David Warriner

The use of non-routine pleural fluid analysis in the diagnosis of pleural effusion.

The investigation of a pleural effusion is, in general, a very straight forward process with the combination of clinical history, examination, radiology and pleural fluid analysis leading to diagnosis in most cases. While most fluid samples are sent for routine analysis including protein, LDH, glucose, cytology and microbiology, there are a number of more unusual fluid analyses available which in some cases directly lead to, and in others are suggestive of the diagnosis. Moreover, other fluid markers are constantly being evaluated as a diagnostic tool. In this review, we describe these non-routine pleural fluid analyses in detail. English language publications in MEDLINE and references from relevant articles from January 1 1990 to August 1 2009 were reviewed. Keywords searched in combination were pleural fluid, effusion, analysis, transudate, exudate and diagnosis.

Implantación de prótesis metálicas autoexpansibles con broncoscopia flexible bajo sedación para estenosis traqueobronquiales malignas:: análisis retrospectivo de un solo centro

OBJECTIVE To describe a 10-year experience of inserting Ultraflex™ self-expanding metal stents (SEMS) under sedation using flexible bronchoscopy for the treatment of malignant tracheobronchial stenosis in a tertiary referral centre. METHODS Medical notes were retrospectively reviewed for all patients who underwent SEMS insertion between 1999 and 2009. RESULTS A data analysis of 68 patients who had Ultraflex™ SEMS inserted under sedation was completed. Thirty three males and 35 females with a mean age of 67.9 years (range 35-94) presented with features including dyspnea/respiratory distress (39 patients), stridor (16 patients) and hemoptysis/dyspnea (13 patients). Etiology of stenosis included lung cancer (46 patients) esophageal cancer (14 patients) and other malignancies (8 patients). Mean dose of midazolam administered was 5mg (range 0-10mg). The trachea was the most common site of stent insertion followed by the right and left main bronchus, respectively. Adjuvant laser therapy was applied at some stage in 31% of all cases, and chemotherapy and/or radiotherapy was administered to at least 64% of patients with malignant disease. Hemoptysis and stent migration were the most frequent complications (5 and 4 patients, respectively). The mean survival time of stented non-small cell lung cancer (NSCLC) patients was 214 days (range 5-1233) and that of esophageal malignancy was 70 days (range 12-249). Mean pack-year history of individuals with lung cancer requiring stent insertion was 37 (range 2-100). CONCLUSION Ultraflex stents offer a safe and effective therapy for patients who are inoperable or unresectable that otherwise would have no alternative therapy. It has an immediate beneficial effect upon patients, not only through symptom relief but, in some, through prolongation of life. Survival data is no worse than other studies using different varieties of stents and insertion techniques indicating its longer-term efficacy. Moreover, this report highlights the feasibility of performing this procedure successfully in a respiratory unit, without the need for general anesthesia.

Pleural fluid characteristics of tuberculous pleural effusions.

Mycobacterium tuberculosis (TB) infection of the pleural space is an important cause of pleural effusion in areas of high TB prevalence. Microbiological analyses of pleural fluid in the acute setting may be negative. Consequently, investigations may proceed to more invasive techniques, such as pleural biopsy or thoracoscopy. Ongoing research has led to implementing a number of additional fluid analyses that may lead to a diagnosis without a need for further invasive procedures. In this review, we discuss the characteristics of tuberculous pleural fluid that may assist in this important diagnosis, and we highlight the benefits of specific biomarker analyses. English-language publications from a MEDLINE search and references from relevant articles from January 1, 1990 to September 1, 2009 were reviewed. The key words searched included tuberculosis, pleural fluid, effusion, diagnosis, adenosine deaminase, and interferon.

End-stage heart failure non-pharmacological therapy: recent advances in pacemakers, pressure monitors, pumps and other devices

Heart failure is a common, expensive and fatal condition and yet, until recently, there was a paucity of treatment options for patients with end-stage heart failure (ESHF), other than pharmacotherapy or heart transplant. Recent advances mean there is now an array of non-pharmacological therapies available for such patients; two such examples are cardiac resynchronisation therapy (CRT) and implantable cardioverter defibrillators (ICDs), which improve pump function, symptoms, exercise capacity or reduce the risk of arrhythmic death, respectively. Furthermore, prior to transplant or if they are deemed unsuitable, patients now have the option of a left ventricular assist device (LVAD) or total artificial heart (TAH), where available, before heart transplant needs to be considered. The concept of remote monitoring is increasingly popular, and while recording parameters such as blood pressure and weight are not new, what is new is how implantable remote monitoring devices are now able to detect clinical decompensation before even the patient is symptomatic and relay this information onto the clinician. Other more novel therapies for ESHF include nerve stimulators to reduce sympathetic tone, the risk of arrhythmia and augment reverse cardiac remodelling and, perhaps the most novel of all, cardiac contractility modulation, stimulating the heart paradoxically during the absolute refractory period that serves to improve cardiac contractility.

An alternative view of self-discharge against medical advice : an opportunity to demonstrate empathy, empowerment, and care

In this article, we present the experiences of discharging against medical advice from the perspectives of 17 hospital and community-based health care practitioners, and 16 patients, and relatives from a range of medical and surgical wards. Semistructured, in-depth interviews were conducted and thematically analyzed. We identified that practitioners, patients, and relatives frequently expressed empathy for each other during the interviews, and discharge against medical advice was presented as a way for patients to have control over their health. Contrary to predominantly negative framings that highlight increased mortality and morbidity, and portray people who discharge against medical advice as poor decision makers, we conclude discharge against medical advice can be framed positively. It can be an opportunity to empathize, empower, and care. We recommend that the vocabulary used in hospital discharge against medical advice policies and documents should be updated to reflect a culture of medicine that values patient autonomy, patient centeredness, and shared decision making.

Is stent insertion via flexible bronchoscopy a feasible alternative to surgery in inoperable thyroid related tracheobronchial stenosis

The use of endobronchial stents in the treatment of tumour related tracheobronchial stenosis has been well described. While many forms of stent exist, their use has invariably been described in the context of rigid bronchoscopy and general anaesthesia. Few reports exist on the use of endobronchial stents for the treatment of thyroid goitre related stenosis.Our objective was to retrospectively analyse the use of self expanding metal stent (SEMS) insertion for thyroid related tracheobronchial stenosis under sedation with flexible bronchoscopy in the treatment of this condition. Patient charts were reviewed on all patients who had stent insertion in our unit since 1999-2005. We analysed the indication for stenting, pathology, stent size and location and detail any complications of therapy. Particular attention was paid to those with benign disease to evaluate the recommendation made by the U.S Food and Drug Administration (FDA) in 2005 on the use of metal stents in benign airways disease. A total of five patients (4 female, 1 male) who were too unfit for surgery had stent insertion for thyroid related tracheobronchial stenosis over this period. All patients experienced complications which became prolonged and recurrent in those with benign disease who survived longer. We conclude that SEMS insertion via flexible bronchoscopy is not appropriate for the treatment of benign thyroid goitre related tracheobronchial stenosis until all other interventions have been exhaustively explored.

Is There a Beneficial Role for a Flexible Bronchoscopic Approach to Oesophageal Tumour-related Tracheobronchial Stenosis?

BackgroundInterventional pulmonology, in particular, tracheobronchial stent insertion, has been well described in the treatment of tracheobronchial malignant disease. Its benefits are particularly obvious in patients with inoperable malignancy or in those unfit for surgery and have been extensively described. Fewer data exist on the benefits of using self-expanding metal stents (SEMS) inserted via flexible bronchoscopy in the treatment of tracheobronchial stenosis due to extrinsic compression or infiltration from primary oesophageal malignancy.MethodsWe retrospectively reviewed all patients who had stent insertion via flexible bronchoscopy from 2002 to 2010 at our institution.ResultsWe found 14 patients who had Ultraflex™ self-expanding metal stent insertion for this condition. We analysed this group of patients with respect to their presentation; indications for stent insertion over surgery; size, location, and number of stents inserted; sedative dose; complications of therapy; and survival time.ConclusionWe conclude that insertion of SEMS via flexible bronchoscopy is a safe and effective therapy for those individuals who require palliation or are too unfit for the general anaesthesia required for surgery. Moreover, this form of stent insertion may be performed by respiratory physicians in the bronchoscopy suite, rather than by their cardiothoracic counterparts in theatre.