Instrument, system and methods for use in respiratory exchange ratio measurement

The instrument has sensors for sensing oxygen and/or carbon dioxide content in exhaled air received in a receiving area in front of a mouth, an air flow rate sensor for sensing exhaled air flow rates in a flow rate sensing location and an air shield for shielding the receiving area and the flow rate sensing location from air flows from the environment. The air shield leaves a space between the air shield and the mouth of the person in open communication with the environment. The air flow rate sensor senses air flow speed in a location spaced from the exhaled air receiving area, rearward of a front end of the exhaled air receiving area and above a lower end of the exhaled air receiving area. In another embodiment a sensor for sensing ambient wind is provided

Wearable device and method for delivering intravenous solution

A wearable infusion delivery device with an IV bag holding chamber for holding an IV bag for feeding an intravenous solution, a pressing member bounding a pressure chamber, a pressurizer for generating a pressure in the pressure chamber higher than the ambient pressure. The pressure chamber has a flexible pressure chamber wall arranged for, in response to an increasing pressure in the pressure chamber, displacing towards one of the largest sides of the bag holding chamber on a side of the bag opposite of a side of the bag where the pressing member is located. While solution is delivered from the bag, causing first and second walls of the bag contact each other, first in an initial contact area remote from an outlet port and subsequently causing the contact area to grow towards the outlet port. A method for delivering intravenous solution is also described

Insole for reducing peak pressures under a foot

The invention provides an insole (1) comprising a plurality of supporting elements (5A, 5B, 5C) distributed over the insole surface for resiliently supporting a foot. Each supporting element comprises a main supporting portion (9) having a narrowing outer shape, and a widening circumferential buckling wall (7) designed to have a buckling behaviour such that: (i) the buckling wall collapses in reaction to a condition in which an external compressive force exceeds a first force threshold (F1); and (ii) if thus being collapsed, the buckling wall resiliently expands in reaction to a condition in which said external compressive force falls below a second force threshold (F2), which is lower than the first force threshold. In use the insole provides a highly effective dynamically self-adjusting pressure distribution reducing peak pressures under a foot, dynamically when the patient walks. In addition, the insole is compact, non complex, easy to produce, durable and reliable