Fig. 1From: Effect of intratracheal dexmedetomidine combined with ropivacaine on postoperative sore throat: a prospective randomised double-blinded controlled trialA disposable laryngo-tracheal mucosal atomization device (A); Five ml of the treatment drug was sprayed onto the tracheal mucosa and glottis to achieve uniform surface anaesthesia (B and C)Back to article page