Dấu hiệu thắt lưng-chậu (Psoas sign)

Mô tả: Pain on passive extension of the thigh.

Nguyên nhân: • Appendicitis • Psoas abscess

Cơ chế: If the appendix is in a retro-caecal position, it may be in contact with the psoas muscle. Therefore, movement of the psoas muscle will move the inflamed appendix, causing pain, with a similar process occurring with a psoas abscess.

Ý nghĩa lâm sàng: Sensitivity of 13–42%, specificity of 79–97%, PLR of 2.0. Caecum lliacus muscle Inflamed appendix Psoas muscle