PulmCCM

The PulmCCM team writes the posts under this moniker. Read the About page for more of the PulmCCM story.

Sep 222011
 

Observational epidemiologic data on 132 California kids who caught pertussis (of 15,000 in a cohort), presented at the American Society for Microbiology meeting last week, suggested that protection from pertussis vaccination may wane as soon as 3 years after the last dose. Kids age 8-12 were most at risk (the last dose is given at [… read more]

Sep 172011
 

Surprisingly little is really known about airway remodeling in asthma, including its clinical course, or how treatment may modify it. Two examples: rather than occurring as a late sequela of unchecked inflammation, numerous recent studies show remodeling can occur in tandem with inflammation starting in early childhood. A recent NEJM article generates the hypothesis that [… read more]

Sep 132011
 

West et al report survey and in-service exam data from 16,394 internal medicine residents nationwide, 2008-2009. Almost 15% reported that their lives “suck” or “profoundly suck” (I’m paraphrasing slightly). About half reported emotional exhaustion or feeling burned-out. Almost 30% were in a disconnected, fugue-like state. The really depressed ones did worse on their in-service exams, [… read more]

Sep 132011
 
Millions of adults quit smoking since 2005 (MMWR)

From 2005 to 2010, the percent of U.S. adults identifying themselves as smokers fell from 20.9% to 19.3% — about 3 million fewer smokers than would be expected. The results come from the CDC’s national telephone health surveys. More remarkably, adults reported smoking far fewer cigarettes: The proportion of adults reporting smoking more than a [… read more]

Sep 122011
 

Skeletal muscle dysfunction is common in people with COPD, although debate exists as to whether that’s simply due to deconditioning, or something more. In people with severe COPD (GOLD stage III and IV), it’s known that pulmonary rehabilitation improves some of these muscle abnormalities. Vogiatzis et al report the results of putting 46 people with [… read more]

Sep 112011
 

An impedance threshold device (essentially a one-way valve) attached to an endotracheal tube prevents air from leaving the chest during compressions, improving venous return, cardiac output and (in animal studies) perfusion. Auferheide and the ROC investigators report results of a huge randomized trial testing the ITD. 8,718 victims of out-of-hospital cardiac arrest were randomized to [… read more]

Sep 112011
 

Stiell et al (the ROC investigators) report results of a 10-center randomized trial in the U.S. and Canada. Among 9,933 patients with out-of-hospital cardiac arrest randomized to receive either 30-60 seconds or 2 minutes of uninterrupted CPR before rhythm analysis, there were no differences in survival, or survival to discharge with good functional status (primary [… read more]

Sep 112011
 

ATS / ERS guidelines recommend using % predicted FEV1 as the metric to define severity of obstructive, restrictive, and mixed ventilatory disorders. The main driver: FEV1 is the most robust variable as an overall measure of health (epidemiologically speaking). Critics charge that this overestimates severity of obstruction when restriction is also present, causing confusion, misdiagnosis, [… read more]

Sep 102011
 

Asthma’s complex and protean inflammatory processes vary between individuals, some of whom have elevated levels of interleukin-13 despite maximal treatment with inhaled steroids. IL-13 prompts airway epithelial cells to secrete periostin, which acts on fibroblasts and may contribute to airway remodeling in asthma. Lebrikizumab is a monoclonal antibody inhibiting IL-13. Corren et al used a [… read more]

Sep 082011
 

Part 1 of Levine et al’s excellent review on toxicology in the ICU. Some of their helpful recommendations/reminders: False positive UDS are common for tricyclics (diphenhydramine/Benadryl, carbamazepine, quetiapine/Seroquel), as are false negatives for benzodiazepines (lorazepam/Ativan, alprazolam/Xanax). The osmolal gap is elevated in ethanol, methanol, ethylene glycol, isopropanol, propylene glycol toxicity, but also in shock and [… read more]

Sep 062011
 

Enriquez et al analyzed data from the NHLBI Dynamic Registry, comparing 860 people with COPD to 10,048 without who underwent percutaneous coronary intervention between 1999-2006. Their main findings: COPD patients were sicker and had worse outcomes. Demographically, they had a higher rate of diabetes, slightly more lesions (3.2 vs. 3.0), and slightly lower ejection fractions. Only [… read more]

Sep 032011
 

Everything new in COPD from the 10th Lund COPD Symposium, including biomarkers, risk factors, research into systemic effects and exacerbation prevention, and the latest cutting edge treatment: “Activity Promotion” (the article declares this a “paradigm shift” …. but wasn’t trying to get people to move more also part of the old paradigm?) Proc Am Thorac [… read more]

Sep 022011
 

September’s Current Opinion in Pulmonary Medicine has 4-5 review articles each on sarcoidosis (how to handle calcium problems; cardiac sarcoid); interstitial lung disease (biologics for connective-tissue disease related ILD; LAM therapies; stem cell therapy for pulmonary fibrosis), and pulmonary vascular disease. Curr Opin Pulm Med 2011;17.

Aug 312011
 

Grijalva et al analyzed the Nationwide Inpatient Sample (data from U.S. hospitalizations) and found that the rate of hospitalization for parapneumonic empyema doubled from 3 per 100,000 in 1996, to 6 in 2008. The rate of empyemas due to Streptococcus pneumoniae was stable; the increases were in non-pneumococcal infections like Staphylococcus. Mortality was unchanged overall [… read more]

Aug 302011
 

It’s long been known in the pediatric cystic fibrosis population that exacerbations accelerate decline of lung function. de Boer et al show that exacerbations are just as bad or worse in adults. Following 446 adults with CF in Ontario for 3 years, those with >2 exacerbations per year had a hazard ratio of 4.05 for [… read more]