What are the symptoms of a muscle needle piercing a nerve?

Intramuscular injection is a measure that achieves the effect of treating diseases by injecting drugs into human muscle tissue with a needle. It is what we commonly call an injection. Some novices may pierce the nerves when giving intramuscular injections. This situation may cause adverse reactions to the human body. We should understand it in detail. Now let’s introduce the manifestations of muscle needle piercing the nerves.

There may be an electric shock sensation at the time of needle prick. Depending on the severity of the damage to the optic nerve, numbness, tingling, and even functional impairment may occur in the area innervated by the nerve. For example, if the sciatic nerve is damaged during a buttocks injection, lameness may occur. If the injury is not serious, local hot compresses, massage, physical therapy, etc. can be performed, and some nerve nourishing drugs can be taken orally, such as vitamins B1, B6, and B12, and drugs to improve blood circulation such as 654-2, or dibazole, etc. Because nerve damage repairs slowly, recovery is expected in about one or two months. However, those with severe injuries may be left with long-term functional impairment.

Intramuscular injection site

The most commonly used injection site for intramuscular injection is the gluteus maximus, followed by the gluteus medius, gluteus minimus, vastus lateralis and deltoid muscles. Precise positioning of the injection site is very important for intramuscular injection.

Gluteus maximus injection positioning: Cross method: draw a horizontal line from the apex of the gluteal cleft to the left or right, and make a vertical bisector from the highest point of the iliac crest downward to divide the buttocks into four quadrants, among which the upper outer quadrant avoiding the inner corner is the injection area. Line method: The outer third of the line from the anterior superior iliac spine to the coccyx is the injection site.

Injection positioning of gluteus medius and gluteus minimus: There are fewer blood vessels and nerves in this area, and the fat tissue is thinner. It is now more and more widely used. There are two positioning methods:

Intramuscular injection

a Place the tips of the index finger and middle finger on the anterior superior iliac spine and the lower edge of the iliac crest respectively, forming a triangular area between the iliac crest, index finger, and middle finger. The injection site is within the angle formed by the index and middle fingers.

b Three finger widths lateral to the anterior superior iliac spine. The width of the patient's finger should be used as the standard.

Vastus lateralis muscle injection location: The location is the outer side of the middle thigh: For adults, the range from 10 cm below the hip joint to 10 cm above the knee can be selected. There are few large blood vessels and nerve trunks passing through this area, and the area is wide, which can be used for multiple injections.

Injection location for the deltoid muscle of the upper arm: on the outer side of the upper arm, 2 to 3 horizontal fingers below the acromion. The muscles here are thinner than those in the buttocks, so only small doses can be injected.