Mega Medical

Analgesic Inhalation System – O Series

Compact Demand Entonox / Equanox Sedation Unit


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The Analgesic Inhalation System is a demand inhalation unit for the administration of 50% Nitrous Oxide / 50% oxygen (Entonox or Equanox) analgesic gas mixture. The unit is specifically designed for use in emergency and obstetric analgesia. It is ideal for the relief of pain in a range of situations, including:

  • Transporting accident victims
  • Accident and Emergency Wards
  • Childbirth
  • Minor surgical procedures such as changing dressings, removing sutures, reduction of fractures


  • Safe and effective means of delivering analgesic gas mixture
  • System contains the reliable Series-O Regulator
  • Delivers high flow rates with low triggering pressures reducing the amount of effort required from the patient to maintain the flow
  • Can be attached to any standard 400 kPa outlet.


  • Demand Flowrate: 0 – 160 LPM
  • Demand Flow Triggering Pressure: -5 cm h3O @ 100 LPM, maximum
  • Supply Pressure: 400 kPa nominal
  • Exhalation Resistance: -5 cm h3O @ 50 LPM, maximum
  • Inlet Connection: 5/8″” – 18 UN
  • Patient Connection: 22 / 15 mm male / female taper
  • Weight: 230 grams
  • Gas: 50% Nitrous Oxide & 50% Oxygen Premixed Gas

Standard Contents

  • Entonox Demand Valve
  • 1.5 metre Entonox Hose assembly
  • Adult Mask
  • Medical Entonox Regulator