INTRODUCTIONOverlap syndrome between obstructive sleep apnoea (OSA) and chronic obstructive pulmonary disease (COPD) is important but under-recognised. We aimed to determine the prevalence of overlap syndrome and the predictors of OSA in patients with COPD.

METHODSPatients aged ≥ 40 years were recruited from a dedicated COPD clinic and underwent overnight polysomnography. A diagnosis of OSA was made when apnoea-hypopnoea index (AHI) was ≥ 5.

RESULTSIn all, 22 patients (aged 71 ± 9 years), predominantly men, were recruited. Mean values recorded were: predicted forced expiratory volume in the first second percentage 55 ± 15; body mass index 23.7 ± 6.5 kg/m2; Epworth Sleepiness Scale score 5.6 ± 5.8; and AHI 15.8 ± 18.6. Among the 14 patients with OSA (prevalence of overlap syndrome at 63.6%), the mean number of hospital visits for COPD exacerbations in the preceding one year was 0.5 ± 0.7. Patients with overlap syndrome had worse modified Medical Research Council dyspnoea scale scores and a lower percentage of rapid eye movement (REM) sleep than patients without. There were no other statistical differences in lung function or sleep study indices between the two patient groups.

CONCLUSIONThe majority of our patients had overlap syndrome and minimal exacerbations, and were not obese or sleepy. Significant differences between patients with and without overlap syndrome were seen in two aspects - the former was more dyspnoeic and had less REM sleep. Our findings suggest that standard clinical predictors cannot be used for patients with overlap syndrome, and therefore, a high index of suspicion is needed.

Adult ; Aged ; Body Mass Index ; Cohort Studies ; Comorbidity ; Female ; Forced Expiratory Volume ; Hospitals, Teaching ; Humans ; Male ; Middle Aged ; Polysomnography ; Prevalence ; Pulmonary Disease, Chronic Obstructive ; complications ; diagnosis ; Respiratory Function Tests ; Singapore ; Sleep Apnea, Obstructive ; complications ; diagnosis ; Sleep, REM

INTRODUCTIONThis study aimed to assess the effectiveness of medical thoracoscopy (MT) and thoracoscopic talc poudrage (TTP) in patients with exudative pleural effusion.

METHODSWe evaluated the diagnostic yields, complications and outcomes of MT and TTP in 41 consecutive patients with symptomatic pleural effusions who were planned to undergo both procedures from 1 December 2011 to 30 November 2012. Data was reviewed retrospectively and prospectively up to March 2013.

RESULTSAmong the 41 patients, 36 underwent MT with the intent of biopsy and talc pleurodesis, 2 underwent MT for pleurodesis only and 3 had failed MT. Aetiologies of pleural effusion included lung cancer (n = 14), tuberculosis (n = 9), breast cancer (n = 7), ovarian cancer (n = 2), malignant mesothelioma (n = 1), congestive cardiac failure (n = 1), peritoneal dialysis (n = 1) and hepatic hydrothorax (n = 1); pleural effusion was undiagnosed in five patients. The overall diagnostic yield of MT, and the yield in tubercular and malignant pleural effusions were 77.8%, 100.0% and 82.6%, respectively; it was inconclusive in 22.2%. Complications that occurred were self-limiting, with no procedure-related mortality. The 30-day mortality rate was 17.1%. A total of 15 patients underwent TTP. The 30-, 60- and 90-day success rates were 77.8%, 80.0% and 80.0%, respectively, with one patient having complications (i.e. empyema). The 30-day mortality was 40.0%.

CONCLUSIONMT is a safe procedure with high diagnostic yields in undiagnosed pleural effusions. TTP is an effective method to stop recurrence of pleural effusions.

Aged ; Aged, 80 and over ; Biopsy ; Exudates and Transudates ; Female ; Humans ; Male ; Middle Aged ; Neoplasms ; complications ; diagnosis ; Pleural Effusion ; diagnosis ; therapy ; Pleural Effusion, Malignant ; diagnosis ; Pleurodesis ; methods ; Prospective Studies ; Recurrence ; Retrospective Studies ; Talc ; administration & dosage ; Thoracoscopy ; methods ; mortality ; Treatment Outcome ; Tuberculosis ; complications ; diagnosis