Maternal Physio 2 Flashcards
Cardiovascular system
Changes apparent during the
First 8 weeks
Cardiovascular system
CO increased as early as
5th week
Cardiovascular system
Brachial systolic BP, diastolic BP and central systolic BP are significantly lower
6-7 weeks from the LMP
Cardiovascular system
Plasma blood volume expansion begins, and preload is increased
10-20 weeks
Cardiovascular system
Heart
Elevated diaphragm
Left upward displacement
Larger cardiac silhouette
Increase cardiac silhouette
Cardiovascular system
Cardiac sounds
1st heart sound - exaggerate splitting
2nd heart sound - no changes
3rd heart sound- loud
Cardiovascular system
Physiologic hypertrophy
Cardiac plasticity
Cardiovascular system
90% of pregnant women, they also heard
Systolic murmur that was intensified during inspiration
Cardiovascular system
Ventricular function during pregnancy is normal, as estimated by the
Braunwald ventricular function graph
Cardiovascular system
Cardiac function and
Myocardial function
Eudynamic
Normal
Cardiovascular system
Remodeling in
Nonpregnat and
Pregnant
Longitudinal remodeling
Spherical remodeling
Cardiovascular system
Cardiac output
Decrease
Mean arterial pressure
Vascular resistance
Cardiovascular system
Cardiac output
Increase
Blood volume
Basal metabolic rate
Cardiovascular system
Cardiac output
At rest
Lateral recumbent position
Increase
Early pregnancy
Cardiovascular system
Cardiac output
Supine woman
Large uterus compresses venous return
Late pregnancy
Cardiovascular system
Cardiac output
Maternal cardiac output is augmented by almost another 20% because of greater stroke volume and heart rate
Multiple pregnancy
Cardiovascular system
Cardiac output
Implies reduced cardiovascular reserve in multiple gestations
Increased HR
Inotropic contractility
Cardiovascular system
Cardiac output
Increase moderately
1st stage of labor
Cardiovascular system
Cardiac output
With vigorous expulsive efforts
2nd stage of labor
Cardiovascular system
Hemodynamic function in late pregnancy
Normal pregnancy is not a continuos “high output” state
Cardiovascular system
Circulation and blood pressure
Changes in posture affect
Arterial BP
Cardiovascular system
Circulation and blood pressure
When sitting is lower than lateral recumbent supine position
Brachial artery
Cardiovascular system
Circulation and blood pressure
Diastolic pressure _____ more than systolic
Decrease
Cardiovascular system
Circulation and blood pressure
Supine femoral venous pressure rises from 8mmhg in
Early pregnancy to 24mmhg at term
Cardiovascular system
Circulation and blood pressure
Venous BF in the legs is retarded during pregnancy except in
Lateral recumbent position
Cardiovascular system
Circulation and blood pressure
10% supine compression of the great vessels by the uterus causes significant arterial hypotension, referred to as
Supine hypotensive syndrome
Cardiovascular system
Renin angiotensin 2, and plasma volume
Involved in Bp control via sodium and water balance
Renin angiotensin aldosterone axis
Cardiovascular system
Renin angiotensin 2, and plasma volume
All components of this system
Increase din normal pregnancy
Cardiovascular system
Renin angiotensin 2, and plasma volume
Renin produced by
Maternal kidney
Placenta
Cardiovascular system
Renin angiotensin 2, and plasma volume
Increase renin substrate (angiotensinogen) is produced by
Both maternal and fetal liver
Cardiovascular system
Renin angiotensin 2, and plasma volume
Increased estrogen production during pregnancy
Important in first T BP maintenance
Cardiovascular system
Renin angiotensin 2, and plasma volume
Pregnant women lose their acquired vascular refractories to angiotensin 2 within 15-30minutes after the
Placenta is delivered
Cardiovascular system
Renin angiotensin 2, and plasma volume
Exogenous progesterone does not restore angiotensin 2 refractories to women with gestational hypertension, this can be done with infusion of its major metabolites
5alpha dihyroxyprogesterone
Cardiovascular system
Cardiac Natriuretic Peptide
Secreted by cardiomyocytesin response to chamber wall stretching
Atrial natriuretic peptide
B-type natriuretic peptide
Cardiovascular system
Cardiac Natriuretic Peptide
Increased in severe preeclampsia caused by cardiac strain from increased after load
BNP
Cardiovascular system
Cardiac Natriuretic Peptide
Induced physiological adaptations participate in ECF volume expansion and in the increased plasma aldosterone
ANP
Cardiovascular system
Cardiac Natriuretic Peptide
Secreted by non cardiac tissue pred
C-type natriuretic peptide
Cardiovascular system
Cardiac Natriuretic Peptide
Major regulator of fetal bone growth
C type natriuretic peptide
Cardiovascular system
Increase in production is thought to have a central role in control of vascular tone, BP and sodium balance.
Prostaglandins
Cardiovascular system
Increased during late pregnancy and is presumed to be natriuretic
Renal medullary prostaglandin E2 synthesis
Cardiovascular system
Principal prostaglandin of endothelium.
Increased in late pregnancy and regulates Bp and platelet function
Prostacyclin PG12
Cardiovascular system
Considered important in preeclampsia pathogenesis
PG12 and
Thromboxane
Cardiovascular system
Potent vasoconstrictor produced in endothelial and vascular smooth muscle cells and regulate local vasomotor tone
Endothelin 1
Cardiovascular system
Endothelins production is stimulated by
Angiotensin 2
Arginine vasopressin
Thrombin
Cardiovascular system
Endothelin1 stimulate secretion of
ANP
Aldosterone
Cathecolamines
Cardiovascular system
Counter balance the endothelins 1 vasoconstrictor effects and reduce peripheral vascular resistance
Vasodilating factors
Cardiovascular system
Potent vasodilator
Implications for modifying vascular resistance during pregnancy
One of the most important mediators of placenta vascular tone an development
Nitric oxide
Cardiovascular system
Abnormal NO syntesis has been linked to
Preeclampsia development
Respiratory system
Diaphragm rises 4 cm Subcostal angle widens Transverse diameter lengthens Thoracic circumference increase Excursion of diaphragm is greater
Sa cardio and no change ay
ANP
Respiratory system
No change
RR
Lung compliance
Max. Breathing capacity
Forced or timed vital capacity
Respiratory system
Decrease
FRC
Residual volume
Total pulmonary resistance
Respiratory system
Increase
Tidal volume Resting minute ventilation Peak expiratory flow rate Airway conductance Oxygen requirement Critical closing time
Respiratory system
Imposed by pregnancy make respiratory disease more serious
Increased oxygen
Increased critical requirements
Respiratory system
Decreases by approximately 20-30% or 400-700ml
Functional residual capacity
Respiratory system
Decrease 15-20% or 200-300 ml
Expiratory reserve volume
Respiratory system
Decrease 20-125% or 200-400ml
Residual volume
Respiratory system
Max volume that can be inhaled from FRC increases
Inspiratory capacity
Respiratory system
Combination of FRC and inspiratory capacity is unchanged or decreases by less than 5% at term
Total lung capacity
Respiratory system
Essentially unchanged
Respiratory rate
Respiratory system
Increase significantly as pregnancy advances
Tidal volume and resting minute ventilation
Respiratory system
Increase progressively as gestation advances
Peak expiratory flow rates
Respiratory system
Unaffected by pregnancy
Lung compliance
Respiratory system
Increased
Airway conductance
Respiratory system
Reduced possibly as result of progesterone
Total pulmonary resistance
Respiratory system
Not altered
Maximu breathing capacity
Forced or timed vital capacity
Respiratory system
Lung volume at which airways in the dependent parts of the lung begin to close during expiration is higher in pregnancy
Closing volume
Respiratory system
In oxygen delivery, lahat increase except?
Maternal AV O2 different kasi decrease sya
Respiratory system
Acid base equilibrium
Lahat decrease except
Desire to breathe
Blood pH
Kasi increase to, hahahaha
Respiratory system
Reduction of PCO2 is likely induced in large part of
Progesterone and to a lesser degree by estrogen
Respiratory system
Blood pH increased minimally but shifts
Oxygen dissociation curve to the left
Respiratory system
Decreasing the oxygen releasing capacity of maternal blood
Bohr effect
Respiratory system
Slightly pH increase also stimulates an increase also stimulates an
Increase in 2,3 di phosphoglycerate in maternal erythrocytes
Urinary system
Increase
Size
GFR (early)
Renal plasma flow (early)
Urinary system
Decrease
GFR
Renal plasma flow. (Late)
Urinary system
Factors of hyper filtration
Hypervolemia
Renal plasma flow increase
Urinary system
Reversal of gestational Hypervolemia and hemodilution also evident on the ____________ and eventuates by the __________
1st postpartum day
2nd postpartum week
Urinary system
Increases endothelin and NO production in the renal circulation
Relaxin
Urinary system
May increase vascular gelatinase activity during pregnancy
Relaxin
Urinary system
Urinary flow and sodium excretion average less than 1/2 in
Supine position compared to lateral recumbent position
Urinary system
Renal function test
Decrease
Serum creatinine
Urinary system
Renal function test
Increase
Creatinine clearance
Bile cholesterol saturation
Urinary system
Decrease during pregnancy
Serum creatinine level
Urinary system
During pregnancy may not be abnormal
Glucosuria
Urinary system
May result from contamination during collection and if not often suggest to urinary tract disease
Hematuria
Urinary system
Common after difficult labor and delivery because of trauma to the bladder or urethra
Hematuria
Urinary systems
Excretion rate of atleast 300 mg/day
Proteinuria
Urinary system
Ureters
Which is remarkably dilated lies obliquely over the right ureter and may contribute significantly to
Right ureteral dilatation
Urinary system
Ureters
Unequal dilatation may result from cushioning provided the left ureter by the sigmoid colon and perhaps from greater right ureteral compression exerted by the
Dextrorotated uterus
Urinary system
Ureters
Accompany distention and the ureter is frequently thrown into curves of varying size, the smaller may be sharply angulated
Ureteral elongation
Urinary system
Urinary bladder
Increase lahat except
Bladder capacity (decrease) Mucosa (no change)
Gastrointestinal system
Decrease lahat except
Intragastric pressure (increase) Gastric emptying time ( no change)
Gastrointestinal system
Subsides postpartum
Pregnancy gingivitis
Gastrointestinal system
Focal, highly vascular swelling of the gums
Epulis gravidarum
Gastrointestinal system
Occasionally develops but regresses
Pyrogenic granuloma
Gastrointestinal system
Common during pregnancy and most likely caused by reflux of acidic secretions into the lower esophagus
Pyrosis (heartburn)
Gastrointestinal system
Common, caused by constipation and elevated pressure in veins below the level of the enlarged uterus
Hemorrhoids
Liver
Increase
Hepatic blood flow Portal vein diameter Alkaline phophatase Total albumin Serum globulin Leucine amino peptidase
Liver
Decrease
AST
ALT
GGT
Bilirubin
Liver
No change
Liver size
Gall bladder increase
Residual volume
Bile cholesterol saturation
Gallbladder decrease
Contractility
Endocrine system
Growth hormone
Secreted predominantly from the maternal pituitary gland and concentrations in serum and amniotic fluid
1st. T
Endocrine system
Growth hormone
Secreted from the placenta become detectable
At 8 weeks
Endocrine system
Growth hormone
Placenta is the principle source of Ghon
At 17 weeks
Endocrine system
Growth hormone
In amniotic fluid peaks at
14-15 weeks
Decline after 36 weeks
Endocrine system
Growth hormone
Differs from pituitary GH by 13 amino acid residues, secreted synchitiotropoblast
Placental GH
Endocrine system
Prolactin
Increase during normal pregnancy and concentration are usually 10x greater at
Term
Endocrine system
Prolactin
Decrease
After delivery kahit nag breast feed
Endocrine system
Oxytocin and ADh
ADH do not change during pregnancy
Vasopressin def, associated with DI
Endocrine system
Secreted by the hypothalamus and stimulates thyrotrope cells of the anterior pituitary to release thyroid stimulating hormone
Thyroptropin-releasing hormone
Endocrine system
Most common preventable cause of impaired neurological development after famine
Iodine deficiency
Endocrine system
Decrease in plasma calcium or acute decrease in magnesium stimulate
PTH release
Endocrine system
Increase calcium and magnesium levels
Suppress PTH release
Endocrine system
Considered to oppose those of PTH and vitamin D
Calcitonin
Endocrine system
Increase calcitonin plasma level
Gastrin hormones
Food ingestion
Endocrine system
Increase calcium and magnesium
Secretion of calcitonin
Endocrine system
Increase fetal blood
Deoxycorticosterone
Endocrine system
Androgen
Both androsterone and testosterone is elevated
Endocrine system
Principal mineralocorticoid
Aldosterone
Sleep
12 weeks difficulty going to sleep
Eyes
IOP decrease attributed to increased vitreous outflow
Decreased corneal sensitivity
Cardiovascular system
Lahat increase except
Systemic vascular resistance
Arterial BP