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Status asthmaticus in the medical intensive care unit: A 30-year experience

Objectives To investigate the characteristics, trends in management (permissive hypercapnia; mechanical ventilation (MV); neuromuscular blockade) and their impact on complications and outcomes in Status Asthmaticus (SA).

Methods We performed a retrospective observational study of subjects admitted with SA to a single multidisciplinary MICU over a 30-year period. All laboratory, radiologic, respiratory care, physician notes and orders were extracted from an electronic medical record (EMR) maintained during the entire duration of the study.

Results Two hundred and twenty-seven subjects were admitted with 280 episodes of SA. While subjects reflected our regional population (52% Hispanic), African Americans were over-represented (22%) and Caucasians under-represented (21%). Thirty-eight percent reported childhood asthma, 27% were steroid dependent (10% in the last 10 years), and 18% had a recent steroid taper. One hundred and thirty-nine (61.2%) required intubation. The duration of hospitalization was similar between mechanically ventilated and non-ventilated subjects (5.8±4.41 vs. 6.8±7.22 days; p =0.07). The overall complication rate remained low irrespective of the use of permissive hypercapnia or mode of mechanical ventilation (overall mortality 0.4%; pneumothorax 2.5%; pneumonia 2.9%). The frequency of SA declined significantly in the last 10 years of the study (12.4 vs. 3.2 cases/year).

Conclusions Despite the frequent use of mechanical ventilation, mortality/complication rates remained extremely low. MV did not significantly increase the duration of hospitalization. At our institution, the frequency of SA significantly decreased despite an increase in emergency room visits for asthma.

Current and emerging medical treatments for non–small cell lung cancer: A primer for pulmonologists

Pulmonary physicians commonly develop relationships with lung cancer patients through the evaluation and staging of the disease prior to the discussion of treatment options with oncologists. Given the relationship that develops, a pulmonologist is often asked about aspects of the treatment plan that may be slightly outside of their comfort zone.

The aim of this overview of medical treatment of non–small cell lung cancer is to provide the pulmonologist with an overview of the evidence guiding current practice so that they can be more comfortable answering their patients’ questions while awaiting the expert opinion of the oncologist.

We discuss standard chemotherapeutic agents, their common side effects, and their use in the adjuvant and neoadjuvant setting, as definitive therapy for locally advanced disease, as palliative therapy for advanced disease, and as maintenance therapy.

We also discuss the mechanisms of action and side effects of targeted therapies (including inhibitors of vascular endothelial growth factor [VEGF], epidermal growth factor receptor [EGFR] signaling and the anaplastic lymphoma kinase [ALK] protein), their currently accepted uses, and upcoming phase III trials, the results of which may influence standard practice.

Cause-specific mortality adjudication in the UPLIFT® COPD trial: Findings and recommendations

Mortality is an important endpoint in chronic obstructive pulmonary disease (COPD) trials, although accurately determining cause of death is difficult. In the Understanding the Potential Long-term Impacts on Function with Tiotropium (UPLIFT®) trial, a Mortality Adjudication Committee (MAC) provided systematic, independent and blinded assessment of cause-specific mortality of all 981 reported deaths.

Here we describe this process of mortality adjudication and methodological revisions introduced to help standardise the adjudication of two areas recognised to pose particular difficulty; firstly, the classification of fatal COPD exacerbations that occur in the setting of pneumonia and secondly, the categorisation of sudden death. In addition MAC determined cause of death was compared with that reported by site investigators (SIs). MAC-assigned causes of death were: respiratory, 35%; cancer, 25%; cardiovascular, 11%; sudden cardiac death, 4.4%; sudden death, 3.4%; other, 8.8%; unknown, 12.4%. Cancer/cardiac deaths were more common in Global Initiative for Chronic Obstructive Lung Disease stage II, respiratory deaths in stages III and IV. Agreement between MAC and SI regarding cause of death was complete (50.2%), incomplete (18.5%) or none (31.3%). The SI classified deaths as cardiac three-fold more frequently than MAC (incidence rate [IR]/100 patient-years 0.797 vs. 0.257), although IR ratios for cardiac deaths for tiotropium vs. control were similar between SI and MAC. Discrepancies between MAC- and SI-adjudicated causes of death are common, especially increased reporting of cardiac deaths by the SI.

Future multicentre COPD trials should plan appropriate infrastructure before study initiation to ensure collection and interpretation of fatal events data.

Comparison of tiotropium plus fluticasone propionate/salmeterol with tiotropium in COPD: A randomized controlled study

Background The combination of tiotropium and fluticasone propionate/salmeterol (FSC) is commonly used to treat chronic obstructive pulmonary disease (COPD), but no study had evaluated the effectiveness of tiotropium plus FSC with 250 μg of fluticasone propionate. Our aim was to assess whether tiotropium (18 μg once daily) plus FSC (250/50 μg twice daily) provides better clinical outcomes compared to tiotropium monotherapy.

Methods In this 24-week, randomized, open label, multicenter two-arm parallel study, 479 patients received tiotropium plus FSC (n = 237) or tiotropium alone (n = 242).

Results After 24 weeks of treatment, the triple-inhaled treatment group had a significant improvement in pre-bronchodilator FEV1 (L) compared to the tiotropium-only group (0.090 L vs. 0.038 L; P = 0.005). Regarding health-related quality of life, the mean change in total score on the St. George’s Respiratory Questionnaire for COPD patients (SGRQ-C) was −6.6 points in the tiotropium plus FSC group, but −1.5 points in the tiotropium-only group (P = 0.001). In the subgroup of GOLD stage II patients with COPD, treatment with tiotropium plus FSC also improved FEV1 compared to tiotropium alone (0.088 L vs. 0.030 L; P = 0.011) and improved the total SGRQ-C score than tiotropium alone (−4.5 points vs. −1.0 points, respectively). This triple-inhaled treatment approach did not induce more adverse events, such as pneumonia.

Conclusion Over the course of 24 weeks, FSC (250/50 μg twice daily) added to tiotropium provided greater improvement in lung function and quality of life in patients with COPD (FEV1 ≤ 65%) than tiotropium alone.

HIV and asthma, is there an association?

Objective To evaluate whether asthma and airway hyper-responsiveness are associated with HIV infection.

Methods We reviewed the literature on HIV-associated pulmonary diseases, pulmonary symptoms, and immune changes which may play a role in asthma. The information was analyzed comparing the pre-HAART era to the post-HAART era data.

Results HIV-seropositive individuals commonly experience respiratory complaints yet it is unclear if the frequency of these complaints have changed with the initiation of HAART. Changes in pulmonary function testing and serum IgE are seen with HIV infection even in the post-HAART era. An increased prevalence of asthma among HIV-seropositive children treated with HAART has been reported.

Conclusion The spectrum of HIV-associated pulmonary disease has changed with the introduction of HAART. Current data is limited to determine if asthma and airway hyper-responsiveness are more common among HIV-seropositive individuals treated with HAART.

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