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Презентация на тему Diagnosis and mangement of abnormal labour

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Labor refers to uterine contractions resulting in progressive dilation and effacement of the cervix, and accompanied by descent and expulsion of the fetus
Diagnosis and mangement of abnormal labourDr.Entesar Al-MadaniObstetrician, Gynecologist & perinatologist Labor refers to uterine contractions resulting in progressive dilation and effacement of Abnormal labor, dystocia, and failure to progress are imprecise terms that have A better classification is to characterize labor abnormalities as protraction disorders (ie, Approximately 20 percent of labors involve either protraction or arrest disordersA labor NORMAL LABOR Friedman, in his classic studies, divided labor into three stagesFirst NORMAL LABORThird stage: time from expulsion of the fetus to expulsion of NORMAL LABORFirst stage = A + B + C + D where Latent phase The onset of the latent phase of labor begins when Latent phaseThis phase is typically characterized by mild infrequent contractions and a Latent phaseThe average duration of latent phase in nulliparous and multiparous women Latent phaseAn abnormally long latent phase is defined as 20 hours for Active phase  The beginning of the active phase typically occurs when the Active phaseThe active phase is characterized by painful contractions of increasing frequency, Active phaseThe average duration of the active phase in nulliparous and parous Active phaseAn abnormally long active phase is defined as 12 hours for Second stage The mean duration of the second stage of labor in Second stageabnormally long second stage as three hours for the nulliparous and Second stageNeuraxial anesthesia, duration of the first stage, parity, maternal size, birth Second stage(ACOG) recommends that the normal duration of second stage of labor Normal uterine activity  Uterine activity can be monitored by palpation, external tocodynamometry, Normal uterine activityExternal and intrauterine monitoring devices appear to perform equally well, Normal uterine activityNinety-five percent of women in active labor will have three Normal uterine activityMontevideo units (ie, the peak strength of contractions in mmHg Normal uterine activity91 percent of women in spontaneous active labor achieved contractile CLASSIFICATION AND DIAGNOSIS OF LABOR ABNORMALITIES Diagnostic criteria for abnormal patterns in active labor Values represent approximately two Protraction and arrest disorders occur in both the first and second stages In the first stage of labor progressive dilatation slower than the rate An arrest disorder can be diagnosed when the cervix ceases to dilate second stage of laborprotracted labor is defined as a second stage longer An arrest of descent can be diagnosed after one hour if there labor can be too fast as well as too slow ETIOLOGY Abnormal labor can be the result of one or more abnormalities Risk factors for abnormal labor The passages (the pelvis)Pelvic inlet A-P  11.5 cm The passages (the pelvis)The clinician's ability to predict maternal pelvis-fetal size discordance Clinical or radiologic assessment of the maternal pelvis (ie, pelvimetry) is associated The passengerFetal weight, larger babies will have greater difficulty in passing through The passengerThe most common presentation is vertex, which occurs in 96 percent The passengerThe occiput is on the longer end of the head lever. The passengerOccipitofrontl 11.5 cm (Brow presentation) The powersHypocontractile uterine activity is the most common cause of protraction or The powersThis entity refers to uterine activity that is either not sufficiently The powersIt occurs in 3 to 8 percent of parturients and can The powersNeuraxial anesthesia neuraxial anesthesia is associated with an increased duration of The powersNeuraxial anesthesia has not been proven to increase the rate of cesarean delivery The powersIt is possible that changes in neuraxial technique or drugs (eg, The powersThe consequences of withdrawing the block before the second stage of MANAGEMENT  disciplined approach to the diagnosis of labor, assessment of maternal and Advancement of cervical dilation charted on a partogram. MANAGEMENT Poor progression in the first stage  Hypocontractile uterine activity is treated with MANAGEMENT Other — Other interventions, such as ambulation and continuous labor support, may increase the MANAGEMENT Poor progression in the second stage Three options:Continued observation Attempt at operative Thank you
Слайды презентации

Слайд 2
Labor refers to uterine contractions resulting in progressive

Labor refers to uterine contractions resulting in progressive dilation and effacement

dilation and effacement of the cervix, and accompanied by

descent and expulsion of the fetus

Слайд 3
Abnormal labor, dystocia, and failure to progress are

Abnormal labor, dystocia, and failure to progress are imprecise terms that

imprecise terms that have been used to describe a

difficult labor pattern that deviates from that observed in the majority of women who have spontaneous vaginal deliveries

Слайд 4
A better classification is to characterize labor abnormalities

A better classification is to characterize labor abnormalities as protraction disorders

as protraction disorders (ie, slower than normal progress) or

arrest disorders (ie, complete cessation of progress)

Слайд 5
Approximately 20 percent of labors involve either protraction

Approximately 20 percent of labors involve either protraction or arrest disordersA

or arrest disorders
A labor abnormality is the most common

indication for primary cesarean birth

Слайд 6 NORMAL LABOR
Friedman, in his classic studies, divided

NORMAL LABOR Friedman, in his classic studies, divided labor into three

labor into three stages
First stage: time from the onset

of labor until complete cervical dilatation
Second stage: time from complete cervical dilatation to expulsion of the fetus

Слайд 7 NORMAL LABOR
Third stage: time from expulsion of the

NORMAL LABORThird stage: time from expulsion of the fetus to expulsion

fetus to expulsion of the placenta

The first stage

is further subdivided into the latent and active phases, the active phase subdivided into three additional phases: acceleration phase, phase of maximum slope, and deceleration phase


Слайд 8 NORMAL LABOR
First stage = A + B +

NORMAL LABORFirst stage = A + B + C + D

C + D where
A=latent phase; B=acceleration phase; C=phase

of maximum slope; D=deceleration phase Second stage = E

Слайд 9 Latent phase
The onset of the latent phase

Latent phase The onset of the latent phase of labor begins

of labor begins when the mother perceives regular contractions.



Слайд 10 Latent phase
This phase is typically characterized by mild

Latent phaseThis phase is typically characterized by mild infrequent contractions and

infrequent contractions and a gradual change in cervical dilation

(usually <1 cm per hour) and effacement


Слайд 11 Latent phase
The average duration of latent phase in

Latent phaseThe average duration of latent phase in nulliparous and multiparous

nulliparous and multiparous women is 6.4 and 4.8 hours,

respectively, and is not influenced by maternal age, birth weight, or obstetric abnormalities

Слайд 12 Latent phase
An abnormally long latent phase is defined

Latent phaseAn abnormally long latent phase is defined as 20 hours

as 20 hours for the nullipara and 14 hours

for the multiparous woman
It reflect four standard deviations from the mean duration of latent phase in the women

Слайд 13 Active phase 
The beginning of the active phase

Active phase  The beginning of the active phase typically occurs when

typically occurs when the cervix has reached 3 to

4 centimeters dilation

Слайд 14 Active phase
The active phase is characterized by painful

Active phaseThe active phase is characterized by painful contractions of increasing

contractions of increasing frequency, intensity, and duration accompanied by

a rapid rate of cervical change (usually >1 cm hour)

Слайд 15 Active phase
The average duration of the active phase

Active phaseThe average duration of the active phase in nulliparous and

in nulliparous and parous women is 4.6 and 2.4

hours, respectively

Слайд 16 Active phase
An abnormally long active phase is defined

Active phaseAn abnormally long active phase is defined as 12 hours

as 12 hours for the nullipara and 5 hours

for the multiparous woman

Слайд 17 Second stage
The mean duration of the second

Second stage The mean duration of the second stage of labor

stage of labor in nulliparous and multiparous women is

66 and 20 minutes, respectively

Слайд 18 Second stage
abnormally long second stage as three hours

Second stageabnormally long second stage as three hours for the nulliparous

for the nulliparous and one hour for the multiparous

woman

Слайд 19 Second stage
Neuraxial anesthesia, duration of the first stage,

Second stageNeuraxial anesthesia, duration of the first stage, parity, maternal size,

parity, maternal size, birth weight, and station at complete

dilation all play a role in predicting duration of the second stage

Слайд 20 Second stage
(ACOG) recommends that the normal duration of

Second stage(ACOG) recommends that the normal duration of second stage of

second stage of labor be based upon parity and

presence of regional anesthesia, with no intervention as long as the fetal heart rate pattern is normal and some degree of progress is observed

Слайд 21 Normal uterine activity 
Uterine activity can be monitored

Normal uterine activity  Uterine activity can be monitored by palpation, external

by palpation, external tocodynamometry, or internal uterine pressure catheters



Слайд 22 Normal uterine activity
External and intrauterine monitoring devices appear

Normal uterine activityExternal and intrauterine monitoring devices appear to perform equally

to perform equally well, although the latter may work

better in obese women

Слайд 23 Normal uterine activity
Ninety-five percent of women in active

Normal uterine activityNinety-five percent of women in active labor will have

labor will have three to five contractions per 10

minutes

Слайд 24 Normal uterine activity
Montevideo units (ie, the peak strength

Normal uterine activityMontevideo units (ie, the peak strength of contractions in

of contractions in mmHg measured by an internal monitor

multiplied by their frequency per 10 minutes) are most often employed

Слайд 25 Normal uterine activity
91 percent of women in spontaneous

Normal uterine activity91 percent of women in spontaneous active labor achieved

active labor achieved contractile activity greater than 200 Montevideo

units and 40 percent reached 300 Montevideo units

Слайд 26 CLASSIFICATION AND DIAGNOSIS OF LABOR ABNORMALITIES

CLASSIFICATION AND DIAGNOSIS OF LABOR ABNORMALITIES

Слайд 27 Diagnostic criteria for abnormal patterns in active labor

Diagnostic criteria for abnormal patterns in active labor Values represent approximately



Values represent approximately two standard deviations from the mean


Слайд 28
Protraction and arrest disorders occur in both the

Protraction and arrest disorders occur in both the first and second

first and second stages of labor

The incidence is about

15 percent in either stage

Слайд 29
In the first stage of labor
progressive dilatation

In the first stage of labor progressive dilatation slower than the

slower than the rate shown in the table is

suggestive of a protraction disorder

Слайд 30
An arrest disorder can be diagnosed when the

An arrest disorder can be diagnosed when the cervix ceases to

cervix ceases to dilate after reaching four or more

centimeters dilatation despite adequate uterine contractions (greater than or equal to 200 Montevideo units for two or more hours)

Слайд 31
second stage of labor
protracted labor is defined as

second stage of laborprotracted labor is defined as a second stage

a second stage longer than two hours in nulliparas

(three hours when regional analgesia is used), and longer than one hour in multiparas (two hours when regional analgesia is used)

Слайд 32
An arrest of descent can be diagnosed after

An arrest of descent can be diagnosed after one hour if

one hour if there is no descent, despite good

maternal pushing efforts

Слайд 33
labor can be too fast as

labor can be too fast as well as too slow

well as too slow
The term precipitous labor refers

to a labor that lasts no more than 3 hours from onset of contractions to delivery
A precipitous second stage refers to a second stage that is less than 15 to 20 minutes in duration.

Слайд 34 ETIOLOGY
Abnormal labor can be the result of

ETIOLOGY Abnormal labor can be the result of one or more

one or more abnormalities of the cervix, uterus, maternal

pelvis, or fetus (ie, power, passenger, or pelvis)

Слайд 35 Risk factors for abnormal labor

Risk factors for abnormal labor

Слайд 36 The passages (the pelvis)

Pelvic inlet A-P 11.5 cm

The passages (the pelvis)Pelvic inlet A-P 11.5 cm   transversely

transversely 13.6 cm
Mid

cavity all diameters 12 cm
Pelvic outlet A-P 12.5 cm
transverely 10.5 cm

Слайд 37 The passages (the pelvis)
The clinician's ability to predict maternal

The passages (the pelvis)The clinician's ability to predict maternal pelvis-fetal size

pelvis-fetal size discordance (cephalopelvic disproportion) leading to arrest of

labor requiring cesarean delivery has been disappointing

Слайд 38 Clinical or radiologic assessment of the maternal pelvis

Clinical or radiologic assessment of the maternal pelvis (ie, pelvimetry) is

(ie, pelvimetry) is associated with poor predictive value
The

passages (the pelvis)

Слайд 39 The passenger
Fetal weight, larger babies will have greater

The passengerFetal weight, larger babies will have greater difficulty in passing

difficulty in passing through the pelvis
Unfavorable position of the

presenting part
Fetal abnormalities such as hydrocephalus

Слайд 40 The passenger
The most common presentation is vertex, which

The passengerThe most common presentation is vertex, which occurs in 96

occurs in 96 percent of fetuses at term


Слайд 41 The passenger
The occiput is on the longer end

The passengerThe occiput is on the longer end of the head

of the head lever. The chin is directly posterior.

Vaginal delivery is impossible unless the chin rotates interiorly
Occipitomental 12.5cm(face presentation mento posterior)

Слайд 42 The passenger
Occipitofrontl 11.5 cm (Brow presentation)

The passengerOccipitofrontl 11.5 cm (Brow presentation)

Слайд 43 The powers
Hypocontractile uterine activity is the most common

The powersHypocontractile uterine activity is the most common cause of protraction

cause of protraction or arrest disorders in the first

stage of labor

Слайд 44 The powers
This entity refers to uterine activity that

The powersThis entity refers to uterine activity that is either not

is either not sufficiently strong or not appropriately coordinated

to dilate the cervix and expel the fetus

Слайд 45 The powers
It occurs in 3 to 8 percent

The powersIt occurs in 3 to 8 percent of parturients and

of parturients and can be quantified as uterine contraction

pressures less than 200 Montevideo units.

Слайд 46 The powers
Neuraxial anesthesia
neuraxial anesthesia is associated with

The powersNeuraxial anesthesia neuraxial anesthesia is associated with an increased duration

an increased duration of the first and second stages

of labor, incidence of fetal malposition, use of oxytocin, and operative vaginal delivery

Слайд 47 The powers
Neuraxial anesthesia has not been proven to

The powersNeuraxial anesthesia has not been proven to increase the rate of cesarean delivery

increase the rate of cesarean delivery


Слайд 48 The powers
It is possible that changes in neuraxial

The powersIt is possible that changes in neuraxial technique or drugs

technique or drugs (eg, use of narcotics or low-dose

anesthetics) could decrease the incidence of dystocia

Слайд 49 The powers
The consequences of withdrawing the block before

The powersThe consequences of withdrawing the block before the second stage

the second stage of labor, appropriate use of oxytocin,

delayed pushing in the second stage, and timing of administration also need to be considered

Слайд 50 MANAGEMENT 
disciplined approach to the diagnosis of labor,

MANAGEMENT  disciplined approach to the diagnosis of labor, assessment of maternal

assessment of maternal and fetal well-being, and careful monitoring

of labor progress

Слайд 51 Advancement of cervical dilation charted on a partogram.

Advancement of cervical dilation charted on a partogram.

Слайд 52 MANAGEMENT 
Poor progression in the first stage
 Hypocontractile uterine

MANAGEMENT Poor progression in the first stage  Hypocontractile uterine activity is treated

activity is treated with oxytocin, which is the only

medication approved by the US Food and Drug Administration (FDA) for labor stimulation in the active phase

Слайд 53 MANAGEMENT 
Other — Other interventions, such as ambulation and continuous labor

MANAGEMENT Other — Other interventions, such as ambulation and continuous labor support, may increase

support, may increase the comfort of the parturient, but

have not been shown to be clinically effective interventions for treatment of protraction or arrest disorders

Слайд 54 MANAGEMENT 
Poor progression in the second stage
Three options:
Continued

MANAGEMENT Poor progression in the second stage Three options:Continued observation Attempt at

observation
Attempt at operative vaginal delivery
Cesarean delivery



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