49 results about "Heart-Lung Machine" patented technology

A prosthetic heart valve replacement system and method aim to reduce the time duration of the patient on the heart-lung machine during surgery. In one embodiment, the invention uses a two rings (e.g., of Titanium) comprising a first outer anchoring ring installed in a first step in the patient annulus, e.g., by stapling (e.g., using Nitinol® staples), and a second inner valve ring which has apertures and to which the sewing cuff of prosthetic heart valve (e.g., of Dacron) is sutured around the sewing cuff. The suturing is expediently completed outside of the patient's body, parallel with the stapling of the anchoring ring in the patient annulus. The inner valve ring may have circumferential resiliency. The inner valve ring along with the fastened / sutured prosthetic valve is installed snugly (in a second step) to be captively retained concentrically within the already installed outer anchoring ring, to complete the heart valve replacement.

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 gauges or other surgical procedures where the patient must be put on a heart-lung machine cross-clamping the aorta.

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.

The present invention provides a heart-lung machine which can be carried by one person and can be used independently from an external power supply, consisting of at least three modules (1, 2, 3), wherein a first module (1) contains the blood circulating elements which are necessary for the function of a heart-lung machine, a second module (2) contains a pump drive (9) and an electronic measuring equipment and a control logic (11) and a third module (3) contains the programming unit (14), whereas the second unit is separably connected to the first and the third module.

A multichannel catheter for extracorporeal circulation of blood to a patient undergoing cardiovascular treatments or surgery has three independent channels, an obturator and an expandable balloon. The first channel is the largest and is of a size that allows for delivery of blood through outlet parts in the wall of the first channel to a patient in an amount sufficient to maintain the patient's metabolism and perfusion throughout the treatment or surgery. The obturator is longitudinally insertable into the first channel. The second and third channels are integrated into the wall of the first channel. The second channel is suitable for delivering a biologically active fluid to the heart and / or venting the left heart. The third channel is suitable for delivering a fluid to the balloon for its expansion. The catheter provides an improved means of preparing for or performing cardiovascular surgery on a patient using a cardiopulmonary machine for extracorporeal circulation of blood.

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 present invention relates. to methods and devices for exchanging gas molecules between a gaseous medium and a liquid medium which are particularly suited for applications such as blood oxygenation in heart-lung machines and gas scrubbing. The method of the invention comprises the following steps: a) providing a liquid medium having a surface tension in the range of from 0.02 N / m to 0.06 N / m, b) providing a gaseous medium, c) providing a membrane on an interface between the liquid medium and the gaseous medium, wherein the membrane comprises i) a carrier substrate with through-going openings having a mean diameter in the range from 0.2 μιη to 200 μπι, and ii) a porous superamphiphobic coating layer with openings having a mean diameter in the range from 0.1 μm to 10 μm, which is provided at least on the substrate surface facing the liquid medium, wherein either the liquid medium or the gaseous medium, preferably the gaseous medium, comprises at least one target gas to be transferred and said membrane is permeable for the at least one gas to be transferred and not permeable for the liquid medium due to the super-amphiphobic properties of the membrane surface facing the liquid medium with respect to said liquid medium, d) contacting the gaseous medium with the liquid medium via said superamphiphobic layer for a sufficient time to enrich the liquid or gaseous target medium with the at least one gas to be transferred.

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.

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).

A heat exchanger includes a plurality of tubes 2 through an inner cavity of which a heat-transfer medium liquid flows, a sealing member 6 that seals the plurality of tubes 2 while exposing both ends thereof, with a blood channel passing outside each of the tubes 2 being formed in a central portion in the axial direction of the tubes, and a housing 5 that accommodates the tubes 2 sealed with the sealing member 6. The heat exchanger further includes a hollow fiber membrane 3 that is formed of a plurality of hydrophobic and gas permeable hollow fibers 4 and that is disposed on at least one of an entrance side and an exit side of the blood channel in the housing 5 so that a liquid flowing through the blood channel passes through the hollow fiber membrane 3. The housing 5 includes openings 10 for exposing open ends of each of the hollow fibers 4 forming the hollow fiber membrane 3 to the outside, and gaps between an inner side of the openings and the hollow fibers 4 are sealed. Air can be removed while suppressing a reduction in the heat exchange efficiency.