter assembly and a needle guard assembly. The catheter assembly includes a hub having a coaxial recess and a valve member positioned therein. The valve member is cylindrical and includes a distal surface having slits collectively defining prongs configured to open and close upon passage of a needle therethrough. Cannula devices configured to prevent needle stick injuries include a safety release component at a distal end of the needle guard assembly. The safety release component includes moveable locking elements configured to fit within an annular groove defined by a proximal portion of the hub upon movement of a needle through the safety release component. Proximal retraction of the needle through the safety release component causes the moveable locking elements to be displaced from the annular groove, thereby decoupling the catheter assembly from the needle guard assembly.

Some embodiments of a medical system include a subcutaneous anchor device that extends outwardly from side wall of an intravenous cannula so as to secure the intravenous cannula in a position relative to a skin penetration point.

Disclosed is an intravenous cannulation device (100) for assisting healthcare users in intravenous cannulation. The device (100) includes a catheter (105) and a needle unit (110) removably disposed within the catheter (105). The needle unit (110) includes a needle (115) and pressure sensors (120) configured for detecting a first pressure generated by a resistance encountered by a needle (115) while piercing a first wall of a target vein and a second pressure generated by a drop in resistance experienced by the needle (115) after puncturing the first wall of the target vein. A microcontroller (125) connected to the pressure sensors (120) measures the detected first pressure and the second pressure, and indicates, on an indicator unit (130), a successful puncturing of the first wall of the target vein based on the measured first pressure and the second pressure for assisting the healthcare user in intravenous cannulation.

The utility model discloses an indwelling needle fixing band, which relates to the technical field of medical instruments and comprises an adhesive tape, binding mechanisms are arranged on two sides of the adhesive tape and used for binding the adhesive tape on the arm of a patient, and a fixing mechanism is arranged on the top surface of the adhesive tape and used for fixing a pipeline. According to the venous cannula fixing device, through the arrangement of the fixing mechanism, a pipeline can be fixed, the fixing height of the pipeline can be adjusted, it can be ensured that the position of the venous cannula in the body of a patient is fixed and stable, the risk of displacement is reduced, and meanwhile discomfort to the patient can be reduced; the fixing mechanism can be used for preventing the remaining needle from being separated in the shaking process of the pipeline, and in addition, the fixing mechanism is convenient to disassemble, so that discomfort of a patient caused by shaking of the remaining needle when the device is disassembled is reduced, a worker can conveniently replace the remaining needle, and the comfort of the patient is improved.

The constant-pressure perfusion device comprises a bottom plate, a first lead screw, a second lead screw and a third lead screw are arranged on the two sides of the top of the bottom plate and the rear end of the center of the bottom plate respectively, the tops of the first lead screw, the second lead screw and the third lead screw are all connected with adjusting knobs, and a lifting seat is arranged at the position, close to the top, of the surface of the first lead screw. A first lifting frame is in threaded connection with the top of the surface of the second lead screw, and a second lifting frame is in threaded connection with the bottom of the surface of the third lead screw. According to the constant-pressure perfusion device for improving the in-vitro frog heart, through the design of a first lead screw, a second lead screw, a third lead screw, a lifting seat, a first lifting frame, a second lifting frame, a guide rod and an adjusting knob, an experimenter can rotate the adjusting knob according to the thread transmission principle, so that the lifting seat and the first lifting frame move up and down along the lead screws; therefore, the purpose of accurately controlling the heights of the liquid storage bottle, the frog heart, the venous cannula and the arterial cannula is achieved, the adjusting mode is high in accuracy, and the experiment efficiency and accuracy are improved.

The present disclosure discloses an intravenous cannula that includes a catheter hub and tubular valve member adapted to allow a needle member to pass through. The valve member is defined with slits that allow the needle to pass through. Further, a valve closure member and needle guard assembly are provided, both adapted to close passage for fluid flow and prevent blood flow from the punctured vein of a subject. The needle guard assembly includes a body portion. A safety clip locks onto a flange defined in the body, and in a biased condition allows a needle to extend through the body and hub. Upon withdrawal of the needle from a proximal end of the hub, a safety pin disengages from the flange and arrests the tip portion of the needle within the device, thereby preventing needle prick injury upon withdrawal of the needle member from the hub.

Some embodiments of a medical system include a subcutaneous anchor device that extends outwardly from side wall of an intravenous cannula so as to secure the intravenous cannula in a position relative to a skin penetration point.

The utility model relates to the technical field of medical apparatus and instruments, and provides a double-cavity femoral vein cannula which comprises a body, a first channel, a second channel, a first cavity and a second cavity. The outer pipe is arranged at one end of the body, an outlet of the outer pipe is communicated with an inlet of the first channel, and a plurality of first drainage holes are formed in the pipe wall of the outer pipe in the axial direction of the outer pipe at intervals; one end of the inner tube is inserted into the outer tube and communicated with the inlet of the second channel, the other end of the inner tube extends out of the outer tube to form an exposed section, and a port of the exposed section forms a second drainage hole; and a gap for lower cavity venous blood to pass through is reserved between the outer wall of the inner tube and the inner wall of the outer tube. According to the double-cavity femoral vein cannula, due to the fact that the first drainage holes are formed in the whole outer tube in the length direction, the inner tube can be allowed to be adjusted within a certain range, and the inferior vena cava drainage effect can be taken into consideration while the superior vena cava drainage effect is guaranteed.

The utility model relates to a PICC (Peripherally Inserted Central Catheter) fixing device, belongs to the technical field of medical equipment, and solves the problem that a PICC is easy to shake to cause displacement and even falling of a tube body when a patient is subjected to venous intubation. The PICC tube fixing device comprises an upper hoop, a lower hoop and a middle bridge plate, the upper hoop and the lower hoop can be hooped on the arm of a patient and are respectively positioned on the upper side and the lower side of a PICC puncture point; the middle bridge plate is connected between the upper hoop and the lower hoop; a positioning clamping ring is arranged on the inner side of the lower hoop, and the positioning clamping ring is of a semi-surrounding annular structure, can be clamped on the outer side of the PICC and is used for positioning the PICC; a pressurizing assembly is further arranged on the inner side of the upper hoop. The pressurizing assembly expands after being inflated and is used for extruding the arm of the patient. According to the PICC fixing device, the PICC is effectively fixed, the phenomenon that an intubation tube deviates or falls off is avoided, and meanwhile the arm of a patient can be pressed to promote blood circulation.

The present invention relates to cannulae for extracorporeal circulation of blood. More specifically, it relates to cannulae used to access the vessels of a patient either to deliver or to drain blood for circulating and processing it outside the body. In particular, it relates to arterial and venous cannulae for extracorporeal circulation having slotted openings.

The invention relates to a protective device for intravenous catheters (4) with a connecting element (7) having two wings (13) and with a two-way stopcock valve (8). During assembly, this connecting element (7) is encompassed by a recess (10'') arranged on the underside of the base plate (16) of the catheter support body (2) such that, after being adhered, the intravenous catheter (4) is securely attached to the skin surface of the respective body part against tensile, compressive, and rotational forces. The connecting element (7) is further secured against compression and rotation by a recess (10) adapted to its shape and height. The central part of the catheter support body (2), which is essentially shaped like a trapezoidal prism and has a tunnel-like form, is rounded on all sides, as are the corners of the base plate (16). The fixing film (3) covering the cannula (5), insertion site and sheathed cannula (11) is designed to be self-adhesive on the underside and has a removable cover film.This is also the case with the cannula support (2). The transparent fixation film (3) and the cannula support (2) are made of flexible material, ensuring a snug fit against the skin of the respective body part. To facilitate application of the fixation film (3), it is provided with a circumferential border (14) and an attached tab (15). Both aids are removed after the fixation film (3) has been applied. The cannula support (2) is also provided with a viewing window (12) for checking the insertion site.

A flexible portal cannula for use in arthroscopic surgery. Distally positioned flaps extend radially outwardly from the outer surface of the cannula and are resiliently foldable to lie against the outer surface of the cannula during insertion into a surgical portal, and resiliently biased to return to the radially outwardly extending position when unconstrained. Slots disposed around the perimeter of the flaps for anchoring and sorting sutures.

Some embodiments of a medical system include a catheter device, such as an intravenous cannula device, having an external anchor device and a subcutaneous anchor device to secure a distally extending cannula of the device in a selected position relative to a skin penetration point.

The invention relates to the technical field of animal models, and discloses a dog continuous infusion model device which comprises an injection pump, a fixed panel is arranged on the upper surface of the injection pump, an infusion extension tube is fixedly connected to the inner wall of the fixed panel, and an iron pack basket is fixedly connected to the outer wall of the infusion extension tube. A clamping groove is formed in the inner wall of the iron pack basket, a three-way valve is fixedly connected to the interior of the iron pack basket, an injection tube is fixedly connected to the outer wall of the right side of the three-way valve, a switch is arranged on the outer wall of the left side of the three-way valve, and venous intubation cloth is fixedly connected to the bottom end of the three-way valve. The animal wears the special waistcoat, the catheter in the dog body penetrates through the opening of the waistcoat to be connected with the bottom end of the three-way valve, and one end of the infusion extension tube is connected to the other opening of the three-way valve, so that the animal can be continuously instilled for multiple times for a long time in a waking state, can freely move in the waking state, does not influence diet and water drinking, and meets the requirement of animal welfare.

The application provides a vena cava cannula assembly, relates to the technical field of medical devices, and is used for improving the safety of heart surgery. The vena cava cannula assembly comprises a vein pipe body, the vein pipe body has an insertion end and an extracorporeal end in communication, a positioning ring is slidably connected with the vein pipe body, and an umbrella-shaped clamping ring is slidably sleeved on the vein pipe body and located on one side of the positioning ring close to the insertion end. An opening is arranged on the side wall of the umbrella-shaped clamping ring, the umbrella-shaped clamping ring surrounds a clamping space, one side of the clamping space towards the insertion end is provided with a clamping port, and the opening is in communication with the clamping space. Thus, the positioning ring can be prevented from falling off, so that a medical accident can be avoided, and the safety of surgery is improved. Meanwhile, the insertion part of the vein pipe body can be tightened through the sliding of the umbrella-shaped clamping ring, so that a hemostatic effect of preventing blood from flowing out due to a heart wall tear can be achieved, and the surgery efficiency is improved.

The invention relates to a protective device for intravenous cannulas (4) with a connecting element (7) having two wings (13) and with a two-way stopcock valve (8). During assembly, this connecting element (7) is encompassed by a recess (10") located on the underside of the base plate (16) of the cannula support body (2) such that the intravenous cannula (4) is securely attached to the skin surface of the respective body part after being adhered, resisting tension, pressure, and rotation. Additionally, the connecting element (7) is secured against pressure and rotation by a recess (10) that is matched to its shape and height. The central part of the cannula support body (2), which is essentially shaped like a trapezoidal prism, is tunnel-shaped and rounded on all sides, as are the corners of the base plate (16). The fixation film (3), which covers the cannula (5), the insertion site, and the sheathed cannula (11), is self-adhesive on its underside and has a removable release liner.This is also the case with the cannula support (2). The transparent fixation film (3) and the cannula support (2) are made of flexible material, ensuring a snug fit against the skin of the respective body part. To facilitate application of the fixation film (3), it is provided with a circumferential border (14) and an attached tab (15). Both aids are removed after the fixation film (3) has been applied. The cannula support (2) is also provided with a viewing window (12) for checking the insertion site.

The embodiment of the invention provides an organ perfusion system. The organ perfusion system comprises a pump, a venous cannula, an arterial cannula, a balloon driving device and a control device. The near end of the venous cannula and the near end of the arterial cannula are connected with a pump. The far end of the venous cannula is provided with a first opening and used for being inserted into tissue veins without blocking the tissue veins. The far end of the arterial cannula is provided with a balloon and a second opening, the second opening is located in the far end side of the balloon, and the far end of the arterial cannula is used for being inserted into a tissue artery. The control device is electrically connected with the pump and the balloon driving device. The control device is used for controlling the pump to operate so as to extract blood of tissue veins and inject the blood into tissue arteries; the control device is further used for controlling the balloon driving device to drive the balloon to expand so as to block the tissue artery when the blood is injected into the tissue artery, and controlling the balloon driving device to drive the balloon to contract so as to conduct the tissue artery after the blood is injected into the tissue artery. The organ perfusion system can perfuse organs to improve organ functions.

The invention provides a vena cava cannula assembly, relates to the technical field of medical instruments, and is used for improving the safety of cardiac surgery. The vena cava cannula assembly comprises a vena cava body which is provided with an insertion end and an in-vitro end which are communicated with each other; the positioning ring is connected with the venous catheter body in a sliding manner; the umbrella-shaped clamping ring is slidably arranged on the venous catheter body in a sleeving mode and located on the side, close to the insertion end, of the positioning ring, a notch is formed in the side wall of the umbrella-shaped clamping ring, a clamping space is defined by the umbrella-shaped clamping ring, a clamping opening is formed in the side, facing the insertion end, of the clamping space, and the notch is communicated with the clamping space. Therefore, the positioning ring can be prevented from falling off, medical negligence can be avoided, and the safety of an operation can be improved. Meanwhile, the insertion position of the venous catheter body can be tightened through sliding of the umbrella-shaped clamping ring, so that the hemostatic effect of preventing bleeding caused by avulsion of the atrioventricular wall can be achieved, and the surgical efficiency can be improved.

The present application relates to the technical field of data processing, in particular to a pediatric transcarotid arterial and venous ECMO cannulation depth prediction method and system, comprising: selecting a data object; incision position positioning; according to the corresponding incision position, measuring the depth of the common carotid artery to the innominate artery into the aortic arch at the corresponding incision position as the ECMO arterial cannulation depth; according to the corresponding incision position, measuring the depth of the internal jugular vein to the inferior vena cava into the right atrium at the corresponding incision position as the ECMO venous cannulation depth; establishing a prediction formula; outputting the prediction result for reference; the present application summarizes the existing pediatric transcarotid arterial and venous ECMO cannulation experience, calculates and verifies the prediction formula of the transcarotid arterial and venous ECMO cannulation depth, so as to provide a reference to help doctors more accurately estimate the cannulation depth before cannulation, reduce complications caused by improper cannulation position; the prediction formula can be used as part of the standardized operation, improve the success rate and safety of ECMO cannulation.

The utility model relates to a kind of extracorporeal circulation venous intubation kits, including venous intubation, the venous intubation has hollow drainage cavity, is divided into front section, middle section and rear section, wherein the diameter of front section is less than the diameter of rear section, the middle section is transition section and is conical, the front section is equipped with support part, the support part is enclosed by several support strips, spacing is equipped between each support strip, the middle part of front section tip is drainage hole one, support steel wire is equipped in the venous intubation, thread tooth is equipped around the head of rear section, venous intubation is connected with guide core cover through connecting piece, guide wire passes through guide core, and venous intubation is guided into blood vessel by guide wire, the utility model structure is simple, can effectively prevent that venous intubation because patient blood volume is insufficient and the effect of exerting negative pressure leads to that the blood flow hole of venous intubation is wrapped, blocked by blood vessel inner wall, influence the effect of venous drainage.

The utility model discloses a kind of extracorporeal circulation intubation forceps for small incision operation, including left forceps and right forceps, left forceps one end is set up left pipe structure of adjustable pipe angle of opposing, right forceps one end is set up and the right pipe structure of corresponding left pipe structure;Left adjusting part one side is set left arc clamping plate, right adjusting part one side is set right arc clamping plate;Left forceps and right forceps are connected by self-locking structure, the application can be clamped to intravenous cannula, the angle of intravenous cannula can be adjusted simultaneously, intravenous cannula is accurately inserted into vena cava, the accuracy of intravenous cannula placement is improved, and the clamping force of intravenous cannula can be automatically locked, prevent intravenous cannula from loosening, and facilitate to push intravenous cannula.

The present invention provides a venous cannula for cardiac surgery, which relates to the technical field of medical devices. It includes a venous cannula body, a connecting tube is sleeved outside the venous cannula body, a flow control mechanism is fixedly connected to the middle position of the connecting tube, an auxiliary heating mechanism is sleeved outside the flow control mechanism, and both ends of the auxiliary heating mechanism are closely attached to the surface of the connecting tube. By setting the flow control mechanism in the present invention, the connecting shaft is driven to rotate by the shaft cover. At this time, the limit strip moves and meshes through the saw teeth, and the tension spring is obliquely stretched. At the same time, both sides of the adjusting rod push the venous cannula body to rotate in an S shape. At the same time, the greater the rotation amplitude of the adjusting rod, the greater the torque of the venous cannula body and the smaller the flow rate, which is beneficial to adjusting the injection rate, avoiding inaccurate adjustment of the injection rate by pushing fast or slow during injection, which may cause secondary harm to the patient, and is convenient for operation.

Apparatus (20) is provided for use with an extracorporeal membrane oxygenation (ECMO) or cardiopulmonary bypass (CPB) machine. The apparatus (20) includes a venous cannula (22), which has a proximal end (24) and a distal tip (26), and is shaped so as to define (a) a blood-drainage lumen (28) through the venous cannula (22), and (b) at or near the distal tip (26), one or more openings (30) between the blood-drainage lumen (28) and outside the venous cannula (22). A connector (36) is coupled to the proximal end (24) of the venous cannula (22) in fluid communication with the blood-drainage lumen (28), and is configured to be coupled to the ECMO or CPB machine. A fluid-tight distal balloon (38) is coupled to the venous cannula (22) near the distal tip (26) of the venous cannula (22). An external proximal balloon (40) is configured to be disposed outside a subject's body. A balloon-connection lumen (42) couples the distal balloon (38) in fluid communication with the external proximal balloon (40). Other embodiments are also described.

The present disclosure discloses an intravenous cannula that includes a catheter hub and tubular valve member adapted to allow a needle member to pass through. The valve member is defined with slits that allow the needle to pass through. Further, a valve closure member and needle guard assembly are provided, both adapted to close passage for fluid flow and prevent blood flow from the punctured vein of a subject. The needle guard assembly includes a body portion. A safety clip locks onto a flange defined in the body, and in a biased condition allows a needle to extend through the body and hub. Upon withdrawal of the needle from a proximal end of the hub, a safety pin disengages from the flange and arrests the tip portion of the needle within the device, thereby preventing needle prick injury upon withdrawal of the needle member from the hub.

An intravenous cannula apparatus configured to prevent blood reflux and needle stick injuries includes a catheter assembly and a needle guard assembly. The catheter assembly includes a hub having a coaxial recess and a valve member disposed therein. The valve member is cylindrical and includes a distal face having slits that collectively define prongs configured to open and close upon passage of a needle. The cannula apparatus configured to prevent needle stick injuries includes a safety release component at a distal end of the needle guard assembly. The safety release component includes a movable locking element configured to fit within an annular groove defined by a proximal portion of the hub upon movement of the needle through the safety release component. Proximal retraction of the needle through the safety release component displaces the movable locking element from the annular groove, thereby decoupling the catheter assembly from the needle guard assembly.

The invention relates to the technical field of data processing, in particular to a child jugular arteriovenous ECMO intubation depth prediction method and system, and the method comprises the steps: selecting a data object; positioning a notch position; according to the corresponding incision position, measuring the blood vessel depth from the common carotid artery to the unknown artery to the aortic arch at the corresponding incision position as the ECMO arterial intubation depth; according to the corresponding incision position, measuring the depth from the internal jugular vein to the inferior vena cava entering the right atrium at the corresponding incision position as the ECMO vein intubation depth; establishing a prediction formula; outputting a prediction result for reference; according to the method, by summarizing the existing infant jugular artery and vein ECMO intubation experience, the prediction formula of the jugular artery and vein ECMO intubation depth is calculated and verified, so that reference can be provided to help a doctor to more accurately estimate the intubation depth before intubation, and complications caused by improper intubation position are reduced; the prediction formula can be used as a part of standardized operation, and the success rate and safety of ECMO intubation are improved.

Provided herein is a percutaneous expandable venous cannula device, and related methods. The device is easily inserted, for example, using standard Seldinger technique via the right internal jugular. The device includes multiple, multi-holed limbs that softly fill, e.g., the right atrium to facilitate complete drainage, enable retraction of the chamber in surgery, and mitigate suction occlusion, filling the entire atrium and allowing for efficient and rapid emptying of the chamber. In aspects, the device facilitates minimally-invasive aortic or mitral valve surgery with single placement via the right internal jugular as the sole cannula needed for full support.

An intravenous cannula apparatus configured to prevent accidental needle stick injuries includes a catheter assembly and a needle guard assembly. The catheter assembly includes a catheter hub having a coaxial recess configured to engage a distal portion of the needle guard assembly. The intravenous cannula apparatus configured to prevent needle stick injuries includes a safety release component at a distal end of the needle guard assembly. The safety release component includes a movable locking element configured to fit within an annular groove defined by a proximal portion of the catheter hub upon movement of the needle through the safety release component. Proximal retraction of the needle through the safety release component displaces the movable locking element from the annular groove, thereby decoupling the catheter assembly from the needle guard assembly.