BACKGROUND Cuff pressure (P cuff) control is mandatory to avoid leakage of oral secretions passing the tracheal tube and tracheal ischemia. The aim of the present trial was to determine the efficacy of a mechanical device (PressureEasy®) in the continuous control of P cuff in patients intubated with polyvinyl chloride (PVC)-cuffed tracheal tubes, compared with routine care using a manometer. ...

With sterile precautions and after infiltration with local anaesthetic, a special type of needle was introduced into the lateral aspect of the knee near the upper border of the patella. This needle (S.W.G. 18, Down Bros., with a short bevel and perforations made in the sides 0 5 cm. from the point to prevent blockage) had a tap and a side-arm. A manometer filled with normal saline was attached ...

Respiration in the aquatic larvae of anisopteran dragonilies is of interest from a comparative point of view in that it utilizes a tidal ventilation mechanism in an aquatic medium. In most animals where water is the respiratory medium the flow over the respiratory surfaces is generally undirectional and this probably requires less energy for the extraction of a given amount of oxygen. Tidal or ...

The article gives the electrical conductivity of whole and shredded plant tissue. An experimental study was made dependence resistivity value volume occupied by pulp on pressing time specific pressures while taking into account amount pressed juice. resistance (R) crushed tissue experimentally studied, which, when processing results, recalculated to (ρ) pressure (P) determined using a reference...

(The diagram gives, however, no indication of the hydrostatic pressure due to the liquid in the manometer tube, which is a necessary condition for equilibrium. For further details of the experiments Loeb's original papers and book s may be consulted.) AH and BH represent hydrogen electrodes; AK and BK, calomel electrodes connected to the solutions by saturated KC1. Loeb measured the potential d...

Measurements of the spatial distribution of the time-averaged second-order pressure in a plane standing wave in atmospheric air are reported. Several measurement pitfalls are identified, and solutions are described. These include accounting for slight nonlinearity of the piezoresistive transducer and careful mounting of the transducer. Streaming causes extra complication when a capillary-connec...

capable of accurate adjustment and dosage, at the same time simple in construction, and as far as possible reliable in its action, they started experimenting in March of this year. The first piece of the apparatus to be taken in hand was the safety valve. Those familiar with the intratracheal method of administering anaesthetics well know that an efficient safety valve is a sine qua non. Two ty...