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Treatment Its Effect Simon on Pleural C. Chakko, andPeterP The of Congestive Fluid Chemistry M.D.;t Sforza, Heart Failure* Stephen H. Caldwell, M.D.;1 M.D.* classification of pleural effusions into transuexudates has great clinical significance. It is believed that the treatment of congestive heart failure may convert an associated transudative pleural effusion into a “pseudoexudate.” We studied eight patients with congestive heart failure during nine episodes of decompensation with pleural effusion, which was bilateral in five and right-sided in three. Thoracocentesis was done on identification of the patient and at 6 ± 2 days after treatment of heart failure resulting in diuresis and a mean weight loss of 5.8 ± 3.2 kg. The mean protein level of the pleural fluid was 2.2 ± 0.7 g/ dL at the initial study and increased to 3.2± 1.08 g/dL at the final study (p<O.Ol). The LDH level of the pleural fluid increased from 116±69 to 183± 117 unitslL (p<O.Ol). The proper dates and P leural effusions may develop as a complication of many local and systemic disease processes.’ In many cases the clinical and roentgenographic manifestations associated ease-specific, invariably will centesis.2 pleural with so the pleural starting be consideration since not disevaluation are of an of diagnostic The first diagnostic fluid is to determine exudate, effusions point thoraco- presence process always requires pleural An exception would clinical manifestations failure. In this elevate such that the it may circumstance, *From prospectively the Veterans with clear ventricular studied Administration in the criteria of an may for an p<O.05). congestive heart pleural fluid’s eight Medical patients Center, Salem, con- and the fluid VA Medical Center, initial to to fluid was but met the pleural study treatment ± 0.09 0.39±0.16 of heart failure. conclude that causes the treatment significant in some of changes in the cases, a transudate may (Chest 1989; 95:798-802) into a “pseudoexudate.” from Patients Salem, was transudate admitted VA, with bilateral records to exudate. heart pleural not chest pain, monia, eligible reviewed failure and ratio disease, or renal tissue Patients with time that chest was determined g/dL M-mode and was typical clinical failure and ular function the and Medical The cardiothorview’ All patients Only features protocol of congestive was of the ventricapproved Veterans consented done patients for depressed Committee The ultrasonogwere rmto study serum posteroan- echocardiograms The Center. and by real-time evidence Development of pneu- seconds, done. of failure pleuritic Upright roentgenographic enrolled. or hepatic posteroanterior confirmed other a history sputum, excluded. echocardiographic were 14 fraction and with suggestive were from ejection heart were two-dimensional ventricular with than which All patients’ no etiology purulent roentgenograms effusion was infiltrates greater 2.5 there fever, thrombosis, lateral the Research Patients venous ofpleural left that effusion. Center, effusion study. pleural connective less for the to ensure for the deep Medical and pleural were level terior Administration or right-sided prothrombin acic Veterans failure included. albumin METHODS heart disease, were to the AND congestive were than part to be by Adminof the study. Each patient within 36 study after failure had clinically 6 were ± hours of the 2 days improved from the was provided and the patient. Thoracocentesis ultrasonic and guidance. weight when by the primary Treatment of Congestive Downloaded From: http://journal.publications.chestnet.org/pdfaccess.ashx?url=/data/journals/chest/21592/ on 05/05/2017 the final congestive diuresis achieved. was performed Approximately and patients’ significant loss an initial identification daily, and the effectiveness weighed estimated thoracocenteses, patient’s of therapy controlled with two diagnostic underwent study was 27 We failure MATERIALS Patients September patients, at the 0.34 from gestive heart failure during nine episodes of decompensation with pleural effusion. We evaluated the changes in the pleural fluid’s chemistry resulting from the treatment of congestive heart failure and determined if such changes would alter the classification of istration with from LDH after chemistry; be converted raphy. possibly what, in increased for three exudate (r0.715; and effusion and Effectiveness of diuresis was measured by weight loss; a significant correlation between weight loss per day and change in the protein level of the pleural fluid was noted presence exudate.357 dilemma and workup for effusion.8 University ofVirginia, Charlottesville, VA. tAssociate Professor of Internal Medicine. ChiefResident in Internal Medicine. §Associate Professor of Radiology. Manuscript received June 30; revision accepted Reprint requests: Dr Chakko, 111-A Cardiology, Miami 3312.5 798 cause. of diuresis concentration the criteria a of thoracocentesis.”2 Neverthebelieve that diuretic therapy protein meet a trial This may lead to a diagnostic an unnecessary and expensive reality, was a simple transudative We ofunknown be a patient presenting of recurrent left precede consideration less, other investigators may effusion for protein 0.64 ± 0.28 (p<O.Ol). In classified as a transudate step in the evaluation of if it is a transudate of an an exudative ofany ratio (p<O.0l) the more extensive and invasive diagnostic workup.23 Congestive heart failure is a common cause of pleural effusion.4 The health and public policy committee of the American College of Physicians notes that “the indication for a diagnostic thoracocentesis is the fluid/serum 0.47±0.13 had heart occurred. ofdiuretic therapy Therapy physician by the usual 50 ml offluid Heart Failure (Chakko, was not caring for technique” was obtained Caldwell, Sfoiza) Table 1 -Clinical, Roentgenographic, Echocardiographic Age, Etiology Case yr ofCHF 1 49 Idiopathic 2 62 3 72 4 5 6 and and Findings* Acute receiving C/T Symptoms, wk JVP S 3 + - Ischemic 2 + Idiopathic 2 + 54 Ischemic 1 61 Idiopathic 1 49 Ischemic 2 + 0.27 0.60 + + 0.36 0.64 + + 0.30 0.55 + + + 0.29 0.70 mission + + + 0.41 0.55 ceived + + 0.34 0.63 the 3 Adriamycin + + 0.28 + 50 *CHF, Congestive pressure; 53, fraction; at each heart third count, were minutes of thoracocentesis protein and Values and failure, LDH of blood for the (normal lost were obtained estimation range, and of the 1 12 to 237 within serum units/L). of tesis. Long-term chemistries was used. the significant SD. ± and In comparing after the Correlation regression at the 0.05 the treatment between in pleural equation. pleural All eight patients and of heart the amounts fluid chemistry Probabilities in the roentgenographic study findings had effusion Pleural resolved effusion Table prior to the was bilateral 2-Pleural Fluid Protein Fluid Case typical were 5 had At the time for yenpatient since his Serum Levels before and after Level, patients re- mean Digoxin brisk and therapy. and weight oral doses patients who one received on vasodilator to treatment, unusually Between loss before the 5.8 ± 3.2 was diuresis in response given on admission and had prior to the initial thoracocen- ofthe second throacocentesis, in all cases persisted, pleural except patient 4, in and 600 ml of fluid removed. hospitalized twice exacerbation ofcongestive heart failure One patient during the heart range, 3 Three with no and no recur(patient 4) was follow-up failure patient (case 3) returned of heart failure and revealed a transudative of 0.44. Two intractable ofProtein Treatment patients heart and LDH of Heart (patients failure, and Pleural Failure g/dl one period, without for pleural to the hospital pleural effusion. effusion with Ratio 2 and three Fluid/Serum LDH Serum ad- patients received and intermittent in the four in addition, or between an LDH level of 153 units!L in the fluid, a fluid/serum ratio ofLDH ofO.54, and a fluid/serum ratio of protein second thoracoin five patients and period all started thoracocentesis, effusion. One for exacerbation Thoracocentesis of congestive heart failure and echocardiographic evidence tricular dysfunction (Table 1). One additional was dropped after enrollment in the study, pleural centesis. three responded digoxin, captopril (20 to 40 mg). exacerbation of congestive rence of pleural effusion. were level. enrolled furosemide and receiving (20 to 40 mg). all mg) daily 160 not was stopped. with thoracocentesis, were continued receiving them; patients was Long-term follow-up (mean, 7.4 months; to 12 months) was available in all patients. patients (cases 5, 6, and 8) were doing well, RESULTS clinical (40 to were receiving the furosemide effusions were smaller whom the large effusion and changes diuresis by mean before t-test evaluated considered as the were During initial patients therapy to intravenous furosemide lost 4 kg in body weight ten levels patients vasodilator thoracocenteses, kg. Patient a bacterial was with two second in all patients. expressed blood and digitalis, All ejection Analysis are the paired of weight were Samples was available Statistical fluid done. stain, four intravenous 0.68 and LDH; protein, which dinitrate. vasodilators were already by roentgenogram. Gram’s one only, isosorbide of intravenous venous jugular ventricular glucose, count, 0.23 + left ratio for cell + elevated LVEF, cardiothoracic differential culture follow-up JVP, sound; and examined aspiration WBC failure; heart C/T ratio, and - 2 Idiopathic and therapy and 0.70 toxicity 8 medications, blocker furosemide, furosemide tension 68 three The remaining + and hyper. 7 in three. of admission, any 3-adrenergic LVE F Ratio Rales right-sided At the time Level Fluid 7) months died and from the Ratios (units/L) Serum Ratio Before After Before After Before After Before After Before After Before After 1 2 1.7 2.7 2.7 3.8 5.5 7.2 5.6 8.1 0.30 0.37 0.48 0.47 282 100 794 489 0.35 0.94 487 295 0.20 0.55 3 3.0 4.6 6.9 7.4 0.43 0.62 114 214 212 0.53 0.75 4 1.2 1.4 5.7 5.4 0.26 0.26 4.4 6.4 7.1 206 226 0.18 3.2 222 0.64 1.03 6 2.7 3.5 5.9 6.3 0.45 0.55 38 145 109 138 5 0.21 0.50 462 164 160 53 229 157 212 176 0.51 0.89 7a 2.0 1.8 6.7 6.2 0.30 0.29 111 82 458 318 0.24 0.25 Th 1.8 3.3 6.2 6.5 0.29 0.51 82 178 318 342 0.25 0.52 8 1.5 3.0 5.9 6.4 0.47 68 161 240 286 0.42 0.56 Mean SD 2.2* 3.2* 6.3 6.5 0.47* 116* 183* 380 274 039* 064* 0.7 1.1 0.6 0.9 0.25 0.34* 0.09 0.13 69 117 198 106 0.16 0.28 I 95 I 4 I APRIL *p<0.01 for before 0.61 vs after. CHEST Downloaded From: http://journal.publications.chestnet.org/pdfaccess.ashx?url=/data/journals/chest/21592/ on 05/05/2017 1989 799 effectiveness of diuretic therapy and changes in the pleural fluid’s chemistry, weight loss was used as a measure of diuresis (Table 3). There was a significant correlation and the (r = 0.715; 0.9 0 0.8 w 0.7 was weak (r=O.642; relationship 0.6 and and did p<O.l). between 0.5 -j U- not reach statistical significance We did not find any significant the size of the pleural effusion 0.3 LDH ratio was normal. level and the fluid/serum thoracocentesis. Another 0.2 protein 0.4 study had PRE POST PRE POT PROTEIN #{149} LDH . 1 . Pleural and after treatment transudate. fluid/serum of heart FIGURE ratios failure. and area of protein Shaded other five months after the study; no evidence disease was found. One patient (case repeated thoracocentesis and eventually empyema tesis done and congestive heart failure. a few weeks after participation LDH before is range for for pleural 1) required died from showed sterile fluid with no evidence of infection. Pleural fluid levels and simultaneous serum levels of protein and LDH and fluid/serum ratios during the two thoracocenteses are shown in Table 2. The mean level in the pleural fluid increased (p<O.Ol). The 0.34 ± fluid was from 116±69 fluid/serum ratio 0.09 2.2±0.71 g/dl to 0.47 ± and level and was a fluid/serum range, 0.64. This ratio of but his fluid/serum patient, as described had marked diuretic response to intravenous with furosemide started on admission and had lost 4 kg tesis. A revealed was low When of body weight before the initial thoracocenpulmonary ventilation and perfusion scan that the probability of pulmonary embolism applying the et al,’2 the sensitivity ing upon how many pairs three criteria proposed and specificity of the criteria of throacocenteses, we applied range in two to 10 criteria the three there group. were (7 exudative increased by Light will vary dependare met.3”3 In the criteria to each thoracocentesis. Thus, total of 27 pairs of criteria for the whole initial study, two criteria percent) were a In the in the patients. After treatment, (37 percent) in five patients. this DISCUSSION The and to 183± 117 units/L for protein increased 0. 13 (p<O.Ol) LDH at increased to 3.2 ± 1.08 g/dl at the The LDH level of the pleural the initial study and final study (p<O.Ol). Both the pleural fluid LDH ratio increased at the second patient (case 5) at the initial transudative of LDH earlier, therapy nine A thoracocenin this study a fluid in the ratio ‘f’ protein weight loss per day fluid protein level with the LDH level changes in pleural fluid chemistry. One patient (case 1) had an initial LDH level in the pleural fluid of 282 units/L, with a markedly elevated serum LDH level of 794 units/L. The fluid/serum U) from between the average change in the pleural p<O.O5); correlation classification exudates ofpleural has great Table 3-Correlation Day and Percentage and LDH Level for LDH effusion clinical between into transudates significance. Average Transu- Weight froni 0.39±0.16 to 0.64±0.28 (p<O.Ol) (Fig 1). The mean WBC count in the pleural fluid increased from 1,137/cu mm±1,085/cu mm to 2,734/cu mm±2,381/ Percen Weigh kg t LoSS, per Loss ofChange in Phural Fluid between Two Thoracocenteses* Protein tage of Cha nge cu mm (p<O.O5) (Fig 1). Gram stains and cultures of all specimens were done, and no evidence for an infectious process was found. The following criteria described by Light et al’2 are commonly used to 1 9 7.2 0.80 59 64 2 3 4 5.5 1.37 41 64 1.57 53 40 differentiate transudates (1) a pleural 4 8 6.6 0.82 17 39 fluid-to-serum pleural fluid protein LDH level 0.5; units/L; 5 4 2.5 0.63 37 58 6 4 2 0.50 30 7a 6 1.6 0.27 7b 9 7.5 0.83 8 3 6.4 2.13 (3) a pleural 0.6. Using and 7b) initially. the 800 were The order LDH criteria, found fluid exudates: ratio greater greater than fluid-to-serum these criteria In from three to at the have than 200 ratio greater patients (cases transudative second (2) a and than 3, 6, effusion thoracocentesis evaluate Days niet day was and correlation the correlation between the Total 7 *There for exudate. to Case 11 significant change with Per correlation in pleural LDH significance (r=0.642; Treatment level fluid was Day Protein LDH 44 -10 -26 83 117 100 between protein average level weak and Heart Failure did (r not 137 weight loss 0.715; p<O.05); reach statistical per p<O.l). of Congestive Downloaded From: http://journal.publications.chestnet.org/pdfaccess.ashx?url=/data/journals/chest/21592/ on 05/05/2017 (Chakko, Ca/dwell, Sforza) dative effusions systemic develop factors hydrostatic when such as pressure or there an is a change increase a decrease in in capillary in colloid oncotic Exudates are the result of pleural inflaminjury, or lymphatic obstruction. An exudative process always requires workup of the a more extensive pleural space search for more life-threatening occult malignancy.2 Transudative common finding in patients 14 It is believed that elevate convert the protein content it into a “pseudoexudate More than 50 years ago, effect of diuresis, using concentration of protein with decompensated volume of fluid and concentration investigators7 diuresis and an a effusion and et a17 studied the on the patients cardiac failure. A decrease a small increase in the in the protein by digitalis were similar and reported. changes rest in bed. About To the in and the three transudates in the pleural was ofthe the more while the more fluid opinion in effusions rapid protein Some The the exudate at the level may One in this serum protein levels believe ratio study hypoalbuminemia. of that protein the would were use to that the than study, ago.5’7 This diuretics the an fluid our years that were for pleural in many would these criteria impressive potent ratio was 0.64. used ones used in the fluid LDH level treatment this and took a pleural range In this ofheart failure, pleural ofLDH level rose of LDH 38 LDH ratio 5) had a pleural also fluid his patient, and failure, all three resolved the protein pulmonary LDH embolism scan. fluid With well after the chemistries for exudate the treatment is doing ratio fluid/serum the pleural criteria with patient 64 percent, fluid/serum but that this of LDH of heart decreased by ventilation-perfusion simulta- permitted and excluded data presented. a pleural level serum transudative had proper classification of these patients;’5 however, contention has not been tested so far. We studied eight patients with typical clinical roentgenographic findings of heart failure. We in the The pleural fluid/serum Another patient (case No have rise fact fluid the changed, and The effusion of the The 1) had the pleural electrolytes, larger, move for (case of LDH was related of water and being much patients He concentration probably met the more effusions at the initial study. We believe markedly elevated serum level In this patient, after treatment though in the was and transudates. criteria Using but more by patient even 2.0 1.3 g/dl). pleural reported explained failure, level (3.8 such and for LDH study study. was are much with high is no past. level remarkably had to those be mean protein there ratios exudates initial final of protein compared in five patients the rise in protein diuresis and investigators fluid/serum that clearance molecules, ascites simultaneous noted failure, was that following slowly. neous also cardiac fluid/serum patients at the percent. increased. Pillay knowledge, and LDH which has done fluid levels of protein to differentiate total g/dL long-standing pleural for from used of 282 unitslL was from the of794 unitsfL. to 3. 1 g/dL. ofour literature pleural of LDH ratios monly 20 and from best the The levels The presence of any one of the three classify the pleural fluid as an exudate.2”2 years ago, Pillay studied six patients with cardiac failure and pleural effusions. The protein concentration of the pleural fluid was estimated on admission and after a period of treatment for cardiac failure when substantial diuresis had occurred. The mean protein level was 1.5 g/dL on admission after treatment. In one patient, it rose fluid fluid/serum the treatment of of Light et al,12 section, are com- today These during pleural pleural protein increased significantly with congestive heart failure. The criteria which are described in the results criteria, mercurial diuretics, in chest fluid in four the the protein. LDH often entails #{149}“3,6 Gilligan and other study measurements. disease, especially pleural effusion is a with congestive heart diuretic therapy may of such of the fluid had observed caused and and using protein pressure. mation, invasive evaluated were of four met. heart months offollow-up. to furosemide the elevated This patient had a brisk diuretic response before thoracocentesis. We believe that pleural fluid/serum ratio is explained by this. investigators Other stances where pleural tive heart failure met and Speicher’7 whether the studied criteria have effusions criteria reported similar secondary for exudates. 495 pleural of Light et in- to congesPeterman effusions would to evaluate be highly alh2 care not to include patients in whom another etiology for pleural effusion might coexist. Patients with isolated left-sided pleural effusion were excluded, since discriminating this percent) had exudative effusions. These investigators’7 did not address the issue of treatment of heart failure or timing of thoracocentesis. It is possible that such a is an uncommon effusions responded Long-term did The similar finding to the follow-up was in heart treatment available the ones used by of heart Pleural failure. in all patients not reveal any other coexistent criteria we used for selecting to 16 Light and pleural disease. patients were very et al’2 for the diagnosis of congestive heart failure in their study of pleural effusions. Treatment ofcongestive heart failure and its effect on pleural chemistry was prospectively Of no high incidence ofheart The et to separate transudates and the 57 patients with congestive other cause for pleural effusion, alh2 depending example, of exudates failure. sensitivity for and diagnosing was specificity exudative the exudates. heart failure 19 patients result ofthe and (33 of treatment criteria effusion of Light will vary on how many of the criteria are met; for if an exudate is diagnosed when only one of CHEST Downloaded From: http://journal.publications.chestnet.org/pdfaccess.ashx?url=/data/journals/chest/21592/ on 05/05/2017 I 95 I 4 I APRIL, 1989 801 the criteria is abnormal, would be 99 percent and an exudate sensitivity 98 percent is diagnosed are abnormal, the 54 percent and that range to the demonstrated when sensitivity all three specificity and 100 percent is of interest exudative compared only and specificity respectively. many that in criteria would respectively.3”2”3 more criteria during the second initial thoracocentesis. pleural be were in failure. that the may later The In some patients, fluid which was be classified as an mechanism which pleural fluid is not well to the visceral pleura and its capillaries sure than the receives Pleural lymphatic in the reabsorption molecules are capillaries, removed molecules There and has while mainly has however, is a dynamic The much lower of the blood congestive hydrostatic between bein the that water rapidly ofprotein other LDH reasonable would than the to assume be large more that likely effusion, a relatively where the concen- with a larger such an effect. relieves hepatic number of patients may demonstrate Treatment of congestive heart failure congestion and may reduce the serum level ratio. which ofLDH, alter of the studied. study Due therapy was given. Four ing treatment for heart which may have altered 802 results have great include to ethical we were unable to perform ately up on identification Our the pleural the and small number reasons, thoracocentesis of a patient clinical significance in the American and Med 1985; pleural Lea and Febiger, College of Physicians. biopsy 1983 in pleural effu- 103:799-802 procedures Pleural VKG. space Total KG. and proteins for pleural pleural fluid. in serous Transudative 7 Gilligan DR, Volk chemical and physical body J fluids. 8 Kupfer pleural Ann 9 Baron disease. Clin Mayo Clin fluids in cardiac effusions. Clin In: Co, Chest Proc 1972; failure. S Chest Med Lea 12 eds. Co. 1982:325-31 Light RW, 13 Intern 14 Vladutiu AD, thoracentesis examination of the Philadelphia: evaluation ed. WB of cardiac Echocardiography. cham- Philadelphia: I, 1972; In: Suratt procedures. St. Luchsinger PM, Louis: PC, separation Gibson CV Ball Mosby WC. oftransudates Pleural and exudates. 77:507-13 Mayewski 1981, and disease. C. Thoracentesis. diagnostic and interpretation Med Heart of medical Med PF, and 1981:119-79 MacGregor the Griner failure angiographic ed. H, Manual effusions: heart and Fishburne RS, the serum 104:584-85 Echocardiographic Febiger, PM, of blood 13:365-81 1986; E, Feigenbaum and Suratt 1934; Med Observations 1984:146-94 H. In: HS. between Congestive . Radiologic Feigenbaum bers. 11 Invest S Braunwald Saunders 10 Blumgart relationship Intern MG. heart. MC, Clin Y, Tessler (letter). RJ, Mushlin ofdiagnostic tests Al, Greenland and procedures. P Selection Ann Intern 94:553-600 AO. Cardiac ed. Pleural failure with effusion. pleural New effusion. York: In: Vladutiu Futura Publishing Co, 1986:173-74 15 16 Hall WJ, tesis (letter). McPeak rax Mayewski RJ. Congestive Ann EM, Intern Levine in congestive SA. heart heart Med 1986; The preponderance failure. failure and thoracen- 104:584-85 Ann ofright Intern Med hydrotho1946; 25:916- 27 17 Peterman TA, stage laboratory Pierce AK. Speicher CE. approach. Pleural Pulmonary Evaluating JAMA disease. medicine. pleural 1984; In: Guenter Philadelphia: effusions: a two- 252:1051-53 CH, Welch JB Lippincott MH, Co, eds. 1982:555- 605 19 immedibefore any patients were already receivfailure before hospitalization, the pleural fluid chemistry. of 1985; 6:49-54 fluid/serum logistic a trial 6:33-48 LF. 6 Chetty 18 Limitations ofpatients may thora- not after Med J 1965; 39:142-43 Mr to demonstrate trating effects of diuresis will be weak; however, we did not find a significant relationship between the size of the effusion and the change in the pleural fluid levels of protein or LDH . It is possible that a study and Philadelphia: Committee, Diagnostic 5 Pillay Ann be and seen 47:493-506 from than and into is suspected, early diseases. Intern 1985; 4 Black the formation is treated, condition thoracocentesis SJ. Med which effusions hour.#{176}’2’ of effusion help to avoid unnecessary effusions are commonly be done Policy Ann 3 Jay arteries.4’8 fluid; the water in the of 30 to 75 percent per failure and sions. pres- pleura, parietal congestive treatment REFERENCES artery, the systemic relationship heart effusion effect RW. Pleural supply pulmonary the effusion is reabsorbed more molecules, and the concentrations this 1 Light to that failure, and we do not believe should be performed routinely; be in the We have demonstrated a significant correlation tween the amount of diuresis and the change pleural fluid level of protein. We hypothesize smaller should therapy. due fact a transudative if a comorbid cocentesis diuretic Diagnostic changes convert heart complicating such the from may in patients with that thoracocentesis particulate matter and protein are by lymphatic vessels.’8”9 Smaller cleared more rapidly than protein.4 are rise. It would failure vessels also play an important role of fluid. Pleural fluid and smaller reabsorbed by the visceral pleural removal ofpleural a turnover rate when heart exudate. understood. supply of the 2 Health is from capillaries its blood effusions Knowledge the the changes may initially a transudate causes have of pleural failure. may Pleural it congestive heart failure, significant changes in pleural fluid chemistry occur with the treatment of congestive heart such management heart a “pseudoexudate” invasive studies. Thus, thoracocentesis, This study effusions If Burke between HE. The the lymphatics which visceral and the Stewart PB. A method pleural and other drain parietal the pleura. potential Am space Rev Tuberc 1965; 79:52-65 20 21 Bergen ASV, of fluid in the 1958; 52:118-21 Clauss RH, effusions. Surg Yacoubian H, Forum 1956; Treatment of Congestive Downloaded From: http://journal.publications.chestnet.org/pdfaccess.ashx?url=/data/journals/chest/21592/ on 05/05/2017 for measuring serous Barker cavities. HG. the J Dynamics Lab turnover Clin Med of pleural 7:201-04 Heart Failure (Chakko, Ca!dwell, Sltwza)