Controversy over use
There remains controversy over the use of RAD as an unofficial diagnosis. With its use not only being limited to clinical lexicon, but also transitioning to clinical literature now, more physicians are now increasingly disapproving its use in the healthcare setting.One of the largest problems with the using RAD as a diagnostic label lies in the ambiguity of its meaning, as RAD has no true clinical definition. It is either not listed or redirects to "asthma" in all major medical journal or website. In addition to that, it is also not recognized in the American Academy of Pediatrics; the American Thoracic Society; or the National Heart Lung and Blood Institute. In addition, treatments for asthma, chronic bronchitis, emphysema, or pneumonia may not be prescribed under a label of reactive airway disease. In contrast, some physicians also fear overtreatment for RAD, as patients can be prescribed inhaled beta-agonists or inhaled corticosteroids, which are medications used for asthma. If an individual with RAD doesnt have asthma, there is no evidence these treatments are beneficial. As a result of its ambiguous place in the medical field, the symptoms used to characterize it are often inconsistent and can lead to confusion in a healthcare setting.
Spinal anesthesia was first used in 1885, but not introduced into clinical practice until 1899, when August Bier subjected himself to a clinical experiment in which he observed the anesthetic effect, but also the typical side effect of postpunctural headache. Within a few years, spinal anesthesia became widely used for surgical anesthesia and was accepted as a safe and effective technique. Although atraumatic (noncutting-tip) cannulae and modern drugs are used today, the technique has otherwise changed very little over many decades. Epidural anesthesia by a caudal approach had been known in the early 20th century, but a well-defined technique using lumbar injection was not developed until 1921, when Fidel Pagés published his article "Anestesia Metamérica". This technique was popularized in the 1930s and 1940s by Achile Mario Dogliotti. With the advent of thin, flexible catheters, continuous infusion and repeated injections have become possible, making epidural anesthesia still a highly successful technique. Besides its many uses for surgery, epidural anesthesia is particularly popular in obstetrics for the treatment of labor pain. See also
Amylocaine
Anesthetic
General anesthetic
List of cocaine analogues
List of local anesthetics

References
External links
The American Society of Regional Anesthesia
Regional Anesthesia and Pain & Medicine