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Radial Nerve Palsy

  The radial nerve is composed of C5-8, and its injury leads to extensor elbow, wrist, and finger impairments, as well as sensory disturbances in the area between the thumb and the first and second metacarpal bones on the back of the hand. The typical manifestation of radial nerve palsy is wrist drop, as the radial nerve is the most easily damaged among the nerves of the brachial plexus.

Contents

1. What are the causes of radial nerve palsy
2. What complications can radial nerve palsy easily lead to
3. What are the typical symptoms of radial nerve palsy
4. How to prevent radial nerve palsy
5. What kind of laboratory tests need to be done for radial nerve palsy
6. Dietary taboos for patients with radial nerve palsy
7. Conventional methods of Western medicine for the treatment of radial nerve palsy

1. What are the causes of radial nerve palsy

  The radial nerve in the axilla can become paralyzed due to support pressure from a crutch, the upper segment of the radial nerve is close to the radial groove on the dorsal aspect of the middle third of the humerus, running from the medial side of the upper arm to the lateral side, and is easily damaged when the humerus is fractured, or the bone callus forms after the fracture and compresses the damaged area; using the arm as a pillow during sleep, keeping the upper arm in an abducted position for a long time during surgery, improper placement of a tourniquet on the upper limb, etc., can all lead to injury; lead poisoning and alcoholism can also selectively damage the radial nerve.

2. What complications can radial nerve palsy easily lead to

  When the radial nerve is damaged, there may be a decrease in sensation on the dorsal aspect of the forearm and the radial side of the handback, often due to the overlapping of adjacent sensory nerves, and the area of sensory defect is limited to a very small part on the back of the thumb and the first and second metacarpal bones.

3. What are the typical symptoms of radial nerve palsy

  Radial nerve palsy has clinical manifestations of both motor and sensory impairments:

  1. Motor disturbances

  The typical symptom is wrist drop. High-level injuries (above the axillary branch of the triceps brachii) lead to complete radial nerve palsy, with complete paralysis of all extensor muscles of the upper limb, unable to extend the elbow, wrist, and metacarpophalangeal joints. When the forearm is extended, it cannot supinate. The hand is in a supinated position. Paralysis of the brachioradialis muscle makes it impossible to flex the elbow joint in a semi-supinated position. If the middle third of the humerus (below the branch of the triceps brachii) is damaged, the function of the triceps brachii is intact, and the lower end of the humerus or the upper third of the forearm is damaged, the function of the brachioradialis muscle, supinator muscle, and extensor carpi radialis muscle is preserved. If the lower third of the forearm is damaged, only finger extension is paralyzed, without wrist drop, close to wrist joint injury (all motor branches have been emitted), without symptoms of radial nerve palsy.

  2. Sensory disturbances

  Only the palm-back area between the thumb and the first and second metacarpal bones has sensory disturbances.

4. How to prevent radial nerve palsy

  To prevent radial nerve palsy, it is important to understand the following three points:
  1. Engage in moderate exercise and avoid prolonged nerve compression.

  2. During the acute phase, patients should have adequate rest and avoid excessive activity.

  3. Good regeneration ability of the radial nerve, treatment can recover, prognosis is good.

5. What laboratory tests are needed for radial nerve palsy

  After radial nerve palsy, the nature of nerve injury is clearly identified through electromyography and according to the findings of nerve muscle electromyography:

  1. Complete injury:There is spontaneous activity, no MUP, CMA, PSNA, PMNCV all disappear.

  2. Severe injury:There is spontaneous activity, no MUP, CMAP amplitude decreases, SNAP decreases or disappears, MNCV slows down or disappears.

  3. Incomplete injury:There may be spontaneous activity or prolonged insertion potential, reduced MUP, decreased CMAP, decreased NAP, normal or slowed MNCV.

  Hospitals with conditions can use electromyography as a routine examination for nerve injury, and can perform electromyography tracking and monitoring during the recovery process of nerve injury to observe the regeneration of nerves and provide surgical indications.

6. Dietary taboos for radial nerve palsy patients

  After radial nerve palsy, it is recommended to consume a diet rich in nutrition and various vitamins, take B vitamins, and avoid excessive activity. Here are two food therapy recipes for reference.

  1. Chuanxiong and Baizhi water-braised fish head:

  Three to nine grams of Chuanxiong, three to nine grams of Baizhi, 500 grams of bighead carp, scallion, pepper, ginger, and salt in appropriate amounts. Boil with strong fire, then simmer for half an hour with gentle fire, and eat the fish and drink the soup in the morning and evening. It can dispel wind and cold, activate blood circulation, and unblock meridians.

  2. Ginseng and Chinese wolfberry paste soup:

  Two grams each of American ginseng, Chinese wolfberry, and dried grapes, two grams each of lotus seed and yam, twelve grams each of mutton lotus and hemp seed, three grams of tangerine peel, two dates and two walnuts, decoct the medicine into a decoction and take it orally 2-3 times. It has the effect of tonifying the middle-jiao and vital energy.

7. Conventional Methods for Treating Radial Nerve Palsy in Western Medicine

  The treatment measures for radial nerve palsy are divided into the following two aspects:

  Firstly, General Treatment

  1. During the acute stage, patients should have adequate rest and avoid excessive activity.

  2. Provide a diet rich in nutrition and various vitamins.

  Secondly, Drug Treatment

  1. Administer medications such as B vitamins and 654-2.

  2. Administer adrenal cortical hormones.

  3. Apply analgesics when necessary.

Recommend: Distal Radius Fracture , Brachial Plexus Neuralgia in Newborns , Shoulder Joint Injury , Elbow joint dislocation , Shoulder joint dislocation , Posterior interosseous syndrome

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