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Updated: May 28, 2026

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Intramuscular Injections Along the Motor End Plates: A Minimally Invasive Approach to Shuttle Tracers Directly into Motor Neurons
Published on: July 13, 2015
A new look at trigger point injections
Clara S M Wong1, Steven H S Wong
1Department of Anaesthesiology, Queen Elizabeth Hospital, 30 Gascoigne Road, Kowloon, Hong Kong.
Anesthesiology Research and Practice
|October 5, 2011
Summary
Ultrasound imaging aids in diagnosing trigger points for pain relief. This technique clarifies injection mechanisms and reduces complications, improving treatment outcomes.
Area of Science:
- Pain management
- Musculoskeletal ultrasound
- Interventional pain medicine
Background:
- Trigger point injections are common pain interventions.
- Objective diagnostic criteria for trigger points are lacking.
- Mechanisms and efficacy of trigger point injections are not fully understood.
Purpose of the Study:
- To explore the role of ultrasound in visualizing trigger points.
- To elucidate the mechanisms of action for trigger point injections.
- To assess the impact of ultrasound guidance on injection efficacy and safety.
Main Methods:
- Utilized ultrasound technology for non-invasive, real-time soft tissue imaging.
- Visualized trigger points using ultrasound.
- Correlated ultrasound findings with clinical presentation and injection outcomes.
Main Results:
- Ultrasound enables clear visualization of trigger points.
- Ultrasound guidance explains injection effects through peripheral nerve blockade.
- Minimization of complications associated with blind injections was observed.
Conclusions:
- Ultrasound technology offers objective visualization of trigger points.
- Ultrasound clarifies the mechanism of action for trigger point injections.
- Ultrasound guidance enhances the safety and potentially the efficacy of trigger point injections.
