How Does Adenotonsillectomy Affect the Olfactory Threshold in Children?

  • Samireh FarshchiEmail author
  • Osman Mohammad Karim
  • Mohammad Amir Korani
  • Mohammadamin Joulani
Original Article


Adenotonsillectomy is one of the main operations on the head and neck surgery quality in children. This study aimed to compare the olfactory threshold changes in adenotonsillectomy patients. This comparative study was done on 152 children whom candidate for adenotonsillectomy before and 3 weeks after the operation referred to the Dr. Kermanshahi Hospital, Kermanshah, Iran during 2015–2016. The olfactory threshold was determined by olfactory test using phenyl butyl alcohol in propylene glycol. The orthonasal test was done by a strip and the lowest propylene glycol detection used as olfactory threshold. The mean age was 6.81 ± 3.83 of patients were boys and 69 of them were girls. The allergic rhinitis was detected in 83.6% of the patients before the adenotonsillectomy while it was only in 16.4% after adenotonsillectomy. Also, nocturia was higher before the adenotonsillectomy 104 (68.4%) compared to post-adenotonsillectomy 48 (31.6%). In 73 (48%) patients, the sleep quality score was 10 after the surgery while there was a patient with score 10 before the operation. The positive allergic rhinitis was higher in male 70 (84.3%) compared to female 57 (82.6%). Also, no significant difference detected on nocturia (P = 0.531). Also, significant difference detected between 2 groups in sleep quality score before and after the adenotonsillectomy (P = 0.001). The olfactory threshold significantly improved after surgery compared to previous (P = 0.034). These results suggest olfactory threshold improves after adenotonsillectomy in children.


Adenotonsillectomy Olfactory threshold Allergic rhinitis Nocturia Sleep quality score 



This work was performed in partial fulfillment of the requirements for MD. Of Osman Mohammad Karim, in Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran.


The authors gratefully acknowledge the Research Council of Kermanshah University of Medical Sciences (Grant Number: 94377) for the financial support.

Compliance with Ethical Standards

Conflict of interest

The authors declare that there are no conflict of interest.

Data Confidentiality

The authors declare having followed the protocols in use at their working center regarding patient’s data publication.

Protection of Humans and Animals

The authors declare that the procedures were followed according to the regulations established by the Clinical Research and Ethics Committee and to the Helsinki Declaration of the World Medical Association.


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Copyright information

© Association of Otolaryngologists of India 2018

Authors and Affiliations

  • Samireh Farshchi
    • 1
    Email author
  • Osman Mohammad Karim
    • 2
  • Mohammad Amir Korani
    • 3
  • Mohammadamin Joulani
    • 4
  1. 1.Department of Otorhinolaryngology, Imam Khomaini HospitalKermanshah University of Medical SciencesKermanshahIran
  2. 2.Student Research Committee, Faculty of MedicineKermanshah University of Medical SciencesKermanshahIran
  3. 3.Faculty of MedicineKermanshah University of Medical SciencesKermanshahIran
  4. 4.Student Research Committee, Faculty of MedicineIran University of Medical SciencesTehranIran

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