Carotid Duplex is an ultrasound test that evaluates blood flow and structure in the carotid arteries in the neck. It is commonly used to look for narrowing (stenosis) caused by plaque (atherosclerosis). It combines two ultrasound approaches to show both anatomy and flow. Clinicians use it in outpatient vascular labs, hospitals, and stroke evaluation settings.

Foot drop is a walking problem where the front of the foot has trouble lifting up. It often causes the toes to catch or drag during the swing phase of gait. Foot drop is a clinical sign, not a single diagnosis. It is commonly discussed in spine, nerve, and orthopedic settings because nerve pathways to the ankle are frequently involved.

Venous Doppler is an ultrasound-based test that evaluates blood flow in veins. It uses sound waves to show whether venous blood is moving normally, slowed, or blocked. It is commonly used to assess leg veins for clots and to evaluate chronic vein problems like reflux. It is also used in hospital and outpatient vascular and cardiovascular care.

Weakness is a reduced ability to generate normal muscle force. It is a common symptom and exam finding in spine, nerve, and muscle conditions. Clinicians use Weakness to help localize where a problem may be occurring in the nervous system or musculoskeletal system. Patients often describe it as “giving way,” “heaviness,” or difficulty lifting, gripping, or walking.

Duplex Ultrasound is a noninvasive imaging test that shows blood vessels and blood flow in real time. It combines a standard ultrasound picture of anatomy with Doppler measurements of moving blood. It is commonly used to evaluate arteries and veins in the neck, arms, legs, abdomen, and around surgical grafts or dialysis access. Clinicians use it to help explain symptoms, estimate disease severity, and guide next-step testing or treatment planning.

Tingling is an abnormal skin sensation often described as “pins and needles.” It is commonly grouped under the medical term *paresthesia*. People most often notice it in the arms, hands, legs, feet, or around the face. In spine care, Tingling is frequently discussed as a clue to nerve irritation or compression.

TBI most often means **toe-brachial index** in cardiovascular and vascular medicine. It is a **ratio** comparing blood pressure at the toe to blood pressure in the arm. It is commonly used to evaluate **circulation in the legs and feet**, especially when other tests are less reliable. In this clinical context, TBI is different from the non-cardiovascular acronym “traumatic brain injury.”

Numbness is a reduced or absent sense of feeling in part of the body. People often use the word to describe “dead” sensation, dullness, or decreased touch. Clinicians use Numbness as a symptom that can point to irritation or injury of nerves. It is commonly discussed in spine, neck, and back care because spinal nerves supply sensation to the arms, trunk, and legs.

Toe-Brachial Index is a noninvasive test that compares blood pressure in the toe to blood pressure in the arm. It is used to help assess blood flow to the lower limbs, especially when ankle readings are hard to interpret. Clinicians commonly use it when peripheral artery disease is suspected or being followed over time. It is often performed in vascular labs, cardiology practices, and wound or limb-preservation settings.

Paresthesia is an abnormal sensation such as tingling, pins-and-needles, buzzing, or “electric” feelings. It can occur with or without pain, and it may be temporary or persistent. The term is commonly used in spine, nerve, and musculoskeletal care to describe sensory symptoms. It helps clinicians communicate what a patient feels and where the nervous system may be irritated or injured.