Cord Prolapse

DR. KATTEY KATTEY A.

MBBS (UPH), MPH(JHU)

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OUTLINEIntroduction

Definition

Types

Incidence and Epidemiology

Risk Factors

Diagnosis

Management

Community Setting

Prevention

Counseling

Conclusion

2KATTEY K.A (MBBS, MPH)

INTRODUCTION

• Cord prolapse is one of the many causes of fresh stillbirth.

• It is one of the obstetric emergencies seen in maternity units in obstetrics and timely delivery is the hallmark of good clinical management.

• In many developing countries like ours, mobilizing the theatre for emergency CS may pose a challenge and patients with cord prolapse with partially dilated cervix may have to travel long distances before reaching a hospital equipped for CS. This usually results in fetal deaths.

3KATTEY K.A (MBBS, MPH)

CORD PROLAPSE

• Defined as descent of the umbilical cord into the loweruterine segment where it may lie adjacent to the presentingpart or below the presenting part, without intact fetalmembranes.

• When the membranes are intact, it is called CORDPRESENTATION.

4KATTEY K.A (MBBS, MPH)

TYPES

• Occult cord prolapse• Cord is adjacent to the presenting part• Cannot be palpated during pelvic examination.• Might lead to variable decelerations or unexplained fetal distress.

• Funic (cord) presentation• Prolapse of the umbilical cord below the level of the presenting part before the

rupture of fetal membranes• Cord can often be easily palpated through the membranes• Often the harbinger of cord prolapse

• Overt cord prolapse• Umbilical cord lies below the presenting part• Associated with rupture of membranes, and displacement of the cord through the

vagina.

5KATTEY K.A (MBBS, MPH)

Other Types of Cord Accidents• True Cord Knots

An intertwining of a segment of umbilical cord,

Circulation is usually not obstructed,

commonly formed by the fetus slipping through a loop of the cord.

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Nuchal Cord

• The umbilical cord is wrapped around the neck of the fetus in utero or of the baby as it is being born.

• It is usually possible to slip the loop or loops of cord gently over the child's head.

• The condition occurs in more than

25% of deliveries, more often with

long cords than with short

ones.

7KATTEY K.A (MBBS, MPH)

INCIDENCE AND EPIDEMIOLOGY• The incidence of occult cord prolapse is unknown because it can be

detected only by fetal heart rate changes characteristic of umbilical cord compression.

• Overall Incidence of overt cord prolapse is between 0.1% to 0.6%1

• 0.5% in cephalic presentation• 0.5% frank breech• complete breech 5%• footling breech 15%, and • transverse lie 20%

1Royal College of Obstetricians and Gynaecologists (RCOG). Umbilical cord prolapse. Green-top Guideline No. 50. April 2008

8KATTEY K.A (MBBS, MPH)

INCIDENCE AND EPIDEMIOLOGY (Cont’d)• Incidence of 0.2% (34/16633) over a 12 ½ year period at the ABUTH,

Kaduna State.2

• BMSH over a 12 month period (June 1, 2012- May 30, 2013):

28/2846 = 0.98%3 or 9.8 per 1,000 child births.

2 Onwuhafua et.al, Umbilical Cord Prolapse in Kaduna. Niger J Clin Pract, 2008

3 Source: BMSH Labour Ward Register, 2012/2013.

9KATTEY K.A (MBBS, MPH)

Aetiology/ Risk Factors

• The common denominator is incomplete fitting of the presenting part into the maternal pelvis at the time of rupture of membranes.

• Factors are interrelated.

• Can be SPONTANEOUS OR IATROGENIC.

• SPONTANEOUS factors are fetal, placental and maternal.

• IATROGENIC factors are procedure-related.

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Aetiology/ Risk Factors

FETAL FACTORS

• Prematurity & IUGR

• Abnormal lies

• Malpresentation

• Fetal anomaly

• Multiple pregnancy

11KATTEY K.A (MBBS, MPH)

Aetiology/ Risk FactorsMATERNAL

• Rupture of membranes • Spontaneous (including preterm ROM)• Amniotomy (ARM)

• Pelvic tumors e.g cervical fibroid

• Pelvic contraction

• Preterm labour

PLACENTAL

• Polyhydramnios

• Minor degree of placenta previa

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Aetiology/ Risk Factors

• Some authorities have also speculated that Cordabnormalities (such as true knots or low content ofWharton’s jelly) and Fetal hypoxia-acidosis may alterthe turgidity of the cord and predispose to prolapse.

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Aetiology/ Risk Factors

PROCEDURE- RELATED

• Amniotomy

• External Cephalic Version

• Internal Podalic Version

• Stabilizing Induction of labor

• Applying fetal scalp electrode

• Amnion infusion

• Placement of a cervical ripening balloon catheter

14KATTEY K.A (MBBS, MPH)

Consequences

• Cord compression Umbilical artery vasospasm

Birth asphyxia

Hypoxic-Ischemic Perinatal death

Encephalopathy

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DIAGNOSIS

• Cord presentation and prolapse may occur without outward physical

signs.

• Suspected during clinical examinations

• abnormal fetal heart rate pattern may suggest overt or occult cord prolapse

• (bradycardia, marked variable decelerations etc)

• in the presence of ruptured membranes, particularly if such changes occur soon aftermembrane rupture, spontaneously or with amniotomy

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Confirmed by VAGINAL EXAMINATION

• Sudden appearance of a loop of umbilical cord at the introitus, usually just after membrane rupture

• May palpate cord during a vaginal examination in the absence of intact membranes

• Cord presentation, sometimes felt below the presenting part when membranes are intact.

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Diagnosis (Cont’d)

Cord (Funic) Presentation can also be diagnosed with USS before the onset or during early labour.

• However, note that USS is not sufficiently sensitive or specific for identification of cord presentation ante-natally and should not be performed routinely to predict cord prolapse.

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MANAGEMENT

The various modalities of management aim at raising the pelvis, and therefore bring the cervix to a higher level than the fundus of the uterus.

• Depends on the type of cord prolapse.

OCCULT PROLAPSE

Immediate VE to rule out cord prolapse

Left lateral position

O2 to mother

Discontinue oxytocin infusion if in place

Allow labor to progress if FH returns to normal and no further insult.

Continuous fetal heart rate monitoring

Amnioinfusion

CS if cord compression pattern continues

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MANAGEMENT

CORD PRESENTATION

• Term: CS prior to membrane rupture.

• Premature: No consensus on management• Hospitalize px on bed rest in Sim’s position or Tredelenburg position

• Serial USS to ascertain cord position, presentation and GA

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MANAGEMENT OF OVERT CORD PROLAPSE

Speed is of the essence and perinatal outcome is largely dictated by the diagnosis-delivery interval.

The three components of management are:

1. Prevent or relieve cord compression and vasospasm

2. Fetal assessment

3. Prompt delivery of the infant

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1. Prevent/relieve cord compression and vasospasm• Manual replacement

• Manual elevation• Funic reductionN/B: There should be minimal handling of loops ofcord lying outside the vagina

• cover in surgical packs soaked in warm saline. • Rough handling of the cord, and colder temperature outside the vagina can

lead to vasospasm.• Gently replace in the vagina if outside the vagina

• Bladder filling• Adjust maternal position

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Bladder filling

• If the decision-to-delivery interval is likely to be prolonged,elevation through bladder filling may be more practical.

• Introduced by Vago4 in 1970

• It is essential to empty the bladder again just before any deliveryattempt, be it vaginal or CS.

• Physiologically inhibits uterine contraction. There may becontractions but not strong enough for the presenting part toeffectively compress the cord.• Tocolytics can also be used to achieve this (Katz et al., 1982)

4 Vago, T. Prolapse of the umbilical cord: a method of management.Am J. Obstet Gynecol,1970.

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Maternal Position Adjustment• Knee-chest position (Genu-pectoral)

• Gives maximum elevation of the presenting part.

• Provides good initial evaluation of the presenting part.

• A tiring posture to maintain.

• If any length of time is involved, move to the Sim’slateral position

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• Sim’s lateral position• More relaxed and dignified for the patient.

• Elevate buttocks with pillow

• Tredelenburg position• A head-down tilt.

• Very tiring

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2. FETAL ASSESSMENT

IS THE BABY VIABLE?

Interventions for fetal reasons are not necessary for:

• Already dead baby

• Too immature to survive (e.g. before age of fetal viability)

• Lethal fetal anomaly (e.g. anencephaly)

• In these cases, allow labour to progress and deliver vaginally unless there’s a contraindication to vaginal delivery.

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2. FETAL ASSESSMENT

IF BABY IS ALIVE

• Quickest way to tell is by palpating the presence or absence of pulsations in the cord.

• Beware of mistaking folds of membranes or tips of fetal fingers and toes for the cord. Or clinician’s finger pulsation.

• Absent pulsations should be confirmed between contractions in case cord compression is released and pulsations return.

• Fetal heart auscultation best determines whether or not the fetus is alive. Electronic fetal heart monitoring using fetal scalp electrode may be useful.

• Real-time USS if available.

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3. PROMPT DELIVERY

CERVIX FULLY DILATED

• Vaginal birth can be attempted at full dilatation if it is anticipated that delivery would be accomplished within 20 minutes from diagnosis.

• Depending on the circumstances, this may involve delivery by forceps, vacuum or breech extraction.• Breech extraction e.g after IPV for 2nd twin, or for singleton breech babies

with presenting part distending the perineum

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3. PROMPT DELIVERY

CERVIX NOT FULLY DILATED

• An immediate Caesarean Section (usually within 30 minutes) is the recommended mode of delivery in cases of cord prolapse when vaginal delivery is not imminent, in order to prevent hypoxia-acidosis.

• The 30-minute decision-to-delivery interval (DDI) is the target for CS. • Some investigators have noted that the interval to delivery had little effect on

Apgar scores if they delivered within 30 minutes.

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3. PROMPT DELIVERY

• The presenting part should be kept elevated during induction of anaesthesia and

placement of sterile sheets.

• Remember to drain bladder before incision.

• Recheck fetal heart before incision.

• Regional anaesthesia may be considered in consultation with an experienced anaesthetist

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3. PROMPT DELIVERY

• A practitioner competent in the resuscitation of the newborn, usually

a neonatologist, should attend all deliveries with cord prolapse.

• Neonates born after cord prolapse are at significant risk of needing

neonatal resuscitation, as evidenced by a high rate of low APGAR

scores (<7)

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MANAGEMENT IN COMMUNITY SETTING

There’s an increase in perinatal mortality in cases of cord prolapse occurring outside the hospital, even compared with an unmonitored fetus whose cord prolapsed while in the hospital.

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MANAGEMENT IN COMMUNITY SETTING

• Women should be advised, over the telephone if necessary, to

assume the knee-chest or steep Trendelenburg position while

waiting for hospital transfer.

• During emergency ambulance transfer, the knee–chest is

potentially unsafe and the left-lateral position should be used.

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• All women with cord prolapse should be advised to be transferred to the nearest

consultant unit for delivery, unless an immediate vaginal examination by a

competent professional reveals that a spontaneous vaginal delivery is imminent.

• Preparations for transfer should still be made.

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• The presenting part should be elevated during transfer by either

manual or bladder filling methods.

• It is recommended that community midwives carry a Foley catheter

for this purpose and equipment for fluid infusion.

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PREVENTION

• Women with transverse, oblique or unstable lie should be offered elective

admission to hospital at 37 weeks of gestation, or sooner if there are signs of

labour or suspicion of ruptured membranes.

• Women with non-cephalic presentations and preterm pre-labour rupture of the

membranes should be offered admission.

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PREVENTION (Cont’d)

• In-patient care will minimise delay in diagnosis and management of

cord prolapse.

• Labour or ruptured membranes of an abnormal lie is an indication for

caesarean section.

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PREVENTION (Cont’d)

• Bradycardia or variable fetal heart rate decelerations have been

associated with cord prolapse and their presence should prompt

vaginal examination.

• Mismanagement of abnormal fetal heart rate patterns is the

commonest feature of substandard care identified in perinatal death

associated with cord prolapse

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PREVENTION (Cont’d)

• Speculum and/or a digital vaginal examination should be performed when cord

prolapse is suspected, regardless of gestation.

• Prompt vaginal examination is the most important aspect of

diagnosis.

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PREVENTION (Cont’d)

• Artificial rupture of membranes should be avoided whenever possible

if the presenting part is unengaged and mobile.

• If it becomes necessary to rupture the membranes in such

circumstances, this should be performed in theatre with capability for

immediate caesarean birth.

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PREVENTION (Cont’d)

• Vaginal examination and obstetric interventions in the context of ruptured

membranes carry a risk of upwards displacement of the presenting part and cord

prolapse.

• Rupture of membranes should be avoided if on vaginal examination the cord is

felt below the presenting part in labour (Cord presentation). A caesarean section

should be performed.

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COUNSELLING

• Postnatal debriefing should be offered to every woman with cord

prolapse.

• After severe obstetric emergencies, women might be psychologically

affected with postnatal depression, post-traumatic stress disorder, or

fear of further childbirth.

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COUNSELLING

• Women with cord prolapse who undergo urgent transfers to hospital

are possibly particularly vulnerable to psychological trauma.

• Debriefing is an important part of maternity care and should be

offered by a suitably trained professional.

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CONCLUSION

Cord prolapse is a frightening and life-threatening event that

occurs in labour. Rapid identification and immediate

appropriate response may well save the life of a neonate.

Therefore, clinicians should be knowledgeable in its

recognition and management.

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