Glenn Eiger

Patterns and Predictors of Early Hospital Readmission in Patients With Congestive Heart Failure

Little is known about factors related to rehospitalizations that occur soon after discharge in patients with congestive heart failure (CHF). The aim of this study was to determine if there are specific characteristics common to CHF patients readmitted within 30 days. Study methods included retrospective chart review. Patients included all those hospitalized and readmitted to a large community teaching hospital for CHF exacerbation within 30 days between January 7, 2005 and June 30, 2006. A total of 58 patients were responsible for 79 readmissions. Half of all patients readmitted for CHF exacerbation were incorrectly labeled, raising doubt about reliance on administrative data alone to determine overall quality performance. Forty-five percent of all readmitted patients had underlying chronic renal insufficiency/failure (CRI/CRF) compared with 26% of CHF patients who were not readmitted within 30 days. Therefore, specifically targeting CHF patients with CRI/CRF could lead to major improvement of early readmission rates. (Am J Med Qual 2008;23:18-23)

Long-term Remission of Refractory Stiff-Man Syndrome After Treatment With Intravenous Immunoglobulin

The stiff-man syndrome is a rare neuromuscular disorder characterized by progressive rigidity, stiffness, and intermittent spasm of axial and extremity muscles. Its etiology is unknown. Different therapeutic regimens have been used with variable success. We present a case of refractory stiff-man syndrome, in which the symptoms were successfully controlled by the administration of intravenous immunoglobulin (IVIg). This case gives evidence that IVIg can be a safe and an efficient treatment of refractory stiff-man syndrome. The exact indication for and the cost-effectiveness of IVIg in the treatment of this rare entity remain to be determined.

Determinants of skin contact pressure formation during non-invasive ventilation

There is no published data about mask features that impact skin contact pressure during mask ventilation. To investigate the physical factors of skin contact pressure formation. We measured masks with original and reduced air cushion size and recorded contact pressure. We determined cushion contact and mask areas by planimetric measurements. Contact pressures necessary to prevent air leakage during inspiration exceed inspiratory pressure by 1.01+/-0.41 hPa independent of cushion size. Contact area, ventilator pressure and mask area during inspiration and expiration impact contact pressure. Mask contact pressures are higher during expiration. The contact pressure increases with increase in inspiratory pressures independent of the ventilator cycle. During expiration, the contact pressure will increase in proportion to the expiratory pressure reduction of the ventilator. The mask with reduced air cushion size developed higher contact pressures. Contact pressure can be reduced by selecting masks with a small mask area in combination with a large mask cushion.

Warfarin-Induced Pulmonary Metastatic Calcification and Calciphylaxis in a Patient With End-stage Renal Disease

Patients with end-stage renal disease (ESRD) receiving hemodialysis (HD) suffer from a number of metabolic derangements. Ectopic deposition of calcium in the skin, soft tissues, blood vessels, and viscera is a potentially devastating consequence of disorders of calcium and phosphorus homeostasis. We report the case of a patient with ESRD and secondary hyperparathyroidism receiving HD who developed metastatic pulmonary calcification and calciphylaxis following initiation of warfarin therapy after mechanical valve replacement. Because not all patients with ESRD receiving HD develop ectopic calcification, there appears to be a complex cascade of metabolic interactions that predispose patients to this process. Warfarin is a vitamin K antagonist with inhibitory effects not only on proteins of the coagulation cascade, but also on other important protein systems. Its role in ectopic calcium deposition has been the subject of theories and has been reported in the literature, but no link with metastatic pulmonary calcification has been made. Patients receiving HD have an increased incidence of conditions that require chronic anticoagulation with warfarin, such as VTE, atrial fibrillation, and valvular heart disease requiring valve replacement surgery. Bioprosthetic valves should be considered in these patients because of the potential risk of metastatic calcification when warfarin is used in the setting of mechanical valve replacement.

Fatal alveolar hemorrhage and Abciximab (ReoProTM) therapy for acute myocardial infarction

We describe two cases of diffuse alveolar hemorrhage and development of ARDS in patients who underwent percutaneous transluminal coronary angioplasty (PTCA) with stenting in whom Abciximab (ReoPro) was used in combination with other agents interfering with the hemostatic mechanism. The development of pulmonary infiltrates, associated with a fall in hemoglobin after the administration of Abciximab, should strongly suggest the possibility of diffuse alveolar hemorrhage. Physicians should be aware of the possible association between the use of Abciximab and the development of alveolar hemorrhage.

CT pulmonary angiography utilization in the emergency department: diagnostic yield and adherence to current guidelines.

The aim is to investigate the patterns of computed tomography pulmonary angiography (CTPA) use and adherence to current guidelines. Medical records of patients investigated with CTPA for pulmonary embolism (PE) in a single academic hospital from January 2011 until December 2012 were reviewed. Wells scores were calculated retrospectively by researchers blinded to the results of the CTPA. “Avoidable imaging” was defined as imaging performed against current recommendations of the European Society of Cardiology or the PIOPED investigation group. A total of 646 patients underwent testing; 61 cases of PE were diagnosed (9.4%). Potentially avoidable imaging was performed in 49.5% and 71.5% of patients, depending on the criteria used; 11.5% of imaging studies were performed in low-risk patients with negative D-dimer assays. There is evidence of CTPA overuse and D-dimer underuse. Adherence to guidelines and appropriate use of D-dimer assay might reduce avoidable imaging and ionizing radiation exposure.

Incidental Findings on Computed Tomography Angiography in Patients Evaluated for Pulmonary Embolism

RATIONALE To investigate how often computed tomography (CT) pulmonary angiography contributes to establishing a diagnosis in patients presenting to the emergency department and how it performs compared to chest radiograph. OBJECTIVES The objective of this study was to measure the ability to identify a diagnosis and to investigate the prevalence and significance of incidental findings in patients evaluated with computed tomography pulmonary angiography in the emergency department. METHODS All adult patients evaluated with CT angiography over a 2-year period (January 1, 2011 to December 31, 2012) were included in the analysis. A total of 641 records were identified. Chest radiographs and CT angiography reports were reviewed to determine whether they could provide a diagnosis in patients without pulmonary embolism (PE). Studies negative for PE were stratified into three categories according to significance: type I prompted immediate action, type II required follow up, and type III had findings of limited significance. MEASUREMENTS AND MAIN RESULTS CT angiography identified a diagnosis in 22.46% of the patient population and in 14.31% of patients without PE. In patients who had CT angiography with chest radiograph, diagnoses were provided in 14.01 and 9.86% of patients, respectively. When analysis was isolated to patients with low probability for PE, CT angiography provided a diagnosis in 20% and chest radiography in 10.23% of patients. The majority of missed cases represented infiltrates too small to be detected by radiography and were believed to represent lung infections by the interpreting radiologist. Among studies negative for PE, 15% were type I, 17.07% were type II, 48.1% were type III, and the rest were normal. CONCLUSIONS CT angiography is superior to chest radiography at providing a diagnosis in patients investigated for PE, even when no PE is present. However, in patients at low risk for PE, the clinical benefit of the additional diagnoses is questionable.

Case Report: Duodenal Obstruction Caused by Strongyloides stercoralis Enteritis in an HTLV-1-Infected Host

Strongyloides stercoralis is a nematode that can inhabit the human inte stine. In uncomplicate d strongyloidiasis, many patients are asymptomatic (1). Strongyloides is able to replicate within the human host, resulting in ongoing cycle s of autoinfe ction. If numerous, invasive Strongyloides stercoralis larvae can cause substantial inte stinal disease or can disseminate wide ly to extrainte stinal sites such as lungs, kidney, or brain (the hyperinfection syndrome ), especially in the immunocompromised host (2, 3). We describe a man infected with the human T-cell lymphotropic virus type 1 (HTLV-1) who presented with the relative ly rare ® nding of duodenal obstruction secondary to Strongyloides stercoralis infection.

Respiratory muscle unloading during auto-adaptive non-invasive ventilation

RATIONALE Non-invasive ventilation (NIV) has been shown to improve clinical outcomes in acute and chronic hypercapnic respiratory failure. A new timed, automated, auto-adaptive non-invasive ventilatory mode (TA-mode) has been recently introduced. OBJECTIVE To investigate the degree of respiratory muscle unloading with this new mode in comparison to assisted (S-mode) NIV in healthy individuals. METHODS Work of breathing, pressure time product and transdiaphragmatic pressure time product were measured during unassisted breathing, assisted and TA-mode-NIV in eight healthy, awake volunteers at inspiratory pressures of 20 and expiratory pressures of 4hPa. RESULTS Assisted and TA-mode-NIV reduced the work of breathing by 50 and 89.1%, pressure time product by 61.5 and 72.6% and transdiaphragmatic pressure time product by 77 and 88.7%, respectively when compared to unassisted breathing. The degree of respiratory muscle unloading was higher during TA-mode-NIV when compared to assisted non-invasive ventilation (work of breathing p<0.001, pressure time product p=0.04 and transdiaphragmatic pressure time product p=0,01). CONCLUSION TA-mode-NIV achieved significant higher levels of respiratory muscle unloading in healthy individuals when compared to assisted non-invasive ventilation.

Schwannoma of posterior mediastinum: A case report and concise review****

In the vast majority of cases, schwannoma (neurilemmoma) of the posterior mediastinum arises from 1 of the intercostal nerves and most often is manifested by an asymptomatic solitary mass on a radiograph. This case report emphasizes the importance of new imaging studies in the diagnosis of this classic tumor of the mediastinum, with special regard to the differential diagnosis of such a tumor.