Lung cancer diagnosis by trained dogs.

OBJECTIVES: Early lung cancer (LC) diagnosis is key to improve prognosis. We explored here the diagnostic performance of a trained dog to discriminate exhaled gas samples obtained from patients with and patients without LC and healthy controls. METHODS: After appropriate training, we exposed the dog (a 3-year-old cross-breed between a Labrador Retriever and a Pitbull) to 390 samples of exhaled gas collected from 113 individuals (85 patients with LC and 28 controls, which included 11 patients without LC and 17 healthy individuals) for a total of 785 times. RESULTS: The trained dog recognized LC in exhaled gas with a sensitivity of 0.95, a specificity of 0.98, a positive predictive value of 0.95 and a negative predictive value of 0.98. The area under the curve of the receiver-operating characteristics curve was 0.971. CONCLUSIONS: This study shows that a well-trained dog can detect the presence of LC in exhaled gas samples with an extremely high accuracy.

Benchmarking in Thoracic Surgery. Third Edition.

INTRODUCTION: Benchmarking entails continuous comparison of efficacy and quality among products and activities, with the primary objective of achieving excellence. OBJECTIVE: To analyze the results of benchmarking performed in 2013 on clinical practices undertaken in 2012 in 17 Spanish thoracic surgery units. METHODS: Study data were obtained from the basic minimum data set for hospitalization, registered in 2012. Data from hospital discharge reports were submitted by the participating groups, but staff from the corresponding departments did not intervene in data collection. Study cases all involved hospital discharges recorded in the participating sites. Episodes included were respiratory surgery (Major Diagnostic Category 04, Surgery), and those of the thoracic surgery unit. Cases were labelled using codes from the International Classification of Diseases, 9th revision, Clinical Modification. The refined diagnosis-related groups classification was used to evaluate differences in severity and complexity of cases. RESULTS: General parameters (number of cases, mean stay, complications, readmissions, mortality, and activity) varied widely among the participating groups. Specific interventions (lobectomy, pneumonectomy, atypical resections, and treatment of pneumothorax) also varied widely. CONCLUSIONS: As in previous editions, practices among participating groups varied considerably. Some areas for improvement emerge: admission processes need to be standardized to avoid urgent admissions and to improve pre-operative care; hospital discharges should be streamlined and discharge reports improved by including all procedures and complications. Some units have parameters which deviate excessively from the norm, and these sites need to review their processes in depth. Coding of diagnoses and comorbidities is another area where improvement is needed.

[Impact of a rescue program on the operability of patients with bronchogenic carcinoma and chronic obstructive pulmonary disease]. / Influencia de un programa de rescate en la decisión quirúrgica en pacientes con carcinoma broncogénico y EPOC.

OBJECTIVE: Bronchogenic carcinoma and chronic obstructive pulmonary disease (COPD) are strongly associated in our setting, occurring together in around 70% of cases. Approximately 60% of COPD patients who require resection for bronchogenic carcinoma are considered unfit for surgery because of seriously impaired lung function. The purpose of this study was to evaluate the extent to which a rescue program could improve lung function in COPD patients who had previously been considered unfit for surgery because of poor lung function. PATIENTS AND METHODS: The study enrolled COPD patients who had not been considered for surgical resection because they had a predicted postoperative forced expiratory volume in 1 second (FEV1) of less than 1 L. All of the patients participated in a 2-week rescue program that involved optimization of drug treatment (inhaled bronchodilators and/or corticosteroids) and intensive respiratory physiotherapy. Lung function was analyzed before and after the program. RESULTS: We evaluated 30 patients (26 men and 4 women) with a mean (SD) age of 66.7 (8.15) years and an initial FEV1 of 1.497 (0.27) mL (FEV1% of 55.7% [20.14%]). None of the patients had respiratory failure (PaO2 of 77.0 [9.4] mm Hg and PaCO2 of 41.6 [2.4] mm Hg). Twenty-four patients (80%) showed significant improvement in lung function (P< .001) after the program and were admitted for resection. Two wedge resections, 18 lobectomies, 2 pneumonectomies, and 2 exploratory thoracotomies were performed (based on oncologic indications). Nineteen of the 24 patients who underwent surgery had no complications. Two patients had prolonged air leaks, 1 empyema, and 1 hemothorax. One patient died from sepsis. CONCLUSIONS: A large number (80%) of COPD patients previously considered unfit for surgical resection because of seriously impaired lung function can be admitted for surgery following an intensive drug and respiratory physiotherapy rescue program.