Clinical nutrition is nutrition of patients in health care. in this sense refers to the management of patients, including not only outpatients at clinics, but also inpatients in hospitals. It incorporates primarily the scientific fields of nutrition and dietetics. It aims to keep a healthy energy balance in patients, as well as providing sufficient amounts other nutrients such as protein, vitamins, minerals.
Dietary needs and disease processes
Normally, individuals obtain the necessary nutrients their bodies require through normal daily diets that process the foods accordingly within the body. Nevertheless, there are circumstances such as disease, distress, stress, and so on that may prevent the body from obtaining sufficient nutrients through diets alone. In such conditions, a dietary supplementation specifically formulated for their individual condition may be required to fill the void created by the specific condition. This can come in form of Medical Nutrition.
In the field of clinical nutrition, malnutrition has causes, epidemiology and management distinct from those associated with malnutrition that is mainly related to poverty. The main causes of clinical malnutrition are:
Cachexia caused by diseases, injuries and/or aging
Clinical malnutrition may also be aggravated by iatrogenic factors, i.e., the inability of a health care entity to appropriately compensate for causes of malnutrition. There are various definitions of clinical malnutrition. According to one of them, patients are defined as severely undernourished when meeting at least one of the following criteria: BMI < or = 20 kg/m2 and/or > or = 5% unintentional weight loss in the past month and/or > or = 10% unintentional weight loss in the past 6 months. By the same system, the patient is moderately undernourished if they met at least one of the following criteria: BMI 20.1–22 kg/m2 and/or 5-10% unintentional weight loss in the past six months.
Medical nutrition therapy
Medical nutrition therapy is the use of specific nutrition services to treat an illness, injury, or condition. It was introduced in 1994 by the American Dietetic Association to better articulate the nutrition therapy process. It involves the assessment of the nutritional status of the client and the actual treatment, which includes nutrition therapy, counseling, and the use of specialized nutrition supplements, devised and monitored by a medical doctorphysician or registered dietitian nutritionist. Registered dietitians started using MNT as a dietary intervention for preventing or treating other health conditions that are caused by or made worse by unhealthy eating habits. The role of MNT when administered by a physician or dietitian nutritionist is to reduce the risk of developing complications in pre-existing conditions such as type 2 diabetes as well as ameliorate the effects any existing conditions such as high cholesterol. Many medical conditions either develop or are made worse by an improper or unhealthy diet. An example is the use of macronutrient preload in type 2 diabetes.
Administration
In most cases the use of Medical Nutrition is recommended within international and professional guidelines. It can be an integral part of managing acute and short-term diseases. It can also play a major role in supporting patients for extended periods of time and even for a lifetime in some special cases. Medical Nutrition is not meant to replace the treatment of disease but rather complement the normal use of drug therapies prescribed by physicians and other licensed healthcare providers. Unlike Medical Foods which are defined by the U.S. Department of Health and Human Services' Food and Drug Administration, ; as “a food which is formulated to be consumed or administered enterally under the supervision of a physician and which is intended for the specific dietary management of a disease or condition for which distinctive nutritional requirements, based on recognized scientific principles, are established by medical evaluation,”
Advantages
The following advantages come with medical nutrition:
It is often very effective in treating type 1 or type 2 diabetes.
