Abstract: The present invention is directed to a bone plate and its method of use for reducing a bone fracture, the bone plate having a longitudinal axis, the bone plate comprising an upper surface, a lower surface, a first hole for engaging a head of a first bone anchor. The first hole is configured and adapted to fix a shaft of the first bone anchor along a first axis. A second hole is spaced apart from the first hole along the longitudinal axis. The second hole is for engaging a head of a second bone anchor, and is configured and adapted to fix a shaft of the second bone anchor along a second axis. The first hole and the second hole are configured such that the first axis and the second axis define a single plane and intersect at a point below the lower surface. The shafts of the first and second bone anchors may touch or nearly touch at the point of intersection, such that the first and second bone anchors form a truss.

Abstract: A bone plate has an upper surface, a lower surface, and at least one first hole extending through the upper and lower surfaces. The first hole has two or three vertically separate regions, each region communicating with or abutting an adjacent region. The first hole has a first unthreaded upper region, which has a curved inward taper from the plate's upper surface toward the plate's lower surface. The first hole has a second threaded middle region, which has a conical inward taper from the plate's upper surface toward the plate's lower surface. A third unthreaded lower region has a conical outward taper from the plate's upper surface toward the plate's lower surface. The bone plate may be straight, curved, or include a combination of both straight and curved segments.

Abstract: An indicating device assists rescue personnel in administering cardiopulmonary resuscitation (CPR). A transducer measures the pressure drop in a flow tube attached to the patient, and this pressure drop is converted into a flow rate and volume. Another transducer measures the pressure in the flow tube at a point near the patient, the measured pressure being essentially the same as, or related to, the intratracheal pressure. Indicator lights show either red or green or yellow, when the flow rate, and/or the intratracheal pressure, are within or outside of a preferred range. The desired ranges can be adjusted according to the weight of the patient. The device provides immediate guidance for rescue personnel, by indicating whether the volume of gas received by the patient is appropriate, and whether intratracheal pressure is below or above a potentially lethal level.

Abstract: A bone plate for fixation of a fractured bone includes a first portion having a first longitudinal axis and a second portion having a second longitudinal axis. The second portion is angled with respect to the first portion. The first portion has at least one hole for receiving a bone anchor having a shaft. The hole has a first hole portion defining a first central axis substantially perpendicular to a lower surface of the first portion and configured to receive the bone anchor. The hole includes a second hole portion overlapping and in communication with the first hole portion from upper to lower surface defining a second central axis substantially angled with respect to the first central axis, and configured to receive the bone anchor such that the shaft is substantially angled with respect to the second portion of the bone plate so as to form a truss.

Abstract: The present invention is an oxygen sensor, having the form of an electrochemical cell, of the galvanometric type. Oxygen from the outside environment enters the cell through a gas-permeable liquid-impermeable membrane, and supports an electrochemical reaction which generates an electric current. The amount of current produced is proportional to the amount of oxygen entering the cell. The cathode of the cell is a flat, perforated gold disk, and the connection between the cathode and an external terminal is made with a spring which is compressed between the terminal and the cathode. In order to seal the cell against leakage of liquid, the cathode is enclosed within an O-ring, and the membrane is placed directly over the cathode and O-ring combination. In an alternative embodiment, suitable for use in high-pressure environments, the cell is provided with an expansion diaphragm.

Abstract: A compact, light and highly efficient gas regenerator unit for a positive pressure closed circuit rebreathing apparatus having an improved carbon dioxide scrubber contained within an annular frame to the lower open portion of which a spring loaded flexible diaphragm is sealingly connected around its periphery and across the upper portion of which a cover plate is releasably attachable with the interior of the unit within the frame being divided by a transversely extending partition into a gas conditioning chamber, in which the CO.sub.2 of the wearer's expelled breath gases are removed by passing through chemicals compressively retained in the canister of a scrubber extending across the span of the gas conditioning chamber, and a variable volume gas chamber above diaphragm from which the reconditioned gases that have been enriched with a predetermined amount of oxygen are again inhaled.