The present disclosure relates to a method for priming an extracorporeal blood circuit using a blood treatment apparatus comprising a dialysis liquid preparation system having, a source of water, a source of bicarbonate concentrate and a source of acid concentrate including sodium chloride while not having a source of sodium chloride only, the method including preparing a priming solution from said source (of water and said source of acid only to obtain an acid/water solution, wherein bicarbonate from the source of bicarbonate concentrate is absent from said solution, connecting an arterial line section of the extracorporeal blood circuit to an outlet of the dialysis liquid preparation system of the blood treatment apparatus, and filling the extracorporeal blood circuit with said priming solution.

A dialysis access is disclosed. The dialysis access includes a tubular base, an initial access structure, a persistent access structure, and a seal. The initial access structure is retractably disposed within an interior of the tubular base and includes a piercing tip. The initial access structure is retractable from an extended position to a withdrawn position. The persistent access structure is coupled to the tubular base and surrounds and extends along a length of the initial access structure with the piercing tip exposed while in the extended position. The persistent access structure remains stationary relative to the base with the initial access structure in the withdrawn position. The seal is disposed within the tubular base to surround the initial access structure while in the extended position and to isolate the initial access structure from a fluid flow path within the tubular base while in the withdrawn position.

An integrated catheter assembly includes a housing member, an outer lumen member extending from the housing member, and a needle member slidably or movably coupled to the housing member, wherein the needle member can be extended beyond a first port of the outer lumen member in a first position and concealed in the outer lumen member in a second position. The outer lumen member has a side port between its first and second ports such that when the needle is extended in the first position and inserted into an arteriovenous fistula, blood from the arteriovenous fistula flashes into the needle member, is diverted through a relief port of the needle member out the side port of the outer lumen member for delivery to a dialysis machine. The assembly further includes an inner lumen member that is disposable through the housing member to extend out from the same the outer lumen member to provide dialyzed blood from the machine. The assembly therefore receives and delivers blood through a single injection site.

The present disclosure relates to a hemodialysis catheter that can monitor intravascular pressure using a MEMS sensor. The hemodialysis catheter comprises a venous lumen, an atrial lumen, and at least one MEMS system sensor. The hemodialysis catheter also comprises a data acquisition and processing system. The hemodialysis catheter can communicate with a monitor system to display pressure data.

A shunt comprising a flexible tube having a first, and a second end, and a central opening, having a first diameter that extends from the first end to the second end. The shunt also includes one or more restrictor bands having a second diameter around the flexible tube. The one or more restrictor bands are located between the first end and the second end of the flexible tube and the second diameter is less than the first diameter such that the restrictor band forms a restriction. The restrictor band is expandable between a first position and a second position. The restrictor band may have fracturable sections configured to fracture in responds to pressure thereby increasing a diameter of the one or more restrictor bands to a diameter greater than the second diameter. The one or more restrictor bands may comprise restrictor bands of at least two different inner diameters.

A hemodialysis system includes: a hemodialysis machine configured to provide hemodialysis treatment to a patient, wherein the hemodialysis treatment includes circulating extracorporeal blood of the patient through an extracorporeal blood circuit; a first oxygen saturation sensor device configured to measure oxygen saturation corresponding to the extracorporeal blood of the patient in the extracorporeal blood circuit; a second oxygen saturation sensor device configured to measure oxygen saturation corresponding to blood flowing within the patient; and at least one controller configured to determine one or more oxygen saturation phase shift (OSPS) values or one or more transcutaneous travel time values corresponding to the patient based on oxygen saturation measurements from the first oxygen saturation sensor device and the second oxygen saturation sensor device.

Various systems, devices, and methods for endovascular implants and placement thereof are disclosed. The implants include a proximal implant segment, a distal implant segment, connector struts connecting the proximal implant segment to the distal implant segment, and a side opening between the proximal implant segment and the distal implant segment. The implants can be used to create an arteriovenous fistula or connect one vessel of the body to another by placement of the proximal implant segment and the distal implant segment within the vessels to be connected. The implants can include one or more anchors for securing the implant in place with respect to the vessels of the body it is connecting. The implants can also include a continuous strut or ring at a distal edge of the proximal implant segment. Also disclosed are methods for percutaneous placement of the implants, and a device for percutaneous delivery.

The present application includes a sheath that is suitable for use in a variety of medical procedures. In one or more implementations, the sheath includes a shunt member, and a curvable portion. The curvable portion may be configured in various orientations to facilitate an intervention, such as a hemodialysis intervention, or the like, by an operator. The curvable portion may be configured to bend between a substantially straight configuration and a curved configuration. In implementations, the sheath may be configured to have detachable and/or interchangeable components (e.g., shunt member, curvable portion, etc.).

A medical catheter assembly includes a catheter tip coupled to a distal end of an elongate catheter member and is symmetric about a plane defined by a septum of the elongate catheter member. The catheter tip defines first and second lumens, and the catheter tip defines first and second openings in the distal portion of the catheter tip. Each opening of the catheter tip is defined by a respective side surface of the catheter tip. Each opening is in fluid communication with a respective one of the first and second lumens of the catheter tip and with a respective one of a pair of lumens defined by the elongate catheter member. The distance between upper and lower surfaces of the catheter tip decreases from a distal end of the proximal portion toward a closed distal end of the catheter tip.

A hemodialysis catheter, a method for making, and a method of performing hemodialysis. The hemodialysis catheter includes an elongated body extending along a longitudinal axis, the elongated body including a first lumen and a second lumen. A first distal end region is formed extending from the elongated body, the first distal end region terminating in a first tip that defines an inner groove and an outer groove to form a corrugated first tip edge surrounding a first tip opening in fluid communication with the first lumen. A second distal end region is likewise formed. The second distal end region is separated from the first distal end region along a median plane. The first distal end region and the second distal end region are designed to diverge from the transverse plane at equal and directionally opposite angles without forming a gap along the median plane.