quiz 1- module 1- part one Flashcards
What single-most important factor has led to improved perinatal mortality rates for women with pre-gestational diabetes
Understanding and management of strict maternal glucose control
the primary focus of nursing care for women who have pre-gestational diabetes
A primary goal of nursing is to provide the woman with information on the changes to her diabetes management due to pregnancy, to help her achieve and maintain excellent blood glucose control.
During pregnancy, where does the growing fetus get glucose from?
Maternal
Where does fetus get insulin from?
Around the 10th week of gestation, the fetus secretes its own insulin at levels adequate to use the glucose obtained from the mother.
insulin production in first trimester and its effects
first trimester and early second trimester:
inc. production of insulin d/t rising levels of estrogen and progesterone– stimulate B cell in the pancreases to inc. insulin production- promotes inc. peripheral use of glucose and dec. blood glucose; at the same time, an inc. tissue glycogen stores and dec. hepatic glucose production, which together further lower the fasting glucose levels. so for type 1 and 2 women – prone to hypoglycaemia during the first trimester.
later second trimester and third trimester
pregnancy exert a diabetogenic effect on the maternal metabolic status d/t dec. tolerance to glucose, inc. insulin resistance, dec. hepatic glycogen stores, inc. hepatic production of glucose. inc. human chorionic somatomammotropin, estrogen, progesterone, prolactin, cortisol and insulin’s inc. increase insulin resistance through their actions — as inulin antagonist.
insulin resistance during sec. and third trimester/ purpose of diabetogenic effect
it is glucose sparing mechanism that ensures a abundant supply of glucose for the fetus; as a result, maternal insulin needs inc. from 18 to 24 weeks to about 36 weeks.
last few weeks of pregnancy
ensure diabetes is not getting worse with inc. insulin.
date of birth
insulin needs drop drastically to approach prepreganancy levels d/t expulsion of the placenta; dec. all insulin antagonist level
for non breastfeeding mother
insulin return to pre-pregnancy level about 7-10 days
for breastfeeding mother
lactation use maternal glucose; so insulin needs is low as long as she is nursing
on completion of warning
breastfeeding mother’s pre-pregnancy insulin needs is re-set
implications of falling insulin need
removal of placenta; drop insulin antagonist level; lactation use maternal glucose
List pregnancy and other health complications for women with poorly controlled pre-gestational diabetes.
Perinatal mortality, congenital malformations, hypertension, preterm delivery, large for- gestational- age infants, caesarean birth and neonatal morbidities.
Pre-eclampsia; preterm birth, caesarean birth and maternal mortality, infection, ketoacidosis
List fetal and neonatal risks and complications associated with diabetes. What complication places neonates at risk for birth injury?
major risk: sudden and unexplained stilldeath.
fetal death complicated by pre-existing diabetes.
hyperglycaemia, keto acidosis, congenital anomalies, infection and mental obesity are thought to be the reason for fetal death.
in the third trimester, fetal acidosis is cause of fetal death.
the most important cause of perinatal loss in diabetic women: congenital malformations –(30-50% of all perinatal loss)
hyperglycaemia during the first trimester, is the main cause of birth defects.
neonate at risk for birth injury: macrosomia d/t response to maternal hyperglycaemia - induce production of excessive insulin.
What is the normal glucose range (euglycemia) for a pregnant woman?
Normal glucose range: 3.4-6.7 mmol/L
Identify priorities for hygiene and personal care a nurse should teach pregnant women with diabetes.
A daily bath should include good perineal and foot care.
Lotions, creams or oils can be applied to dry skin.
The woman should avoid wearing tight clothing.
Always wear shoes or slippers that fit properly, preferably with socks or stockings. Feet should be inspected regularly;
toenails should be cut straight across. Needs to avoid extremes of temperature.
Identify key messages the nurse would include when teaching about meals.
The dietary goals are to have weight gain consistent with a normal pregnancy, prevent ketoacidosis and achieve euglycemia through consistency in carbohydrate intake.
A large bedtime snack of at least 25 g of carbohydrate with some protein is recommended in order to help prevent hypoglycemia and starvation ketosis(when hepatic glycogen stores are exhausted, the liver produces ketones to provide an energy substrate for peripheral tissues.) during the night.
Four food groups: vegetables and fruits; grain products; milk and alternatives; meat and alternatives
Low in energy density and high in volume
divide daily food intake between 3 meals and 2-4 snacks
limit take fat
daily vitamins and iron; folic acid 4 mg/day for the first rimester and then dec. 0.4 mg/day
avoid alcohol and limit caffeine to 300mg/day
Identify key messages the nurse would include when teaching a woman with pre- gestational diabetes about exercise.
Exercise need not be vigorous to be beneficial: 15-30 mins of walking four to six times a week
Other exercises that may be recommended include non- weight bearing activities such as arm ergometry or use of a recumbent bicycle
Best tine for exercise is after meals, when the blood glucose level is rising
Identify key messages the nurse would include when teaching about blood glucose monitoring. What blood glucose levels should be reported to the healthcare provider immediately?
Blood glucose levels are routinely measured at various times throughout the day, such as before breakfast, lunch and dinner; 2 hours after meals; at bedtime; and in the middle of the night
When there is any readjustment in insulin dosage or diet, more frequent measurement of blood glucose is warranted.
If N/V or diarrhea occurs of if any illness is present, the women will have to monitor her BG more closely
Report hypoglycemia – less than 3.2 and hyperglycemia greater than 11
Nurses providing postpartum care (after delivery) to women with pre-gestational diabetes monitor blood glucose levels. What trend will they see and what can they anticipate the antihyperglycemic management will be?
In the immediate postpartum period, insulin requirements decrease substantially d/t the major source of insulin resistance, the placenta has been removed.
Woman with type 1 diabetes may require only require one half the prenatal insulin dose on the first postpartum day
Usually insulin do not give until BG is. Greater than 11.
Many women with type 2 diabetes do not require insulin at all for the first 1-2 days after giving birth; some women require no insulin in the postpartum period and are able to maintain euglycemia through diet alone
Women who give birth by Caesarean may require an IV infusion of glucose and insulin until they resume a regular diet.
Discuss the importance of breastfeeding for infants born to mothers with diabetes.
In addition to the advantage of maternal satisfaction, breastfeeding has an antidiabetogenic effect for the children of women with diabetes and for the women themselves.
Infants who are exclusively breastfed are less likely to develop diabetes; exposure to artificial milk products before 8 days of age is an import risk factor for the disease.
Discuss particular concerns a nurse should assess for when caring for a woman with diabetes who chooses to breastfeed.
The mother may have early breastfeeding difficulties. Poor metabolic control may delay lactogenesis and contribute to dec. milk production
Insulin requirement in breastfeeding women may be one half of pre-pregnancy levels because of the carbohydrate used in human milk production. Because glucose levels are lower than normal, breastfeeding women are at increased risk for hypoglycemia, esp. in the early postpartum period and after breastfeeding sessions, particularly after late- night nursing.
Breastfeeding mothers with diabetes may be at inc. risk for mastitis and yeast infection of the breast.
Why are women who develop gestational diabetes less likely to deliver infants with congenital anomalies than women with pre-gestational diabetes?
Because gestational diabetes usually develops after the week 20th of pregnancy – after the critical period of organogenesis(first trimester) has passed.
Why do some women develop gestational diabetes?
Most pregnant women are capable of increasing insulin production to compensate for the insulin resistance (result from the insulin antagonistic effect of the placental hormones, cortisol and insulinzse.) and maintain euglycemia.
When the pancreas is unable to produce sufficient insulin or the insulin not used effectively, GDM can result.
Which women are considered at higher risk for developing gestational diabetes and should be screened earlier?
Risk factors: (women with multiple risk factors should be screen in the first trimester to identify hyperglycemia early)
• Age>=35
• Previous GDM
• Prediabetes
• Indigenous, lain American, south Asian, Asian, African
• BMI >=30
• Polycystic ovarian syndrome
• Acanthosis nigricans
• Corticosteroid use
• History of macrocosmic infant
• Current fetal macrosomia or polyhydramnios
Within Canada, how are women screened for gestational diabetes?
The sequential test – with a 50g glucose challenge test (GCT), performed between 24- and 28-weeks’ gestation, followed by a 75-g OGTT using glucose cut-off values as defined in fig.14.5 A.
the alternative approach: One-step test – includes a 75g OGTT that is given to a woman between 24- and 28-weeks’ gestation who has been fasting. The plasma glucose is measured within 1-2 hours
What can the nurse do to support these women and families that is different from the support they would offer to a woman who is already knowledgeable about diabetes and its management?
providing detailed and comprehensive explanations to ensure understanding of, participation in, and agreement with the necessary intervention.
Potential complications should be discussed and the need for testing and maintenance of euglycemia throughout the remainder of the pregnancy reinforced.
It may be reassuring for the woman and her family to know that GDM typically disappears when the pregnancy is over.