Thirteen persons diagnosed with amyotrophic lateral sclerosis were int
erviewed to determine the factors involved in making a decision whethe
r to use mechanical ventilatory support. All study participants believ
ed that they alone should make the decision regarding use of mechanica
l ventilation. The factors they considered to be of most importance we
re quality of life, severity of disability, availabilty of ventilation
by means of a nasal mask, possible admission to a long-term care faci
lity, ability to discontinue use of mechanical ventilation, desire to
live, concern for their families' emotional health, and concern for ca
re demands placed on their families. Suggestions are offered to facili
tate the patient's decision-making process through provision of more i
nformation and improved dialogue between patient and professional.