Table 1. The new definition of perforator and corresponding perforated envelope.

Target tissue	Perforator	Envelope
skin	perforator to the skin (skin perforator)	superficial fascia
nerve	perforator to the nerve (nerve perforator)	perineurium
lymph node	perforator to the node (node perforator)	lymph node capsule
fascia	perforator to the fascia (fascia perforator)	peri-fascial areolar tissue
muscle	perforator to the muscle (muscle perforator)	deep fascia
tendon	perforator to the tendon (tendon perforator)	paratenon
bone	perforator to the bone (bone perforator)	periosteum