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Corresponding Author: Dr Anita Mahajan, Director Professor of Anatomy, Maulana Azad Medical College, New Delhi, India. E-Mail: anitamahajan24@gmail.com Introduction: The superficial palmar arch plays a vital role in the blood supply to the hand. The knowledge of variations in the pattern of superficial palmar arch and its branches, and caliber of these arteries, has become more important for surgeons in reconstructive hand surgeries and radial artery harvesting for myocardial revascularization. The aim of this study was to observe the variations and measure the diameter of contributing arteries of the arches. Materials and methods: In the present study, thirty hands from formalin fixed adult human cadavers were dissected. Normal pattern as well as variations in the arteries contributing to the arch, completeness of arch, and the branching pattern were observed and noted. With the help of a digital caliper, the diameters of ulnar and radial arteries and median artery were taken at the level of the wrist and statistical analysis of the results was done. Results: It was observed that in 96.7 % cases, the superficial palmar arch was complete where there was anastomosis between the arteries forming the arch. In 3.3% cases, the arch was incomplete. The complete arch was divided into radioulnar (36.7%), ulnar (56.7%) and medianoulnar (3.3%) types. The diameter of superficial palmar branch of radial artery was found to be significantly less than the diameter of ulnar artery. (p=0.003). Conclusion: The data obtained on variations and morphometry of superficial palmar arches will certainly be useful in planning and choosing appropriate and safe surgical procedures to prevent inadvertent outcome.

VARIATIONS OF THE SUPERFICIAL PALMAR ARCH: A CLINICO-ANATOMICAL CONSIDERATION