Category: S

The angle formed by the base of the sacrum and the fifth lumbar vertebra.  

The angle formed by articulation of the last lumbar vertebra and the sacrum.  

Skin lesion in which numerous telangiectatic vessels radiate from a central point; commonly associated with fiver disease, hypertension, or pregnancy.  

A skin disorder marked by the appearance of small red vascular dots arranged in rings; due to proliferation of capillaries.  

Angiography in which a catheter is introduced directly into the vessel to be visualized.  

Unrecognized angina pectoris (i.e., coronary insufficiency that presents with symptoms other than chest pain or pressure). The patient may experience dyspnea on exertion, heartburn, nausea, arm pain, or other atypical symptoms. Silent angina pectoris occurs most often in older adults, in women, in postoperative patients who are heavily medicated, or in patients with diabetic neuropathy.…

Depth of anesthesia at which relaxation of muscles and loss of sensation and consciousness are adequate for the performance of surgery.  

The distinct series of steps through which anesthesia progresses. The first stage of pharmacologically induced general anesthesia includes preliminary excitement until voluntary control is lost. Because hearing is the last sense to be lost, the conversation of operating room staff should be guarded during this stage. The second stage consists of loss of voluntary control.…

Anesthesia produced by injection of an anesthetic into the splanchnic ganglion.  

Anesthesia due to a pathological or surgically induced lesion of a nerve root.