To the Editor.
—The article by Dr Bone entitled "Treatment of Respiratory Failure due to Advanced Chronic Obstructive Lung Disease" in the Archives (1980;140:1018-1021) contains a few comments that I think should be disputed from a practical, clinical approach to respiratory failure.The first comment he makes is that the use of the Venturi mask (or air-entrainment oxygen mask) is the appropriate way to treat respiratory failure. Although it was probably the case when E. J. M. Campbell published his state-of-the-art message in October 1967, it is no longer the case in our current state of medical care. Nasal oxygen presents a far more comfortable, far more efficient, far less expensive way of treating this type of patient. The Venturi masks are rarely readily accepted by the patient. They are always more costly. They always have to be replaced with a nasal cannula while the person eats. They are always