Which feature distinguishes an axial pattern flap from a random pattern flap?
- A An axial pattern flap contains muscle, whereas a random pattern flap is skin only
- B An axial pattern flap always requires microvascular anastomosis for survival
- C An axial pattern flap is based on a named arteriovenous pedicle running along its long axis, allowing greater length-to-width ratio than the 1:1 limit of a random flap ✓
- D An axial pattern flap survives entirely on the subdermal plexus at its base
Correct answer: C. An axial pattern flap is based on a named arteriovenous pedicle running along its long axis, allowing greater length-to-width ratio than the 1:1 limit of a random flap
Explanation
Axial pattern flaps are designed around a defined segmental or named artery and vein along their axis, such as the deltopectoral or groin flap, permitting much longer flaps than the traditional 1:1 length-to-breadth ratio that constrains random pattern flaps supplied by the subdermal plexus. An axial flap is raised as a local transposition flap with its pedicle intact and does not require microvascular anastomosis.
Reference: Sabiston Textbook of Surgery, 21st ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.