Wachstum und altersabh�ngige Strukturver�nderungen der menschlichen Trachea

Considering the measurement of pressures generated during jet ventilation

“…However, there are a few mistakes that we feel important to highlight. In our view, both in their letter and subsequent article, the authors misquote and hence misrepresent the work by Smith et al (3). Additionally, they seem to misrepresent a further paper by Jaquet et al (4) in their article.…”

“…Looking at Hamaekers’ data, a PACT of 75 cm H 2 O was detected using a cannula of 2 mm ID with a cross‐sectional area of 3.1 mm 2 . Assuming a circular shape of the trachea and a diameter varying between 7 and 8 mm in small children (18–22 mm in adults) (3), a cross‐sectional area of 38.5 mm 2 (adults 380 mm 2 ) would result. Compared with the pressures measured at the injector’s tip (PACT), pressures inside the trachea will be markedly lower and may reach values of only 10% of PACT in small children (or 1% of PACT in adults).…”

Functional Assessment After Laryngotracheoplasty

“…Cadaver dissection studies have provided limited data on normal adult extrathoracic tracheal dimensions. Preparations by Beneke et al 30 and Harting and Duweling" reveal a normal adult extrathoracic trachea to have a midsagittal diameter of no less than 1.5 em and a midcoronal diameter no less than 1.4 cm. A more recent study by Brown et al" reveals excellent correlation between these cadaver studies and CT assess-ment, Our control group of normal subjects compared favorably with these previous studies, having an average midsagittal tracheal diameter of 2.2 em and an average midcoronal diameter of 1.9 em (Table 2).…”