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Trigger Point Injection
Description
Injection of steroids or local anesthetics into selected fascial and subcutaneous locations thought to give rise to pain and other symptoms. Response to trigger point injection routinely persists longer than the duration of action of the agent used. This frequently extends to permanent relief after only one or two anesthetic injections. Because of the rapid response to trigger point injections, they can be useful as a diagnostic tool.
Indications
A “trigger point” that induces or reproduces the patient’s pain complaints. Musculoskeletal pain frequently radiates or is referred to areas distant from the source of the nociceptive signal. Trigger points are hypersensitive areas overlying muscles that induce muscular spasms and pain. They may be found throughout the body but are most common in the abdominal wall, back, and pelvic floor when pelvic pain is the complaint. Myofascial pain syndromes and fibromyalgia frequently demonstrate trigger point involvement.
Contraindications
Known or suspected allergies to any of the agents used (latex, skin preparation materials, etc.), active skin infection, uncorrected blood dyscrasias.
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