Module 04: Components of Labor Flashcards
What are the 6 P’s of Labor or the critical factors affecting the process of labor?
(A) Passenger (fetus)
(B) Passageway (birth canal)
(C) Power (uterine contractions or bearing down)
(D) Psyche (mental status)
(E) Prayer (spiritual needs)
Who is characterized as the passenger?
Fetus
What are the different types of fetopelvic relationships?
(A) Lie
(B) Attitude
(C) Presentation
(D) Position
(E) Station
This is primary related to the fetal skull and is characterized to be the larges part of the newborn’s body.
Fetal Head (size: 1/4 of the newborn’s length)
What are the different types of cranial bones?
(A) Sphenoid
(B) Ethmoid
(C) Temporal
(D) Frontal or sinciput
(E) Occipital or the occiput
(F) Parietal
What are the different types of suture lines?
(A) Coronal
(B) Sagittal
(C) Lambdoidal
This suture line connects two parietal bones.
Sagittal
This suture line connects the parietal and frontal bones.
Coronal
This suture line connects the parietal and occipital bones.
Lambdoidal
This is characterized as the overlapping of the sutures of the skull to permit the passage of the head to the pelvis.
Molding
These are used as landmarks for internal examination during labor to determine the position of the fetus.
Fontanels
How many fontanels are palpable?
Two
This fontanel is characterized to be diamond in shape and is 3 x4 centimeters in size.
Anterior Fontanel or Bregma
This fontanel is characterized to be triangular in shape and is 1 x 1 centimeters in size.
Posterior Fontanel or Lambda
This can maybe be manipulated during delivery to allow passage of one shoulder at a time.
Fetal Shoulder
What are the different important measurements of the fetal head?
Transverse Diameter
(A) Bi-parietal (9.25 cm, largest transverse)
(B) Bi-temporal (8.0 cm)
(C) Bi-mastoid (7.0 cm, shortest transverse)
This is known as the relationship of the spine (long axis) of the fetus to the spine of the mother.
Fetal Lie
In this fetal lie, the fetus’ long axis is parallel with the mother’s long axis. About 99% of cases assume this position.
Longitudinal or vertical (Cephalic: 95%)
In this fetal lie, the fetus is sideways at a 90-degree angle to your spine instead of head up or head down (perpendicular).
Transverse or horizontal (Not normal (malpresentation)
In this fetal lie, the baby’s head is in the mother’s hip. The baby’s body and head are diagonal, not vertical and not horizontal (transverse lie); resembles an x position.
Oblique
This pertains to the relationship of the fetal parts to each other. This also describes the degree of flexion the fetus assumes during labor.
Fetal Attitude
This fetal attitude is normal. This occurs when the chin touches the sternum; vertex to the birth canal.
Complete flexion
This fetal attitude is characterized as the military attitude; occipital frontal or sinciput to birth canal.
Moderate flexion
This fetal attitude is characterized as the brow to the birth canal.
Partial flexion
This fetal attitude is characterized as the face or mentum to the birth canal.
Complete extension
This fetal attitude is the most common and has no contour. Under this, the head is fully flexed on the chest making the parietal bones of the space between the fontanels, the “vertex”, the presenting part.
Vertex or Occiput
Under this fetal attitude, the head is moderately flexed and the sinciput becomes the presenting part.
Sinciput or Military Position
Under this fetal attitude, the back is arched and the neck is extended.
Brow
Under this fetal attitude, the head is extended and the face becomes the presenting part.
Face (not recommended because extreme edema and face distortion may occur)
This pertains to the part of the fetus that presents to or enters the maternal pelvic inlet.
Fetal Presentation
What are the different types of fetal presentation?
(A) Cephalic or vertex (95% of labors)
(B) Breech (34%)
(C) Shoulder or transverse (rare; 1%)
What are the different types of breech presentations?
(A) Complete Breech
(B) Incomplete Breech
(1) Frank breech
(2) Footling breech
(3) Kneeling breech