16 results about "Arterial catheter" patented technology

The invention relates to the technical field of medical instruments, and provides an arterial cannula for VA-ECMO, a preparation method and a VA-ECMO system comprising the arterial cannula, the arterial cannula comprises a catheter provided with a liquid guide cavity, the catheter is connected with a guide conical head, a supporting spring is sleeved with the catheter, and a plurality of metal rings are arranged in the middle of the supporting spring close to the end of the guide conical head at intervals; at least one liquid outlet hole is formed in each metal ring and the side wall, corresponding to the metal pipe, of the guide pipe; a sealing plug is arranged between the guide conical head and the end of the supporting spring, the guide wire can pass through the sealing plug, and blood cannot pass through the sealing plug. The multiple metal rings are arranged in the middle of the supporting spring close to the guide conical head end at intervals, the rigidity of the position, provided with the liquid outlet hole, of the catheter is improved through the metal rings, and then machining of the liquid outlet hole of the catheter is facilitated; the supporting spring and the developing metal ring are matched to ensure that the outer-layer tube does not collapse during thermal shrinkage, and meanwhile the clinical usability of the arterial cannula is met.

The utility model provides a hemodialysis catheter fixing device, and relates to the technical field of hemodialysis catheter fixing devices, the hemodialysis catheter fixing device comprises a fixing plate, a fixing structure is arranged on the fixing plate, the fixing structure is mainly composed of two first limiting blocks, the two first limiting blocks are both arranged on the fixing plate, and the first limiting blocks are arranged on the fixing plate. A first limiting block is arranged on the base, a rotating shaft is rotationally connected to the first limiting block, a second limiting block is fixedly connected to the rotating shaft, rubber blocks are fixedly connected to the first limiting block and the second limiting block, a connecting block is fixedly connected to the first limiting block, and a connecting groove is formed in the second limiting block; the hemodialysis catheter fixing device solves the problem that the hemodialysis catheter between a hemodialysis instrument and a patient naturally falls down under the action of gravity and scatters on the ground due to the fact that an existing hemodialysis catheter is usually directly fixed on the hemodialysis instrument, a venous catheter and an arterial catheter are prone to being wound, and the hemodialysis effect is affected.

The arterial access system includes an arterial catheter and a catheter assembly having an access port. A blood collection device is coupled to the access port, and the blood collection device includes a catheter tube, a housing having a distal end portion that movably receives the catheter tube and can be coupled to the catheter assembly, and a forward member configured to move the catheter tube between a first position and a second position so that the distal end of the catheter tube is positioned distal to the arterial catheter. A collection device is located proximal to the housing and is in fluid communication with the catheter tube so that, with the catheter tube in the second position, the collection device directly collects a sample of arterial blood through the catheter tube.

The invention relates to the technical field of medical blood detection, in particular to an arterial blood sampling backflow anticoagulation system and device, which comprises a heparin infusion tube and a four-way assembly, the four-way assembly is connected with the heparin infusion tube, the four-way assembly comprises a main pipeline, the heparin infusion tube is communicated with one end of the main pipeline, the other end of the main pipeline is provided with an arterial duct, and the arterial duct is connected with the four-way assembly. A sampling pipe and a blood storage pipe are arranged on the two sides of the main pipeline respectively, a sampling protection assembly is arranged on the sampling pipe, and the blood storage pipe is connected with a blood drawing storage assembly; the four-way function of heparin input, arterial blood introduction, pure blood collection and mixed liquid temporary storage is integrated through the four-way assembly, additional pipeline switching is not needed, automatic operation of the blood drawing storage assembly is matched, the waste problem that in traditional operation, blood is discarded to avoid heparin interference is thoroughly avoided, blood drawing detection depends on the light sensation module and the quality collection module, and the detection efficiency is greatly improved. The suction and transfusion volume is accurate and controllable, the safety and the blood saving effect are both considered, and the device is particularly suitable for critical patients with high-frequency blood sampling.

A method for neonatal monitoring includes catheterizing a neonatal patient via an implanted umbilical interface, infusing a signaling fluid into the neonatal patient via the neonatal PiCCO venous catheter, monitoring circulating blood for a hemodynamic signal via the neonatal PiCCO arterial catheter, and detecting the hemodynamic signal. Catheterizing the neonatal patient via the implanted umbilical interface includes inserting the neonatal PiCCO arterial catheter into an umbilical artery of the neonatal patient and inserting the neonatal PiCCO venous catheter into an umbilical vein of the neonatal patient.

This utility model belongs to the field of experimental equipment technology, and discloses an ion monitoring device for a rabbit hepatic encephalopathy experimental model, including: an operating table with a monitoring system installed on it; the monitoring system includes a first base with a first fixing rod fixed in the center and two fixing clips on the first fixing rod; a tension transducer with its input end detachably connected to the fixing clips and a three-way valve detachably connected to the input end, with an endotracheal tube detachably connected to the three-way valve for monitoring respiratory rate; and a pressure transducer with its input end detachably connected to the fixing clip and a three-way valve detachably connected to the input end, with an arterial cannula detachably connected to the three-way valve for monitoring changes in arterial blood pressure, heart rate, and respiratory rate during the progression of rabbit hepatic encephalopathy (early, middle, progressive, and recovery phases), thereby increasing the scientific rigor and repeatability of the experimental operation.

An arterial catheter system comprises a catheter assembly including a catheter hub and an arterial catheter. An arterial catheter system comprises a needle assembly including a needle hub and a guide needle. An arterial catheter system comprises an extension tube coupled to the catheter assembly, and a fluid passage extending through the arterial catheter, catheter hub, and extension tube. The first fluid resistance in a portion of the fluid passage within the extension tube is greater than the second fluid resistance in the fluid passage distal to or proximal to the aforementioned portion of the fluid passage. The extension tube has a length L and an inner diameter D. The geometric coefficient G of the aforementioned portion of the fluid passage. f is L / D 4 It is equivalent to and selected to reduce hemolysis during arterial blood collection.

An arterial catheter system may include a catheter assembly that may include a catheter adapter. An arterial catheter system may include an arterial catheter extending from the distal end of the catheter adapter. An arterial catheter system may include a needle assembly that may include a needle hub and an introduction needle. An arterial catheter system may include an arterial blood shielding device coupled to the catheter assembly. An arterial catheter system may include an arterial catheter, a catheter adapter, and a fluid path within the arterial blood shielding device. A first fluid resistance in the portion of the fluid path within the arterial blood shielding device may be greater than a second fluid resistance in the fluid path distal to that portion of the fluid path.

The invention discloses an ECMO arterial duct for improving limb far-end blood supply, and relates to the technical field of medical instruments, and the ECMO arterial duct is technically characterized in that the ECMO arterial duct comprises a duct main body adopting an integrated double-cavity separation design, and a circulation support cavity and a far-end perfusion cavity which are not communicated with each other are formed. The tail end opening of the circulation supporting cavity is used for supplying blood to aorta abdominalis, and the side wall of the far-end perfusion cavity is provided with a side hole for supplying blood to the far end of the limb. An annular blocking water bag is arranged on the outer wall of the catheter and can be attached to the inner wall of a blood vessel after being filled, two-cavity blood flow is separated, backflow is prevented, and the far-end perfusion efficiency is improved. The in-vitro section is provided with a flow limiting device and a flow sensing device which are connected in series, and real-time monitoring and closed-loop regulation and control of blood flow are achieved. Circulation support and limb far-end perfusion can be synchronously completed through single puncture, puncture injury and operation risks are reduced, and the risk of lower limb ischemia caused by indwelling delay of a far-end perfusion tube due to untimely evaluation or wrong evaluation is avoided. The problem of limb far-end ischemia after ECMO catheterization is effectively solved.

The invention discloses a bent carotid artery intubation tube. A tube body comprises a long-section tube; the short-section pipe is arranged on the lower portion of the long-section pipe, the angle C between the long-section pipe and the short-section pipe is larger than or equal to 90 degrees and smaller than or equal to 120 degrees; the bending part is arranged between the long-section pipe and the short-section pipe; the shallow groove is formed in the middle of the short-section tube, and the shallow groove is used for fixing and bundling a blood vessel blocking band; and an inner diameter channel is arranged among the long-section pipe, the short-section pipe and the bent part in a penetrating manner. The catheter body provided by the invention is convenient for an operator to complete left common carotid artery intubation in a relatively deep and narrow space, so that the injury risk of vascular intima and the injury of surrounding tissues are reduced, and the operation safety is ensured; the blood vessel blocking belt stably fixes the arterial cannula at the arterial cannula groove, and the cannula is not prone to blood leakage and slipping.

The utility model discloses a bubble adsorption device for extracorporeal circulation pipeline connection, which comprises an arc-shaped connecting pipe, an exhaust structure for automatically adsorbing air in blood is arranged in the middle of the outer arc-shaped surface of the arc-shaped connecting pipe, and clamping structures are arranged at the two ends of the arc-shaped connecting pipe. Wherein one clamping structure is connected with a heart aorta cannula, and the other clamping structure is connected with an access pipe of a body temperature circulator. In the heart aorta cannula and heart open surgery process, along with blood diversion, air in blood can be rapidly separated from the blood, and the blood can be rapidly separated from the heart aorta cannula; and meanwhile, the two ends of the arc-shaped connecting pipe can be quickly connected with the heart aorta cannula and an access pipe of the body temperature circulator, and the connecting stability is good.

The invention relates to the technical field of medical equipment, and provides an extracorporeal circulation cannula which comprises a cannula body. A first opening area is arranged at the position, away from the first end by a first distance, of the side wall of the cannula body, and a plurality of first side holes are formed in the first opening area. The first side holes are arranged in the side wall of the cannula body in an array mode. According to the intubation tube for extracorporeal circulation, the first end of the intubation tube body is inserted into the venous blood vessel and communicated with the venous blood vessel, and the second end of the intubation tube body is communicated with the external equipment, so that the intubation tube is matched with the external equipment and the arterial intubation tube to form a circulation loop, and blood is drained out of the body from the body; after being subjected to gas exchange by the membrane type oxygenator, the gas is transfused back into the body through the arterial cannula to temporarily replace the cardiopulmonary function, so that rescue treatment is provided for critical patients; meanwhile, the first side holes which are arranged in an array mode are formed in the position, close to the first end, of the cannula body, the first side holes can effectively improve the flow field near an outlet of the cannula, and the recirculation rate can be reduced easily.

Multi-Channel Arterial Catheter for Enhanced Cerebral and Head–Neck Perfusion

This invention relates to the field of medical device technology, specifically an ECMO arterial catheter capable of altering the direction of perfusion blood flow. The catheter comprises a tube body with openings at both ends. The right end of the tube body is a pre-flush section, the middle end is a buffer section, and the left end is a perfusion section. The perfusion section includes a central lumen and three side lumens. The central lumen is located in the middle of the inner part of the tube body, and three equally divided septa are located on the outer periphery of the central lumen, dividing the tube body into three side lumens. The inner wall of the left end of each side lumen is a blood flow redirection surface. This invention, by designing the arterial catheter lumen as a central lumen with forward blood flow and three side lumens with redirected blood flow, maximizes the alignment of the blood flow direction in the ECMO arterial catheter with the physiological direction, reduces the adverse effects of ECMO on left ventricular output and damage to the vascular endothelium, and improves hemodynamic stability and safety during VA-ECMO implementation.