The ASIA Exam Flashcards

1
Q

How do we find the motor level in the ASIA exam?

A

the most caudal segment with normal motor function on each side of body - evaluated by assessing myotomes and voluntary anal contraction

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2
Q

How do we find the sensory level in the ASIA exam?

A

the most caudal segment with normal sensory function on each side of body - evaluated with key sensory point within 28 dermatomes and deep anal sensation.

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3
Q

Explain scoring of dermatomes

A

2 - normal sensation
1 - altered sensation
0 - absent sensation

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4
Q

How does muscle function testing differ from standard MMT for ASIA exam?

A
  • Entire exam in supine
  • No + or - scores
  • Option for documented Not testable (NT)
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5
Q

What are the UE Key Muscles?

A

C5: elbow flexors
C6: wrist extensors
C7: elbow extensors
C8: finger flexors
T1: finger abduction (little finger)

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6
Q

What are the LE Key Muscles?

A

L2: hip flexors
L3: knee extensors
L4: ankle DF
L5: long toe extensors
S1: ankle PF

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7
Q

Why were the key muscles chosen?

A
  1. Representative of each spinal cord segment
  2. Each muscle/action has functional significance
  3. Each muscle/action is adequately accessible and easily isolated in supine
  4. Each muscle has innervation of at least 2 spinal segments.
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8
Q

If a sensory level (LT/PP) =2, what can be assumed about motor function?

A

presumed that motor would be 5

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9
Q

Why are there non-key muscles included in the ASIA exam?

A
  • Determine AIS-B vs AIS-C
  • Helpful to prep for functional capabilities
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10
Q

What is the neurological level of injury and how do we find it? What does it represent?

A
  • most caudal segment of SC with normal sensory and antigravity muscle function on both sides of body.
  • Prognostic indicator and expected functional capabilities.
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11
Q

What are the components of the rectal exam for the ASIA and why are they relevant?

A

Digital stem + flex finger, able to feel? Y or N, ask pt to tighten and relax anal muscles on command.

False positive: tone, bearing down

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12
Q

How does the ASIA differentiate between complete versus incomplete injuries?

A
  • Complete: absence of sensory and motor at S4-5
  • Incomplete: partial preservation of sensory + motor funciton at S4-5
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13
Q

What are zones of partial preservation? When do we report them?

A

Dermatomes and myotomes caudal to sensory and motor levels with paritally preserved functions (recorded as single lowest preserved segment on right and left exam)

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14
Q

If no key muscles have partial motor function caudal to the NLI, the motor ZPP would be…

A

the same as the original motor level

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15
Q

ASI-A

A

NO sensory or motor function is preserved in the sacral segments S4-5.
*ZPP may be present. *

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16
Q

ASI-B

A

Sensory preserved below NLI, including the sensory sacral segments S4-5.
AND
NO motor function >3 levels below the motor level on either side of the body (key + non-key muscles)

17
Q

ASI-C

A

Motor function preserved at the most caudal sacral segments for VAC.
OR
AIS-B status AND some sparing of motor function >3 levels below IPSI motor level on either side of body (key muscles)

<50% of key muscles function below the single NLI have muscle grade greater than or equal to 3.

18
Q

ASI-D

A

Motor incomplete status AIS-C BUT with at least half or more key muscle functions below the sinle NLI with muscle grade of 3 or more.

19
Q

If an individual survives the first 24 hours post-SCI, statistically they will likely be alive how many years later?

A

10

20
Q

Why is acute mortality higher in the first year post-injury?

A

Medical complications, emotional, lifestyle changes, autonomic dysfunction, etc.

21
Q

What are the leading secondary sequela that lead to death?

A

Pneumonia <– COUGH control
Septicemia <– lack of sensation

22
Q

What is the number one prognostic indicator to tell if a patient will be able to ambulate after SCI?

A

ASIA level on Initial Eval

23
Q

What other indicators affect prognosis to ambulate?

A
  • Early exam of reflexes
  • SCI syndromes
  • Acquired SCI less likely than traumatic SCI
  • Age
24
Q

In general, what do we know about the potential to improve ASIA levels in one year?

A

Most people will be the same ASIA level one year later, except a level C might improve to a level D