maternal & neonatal withdrawal syndrome by: dr. f.goudarzi clinical toxicologist sums
TRANSCRIPT
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MATERNAL & NEONATAL WITHDRAWAL SYNDROME
BY:Dr. F.Goudarzi
Clinical ToxicologistSUMS
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TREATMENT OF THE PREGNANT WOMAN MEANS THAT ONE IS CARING FOR
TWO PATIENTS, NOT ONE
* IT IS SUGGESTED THAT PHYSICIANS ADDRESS THE ISSUE OF ALCOHOL AND DRUG USE DURING PREGNANCY WITH ALL
WOMEN OF CHILD BEARING AGE
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What is MNAS?
Presence of withdrawal behaviors in neonates exposed to dependency-producing substances in utero.
These behaviors include central nervous hypersensitivity, gastrointestinal dysfunction and vague autonomic symptoms.
25-40 % of infants with known exposure are asymptomatic or display only mild symptoms
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Substances that can cause MNAS Opiates- (55-94% of neonates exposed in
utero will have withdrawal symptoms) Alcohol Tobacco Benzodiazepines Barbiturates SSRIs (neonatal behavioral syndrome) ?Amphetamines ?Cocaine ?Marijuana TCA
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SEDATIVE/HYPNOTICS
BENZODIAZEPINE &PHENOBARBITAL WITHDRAWAL• NO DIFFERENCE BETWEEN PREGNANT AND NON-PREGNANT
WOMAN, ALTHOUGH SEVERE WITHDRAWAL CAN PRODUCE STATUS EPILEPTICUS AND FETAL RESPIRATORY ARREST
• CAN LAST 3 TO 5 WEEKS• VERY MUCH LIKE ACUTE ALCOHOL WITHDRAWAL• TIME COURSE AND SEVERITY DEPEND ON
• DOSE OF DRUG• DURATION OF USE (DOES NOT WORSEN AFTER ONE YEAR OF
USE)• DURATION OF DRUG ACTION
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FETAL EFFECTS FROM BARBITURATES
CLEFT PALATE HYPOSPADIAS (PENILE ORIFICE IS
TOO LOW) MICROCEPHALY (SMALL HEAD SIZE) SHORT NOSE
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FETAL EFFECTS FROM BENZODIAZEPINES
????CLEFT LIP AND PALATE
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OPIOIDS
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OPIOIDS WITHDRAWAL IN THE MOTHER –EARLY & MIDDLE PHASE
RESTLESS SLEEP DILATED PUPILS ANOREXIA GOOSEFLESH IRRITABILITY TREMOR
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OPIOIDS WITHDRAWAL IN THE MOTHER - LATE PHASE
INCREASE IN ALL PREVIOUS SIGNS AND SYMPTOMS INCREASE IN HEART RATE INCREASE IN BLOOD PRESSURE NAUSEA AND VOMITING DIARRHEA ABDOMINAL CRAMPS LABILE MOOD DEPRESSION MUSCLE SPASM WEAKNESS BONE PAIN
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OPIOIDS WITHDRAWAL
IT IS NOT RECOMMENDED TO TAPER PREGNANT WOMEN OFF OF METHADONE, BUT THE SAFEST TIME IS THE 2ND TRIMESTER (TIPS2)• BEFORE 14 WEEKS AND AFTER 32
WEEKS THERE IS AN INCREASED INCIDENCE OF SPONTANEOUS ABORTION AND PREMATURE LABOR
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OTHER WITHDRAWAL AGENTS CLONIDINE
• NO TERATOGENIC EFFECTS• LONG TERM USE NOT RECOMMENDED
BUPRENORPHINE• APPEARS SAFE WITH NO TERATOGENIC
EFFECTS, BUT NOT APPROVED FOR USE YET ( JONES AND JOHNSON 2001)
NEVER USE NARCAN UNLESS AS A LAST RESORT• SPONTANEOUS ABORTION• PREMATURE LABOR• STILLBIRTH
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FETAL EFFECTS OF OPIOIDS
LOW BIRTH WEIGHT FETAL DISTRESS PREMATURITY NEONATAL ABSTINENCE SYNDROME STILLBIRTH SUDDEN INFANT DEATH SYNDROME MECONIUM ASPIRATION
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NEONATAL ABSTINENCE SYNDROME
60-80% OF OPIOIDS EXPOSED INFANTS• 72 HOURS AFTER BIRTH
• CNS EFFECTS• IRRITABILITY• HYPERTONIA (INCREASED MUSCLE TONE)• HYPERREFLEXIA• ABNORMAL SUCK• POOR FEEDING• SEIZURES ( 1 TO 3%)
• GI EFFECTS• DIARRHEA • VOMITING
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METHADONE DOSING STRATEGIES IN THE PREGNANT WOMAN
INITIAL 10 TO 40 MG EXTRA 5 TO 10 MG IN 3 TO 4 HOURS IF
SIGNS AND SYMPTOMS OF WITHDRAWAL
REPEAT 5 TO 10 MG Q 3 TO 4 H PRN STABILIZE AT THIS DOSE FOR SEVERAL
DAYS DECREASE BY 2 .5 MG Q 7 TO 10 DAYS
AND MONITOR OB STATUS
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NEONATAL ABSTINENCE SYNDROME
MEDICATION DOSING
INDUCTION TITRATION STABILIZATION TAPERING
TINCTURE OF OPIUM 0.1 ML/KG (2 DROPS/KG) Q 4 H WITH FEEDINGS
INCREASE BY 0.1 ML/KG Q4H AS NEEDED
Q 4 H WITH FEEDINGS FOR 3 TO 5 DAYS
TAPER GRADUALLY BY REDUCING DOSE NOT FREQUENCY
PAREGORIC (0.4 MG/ML)
0.1 ML/KG ( 2 DROPS/KG) Q 4H WITH FEEDINGS
INCREASE BY 0.1 ML/KG Q 4H PRN
Q4H WITH FEEDINGS FOR 3 TO 5 DAYS
TAPER GRADUALLY BY REDUCING DOSE NOT FREQUENCY
METHADONE 0.05 TO 0.1 MG/KG Q 6H
INCREASE BY 0.05 MG/KG Q 6 H PRN
WHEN STABLE, GIVE TOTAL DAILY DOSE ONCE DAILY OR ½ BID
TAPER GRADUALLY TO 0.05 MG/KG, THEN D/C MED
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Diagnosis
Maternal history of drug use Positive identification of substance in
maternal or neonatal specimen Scoring
Once diagnosed- consult social services
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TIME TO ONSET OF MATERNAL WITHDRAWAL SIGNS
*MATERNAL WITHDRAWAL DEPENDS ON THE DRUG, FREQUENCY OF USE, AND DURATION OF USE. TIMES CAN VARY SIGNIFICANTLY.
DRUG TIME
ALCOHOL 6 to 60 HOURS
BARBITUATE 4 to 10 DAYS
DIAZEPAM 1 to 12 DAYS
OPIOID 12 to 72 HOURS
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TIME TO ONSET OF NEONATAL WITHDRAWAL SIGNS
USUALLY THE ONLY WITHDRAWAL SYNDROME THAT REQUIRES TREATMENT IS OPIOID WITHDRAWAL
DRUG TIME
ALCOHOL 3 to 12 HOURS
BARBITUATE 4 to 7 DAYS
DIAZEPAM 1 to 12 DAYS
OPIOID 48 to 72 HOURS
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Clinical Presentation
Onset of symptoms varies with the substance being used by the mother, the quantity, frequency and duration of intrauterine exposure, timing and amount of the last maternal use, as well as maternal and infant metabolism and excretion
CNS Tremors, irritability, increased
wakefulness, high-pitched crying, hypertonicity and hyperactive reflexes, seizures, yawning, sneezing and skin excoriation
Gastrointestinal• Poor feeding, uncoordinated
and constant suck, vomiting or regurgitation, diarrhea, dehydration
Autonomic Signs• increased sweating. Nasal
stuffiness. Rhinorrhea, mottling, temperature instability, fever, tearing
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W - wakefulnessW - wakefulnessI - irritabilityI - irritabilityT -tremors, twitching, tachypneaT -tremors, twitching, tachypneaH - hyperventilation, hypertonia, H - hyperventilation, hypertonia,
hyperpyrexia,hyperpyrexia, hyperaccusis, hiccupshyperaccusis, hiccupsD - diarrhea, diaphoresis, D - diarrhea, diaphoresis, R - rub marksR - rub marksA - alkalosisA - alkalosisW - weight lossW - weight lossA - apneaA - apneaL - lacrimation, L - lacrimation, S - seizures (myoclonic), sneezing, skin S - seizures (myoclonic), sneezing, skin
mottlingmottling
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Frequency of Clinical Signs
Disturbed sleep – 53% Mottling 53% Excess sucking 45% Tremors 43% Tachypnea – 43% Hypertonia 41% Fever 40% Seizures 2-11% (often later)
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STIMULANTS
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STIMULANTS
WITHDRAWAL IN THE MOTHER• DYSPHORIA• FATIGUE• UNPLEASANT DREAMS• INSOMNIA• HYPERSOMNIA (INCREASED SLEEP)• INCREASED APPETITE• PSYCHOMOTOR RETARDATION• AGITATION
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MATERNAL EFFECTS OF STIMULANT AND COCAINE
ABRUPTIO PLACENTAE PREMATURE LABOR SPONTANEOUS ABORTION DECREASE DURATION OF DELIVERY GREATER NUMBER OF OBSTETRICAL
COMPLICATIONS
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NAS
video clip
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ALCOHOL WITHDRAWAL
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MATERNAL WITHDRAWAL
THE RATE OF ALCOHOL METABOLISM MAY BE FASTER DURING PREGNANCY, SO BE AWARE THAT WITHDRAWAL CAN START SOONER THAN EXPECTED.
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MINOR WITHDRAWAL IN THE MOTHER
TIME• 6 to 60 HOURS
SYMPTOMS• TREMORS• INSOMNIA• NAUSEA• ANOREXIA• ANXIETY• WEAKNESS
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MINOR WITHDRAWAL IN THE MOTHER
SIGNS• ACTION TREMOR• INATTENTION• EASY STARTLE• PLETHORA• CONJUNCTIVAL INJECTION• INCREASED REFLEXES
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EARLY WITHDRAWAL IN THE MOTHER
TREATMENT• WATCH FOR DT’S• EVALUATE FOR OTHER ILLNESSES AND
INJURIES• LIGHT SEDATION WITH
BENZODIAZEPINES• THIAMINE• ELECTROLYTE BALANCE• PATIENTS MUST UNDERSTAND THAT
THEY NEED FURTHER TREATMENT
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LATE WITHDRAWAL IN THE MOTHER
DELIRIUM TREMENS• HIGH RISK FOR DT’S IF BLOOD ALCOHOL LEVEL GREATER THAN 300 mg%
OR WITHDRAWAL SEIZURES• PROFOUND CONFUSION AND MISPERCEPTIONS• DISORIENTATION• HALLUCINATIONS• PARANOID DELUSIONS• MOTOR HYPERACTIVITY
• TREMOR, RESTLESS, AGITATED, INCREASED REFLEXES• AUTONOMIC HYPERACTIVITY
• INCREASED HEART RATE, PROFUSE SWEATING, DILATED PUPILS
• MORTALITY OF THE MOTHER IS 10 to 15% IF UNTREATED, 1 to 2% IF TREATED
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FASD
BINGE DRINKING (5 OR MORE DRINKS ON ONE OCCASION) IS ESPECIALLY DETRIMENTAL TO THE FETUS
THERE IS NO PROVEN “SAFE” AMOUNT OF ALCOHOL TO USE DURING PREGNANCY• ALCOHOL HAS BEEN FOUND IN BREAST
MILK
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NICOTINE AND TOBACCO
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NICOTINE AND TOBACCO
IF THE PREGNANT WOMAN CANNOT STOP SMOKING USING BEHAVIORAL INTERVENTIONS, THEN NICOTINE REPLACEMENT PRODUCTS CAN BE USED
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NICOTINE WITHDRAWAL SYMPTOMS IN THE MOTHER
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
AnxietyIrritabilityPoor conc.RestlessCravingGI prob.HeadacheDrowsy
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CANNABINOIDS
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CANNABINOIDS
WITHDRAWAL IN THE MOTHER• 10 HOURS AFTER USE
• TREMOR OF THE TONGUE AND EXTREMITIES
• INSOMNIA• SWEATS• LATERAL GAZE NYSTAGMUS• EXAGGERATED DEEP TENDON REFLEXES
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MNASS
Used to initiate, adjust and wean pharmacologic
treatment. Scoring should begin within 4 hours after birth and
continue every 4 hours until the onset of symptoms. At the onset of symptoms scoring should be done every 3 hours for 24 hours and then every 4 hours for the duration of treatment.
Observation should be made after feedings, newborns must be awake and calm to asses muscle tone, respirations and Moro reflex. Newborns should be observed for 20 to 30 minutes before scoring is determined.
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Management
Supportive• Swaddling ( decreases the
added stimulation of startled movements)
• Reduction of environmental stimuli ( decreased light and noise)
• Frequent small feeding • Frequent diaper change are
necessary to reduce skin excoriation
• Monitor intake, output and weigh daily to assess hydration and caloric status related to vomiting, diarrhea and poor feeding status.
Pharmacologic intervention is indicated for evidence of acute withdrawal such as seizures, poor feeding (excess weight loss), severe diarrhea, vomiting, dehydration, inability to sleep and fever not due to any infectious etiology
• 3 consecutive NAS scores of 8 or more or the average of 3 consecutive NAS scores is 8 or more.
• or 2 consecutive NAS scores of 12 or more or the average of 2 consecutive score is 12 or more.
• Pediatric consult is recommended when considering pharmacologic treatment.
• Cardio respiratory monitoring.
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Pharmacologic Therapies in Neonatal Abstinence Syndrome
Paregoric • 0.2-0.5 ml/dose q 3-4 p.o. or 4-6
drops q 4-6h; may increase by 2 drops until clinical improvement
• Improves most of the withdrawal symptoms especially diarrhea, taper dose by 10-20% per day over 2-4 week after symptoms stable for 3-5 days.
Neonatal Opium Dilution 0.4% solution (contains 0.4 mg morphine equivalent per ml) guidelines:
• 0.8 ml/kg/day for NAS 8-10• 1.2 ml/kg/day for NAS 11-13• 1.6 ml/kg/day for NAS 14-16• 2.0 ml/kg/day for NAS >16• Doses given orally every 3-4 h
with feeds ( not prn)
Phenobarbital• 15-20 mg/kg/day loading dose
to achieve level of 20-40 mg/ml. Maintenance dose =2-8 mg/kg/day.
• Taper dose by 10-20% per day after symptoms stable for 3-5 days.
Diazepam• 0.3-0.5 mg/kg q 8 h; initial dose
i.m then p.o• Allows rapid suppression of
symptoms, decreased suck, avoid in jaundice or premature infants.
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Pharmacologic Therapies in Neonatal Abstinence Syndrome
Methadone• 0.1-0.5 mg/kg/day divided q
4 to 12 h• Increase by 0.05mg/kg/dose
until symptoms are well controlled
• Taper dose by 10-20% per day over 1 mo
• Treatment usually longer (5 days-4 mo)
• Long half-life (26 h )
Chlorpromazine• 0.5-0.7 mg/kg/dose loading
then 2-2.8 mg/kg/day in divided doses q 6 h
• Decrease dose over 2-3 wk
Clonidine• 0.5-1 ug/kg single dose
then 3-5 ug/kg/day divided dose q 4-6 h
• Increase by 0.5 ug/kg over 1-2 days until maintenance dose is achieved
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Weaning Guidelines
Once NAS are consistently 6-8, maintain the same therapeutic dose 48 hours before weaning. Wean by 10% of maximum dose every 1-2 days. If symptoms increase, return to effective dose. Therapeutic agents should be gradually decreased over a 2-6 week
period. Neonatal opium solution should be weaned first, then Phenobarbital.
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