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Postoperative sore throat and hoarseness Clinical studies in patients undergoing general anesthesia

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Postoperative sore throat and hoarseness

Clinical studies in patients

undergoing general anesthesia

av

Maria Jaensson

Akademisk avhandling

Avhandling för medicine doktorsexamen i medicinsk vetenskap med inriktning hälso- och vårdvetenskap,

som kommer att försvaras offentligt Fredagen den 20 december 2013 kl.09.00, Wilandersalen, Universitetssjukhuset Örebro

Opponent: Professor Jonas Åkesson

Institutionen för kliniska vetenskaper, Lunds universitet Lund

Örebro universitet

Institutionen för hälsovetenskap och medicin 701 82 ÖREBRO

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Abstract

Maria Jaensson (2013): Postoperative sore throat and hoarseness. Clinical studies in patients undergoing general anesthesia, Örebro Studies in Care Sciences 51.

A common problem following general anesthesia is postoperative sore throat (POST) and postoperative hoarseness (PH). Symptoms directly correlated with less satisfaction according to the patients. The overall aim of this thesis was to describe patients' postoperative sore throat and hoarseness after general anesthesia with endotracheal intubation or laryn-geal mask airway. As well as to investigate the risk factors that are associ-ated with the symptoms, and to test methods that may prevent sore throat and hoarseness after a general anaesthetics. A total of 889 patients are included in the four studies. Incidence of POST varied from 21% up to 52 % depending on endotracheal tube (ETT) size in women (I-IV) and in men was the incidence 32-38% (III-IV). There were no gender difference in POST in study III and IV. The overall incidence of PH varied from 42-59% (I-IV) in all patients, with no gender differences (III-IV). Following a laryngeal mask airway (LMA) 19% of the patients had POST and 33% of the patients reported PH. Patients with POST do seem to be able to local-ize their pain in the throat (IV). Different risk factors are shown to con-tribute to both POST and PH in men and women (II-III). To intubate with a smaller ETT size, 6.0 vs. 7.0 decreased POST in women in the early postoperative period as well as their discomfort from their POST (I). Only 6% of men who needed a laryngeal mask airway had POST compared to 26% of women. The symptoms are more discomforting after an ETT vs. an LMA up to 24 hours (IV). More patients have sore throat and hoarse-ness in the early postoperative period, but the symptoms can remain up to almost 5 days postoperatively (I, IV). In summary, sore throat and hoarse-ness following general anesthesia, affects many patients postoperatively. To intubate women with endotracheal size 6.0 decreases both sore throat and hoarseness postoperatively. Women are more likely than men to have a sore throat when a laryngeal mask airway is used.

Keywords: Sore throat, Hoarseness, Postoperative, Complication, Endotracheal tube, Laryngeal Mask Airway, Gender, Risk factor.

Maria Jaensson, School of Health and Medical Sciences, Örebro University, SE – 701 82 Örebro, Sweden, maria.jaensson@orebroll.se

References

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