Introduction: Filling tracheal tube cuff (TTC) after intubation is necessary to provide a safe airway in intubated patients. On the other hand, excessive increase or decrease in the pressure of TTC's balloon leads into the dangerous complications such as necrosis and/or aspiration. Accordingly, in the present study, we tried to evaluate the most two common fixed volume and pilot balloon palpita...

There is no controversy regarding the current clinical method of examination of waveform of jugular vein pulse. However there are limitations of clinical assessment of central venous pressure by jugular vein pressure measurement from the level of sternal angle. There are variations in the reported distances from sternal angle to right atrium as well as to upper limit of JVP. In erect position, ...

BACKGROUND: Cuff pressure in endotracheal (ET) tubes should be in the range of 20-30 cm H2O. We tested the hypothesis that the tube cuff is inadequately inflated when manometers are not used. METHODS: With IRB approval, we studied 93 patients under general anesthesia with an ET tube in place in one teaching and two private hospitals. Anesthetists were blinded to study purpose. Cuff pressure in ...

Oxygen optical microsensors are a sensitive method to monitor oxygen production and consumption in soils, sediments, and aquatic systems. They have been used widely to analyze the activity and metabolism of aerobic organisms, also in ecotoxicological tests. We aimed to assess the suitability of a contact-free device to measure cell respiration and photosynthesis for future applications in ecoto...

The apparatus used was the same as that prexviouslv described by Allison and Linden.` 2 The manometer system was damped only by the puncturing needle and the degree of damping was 60 to 70 per cent of the critical value. It must be emphasized that in a system of this type no other damping is required. If, to eliminate artifacts, further damping is applied by electric or mechanical means, the am...

AIMS To demonstrate that a sensor, which is inserted through the sclera and placed in intimate contact with the choroid, can reliably detect changes in the intraocular pressure (IOP). METHODS A manometer was used to control the IOP of three cadaver eyes in steps of 7 mm Hg. A piezoresistive pressure sensor was used to measure the pressure at the choroid through a 2.5 mm diameter hole that was...

CONTEXT Endotracheal tube cuff pressure (ETCP) is recommended to be maintained between 20-30 cm H2O limits. While insufficient inflation of ETC may cause aspirations, over-inflation of it may lead to damage in tracheal epithelium. AIMS We planned to investigate the effects of user experience and cuff pressure inflation method differences following endotracheal tube cuff pressure and complaint...

486 Communications to the Editor well described by Pepe and Marini#{176}and is an important cause of hypotension in mechanically ventilated patients. The lungs are unable to exhale to FRC at the start of the next mechanically initiated inspiration because of airway obstruction. Positive end expiratorv intrathoracic pressure builds up, although this cannot be shown on the ventilator manometer. T...

Frequency dependent phase and amplitude distortion may theoretically be minimized using correction formulae derived from a model which assumes that water-filled catheter-manometer systems are analogous to an oscillating mass attached to a spring and damping pot. This study defines the practical limits of this correction technique using harmonic analysis of simultaneously recorded water-filled a...