labor and birth (unit 1) Flashcards
cardiovascular changes during labor
- during ctx 400 mL blood emptied from uterus into maternal system
- mom CO, BP, HR increase
- blood flow to placenta decrease
cardiovascular NSG Imp during labor
- check VS b/t ctx
- discourage Valsava maneuver
- keep off back
- monitor BP hourly
respiratory changes during labor
- > O2 consumption
- depth/rate respirations inc. w/ pain
- hyperventilate (risk for alkalosis)
respiratory NSG imp during labor
- monitor for tingling, numbness, dizziness (resp. alkalosis)
- have pt breathe into cupped hands
GI changes during labor
- GI motility dec.
- thirst/dry mouth
- N/V; belching @ full dilation
GI NSG imp during labor
- admin anti-emetic (Phenergan)
- keep NPO (exc. ice chips)
- monitor for Mendelson’s syndrome
Mendelson’s Syndrome
- aspiration of food or acidic gastric contents leads to pneumonia
- prevented by keeping women in labor NPO in case general anesthesia required
renal/GU changes during labor
•spontaneous voiding difficult
-tissue edema after birth
-regional anesthesia (epidural)
•proteinuria 1+ normal b/c breakdown of muscle tissue
renal NSG imp during labor
- maybe cath
- encourage void q2h
- swollen bladder makes it difficult for baby to progress
blood changes during labor
- H&H of >11g/dL and 33% will prevent complications
- WBC inc
- clotting factor inc
- SVD: lose 500 cc blood
- C/S: lose 1000 cc blood
NSG Imp blood changes during labor
•know admission H&H to compare w/ PP
•monitor blood loss
***1st sign of hypovolemia is tachycardia
fetal circulation during labor
•during ctx, blood to placenta from mom dec.
•placental exchange occurs b/t ctx to supply enough for fetus
*why resting phase is important
NSG Imp fetal circulation during labor
•ensure ctx not too close or last too long
fetal pulmonary system
•lungs filled w/ fluid as fetus •labor prepares fetus for respirations -PO2 dec -CO2 inc -pH changes -temp changes
vaginal squeeze
•during birth, fetal thorax is squeezed and fld is expelled into upper airway
-surfactant prevents alveoli from sticking
•c/s baby will have more difficulty breathing
doulas
- female labor attendant
- one on one physical/emotional care
- DONT provide medical care
- don’t leave at shift change
- act as advocate
what starts birth
•no single cause
- distention of uterus
- cervix ripen
- pit release oxytocin
- fetal/maternal hormone inc
- aging placenta
- changes take place days-weeks before labor begins
pitocin
- drug derivative of oxytocin
- ctxs the uterus
- given to mom after delivery
lightening
- preceding labor sign
* baby descends into pelvis
bloody show
- preceding labor sign
- capillaries in cx break, so blood mixed w/ mucous
- pink (bright red is concerning)
mucous plug
- preceding labor sign
- up to 2 weeks prior
- “wine cork” that comes out of os when cervix ripens
other signs preceding labor
- braxton hicks ctx
- increased energy
- nesting instinct
- wt loss
- GI s/sx
7 cardinal movements
•position changes fetus undergoes to move thru birth canal
- engagement
- descent
- flexion
- internal rotation
- extension
- restitution
- expulsion
engagement
- widest part of fetal head passes pelvic inlet into station 0 or lower (in line of maternal pelvis)
- primips: 2-3 wks prior to birth (dropped)
- multips: occurs during labor
descent
- head progresses thru pelvis
* accelerates after 5-7 cm
flexion
- head becomes maximally flexed b/c meeting resistance w/ cervix/pelvic floor
- chin to chest makes smaller diameter that has to pass thru cervix
internal rotation
•fetal occiput rotates to lateral anterior position as it progresses to lower pelvis in corkscrew motion
extension
- fetus extends neck as passes thru symphysis
* head deflected anteriorly and born by extension of chin away from chest
restitution
•head turns 45 degrees back to position it occupied as it entered pelvic inlet to realign w/ shoulders
expulsion
- first anterior, then posterior shoulders are born (down then up)
- followed by the rest of the body
5 factors effecting labor (Ps)
- passenger
- passageway
- power
- position
- psyche
passenger
- fetus and placenta
* fetal ability to navigate birth canal based on head size, presentation, lie, altitude, and position
fetal head size
- not fused, so molded as passes thru canal
* fontanels allow bones to move and change shape
fetal presentation
- part of fetus that enters pelvis first
- cephalic 96%
- breech 3%
- shoulder 1%
vertex or occiput presentation
- back of head presents first
* preferred
military presentation
- neutral position
* top of head presents first
brow presentation
•head partially extended
face presentation
•head fully extended
breech presentation
- buttocks enters pelvis first
- usually r/t problem
- often need C/S
shoulder presentation
- fetus presents in transverse line
* requires C/S
fetal lie
•relationship of fetal spine to mom’s
longitudinal lie
- head/butt in pelvis
* 99% of the time
transverse lie
•long axis of fetus R angle to mom spine
oblique lie
•fetus is at some angle
fetal attitude
- relationship of fetal parts to one another
* normal is w/ head flexed toward chest and arms and legs flexed over thorax; back convex C
fetal position
•relationship of fetal spine to 4 quadrants of maternal pelvis
fetal postion abbreviation
- fetal spine on R or L of maternal pelvis
- Occiput or Sacrum presenting
- Anterior, Posterior, Transverse (side)