Abstract: A drain cassette for a dialysis unit has a fluid channel between venous and arterial connection ports, and a valve may controllably open and close fluid communication between a drain outlet port and the venous connection port or the arterial connection port. A blood circuit assembly and drain cassette may be removable from the dialysis unit, e.g., by hand and without the use of tools. A blood circuit assembly may include a single, unitary member that defines portions of a pair of blood pumps, control valves, channels to accurately position flexible tubing for an occluder, an air trap support, and/or other portions of the assembly. A blood circuit assembly engagement device may assist with retaining a blood circuit assembly on the dialysis unit, and/or with removal of the assembly. An actuator may operate a retainer element and an ejector element that interact with the assembly.

Abstract: An alarm unit for signaling impending overflow of a urine or ostomy (waste) bag includes an external magnet held at the end of an arm. An internal ferrous armature attracts the magnet which provides flux holding a switch element open when the magnet provides at least a predetermined flux to the switch. A clamp allows the user to fasten the unit to an edge of the waste bag with the bag walls between the magnet and the armature. When the bag contents reach the magnet, fluid force of the bag contents separates the magnet and the armature, causing the switch element to close and conduct power from a power supply to a signal element. The arm may be flexible. The switch element preferably comprises a reed switch controlling an electronic power switch.

Abstract: An earplug includes a body, a post and a magnet. The body is made of a pliable material and includes a proximal end and a distal end. The proximal end is shaped to be positioned proximal to the user's middle ear and a distal end is shaped to be exposed to the external environment of the user's outer ear when the body is inserted into the user's ear canal. The post is at least partially embedded within the body and includes a first end, a second end and a socket located at one of the first and the second ends. The magnet is positioned in the socket of the post and is capable of producing a permanent magnetic field.

Abstract: An alarm unit for signaling impending overflow of a urine or ostomy (waste) bag includes an external magnet held at the end of an arm. An internal ferrous armature attracts the magnet which provides flux holding a switch element open when the magnet provides at least a predetermined flux to the switch. A clamp allows the user to fasten the unit to an edge of the waste bag with the bag walls between the magnet and the armature. When the bag contents reach the magnet, fluid force of the bag contents separates the magnet and the armature, causing the switch element to close and conduct power from a power supply to a signal element. The arm may be flexible. The switch element preferably comprises a reed switch controlling an electronic power switch.

Abstract: An earplug includes a body, a post and a magnet. The body is made of a pliable material and includes a proximal end and a distal end. The proximal end is shaped to be positioned proximal to the user's middle ear and a distal end is shaped to be exposed to the external environment of the user's outer ear when the body is inserted into the user's ear canal. The post is at least partially embedded within the body and includes a first end, a second end and a socket located at one of the first and the second ends. The magnet is positioned in the socket of the post and is capable of producing a permanent magnetic field.