Topic 9: Oxygen Supplementation Flashcards Preview

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Flashcards in Topic 9: Oxygen Supplementation Deck (15):

Why would we administer oxygen?

  •  stabilisation in an emergency situation,
  • as ongoing therapy or for pre-oxygenation prior to induction of general anaesthetic
  • Any disease process that lowers oxygen levels


Clinical signs of anoxia?

  • Increased respiratory rate, effort and sound
  • MMC pale, blue, brownish
  • animal my hold its head out with neck stretched away from its body, or elbows may be pointed outwards away from the body, as well as nostrils flaring.
  • Check oxygen saturation levels
    -Arterial blood gas measurement 
    -Pulse oximetry


List the most commonly used methods of oxygen supplementation

  • Flow-by
  • Mask
  • Hood
  • Oxygen cage


List the more invasive methods of oxygen supplementation?

  • Nasal/Nasopharyngeal
  • Transtracheal tube
  • Endotracheal tube
  • Mechanical ventilator


What is the aim when selecting a method of oxygen supplementation?

  • keeps the patient calm and reduces stress
  • increases blood oxygen levels effectively
  • and is the best choice for the amount and duration of oxygen therapy required 


Oxygen must be delivered humidified! How is this done?

is achieved via a humidifying device or bubbling oxygen through sterile water/saline.   


Name and describe two complications of oxygen therapy

  • Respiratory depression

  • over-supplementation, which is considered to cause oxygen toxicity. This causes individuals to display signs of dyspnoea (difficulty breathing and shortness of breath), especially when a patient is exposed to higher partial pressures of oxygen than in normal air. 


Describe flow-by technique

  • tubing/prongs near nose
  • Flow rate 2L/min, inspired air at 25% O2


Describe mask technique

  • face mask attached to circle or rebreathing circuit
  • requires administration by staff member continuously
  • short term option only
  • FR 8L/min
  • air % 50
  • Mask must be vented to prevent build up


Describe hood technique

  • E-collar and plastic wrap
  • must be vented
  • FR 1L/min
  • air % 40
  • good for cats


Describe oxygen cage technique

  • cats or small dogs
  • cage must be filled initially, time consuming
  • air % 50
  • -ve is patient cannot be assessed w/out opening cage
  • can get hot


Describe nasal catheter technique

  • one or both nostrils directly into respiratory tract to O2 source
  • usually silicon feeding tube
  • measure area from lateral canthus of eye to nostril
  • lubricate and insert
  • replace every 48hrs
  • FR 50-150ml/kg/min
  • air % 70


Describe transtracheal technique

  • very invasive, severe sitcho only
  • for upper airway obstruction or open mouth breathing
  • large bore catheter placed through skin into trachea b/w 3rd & 4th tracheal ring
  • FR 50mls/kg/min
  • air % 40-60


Describe mechanical ventilation technique

  • Placement of endotracheal tube
  • animal must be anaesthetised
  • placed directly into trachea
  • air % 100
  • FR dependant on size of patient
  • Used for respiratory paralysis conditions