Abstract:
A clear, autoclavable, blow-moldable plastic formulation for medical and other uses comprises a two, or optionally three, component system including (1) a polyolefin consisting of propylene units as a first component, (2) a block copolymer having thermoplastic rubber characteristics with a central block of ethylenebutylene copolymer and terminal blocks of polystyrene, and (3) an optional third ingredient comprising a softening agent of polyethylene or poly(ethylene-vinyl acetate), which is particularly desirably used if the thermoplastic rubber copolymer has a molecular weight of more than 70,000. The formulation is essentially free of liquid plasticizers.
Abstract:
A disposable electrode pad (10) is provided with a socket for a reusable electrode conductor (34) attached to a lead wire (30). The pad includes a socket plate (22) having a release coated top surface and overlying a frame having a bore (18) filled with a gel matrix (20). The pad further includes a flexible clamp plate (60), part of which is strongly adhered to the frame and the rest of which is adhered to the release coated surface of the socket plate (22). The socket plate is provided with a bore (24) used as a socket for a reusable, low profile electrode conductor (34) which is fixedly attached to a lead wire having a jack (32) for connection to external monitoring equipment. In use, the electrode pad is applied to the skin of a subject, the releasable part (68) of the clamp plate is peeled away from the socket plate, the electrode conductor is inserted into the bore (24) of the socket plate, and the clamp plate re-adhered to the socket plate in covering relation to the electrode conductor and the end of the lead wire attached thereto. Accordingly, the end of the lead wire and the electrode conductor are securely held in place (38) relative to the gel matrix. Embodiments for both monitoring and stimulation purposes and alternative electrode conductor/lead wire embodiments are disclosed.
Abstract:
The pump platen assembly takes the form of a support frame which is fixed in relation to the pump axis when the pump is in operation. A rigid platen plate has an elongated channel or trough that supports the straight section of resilient tubing to be compressed by the bearing assemblies. A compression part is interposed between the frame and the floating rigid plate for holding the tubing section in position for sequential compression by the bearing assemblies. The compression part may take the form of an elastomeric foam pad or a series of compression springs disposed between the frame and floating plate. The compression part is only slightly or partially compressed during a normal pump operation but is more fully compressed to permit substantial displacement of the plate when a predetermined maximum back pressure is exceeded.