1. Perception versus Reality: The Measuring of Pleural Fluid pH in the United States
Respiration 2012;83:316– DOI: /
Fig. 1. Distribution of responding physicians and hospital laboratories in the USA.
© 2012 S. Karger AG, Basel

2. Perception versus Reality: The Measuring of Pleural Fluid pH in the United States
Respiration 2012;83:316– DOI: /
Fig. 2. Distribution of the responses received from the surveyed physicians who answered all questions (n = 267) and those who used pH to manage pleural effusions (n = 231). Responses were categorized according to the analytical techniques available for pleural fluid pH. Each response was then separated into the number of respondents who answered that this technique is the most accurate and the number of respondents who answered that this technique is what their hospital uses.
© 2012 S. Karger AG, Basel

3. Perception versus Reality: The Measuring of Pleural Fluid pH in the United States
Respiration 2012;83:316– DOI: /
Fig. 3. Accuracy of the perceived method used to measure pleural fluid pH by hospital laboratories among the pulmonologists who reported they use pleural fluid pH to manage pleural effusions (231 respondents).
© 2012 S. Karger AG, Basel

4. Perception versus Reality: The Measuring of Pleural Fluid pH in the United States
Respiration 2012;83:316– DOI: /
Fig. 4. Accuracy of the perceived method used to measure pleural fluid pH by hospital laboratories among the pulmonologists who reported they use pleural fluid pH to manage pleural effusions and who believed that BGA is the most accurate method of measuring pleural fluid pH (101 respondents). IDS = Indicator stick.
© 2012 S. Karger AG, Basel