Faculty Bibliography

INTRODUCTION Bacteremia as a direct result of bronchoscopy is a relatively uncommon event. We report a case of an empyema and streptococcus pneumoniae bacteremia following bronchoscopy. CASE PRESENTATION A 62 year female with a distant history of extrapulmonary sarcoidosis and new autoimmune serologies suggestive of Sjogren's presents with one month history of shortness of breath and cough. A CT chest revealed patchy bilateral opacities in the lung, as well as significant lymphadenopathy. The patient underwent a bronchoscopy with bronchoalveolar lavage and transbronchial biopsy of the right lower lobe. She also underwent a transbronchial needle aspiration of the subcarinal lymph node. The patient was discharged home on the same day without significant findings on her post-bronchoscopy chest x-ray. The bronchoscopy was diagnostic for non-caseating granulomas. Two days after the procedure, the patient developed fever, shortness of breath and chest pain. CT chest revealed a loculated right pleural effusion and a new right lower lobe infiltrate. A thoracentesis was performed which revealed a pH of less than 6.8. Cultures from the pleural fluid were consistent with streptococcus. Blood cultures were positive for streptococcus pneumoniae. The patient underwent a VATS, decortication and right lower lobe wedge resection. Pathology from the wedge resection was consistent with non-necrotizing granulomatous inflammation of the lung and empyema. The patient improved after surgery and antibiotics. Upper and lower respiratory tract cultures from sputum and bronchoscopy were all negative. DISCUSSION Yigla et al report a bacteremia rate as high as 6.5% following fiberoptic bronchoscopy. Bacteremia following bronchoscopy, however, remains the exception rather than the norm. Witte et al looked at 47 patients following transbronchial needle aspiration, and 22 patients following transbronchial biopsies. Blood cultures were drawn within 24 hours post procedure, and in no patients were blood cultures found to be positive. In 1977, Beyt et al reported a case of fatal pneumonitis and septicemia following fiberoptic bronchoscopy and endobronchial biopsy. Few cases such as this highlight the rare yet serious complication of septicemia following bronchoscopy. In our patient, it is possible that the empyema and bacteremia may have resulted from bacteriologic inoculation after contamination of the bronchoscope during insertion; however, bronchoscopically obtained cultures do not confirm this theory. Although bacteremia following bronchoscopy remains a rare event, clinicians should be aware of this potentially serious complication. CONCLUSION Although rare, bacteremia as a direct result of bronchoscopy can occur. Clinicians should be aware of this potentially serious complication

BACKGROUND AND OBJECTIVE: Patients with idiopathic pulmonary fibrosis (IPF) have a higher prevalence of coronary artery disease and this could have an impact on their outcomes. We investigated the predictive ability of coronary artery calcification, assessed by routine CT, which may predict the presence of coronary artery disease. METHODS: The study cohort consisted of patients with IPF and with left heart catheterization data plus CT scans from July 2003 to July 2008. Grades of coronary calcification on CT were compared with left heart catheterization determination of coronary artery disease. RESULTS: There were 57 patients in whom left heart catheterization review demonstrated significant coronary artery disease in 28.1% (16/57), mild disease in 40.3% (23/57) and none in 31.6% (18/57). The median time interval between the catheterization and the reviewed CT scan was 39 days. The sensitivity of moderate to severe calcification for significant coronary artery disease was 81%, while the specificity was 85%, with an associated odds ratio of 25.2 (4.64-166, P < 0.005). There was excellent agreement among three radiologists in the grading of coronary calcification. CONCLUSIONS: Coronary calcification, as assessed by routine CT of the chest, has very good performance characteristics in predicting underlying significant coronary artery disease in patients with IPF. The routine availability of this study enables the ready screening for coronary artery disease in IPF patients.

INTRODUCTION: Acute exacerbation of IPF is increasingly being recognized as a common clinical event in the IPF population. The exact etiology remains unknown. Previous reports have shown an association between lung surgery, bronchoalveolar lavage, and surgical lung biopsies as a potential trigger for exacerbations of IPF. To our knowledge, there are no known cases in the literature reporting an exacerbation of IPF following a non-thoracic surgical procedure. We report a case of acute exacerbation of IPF following orthopedic surgery. CASE PRESENTATION: 78 year old male with a history of COPD (thirty pack year smoking history) and severe osteoarthritis was admitted to the NYU Hospital for Joint Diseases to undergo evaluation for total hip arthroplasty. Pre-operative evaluation was significant for a restrictive pattern with low DLCO on pulmonary function testing, as well increased interstitial markings on chest x-ray concerning for a fibrotic process. The patient reported no pulmonary symptoms, and underwent successful total hip arthroplasty without complication. On Post op day #6, the patient developed dyspnea on exertion and at rest, requiring increasing amounts of oxygen supplementation. A Chest CT was negative for pulmonary embolism, however did show bronchiectasis and evidence of fibrosis. An echocardiogram did not show evidence of heart failure. The patient was started on broad spectrum antibiotics with Vancomycin, Zosyn and Azithromycin. He also was started on high dose IV steroids (Solumedrol 60mg IV every 6 hours) for a potential COPD exacerbation. Sputum culture was positive only for Candida glabrata, and the patient completed a course of Anidulafungin. However, the patient's respiratory status continued to deteriorate, eventually requiring noninvasive positive pressure ventilation. High dose steroids were continued, as well as therapeutic anticoagulation. A repeat CT chest showed increased groundglass opacities, worsening bronchiectasis and fibrosis diffusely in a UIP pattern. A repeat echocardiogram showed new evidence for pulmonary hypertension, however otherwise normal. A trial of diuretics was initiated without a response. The patient eventually required intubation and tracheostomy, and later passed away. An autopsy revealed evidence for diffuse alveolar damage on a background of honeycombing and bronchiectasis. DISCUSSION: The etiology and pathogenesis of IPF exacerbations remains unknown. One hypothesis involves the loss of alveolar cell integrity following injury, leading to extrusion of fibrin into the alveolar spaces and remodeling. Fibrocytes can be recruited in response to chemokines generated by infection and injury and may potentiate fibrogenesis, leading to diffuse alveolar damage. This process may be triggered by pulmonary procedures, as previously reported. However, a similar inflammatory response may occur after a non-thoracic procedure, leading to the fibrogenic process. The above patient suffered an unexplained worsening fibrotic process, as evidenced by imaging, respiratory failure, and autopsy findings. Alternative causes, such as left heart failure and pulmonary embolism, were excluded. Potential infections were treated with antibiotics. Commonly proposed diagnostic criteria for IPF exacerbation were met. This is the first case to our knowledge of a non-pulmonary procedure triggering the disease process. Cases such as this are likely more common than realized and remain underreported. Clinicians should be aware of the potential for exacerbation of IPF following non-thoracic surgical procedures. CONCLUSIONS: Acute exacerbation of IPF is increasingly being recognized as a common clinical event and may occur after non-thoracic procedures, such as orthopedic surgery

INTRODUCTION: Idiopathic Pulmonary Fibrosis (IPF) is a progressive disease with a poor prognosis for which there is no effective medical therapy. An awareness of comorbidities that are treatable and might impact outcomes in these patients is therefore very important. We sought to determine the prevalence of coronary artery disease (CAD) in IPF patients in comparison to a control group of patients with chronic obstructive pulmonary disease (COPD). We also sought to assess the impact of CAD on IPF patient outcomes. PATIENTS AND METHODS: IPF and COPD transplant candidates whose work-up included left heart catheterization were categorized as having significant CAD, non-significant CAD or no disease. The risk factor profile and prevalence of CAD in both groups was compared. RESULTS: There were 73 IPF and 56 COPD patients. The prevalence of CAD was 65.8% in the IPF group compared to 46.1% in the COPD patients (p<0.028). Significant disease was present in 28.8% of IPF patients vs.16.1% of the COPD patients (p<0.081). Unsuspected significant CAD was found in 18% of IPF patients versus 10.9% of COPD patients (p<0.004). Outcomes of IPF patients with significant CAD was worse than those with no or non-significant disease (p<0.003) with a median survival of 572 days from the time of left heart catheterization. CONCLUSION: There is a higher prevalence of CAD in IPF patients compared to a similarly matched COPD group. This increased association appeared to be independent of common coronary artery risk factors. IPF patients with significant CAD appear to have worse outcomes.