Today our topic of discussion is High Frequency Ventilation.
High Frequency Ventilation
High Frequency Ventilation
High frequency ventilation refers to any form of mechanical ventilation that functions at a frequency of at least four times the normal respiratory rate. It provides small tidal volumes and less peak inspiratory pressure. To compensate for this, rate is increased.
High Frequency Positive Pressure Ventilation
It is positive pressure ventilation delivered at a rate of 60-100 breaths per minute with tidal volume of 3-5 mL/kg through a system that does not involve gas entrapment.
Indications
- Patients with pulmonary air link .
- Pneumomediastinum.
- Respiratory failure or ARDS.
- High frequency Jet ventilation consists of intermittent delivery of high pressure gas about 140-2800 cm of 420 through a small bore injector cannula placed in the proximal end of endotracheal tube.
- Suction tubing and catheter to be transparent so that.
- Ensure that vacuum pressure is not more than 120 mm Hg in adult and 100 mm Hg in children.
- Endotracheal tube to be rotated daily, to prevent pressure ulcer on patient’s lip or tongue.
- Inflation of endotracheal/tracheotomy tube to be monitored regularly .
- Positioning of endotracheal/tracheotomy tube to be monitored regularly nature of aspirate can be observed Symptoms to be reported immediately .
- Aseptic technique to be used when carrying out procedures involving tracheotomy or endotracheal tube.
- Functioning of ventilator alarms to be checked at beginning of each shift.
- Ventilator settings to be checked and recorded every hour.
- Tubing’s leadings from ventilator to patient must be checked at least every hour and accumulated moisture to be removed.
- Humidifier to be kept adequately filled with sterile distilled water.
- Tuning and water in humidifier must be kept scrupulously clean, including connections and adapters, which are to be removed for sterilization every 24 hours.
- In presence of possible ventilator fault, nurse must always first check clinical state of patient.
- If this is satisfactory then proceed to detect fault.
- If patient shows signs of insufficient ventilation, nurse must start manual ventilation whilst waiting for assistance.
- Avoid positioning ventilation tubes above patient’s head to avoid water entering lungs.
- Humidifier to be changed daily and sterile water to be used.
- Weaning is usually commenced in day time rather than at night.
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