Dornhofer and Gardner reported the Ossiculoplasty Outcome Parameter Staging (OOPS) Index for evaluating a patient undergoing ossiculoplasty. The authors are from the University of Arkansas.
Patient selection: ossiculoplasty
Parameters:
(1) drainage
(2) mucosa
(3) ossicles
(4) type of surgery
(5) revision surgery
Parameter
Finding
Points
drainage
none
0
present > 50% of time
1
mucosa
normal
0
fibrotic
2
ossicles
normal
0
malleus present, stapes absent
1
malleus absent
2
type of surgery
no mastoidectomy
0
canal wall up mastoidectomy
1
canal wall down mastoidectomy
2
revision surgery
no
0
yes
2
where:
• Point assignment for drainage less than 50% of the time is unclear.
total score =
= SUM(points for all 5 parameters)
Interpretation:
• minimum: 0
• maximum: 9
• The higher the score the greater the complexity of the surgery and the worse the outcome.
Score
Risk Group
0 or 1
low
2 or 3
intermediate
>= 4
high
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