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Cauda Equina Syndrome
Tom Fearnehough
YAS Paramedic in Sheffield
Objectives
● To gain a better understanding of causes
symptoms and treatment of Cauda Equina
Syndrome
● To gain a better understanding of the thought
processes involved in clinical decision making.
Clinical Decision Making
● The environment in which paramedics work
encourages them to make rapid and intuitive
decisions based on first impressions (Croskerry
2009).
● Although the intuitive approach is useful (e.g.
STEMI, cardiac arrest) it can lead paramedics
to ignore possible differential diagnoses.
Dual Process Theory
● Dual process theory recognises the role of
intuitive (system 1) and analytical (system 2)
thought processes in clinical decision making.
● By combining these two approaches an initial
hypothesis can be rigorously tested and reduce
the likelihood of clinical error (Croskerry 2009).
Dual Process Theory
(adapted from Coskerry 2009)
System 1 System 2
Cognitive Style Intuitive Analytical
Speed Fast Slow
Effort Low High
Awareness Low High
Reliability Low High
Scientific rigour Low High
Bias High Low
Scenario
● I had attended a number of patients during the
week who had mechanical falls with no injuries
and had pressed their alarm pendant.
● All of these patients had been left at home a
referred to the falls team.
● Terrafix flashes up the message '82 year old
male – fallen – the patient is still on the floor'
Clinical Impression – mechanical fall
System 1 System 2
Cognitive Style Intuitive Analytical
Speed Fast Slow
Effort Low High
Awareness Low High
Reliability Low High
Scientific rigour Low High
Bias High Low
Scenario (continued)
● I am met at the door by a very apologetic lady
who says she only wanted the alarm company
to help her husband off the floor.
● Upstairs I find the patient sat on the floor by the
bed. He says that he doesn't need an
ambulance as he's only slipped off the bed
whilst trying to put his socks on.
Clinical impression – Mechanical fall
System 1 System 2
Cognitive Style Intuitive Analytical
Speed Fast Slow
Effort Low High
Awareness Low High
Reliability Low High
Scientific rigour Low High
Bias High Low
Scenario (continued)
● The patient is quite large so I call back the
alarm company to ask for assistance – no such
luck!
● I call control to request a crew or a car with a
mangar elk to assist with a lift.
● Time to kill... practice some patient assessment
skills.
Scenario (continued)
● PMH – sciatica, arthritis
● Medications – paracetamol
● History
– increased sciatic type pain and back pain since
yesterday which prevented him doing his daily walk
to the newsagents.
– slipped off the bed trying to put socks on.
Clinical impression – Mechanical fall
System 1 System 2
Cognitive Style Intuitive Analytical
Speed Fast Slow
Effort Low High
Awareness Low High
Reliability Low High
Scientific rigour Low High
Bias High Low
Scenario (continued)
● Observations – within normal parameters
● Neuro – FAST -ve / PEARL / CN II – XII intact
● Respiratory – normal
● Abdominal – normal (no urinary symptoms***)
● Cardiovascular – normal, ECG - NSR
● Musculoskeletal – no injuries / normal range
of movement. Back pain and bilateral sciatic
Clinical impression – Mechanical fall
System 1 System 2
Cognitive Style Intuitive Analytical
Speed Fast Slow
Effort Low High
Awareness Low High
Reliability Low High
Scientific rigour Low High
Bias High Low
Scenario (continued)
●● Assessment● Assessment of sensation in lower limbs – both
sides the same.
● 'Do you have any numbness or tingling
anywhere?'
Scenario (continued)
Patient mentions that he has not been able to
feel the toilet paper when he wiped his bottom.
Clinical impression – Cauda Equina
Syndrome?
System 1 System 2
Cognitive Style Intuitive Analytical
Speed Fast Slow
Effort Low High
Awareness Low High
Reliability Low High
Scientific rigour Low High
Bias High Low
The Cauda Equina
Cauda Equina Syndrome
● Cauda equina syndrome is caused by
compression of the cauda equina.
● It can be caused by
– vertebral disc herniation (most common)
– lower back surgery
– tumours
– trauma
– congenital defects
Cauda Equina Syndrome
● Symptoms include:
– back pain
– unilateral / bilateral sciatica
– bladder and / or bowel dysfunction
– reduced sensation in the saddle (perineal)
area
– sexual dysfunction
– possible neurological deficit in the lower limb
(motor/sensory loss, reflex change).
Cauda Equina Syndrome
● Pre-hospital treatment
– analgesia
– spinal immobilisation unnecessary unless the
cause is traumatic
– rapid transport to A&E with ASHICE call
● Hospital treatment
– MRI scan asap
– Surgery (within 24-48 hours)
References / Further Reading
● CROSKERRY, Pat (2009). Clinical cognition and
diagnostic error: Applications of a dual process model
of reasoning. Advances in Health Sciences Education:
Theory and Practice, 14 Suppl 1 , 27-35.
● PILBERY, Richard (2014). Cauda equina syndrome –
trouble with the horses tail? standbycpd.com/store.
● http://www.cesassociation.org.uk/
In Summary
● A dual processes approach combining system 1
and system 2 should be used in clinical
decision making.
● We should be aware of the causes, symptoms
and treatment for Cauda Equina Syndrome.

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Cauda equina

  • 1. Cauda Equina Syndrome Tom Fearnehough YAS Paramedic in Sheffield
  • 2. Objectives ● To gain a better understanding of causes symptoms and treatment of Cauda Equina Syndrome ● To gain a better understanding of the thought processes involved in clinical decision making.
  • 3. Clinical Decision Making ● The environment in which paramedics work encourages them to make rapid and intuitive decisions based on first impressions (Croskerry 2009). ● Although the intuitive approach is useful (e.g. STEMI, cardiac arrest) it can lead paramedics to ignore possible differential diagnoses.
  • 4. Dual Process Theory ● Dual process theory recognises the role of intuitive (system 1) and analytical (system 2) thought processes in clinical decision making. ● By combining these two approaches an initial hypothesis can be rigorously tested and reduce the likelihood of clinical error (Croskerry 2009).
  • 5. Dual Process Theory (adapted from Coskerry 2009) System 1 System 2 Cognitive Style Intuitive Analytical Speed Fast Slow Effort Low High Awareness Low High Reliability Low High Scientific rigour Low High Bias High Low
  • 6. Scenario ● I had attended a number of patients during the week who had mechanical falls with no injuries and had pressed their alarm pendant. ● All of these patients had been left at home a referred to the falls team. ● Terrafix flashes up the message '82 year old male – fallen – the patient is still on the floor'
  • 7. Clinical Impression – mechanical fall System 1 System 2 Cognitive Style Intuitive Analytical Speed Fast Slow Effort Low High Awareness Low High Reliability Low High Scientific rigour Low High Bias High Low
  • 8. Scenario (continued) ● I am met at the door by a very apologetic lady who says she only wanted the alarm company to help her husband off the floor. ● Upstairs I find the patient sat on the floor by the bed. He says that he doesn't need an ambulance as he's only slipped off the bed whilst trying to put his socks on.
  • 9. Clinical impression – Mechanical fall System 1 System 2 Cognitive Style Intuitive Analytical Speed Fast Slow Effort Low High Awareness Low High Reliability Low High Scientific rigour Low High Bias High Low
  • 10. Scenario (continued) ● The patient is quite large so I call back the alarm company to ask for assistance – no such luck! ● I call control to request a crew or a car with a mangar elk to assist with a lift. ● Time to kill... practice some patient assessment skills.
  • 11. Scenario (continued) ● PMH – sciatica, arthritis ● Medications – paracetamol ● History – increased sciatic type pain and back pain since yesterday which prevented him doing his daily walk to the newsagents. – slipped off the bed trying to put socks on.
  • 12. Clinical impression – Mechanical fall System 1 System 2 Cognitive Style Intuitive Analytical Speed Fast Slow Effort Low High Awareness Low High Reliability Low High Scientific rigour Low High Bias High Low
  • 13. Scenario (continued) ● Observations – within normal parameters ● Neuro – FAST -ve / PEARL / CN II – XII intact ● Respiratory – normal ● Abdominal – normal (no urinary symptoms***) ● Cardiovascular – normal, ECG - NSR ● Musculoskeletal – no injuries / normal range of movement. Back pain and bilateral sciatic
  • 14. Clinical impression – Mechanical fall System 1 System 2 Cognitive Style Intuitive Analytical Speed Fast Slow Effort Low High Awareness Low High Reliability Low High Scientific rigour Low High Bias High Low
  • 15. Scenario (continued) ●● Assessment● Assessment of sensation in lower limbs – both sides the same. ● 'Do you have any numbness or tingling anywhere?'
  • 16. Scenario (continued) Patient mentions that he has not been able to feel the toilet paper when he wiped his bottom.
  • 17. Clinical impression – Cauda Equina Syndrome? System 1 System 2 Cognitive Style Intuitive Analytical Speed Fast Slow Effort Low High Awareness Low High Reliability Low High Scientific rigour Low High Bias High Low
  • 19. Cauda Equina Syndrome ● Cauda equina syndrome is caused by compression of the cauda equina. ● It can be caused by – vertebral disc herniation (most common) – lower back surgery – tumours – trauma – congenital defects
  • 20. Cauda Equina Syndrome ● Symptoms include: – back pain – unilateral / bilateral sciatica – bladder and / or bowel dysfunction – reduced sensation in the saddle (perineal) area – sexual dysfunction – possible neurological deficit in the lower limb (motor/sensory loss, reflex change).
  • 21. Cauda Equina Syndrome ● Pre-hospital treatment – analgesia – spinal immobilisation unnecessary unless the cause is traumatic – rapid transport to A&E with ASHICE call ● Hospital treatment – MRI scan asap – Surgery (within 24-48 hours)
  • 22. References / Further Reading ● CROSKERRY, Pat (2009). Clinical cognition and diagnostic error: Applications of a dual process model of reasoning. Advances in Health Sciences Education: Theory and Practice, 14 Suppl 1 , 27-35. ● PILBERY, Richard (2014). Cauda equina syndrome – trouble with the horses tail? standbycpd.com/store. ● http://www.cesassociation.org.uk/
  • 23.
  • 24. In Summary ● A dual processes approach combining system 1 and system 2 should be used in clinical decision making. ● We should be aware of the causes, symptoms and treatment for Cauda Equina Syndrome.