Wrist-Sensor Pulse Oximeter Enables Prolonged Patient Monitoring in Chronic Lung Diseases.

Pulse oximetry is an important diagnostic tool in monitoring and treating both in-patients and ambulatory patients. Modern pulse oximeters exploit different body sites (eg fingertip, forehead or earlobe). All those are bulky and uncomfortable, resulting in low patient compliance. Therefore, we evaluated the accuracy and precision of a wrist-sensor pulse oximeter (Oxitone-1000, Oxitone Medical) vs. the traditional fingertip device. Fifteen healthy volunteers and 23 patients were recruited. The patient group included chronic obstructive pulmonary disease (COPD) (N = 8), asthma (N = 6), sarcoidosis (N = 5) and others. Basic demographic data, skin tone type, smoking status and medical history were recorded. Blood oxygen level (SpO2) and pulse-rate values were determined by a non-invasive pulse oximeter (Reference, a conventional FDA-cleared fingertip pulse oximeter) and by Oxitone-1000. All tests were performed in singleton and in a blinded fashion. The measurements were done in sitting and standing positions, as well as after a 6-min walk test. The mean age was 60.4 ± 9.83 years, 55% were male. No significant differences were observed between the wrist-sensor and the traditional fingertip pulse oximeters in all tested parameters. Mean SpO2 was 96.45% vs. 97.18% and the mean pulse was 74.64 vs. 74.6 bpm (Oxitone-1000 vs. Reference, respectively, p < 0.0001). Precision rate was 2.28472% and the accuracy was met (Arms -Root mean-square-error < 3%). The Oxitone-1000 is both accurate and precise for SpO2 and pulse measurements during daily activities of pulmonary patients, and is not inferior to standard devices for spot checking or short period examinations. Its wrist-sensor design is comfortable and provides the advantage of extended use.

EBUS-TBNA is Sufficient for Successful Diagnosis of Silicosis with Mediastinal Lymphadenopathy.

BACKGROUND: Silicosis is an occupational lung disease resulting from inhalation of respirable crystalline silica. Recently, an international silicosis epidemic has been noted among artificial stone workers. OBJECTIVE: Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is currently used for patients with unexplained lymphadenopathy. Since silicosis may present with prominent lymphadenopathy, the diagnostic yield of EBUS-TBNA in diagnosing silicosis was evaluated. METHODS: Twenty-eight patients with suspected silicosis referred for outpatient evaluation in three large tertiary hospitals were evaluated. Patients with mediastinal lymphadenopathy underwent EBUS-TBNA, while others underwent TBB and/or video-assisted thoracoscopic surgery (VATS). RESULTS: Eleven patients with mediastinal lymphadenopathy (39%) were evaluated using EBUS-TBNA. The diagnosis was accurate in all cases, demonstrating silica particles under polarized light, with no complications. Among the remaining patients, TBB was only 76% diagnostic, therefore requiring VATS. CONCLUSIONS: EBUS-TBNA is a useful and sufficient tool to diagnose silicosis in patients with mediastinal lymphadenopathy along compatible exposure histories.

[Tuberculosis among patients in Israel with anti-TNF].

Treatment with anti-TNF increases the rate of the reactivation of latent tuberculosis (TB) infection. We present five case reports of patients who were treated with anti-TNF and developed active TB infection. Physicians should be aware of this possible complication and should conduct screening with the purified protein derivative test (PPD) or the interferon gamma release assay (IGRA) before anti-TNF treatment.

[ENDOSCOPIC ULTRASOUND EXAMINATION IN ELDERLY LUNG PATIENTS: OUR EXPERIENCE AT MEIR MEDICAL CENTER].

INTRODUCTION: The endobronchial ultrasound (EBUS) examination is the prime choice in patients with unexplained mediastinal lymphadenopathy. We summarize our experience at Meir Medical Center with EBUS in the elderly (over 75 years of age) patients with lung cancer including indications, benefits and risks factors. METHODS: The study included 20 patients over the age of 75, 13 men and 7 women. The average age was 81 ± 5 years. Indications included 11 patients with lung cancer and nine patients with mediastinal lymphadenopathy. Sixteen patients (80%] were diagnosed by the EBUS. Three patients needed a further diagnostic procedure. There was test accuracy in 18 of 20 patients (90%). Side effects included: One patient developed severe cough and another patient developed hypoxemia without the need for respiration, no bleeding was observed and there were no decreases in blood pressure. There was no arrhythmia or other complications. All patients were released on the examination day. CONCLUSIONS: The efficacy and safety of EBUS in the elderly are similar to the conditions for the general population. There were no significant complications observed including bleeding or arrhythmias.

Incidence of bacteremia following bronchoscopy with argon plasma coagulation: a prospective study.

BACKGROUND: This evaluation was undertaken to determine the incidence of bacteremia and infectious complications associated with argon plasma coagulation (APC) procedures. METHODS: Consecutive patients undergoing bronchoscopy with APC for treatment of endobronchial lesions were studied. Venesection was performed for blood cultures within 60 s of the APC procedure. APC catheter washings were cultured. Patients with positive blood cultures were reviewed immediately. All patients underwent clinical review 1 and 12 weeks after APC. RESULTS: Forty-two patients underwent 44 APC procedures. Their mean age was 66 ± 12 years. One case (2.3 %) had bacteremia with Acinetobacter lwolfii. APC catheter washing culture was positive in 14 (31.8 %) procedures. No patient had clinical features suggesting infection and there were no complications. Phone review after 1 week revealed no complications. After 3 months, 8 (18 %) had died, all related to advanced lung malignancy and not to the APC procedure. CONCLUSIONS: APC does not appear to increase the risk of bacteremia compared to airway insertion of the bronchoscope. Although contamination of the APC catheter with oropharyngeal commensal bacteria is common, clinically significant infection following the APC procedure is rare.

Inhaled Tranexamic Acid for Hemoptysis Treatment: A Randomized Controlled Trial.

BACKGROUND: Tranexamic acid (TA) is an antifibrinolytic drug currently used systemically to control bleeding. To date, there have been no prospective studies of the effectiveness of inhaled TA for the treatment of hemoptysis. OBJECTIVES: The goal of this study was to prospectively assess the effectiveness of TA inhalations (ie, nebulized TA) for hemoptysis treatment. METHODS: This analysis was a double-blind, randomized controlled trial of treatment with nebulized TA (500 mg tid) vs placebo (normal saline) in patients admitted with hemoptysis of various etiologies. Patients with massive hemoptysis (expectorated blood > 200 mL/24 h) and hemodynamic or respiratory instability were excluded. Mortality and hemoptysis recurrence rate were assessed at 30 days and following 1 year. RESULTS: Forty-seven patients were randomized to receive TA inhalations (n = 25) or normal saline (n = 22). TA was associated with a significantly reduced expectorated blood volume starting from day 2 of admission. Resolution of hemoptysis within 5 days of admission was observed in more TA-treated patients than in those receiving placebo (96% vs 50%; P < .0005). Mean hospital length of stay was shorter for the TA group (5.7 ± 2.5 days vs 7.8 ± 4.6 days; P = .046), with fewer patients requiring invasive procedures such as interventional bronchoscopy or angiographic embolization to control the bleeding (0% vs 18.2%; P = .041). No side effects were noted in either group throughout the follow-up period. In addition, a reduced recurrence rate was noted at the 1-year follow-up (P = .009). CONCLUSIONS: TA inhalations can be used safely and effectively to control bleeding in patients with nonmassive hemoptysis. TRIAL REGISTRY: ClinicalTrials.gov; No.: NCT01496196; URL: www.clinicaltrials.gov.

The role of bacterial culture by bronchoscopy in patients with lung cancer: a prospective study.

BACKGROUND: Patients with lung cancer undergoing surgical and medical treatment are at increased risk for pulmonary complications. The importance of routine bronchoscopy procedure in populations with lung cancer has rarely been defined. We aimed to determine the growth of potentially pathogenic microorganisms (PPM) among patients evaluated by bronchoscopy for lung cancer. METHODS: This prospective study included 155 consecutive patients with lung mass or radiologic findings suspicious for malignancy. Baseline demographic, clinical and radiologic features were collected. Clinical features of infection were compared to microbiologic and histologic results. RESULTS: The bacterial spectrum of lung cancer patients was similar to those without malignancy. The most frequently isolated organisms were Pseudomonas sp. and Staphylococcus aureus. Among all patients, bronchial bacterial positive PPM growth was noted in 30% (46/155). The significant PPM growth rate was three-fold higher among those with clinical signs of infection (P<0.001). Interestingly, 30 of these 46 patients (66%) did not show signs of clinical infection. CONCLUSIONS: Bronchoscopic evaluations should include bacterial cultures for direct targeted antibiotic therapy only in the symptomatic patients.

Increased hypoxemia in patients with COPD and pulmonary hypertension undergoing bronchoscopy with biopsy.

BACKGROUND AND OBJECTIVE: Patients with pulmonary hypertension (PH) are considered to be at risk for complications associated with flexible bronchoscopy (FB), but data concerning the degree of PH are often lacking. We investigated whether COPD patients with PH who undergo bronchoscopy are at greater risk for complications. METHODS: This prospective study included 207 consecutive COPD patients undergoing FB. All underwent an echo-Doppler to evaluate pulmonary artery pressure on the day of the bronchoscopy procedure. Pulmonologists were blinded to the echocardiogram results. RESULTS: A total of 167 patients (80.7%) had normal pulmonary pressure. The remaining 40 patients (19.3%) had PH: 27 (13.0%) mild, eight (3.9%) moderate, and five (2.4%) severe. Noninvasive hemodynamic parameters between groups before and after FB were similar. Two patients with normal pulmonary pressure developed supraventricular tachycardia. None developed hemodynamically significant dysrhythmia. Bleeding episodes between groups in bronchoalveolar lavage (BAL) and transbronchial biopsy (TBB) did not differ. PH patients who underwent BAL and TBB had decreased O2 saturation during the procedure compared with the non-PH group (23.5% vs 6.9%, P=0.033). No deaths were attributable to FB. CONCLUSION: PH is common among COPD patients undergoing FB. PH patients undergoing BAL and TBB are at higher risk of decreased O2 saturation than those without PH. Further studies should assess the risk among COPD patients with moderate-to-severe PH.

First experience with the home-care management system for respiratory patients in Israel.

BACKGROUND: Ventilator-dependent patients represent an increasing clinical logistic and economic burden. An alternative solution might be monitored home care with high-tech ventilatory support systems. OBJECTIVES: To explore the implications of such home care management, such as its impact on quality of life and its cost-effectiveness, and to assess the practical feasibility of this mode of home care in Israel. METHODS: We surveyed 25 partly or fully home-ventilated patients (17 males and 8 females), average age 37.6 years (range 1-72), who were treated through a home care provider during a 2 year period. RESULTS: Most patients (n = 18) had a neuromuscular respiratory disorder. The average hospital stay of these patients prior to entry into the home care program was 181.2 days/per patient. The average home care duration was 404.9 days/per patient (range 60-971) with a low hospitalization rate of 3.3 +/- 6.5 days/per patient. The monthly expenditure for home care of these patients was one-third that of the hospital stay cost ($3.546.9 vs. $11.000, per patient respectively). The patients reported better quality of life in the home care environment, as assessed by the Sickness impact Profile questionnaire. CONCLUSIONS: Home ventilation of patients in Israel by home care providers is a practical and attractive treatment modality in terms of economic benefits and quality of life.

Pleural ELFA D-dimer assay: a surrogate marker for malignant pleural effusion.

BACKGROUND: Malignant pleural effusion is associated with enhanced fibrinolysis. However, no data are available concerning the precise role of pleural D-dimer assay in pleural effusion. We therefore assessed the role of pleural D-dimer assay in predicting malignant pleural effusion. PATIENTS AND METHODS: A prospective laboratory investigation was conducted in a tertiary care teaching hospital. The study included consecutive patients with pleural effusion who presented at the Pulmonary Department between November 2009 and May 2010. Blood and pleural D-dimer levels were measured by Enzyme Linked Fluorescent assay (ELFA). The results were correlated with the clinical, laboratory, and radiological findings, and with the final diagnosis of the pleural fluid. RESULTS: A total of 103 patients with pleural effusion were included in the study. The Pleural ELFA D-dimer results were found to be positively correlated with pleural etiology of malignancy (p=0.0001). Pleural etiology was also correlated with pleural LDH, pleural protein, pleural PH, pleural glucose, pleural and blood CRP, but not with ADA. In a binary logistic regression, only the pleural ELFA D-dimer assay was a significant predictor of the malignant pleural effusion (odds ratio 1.007; 95% confidence interval 1.002-1.012; p=0.007). The area under the receiver operating characteristics curve for malignancy was 0.79. A D-dimer level of 146mg/ml had a sensitivity of 82% and a specificity of 74%. CONCLUSIONS: We found high D-dimer levels among malignant pleural effusion. D-dimer might be useful as a simple, noninvasive, surrogate marker for malignant pleural effusion.

The significance of elevated tumor markers among patients with idiopathic pulmonary fibrosis before and after lung transplantation.

BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a progressive disease with a 3-year median survival. Lung volume and diffusion capacity at rest are usually used to monitor the clinical course. Because of high mortality, identification of patients at high risk is crucial for treatment strategies such as lung transplantation (LTX). This study was designed to determine if tumor markers could accurately characterize disease severity and survival in patients with IPF. METHODS: The study population consisted of 61 patients with progressive IPF referred for LTX. Pulmonary function tests, cardiopulmonary exercise test, 6-min walk distance test, and Doppler echocardiogram were assessed at baseline and compared with tumor marker levels. Participants were prospectively followed for at least 25 months to determine the relationship between test parameters and survival. Tumor marker levels were reassessed in patients who underwent LTX. Forty-one age- and sex-matched patients (21 LTX recipients) with COPD served as control subjects. RESULTS: In the IPF group, nine patients (14.7%) died during follow-up and 20 (32.8%) underwent LTX. Univariate analysis showed correlations between carbohydrate antigen (CA) 125 and FEV(1) % (P = .0001). CA 19-9 yielded the best correlations with exercise parameters and PAP. Significant correlation with survival was noted with CA 15-3 (P = .04) only. All tumor marker levels decreased significantly following LTX, except CA 125. CA 15-3 had the largest decrease (P = .001). Among the COPD group, tumor marker levels before LTX were significantly lower compared with the IPF and did not decrease following LTX. No patient in either group developed malignancy. CONCLUSIONS: CA 15-3 levels may predict disease severity in IPF. Levels decreased in patients with IPF but not with COPD following LTX and were not associated with malignancy. This preliminary observation suggests that mucin has a role in the pathogenesis of IPF and possibly is a marker for disease activity.

Artificial stone silicosis [corrected]: disease resurgence among artificial stone workers.

BACKGROUND: Silicosis is a progressive, fibrotic, occupational lung disease resulting from inhalation of respirable crystalline silica. This disease is preventable through appropriate workplace practices. We systematically assessed an outbreak of silicosis among patients referred to our center for lung transplant. METHODS: This retrospective cohort analysis included all patients with a diagnosis of silicosis who were referred for evaluation to the National Lung Transplantation Program in Israel from January 1997 through December 2010. We also compared the incidence of lung transplantation (LTX) due to silicosis in Israel with that of the International Society for Heart and Lung Transplantation (ISHLT) registry. RESULTS: During the 14-year study period, 25 patients with silicosis were referred for evaluation, including 10 patients who went on to undergo LTX. All patients were exposed by dry cutting a relatively new, artificial, decorative stone product with high crystalline silica content used primarily for kitchen countertops and bathroom fixtures. The patients had moderate-to-severe restrictive lung disease. Two patients developed progressive massive fibrosis; none manifested acute silicosis (silicoproteinosis). Three patients died during follow-up, without LTX. Based on the ISHLT registry incidence, 0.68 silicosis cases would have been expected instead of the 10 observed (incidence ratio, 14.6; 95% CI, 7.02-26.8). CONCLUSIONS: This silicosis outbreak is important because of the worldwide use of this and similar high-silica-content, artificial stone products. Further cases are likely to occur unless effective preventive measures are undertaken and existing safety practices are enforced.

Computerized analysis of cytology and fluorescence in situ hybridization (FISH) in induced sputum for lung cancer detection.

BACKGROUND: Lung cancer results from a multistep process, whereby genetic and epigenetic alterations lead to a malignant phenotype. Somatic mutations, deletions, and amplifications can be detected in the tumor itself, but they can also be found in histologically normal bronchial epithelium as a result of field cancerization. The present feasibility study describes a computer-assisted analysis of induced sputum employing morphology and fluorescence in situ hybridization (target-FISH), using 2 biomarkers located at chromosomes 3p22.1 and 10q22.3. METHODS: Induced sputum samples were collected using a standardized protocol from 12 patients with lung cancer and from 15 healthy, nonsmoking controls. We used an automated scanning system that allows consecutive scans of morphology and FISH of the same slide. Cells derived for the lower airways were analyzed for the presence of genetic alterations in the 3p22.1 and 10q22.3 loci. RESULTS: The cutoff for a positive diagnosis was defined as >4% of cells showing genetic alterations. Eleven of 12 lung cancer patients and 12 of 15 controls were identified correctly, giving an overall sensitivity and specificity of 91.66% and 80%, respectively. CONCLUSIONS: This study describes a new technology for detecting lung cancer noninvasively in induced sputum via a combination of morphology and FISH analysis (target-FISH) using computer-assisted technology. This approach may potentially be utilized for mass screening of high-risk populations.

Pulmonary fibrosis in a patient with exposure to glass wool fibers.

Glass wool or vitreous fibers are non-crystalline, fibrous inorganic substances (silicates) made primarily from rock, slag, glass, or other processed minerals. They belong to the man-made mineral fibers (MMMFs) group and their respiratory effects are well described by De Vuyst et al. [1995]. The authors pointed out the absence of firm evidence that exposure to these fibers is associated with lung fibrosis, pleural lesions, or non-specific respiratory disease in humans. Because of this observation, we find it of importance to present a case of interstitial fibrosis, which implies a direct association between long-term exposure to glass wool and the clinical outcome.

Model-based prediction of expiratory resistance index in patients with asthma.

OBJECTIVES: Develop a sensitive algorithm and index for detection of asthma patients using forced expiratory flow curves. METHODS: A lumped-parameter model of forced expiration was developed. The model can predict the flow-volume curve during forced expiratory maneuver. The flow-volume curves generated by the model depend on values of resistance parameters (FER). Use of flow-volume curves recorded from normal subjects and from patients with asthma before and after ventolin inhalation as inputs for the inverse model, yielded the resistance parameters for each case. These parameters are based on the entire information presented in the flow-volume curve and on the reduction in flow at all lung volumes. RESULTS: Forced Expiratory Resistance (FER(N)) indices were estimated at different percent of lung volumes using the inverse model. The index was significantly affected by inhalation of ventolin in asthmatic patients and was insensitive to ventolin inhalation in normal patients. In asthmatic patients, the FER index at five lung volumes (out of eight), was two--five times greater than in normal subjects with p < 0.05 (three of them with p < 0.01). CONCLUSIONS: The estimated parameters were sensitive indicators of the degree of lung function impairment and were able to accurately distinguish between healthy and asthmatic patients.