As defined in the medical literature, pneumonia is the inflammation of the lung parenchyma (tissue) in which the air sacs (alveoli) fill with pus and may become solid typically due to an infection.

There are numerous ways to evaluate a patient’s oxygen. Pulse oximetry or saturation (SpO2) is one of them.

When CT is used, a circular region of interest is drawn around a portion of one of five lumbar vertebrae.

It is well-established that bone mineral loss is a normal physiologic process.

Roux-en-Y gastric bypass surgery is the second most common weight loss operation performed in the United States.

In a person with normal intestinal anatomy, blood alcohol content (BAC) and alcohol metabolism are a function of three things.

A brain contusion on the same side of the head as the surface impact site (abrasions and lacerations) is referred to as a coup contusion. 

The DSM-5 includes three different anxiety disorders: in children, they typically cluster, making it difficult to separate one from another.

The DSM-5 has specific criteria for Post-Traumatic Stress Disorder for children six years and younger.

The small intestine absorbs nutrients and some water from digested food. The vast majority of food absorption happens in the small intestine.

Anxiety and depressive disorders are among the most common psychiatric illnesses; they are highly comorbid with each other, tending to occur at the same time for individual patients.

Approximately 17.3 million Americans (7.1% of the population) are diagnosed with depression.

Obesity as a medical diagnosis is defined in relation to body mass index (BMI). BMI is a relationship between a person’s height and weight.

GERD is one of the most common conditions diagnosed in the United States.

Handoff is the transfer and acceptance of patient care achieved through effective communication.

The Emergency Severity Index (ESI) is a five-level emergency department triage algorithm that provides a clinical stratification of patients…

Ribs and clavicles are necessary as part of the framework for normal breathing.

The skin is composed of multiple layers of cells. A burn injury to the skin affects the surface first and, as the burn gets more severe, it penetrates deeper into the layers of the skin. 

Shortness of breath when laying down is a common heart failure symptom that results from increased lung congestion of the lungs caused by the shift of fluids from the legs to the torso.