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Factors associated with failure of trigger point injections
1Department of Anesthesiology, Medical College of Wisconsin, Milwaukee 53226.
The Clinical Journal of Pain
|September 1, 1994
Summary
Factors like unemployment, prolonged pain duration, and social activity changes predict poor outcomes for myofascial pain syndrome trigger point injections. Alcohol use may decrease failure risk.
Area of Science:
- Pain Medicine
- Musculoskeletal Disorders
- Physical Therapy
Background:
- Myofascial pain syndrome (MPS) is a common cause of chronic pain.
- Trigger point injections (TPIs) are a frequent treatment for MPS.
- Predictors of TPI success in MPS remain incompletely understood.
Purpose of the Study:
- To identify patient-specific factors influencing TPI outcomes in MPS.
- To assess the risk of treatment failure associated with various pre-existing factors.
Main Methods:
- A cohort of 193 MPS patients receiving TPIs completed baseline questionnaires.
- Thirty-one factors from patient evaluation and physical examination were analyzed.
- Univariate and logistic regression analyses identified independent predictors of short-term treatment outcome.
Main Results:
- Univariate analysis linked unemployment, constant pain, prolonged duration, social activity changes, and poor coping to higher failure risk.
- Alcohol use showed a decreased risk of treatment failure.
- Logistic regression identified lack of employment, prolonged pain duration, and social activity changes as independent predictors of outcome.
Conclusions:
- Pre-existing patient factors significantly influence TPI outcomes for MPS.
- Pain is a multidimensional experience, necessitating consideration of various factors for effective treatment.
- Identifying at-risk patients may allow for tailored treatment strategies.