title: A new look at trigger point injections.
abstract: Trigger point injections are commonly practised pain interventional techniques. However, there is still lack of objective diagnostic criteria for trigger points. The mechanisms of action of trigger point injection remain obscure and its efficacy remains heterogeneous. The advent of ultrasound technology in the noninvasive real-time imaging of soft tissues sheds new light on visualization of trigger points, explaining the effect of trigger point injection by blockade of peripheral nerves, and minimizing the complications of blind injection.
authors.affiliation: Department of Anaesthesiology, Queen Elizabeth Hospital, 30 Gascoigne Road, Kowloon, Hong Kong.
authors.forename: Clara S M
authors.initials: CS
authors.lastname: Wong
authors.forename: Steven H S
authors.initials: SH
authors.lastname: Wong