The Effects of Preoperatively Chewing Gum on Sore Throat After General Anaesthesia With a Laryngeal Mask

Status

UNKNOWN

Phases

Phase 1Phase 2

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT03885752

Enrollment

Registered

2019-03-22

Start date

2019-03-25

Completion date

2019-06-30

Last updated

2019-06-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Postoperative Sore Throat

Brief summary

Postoperative sore throat (POST) is an important problem after general anaesthesia. We assessed whether chewing gum preoperatively can reduce the incidence of POST after general anaesthesia administered via a streamlined liner of the pharyngeal airway (SLIPA).

Interventions

OTHERswallow twice

asked to swallow twice without any additional treatment.

DRUGchewed mint gum

In the preoperative waiting area before transferring to the operating room, patients in group G chewed mint gum for 2 minutes and then spit it out.

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

PREVENTION

Masking

DOUBLE (Investigator, Outcomes Assessor)

Eligibility

Sex/Gender

FEMALE

Age

20 Years to 65 Years

Healthy volunteers

Inclusion criteria

American Society of Anaesthesiologists (ASA) class I or II 20-65 years body mass index (BMI) scores \<30 undergoing elective hysteroscopic surgery -

Exclusion criteria

chronic laryngitis chronic bronchitis asthma gastroesophageal reflux allergies to study drugs recent use of non-steroidal anti-inflammatory drugs (NSAIDs) a history of upper respiratory tract infection in the past one week Mallampati grade\>2 a history of steroid therapy. \-

Design outcomes

Primary

Measure	Time frame	Description
the incidence of POST scores > 3	within 24 hours after surgery	POST was evaluated by the Numerical Rating Scale (NRS), which ranges from 0 to 10 points, with 0 indicating completely painless, 1\ 3 indicating mild discomfort, 4 \ 6 indicating moderate pain, and 7\ 10 indicating severe pain.

Secondary

Measure	Time frame	Description
the POST scores	2 hours, 6 hours and 24 hours after surgery.	POST was evaluated by the Numerical Rating Scale (NRS), which ranges from 0 to 10 points, with 0 indicating completely painless, 1\ 3 indicating mild discomfort, 4 \ 6 indicating moderate pain, and 7\ 10 indicating severe pain.

Other

Measure	Time frame	Description
subgroup analysis with patient subdivided based on whether the laryngeal mask had blood on it.	Immediately after removal of laryngeal mask	blood stain

Countries

China

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026