At present two views are held concerning the relationship between left ventricular and aortic pressure curves as regards contour and ordinate value. The one, sponsored by Wiggers (5) on the basis of experiments on anesthetized dogs with open chests and subscribed to by many others, holds that the systolic portions of both curves are parallel and of approximately the same height, whereas the oth...

OBJECTIVE An in vitro study was conducted to set the necessary pressure in fluids that could break resistance and cross the opening of a tympanostomy tube. METHODS A water column model was created and graduated in centimeters from base to top. We adapted three sorts of tympanostomy tubes. In each model, fluids were tested (tap water, seawater, river water, soapy water and eardrops). The colum...

Although airway clearance techniques (ACT) are essential for chronic respiratory disease treatment, they burdensome and time-consuming (Davies et al, 2020). Poor adherence to ACT in childhood has been linked worse health outcomes (Mikesell 2017). Positive Airway Pressure (PEP) is an ACT. To ensure optimal technique provide visual feedback children, a manometer can be added indicating the pressu...

In this study a comparison between direct and indirect methods of obtaining blood pressure has been made. A statistical analysis of the data supports the view that the muffling of sounds, or the fourth phase of Korotkow, bears a closer and more constant relationship to diastolic pressure measured directly. This report, therefore, recommends the acceptance of muffling of the sounds of Korotkow a...

If filtration is required, sintered-glass funnels should be used as filter paper removes some of the dye by adsorption. Sodium bromide is used in preference to sodium chloride or potassium chloride because the detergent solution gradually develops a turbidity (not visible in the presence of the dye) on addition of the chlorides, and precipitates are formed on storage in mixtures of detergent, a...

[1] The formulation of suitable boundary conditions at the water-ice interface during ice formation (melting) is an important aspect of the sea-ice coupled model. The transfer of water and salt through the water-ice can be posed as different boundary conditions. Behavior of the model under these boundary conditions is illustrated through simple analytical models and a numerical model based on p...