title: The little finger ulnar palmar digital artery perforator flap: anatomical basis.
abstract: OBJECTIVE
  The aim of this study was to explore the cutaneous vascularization of the hypothenar region and investigate the anatomical basis for perforator propeller flaps for coverage of the flexor aspect of the little finger.
  
  
  METHODS
  The area between the pisiform and the base of the little finger was studied in 14 hands of fresh cadavers injected with red latex. An oval flap 1.5 cm large was raised along the axis between these two points. Perforators going into the flap were dissected up to their origin from the ulnar palmar digital artery of the little finger, and their distance from the proximal edge of the A1 pulley was recorded.
  
  
  RESULTS
  The mean number of perforator arteries entering the flap was 5.8 (range 4-8). A constant sizeable perforator was identified within 0.7 cm from the proximal margin of the A1 pulley in all 14 specimens. In the majority of cases (64 %), the most distal perforator was located at this level. Dissection of the flap was carried out suprafascially on the most distal perforator and 180° rotation allowed the flap to reach the flexor surface of the fifth finger. The donor site was closed primarily.
  
  
  CONCLUSIONS
  Distal perforators of the ulnar palmar digital artery of the little finger are constantly found. Our anatomical findings support the possibility of raising a propeller perforator flap from the hypothenar region for coverage of the flexor aspect of the little finger. Its clinical application could provide a quick and straightforward single-stage option with a negligible donor-site morbidity for reconstruction of such defects.
authors: Chirurgia Plastica e Ricostruttiva, Dipartimento di Discipline Chirurgiche ed Oncologiche, Università degli Studi di Palermo, Via del Vespro, 129, 90127, Palermo, Italy, francescatoia@gmail.com.
authors: Francesca
authors: F
authors: Toia
authors: Marcella
authors: M
authors: Marchese
authors: Barbara
authors: B
authors: Boniforti
authors: Pierluigi
authors: P
authors: Tos
authors: Luca
authors: L
authors: Delcroix
mesh_terms: D005260:Female; D006225:Hand / Q000098:blood supply*; D006801:Humans; D008297:Male; D013524:Surgical Flaps