Pain and Symptom Management: Children with Severe...
Transcript of Pain and Symptom Management: Children with Severe...
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Pain and Symptom
Management: Children with
Severe Neurological
Impairment
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• Ruby Roy M.D. Program Director for JourneyCare All
About Kids Pediatric Palliative Care/Hospice
• Jennifer Misasi PNP, Pediatric Palliative Care/Hospice
and Pediatric Oncology
Presenters
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• Identify the symptoms of pain and discomfort in
children with SNI
• Recognize the importance of the parent history and
relationship with their child in identifying and treating
pain
• Describe the common etiologies of pain in children with
SNI
• Discuss both pharmaceutical and non-pharmaceutical
pain treatment modalities
Objectives
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• Children with severe physical and developmental
impairment
• Limitation in communication
• Wide range of diagnoses (although cerebral palsy, TBI,
HIE researched)
• Wide range of prognoses: but cannot be “cured” and
lifespan is limited
Severe Neurological Impairment
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• Pain in children with severe neurological impairment
is under -recognized, under-treated and negatively
affects quality of life
• Communication challenges and multiple pain etiologies
complicate diagnosis and treatment
• Most studies done in cerebral palsy population
Is Pain a Problem?
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• One time questionnaire, 252 respondents
• Over 55% of children had pain on a daily basis
• For 25% that pain was severe enough to affect
activities and impair mobility/function
(Penner et. al.Pediatrics Vol. 132 No. 2 August 1, 2013)
Pain in Children with Cerebral Palsy
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• A prospective study over a 4 week period with
moderate to severe cerebral palsy
– untreated pain “once or twice” in 44%
– untreated pain “fairly often” to “every/almost
every other day” in 21% of children
(Houlehan et.al. Dev Med Child Neuro 4 p305-10. 2004)
Frequency of Pain Symptoms
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• Pain occurred weekly in 44 % of children with
moderate to profound cognitive impairment
• Pain occurred almost daily in 41% of children with
greater impairment
(Breau et.al. Dev. Med. Child Neuro 46(6) p 364-71. 2004
Pain and Level of Impairment
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• Detailed history/physical/observation required.
• Children with SNI have behaviors that physicians may
not recognize as pain
• Parents often recognize symptoms but challenging to
verbalize it as pain or discomfort
• The pain behaviors often become a
behavioral/personality trait or “the way they are” and
dismissed by both parents and physicians
Recognition of Pain Symptoms
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• Uncontrollable bouts of crying in children with SNI in
the first year of life
• Sometimes pain is associated with another symptom
(constipation, formula) by parents
• Family may be so overwhelmed with all other medical
issues that this may get lost, or only brought up if
associated to a medical concern
Cerebral Palsy “Colic”
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• Baby ML is a 10 month old with history of chromosomal
abnormality, severe hypotonia and developmental
disability, congenital heart disease s/p repair, FTT,
feeding issues, and infantile spasms
• He was always “crabby” and hard to console. He was
hospitalized for several months, and was never
observed to smile.
Case 1
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• Audiology exam showed OME, parents became focused
on that as cause for pain (multiple ER/clinic/specialty
visits)
• Finally articulated chronic pain symptoms
• Started neuropathic pain medication
Case 1
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• Parents reported, smiling, laughing and much more
interactive
• Making some developmental gains in therapy
• Tolerating feeds better, weight gain, decreased seizures
Case 1
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• Was this acute pain? No.
– The acute issue brought to light the chronic pain
• Acute issues in children with SNI often reflect
increasing severity of chronic symptoms
• Once parents are taught to observe for pain behaviors,
they are often able to vocalize and advocate.
Case 1
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• Vocalization, crying, moaning
• Facial expression, grimacing
• Consolability (cerebral palsy “colic”)
• Interactivity: withdrawn, less active
Pain Behaviors In SNI
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• Movement: pulls legs up , restless
• Tone and posture: arching, stiffening
• Physiological responses: pale, sweating, tachycardia,
tachypnea, increased salivation/secretions
Pain Behaviors in SNI
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• Laughing with pain
• Withdrawal: lack of facial expression (if usually
animated), sudden loss of skills/milestones
• Increased aggression or self injurious behaviors.
Atypical antipsychotic vs. pain medication?
Idiosyncratic Pain Behaviors
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• Many parents worry about the difficulty of recognizing
their children’s pain
• When asked, they often say that they do not know
• Ask them to track troubling behaviors (arching, crying,
moaning, withdrawal, agitation)
Parents as Advocates
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• Nociceptive pain
• Neuropathic pain:
– Central pain
– Peripheral Neuropathic pain
– Autonomic instability (sympathetic storming)
– Visceral hyperalgesia
Types of Pain
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• Nociceptive pain –pain associated with tissue damage or
inflammation:
– GERD, constipation, pancreatitis, gallstones
– kidney stones, UTI
– fracture/dislocation
– Surgical pain
Sources of Pain
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• PLEASE REMEMBER
• When doing work up for nociceptive pain
(pancreatitis ) there is no
contraindication for treating the pain
• Patients with SNI get less pain medication
for nociceptive pain (injury/surgery) than
verbal patients
Nociceptive Pain
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• Changes in the nervous system that result in abnormal
transmission of pain signals. Often accompanied by
– Hyperalgesia: increased response to a painful
stimulus
– Allodynia: pain due to a stimulus that does not
usually cause pain (Sickle cell)
Neuropathic Pain
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• Diabetes, PVD, trigeminal neuralgia
• Phantom limb pain
• More than 20% of children with cerebral palsy will
exhibit peripheral neuropathic pain after orthopedic
surgical procedures (sciatica)
Peripheral Neuropathic Pain
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• Neuropathic pain resulting from impairment in the CNS
in the region of the spinothalamic tract
• Associated with hypoxic ischemic encephalopathy, post
stroke, brain trauma, also Rett syndrome
• In adults—degenerative brain disorders
Central Pain
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• Also called dysautonomia or autonomic or sympathetic
“storming”
• Altered heart rate, blood pressure, temperature,
flushing, sweating, retching, vomiting, increased
salivation
• Same vital sign changes as if pain
Autonomic Dysfunction
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• NC is a 4 year old with metachromatic leukodystrophy
• Has had progressive loss of function. No seizures. She is
very spastic and tight. Arches and cries with
movement/transfers.
• Started baclofen, diazepam and morphine with some
benefit
Case 2
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• Started gabapentin and after 2 months
– Was able to discontinue the morphine
– Mother reports she is much more comfortable, will
smile and respond positively to touch
– Is not crying constantly with transfers and movement
Case 2
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• After 6 months of comfort, was hospitalized for
pneumonia for 3 weeks
• After this admission mother prioritized comfort and
QOL over aggressive care
• Discharged on oxygen, and was again irritable, spastic
and arching, with some new autonomic storming
• Added methadone and morphine and was able to keep
her comfortable until EOL
Case 2
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• Bromocriptine (studies show best usage after acute
injury—TBI,HIE)
• Gabapentin
• Clonidine
• Beta blockers
• Benzodiazepines
• Morphine, methadone,
Treatment of Dysautonomia
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• Increased pain response to GERD and constipation,
despite medications for these (often accompanied by
retching/vomiting)
• Feeding intolerance
• Pain behaviors associated with “normal gut behaviors”
passing gas, tube feeding and bowel movements
Visceral Hyperalgesia
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• Central pain /visceral hyperalgesia/
– Step 1: Gabapentin /pregabalin +/- adjuvant
– Step 2: Clonidine or TCA +/- adjuvant
– Step 3: Methadone +/- adjuvant
Treatment of Neuropathic Pain
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• Mechanism: binds to alpha 2 delta subunit of voltage
dependent calcium channels in brain and spinal cord
• Weak Antiepileptic activity
• Minimal drug interactions, side effects sedation,
nystagmus
• Gabapentin (liquid, capsule) and pregabalin (Lyrica)
Gabapentinoids
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• May start as young as 2 month
• Start with low dose (2-3/Kg/dose) and titrate up to
20/kg/dose
• May take 2 month for maximal effect
• Max dose 2400-3600 mg/day or 50-70mg /kg/day
Gabapentin Dosing
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• Central acting alpha 2 adrenergic agonist
• Reduces sympathetic outflow
• Useful for dysautonomia and also possible anti
nociceptive effects
Clonidine
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• Comes in liquid, pill or patch
• Start with liquid or pill—transition to patch after oral
dose is determined.
• Cannot be stopped abruptly, needs to be weaned
Clonidine
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• Presynaptic reuptake inhibitors of
serotonin/norepinephrine in CNS, inhibits pain
transmission
• Nortryptiline has fewer drug-drug interactions than
amitriptyline
• ? Need for EKG, dependent on goals of care
Tricyclic Antidepressants
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• May be used in combination with gabapentin (adult
studies for neuropathic pain show greater benefit with
both medications)
• Data in press: about 2/3 of children with SNI show
benefit with Gabapentin alone, 1/3 will require second
medication (Hauer)
Nortryptiline
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• Mechanism: increase affinity of GABA for GABA receptor
• Treatment of intermittent muscle spasms (mostly
diazepam), anxiety and seizures
• Treatment of intermittent autonomic storms
Benzodiazepines
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• Lorazepam
• Diazepam
• Midazolam (short, amnesia, pre-op)
• Clonazepam (longest duration)
Benzodiazepines
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• Cyproheptadine—mechanism: serotonin 2, histamine 1
and muscarinic receptor blocker
• Used for retching- and associated vomiting, also
hypothermia and itching
Adjuvant to consider
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Most common cause for pain/discomfort in children with
severe neurological impairment.
• The enteric nervous system has been described as a
"second brain"
• The enteric nervous system can operate autonomously
• It normally communicates with the CNS through the
parasympathetic (vagal nerve) and the sympathetic
(prevertebral ganglia)
Gastrointestinal Symptoms
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• > 90% of kids with CP have GERD
-retching is not characteristic of GERD
• Medications vs. surgery
• Issues with repetitive surgery
• Continuous and J tube feeds
GERD
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• Aggressive treatment of constipation (please)
• Neither spasticity nor immobility is p.r.n., so
constipation cannot treated p.r.n
• May need both a softener and a stimulant
– MUSH and PUSH
Constipation
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• Untreated and undertreated constipation
– exacerbates GERD (increases respiratory secretions)
– can cause feeding intolerance
– have caused FTT/malnutrition
– Can also be a hallmark of neurological decline
Constipation in SNI
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• Long nociceptive differential for children with tube
feeding :
– GERD
– impaired gastric emptying,
– Complication of Nissen fundoplication
– Pancreatitis (think viral or drug induced)
– G-tube complication
– malrotation
– H. pylori
– untreated constipation
– Elevated ICP
Retching and vomiting
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• Consider that retching with or without vomiting can be
central (cyproheptadine)
• Consider visceral hyperalgesia
• Need a detailed history to differentiate VH from central
pain
Retching
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• Timing of pain behaviors and vomiting
• Characteristic of the vomiting (with retching or not)
• Cough association: before or after the emesis?
• Use therapists and nursing in-hospital
• Coach parents to look “with new eyes” so that they can
advocate for their children
History for Retching/vomiting
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• Treatment for GERD and constipation should always be
maximized first!
• Treatment for visceral hyperalgesia
– Gabapentinoid
– Benzodiazepines
– Clonidine
– nortryptiline
Pharmacologic Treatments
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• For intestinal symptoms
– Venting
– Farrell bag usage
– Modified timing of feeds
– Reduced rate of feedings
– Reduced amount of feedings (consistent with goals
of care)
Non Pharmacological Strategies
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• Comfort strategies: cuddling, rocking, massage,
repositioning
• Warm baths/aqua therapy, swaddling, music with
headphones, weighted blankets
• Vibratory stimulation-data to support this
– vibration mats and CPT vests
Non Pharmacological Treatments
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• Little data in our patient populations
• Experience is anecdotal
• Massage therapy and aromatherapy
• Be careful with herbal preparations
Integrative Therapies
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• Before considering a Nissen fundoplication (in a child
already gastrostomy tube fed)
• Before considering moving to continuous or J-tube
feeds
• For a child with SNI and “behavioral issues”
Consider an Empiric Trial of Neuropathic
Pain Treatment
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• All care for children with SNI is palliative care, by
definition
• Quality of Life is the priority
• Attention to symptoms, asking for pain history, will
improve QOL
Palliative Care
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• We ask our parents to take on multiple professional
roles in the care of their children: role of nurse,
respiratory therapist, diagnostician, advocate
• Children with SNI have limited interaction skills,
attending to pain improves them and can vastly
improving quality of life
• Improving child’s pain behaviors and interaction can
improve the parents quality of life
Role of the Caregivers
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A true friend knows your weaknesses but shows you
your strengths; feels your fears but fortifies your
faith; sees your anxieties but frees your spirit;
recognizes your disabilities but emphasizes your
possibilities – “
William Arthur Ward
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• Julie M. Hauer MD. 2013 Caring for Children with
Severe Neurological Impairment: A Life with Grace:
The Johns Hopkins University Press
• Hauer, J and Wolfe, J. Curr Opin Support Palliat Care
2014: 8
• Penner et. al.Pediatrics Vol. 132 No. 2 August 1, 2013
• Houlehan et.al. Dev Med Child Neuro 4 p305-10. 2004
• Breau et.al. Dev. Med. Child Neuro 46(6) p 364-71.
2004
References