Talc pleurodesis for secondary pneumothorax in elderly patients with persistent air leak
Original Article

Talc pleurodesis for secondary pneumothorax in elderly patients with persistent air leak

Takuya Watanabe1, Ichiro Fukai2, Katsuhiro Okuda1, Satoru Moriyama1, Hiroshi Haneda1, Osamu Kawano1, Keisuke Yokota1, Masayuki Shitara2, Tsutomu Tatematsu1, Tadashi Sakane1, Risa Oda1, Ryoichi Nakanishi1

1Department of Oncology, Immunology and Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan;2Department of Thoracic Surgery, Suzuka General Hospital, Suzuka, Japan

Contributions: (I) Conception and Design: T Watanabe, K Okuda, I Fukai; (II) Administrative support: R Nakanishi; (III) Provision of materials or patients: T Watanabe, I Fukai, O Kawano, K Yokota, M Shitara; (IV) Collection and assembly of data: S Moriyama, H Haneda, T Tatematsu, T Sakane, R Oda; (V) Data analysis and interpretation: T Watanabe, K Okuda; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors.

Correspondence to: Katsuhiro Okuda, MD, PhD. Department of Oncology, Immunology and Surgery, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan. Email: kokuda@med.nagoya-cu.ac.jp.

Background: We herein report the usefulness of two types of talc pleurodesis for secondary pneumothorax of elderly patients with persistent air leak who have severe pulmonary emphysema.

Methods: We assessed 17 elderly patients with persistent air leak who received talc pleurodesis for secondary pneumothorax from April 2013 to March 2017. Thoracoscopic talc poudrage (TTP) (n=11) was performed in patients whose general condition was thought to sufficiently stable to tolerate for general anesthesia. Talc slurry pleurodesis (TSP) (n=6) via a chest tube was performed in patients whose general condition was thought to be insufficiently stable to tolerate general anesthesia.

Results: The median drainage period after pleurodesis was 6 days in patients who received TTP and 12 days in patients who received TSP. Complications associated with talc pleurodesis included atrial fibrillation (n=1) in the thoracoscopic poudrage group, while the slurry pleurodesis group showed chest pain (n=2), asthmatic attack (n=1), and pneumonia (n=1). All patients who received thoracoscopic poudrage were able to leave the hospital after removal of the chest tube. Five of the six patients who received slurry pleurodesis were able to leave the hospital, but one of them died of acute exacerbation of interstitial pneumonia (IP) on the 45th day after pleurodesis. The success rate was 94% (16/17). There were no cases of recurrence during the observation period.

Conclusions: TTP was deemed likely to be safe and effective for patients able to tolerate general anesthesia. In patients with IP, especially those treated with steroids, the indication of talc pleurodesis should be cautiously considered.

Keywords: Pleurodesis; talc poudrage; talc slurry; secondary pneumothorax; elderly

Submitted Sep 16, 2018. Accepted for publication Dec 11, 2018.

doi: 10.21037/jtd.2018.12.85

Introduction

Treatments for secondary pneumothorax of elderly patients with pulmonary emphysema are often difficult because of the poor performance status (PS) and impaired pulmonary function. Pleurodesis is often effective in cases unable to tolerate surgical procedures (1-4). Of the many sclerosing agents, talc is considered to be the most effective and least expensive and is widely used based on the British Thoracic Society (BTS) guidelines (1,4-8). We adopted two treatment strategies using talc for secondary pneumothorax in elderly patients with persistent air leak who were ill-suited for standard pneumothorax therapies, including any interventional treatments.

We herein report the effectiveness of thoracoscopic talc poudrage (TTP) and talc slurry pleurodesis (TSP) via a chest tube for secondary pneumothorax in elderly patients with severe emphysema.

Methods

We assessed 17 elderly patients (over 65 years of age) with persistent air leak who received talc pleurodesis for secondary pneumothorax with severe emphysema from April 2013 to March 2017. Persistent air leak was defined as the medical condition of ongoing air leak for more than five days and no decrease in the amount of air leaking after the start of thoracic drainage (9,10). We confirmed that all patient’s lung was sufficiently expanding to the chest wall using computed tomography (CT) scan before talc pleurodesis.

The study was approved by institutional ethics committee board of Suzuka General Hospital (No. 186) and informed consent was obtained from all of the patients.

Japanese Pharmacopoeia talc was sterilized by dry heat at 200 °C for 3 h and used after cooling. The average particle diameter of this talc was 11.7 µm.

The indication for TTP was comprehensively determined based on the patients’ PS, cardiopulmonary function, comorbidity, and expansion of the lung. In patients able to tolerate general anesthesia, TTP (n=11) was performed. Four of the 11 patients in whom air leak was detected intraoperatively received pulmonary wedge resection to control persistent air leak. After poudrage using 10 g of talc, 2 chest tubes were placed (1 at the apex of the pleural cavity and 1 above the diaphragm). In patients unable to tolerate general anesthesia, TSP (n=6) was performed. Talc (10 g) dissolved in 200 mL saline solution was injected via the chest tube at the bedside.

In either approach, a continuous suction pressure of −20 cmH2O was applied until thoracic tube was removed. All patients took orally nonsteroidal anti-inflammatory drugs three times a day for one week after talc pleurodesis.

The subjects were classified into two groups of TTP and TSP according to the treatment strategies. We retrospectively examined the demographics, treatment-related variables (including complications), and outcomes. Continuous variables were expressed as the median and range. Categorical variables were presented as a number and percentage. The analyses between the two groups were performed using Wilcoxon’s rank sum test for continuous variables and Fisher’s exact test and a Chi-squared analysis for categorical variables. A p value of <0.05 was considered statistically significant. The statistical analyses were performed using the JMP software program (version 12.0.1; SAS Institute, Tokyo, Japan).

Results

The median age was 75 (range, 65–90) years old; 6 patients (35.3%) were over 80 years of age. All patients in the study population were men. Regarding the affected side, 11 cases were affected on the right, 5 cases on the left, and 1 case on both sides. Four patients had a poor general condition (PS ≥2) and received TSP therapy. Comorbid lung disease aside from pulmonary emphysema included bronchial asthma (n=2) and interstitial pneumonia (IP) (n=4). The median drainage period before pleurodesis was 11 (range, 5–35) days (Table 1). The median drainage period after pleurodesis was 7 (range, 2–35) days. The TTP group showed a significantly shorter drainage period after pleurodesis than the TSP group (TTP: median, 6 days; TSP: median, 12 days; P=0.005). In the TTP group, no significant difference was found in the drainage period after pleurodesis between the four patients who received pulmonary wedge resection and the others (P=0.088).

Table 1
Table 1 Demographic data
Full table

Complications after pleurodesis included atrial fibrillation (n=1) in the TTP group and chest pain (n=2), bronchial asthma attack (n=1), and pneumonia (n=1) in the TSP group (Table 2). All patients in the TTP group were discharged after pleurodesis. One patient in the TSP group in whom the air leak continued after pleurodesis died in the hospital due to acute exacerbation of IP on the 45th day after pleurodesis. The success rate was 94% (16/17). All patients visited our hospital every 3–6 months for observation after discharge. There were no cases of recurrence among the successfully treated cases during the observation period (median, 24 months; range, 2–75 months).

Table 2
Table 2 Results of talc pleurodesis
Full table

Discussion

Secondary pneumothorax sometimes develops in elderly patients with pulmonary emphysema (4). Secondary pneumothorax of elderly patients is more difficult to treat than primary pneumothorax due to these patients’ various comorbidities, poor PS, and impaired cardiopulmonary function (1-4). If an air leak cannot be stopped with thoracic drainage alone, it is necessary to apply additional treatment. However, there are some cases in which surgical intervention is not possible due to severe emphysema or the patient’s condition being too poor to tolerate general anesthesia. In such cases, pleurodesis is indicated as an effective therapy (1-4). When treating secondary pneumothorax, we must also consider the prevention of recurrence of pneumothorax, given the high recurrence rate (39% to 80%) and mortality rate (4.1%) associated with complications of pneumothorax (3,11-14).

A number of sclerosing agents for pleurodesis have been developed, among which talc is considered to be the most effective and least expensive. Talc is therefore widely used for chemical pleurodesis in European countries based on the BTS guidelines (1,4-8,15,16). In clinical practice in Japan, OK-432 (a pulverized product of heat-killed Streptococcus pyogenes) and minocycline are mainly used, but the recurrence rates associated with using these agents for pleurodesis are reportedly high (17-20), and complications, such as a fever and chest pain after pleurodesis, were found to be severe when compared with talc (4,20,21).

Many reports have shown the success rate of talc pleurodesis in the treatment of pneumothorax (defined as the percentage of patients whose thoracic tube is removed) to exceed 80% (1,5), and a meta-analysis showed that the overall success rate (defined as the percentage of patients without relapse after pleurodesis) was 91% (16,17,22). Although there are several reports of talc pleurodesis for spontaneous pneumothorax, including primary pneumothorax, there has been no reports on the utility of talc pleurodesis limited to secondary pneumothorax in elderly patients with persistent air leak. To our knowledge, only one study has directly compared TTP and TSP for secondary pneumothorax in patients over 50 years of age (23). In the present study, the success rate was 94%, which was better than those described in previous reports not limited to secondary pneumothorax (16,17,22). Furthermore, there were no cases of recurrence among the successfully treated patients in our study during the observation period. Talc pleurodesis was therefore deemed effective for the prevention of recurrence in patients with severe emphysema.

The most promising point of TTP is that the talc can be uniformly and intensively sprayed onto the points of severe air leak. In addition, the chest tube can be placed in the appropriate position. As a result, TTP has a significantly shorter drainage duration after pleurodesis than TSP. A report has described the successful performance of TTP under local anesthesia (1). With this method, it is possible to perform talc poudrage and place the chest tube in the proper position as with general anesthesia, thereby further expanding the indications for talc pleurodesis.

In the present study, pleurodesis failed in one patient with IP who had been treated with steroids. The position of the chest tubes was appropriate, and CT scan confirmed that the lung was sufficiently expanded to the chest wall, so TSP was performed. However, no adhesion was formed at all, and the air leak continued even after pleurodesis. In the other three patients who had IP as a basic disease but did not require steroid treatment, TSP was successful. Adhesion is believed to be difficult to form in patients treated with steroids due to the immunosuppressive reaction caused by the steroids (24,25). Acute exacerbation of IP or acute respiratory distress syndrome (ARDS) after talc pleurodesis mostly occurs within 48 h (7,26). One patient with IP who died had no findings of exacerbation before pleurodesis. He got acute exacerbation on the 42nd day after pleurodesis, and died on the 45th day, three days after the exacerbation. So, it is thus unlikely that the talc caused acute exacerbation in the patient. Talc pleurodesis for patients with IP should thus be cautiously indicated. When talc pleurodesis is planned in patients with IP, it should be confirmed that no other treatment is available for secondary pneumothorax, and adequate preparation should be performed in order to prevent ARDS and the acute exacerbation of IP.

Care should also be taken concerning the amount of talc used and the particle size. Previous reports have warned that the risk of developing ARDS is high when the amount of talc exceeds 10 g (27,28), and many studies related to talc pleurodesis have limited the use to a maximum of 5 g (1,5,16,22,29). In addition, talc with small particles migrates to the whole body through the pleural stomata (6,8,30) and causes systemic inflammation (15,31,32) and respiratory failure, including ARDS. It is thus necessary to use “graded talc” (with a large and uniform average particle size) (5,16,24,29). Based on these findings, using 5 g graded talc is thought to be better (17). In the present study, 10 g of talc was used, but we are now using 4 g of Unitalc® (Nobelpharma Co., Ltd., Tokyo, Japan). However, there is a report of ARDS developing even when only 2 g of graded talc was used (26), so sufficient observation and examinations of patients after talc pleurodesis are indispensable.

The main limitations of our study were the small number of patients and its retrospective design. Differences in the patient demographics between the two groups resulted in treatment selection bias. But our study was limited to elderly (>65 years of age) patients with persistent air leak who were ill-suited for standard pneumothorax therapies including any interventional treatments. We think that the patient background as described above is a distinctive point compared with other reports. Talc pleurodesis is not indication for all secondary pneumothorax patients and should be adapted for selected patients such as our study. We would like to provide good information obtained by two types of talc pleurodesis for secondary pneumothorax in elderly patients with persistent air leak. Larger prospective studies are needed to determine the best adaptation of talc pleurodesis for secondary pneumothorax in elderly patients, the most effective amount of talc, and precautions for complications.

TTP was deemed likely to be safe and effective in patients able to tolerate general anesthesia. When considering treatment with talc pleurodesis, caution should be exercised concerning its indication for steroid-dependent patients.

Acknowledgements

None.

Footnote

Conflicts of Interest: The authors have no conflicts of interest to declare.

Ethical Statement: The study was approved by institutional ethics committee board of Suzuka General Hospital (No. 186) and informed consent was obtained from all of the patients.

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Cite this article as: Watanabe T, Fukai I, Okuda K, Moriyama S, Haneda H, Kawano O, Yokota K, Shitara M, Tatematsu T, Sakane T, Oda R, Nakanishi R. Talc pleurodesis for secondary pneumothorax in elderly patients with persistent air leak. J Thorac Dis 2019;11(1):171-176. doi: 10.21037/jtd.2018.12.85

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