2018 Section 6 - Laryngology, Voice Disorders, and Bronchoesophalogy

S.-K.

Baek

et

al.

/ Auris Nasus

Larynx

44

(2017)

583 – 589

Fig.

2.

Changes

in

the

fundamental

frequency

value

( D

F0)

between

the

preoperative

value group

and and

those

at

1 week,

1 month,

and

3 months

after

thyroidectomy. thyroidectomy

D F0

shows

a

significant

difference

at

postoperative

1 month

in

the

hemithyroidectomy

at

postoperative

1 week

and

1 month

in

the

total

* =

p < 0.05.

group.

Table

4

of

the

pre-

and

postoperative Voice

Range

Profile

(VRP).

Results

Preoperative

PO

1 week

PO

1 month

PO

3 months

p -Value

Hemithyroidectomy Maximum pitch

Group A Group B Group A Group B Group C Group D Group C Group D

510.5 546.5

12.8 12.9

426.9 387.9

17.6 17.6

408.6 486.3

21.6 21.6

422.2 416.8

19.8 19.8

0.71

pitch

154.7 145.5

4.4 4.4

144.4 132.7

6.0 5.9

143.3 130.7

5.8 5.8

142.5 130.9

5.4 5.5

0.10

Minimum

thyroidectomy

Total

pitch

535.8 536.5

17.2 14.6

446.7 360.9

28.0 14.0

413.6 351.3

26.8 15.2

447.1 403.2

20.8 13.8

0.02

Maximum

pitch

158.4 151.2

3.0 5.6

149.7 139.6

4.8 3.9

147.9 135.4

4.8 3.9

150.7 141.4

5.0 4.0

0.07

Minimum

PO = postoperative; Group A

and

C = IONM

group; Group B

and D= non-IONM

group.

Fig. 3. Changes

in the maximum pitch value

( D Maximum pitch) of

the voice

range profile between

the preoperative value and

those at 1 week, 1 month, and 3 months

thyroidectomy.

D Maximum

pitch

shows

a

significant

difference

at

postoperative

1 week.

* =

p < 0.05.

after

115