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GI - Malabsorption...
PA CLin Med
83
Health Care
Graduate
02/04/2010

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Term
cornea dryness, night blindness, bitots spots:
Definition
Vit A defficiency
Term
bitot's spots:
Definition
small white spots on conjunctiva assoc w Vit A def.
Term
Vit A def in children results in:
Definition
1. loss of apetite
2. growth retardation
3. anemia
Term
ulcerations and necrosis of cornea, endopthalmitis, blindness:
Definition
late stage Vit A def
Term
keratomalacia:
Definition
ulceration and necrosis of cornea
Term
3 risks/causes of Vit A def.
Definition
1. lack of meat
2. iron def
3. xs etoh depletes Vit A
Term
serves as catalyst in carbohydrate metabolism and helps synthesize nerve regulating substances:
Definition
Vit B1 (thiamine)
Term
irritability, fatigue, HA, leg cramps, muscle weakness
Definition
Vit B1 def
Term
late stage B1 def:
Definition
peripheral neuropathy, cardio & cerebral dysfunction
Term
occurs in infants breast fed by thiamine def mothers:
Definition
Infantile Beriberi
Term
CV sx, peripheral vascular vasodilation, high output failure, dyspnea, tachycardia
Definition
Wet beriberi
Term
neurological sx, symmetrical motor & sensory peripheral neuropathy, loss of reflexes:
Definition
Dry beriberi
Term
nystagmus, opthalmoplegia, truncal ataxia, confusion:
Definition
Wernicke's encephalopathy (Vit B1 def)
Term
amnesia, impaired learning and short term mem, halucinations, confabulations
Definition
Korsakoff syndrome
Term
2 risk factors for thiamine def:
Definition
1. alcoholism
2. chronic dialysis
Term
assists in metabolizing fats, carbohydrates and respiratory proteins:
Definition
Riboflavin B2
Term
affects oral and nasal mucosa, normocytic anemia:
Definition
B2 Riboflavin
Term
Niacin
Definition
B3
Term
Coenzyme involved in redox rxns:
Definition
B3 niacin
Term
anorexia, wekaness, irritability, mouth sores, glossitis, stomatitis, weight loss, dermatitis, confusion, mem loss, psychosis, halucinations, diarrhea
Definition
Niacin B3
Term
dermatitis seen symmetrically in sun exposed areas
Definition
Niacin B3
Term
classic def syndrome w dermaitis, dementia, diarrhea
Definition
Pellagra (Niacin def)
Term
nucleic acid/AA metabolism, enables the body to be able to form Hgb
Definition
B9 (Floate)
Term
diarrhea, weight loss, weakness, sore tongue, HA, palpitations, irritabiliry, behavioral d/o, slow growth rate:
Definition
Folate (B9)
Term
B9 def is of greatest concern in:
Definition
pregnancy; causes LBW, premature births, neural tube defects (spinabifida)
Term
macrocytiv anemia:
Definition
B9 def
Term
Best indication for tissue folate:
Definition
RBC folate
Term
Med for diabetics that may mess with folate utilization':
Definition
metformin
Term
6 major risk factors for B9 def:
Definition
1. prego/lactation
2. EtOH
3. Smoker
4. malabsorption (celiac)
5. dialysis
6. Liver dz
Term
coenzyme in nucleic acid metabolism, fxn of nervous sys & RBC formation:
Definition
B12 (cobalamin, cyanobalamin)
Term
commonly asx, tiredness, decreased mental work capacity, irritability, depression, mem loss, confusion:
Definition
B12 def
Term
anorexia, diarrhea, glossitis, numbness/tingling of extremities, difficulty with balance, eventual dementia w ataxic gait:
Definition
B12 def
Term
diabetic med that interferes with B12 absorption:
Definition
Metformin
Term
cause of selective impaired absorption of B12:
Definition
IF def
Term
principal site of absorption for B12:
Definition
terminal ileum
Term
infection that will compete for B12 absorption:
Definition
fish tapeworm
Term
common among vegetarians/vegans that don't take supplements:
Definition
B12 def
Term
elevated serum levels of __ &__ are reliable factors of B12 def:
Definition
Homocystine & Methylmalonic acid which are converted to AA via B12.
Term
ascorbic acid =
Definition
Vit C
Term
plays roles in collagen, carnitine, hormone and AA formation:
Definition
Vit C
Term
essential for wound/burn healing supports immune fxn as antioxidant and facilitates absorption of iron:
Definition
Vit C
Term
early sx: fatigue depression, weakness, irritability, weight loss, vague myalgias/arthralgias
Definition
Vit C
Term
later sx: gingivitis, petechiae, rash, purpura, perifollicular hemorrhage, impared wound healing, loose teeth, impared bone growth in children:
Definition
Vit C def
Term
terminal sx: edema, oliguria, neuropathy, intracranial hemorrhage, death
Definition
Vit C def
Term
dz characterized by hemorrhagic manifestations & abn osteoid and dentin formation:
Definition
Scurvy (Vit C def)
Term
involved in formation of intracellular cement substances in connective tissues:
Definition
Vit C
Term
recommended doses for Vit C:
Definition
75mg/daily for women
90mg/daily for men
smokers add 35mg,
Term
the upper limit for vit C intake is:
Definition
2000mg/day
Term
most is made in the body with a conversion of cholesterol by UV light
Definition
Vit D
Term
Vit D converted in the ___ & the ____ to a hormone called ______
Definition
converted in the liver and kidneys to a hormone called 1,25-dihydroxy-vit D
Term
3 fxns of 1,25-OH Vit D:
Definition
1. keeps Ca++ at a constant level
2. promotes GI absorption of Ca++
3. promotes bone growth/mineralization
Term
3 fxns of 1,25-OH Vit D:
Definition
1. keeps Ca++ at a constant level
2. promotes GI absorption of Ca++
3. promotes bone growth/mineralization
Term
5 food sources for Vit D:
Definition
1. cod liver oil
2. egg yolks
3. butter
4. oily fish
5. fortified: milk/cereal/formula
Term
2 risk factors for Vit D def:
Definition
1. no fortified food intake
2. no UV exposure
Term
def causes ricketts, osteomalacia:
Definition
Vit D
Term
rachitic rosary:
Definition
bony bumps on ribs in vit D def.
Term
bowed legs and arms:
Definition
rickets - vit D def
Term
Dx of vit D def:
Definition
25-OH-D levels
Term
which hormone works with vit D to regulate Ca++ levels?
Definition
parathyroid hormone
Term
important for clotting, involved in the formation of active prothrombin:
Definition
Vit K
Term
early HDN seen wn 24hrs of birth:
Definition
Vit K def
Term
wn 7-14 days of birth; bleeding from skin, gut circumcision site:
Definition
Vit K def
Term
seen 2-12 wks after birth; intracranial hemorrhage:
Definition
late stage vit K def
Term
2 Rx that interfere with Vit K metabolism:
Definition
Warfarin & Phenytoin
Term
may occur following abx tx that depletes flora contributing to vit synthesis:
Definition
Vit K def
Term
define primary lactose intolerance:
Definition
low levels of lactase develop after childhood
Term
secondary lactose intolerance:
Definition
caused by injury to intestinal mucosa (diarrhea) or reduction in available mucosal surface.
Term
50% of infants with diarrhea get secondary lactose intolerance due to:
Definition
rotavirus
Term
ethnicities mostly involved in lactase def.:
Definition
Asians, Black, Native Amer = 85%
Term
when do low intestinal lactase levels develop
Definition
about 5 yo
Term
meds for lactose intolerance:
Definition
lactase OTC
Term
autosomal recessive d/o def in enzyme phenylalanine hydroxylase
Definition
PKU - Phenylketonuria
Term
diet for PKU:
Definition
diet low in phenylalanine and high in tyrosine is effective
Term
early detection of PKU is crutial bc:
Definition
damage done is irreversible
Term
pathophys of PKU:
Definition
defective PAH which converts phenylalanine to tyrosine build up phenylalanine which is converted to phenylketones that show in urine. build up of pALA in blood staurates BBB transporters of large neutral AA and other LNAA can't get to brain>MR
Term
malabsorption dz related to immune rxn to gluten:
Definition
Celiac dz
Term
when are the 2 peaks of incidence in celiac dz:
Definition
1. infancy following cereal intake 80%
2. adults 40-50yo 20%
Term
infancy - abd pain, diarrhea (+/-blood), failure to thrive, poor weight gain.
Definition
Celiac dz
Term
childhood - abd pain w nausea, anemia, mouth sores, allergic dermatitis, irritability, emotionally withdrawn, protruberant abd, thin thigh muscles, flat buttocks
Definition
celiac dz
Term
teenagers with short stature and alopecia:
Definition
celiac dz
Term
fatigue, anemia, change in bowel habits, low impact fracture
Definition
adult presentation - celiac
Term
lab test fir celiac:
Definition
tissue transglutaminase antibodies
Term
30-40% of caucasian population with about 1/2 reporting sx; flatulence, bloating, abd pain/discomfort, nausea, loose stools diarrhea, constipation, floating or oily stools
Definition
fructose malabsorption
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