Table 1c.

Other operations, corticosteroid treatment, and complications in studies with a follow-up of minimum 12 months

Publication	Other operations in conjunction with BET	Operations during follow-up	Corticosteroids pre/postop	Other instructions or medication	Complications
Silvola et al., 2014 [8]	No TM perforation or grommet → tympanostomy	Valsalva positive at 1 month → grommet removal 1 pt unable to do Valsalva → revision BET 3 pt BET to contralateral side 4 pt did not improve → technetium scintigraphy and for 3 of them explorative tympanotomy and middle ear endoscopy (one had carotid dehiscence and received no further operations)	Nasal corticosteroid for min 1 month preoperatively and 1 month postoperatively	Valsalva 2 times/day; if Valsalva negative at 1 week, Politzer maneuver → some could perform Valsalva after that	NR
Schröder et al., 2015 [10]	No	Revision BET to 68/622 pt marked as lost to follow-up for the first operation at the time of revision	Nasal corticosteroid for 6 weeks postop	NR	Emphysema in the parotid region (0.3%), minor bleeding, temporary increase of tinnitus, all resolved with time; insertion of balloon catheter unsuccessful in 3 pt (4 ears)
Dalchow et al., 2016 [9]	Tympanoplasty to 124/342 pt before or in conjunction with BET	Revision BET to 38/342 pt	250 mg prednisolone on day 1 postoperatively	Cefuroxime 500 mg ×2 for 5 days postoperatively	No
Xiong et al., 2016 [11]	NR	NR	Nasal corticosteroid, minimum 6 months preoperatively	NR	No
Leichtle et al., 2017 [2]	BET+tympanocenthesis (24 cases), tympanoplasty type I (5 cases), tympanoplasty type III (3 cases)	Revision BET (2 cases)	NR	Instructions and motivation for Valsalva and/or Politzer at every visit	Hemotympanum (7%) resolved with time, minor nasal bleeding (21%) resolved with intranasal xylometazoline

BET, balloon Eustachian tuboplasty; NR, not reported; pt, patient(s); TM, tympanic membrane