Search results
Results From The WOW.Com Content Network
Sciatic nerve entrapment syndrome: The sciatic nerve becomes entrapped by muscles or other structures. [20] Vascular claudication (secondary to atherosclerosis): The obstruction of arterial flow leads to muscular ischemia and causes pain in the buttock and calf. More common in the elderly with cardiovascular risk factors.
Ischemia is a vascular disease involving an interruption in the arterial blood supply to a tissue, organ, or extremity that, if untreated, can lead to tissue death. It can be caused by embolism, thrombosis of an atherosclerotic artery, or trauma. Venous problems like venous outflow obstruction and low-flow states can cause acute arterial ischemia.
This worsening cycle can eventually lead to a lack of sufficient oxygen in the soft tissues (tissue ischemia) and tissue death . Tingling and abnormal sensation (paresthesia) can begin as early as 30 minutes from the start of tissue ischemia and permanent damage can occur as early as 12 hours from the onset of the inciting injury. [19]
Acute limb ischemia may also be caused by traumatic disruption of blood flow to a limb, which may present with either hard signs or soft signs of vascular injury. [15] Hard signs include pulsatile bleeding, expanding hematomas (collections of blood), or absent distal pulses, and must be taken to surgery emergently.
A surgical nerve decompression can relieve pressure on the nerve but cannot always reverse the physiological changes that occurred before treatment. Nerve injury by a single episode of physical trauma is in one sense an acute compression neuropathy but is not usually included under this heading, as chronic compression takes a unique ...
The causes of brain ischemia vary from sickle cell anemia to congenital heart defects. Symptoms of brain ischemia can include unconsciousness, blindness, problems with coordination, and weakness in the body. Other effects that may result from brain ischemia are stroke, cardiorespiratory arrest, and irreversible brain damage.
The major tissues affected are nerves and muscles, where irreversible damage starts to occur after 4–6 hours of cessation of blood supply. [4] Skeletal muscle, the major tissue affected, is still relatively resistant to infarction compared to the heart and brain because its ability to rely on anaerobic metabolism by glycogen stored in the cells may supply the muscle tissue long enough for ...
Dysfunction of a single nerve such as the common peroneal nerve is called a mononeuropathy. Mononeuropathy means the nerve damage is occurred in one area. However, certain conditions may also cause single nerve injuries. [4] Common causes of damage to the peroneal nerve include the following: Traumatic injury on the knee; Fracture of the fibula