Sickle-cell disease and vaso-occlusive crisis — Rapid

Synopsis

Understand sickling and childhood organ vulnerability, recognise painful crisis and rapidly lethal mimics or complications, deliver analgesia and supportive care in the correct order, and maintain infection prevention and specialist follow-up without undertreating pain.

Treat an acute painful sickle episode as a medical emergency and listen to the child and family as experts in the child's usual pattern and effective plan.
Use an age-appropriate pain score and give suitable analgesia within 30 minutes of hospital presentation; severe pain needs a strong-opioid bolus under the individual or local protocol.
Reassess pain and sedation every 30 minutes until satisfactory control, then at least every 4 hours; consider patient-controlled analgesia if repeated boluses are needed within 2 hours.
Record temperature, respiratory rate, pulse, blood pressure and oxygen saturation on air; give oxygen when saturation is 95% or below and investigate the cause.
Fever or an unwell child needs prompt cultures and IV antibiotics under the local sickle and sepsis pathway; prophylactic penicillin does not exclude invasive infection.
Do not transfuse an uncomplicated painful episode routinely; acute chest syndrome, stroke, sequestration and severe symptomatic anaemia require early haematology-led simple or exchange transfusion decisions.
Encourage oral fluids to normal requirement when able, use carefully calculated maintenance IV fluid if needed and avoid both dehydration and fluid overload.
Check for focal infection, chest disease, neurological change, splenic enlargement, priapism and a pain pattern that differs from previous crises at every assessment.
Long-term prevention includes antibiotic prophylaxis, routine and additional immunisation, education, an emergency plan and specialist consideration of hydroxycarbamide or transfusion programmes.
Pain behaviour and opioid need must be assessed without stigma; repeated presentations do not imply exaggeration or drug-seeking.

Key red flags

Temperature 38°C or above, rigors, hypothermia or toxic appearance may represent overwhelming bacterial infection despite prophylactic penicillin.

Chest pain, cough, fever, tachypnoea, increased work of breathing, falling oxygen saturation or a new pulmonary infiltrate suggests acute chest syndrome.

Weakness, facial asymmetry, speech or gait change, seizure, severe headache or altered consciousness is a sickle stroke emergency even if transient.

Rapid splenic enlargement with pallor, tachycardia, lethargy or hypotension suggests acute splenic sequestration and hypovolaemic anaemia.

Marked pallor and reticulocytopenia after viral symptoms suggests aplastic crisis; haemoglobin can fall profoundly without splenic enlargement.

Priapism lasting 2 hours, severe abdominal pain, bilious vomiting, focal bone tenderness or pain unlike the child's usual crisis needs urgent alternative-complication assessment.

Investigation priorities

First-line bedside observations and pain scoreFirst stepFirst line

Grade illness, detect hypoxia or sepsis and measure response to analgesia repeatedly.

Management branches

Painful crisisTreat pain promptly and reassess

Pain is compatible with vaso-occlusion and no immediate organ complication dominates.

Use the individual plan, score pain and give severity-appropriate analgesia within 30 minutes.
Add regular non-opioid analgesia when safe and reassess pain and sedation every 30 minutes.
Maintain normal hydration and warmth, support breathing and search repeatedly for an evolving complication.
Escalate to supervised patient-controlled analgesia if repeated strong-opioid boluses are required within 2 hours.

Key medicines

Strong opioid for severe vaso-occlusive painGive one age- and weight-appropriate strong-opioid bolus by a suitable route within 30 minutes using the child's individual care plan or locally agreed paediatric sickle protocol; reassess at 30 minutes and repeat if severe pain persists.Record pre-hospital doses, monitor respiratory rate, sedation and oxygenation, use local maximum and renal or hepatic adjustments, avoid pethidine, and prescribe regular laxative with as-needed antiemetic and antipruritic when opioid therapy continues.

Phenoxymethylpenicillin prophylaxisGive 62.5 mg orally twice daily up to age 1 year, 125 mg twice daily from 1 to under 5 years, and 250 mg twice daily from age 5 years onward, following the specialist plan.Confirm allergy phenotype and local alternative, reinforce that prophylaxis does not make fever safe, check adherence and supply of liquid formulation, and review duration with the haemoglobinopathy service rather than stopping independently.

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