Physics is everywhere in our daily life. It helps in understanding concepts of surgery easily. Application of physics in surgical field is very helpful especially for a surgeon. In this article we have summarized some common laws of physics, many of them we see in our operation theatre like Poiseuille’s Law, Pascal’s Law, Laplace’s Law, Bernoulli Equation or Theorem, Ohm’s Law, Floating Ball Valve Mechanism, Newton’s Law of Cooling, Laws of Vector and Air-Water Seal System. The application and understanding of these laws would make a surgeon think more like a scientist. Doppler Effect   is used in ultrasonography to evaluate the direction and velocity of blood flow. Reynolds number (NR) is used to predict whether the flow of blood will be laminar or turbulent. The laws of Thermodynamics, Mechanics, and Vectors as they apply to soft and bony tissues. These include the Laplace’s Law as applied to colonic perforation and esophageal varices etc. In Electrocautery, alternating current is passed through a resistant metallic wire electrode and generates heat. The heated electrode is used to achieve hemostasis and dissection.  The Pascal’s Law finds use in hernia repair Keywords: Physics, Surgery, Fundamentals.

Critical limb ischemia (CLI) is considered the most severe clinical manifestation of peripheral artery disease (PAD). These patients carry high risk of amputation and mortality. CLI patientfaces may problems like restriction of movement, starvation of services and depression. Therapeutic goals in treating these patients include relieving ischemic pain, reducing cardiovascular risk factors, preventing major amputation, improving quality of life and increasing survival.Revascularization is the primary treatment strategy in critical limb ischemia patients. Many patients are not treatable by conventional techniques.This review article provides a comprehensive summary that includes current trends in the management of Critical limb ischemia like endovascular revascularization,gene and cell based therapies and drug eluting stents (DESs) etc.