Specialized Nutrition Support Flashcards
three major types of SNS
- oral nutrition supplements
- enteral nutrition
- parenteral nutrition
SNS is defined as
the provision of nutrients orally, enterally, or parenterally with therapeutic intent
ONS is usually prescribed for patients in which
in which oral diet is tolerated but there is an inadequate ingestion of nutrients in the form of a standard oral diet
ONS has a major role in
improving homebound elderly persons and nutrition after GI and hip fracture surgeries
EN is defined as
nonvolitional delivery of nutrients by tube into the GI tract
EN is usually prescribed for patients in which
oral intake is inadequate while GI function is intact and accessible
is feeding enterostomy long term or short term?
long term and typically requires a surgery
examples of feeding enterstomies?
gastrostomy
jujunostomy
percutaneous endoscopic gastrostomy(PEG)
percutaneous endoscopic jujunostomy (PEJ)
which feeding enterostomies can be placed at bedside?
PEG and PEJ
is nasal tube feeding short term or long term?
short term
examples of nasal tube feeding
nasogastric (NG)
nasoduodenal (ND)
nasojejunal (NJ)
is oral tube feeding short term or long term?
short term
oral tube feeding is generally reserved for what patients?
patients with endotracheal intubation
examples of oral tube feeding
orogastric (OG)
oroduodenal (OD)
orojejunal (OJ)
advantages of EN
- reduced cost compared to PN
- better maintenance of gut integrity
- reduced rate of infection
- decreased hospital length stay compared to PN
nasogastric tube complications
- mucosal ulceration
- clogging
- esophageal perforation
- pneumothorax
- GI bleeding
- pulmonary aspiration
gastrostomy complications
- aspiration
- dislodgements
- bleeding
- wound infection
- stomal leakage
- tube occlusion
- pneumoperitoneum
jejunostomy complications
- pneumatosis intestinalis
- bleeding
- dislodgement
- bolvulus
- bowel obstruction
- stomach leakage
- wound infection
contraindications of EN
diffuse peritonitis, intestinal obstruction, intractable vomiting, paralytic ileus, intractable diarrhea, and gastrointestinal ischemia
diffuse peritonitis
acute widespread attack of the peritoneum and usually caused by infection or perforation of an abdominal organ
PN is prescribed for patients in which
oral intake is inadequate and who cannot be fed via the GI tract
two types of PN
total parenteral nutrition (TPN) and peripheral parenteral nutrition (PPN)
TPN is administered via
central venous catheter (CVC)
TPN has the ability to
maximize caloric intake and volume restrict patients
disadvantages of TPN
CRBSI and central venous thrombosis
CRBSI
catheter related blood stream infections; TPN is an independent risk factor for this
central venous thrombosis
most commonly reported complication with BSI, occurs in 45% of patients with CVC’s
PPN is administered via
peripheral catheter
energy intake and PPN
limited energy intake due to concentration restrictions (unable to volume restrict)
can SNS be treated as an emergency
NEVER
indication of SNS
- individuals who cannot, should not, or will not eat adequately
- benefits of improved nutrition outweigh the risks
- patients who are malnourished or at significant risk for becoming malnourished
nutrition screening identifies
changes in a patient’s condition that effect nutritional status, risk factors that place a patient a nutrition risk and that may lead to a nutrition related problem, and identifies individuals who are malnourished or at risk for malnutrition
malnutrition can be considered
deficiency of nutrient intake, impaired nutrient metabolism, or over-nutrition
consequences of malnutrition are generally related to
premorbid condition, extent and length of time nutrient intake is inadequate, or concurrent presence of other diseases/illnesses
factors indicative of malnutrition
- involuntary loss/gain of 10% or more of usual BW within 6 months
- involuntary loss/gain of 5% or more of usual BW within 1 month
- BW of > 20% or more over or under IBW (especially in the presence of chronic disease or increased metabolic requirements)
- inadequate nutrition intake (impaired ability to ingest/absorb food)
objective indicators to screen for malnutrition
height, weight, weight change, primary diagnosis, and presence of comorbidities
nutrition assessment is defined as
a comprehensive approach to defining nutrition status
nutrition assessment includes
medical, nutrition, and medication histories; physical examination; anthropometric measurements; lab data
evaluation of nutrition status consists of two components
nutrition assessment and metabolic assessment
nutrition assessment
utilizes static measurements of body compartments and examines the alteration caused by undernutrition
metabolic assessment
includes analysis of the structure and function of organ systems; altered metabolism; metabolic response to nutrition intervention
goals of nutrition assessment are
- to identify patients who are malnourished or at risk for malnutrition
- to collect the information necessary to create a nutrition care plan
- to monitor the adequacy of nutrition therapy
BMI of 14-15 kg/m2
increased mortality
BMI < 18.5 kg/m2
underweight
BMI > 25 kg/m2
overweight
BMI < 30 kg/m2
obese
patient history you should ask about
weight, changes in eating habits, GI function, nature/severity of underlying disease, or unusual personal dietary habits/restrictions
what is the best marker of nutrition status on admission?
albumin
when a patient is stressed does albumin increase or decrease?
decrease - this makes it a poor marker of changes in nutrition status
half life of albumin
15-20 days
transferrin is typically elevated in
iron deficiency anemia
half life of transferrin
7-8 days
prealbumin is used to
assess nutrition status changes in response to therapy
half life of prealbumin
2-3 days
what should be included in a nutrition care plan?
nutrition goals, ROA of nutrition support, and goals of nutrition care/intervention
nutrition monitoring should be done how often in a hospital? in outpatient?
daily in hospitals
every week or month in outpatient
nutrition management is based off of
nutrition status, disease, organ function, metabolic condition, medication use, and duration of nutrition support
dosing weight is ideally based on
lean body mass
dosing weight equation
IBW + 0.25 (ABW-IBW)
are energy requirements patient specific?
yes
range of energy requirements
20 to 35 kcal/kg daily
protein range
0.8 gm/kg daily to gm/kg daily
protein provides how many kcals?
4 kcal/gm
final protein concentrations in PN formulation range from
2 to 7%
carb requirements should not exceed
7/gm/kg daily
dextrose provides how many kcals?
3.4 kcal/gm
final concentrations of dextrose in PN formulation ranges from
10% to 35%
Lipid requirements should not exceed
2.5 gm/kg daily
how many kcals do lipids provide?
10 kcal/gm
1) 10% of intralipids provides..
2) 20% of intralipids provides..
3) 30% of intralipids provides..
1) 1.1 kcal/mL
2) 2 kcal/mL
3) 3 kcal/mL
what to monitor to determine efficacy of SNS
repletion of lean body mass, reduction in morbidity, optimization of clinical outcomes, improve quality of life, utilize surrogate markers
surrogate markers of nutrition status
energy balance, body composition analysis, body weight measurements, serum protein concentrations, protein balance, and nitrogen balance
the ultimate goal of SNS is
to improve clinical outcomes such as, quality of life, morbidity/mortality, length of hospital stay, and cost
complications of SNS
- refeeding syndrome
- hyperglycemia
- hypoglycemia
- acid-base abnormalities
- hypertriglyceridemia
- excessive CO2 production
- hepatic steatosis
- vascular access sepsis
- thrombosis
- gastroesophageal reflux
- pulmonary aspiration
- GI complications
refeeding syndrome presents as
fluid, micronutrient, electrolyte, and vitamin imbalances
refeeding syndrome may involve..
hemolytic anemia
respiratory distress
cardiac arrhythmias
lab findings in refeeding syndrome
decreased phosphate, magnesium, and potassium
prevention of refeeding syndrome
replete serum electrolytes prior to SNS, limit initial carb intake to 150 gm/day and fluid to 800 mL/day, provide adequate amounts of electrolytes in the initial formation, increase carb-dependent minerals in proportions to increased carbs when SNS is advanced (K, Mg, PO, Zn)