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Table 2 Number of trigger points and results of anaesthetic trigger points injections

From: Myofascial trigger points in cluster headache patients: a case series

Patient Number and location of TrPs* Abortive injection Preemptive injection Prophylactic injection: mean decrease in attacks' frequency # of injections/time (months)
1 1: (R) T N/D effective ------ 3
2 2: (L) P, T effective N/D ------ 6
3 4: (B) B, EP effective effective ------ 10
4 2: (R) SO, T N/D N/D ------ 3
5 4: (B) SO, T N/D N/D 50% 24/7
6 6: (B), EP, M, T N/D N/D 100%** 12/3
7 9: (L) A, EP, F, P, R, ST, S, T effective effective 100% 32/8
8 5: EP, M, P, SD, T N/D not effective no change 24/6
9 3: (L) SD, (B)T not effective effective 50% 17/4
10 4: (B) SO, T N/D N/D 90%** 24/3
11 1: (L) EP effective effective 100% 14/1
12 4: (L) EP, F, N, P, T effective effective 90% 14/1
  1. *: A angular, B buccinator, EP external pterygoideus, F frontalis, M masseter, N nasalis, P procerus, R rhomboid, S sternocleidomastoid, SD superior digastric, SO suboccipital group, ST superior trapezius; T temporalis; letters between parenthesis indicate laterality. N/D: not done; **: required a change in the prophylactic drug therapy