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Paediatric guidelines for the management of severe Traumatic Brain Injury in children

Created: 22/5/2007
 

Paediatric Guidelines for the Management of Severe Traumatic Brain Injury

Dr Peter Wilson
Director PICU, Lead PICU Retrieval Service, Southampton General Hospital

Introduction

Severe traumatic brain injury is classified as a Glasgow Coma Scale (GCS) <9. 
One million patients a year in the UK present to hospitals with head injuries, almost 50% are less than 16 years old. Severe traumatic brain injuries (TBI) are a common cause of death in children in the UK, accounting for 15% of deaths in 1-15 year olds and 25% of deaths in 5-15 year olds. The most common cause is a road traffic accident, followed by falls. Road traffic accidents (RTAs) account for most of the serious injuries, and 58% of all TBI deaths. In infancy, non-accidental injuries remain an important cause.
Many of these patients are left with significant behavioural, cognitive, emotional and physical damage.
The aims of management are to prevent secondary damage/injury by the prevention of hypoxia, hypotension and raised ICP.
It is essential that this be done prior to the transfer of the patient as this improves morbidity and mortality.
The only time that a traumatic brain injured patient requires rapid transfer to a neurosurgical centre is when a mass lesion is present. This requires evacuation within 4-6 hours to prevent secondary hypoxic damage.

General Rules

  1. All children with a GCS <9 must be intubated and ventilated and a CT scan performed
  2. If a child has a GCS <9 and the plan is to keep sedated and ventilated, then an intracranial bolt MUST be inserted
  3. If a generalised tonic clonic seizure is thought to be the cause of the low GCS AND the CT scan is normal, these patients can be “woken up” at the referring hospital
  4. Adequate cerebral perfusion pressures, and adequate oxygenation, are the best modifiers of outcome in TBI
  5. Life-threatening injuries take precedence over neuroprotection
  6. End-tidal PaCO2 monitoring is essential for managing and transporting a patient with a traumatic brain injury
  7. All requests for intensive care treatment should come through the PICU. The PICU consultants will liaise with the neurosurgical registrar
  8. Space-occupying lesions and blocked ventriculo-peritoneal shunts are a neurosurgical emergency and should be transferred immediately by the referring hospital team (see appendix 4)
  9. The lack of a CT scanner is a neurosurgical emergency and should mandate immediate transferral by the referring hospital team (see appendix 4).

Retrieval Process


1. At Referral Call

1.1 Ascertain mechanism and severity of injury 
    a. Speed 
    b. Deaths 
    c. Mechanism of injury 
    d. Thrown from vehicle 
    e. GCS at scene 
    f. Need for resuscitation at scene

1.2 Ascertain clinical state of patient. 
    a. Level of consciousness 
    b. Pupillary response 
    c. Abnormal posturing 
    d. Signs of base of skull fracture 

1.3 Ascertain whether there are any other life-threatening injuries.
1.4 Ensure patient is intubated and ventilated (indications in appendix 1).
1.5 Ensure adequate resuscitation (see protocol).
1.6 Ensure spinal protection (see protocol).
1.7 Ensure adequate neuroprotection (see protocol).
1.8 Ensure no evidence of raised intracranial pressure - if there is, treat as an emergency (see protocol).

1.9 Ensure child is on the way for a CT scan (indications in appendix 2).
1.10 Request CT scan of C-spine if possible.
1.11 Determine whether there is a neurosurgical emergency. If there is, request that the referring team brings the patient (see appendix 3 and 4).
1.12 Ensure blood tests, including X-match and clotting, are performed urgently.
1.13 Request referring team contacts neurosurgeons if not already done.

2. Pre-departure

2.1 Ensure neurosurgeon aware of patient.
2.2 Request they speak to referring team and view the CT scan via image-link.
2.3 Request referring hospital radiologist review CT scan.
2.4 Request referring hospital create CD of CT scan for transferral.
2.5 Ensure NO expanding mass lesion. If there is, referring hospital should bring the patient immediately (see appendix 4).

3. At Referring Hospital

3.1 Ensure adequate resuscitation (see protocol).
3.2 Ensure adequate spinal protection (see protocol).
3.3 Ensure adequate neuroprotection (see protocol).
3.4 Ensure no evidence of raised intracranial pressure (see protocol).
3.5 Ensure no life-threatening injuries.
3.6 If cardiovascularly unstable and requiring >40 ml/kg of fluid resuscitation, consider sites of blood loss: abdomen, pelvis, long bone fractures, chest and head (especially in infants).
3.7 DO NOT leave the referring hospital until ALL life-threatening injuries have been attended to. This may mean going to theatre at the referring hospital.
3.8 Ensure adequately monitored (see protocol).

4. Prior to Departing Referring Hospital

4.1 Ensure you have all trauma series X-rays.
4.2 Ensure you have a copy of the CT scan on CD plus a hard copy if possible.
4.3 Arterial blood gas prior to departure is essential to correlate PaCO2 with end-tidal PaCO2.
4.4 Catheterise patient.
4.5 Ensure you have blood results (especially clotting), and X-matched blood if necessary.
4.6 Ensure minimum patient monitoring:    a. ECG 
                                                              b. end-tidal PaCO2 
                                                              c. Invasive arterial monitoring

Protocol

1. Intubation

1.1 All patients with a GCS <9 (see appendix 5) MUST be intubated.
1.2 Spinal immobilisation before, during and after intubation is essential.
1.3 Thiopentone is the induction agent of choice. Beware large doses of induction agent in under-resuscitated children, as they may become profoundly hypotensive. Use the minimum dose required to induce anaesthesia.
1.4 Suxamethonium is used if a rapid sequence induction is thought essential.

2. Spinal Protection

2.1 All patients with severe traumatic brain injury should have in-line stabilisation of their cervical spine, with removal of the collar, during intubation.
2.2 Intubation of patients requires a minimum of two people to manage the airway.
2.3 Once intubated, all patients must be kept sedated and muscle relaxed.
2.4 A hard collar, blocks and tape are essential to ensure the cervical spine is immobilised.
2.5 All patients should be log rolled to protect the thoracic and lumbar spine.
2.6 All patients should be transferred on a vacumatress.

3. Ventilation

3.1 All patients should be adequately sedated and muscle-relaxed.
3.2 Patients should be ventilated to maintain a PaCO2 of 4.5 kPa.
3.3 All patients must have end tidal PaCO2 monitoring.
3.4 Maintain a PaO2 above 13 kPa or saturations ≥96%.
3.5 It is essential to ventilate all patients with PEEP to prevent atelectasis and hypoxia.

4. Circulation

4.1 Treat hypotension aggressively. Hypotension is the biggest cause of secondary ischaemic injury.
4.2 It is essential to keep the systolic blood pressure above the 95th centile for age (see appendix 6).
4.3 Every patient should have a minimum of two large-bore peripheral cannulae or a central line. Avoid internal jugular lines.
4.4 All patients should have invasive blood pressure monitoring.
4.5 All patients must be catheterised.
4.6 After a maximum of 40 ml/kg resuscitation fluid, packed cells should be used for further fluid resuscitation.
4.7 If cardiovascularly unstable despite fluid resuscitation, it is vital to consider other sites of bleeding, especially femur, abdomen, chest, pelvis, and in infants, the scalp.
4.8 If there is ongoing bleeding, the patient should not be transferred until the bleeding has been controlled. This might necessitate the patient going to theatre in the referring hospital.
4.9 The mean arterial pressure should be targeted to maintain a theoretical cerebral perfusion pressure over 60 mmHg, or over 40 mmHg in infants.
4.10 Noradrenaline should be used unless there is evidence of myocardial dysfunction, in which case an inotrope should used in addition.

5. Neuroprotection

5.1 Ensure head in mid-line position
5.2 Ensure the bed/trolley is tilted to 30 degrees head up.
5.3 Ensure adequately sedated (often require large amounts of morphine and midazolam) and muscle-relaxed.
5.4 Maintain well oxygenated.
5.5 Maintain PaCO2 at 4.5 kPa.
5.6 Maintain cerebral perfusion pressure greater than 60 mmHg.
5.7 An intracranial pressure bolt is essential for measuring pressure. During transfer, assume ICP is 20 mmHg until ICP bolt inserted on the PICU.
5.8 Use noradrenaline to maintain CPP in an adequately resuscitated patient with no evidence of myocardial dysfunction.
5.9 Load with phenytoin.
5.10 Keep sodium >135 mmol/L. If less than 135 mmol/L, use 1-2 ml/kg boluses of 3% saline (see appendix 7).
5.11 Maintain glucose in the normal range.
5.12 Maintenance fluids should be given at 2/3 maintenance.
5.13 If the patient is >10 kg, use isotonic saline. If <10 kg, use isotonic saline with 10% dextrose.
5.14 Maintain normothermia. Actively treat hyperpyrexia.

6. Management of raised intracranial pressure

6.1 This should only be undertaken if evidence of Cushing’s triad (bradycardia, hypertension, fixed and dilated pupil) on transfer.
These procedures should not be performed for evidence of cerebral oedema on CT scan.
6.2 Remove patient from ventilator and hyperventilate.
6.3 Increase noradrenaline to increase cerebral perfusion pressure.
6.4 Give mannitol 0.25 g/kg over 20 minutes (see appendix 8).
This can be repeated once.
6.5 Ensure haemoglobin, glucose, pCO2 are within normal limits.
6.6 Ring the PICU and inform neurosurgeon of deterioration.
6.7 If there is an expanding mass lesion, discuss with neurosurgeon about proceeding directly to neurosurgery.

7. Other Management

7.1 All patients should have a secondary survey performed by a surgeon or emergency department physician.
7.2 All patients should have a complete trauma series done in X-ray.
7.3 If an abdominal injury is suspected, either an ultrasound or CT scan of the abdomen should be performed.
7.4 A CT scan of the head is compulsory and a CT scan of the C-spine is recommended.


Appendix 1

Indications for intubation in traumatic brain injury

1. GCS <9
2. Loss of airway reflexes
3. Ventilatory insufficiency (PaO2 <9 in air or <13 in oxygen, or a PaCO2 >6)
4. Severe facial injuries (La Forte fracture, mandibular fracture)
5. Seizures


Appendix 2

Indications for CT scan in traumatic brain injury

1. GCS <13 at any time since injury
2. GCS = 13-14 2 hours post-injury
3. Suspected open or base of skull fracture
4. Post-traumatic seizure
5. Focal neurological deficit
6. Dangerous mechanism of injury


Appendix 3

Indications for emergency transfer by referring team

1. Extradural
2. Expanding mass/bleed/ blocked shunt
3. Penetrating injury
4. Compound fracture
5. Uncontrollable bleeding from skull base


Appendix 4 


Referral procedure for Paediatric Severe Traumatic Brain Injury


Appendix 5


Paediatric Glasgow Coma Score

Best Eye Response (4)
1. No eye opening
2. Eye opening to pain
3. Eye opening to verbal command
4. Eyes open spontaneously

Best Verbal Response (5)
1. No vocal response
2. Inconsolable, agitated
3. Inconsistently consolable, moaning
4. Cries but is consolable, inappropriate interactions
5. Smiles, oriented to sounds, follows objects, interacts
 
Best Motor Response (6)
1. No motor response
2. Extension to pain
3. Flexion to pain
4. Withdrawal from pain
5. Localising pain
6. Obeys Commands




Appendix 6


Systolic Blood Pressure 95th centile by age

0 days to 1 wk >65
1 wk to 1 mo >75
1 mo to 1 yr >100
2 to 5 yrs >94
6 to 12 yrs >105
13 to 18 yrs >117



Appendix 7


3% Saline

Use 1-2 ml/kg boluses of 3% saline

To prepare 50 ml 3% saline: Take 5 ml 30% sodium chloride and dilute with 45 ml of water for injection

To prepare 500 ml 3% saline: Take a 500 ml bag of 0.9% NaCl. Remove 36 ml.
Add 36 ml 30% NaCl.



Appendix 8

Mannitol Table

Use 0.25-0.5 g/kg boluses of mannitol

10% Mannitol: 0.25-0.5 g/kg = 2.5-5 ml/kg

20% Mannitol: 0.25-0.5 g/kg= 1.25-2.5 ml/kg



ArticleDate:20070522
SiteSection: Article
 
   
    
                                            
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