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Prehospital Analgesia

Prehospital Analgesia. Dr David Teubner 20/7/5 http://www.davidteubner.com/work_talks.htm. What is pain?. Pain is an unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage. IASP 1986. Types of pain.

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Prehospital Analgesia

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  1. Prehospital Analgesia Dr David Teubner 20/7/5 http://www.davidteubner.com/work_talks.htm

  2. What is pain? Pain is an unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage. IASP 1986

  3. Types of pain • Lots of different calssifications • Acute vs chronic

  4. Acute pain • Cause is known • Temporary (< 6 weeks) • Located in area of trauma • Resolves spontaneously

  5. Chronic pain • Untreated pain may lead to neuronal changes which alter pain sensation and lead to chronic pain

  6. History of prehospital analgesia • US army ambulances in the 1860’s carried brandy for pain relief • Even today there is very little scientific evidence for any of the techniques used

  7. Analgesia myths • No diagnosis = no analgesia • Analgesia masks clinical signs • We do a good job in providing analgesia • Any dose of morphine will provide pain relief • Analgesia causes dependence • Analgesia causes adverse events

  8. Time to analgesia • Oligoanalgesia well recognised in EDs • Frequent source of patient complaint

  9. Assessment of pain • Pain is unique to the individual, it is influenced by • Age • Race • Gender • Culture • Emotional/cognitive state • Prior experience

  10. Measurement of pain • Visual analogue scales • Numerical rating scale • Verbal or adjective rating scale (VRS/ARS):none, mild, moderate, severe, or unbearable.

  11. Management of pain • Non pharmacological • Drugs • Methoxyflurane • Morphine

  12. Non–pharmacological management • Management of the underlying condition • Splinting fractures • Positioning • Reassurance • Others • Cognitive (guided imagery, music, distraction) • Behavioural (relaxation, breathing, biofeedback)

  13. Morphine history • Naturally derived from the opium poppy – Papaver somniferum • Opium first used in about 4000 BC • First medical use in 200 BC • In the 16th century Paracelcus called it laudanum (from latin laudare – to praise) • First isolated in 1803 by Serturner who called it morphia. • Now called morphine instead as most plant alkaloids end in “-ine”

  14. Morphine • Narcotic Opiod analgesic • Bind to Opiod receptors to cause analgesia, euphoria, sedation, and respiratory/physical depression • Stimulates emetic chemoreceptors. • Peripheral vasodilitation and inhibition of baroreceptors. • Histamine release is common • 2-20 mg IV  Paeds 0.1-0.2 mg/kg

  15. Morphine indications • Pain • Musculoskeletal • Chest • Abdominal

  16. Contraindications Known allergy

  17. Morphine - precautions • Prepare to manage hypotension and respiratory depression -use w/ caution in COPD and Asthma • Inhibits peristalsis • Rapid injection increases incidence of adverse reactions • Headache

  18. Questions?

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