Roughly 15 million red blood cell (RBC) units are transfused annually in the U.S., but transfusion practices vary substantially, partly because of limited high-quality evidence regarding risks and benefits of RBC transfusions. To develop a clinical practice guideline on transfusion practices for hemodynamically stable adults …

Guideline

Clinical Practice

Red Cell

10.1056/hm201205140000001

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Should We Curb the Curbside Consult

Journal watch (2013)

Aaron J. Calderon FACP. FACP.

Curbside consultations are widespread in medicine, but how they relate to patient care is largely unknown. Researchers conducted a prospective

10.1056/hm201301160000002

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Can Monitoring Procalcitonin Limit Antibiotic Use in ICUs

Journal watch (2011)

Aaron J. Calderon FACP. FACP.

Antibiotics prescribed in intensive care units (ICUs) are associated with higher costs, multidrug-resistant pathogens, and superinfections with

Procalcitonin

10.1056/hm201109010000001

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Appropriate Use of Point-of-Care Ultrasonography in Patients with Acute Dyspnea in the Emergency Department or Hospital

Journal watch (2021)

Aaron J. Calderon FACP. FACP.Sfhm

Sponsoring Organization: American College of Physicians (ACP)BackgroundPoint-of-care ultrasound (POCUS) is rapidly becoming a bedside diagnostic

Acute care

Point of care

10.1056/nejm-jw.na53533

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Should Patients with Abnormal Coagulation Lab Results Be Transfused Before Thoracentesis

Journal watch (2013)

Aaron J. Calderon FACP. FACP.Sfhm

Patients with abnormal coagulation lab results often receive transfusions before undergoing thoracentesis, despite substantial observational evidence

Thoracentesis

Thrombelastography

10.1056/nejm-jw.na31397

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Which Inflammatory Marker Should We Measure? ESR, CRP, or Both?

Journal watch (2010)

Aaron J. Calderon FACP. FACP.

Erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) level are the most widely used tests to monitor and detect inflammatory disorders.

10.1056/hm201010250000001

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Clinicians Often Fail to Recognize Patients Who Lack Decision-Making Capacity

Journal watch (2011)

Aaron J. Calderon FACP. FACP.

Physicians often ask patients to make complex choices about diagnostic studies or treatments. Medical decision-making capacity includes a patient's ability to understand relevant information and appreciate the consequences of a decision. Physicians frequently lack formal training in assessing patients' capacity and regularly fail to identify patients who are incapable of making informed …

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Medical Decision Making

Clinical Decision Making

Decision aids

10.1056/hm201109120000001

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Connected components of strata of Abelian differentials over Teichm\"uller space.

arXiv (Cornell University) (2019)

Aaron J. Calderon

This paper describes connected components of the strata of holomorphic abelian differentials on marked Riemann surfaces with prescribed degrees of zeros. Unlike the case for unmarked Riemann surfaces, we find there can be many connected components, distinguished by roots of the cotangent bundle of the surface. In the course of our investigation we also characterize the images of the fundamental groups of strata inside of the mapping class group. The main techniques of proof are mod r winding numbers and a mapping class group-theoretic analogue of the Euclidean algorithm.

Mapping class group

Teichmüller space

Connected component

Covering space

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