TY - JOUR
T1 - Comparison of pleural pressure measuring instruments
AU - Lee, Hans J.
AU - Yarmus, Lonny
AU - Kidd, David
AU - Ortiz, Ricardo
AU - Akulian, Jason
AU - Gilbert, Christopher
AU - Hughes, Andrew
AU - Thompson, Richard E.
AU - Arias, Sixto
AU - Feller-Kopman, David
PY - 2014/10/1
Y1 - 2014/10/1
N2 - OBJECTIVE: The objective of this study was to compare the accuracy of a handheld digital manometer (DM) and U-tube (UT) manometer with an electronic transducer (ET) manometer during thoracentesis.METHODS: Th irty-three consecutive patients undergoing thoracentesis were enrolled in the study. Pleural pressure (Ppl) measurements were made using a handheld DM (Compass; Mirador Biomedical), a UT water manometer, and an ET (reference instrument). End-expiratory Ppl was recorded aft er catheter insertion, aft er each aspiration of 240 mL, and prior to catheter removal. Volume of fluid removed, symptoms during thoracentesis, pleural elastance, and pleural fluid chemistry were also evaluated.RESULTS: A total of 594 Ppl measurements were made in 30 patients during their thoracenteses. There was a strong linear correlation coefficient between elastance for the DM and ET ( r 5 0.9582, P < .001). Correlation was poor between the UT and ET ( r = 0.0448, P = .84). Among the 15 patients who developed cough, recorded ET pressures ranged from -9 to + 9 cm H 2 O at the time of symptom development, with a mean (SD) of - 2.93 (4.89) cm H 2 O. ET and DM measurements among those patients with cough had a low correlation between these measurements (R 2 = 0.104, P = .24). Nine patients developed chest discomfort and had ET pressures that ranged from - 26 to + 6 cm H 2 O, with a mean (SD) of - 7.89 (9.97) cm H 2 O.CONCLUSIONS: The handheld DM provided a valid and easy-to-use method to measure Ppl during thoracentesis. Future studies are needed to investigate its usefulness in predicting clinically meaningful outcomes.
AB - OBJECTIVE: The objective of this study was to compare the accuracy of a handheld digital manometer (DM) and U-tube (UT) manometer with an electronic transducer (ET) manometer during thoracentesis.METHODS: Th irty-three consecutive patients undergoing thoracentesis were enrolled in the study. Pleural pressure (Ppl) measurements were made using a handheld DM (Compass; Mirador Biomedical), a UT water manometer, and an ET (reference instrument). End-expiratory Ppl was recorded aft er catheter insertion, aft er each aspiration of 240 mL, and prior to catheter removal. Volume of fluid removed, symptoms during thoracentesis, pleural elastance, and pleural fluid chemistry were also evaluated.RESULTS: A total of 594 Ppl measurements were made in 30 patients during their thoracenteses. There was a strong linear correlation coefficient between elastance for the DM and ET ( r 5 0.9582, P < .001). Correlation was poor between the UT and ET ( r = 0.0448, P = .84). Among the 15 patients who developed cough, recorded ET pressures ranged from -9 to + 9 cm H 2 O at the time of symptom development, with a mean (SD) of - 2.93 (4.89) cm H 2 O. ET and DM measurements among those patients with cough had a low correlation between these measurements (R 2 = 0.104, P = .24). Nine patients developed chest discomfort and had ET pressures that ranged from - 26 to + 6 cm H 2 O, with a mean (SD) of - 7.89 (9.97) cm H 2 O.CONCLUSIONS: The handheld DM provided a valid and easy-to-use method to measure Ppl during thoracentesis. Future studies are needed to investigate its usefulness in predicting clinically meaningful outcomes.
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U2 - 10.1378/chest.13-3004
DO - 10.1378/chest.13-3004
M3 - Article
C2 - 24853674
AN - SCOPUS:84907932129
SN - 0012-3692
VL - 146
SP - 1007
EP - 1012
JO - Diseases of the chest
JF - Diseases of the chest
IS - 4
ER -