poison in children
DESCRIPTION
for family medicine doctors, G pediatrician, medical studentsTRANSCRIPT
Evaluation and management of the poisoned child
Dr Hussein Abdeldayem, MDProfessor of Pediatrics. Alex Egypt
introduction• Circumstances of poisoning :
1-Commonly accidental especially in the under-5 age group .
2- homicidal. 3-suicidal (in older children)
mortality:Death is increasingly rare due to more effective management &preventive measures.
How Children Differ From Adults?
Developmental Considerations
(each age group is more vulnerable to specific
toxins)
Physical Considerations (there are many age-
related changes in vital signs).
Routes of administration of the poisons
Ingestion 79%Dermal 6.3%Ophthalmic 5.3%Inhalation 5.1%Bits and Stings 3.1%Parental 1%
Initial Assessment and
Management
Non specific. specific.
Kerosene. Caustic.
A-Non specific management:
1- removal of the source of poison away from the child .
2- initial resuscitation and stabilization.
3- removal of unabsorbed poison from GIT.
4-elimination of already absorbed poisons.
5-symptomatic and supportive measures.
1-removal of the poison .
Skin : triple wash ( water , soap , more water)
Eyes : saline wash.
Cavities : removed by irrigation.
2-Initial resuscitation and stabilization:
• it is the initial priority in treating poison children.
A:Assess airway patency.
B:Assess the adequacy of breathing .
C:Assess the circulation in terms of 1-cardiovascular status .2-effect of circulatory inadequacy to other organs
D:Assess neurological function in terms of:
-level of consciousness -pupillary size and reaction -bedside blood glucose concentration. -presence of any seizure
activity.
E:Record the child's temperature.
3-removal of unabsorbed poisons• from the GIT.1- Activated charcoal (AC):
it is the safest mode.
It is given if the child has taken a potentially toxic overdose within the previous hour.
• Mechanism and dose :
It adsorbs many toxins (except metals, alcohols & petroleum distillates) & reduces its absorbtion into the bloodstream.
Dose : 1 g/ kg.
Disadvantage: It is an odorless, tasteless, black powder so Children may be averse to its gritty texture & color.
if they cannot be cajoled with flavoring, an opaque cup, and straw, then it can be administered by a nasogastric tube.
2- Gastric lavage :
usually reserved for children who present within 1 h of ingesting a potentially life-threatening poison.
disadvantage: It is often difficult to remove the toxic agent from the GI tract because of the small size of lavage tube needed in pediatric patients.the child will often need to be intubated to facilitate this technique.
alkalis hydrocarbons acids
contraindicated
3- Whole-bowel irrigation:
Irrigation is a newer technique used to flush the toxin through the bowel , thereby preventing further absorption.
Polyethylene glycol 500 ml /h is given orally & continued until the rectal effluent is clear (in 4-6 h).
serial abdominal radiographs may also be used to demonstrate its effectiveness.
It is particularly useful for ingestions that are not adsorbed by AC such as:
Lead paint
batteriesiron tablets
Symptomatic Rx
hypotension
arrhythmia
convulsions
Pain
hypothermia
5-elimination of the already absorbed poisons.Absorption of poisons occurs after six hours after ingestion.The techniques are :
forced diuresis. peritoneal dialysis hemodialysis.
hemoperfusion. hemofiltration. plasmapheresis.
exchange transfusion.
KEROSENE POISONING
Kerosene poisoning is common in communities where kerosene is a major household fuel.
The circumstance is usually accidental ingestion (mistaken for water)
Management
Investigations Treatment
Investigationsto aid management and to monitor complications in other organ systems we do:
full blood count electrolytes
Urea& creatinine
level
liver function test
Chest x-ray is done in all symptomatic patient to :
1-determine the extent of injury . 2-rule out differentials which include -atelectasis -inhalation injury -Near Drowning -Pneumonia -Respiratory Distress syndrome
Perihilar opacity Bi-basal infiltration
Initially the chest radiograph may be normal but positive findings develop over the first few hours after ingestion of kerosene. Common findings include perihilar opacities and bi-basal infilteration.
Treatment:
maintenance of airway, breathing and circulation.
Stabilization of the airway is always the first priority of treatment.
Gastric lavage and induction of emesis ( e.g. use of Ipecac) should not be
considered in the management of kerosene poisoning as these may cause further aspiration and worsens the condition.
CorrosivesSubstances that cause tissue damage by chemical reaction
Inorganic non metal :–Acids as sulfuric acid and hydrochloric acid.–Bases (alkali)as ammonia, k permenganate .
Organic non metal: - Carbolic acid and oxalic acid.
Classification of corrosives:
• PH of saliva should be checked by PH paper.• Endoscopy is the only reliable way to establish the
severity of esophageal burn. It should be performed from 12- 24 hours after ingestion. (contraindicated if there is suspecting perforation)
Investigations
Routine investigation :Complete blood count, glucose and electrolyte determination level.
Chest and abdominal X-ray should be taken to rule out visceral perforation.
Ocular slit- lamp examination with topical fluorescein dye in cornel burns.
Treatment
No Gastric lavage
No Emesis
Not give activated charcoal
No bicarbonate or antidote
Assess the A –B- C
Give water (diluting) only 60 ml
Demulcent as cold milk
Analgesics and antibiotics
corticosteroids