Dystocia Flashcards
Most common indication for primary CS delivery
Dystocia
Characterized by abnormally slow progress of labor
Dystocia
What is TRUE LABOR?
There are regular uterine contractions with associated change in cervix effacement and dilation
Hardest part of all stages of labor
Stage 2
What is the first stage of labor?
From regular uterine contraction to full cervical dilation (10cm)
What is the 4th stage of labor?
One hour after the 3rd stage, recovery
What is the third stage of labor?
From delivery of the baby to placental expulsion
2 phases of cervical dilation
Latent Phase and Active Phase
Subdivisions of the Active phase of Cervical Dilation
Acceleration Phase
Phase of Maximum Slope
Deceleration Phase
Start of the preparatory division of labor
Latent phase
The latent phase commences with:
Maternal perception of regular uterine contraction
The latent phase ends between ___________ cervical dilation
3 cm to 4 cm
This phase determine the ultimate outcome of labor
Acceleration phase
This phase is a good measure of overall efficiency of the uterus/machine (efficiency of uterine contraction)
Phase of Maximum Slope
This phase reflects the feto-pelvic relationship
Deceleration phase
The deceleration phase starts at _____ cm dilation
7-8cm
What are the three functional divisions of labor?
Preparatory
Dilatational
Pelvic
Which functional division of labor is sensitive to sedation and analgesia?
Preparatory
The preparatory division of labor includes which phases of cervical dilation?
Latent and Acceleration Phase
Which functional division of labor shows change in connective tissue components of the cervix (e.g., cervical softening)?
Preparatory division
The Dilatational division of labor is in line with which subdivision of the active phase?
Phase of maximum slope
Which of the three functional divisions of labor commences with the deceleration phase of cervical dilatation?
Pelvic division
In which of the three functional divisions of labor the cardinal movements (ED-FIRE-ERE) occur?
Pelvic
The cervical dilatation in the Friedman curve exhibits which shape?
Sigmoidal curve
The Fetal Head descent in the Friedman curve exhibits which shape?
Hyperbolic curve
Average rate of fetal head descent in Nulliparous women:
1 cm/hr
Average rate of fetal head descent in Multiparous women:
2 cm/hr
According to the WHO, the Latent phase should not last more than _____ hours
8 hours
What is the minimum hour delay in cervical dilation recommended for intervention as per the WHO partograph?
4 hours
Which of the following was developed for the purpose of improving labor management, “reducing maternal and perinatal morbidity and mortality” due to obstructed labor?
WHO partograph
Which set of the Modified WHO partograph (2006) focuses on the fetus?
2nd set
The 1st set of the Modified WHO partograph (2006) relates to the progress of which events during labor?
Cervical dilation
Descent of the fetal head
Uterine contractions
Which phase is not observed in the Modified WHO partograph (2006)?
Latent Phase
Which partograph presents the revolutionary steps towards individualized labor care?
WHO Next Generation Partograph (2021) or the
WHO Labour Care Guide (2021)
As per the WHO Labour Care Guide, the active phase stats from ____ cm of cervical dilatation
5 cm
Between the Modified WHO Partograph and WHO Labor Care Guide, which one records the strength, duration, and frequency of uterine contractions?
Modified WHO Partograph
The WHO Labour Care Guide records only the duration and frequency.
Which labor cares were added in the WHO Next Generation Partograph of 2021?
- Second stage monitoring
- Supportive care interventions (companionship, pain relief, oral fluid intake, and posture) recording
- Requirement to respond to deviations from expected observations of any labor parameter
Zhang’s labor pattern recommended that labor be allowed to continue for a longer period of time, before ___ cm dilatation, to reduce the rate of intrapartum and subsequent repeat CS
6 cm
Rate of cervical dilatation for Nulliparous women (Zhang)
0.5-0.7 cm/hr
What is the threshold for active labor according to Zhang?
6 cm
Rate of cervical dilatation for Multiparous women (Zhang)
0.5-1.3 cm/hr
The 2nd stage of labor lasts for ___ hours as per the 95th percentile for nulliparas WITHOUT epidural anesthesia.
2.8 hours
The 2nd stage of labor lasts for ___ hours as per the 95th percentile for nulliparas with epidural anesthesia.
3.6 hours
What is the purpose of the Friedman’s curve?
To define the normal labor pattern
What is the purpose of Zhang’s labor pattern?
To prevent premature caesarian section
What is the shape of the labor curve for WHO partograph (cervical dilation)?
Diagonal or straight lines
What is the shape for the Zhang labor pattern curve (cervical dilation)?
Exponential staircase line
The cervical dilation progression pattern as per Friedman is ____ cm/hr for nulliparas and ____ cm/hr for multiparas
Nulliparas 1.2 cm/hr cervical dilation
Multiparas 1.5 cm/hr cervical dilation
The action line of the WHO partograph is ___ hours from alert line
4 hours
Cervical dilation during the active labor as per the WHO partograph is ___ cm/hr
<1 cm/hr
Which labor pattern validity and usefulness historically governs the labor management?
Friedman’s curve
What are the Maternal Effects of Dystocia
- Intrapartum Infection
- Postpartum hemorrhage from atony
- Pathological retraction ring of Bandl
- Uterine rupture
- Fistula formation
- Pelvic floor injury
mnemonic: PIPPUF
Fetal Effects of Dystocia
Caput succedaneum
Cephalohematoma
Molding
This fetal effect of dystocia results from mechanical trauma of the initial portion of the scalp of the baby pushing though a narrowed cervix in a prolonged or difficult delivery
Caput succedaneum
This fetal effect of dystocia results from the rupture of a periosteal capillary due to pressure of birth or instrumental delivery
Cephalohematoma
This fetal effect of dystocia manifests as swelling that extends across the midline and over suture lines
Caput succedaneum
This fetal effect of dystocia results to swelling of infant’s head for 24 to 48 hours after birth, manifested as clear edges that end at the suture lines
cephalohematoma
Abnormal labor pattern manifested as slower rate of cervical dilation or descent
Prolongation or Protraction disorder
This type of abnormal labor pattern of fast delivery can result to intracranial hemorrhage and atony
Precipitate
How many percent of patients with prolonged or protracted disorders had cephalo-pelvic disproportion (CPD)?
30%
What is the criteria for prolonged latent phase for nulliparas and multiparas?
Nullipara: >20 hours
Multipara: >14 hours
What is the criteria for protracted active phase for nulliparas and multiparas?
clue: same cervical dilatation reference as to Friedman
Nullipara: <1.2 cm/hr
Multipara: <1.5 cm/hr
This pertains to arrested cervical dilatation at 8-9 cm beyond the normal duration
Prolonged deceleration
What is the criteria for prolonged deceleration for nulliparas and multiparas?
Nullipara: >3 hours
Multipara: >1 hour
How many percent of patients with arrest disorders have cephalo-pelvic disproportion?
45%
This is defined as prolonged latent phase
Prolongation disorder
Which of the following is not an etiology of prolongation disorder?
A. Excessive sedation
B. Unfavorable cervix
C. False labor
D. Uterine dysfunction
E. Absence of painful sensation
E. Absence of painful sensation
How many percent of patients with prolongation disorder had false labor?
10%
How many percent of patients with prolongation disorder had ineffective contraction and will benefit from oxytocin stimulation?
5%
A multipara at 15 hours of latent phase will benefit from which management according to POGS (2019)?
Observation, rest, and therapeutic analgesia or strong sedatives
The OCCC admonish against cesarian delivery in the latent phase of labor in the abscence of indications such as:
CPD
Fetal distress (e.g., abnormal FHR)
Abnormal labor pattern that occurs during the first stage of labor, characterized by slow progress of cervical dilatation
Protraction disorder