48 results about "Heart-Lung Machine" patented technology

Methods and apparatus are provided for valve repair or replacement. In one embodiment, the method comprises providing an apparatus having a valve prosthesis, a valve leaflet support and a valve excisor, the apparatus having a first configuration and a second configuration; accessing the aortic root without placing the patient on a heart-lung machine; advancing the apparatus in the first configuration where the valve leaflet support is advanced through a valve, wherein the support is positioned below a valve annulus; expanding the apparatus into a second configuration so that the support will engage the valve; and moving the valve leaflet support and valve excisor together to remove leaflets of the valve. Penetrating members may be advanced into the tissue wherein the penetrating members may act as fasteners to hold the prosthesis in place.

A method and apparatus for repairing the heart's mitral valve by using anatomic restoration without the need to stop the heart, use a heart-lung machine or making incisions on the heart. The method involves inserting a leaflet clamp through the heart's papillary muscle from which the leaflet has been disconnected, clamping the leaflet's free end and then puncturing the leaflet. One end of a suture is then passed through the hollow portion of the clamp, while the other end of the suture is maintained external to the heart. The clamp is then removed and the suture's two ends are fastened together with a securement ring/locking cap assembly to the heart wall exterior, thereby reconnecting the leaflet to the corresponding papillary muscle. The introduction of the clamp, puncturing of the leaflet, passage of the suture therethrough and removal of the clamp can be conducted a plurality of times before each suture's two ends are fastened to the securement ring/locking cap assembly.

Disclosed is a novel filter and delivery means. The device described within will not interfere with standard practice and tools used during standard surgical procedures and tools such as cannulas, clamps or dissection instruments including valve replacement sizing gages or other surgical procedures where the patient must be put on a heart-lung machine cross-clamping the aorta.

A customizable and intuitive user interface for medical systems and devices, such as cardiopulmonary bypass systems, perfusion systems, extracorporeal circulation apparatuses, and heart-lung machines, is provided, which allows for ease of access to critical patient data to facilitate blood perfusion and to monitor and regulate various physiological parameters of a patient and an extracorporeal blood flow circuit during surgical procedures, such as cardiopulmonary bypass and extracorporeal membrane oxygenation (ECMO).

The need for a venous reservoir in a heart-lung machine is obviated by using a vacuum-purged negative-pressure air filter in the venous return line ahead of the main blood pump. The purging vacuum for the venous air filter can also be used to purge air from the cardiotomy reservoir if a backflow-preventing valve is used on the venous air filter.

A total aortic arch reconstruction graft, including

• • a) a first, hollow cylindrical segment in the shape of an aortic arch and adapted to be joined to a patient's ascending aorta, and including three side hollow cylindrical branches in communication therewith and adapted to be joined to a patient's left subclavian artery, left common carotid artery and innominate artery, respectively, and a fourth hollow cylindrical branch adapted to be joined to a heart-lung machine;
  • b) a second, hollow cylindrical segment having a first end being joined to the second end of the first segment, and a second end adapted to be inserted into the descending aorta of a patient, the second segment having an expandable outer wall covered with an expandable open-mesh stent having means for attaching the second segment to an internal surface of a patient's descending aorta,
  • c) a collar having a diameter slightly larger than the diameter of said first segment, the collar located at a juncture where the first end of the second segment is joined to the second end of the first segment, with the collar having means for attachment to the open end of a patient's descending aorta. A surgical procedure for total replacement of the aortic arch of a patient is also disclosed.

This invention is a single, multichannel catheter useful for extracorporeal circulation of blood to a patient undergoing cardiovascular treatments or surgery. The catheter has three independent channels and an expandable balloon at one end of the catheter. The first channel (34) is the largest and is of a size that allows for delivery of blood to a patient in an amount sufficient to maintain the patient's metabolism and perfusion throughout the treatment or surgery. A second channel (36), smaller than the first, is integrated into the wall of the first channel, and is suitable for delivering a biologically active fluid (e.g., for cardioplegia) to the heart and/or venting the left heart. A third channel (38), also smaller than the first, is integrated into the wall of the first channel, and suitable for delivering a fluid to the balloon for its expansion when positioned in the ascending aorta to occlude the flow of blood to the heart. It is important that the first channel accounts for at least about 70% of the total channel volume. The catheter provides an improved means of performing cardiovascular surgery on a patient using a cardiopulmonary machine for extracorporeal circulation of blood. The catheter is particularly useful for cardiac surgery. The multichannel catheter is best prepared using an extrusion molding technique.

A system, method, and apparatus for a patient simulator that interacts with a diagnostic or therapeutic medical device. The system includes a computing device coupled to a patient module. The patient module includes hydraulic equipment that simulates a baseline fluid interconnection with a therapeutic device. The computing device manages physical and virtual data, provides algorithmic calculations for simulating hypothetical patient vital signs, long-term clinical course, and simulates related fluid properties. The simulation system automatically executes a step-wise clinical scenario, specified in a spreadsheet format of patient conditions and equipment scenarios, that also includes audio/visual stimuli of operating room and diagnostic clinic environments, along with data recording capabilities. The therapeutic device can be a heart lung machine (HLM), an extracorporeal membrane oxygenation (ECMO) machine, an emergency cardiac life support (ECLS) device, a ventricular assist device (VAD), a dialysis machines, a hyperthermic intraperitoneal chemotherapy (HIPEC) machine, and an aortic balloon pump.

A system and method uses both a heart-lung machine (HLM) and a catheter and/or pad to reach a target temperature for, e.g., cardiac bypass surgery. At or about the target temperature, temperature control of the catheter/pad is suspended and patient temperature controlled using only the HLM.

The invention discloses a material with a biological anti-pollution function and a preparation method and application thereof, and relates to the technical field of biological materials. The material with the biological anti-pollution function comprises a base material, a polyaminophenol coating and a hyaluronic acid layer, Wherein the polyaminophenol coating is obtained by reaction of phenolic molecules and polyamine molecules. The preparation method comprises the following steps: forming the polyaminophenol adhesive coating on the base material by utilizing a phenol-amine chemical coating technology, and then covalently grafting hyaluronic acid by utilizing amino groups on the polyaminophenol adhesive coating to form a hyaluronic acid coating. After the coating is in contact with an aqueous solution, a hydration layer is formed on the surface to form a super-hydrophilic surface, so that adhesion, migration and proliferation of components, endothelial cells, smooth muscle cells, inflammatory cells and the like in blood and a coating modified material are effectively inhibited, and therefore, the material with the biological anti-pollution function can be prepared and formed as follows: a vena cava filter, an artificial heart inner wall anticoagulation surface, an artificial heart-lung machine anticoagulation surface and the like.

The device of the present invention includes a dual chamber gas exchanger that is configured for increased flexibility and scalability for many clinical applications. The dual chamber oxygenator can be configured and used in various applications, such as in a heart-lung machine for cardiopulmonary support during cardiothoracic surgery, in an extracorporeal membrane oxygenation (ECMO) circuitry, asa respiratory assist device for patients with lung failure, and the like. The dual chamber gas exchanger features two sweep gas flow paths and two gas exchange membrane bundles enclosed in a housingstructure with various blood flow distribution and gas distribution mechanisms. The gas exchanger includes an outer housing, an intermediate housing, two gas exchange fiber bundles, a blood inlet, a blood outlet, two gas inlets, two gas outlets, two gas distribution chambers and an optional heat exchanger.

A microbubble reducer for eliminating and/or removing bubbles of gas from a flow comprising non-Newtonian fluids, wherein the microbubble reducer comprises an inlet at a low point, a curved duct means comprising a gas outlet at a high point, an outlet at a low point, and a lumen that runs through said inlet, said curved duct means, said gas outlet, and said outlet. Additionally, including various methods for removing gas from a flow comprising non-Newtonian fluid(s) using the microbubble reducer, an apparatus comprising the microbubble reducer, and uses of the microbubble reducer pertaining to dialysis or similar treatments, inter alia hemodialysis, plasma exchange, for infusion of blood and other non-Newtonian fluids, and in a heart-lung machine.

The invention discloses a system and method for simulating the blood flow distribution effect after VV-ECMO puncture. The simulation system comprises a vein input pump, a liquid storage tank, a human body model seat and a cardiopulmonary bionic structure arranged on the human body model seat. The cardiopulmonary bionic structure is a hollow structure made of a transparent material and is used for accommodating liquid; the vein input pump is used for pumping colorless liquid into the cardiopulmonary bionic structure so as to simulate blood circulation of a human body; and when the artificial heart-lung machine is connected with two target puncture points in the alternative puncture points, colored liquid is pumped into the heart-lung bionic structure, and the observable blood oxygenation state after extracorporeal membrane lung oxygenation is formed. According to the technical scheme, the simulation system capable of observing the blood flow distribution effect after VV-ECMO puncture is creatively provided, and quantitative evaluation on the blood flow distribution effect after VV-ECMO puncture is conducted in different modes is achieved.