Commonly used medical equipment includes scalpels, forceps, scissors, clamps, and retractors. Senn retractors are double ended retractors used in surgical procedures. The hospital lacked basic surgical equipment such as retractors. In 4th century CE, Indian physician Susruta used surgical tools such as retractors. Retractors are models which have the particularity of being magnetic braking plates. Surgical retractors probably originate with very basic tools used in the Stone Age. Vesalius described a variety of hooks and retractors in the 16th century. Domineering individuals use lots of qualifiers, retractors, and explainers as well as interruptions. However, the manufacturer now offers lifts retractors. There are up to twenty pairs of perfect mesenteries (internal partitions) with strong retractors.