Eating and Feeding Disorders Flashcards
(58 cards)
What is an Eating Disorder?
- Consistently below or above a person’s caloric needs to maintain a healthy weight
- Can be accompanied by anxiety and guilt (varies with each disorder)
- Occurs without hunger or fails to produce satiety (comfortable fullness)
- Results in physiologic imbalances or medical complications
Factors Contributing to Eating Disorders
- Genetics
- Onset of puberty
- A vulnerable personality
- Being female
- History of obesity
- Dieting that becomes uncontrolled
- Major life changes or stressors
- Family functioning style
- Sociocultural emphasis on slimness
- Perfectionism
- Impulsivity
Physiological Factors causes of Eating Disorders
- Low self-esteem
- Feelings of inadequancy, lack of control in life
- Depression, anxiety, stress, loneliness, trauma
Interpersonal Factors causes of Eating Disorders
- Troubled relationships
- Difficulty expressing emotions
- Hx of being teased based on size/weight
- Hx of physical or sexual abuse
Social Factors causes of Eating Disorders
- Cultural pressues that glorify “thinness” or muscularity
- Narrow definitions of beauty
- Cultural norms that value people on the basis of physical apperance and not inner qualities/strength
Biological Factors
- irregular hormone functions
- Genetics
Neurobiological Etiology of Eating Disorders
Demonstrates that altered brain serotonin function contribute to the dysregulation of appetite, mood, and impulse control
Environmental Etiology of Eating Disorders
- Childhood trauma and sexual abuse have been reported in 20%-50% of patients with eating disorders.
- Those with abuse histories have a poorer prognosis.
- Culture influences the development of self-concept and satisfaction with body size.
Treating Eating Disorders
- Individuals with eating disorders rarely seek help
- They typically are not motivated to change
- They often leave treatment
- Some recover spontaneously, whereas others have long-term problems
Anorexia Nervosa Characteristics
- Intense fear of weight gain
- A severely distorted body image
- Restriction of calories relative to requirements with significantly low BMI
Restricting Type AN
Describes individuals that do not regularly engage in binge-eating or purging behavior (weight loss accomplished through dieting, fasting and/or excessive exercise)
Binge Eating and Purging Type
Refers to those who regularly engage in binge-eating or purging behavior (self-induced vomiting or misuse of laxatives, diuretics, or enemas)
Clinical Signs and Symptoms of AN
- Low body weight (15% or more below what is expected for age, height, activity level)
- Body mass index (BMI) is the gauge used to determine the severity of this disorder. (mild with a BMI of 17 or more, moderate with a BMI of 16 to 17, severe with a BMI of 15 to 16, and extreme when the BMI is less than 15)
- Amenorrhea
- Lanugo
- Mottled, cool skin on extremities
- Peripheral edema
- Lack of energy, fatigue; muscular weakness
- Constipation
- Low blood pressure, pulse and temperature
- Abnormal lab values
- Impaired renal function
- Decreased bone density
- Anemic pancytopenia
Amenorrhea
the loss of menstrual periods in girls and women post-puberty
Lanugo
downy growth of body hair on the face and back
Epidemiology of AN
- Lifetime prevalence is 0.5%
- Female-to-male ratio 3:1
- Commonly begins in adolescence or in young adults; uncommon before puberty or after age 40
- Regardless of gender, disordered eating is more common among athletes who participate in sports that emphasize aesthetics or leanness for advantage in competition
- The prevalence of eating disorders may also be higher among individuals who identify themselves as LGBTQ+
- Anorexia nervosa is less common than bulimia nervosa
- Co-morbid with bipolar disorder, anxiety disorders, OCD, depressive disorders, PTSD and trauma-related disorders and alcohol or substance use disorders
Biological Etiology of AN
- Genetic and familial predispositions; 50-60%
- Genetic correlations between AN and major depressive disorder, anxiety disorders, OCD and schizophrenia
- Glucose and lipid metabolism ?
- Neurobiological: Tryptophan and impact on serotonin synthesis
Psychological and Cognitive Etiology of AN
- Ego-syntonic disorder; know actions are harmful but believe benefits outweigh the harm
- Struggle significantly with emotional identification, regulation, and processing
- Exhibit low distress tolerance and deficits in behavioral control in response to distress.
Environmental Etiology of AN
- Internalization of a thin body ideal
- Associated with cultures that value thinness
Risk Factors AN
- Being female
- Family history of eating disorders
- History of obesity
- Dieting
- Over exercising
- Low self-esteem
- Body dissatisfaction
- Lack of assertiveness
- Other eating disorders
- History of abuse
- Comorbid conditions
- Distorted body image
- Media
- Fashion industry
- Being an athlete
Warning Signs of AN
- Development of food rituals (e.g., eating foods in certain orders, excessive chewing, rearranging food on a plate)
- Consistent excuses to avoid mealtimes or situations involving food
- Excessive, rigid exercise regimen; despite weather, fatigue, illness, or injury, the need to “burn off” calories taken in
- Withdrawal from usual friends and activities
- Behaviors and attitudes indicating that weight loss, dieting, and control of food are becoming primary concerns
Clinical Course of AN
- Chronic condition with relapses characterized by significant weight loss; 1-year relapse rate is approx. 50%
- Often continue to be preoccupied with food
- 10% to 25% go on to develop bulimia nervosa
- 1 in 5 anorexia nervosa deaths is by suicide
- Poor outcome related to initial lower minimum weight, presence of purging, and earlier age of onset
*** Difficult to treat, but recovery can occur in Anorexia Nervosa! **
Complications Due to Weight Loss/Starvation
- Musculoskeletal: loss of muscle mass & fat, early onset osteoporosis
- Metabolic: hypothyroidism (lack of energy, weakness, intolerance to cold & bradycardia), hypoglycemia, electrolyte abnormalities
- Cardiac: bradycardia, hypotension, loss of cardiac muscle, small heart, cardiac arrhythmias, chest pain, sudden death
- Gastrointestinal: delayed gastric emptying, bloating, constipation, abdominal pain, gas & diarrhea, GERD, hemorrhoids
- Reproductive: amenorrhea, irregular periods, loss of libido, infertility
- Dermatologic: dry, cracking skin & brittle nails due to dehydration, lanugo (fine baby-like hair over body), edema, acrocyanosis (bluish hands & feet), & hair thinning, yellowish discoloration of skin, poor wound healing
- Hematologic: leukopenia, anemia, thrombocytopenia, hypercholesterolemia, hypercarotenemia
- Neuropsychiatric: abnormal taste sensation(possibly due to zinc deficiency) apathetic depression, mild organic mental symptoms, sleep disturbances, & fatigue
Initial goals of AN treatment
- Depends on acuity of the patient
- Initiating nutritional rehabilitation; health teaching and promotion