[General anesthesia for thyroplasty employing voice test].
BACKGROUND
We reported an anesthetic technique for thyroplasty employing voice test. Thyroplasty is performed to improve voice quality in patients with unilateral vocal cord paralysis. Correct displacement of the vocal cord is assessed by asking the patient to phonate. At this point all patients should have recovered from general anesthesia and cooperate to phonation, facilitating correct displacement of the vocal cords.


METHODS
Anesthesia was induced with i.v. pentazocine 15-30 mg and continuous propofol infusion 10 mg x kg(-1) x hr(-1). The patients received propofol infusion 4-6 mg x kg(-1) x hr(-1) with spontaneous ventilation. At the point of correct displacement of the vocal cords, we stopped propofol infusion and all the patients woke up immediately and cooperated. After determining the voice propofol was given at a rate of 4-6 mg x kg(-1) x hr(-1).


RESULTS
The average times of surgery and anesthesia were 98 +/- 23 min and 139 +/- 22 min, respectively. At the point of correct displacement of the vocal cords, the average time from the end of propofol infusion until awakening with good quality of recovery was 313 +/- 93 sec. No patients complained of pain during or after


CONCLUSIONS
This anesthetic technique provided both optimal operating conditions and patient comfort without serious complications.
Muto
Takao
T
Department of Anesthesia, Tokyo Medical University, Hachioji Medical Center.
Nakamura
Kazuhiro
K
Sagara
Takeshi
T
Kakinuma
Takayasu
T
Sogabe
Yutaka
Y
Uchino
Hiroyuki
H
Ogihara
Yukihiko
Y
Ishii
Nagao
N
D000368:Aged; D018686:Anesthetics, Intravenous / Q000008:administration & dosage; D005260:Female; D006801:Humans; D007432:Intraoperative Period; D007830:Larynx / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000379:methods*; D010699:Phonation; D015742:Propofol / Q000008:administration & dosage; D014826:Vocal Cord Paralysis / Q000601:surgery*
D018686:Anesthetics, Intravenous; D015742:Propofol