[The influence of artificial respiration on the stroke volume and its causes. Electromagnetic flow measurement].
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An increasing number of patients under mechanical ventilation in ICUs suffers from being cut off from normal communication. The existing communication facilities, such as letter-boards, magnetic letters, pictograms, Yes-no-signals and attempts at written communication are very often insufficient or not to be mastered by the weakened ICU respirator patient. We, therefore, present an electronic communicator consisting of a keyboard with big push-buttons and an illuminated running-letter display. Up to one page of text can be stored in memory and recalled later as running or printed text. Initial experiences with the electronic communicator show that even weakened respirator patients with diminished sensomotoric abilities successfully manage to communicate with the staff.
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Pulmonary lesions following extracorporeal circulation (ECC) are said to be responsible for decreased functional residual capacity (FRC). Weaning from controlled mechanical ventilation (CMV) in the postoperative period is commonly performed by a CPAP system in order to restore the impaired oxygen exchange. Testing the superiority of CPAP against insufflation at atmospheric pressure (ZEEP), 33 patients after coronary bypass grafting (CABG) underwent from the end of CMV till extubation either CPAP or ZEEP in a randomized distribution. Data sampling included respiratory rate, paO2, paCO2 and AaDO2-Quotient (gas exchange), as well as HR, MAP, CVP and LAP (hemodynamics). None of the obtained data showed statistical significant differences between the CPAP and the ZEEP group. Therefore there appears to be no necessity for CPAP when weaning CABG patients, due to the absence of previous lung damage and the short time range of intubation and CMV.
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