Abstract: A method and apparatus are disclosed for measuring geometry and compliance in sphincters and other narrowing regions. The apparatus comprises a catheter with an inflatable balloon to be inserted and inflated in the narrowing region. Inside the balloon it is possible to make multiple cross-sectional area or diameter measurements in an axial direction such that a three-dimensional profile of the balloon can be obtained. Preferably multiple sets of electrodes are provided inside the balloon and the cross-sectional recordings are based on measurements of the electrical impedance of an electrically conducting fluid inside the balloon.

Abstract: According to the present invention there is disclosed a glazing bar upper cover (70) for use at an angle to the horizontal on a conservatory roof, which glazing bar upper cover comprises a first vent and a second vent (86), the first and second vents (86) providing, in use, a vent from one side to the other of the glazing bar upper cover wherein the first vent is spaced from the second vent along the length of the glazing bar upper bar.