Table 2 Biopsy yield, quality, safety, and acceptance of biopsy procedure for gluteus medius myofascial trigger point (GTP) and descending trapezius myofascial trigger point (TTP) samples and control (vastus lateralis) samples
|  | GTP (n = 10) | TTP (n = 10) | Vastus Lateralis (n = 20) |
|---|---|---|---|
Mean biopsy yield (mg) | 3.7 ± 1.6 | 3.4 ± 2.2 | 3.8 ± 2.1 |
Mean microscopic biopsy quality (1–5)a | 4.9 ± 0.32 | 4.7 ± 0.48 | 4.7 ± 0.47 |
Clinical wound assessment (number of patients without signs for local infection and inflammation), n | 10 | 10 | 20 |
Mean ultrasonic volume of hematoma (cm3) | 0 | 0 | 0 |
Surgical complications, n | 0 | 0 | 0 |
Mean pain (NRS) at biopsy location after 7 days | 0.25 ± 0.35 | 1.1 ± 2.3 | 0.2 ± 0.4 |
Procedure burden at biopsy location (1–4)b | 3.2 ± 0.8 | 3.1 ± 0.99 | 3.1 ± 0.91 |