Hi everyone,
Have to say I agree with viola above. TrP cannot be seen as a stand-alone method of treating patients however i use them regularly in my treatment of a variety of conditions- to excellent effect. Attending courses in manual release of MTrP's and Dry-needling it was stressed that to try to treat the TrP's alone is not sufficient and in fact is just poor-practice.
In undergrad we did very little soft-tissue release but had large emphasis on manual mobs etc and i feel this did not prepare me for optimising patient treatment. For optimal out-comes in any case all elements of the joint, myofascial and neural restrictions need to be treated along with correction of postural/biomechanical issues and correct re-training of neuro-muscular control(among other things).
I think any clinician woth their salt should always be wary of referred pain especially visceral pain masquerading as a musculoskeletal condition but a detailed history and examination looking out for yellow/red flags should help confirm the diagnosis/need for onward referral.
The key is the diagnosis, I just find that for musculoskeletal conditions release of TrP's is a quick and effective way for restoring soft-tissue to normal length/function in preparation for rehabilitation.
I'm not even going to go into the treatment of myofascial pain using dry-needling/manual release of TrP's which in my experience is extremely effective - however again the clinician and patient need to be aware that unless causative factors are addressed the TrP's will continue to develop.
As for research chris-k mentioned people above but i feel there will be a growing body of evidence in support of treating TrP's over the next few years. Search Jan Dommerholt for a very interesting chapter on craniomandibular pain.
Hope this helps, it's certainly an area that needs more research but a promising one.