To establish whether the addition of intrathecal tetanus antitoxin reduces the need for mechanical ventilation in patients with tetanus
The investigators will conduct a randomised partially-blinded controlled 2x2 factorial trial. First, adults admitted to the Intensive Care Unit at the Hospital for Tropical Diseases Ho Chi Minh City will be randomized to receive either human (3000 IU) or equine (21,000 units) intramuscular antitoxin. Second, participants will be randomized to receive either standard treatment with intramuscular antitoxin alone or with the addition of 500 IU intrathecal human antitoxin. Patients with prior antitoxin treatment and those with contra-indications to lumbar puncture or antitoxin treatment will be excluded. All patients will receive other standard tetanus treatment as deemed necessary by the attending physicians. Spasms will be treated with benzodiazepines as first-line therapy. Patients with spasms not controlled with benzodiazepines will receive tracheostomy, paralysis, magnesium sulphate and mechanical ventilation. Heart rate, BP, temperature and daily drug use will be recorded throughout the ICU stay. Patients will be followed following discharge from hospital until 240 days for disability/ death.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
272
Adults admitted to ICU at Hospital for Tropical Diseases will be randomized to receive either human (3000 IU) or equine (21,000 units) intramuscular antitoxin. Second, participants will be randomized to receive the addition of 500 IU intrathecal human antitoxin.
First, adults admitted to ICU at Hospital for Tropical Diseases will be randomized to receive either human (3000 IU) or equine (21,000 units) intramuscular antitoxin including a 0.05ml test dose (ie 75 units equine antitoxin or 12.5 IU human antitoxin). Second, participants will be randomized with sham procedure
Hospital for Tropical Diseases
Ho Chi Minh City, Vietnam
Requirement for mechanical ventilation during ICU stay
Criteria for mechanical ventilation are oxygen saturation (SpO2) \<90%; or partial pressure of oxygen/fraction of inspired oxygen (PaO2/FiO2) \<250; or excessive spasms necessitating muscle paralysis. These criteria are intended as a guide and the final decision to ventilate a patient rests with the individual doctor responsible for the patient.
Time frame: During ICU stay, an average of 3 weeks
Duration of ICU stay
Time frame: During ICU stay, an average of 3 weeks
Duration of hospital stay
Time frame: During hospital stay, an average of 5 weeks
Duration of mechanical ventilation
Time frame: During hospital stay, an average of 5 weeks
In hospital and 240 day mortality
Time frame: 240 days
In hospital and 240 day disability
Time frame: 240 days
New antibiotic prescription during ICU stay
New antibiotic prescription during ICU stay (excluding antibiotics for tetanus or initial entry site infection)
Time frame: During ICU stay, an average of 3 weeks
Incidence of Ventilator Associated Pneumonia
Definition of Ventilator associated pneumonia (VAP): Mechanical ventilation for at least 48 hours and with the tube in place within the last 48 hours and 2 of: * Temperature \> 38°C or \< 36°C * White blood cell count \<4.0 x 109/L or ≥12 x 109/L * Purulent respiratory secretions * New or progressive changes on chest radiography (for VAP) Plus for microbiologically confirmed VAP * Bacterial growth of ≥105 cfu/ml from endotracheal aspirate (ETA) (or ≥104 cfu/ml from Broncho Alveolar Lavage (BAL))
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Time frame: During hospital stay, an average of 5 weeks
Incidence of clinical syndrome of autonomic nervous system dysfunction
At least 3 of the following criteria: * Tachycardia Heart Rate (HR)\> 100 bpm * Hypertension Systolic Blood Pressure (SBP) \> 140 mmHg * Hypotension Mean Arterial Pressure (MAP) \< 60 mmHg * Pyrexia \> 38°C * Alteration between hypertension and hypotension
Time frame: 240 days
Total dose of benzodiazepines and pipecuronium during hospital stay
Time frame: During hospital stay, an average of 5 weeks
Incidence of adverse events
Time frame: During hospital stay, an average of 5 weeks