Idiopathic clubbing and hypertrophic osteoarthropathy.

Abstract

To the Editor: —This letter is in explanation of an error in our paper Idiopathic Clubbing and Hypertrophic Osteoarthropathy, which appeared in the March, 1956, issue of theArchives. Since publication of our paper our attention has been drawn to discrepancies in the data. We have reviewed these with the laboratory which performed the tests, the Cardiovascular Service at Marquette University. We wish to report that the value given for pulmonary artery pressure is in error and represents a typographical error and that the value given for right ventricular pressure is correct and represents the true value. A second discrepancy is not so easily explained and relates to values given for resting arterial oxygen saturation (90%) and arterial oxygen saturation after inhaling 100% oxygen (94%). These figures were presented as normal and actually represent some reduction. Our explanation is that the data were presented to Dr. Hrowat and me as