Biomedical Sensors, Ltd.

William Paterson

David R Markle

Stuart P Hendry

Michael P Irvine

Barry C Crane

A vacuum rig apparatus for introducing a liquid into a space defined by a shaped article, which apparatus comprises a series of interconnected vessels attached through a port to a vacuum line, wherein one of the vessels is adapted to hold the shaped article and the apparatus is tiltable about a point midway along the vessel so that liquid from a reservoir flows into the vessel to surround the shaped article and fill the space therein when a vacuum is applied to the apparatus.

Vacuum rig apparatus

A multi-parameter catheter comprising sensors enveloped in a sheath made from a biphasic material comprising a layer of microporous hydrophobic substance having micropores which are filled with a hydrophilic substance which when hydrated forms a gel and allows the passage of water-bound ions, and an apparatus for introducing the catheter into a patient's blood vessel.

Multi-parameter sensor apparatus

An apparatus for assembling a tube and a part has a polymeric tube with an axis along the longitude thereof. The part has a cross sectional shape and size to be near an inside surface of the tube when the part is at least partially therewithin. The part or tube is supported so that relative movement along the axis places the part at least partially within the tube located between the ends or in the tube near the distal or proximal end thereof. The part and/or the tube is a thermoplastic polymer made by a process that develops within the polymer a memory of the polymer prior to forming so that residual stresses remaining in the part can be relaxed by changing temperature causing expansion. A form of a relatively nonconductive material is positioned for relative movement along the axis and for placement about the tube. The form is shaped and sized to fit and contain the outside surface of the tube. A heater has an electrically resistive element wrapped about the form for changing the temperature of the tube and the part. A method of assembly of the tube has the steps of supporting it and/or the part for relative movement along the axis placing the part at least partially within the tube, positioning the form for relative movement along the axis for placement about the tube whereinside the part is located to thereby contain the outside surface, changing the temperature of the tube and the part sufficiently to relax residual stresses of the manufacturing processes used to make the tube and/or the part for causing engagement of the inside surface of the tube and the part.

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High Wycombe, United Kingdom

William Paterson