8
Talc Pleurodesis for the Treatment of Pneumothorax and Pleural Effusion* Lisa Kennedy, M.D.; and Steven A. Sahn, M.D., F.C.C.P. (Chest 1994; 106:1215-22) Key Words: pleurodesis; poudrage; slurry; talc Early interest in the development of pleural sym- physis resulted from the desire of surgeons to produce adhesions to facilitate lobectomy.1 Various agents were tried but were found to be of limited value. The indications for pleurodesis have expanded over the years to include the treatment of benign and malignant effusions, the prevention of recurrence of pneumothoraces, and, more recently, to assist in the closure of persistent bronchopleural fistulas. Over the past 20 years, the favorable safety profile, low cost, availability, and ease of administration led to widespread use of tetracycline as the first-line pleurodesis agent. However, parenteral tetracycline is no longer available in the United States. As an ef- fective, inexpensive, and safe pleurodesis agent for use at the bedside is needed, there has been renewed interest in bleomycin and talc as well as new inves- tigation of tetracycline-like agents, such as minocy- cline2-4 and doxycycline.5'6 Because of its excellent record of successful pleu- rodesis7-9 and low cost, talc has received substantial attention recently. The purpose of this article is to review the chemical properties, efficacy, and safety of talc as a pleurodesis agent. MINEROLOGY Talc is a tri-layered magnesium sheet silicate that has significant lubricative properties that make it useful in cosmetic as well as industrial applications. The basic talc structure was determined in 193410 but the geometry and spacial relationships of the octa- hedrally coordinated Mg(OH)2 and the two tetrahe- drally linked SiO4 groups were not described until the late 1960s.11,12 The empirical chemical compound, *From the Division of Pulmonary and Critical Care Medicine, Department of Medicine, Medical University of South Carolina, Charleston. Manuscript received January 4, 1994; revision accepted March 14. Reprint requests: Dr. Sahn, Div. of Pulmonary and Critical Care Medicine, Medical University of South Carolina, 171 Ashley Ave., Charleston 29425 Mg3Si4Oo(OH)2>, is rarely found as a pure entity in nature because of frequent cation substitutions wherein magnesium is replaced by iron, nickel, chromium, or manganese.13 Furthermore, complex geologic processes reacting on diverse preexisting rock types commonly result in the formation of no- table impurities such as tremolite, chrysotile, and anthophyllite.13"14 There are many sources of talc ore and the composition varies widely. Large North American deposits are found in New York, Calif or- nia, Texas, and Vermont.14 TALC AS A PLEURODESIS AGENT The use of talc for the production of pleural sym- physis was first described by Bethune'5 in 1935. This early work involved the creation of pneumothoraces in cats and dogs followed by the insufflation of iodi- nated talc. He also described two patients who received a dusting of talc as a preliminary to lobec- tomy, thus, documenting the first use of intrapleural talc in humans. His observations were confirmed by Singer et al16 and Hanrahan et al17 who simulta- neously published studies using talc poudrage and talc slurry in animals. Several animal models have been used in the study of talc pleurodesis, including cats, dogs, rabbits, pigs, and guinea pigs. Descriptions of gross specimens 3 to 6 weeks after pleurodesis note the presence of mac- roscopic talc on the parietal surface and occasional filmy adhesions.15-17 Frankel et all8 described dense adhesions in dogs who had undergone talc pleuro- desis 3 to 4 months prior to death. In a recent report by Mathlouthi et al,19 dogs given talc by insufflation were examined at 1, 2, 7, 15, and 30 days. Parietal and visceral pleural inflammation at 1 and 2 days was noted. Granulomatous pleural reaction, which was not dose dependent, was also observed. Early experimental models of talc pleurodesis lacked detailed description of the microscopic pro- cess that occurs following the intrapleural application of talc. At 2, 3, 6, 12, and 16 weeks following intra- pleural talc (slurry and poudrage), visceral pleural CHEST / 106/4/ OCTOBER, 1994 1215 Downloaded From: http://journal.publications.chestnet.org/pdfaccess.ashx?url=/data/journals/chest/21701/ on 04/03/2017

Pleurodesis Treatment Pneumothorax and Pleural … · oftalc pleurodesis, includingcats, dogs,rabbits, pigs, andguineapigs. Descriptionsofgrossspecimens3to 6 weeks after pleurodesis

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Talc Pleurodesis for the Treatment of Pneumothoraxand Pleural Effusion*

Lisa Kennedy, M.D.; and Steven A. Sahn, M.D., F.C.C.P.

(Chest 1994; 106:1215-22)Key Words: pleurodesis; poudrage; slurry; talc

Early interest in the development of pleural sym-physis resulted from the desire of surgeons to

produce adhesions to facilitate lobectomy.1 Variousagents were tried but were found to be of limitedvalue. The indications for pleurodesis have expandedover the years to include the treatment of benign andmalignant effusions, the prevention of recurrence ofpneumothoraces, and, more recently, to assist in theclosure of persistent bronchopleural fistulas.

Over the past 20 years, the favorable safety profile,low cost, availability, and ease of administration ledto widespread use of tetracycline as the first-linepleurodesis agent. However, parenteral tetracyclineis no longer available in the United States. As an ef-fective, inexpensive, and safe pleurodesis agent foruse at the bedside is needed, there has been renewedinterest in bleomycin and talc as well as new inves-tigation of tetracycline-like agents, such as minocy-cline2-4 and doxycycline.5'6

Because of its excellent record of successful pleu-rodesis7-9 and low cost, talc has received substantialattention recently. The purpose of this article is toreview the chemical properties, efficacy, and safetyof talc as a pleurodesis agent.

MINEROLOGY

Talc is a tri-layered magnesium sheet silicate thathas significant lubricative properties that make ituseful in cosmetic as well as industrial applications.The basic talc structure was determined in 193410 butthe geometry and spacial relationships of the octa-hedrally coordinated Mg(OH)2 and the two tetrahe-drally linked SiO4 groups were not described until thelate 1960s.11,12 The empirical chemical compound,*From the Division of Pulmonary and Critical Care Medicine,Department of Medicine, Medical University of South Carolina,Charleston.

Manuscript received January 4, 1994; revision accepted March 14.Reprint requests: Dr. Sahn, Div. of Pulmonary and Critical CareMedicine, Medical University of South Carolina, 171 AshleyAve., Charleston 29425

Mg3Si4Oo(OH)2>, is rarely found as a pure entity innature because of frequent cation substitutionswherein magnesium is replaced by iron, nickel,chromium, or manganese.13 Furthermore, complexgeologic processes reacting on diverse preexistingrock types commonly result in the formation of no-table impurities such as tremolite, chrysotile, andanthophyllite.13"14 There are many sources of talc oreand the composition varies widely. Large NorthAmerican deposits are found in New York, Califor-nia, Texas, and Vermont.14

TALC AS A PLEURODESIS AGENT

The use of talc for the production of pleural sym-physis was first described by Bethune'5 in 1935. Thisearly work involved the creation of pneumothoracesin cats and dogs followed by the insufflation of iodi-nated talc. He also described two patients whoreceived a dusting of talc as a preliminary to lobec-tomy, thus, documenting the first use of intrapleuraltalc in humans. His observations were confirmed bySinger et al16 and Hanrahan et al17 who simulta-neously published studies using talc poudrage andtalc slurry in animals.

Several animal models have been used in the studyof talc pleurodesis, including cats, dogs, rabbits, pigs,and guinea pigs. Descriptions of gross specimens 3 to6 weeks after pleurodesis note the presence of mac-roscopic talc on the parietal surface and occasionalfilmy adhesions.15-17 Frankel et all8 described denseadhesions in dogs who had undergone talc pleuro-desis 3 to 4 months prior to death. In a recent reportby Mathlouthi et al,19 dogs given talc by insufflationwere examined at 1, 2, 7, 15, and 30 days. Parietal andvisceral pleural inflammation at 1 and 2 days wasnoted. Granulomatous pleural reaction, which wasnot dose dependent, was also observed.

Early experimental models of talc pleurodesislacked detailed description of the microscopic pro-cess that occurs following the intrapleural applicationof talc. At 2, 3, 6, 12, and 16 weeks following intra-pleural talc (slurry and poudrage), visceral pleural

CHEST / 106/4/ OCTOBER, 1994 1215

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thickening with fibroblast proliferation, macrophageinfiltration, and foreign body reaction has been con-sistently reported in all animal models. Schepers andDurkan20 studied the tissue reaction to intravenouslyadministered and inhaled talc particles; intrapleuraladministration was not performed. They noted thatparticle size was more important than particle com-position and that tissue reaction was almost negligi-ble when the talc particles were less than 3 Am in size.To our knowledge, the pleural reaction to talc relatedto the particle size has not been reported.

Iodine is occasionally included when talc pleur-odesis is performed. Singer et al16 noted no differencein the microscopic or macroscopic reaction to talcwith or without iodine in rabbits. To our knowledge,there are no clinical or animal studies that comparethe pleurodesis potential of talc to talc plus iodine.The efficacy of pleurodesis in those series in whichiodine was used is 95 percent (222 of 234), which issimilar to the efficacy reported in all other series (90percent, 1,052 of 1,168). There is one report of anallergic reaction following the use of iodinated talc.2'

PREPARATION OF TALC FOR PLEURODESIS

Talc used for pleurodesis is United States Phar-macopea (USP) asbestos free and must meet minimalcriteria with regard to loss on ignition, acid-solublesubstances, water-soluble substances, arsenic, lead,and heavy metals.22 Additional product specifica-tions vary among manufacturers. Talc particle sizedepends on the nature and quantity of impurities aswell as the manufacturing process. Particles aregenerally less than 50,m in size; fine grades havingparticles no greater than 10 Am size may be pur-chased. Talc is available from most suppliers of sci-entific products and chemicals. Some of the largersuppliers are as follows: (1) Amend Drug and Chem-ical Company, Irvington, NY; (2) J.T. Baker, Phill-ipsburg, NJ; (3) City Chemical Corporation, NewYork; (4) Humco Laboratory, Texarkana, Tex; (5)Integra Chemical Company, Renton, Wash; (6) Spec-trum Chemical Manufacturing Corporation, Garde-nia, Calif; and (7) American Drug Industries, Chi-cago. The price of talc ranges from $5 to $25 perpound.

While talc is not packaged sterilely by the manu-facturer, limitation on the number of micro-organ-isms is a part of USP specifications and total bacteriacount cannot exceed 500/g. Despite the long-termuse of talc for pleurodesis, there is no standardmethod of sterilization. Dry heat sterilization is themost frequently noted method of sterilization.23-28Three different temperatures and durations of ster-ilization have been reported: 160°C for 2 h,27 1250Cfor 12 h23 and 132°C for 6 hs.28 Ethylene oxide gassterilization has also been described,7'9'29 but details

have not been published. Most recently, Bubik30recommended gamma irradiation. Protocols ofteninvolve either culture of the talc for bacterial patho-gens or inclusion of biologic indicators during thesterilization process.

Talc poudrage may be accomplished by severaldifferent techniques; the most frequently describedmethod is the use of an atomizer or bulb syringe atthe time of thoracotomy or thoracostomy. A talcslurry results when talc is mixed in saline solution andthen gently agitated. The volume of slurry is variable;10 to 250 ml of normal saline solution has been used.

TALC IN PNEUMOTHORAX

The experimental studies of the 1940s initiatedwidespread interest in the treatment of spontaneouspneumothorax of tuberculous3' and nontubercu-IOus32 origin. Both slurry and poudrage were used,and talc quickly became the accepted pleurodesisagent. Anecdotal reports of greater efficacy withpoudrage, as well as the frequent need for the surgi-cal removal of blebs, led to less enthusiasm for talcslurry. In 1956, Gaensler33 advocated partial pleu-rectomy as the preferred treatment for spontaneouspneumothorax stating that "pleurodesis has also lostfavor because of pain which is often worse than af-ter major thoracotomy, febrile reactions, shock, thenecessity for repeated treatments, and prolongedhospitalization which exceeds by far the period ofrecovery after surgery. Further, use of powder hasresulted in talcum embolism with hemiplegia both inman and experimental animals." The popularity oftalc in the United States waned during the 1960s butremained the primary pleurodesis agent in Europe.The 1980s marked the return of talc poudrage for thetreatment of pneumothorax.

Recent clinical applications have included thetreatment of pneumothorax secondary to Pneumo-cystis carinii pneumonia,34 metastatic osteosarco-ma,35 pleural endometriosis,3637 lymphangioleiomy-omatosis,38 and cystic fibrosis.39'40

Table 1 summarizes the English literature publi-cations reporting the use of talc in the treatment ofpneumothorax. While talc slurry31'40'4' has been usedwith success in the treatment of pneumothorax,poudrage at the time of thoracotomy, thoracostomy,and pleuroscopy is by far the most common methodof administration. Various doses of talc have beenused with 2 to 10 g being most common. Criteria forsuccess varies. The effect of dose on success cannot bedetermined from the published data. Steele,31 whosesuccess rate was only 57 percent (17 of 30), definedsuccess as the inability to induce pneumothorax fol-lowing pleurodesis. Most other authors, who use re-currence of pneumothorax as the marker of a failedprocedure, report much higher success rates. The

Talc Pleurodesis for Pneumothorax and Pleural Effusion Treatment (Kennedy, Sahn)1216

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Table 1-Talc Pleurodesis in the Treatment of Pneumothorax*

Dose, Pneumothorax Success/TotalSource, yr Method g Classification (%) Comments

Steele,3' 1947 Slurry 2 PSP, SSP 5/16 (31) Secondary to tuberculosis; fever,

Steele,3' 1947Meade and Blades,32 1949Shefts et al,73 1954Marrangoni et al,74 1955Smith and Rothwell,25 1962Jackson and Bennett,72 1969

Crosby,36 1973

3-10N/AN/AN/A2-510

Poudrage N/A

PSP, SSPPSP, SSPPSP, SSPPSPPSP, SSPPSP

SSP

Poudrage "Large" SSP

Dieter and Leisen,37 1981

Tribble et al,39 1986Bourke et al,35 1987

Verschoof et al,75 1988Almind et al,4' 1989Spector and Stern,40 1989Pouwels and Wouters,556 1989

Daniel et al,23 1990t

Tunon-de-Lara et al,34 1992

Ohri et al,47 1992

Warren et al,38 1993

Van de Brekel et al,76 1993Kennedy et al,28 1994

Poudrage N/A

Poudrage 2Poudrage N/A

Poudrage 3Slurry 5Slurry 10Poudrage 3

Poudrage 2-10.5

N/A

SSP

SSPSSP

PSP, SSPPSP, SSPSSPSP

PSP, SSP, IP

SSP

2-5 SSP

Poudrage N/A

Poudrage N/ASlurry 10

SSP

SPIP

12/14 (86)6/6 (100)

33/33 (100)25/25 (100)58/61 (95)

1/1 (100)

pain reportedSecondary to tuberculosisTalc with sulfanilamide used

Iodine usedCase report chest wall tumor

following pleurodesis; iodineused

1/1 (100) Secondary to thoracicendometriosis

22/22 (100) Secondary to systemic lupuserythematosus, chronicobstructive pulmonary disease,asthma and tuberculosis; 2respiratory failure deaths

1/1 (100) Secondary to thoracicendometriosis

5/5 (100) Secondary to cystic fibrosis2/2 (100) Secondary to metastatic

osteosarcoma37/38 (97) Iodine used27/29 (93) Fever, pain reported

5/5 (100) Secondary to cystic fibrosis29/30 (97) Fever, pain, and pneumonia

reported19/20 (95) Secondary to cystic fibrosis,

chronic obstructive pulmonarydisease, and postoperativebronchopulmonary fistula

1/1 (100) Secondary to Pneumocystis carinuipneumonia

15/15 (100) Secondary to tuberculosis andchronic obstructive pulmonarydisease

2/2 (100) Secondary tolymphangioleiomyomatosis

313/356 (88)3/3 (100) Secondary to postoperative

bronchopleural fistulas617/681 (91)

*N/A=not available; PSP=primary spontaneous pneumothorax; SSP=secondary spontaneous pneumothorax; SP=spontaneous pneumothorax,unspecified etiology; IP=iatrogenic pneumothorax.

tIncludes five patients previously described in article by Tribble et al.39 Results were not duplicated in total.

overall success rate is 91 percent (620 of 684).

TALC IN PLEURAL EFFUSION

In the first report of talc in the treatment of pleu-ral effusion in 1958, Chambers25 noted clinical suc-

cess in 17 of 20 patients who received talc slurry fortreatment of malignant pleural effusions. The litera-ture that followed this initial report, until recently,dealt almost exclusively with the application of drytalc at the time of thoracotomy (dusting), thoracos-copy (insufflation), or through a series of chest tubes(Venturi propulsion).42 Recent reports9'28 note theresurgence of interest in the use of talc slurry, which

may be especially applicable to those patients inwhom thoracoscopy poses a risk.

Talc has been used to produce pleural symphysisin patients with all types of effusions. While malig-nant effusions are most commonly treated, there are

numerous reports of its use in the treatment of effu-sions secondary to radiation,23'43 chylothorax,23'44-46yellow nail syndrome,23'47 systemic lupus erythema-tosus,48 empyema,4749 Waldenstrom's macroglobu-linemia,23 Dressler's syndrome,47 constrictive peri-carditis,28 and congestive heart failure.9The efficacy of talc in the control of malignant

pleural effusions has been compared with several

CHEST / 106 / 4 / OCTOBER, 1994 1217

PoudrageDustingPoudragePoudragePoudragePoudrage

Nandi,42 1980

N/A

Poudrage

Total

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Table 2-Talc Pleurodesis in the Treatment of Pleural Effusion

Dose, Success/TotalSource, yr Method g (%)* Comments

Chambers,25 1958Haupt et al,77 1960tCamishon et al,24 1962tStarkey,71 1964Gingell,46 1965

Pearson and MacGregor,651966

Adler and Rappole,79 1967Prorok and Nealon,8 1968

Jones,27 1969Bloomberg,80 1970Shedbalker et al,8' 1971Adler and Sayek,7 1976Adler and Sayek,7 1976Adler and Sayek,7 1976Adler and Levinsky,44 1978Harley,82 1979Weissberg et al,83 1980$Weissberg and Kaufman,84

1980Todd et al,58 1980

Fentiman et al,50 1983

Sorensen and Svendsen,54 1984

Kaine,48 1985

Weissberg and Kaufman,49 1986

Fentiman et al,53 1986

Hamed et al,5' 1989Daniel et al,23 1990

Aelony et al,29 1991

Ohri et al,47 1992

Webb et al,9 1992

Aelony,43 1992Hartman et al,26 1993

Kennedy et al,281994

SlurryPoudrage"Cream""Rubbed"Poudrage

Poudrage

PoudrageNA

PoudrageSlurryNA"Dusting"SlurrySlurry and

poudragePoudragePoudragePoudrage

Poudrage

Poudrage

Slurry

N/A

Poudrage

Poudrage

PoudragePoudrage

Poudrage

Poudrage

Slurry

PoudragePoudrage

Slurry

Total

7-14N/AN/A2-45

N/A

N/AN/A

51

N/AN/A10N/A

5-1022

19/22 (86)19/19 (100)31/31 (100)6/6 (100)4/4 (100)

15/17 (88)

4/4 (100)60/60 (100)

20/22 (91)12/12 (100)19/25 (76)4/4 (100)41/44 (93)2/2 (100)

39/44 (89)31/35 (89)35/39 (90)

1 bronchopleural fistulaSee Prorok citation belowfSee Prorok citation belowf

All chylothoraces; hypotension and cyanosisnoted; iodine used

1 operative death

Pain and fever reported3 perioperative deaths, 1 local infection, 1

bronchopleural fistula reportedIodine used

Transient hypotension reportedTwo chylothoraces

Iodine used

NA 148/163(90) Empyema, respiratory failure and/orpneumonia, pulmonary embolus,myocardial infarction, and death reportedin context of thoracoscopy and poudrage

N/A 18/20 (90) Subcutaneous emphysema, postoperativeseizure, peroneal nerve palsy reported

10 9/9 (100) Empyema and staphylococcus bacteremianoted

N/A

N/A

N/A

2-

2

2

3

1/1 (100)

5/5 (100)

11/12 (92)

Effusion secondary to systemic lupuserythematosus

Poudrage performed for the treatment ofempyemas

Local infections, subcutaneous emphysema,and asystolic arrests reported

5 10/10 (100) ...10.5 18/20 (90) Effusions secondary to Waldenstroms

macroglobulinemia, yellow nail syndrome,chylothorax, radiation, and malignancy

t.5 34/39 (87) Mesothelioma grew out of chest tube site;fever, breathlessness, and pain noted

'-5 35/39 (90) Effusions secondary to malignancy, yellownail syndrome, empyema, chylothorax,Dressler's syndrome, and radiation; 5deaths reported

5 34/34 (100) Effusions secondary to congestive heartfailure, malignancy, and AIDS withPneumocystis carinii pneumonia, Kaposi'ssarcoma, and tuberculosis; iodine used

1/1 (100) Secondary to radiation1-6 20/21 (95) Fever, subcutaneous emphysema and chest

10 35/44 (80)pain reported

Effusion secondary to malignancy andconstrictive pericarditis; fever, pain,respiratory failure, empyema, arrhythmia,and hypotension reported

659/723(91)

Talc Pleurodesis for Pneumothorax and Pleural Effusion Treatment (Kennedy, Sahn)

*Some patients treated with talc were not evaluated for success.tPatients in these two studies also reported by Prorok et a18 and were not included twice in the total.$Patients in this study reported again by Weissberg and Kaufman84 were not included twice in the total.

1218

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different agents, including mustine,50 bleomy-cin,65152 tetracycline,2653 quinacrine,40 and tubethoracostomy alone.54 In all comparisons, talc wasfound to be superior.

Reports from the English literature that describethe use of talc for the treatment of pleural effusion aresummarized in Table 2. Success was defined differ-ently, primarily on the basis of clinical criteria orradiographic findings. In several studies, the com-plete and persistent absence of pleural fluid was thedeterminant of successful pleurodesis, while in othersthe lack of need for further pleural drainage was thesole criterion. Follow-up times were variable; somepatients were followed up long term while otherswere evaluated for success only at 1 month afterpleurodesis. Doses from 1 to 14 g have been used. Itis problematic to determine the effect of dose onsuccess since no head-to-head comparisons of similarpatient populations have been made. Similar rates ofsuccess are noted with .5 g (221 of 241, 91 percent)or >5 g (85 of 97, 88 percent). Using success criteriareported by each author, an overall success rate of 91percent (657 of 721) was noted. When analyzed bythe method of administration, a success rate of 91percent (151 of 166) was observed after talc slurryand 91 percent (418 of 461) after poudrage.

SAFETY AND LONG-TERM SURVIVAL

Several safety aspects should be considered withintrapleural talc: (1) short-term, procedure-relatedissues such as pain, fever, infection, systemic embo-lization, hemodynamic compromise, and respiratoryfailure; and (2) long-term effects on pulmonaryfunction, survival, and risk of malignancy.

Most pleurodesis agents are associated with pain atthe time of instillation into the pleural space. In areview of pleurodesis agents by Walker-Renard andcolleagues,55 pain was associated with doxycycline,minocycline, tetracycline, bleomycin, cisplatin, cyt-arabine, doxorubicin, Corynebacterium parvum,mitomycin C, and talc. The degree of pain associatedwith talc has been variously reported from nonexist-ent to severe. Walker-Renard and colleagues55 re-ported pain with talc in 9 of 131 (7 percent) patients.To our knowledge, there are no controlled studiesthat compare talc-induced pain with that caused byother agents.

Fever following pleurodesis is common and hasbeen noted following the administration of mostagents.55 Fever following talc poudrage26'29'55'56 andslurry28,41 is common, occurring from 16 to 69 per-cent of the time. Fever characteristically occurs 4 to12 h following talc instillation and may last for 72 h.Empyema and local site infections are recognized,

although infrequent, complications of thoracentesisand tube thoracostomy.57 Empyema has been re-

ported with talc slurry from 0 to 11 percent of pro-cedures,28'41'54'56 while poudrage is associated with a0 to 3 percent incidence.8 29'58 Local site infection isuncommon.8'53

Cardiovascular complications, such as arrhyth-mias,28'47 cardiac arrest,53 chest pain,26 myocardialinfarction,58 and hypotension7'28'46 have been noted.In many instances, it is difficult to ascertain whetherthe complications are a result of the surgical proce-dure or related to talc per se.

Both inhalation59'60 and injection60O62 of talc areassociated with the development of pulmonary dis-ease. Respiratory insufficiency has been reportedwith both talc poudrage and talc slurry. Rinaldo andcolleaguesc3 reported the development of adult res-piratory distress syndrome in three patients who re-ceived a 10-g talc slurry via a chest tube; two patientsrecovered. The mechanism of respiratory failure isunclear; however, the authors speculated that a sys-temic inflammatory response or talc impurity mayhave been responsible. Bouchama and associates64reported a case of acute pneumonitis that followedclosed pleural biopsy and 2-g talc slurry pleurodesis;they postulated that respiratory failure occurredfrom talc emboli to the lungs. Todd and colleagues58reported respiratory failure/pneumonia in sevenpatients and Nandi42 reported two deaths secondaryto respiratory failure at 3 days and 6 weeks, all inpatients who had talc poudrage. In a recent report byKennedy and colleagues,28 three cases of respiratoryfailure were attributed to talc slurry pleurodesis. Onepatient who underwent bilateral, simultaneous talcpleurodesis procedures required mechanical ventila-tion while two other patients were treated with oxy-gen and corticosteroids alone. It is doubtful that themethod of administration plays a major role in thedevelopment of respiratory failure, although the doseof talc may be important.Death has been reported in several series in which

patients underwent talc pleurodesis.27'40'42'58,63,65 Thecause of death in each of these series was not defin-itively determined.Lange et a166 noted lung function 22 to 35 years

after treatment for pneumothorax with tube thora-costomy and talc poudrage. Those who received talchad a lower total lung capacity than those whoreceived tube drainage alone, 89 vs 96 percent ofpredicted, respectively. There was no difference be-tween the VC or FEVI when comparing the twogroups. Short-term follow-up after talc poudrage67'68revealed no difference in lung function when com-pared with other patients who have undergone tho-racotomy. The use of talc in the treatment of patientswith cystic fibrosis prompted a study that showedminimal impairment in pulmonary compliance ingrowing pigs who underwent poudrage.69

CHEST / 106 / 4 / OCTOBER, 1994 1219

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Survival data on most patients who receive talcpleurodesis for the treatment of pleural effusion arelimited because of the nature of their disease. Mor-tality has been primarily related to the progression ofthe underlying disease or in operative proceduresinvolving debilitated patients. Case reports describ-ing the use of talc in nonmalignant effusions supportlong-term survival without significant sequelae.Long-term follow-up of 240 patients who receivedtalc or kaolin for the treatment of spontaneouspneumothorax70 revealed a higher death rate whencompared with a control population. However, thehigher death rate was attributed to a selection bias forpatients with underlying pulmonary disease and wasnot attributed to the use of talc. The only otherlong-term follow-up available66 did not address mor-tality.An association between talc and cancer has been

described in those who mine and process talc;7' thisassociation is attributed to asbestos, which is com-monly found in association with talc. While there isa single report72 of a patient who developed an ad-enocarcinoma of the pleura 2 years following iodizedtalc insufflation for spontaneous pneumothorax, talcwas not thought to be causative. Lange and col-leagues66 noted the absence of mesothelioma 20 to 35years after talc poudrage. Chappell and associates70found no increase in lung cancer in another group ofpatients who were followed up long term. Althoughno animal studies have been conducted with regardto the carcinogenic potential of intrapleural asbestos-free talc, to our knowledge, there is currently no ev-idence to suggest that an increase risk of cancer ex-ists in those who undergo talc pleurodesis.

CONCLUSIONSTalc is a highly effective pleurodesis agent when

administered either via poudrage or slurry in patientswith pleural effusion or pneumothorax. Success ratesare similar for the two primary modes of adminis-tration: 87 percent (189 of 217) for talc slurry and 93percent (988 of 1,062) for talc poudrage. The over-all success rate is 91 percent in the treatment ofpneumothorax (570 of 621) and in pleural effusion(659 of 723). The short-term adverse effects includefever, pain, infection (local and empyema), and res-piratory failure, the latter probably being doserelated. Long-term safety does not appear to be anissue if the asbestos-free product is used. Since thesuccess rate does not appear to be dose related andthere is some evidence to suggest that adverse effectsmay be associated with larger doses, we recommendpleurodesis, via poudrage or slurry, with a 5-g doseof talc.

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