THORACOSCOPE MANAGEMENT OF MALIGNANT PLEURAL EFFUSIONS

Bedside pleuroscopy in Taiwan : a great vision for critically-ill patients and intensivists

Bedside pleuroscopy can be used in daily practice by medical pulmonologists if a patient cannot tolerate either general anesthesia or being moved to an operating or endoscopy room due to their critical condition. It is a simple and safe technique that rarely has complications. The aim of this review is to summarize recent literatures about bedside pleuroscopy and share our experiences with using it in Taiwan.

The Portsmouth thoracoscopy experience, an evaluation of service by retrospective case note analysis

Occupational asbestos exposure has been endemic in Portsmouth. A retrospective case note analysis of 50 patients who underwent thoracoscopy over a 2-year period from January 2003 was undertaken. Biopsies were taken in 47 cases, 31 of which showed malignant mesothelioma. Thirty seven percent of those without a history of direct exposure to asbestos had mesothelioma, implying that even in the absence of an exposure history a low threshold for investigation should be adopted for the local population. There was no mortality or significant morbidity associated with the procedure. Medical thoracoscopy is safe and effective in the diagnosis of benign and malignant pleural disease particularly in this high risk population.

Frozen section of pleural biopsies at medical thoracoscopy assists in correctly identifying benign disease

OBJECTIVES

Medical thoracoscopy and thoracoscopic talc poudrage (TTP) are accepted procedures in the management of pleural effusions. The relative merits of TTP compared with pleurodesis via intercostal catheter (ICC) continue to be debated. However, of the two procedures, only medical thoracoscopy allows both tissue diagnosis and pleurodesis to be achieved reliably in one procedure. The aim of this study was to assess the feasibility and accuracy of using frozen section analysis of samples taken during medical thoracoscopy to assist the thoracoscopist's decision to complete the procedure with a TTP.

METHODOLOGY

Twenty patients with undiagnosed pleural effusions after at least one diagnostic pleurocentesis underwent medical thoracoscopy and biopsy.

RESULTS

Frozen sections were easily performed within the timeframe of medical thoracoscopy. The final diagnosis based on paraffin sections was malignant in 10 cases and benign in 10 cases. Frozen section at the time of thoracoscopy (before TTP) correctly identified nine of 10 cases as being benign and six of 10 cases as malignant. In the malignant group, reasons for incorrect identification as benign were sampling from superficial benign adipose tissue overlying the malignant deposits, difficult access to the most involved parts of the pleura and intense cellular infiltrate initially thought to be benign.

CONCLUSION

Frozen sections taken during medical thoracoscopy have the potential to facilitate decision-making prior to pleurodesis, particularly for accurate identification of benign histology on thoracoscopic pleural biopsies, in order that pleurodesis is not performed unnecessarily.

Outpatient Management of Malignant Pleural Effusions with Small-Bore, Tunneled Pleural Catheters

BACKGROUND

Malignant pleural effusions (MPEs) can produce significant respiratory symptoms and diminished quality of life in patients with terminal malignancies. Control of MPEs to palliate respiratory symptoms can be performed via several different approaches. Ideally, a minimally invasive procedure to control MPEs and to provide relief of respiratory symptoms would be optimal.

OBJECTIVE

To ascertain if control of MPEs can be achieved by outpatient management via a small-bore pleural catheter (PC) without the need for sclerosing agents.

METHODS

Retrospective chart analysis of 24 patients after outpatient insertion of PCs for recurrent, symptomatic MPEs followed by frequent home drainage of pleural fluid to relieve respiratory symptoms.

RESULTS

Symptomatic relief of respiratory symptoms was achieved in 100% of patients, while pleurodesis was achieved in 58% of patients in a mean of 39 days. Five patients (6 PCs) expired with the catheters in place. In these patients, all catheters remained in position and functional until the patients ultimately died from nonpleural disease progression. No major complications occurred during insertion of the catheter. Late complications included localized cellulitis and bacterial superinfection in three patients and tumor growth at the catheter site in one patient.

CONCLUSIONS

The PCs used in the present study provided an effective modality not only to alleviate respiratory symptoms associated with MPE, but also to achieve pleurodesis in 58% of our patients. These catheters may provide a significantly less invasive outpatient approach to the palliative management of MPEs.

Management of malignant pleural effusions

Malignant pleural effusion is a common clinical problem. Evacuation of the pleural fluid and prevention of its reaccumulation are the main aims of management. Pleurodesis should be attempted early, although considerable practice variations exist in the way it is performed. There is a lack of consensus among respiratory physicians worldwide on the optimal method and agent for pleurodesis. Talc remains the most commonly used pleurodesing compound in most countries. While talc produces a higher success rate than other compounds, it generates more side-effects. The association between talc and ARDS continues to be debated. Ambulatory small-bore pleural catheter drainage followed by intrapleural instillation of a pleurodesing agent is increasingly accepted as an alternative to conventional in-patient pleurodesis. Development of novel methods to control pleural fluid formation should be made a high priority in future pleural research.

Therapeutic thoracoscopy

Thoracoscopy provides a minimally invasive window to the pleural space, lung, and mediastinum. Further advances prompted by improvements of specifically designed endoscopic instruments and procedural techniques are expected. There is no doubt that thoracoscopy has a place among therapeutic procedures in the chest. The time-proven principles of thoracic surgical intervention, particularly in regard to patients with cancer, however, must not be neglected. A beckoning window always offers new opportunities, but the open door of classic surgical techniques should not be ignored.

Treatment of malignant pleural effusion: pleurodesis using a small percutaneous catheter. A prospective randomized study

The aim of this prospective, randomized study was to investigate the possibility of performing pleurodesis using a small percutaneous catheter (Cystofix catheter, CH10, 65 cm) inserted at bedside in patients with recurrent malignant pleural effusion and to compare this catheter with a conventional large bore chest tube (CH24) placed in connection with diagnostic thoracoscopy. After drainage pleurodesis was performed with tetracycline as sclerosing agent. Of 18 evaluable consecutive patients (mean age 67.8 years) nine were randomized for pleurodesis with the small and nine for the large catheter. In the former group, the majority (seven of nine) did not find insertion of the catheter more unpleasant than thoracentesis. In the latter group only a few (two of nine) found insertion comparable with thoracentesis (P < 0.05). All patients found the presence of the large catheter very or somewhat unpleasant (two and seven patients), whereas this was only the case for a few (no and two patients) treated with the small catheter (P < 0.05). In the former group three patients required new thoracentesis, whereas this was only the case for two patients in the latter group (P > 0.05). No complications were seen. We conclude that pleurodesis in patients with recurrent malignant pleural effusion can be performed with a small percutaneous catheter (Cystofix) with an effect similar to that obtained with a large-bore chest tube and with less discomfort for the patient.