TABLE 4.

Blood vessel density for all bursal locations

Sample location	Blood vessel density, median (%, IQR), number samples (n)
All samples	3.0 (1.6–4.8), (n = 43)
SAB roof	3.4 (1.9–4.6), (n = 13)
Proximal a	3.9 (2.7–6.2), (n = 9)
Distal b	1.9 (0.8–3.5), (n = 4)
SAB floor	1.8 (1.1–3.2), (n = 11)
CBB roof	1.6 (1.1–2.4), (n = 6)
CBB floor	1.6 (1.4–4.6), (n = 5)
SSB roof	4.9 (3.2–5.6), (n = 8)

Abbreviations: CBB, coracobrachial bursa; IQR, interquartile range; SAB, subacromial bursa; SSB, subtendinous bursa of subscapularis.

^a Deep to the acromion or coracoacromial ligament and 5–10 mm distal to the acromion or coracoacromial ligament.

^b 5–10 mm proximal to or covering the greater tubercle.