The term Ayurveda is derived from two words ayus unified state of physical body etc and veda means knowledge that mean the science of life. Surgery has longer history than using medicine in Ayurveda. Shalya tantra or the technique of surgery is one of the eight branches of (Asthahanga) Ayurveda. Ayurveda surgeons are traditionally known as dhanwanatareeyas (after dhanwantary).
The word shalya is derived from sala-swala which means the foreign body or noxious element which spread all over the body very quickly on entering the body.
Thus this tantra or branches of medical system is so named because of its swiftness and accuracy in dealing the emergencies. Shalya tantra deals with diagnosis and removal of all foreign bodies. grass blades, wooden pieces, sand particles, metallic substances like bullets, rods, nails, etc. Salya is not only means a foreign body but also the substances like mudagarbha pus which is harmful either to body or mind and salyatantra means the measures to eliminate them from the body.
This book based on trividha karma and yogyashasoothreeyam which is described in short for the students. In shalya tantra Trividh karma includes Purva karma (Pre-operative), Pradhan karma (Operative), and Paschat karma (post-operative).
Pre-operative means Preoperative care is the preparation and management of a patient prior to surgery. It includes both physical and psychological preparation.
Or prior to any routine or emergency surgery, investigation need to be done mainly for anaesthesia fitness preoperatively and the preparation of skin is also needed, Pradhan karma means main surgical procedure either minor or major and finally paschat karma means after surgery.