Anatomical Study Of Superficial Palmar Arch And Its Variations With Clinical Significance

Background: Superficial Palmar Arch (SPA) is an arterial arcade usually formed by the continuation of ulnarartery and the superficial branch of radial artery. Variations can occur in the vessels contributing to the formationof SPA. Knowledge of such variations will be very much helpful to microvascular surgeons, plastic surgeons andorthopaedicians to bring a better outcome in their surgical procedures. Also, it will be useful to the cardiovascularsurgeons to carryout radial artery harvesting procedures for the purpose of Coronary Artery Bypass Grafting. Themain objective is to study the different patterns of formation of the superficial palmar arch with an emphasis ontheir clinical importance.Materials and methods: This study was done in 40 upper limb specimens from 20 embalmed human adultcadavers at the Institute of Anatomy, Madras Medical College, Chennai. In every upper limb specimen, the palmwas dissected as per the steps described in the Cunningham’s Manual of Practical Anatomy. The SuperficialPalmar Arch was exposed and the vessels taking part in its formation were studied. Variations in the formationof Superficial Palmar Arch were noted and analysed.Results: Out of 40 specimens, the Superficial Palmar arch was found to be complete in 29 specimens (72.5%) andincomplete in 11 specimens (27.5%).Conclusion: Information about the different patterns in the formation of the Superficial Palmar Arch will beextremely useful for hand surgeons, microvascular surgeons, plastic surgeons and orthopaedicians to bring outa successful and beneficial postoperative outcome. Awareness about these variations will also help in appropriateinterpretation of investigations prior to radial artery harvesting for the purpose of Coronary Artery BypassGrafting.