0:00

Alright, this is a man,

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36 year old who had a full during work and

0:07

he landed on his wrist.

0:09

He's having severe wrist pain as a result.

0:14

And what we have is on the left, uh,

0:17

a corona fluid sensitive sequence is a fat suppressed T two weight

0:22

sequence where we see widening of the ski for Luna interval,

0:27

uh, what is called the OMA sign on radiographs. Uh,

0:31

given by complete disruption of the ski for lunar ligament,

0:36

you can see the fibers outlined by a fluid field

0:40

defect that is extending through the area of ligament

0:45

disruption.

0:46

Axial images are really important when we are assessing injuries of the skin for

0:51

lunar ligament because they allow us to see the different components

0:56

of the ligament, including the dorsal component,

1:00

the ous component, and the Palmer component. And,

1:03

and as you can see in these axial images,

1:06

there is fluid signal extending all throughout the three components of the

1:11

ski for lunar ligament.

1:13

Hence the severe widening of the SFO Luna interval that

1:18

we're seeing. This was measured up to seven millimeters.

1:22

So this patient has a SFO dissociation.

1:26

One important per here is the capitate bone is

1:31

still in proper positioning.

1:33

We don't see any proximal migration of the capitate to

1:38

indicate that we could be in the setting of SK four LU advanced collapse

1:43

already.

1:44

So the alignment of the mid carpal joint is still preserved,

1:49

but the SK four lu interval is widen.

1:53

The diagnosis here is full thickness tear of the SK four Luna

1:58

ligament, including all three components, dorsal membrane,

2:02

palmer,

2:03

and sate dissociation as a result of the tear.