Nails

Nail care is more than the proper maintenance of the fingernails and toenails. A nail is a horn-like envelope covering the dorsal aspect of the terminal phalanges of fingers and toes. The nail is made of a hard protein called keratin. Nails can dry out, just like skin. They can also peel, break, and become infected. The nail protects the ends of the fingers and toes from trauma and helps pick up small objects. Care of the fingernails and toenails is important. Poor nail care causes problems. Recommendations for maintaining nail health include: keeping nails clean and dry in order to keep bacteria and other infectious organisms from collecting under the nails; cutting nails straight across with only slight rounding at the tip; using a fine-textured file to keep nails shaped and free of snags; and avoiding nail-biting. Nail changes, swelling and pain can signal serious problems that may require a physician and medical nail care. Medical nail care includes preventing and treating diseases. Nail diseases are distinct from diseases of the skin. Although nails are a skin appendage, they have their own signs and symptoms, which can relate to other medical conditions. Nail conditions that show signs of infection or inflammation require medical assistance beyond a beauty parlor. Deformity or diseases of the nails are onychosis. Onychia is an inflammation of the nail folds of the nail with formation of pus and shedding of the nail. Onychia results from the introduction of microscopic pathogens through small wounds. The medical term for ingrown nails is onychocryptosis. Ingrown nails can affect the fingers and the toes. With this condition, the nail cuts into one or both sides of the nail bed, resulting in inflammation and possibly infection. The relative rarity of this condition in the fingers suggests that pressure from the ground or shoe against the toe is a prime cause. The movements involved in walking or other physical disturbances can contribute to the problem. Mild onychocryptosis in the absence of infection is treatable by trimming and rounding the nail. In more advanced cases including infection, doctors perform matrixectomy by surgically excising the in growing portion of the nail down to its bony origin and thermally or chemically cauterizing the matrix to prevent recurrence. The best results are by cauterizing the matrix with phenol.

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Surgery

An act of performing surgery may be called a surgical procedure, operation, or simply surgery. In this context, the verb operates means to perform surgery. The adjective surgical means pertaining to surgery; e.g. surgical instruments or surgical nurse. The patient or subject on which the surgery is performed can be a person or an animal. A surgeon is a person who performs operations on patients. In rare cases, surgeons may operate on themselves. Persons described as surgeons are commonly physicians, but the term is also applied to podiatrists, dentists and veterinarians. A surgery can last from minutes to hours, but is typically not an ongoing or periodic type of treatment. The term surgery can also refer to the place where surgery is performed, or simply the office of a physician, dentist, or veterinarian. At a hospital, modern surgery is often done in an operating theater using surgical instruments, an operating table for the patient, and other equipment. The environment and procedures used in surgery are governed by the principles of aseptic technique: the strict separation of sterile free of microorganisms things from unsterile or contaminated things. All surgical instruments must be sterilized, and an instrument must be replaced or re-sterilized if it becomes contaminated i.e. handled in an unsterile manner, or allowed to touch an unsterile surface. Operating room staff must wear sterile attire scrubs, a scrub cap, a sterile surgical gown, sterile latex or non-latex polymer gloves and a surgical mask, and they must scrub hands and arms with an approved disinfectant agent before each procedure. Prior to surgery, the patient is given a medical examination, certain pre-operative tests, and their physical status is rated according to the AS A physical status classification system. If these results are satisfactory, the patient signs a consent form and is given a surgical clearance. If the procedure is expected to result in significant blood loss, an autologous blood donation may be made some weeks prior to surgery. If the surgery involves the digestive system, the patient may be instructed to perform bowel prep by drinking a solution of polyethylene glycol the night before the procedure. Patients are also instructed to abstain from food or drink to minimize the effect of stomach contents on pre-operative medications and reduce the risk of aspiration if the patient vomits during or after the procedure. In the pre-operative holding area, the patient changes out of his or her street clothes and is asked to confirm the details of his or her surgery. A set of vital signs are recorded, a peripheral IV line is placed, and pre-operative medications are given. When the patient enters the operating room, the skin surface to be operated on, called the operating field, is cleaned and prepared by applying an antiseptic such as chlorhexidine gluconate or povidone-iodine to reduce the possibility of infection. If hair is present at the surgical site, it is clipped off prior to prep application. The patient is assisted by an anesthesiologist or resident to make a specific surgical position, sterile drapes are used to cover all of the patient's body except for the head and the surgical site or at least a wide area surrounding the operating field. The drapes are clipped to a pair of poles near the head of the bed to form an ether screen, which separates the anesthetist/anesthesiologist's working area from the surgical site. Anesthesia is administered to prevent pain from incision, tissue manipulation and suturing. Based on the procedure, anesthesia may be provided locally or as general anesthesia. Spinal anesthesia may be used when the surgical site is too large or deep for a local block, but general anesthesia may not be desirable. With local and spinal anesthesia, the surgical site is anesthetized, but the patient can remain conscious or minimally sedated. In contrast, general anesthesia renders the patient unconscious and paralyzed during surgery. The patient is intubated and is placed on a mechanical ventilator, and anesthesia is produced by a combination of injected and inhaled agents. An incision is made to access the surgical site. Blood vessels may be clamped to prevent bleeding, and retractors may be used to expose the site or keep the incision open. The approach to the surgical site may involve several layers of incision and dissection, as in abdominal surgery, where the incision must traverse skin, subcutaneous tissue, three layers of muscle and then peritoneum. In certain cases, bone may be cut to further access the interior of the body; for example, cutting the skull for brain surgery or cutting the sternum for thoracic surgery to open up the rib cage.