Pranashta Shalya Pareeksha: A Comprehensive Review of Classical Diagnostic Principles and Their Application in Traumatic and Battlefield Conditions

Pranashta Shalya, or concealed foreign body, constitutes a highly advanced diagnostic concept within ancient surgical literature, extensively detailed in the 26th chapter of Sushruta Samhita Sutrasthana. This review systematically examines the classical principles of Pranashta Shalya Pareeksha, as documented in Sushruta Samhita, Ashtanga Hridaya, and related Ayurvedic texts, and situates their relevance within traumatic and battlefield surgical contexts. The etymological derivation of Shalya from the roots "Sal" (moving quickly) and "Sval" (causing pain) provides a conceptual basis for understanding foreign body pathology. Sushruta classified Shalya into Shaareera (endogenous) and Agantuka (exogenous) types, and further described Samanya (general) and Vaisesika (specific) diagnostic features according to the tissue of lodgement, such as skin, muscle, veins, arteries, bones, joints, and vital spots (Marma). Fifteen Nirharana Upaya (methods of extraction), ranging from natural expulsion (Svabhava) to magnetic removal (Ayaskanta), are delineated. The review also explores the historical context of military surgery (Yuktaseniya) as described in Sushruta Samhita, Kautilya Arthashastra, and the epics Mahabharata and Ramayana, illustrating the battlefield origins of Shalya Tantra. Modern analogues, including artificial intelligence-driven foreign body detection using deep learning and convolutional neural networks in emergency radiology, are discussed to point out the enduring clinical relevance of these ancient diagnostic frameworks.